CN105032206A - Preparation method for silicate composite based microfiltration membranes and system and method for removing organic pollutants from water through catalyzing ozone oxidation by silicate composite based microfiltration membranes - Google Patents
Preparation method for silicate composite based microfiltration membranes and system and method for removing organic pollutants from water through catalyzing ozone oxidation by silicate composite based microfiltration membranes Download PDFInfo
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Abstract
The invention belongs to the field of water treatment and discloses a preparation method for silicate composite based microfiltration membranes and a system and method for removing organic pollutants from water through catalyzing ozone oxidation by the silicate composite based microfiltration membranes. The silicate composite based microfiltration membranes are used for solving the problem that the ozone oxidation catalyzing efficacy of the existing inorganic porous membranes is relatively weak. The preparation method for the composite based microfiltration membranes comprises the steps: (1) uniformly mixing a silicate cement powder material, a quartz powder material, a gelatin powder material and deionized water, so as to obtain a membrane sizing material; and (2) carrying out dry-pressing shaping on the membrane sizing material, and carrying out curing in water bath, thereby obtaining the microfiltration membranes. The method for removing the organic pollutants from the water comprises the steps: ozone generated by an ozone generator is fed to a bottom zone of an ozone-membrane reaction tower, enters a middle layer of the reaction tower through the microfiltration membranes of a lower layer and is mixed with water so as to form a gas-water mixture, and then, the gas-water mixture is subjected to degradation through the microfiltration membranes of an upper layer, thereby obtaining purified yielding water. By using the ozone-membrane combined process, the ratio of removal of p-CNB from the water reaches up to 90%, and meanwhile, the effect of mineralizing p-CNB is obvious.
Description
Technical field
The invention belongs to water treatment field, be specifically related to a kind of preparation method of silicate composite base microfiltration membranes and apply the system and method that it removes organic pollutants.
Background technology
Catalytic ozonation technology is used widely in the advanced treating of drinking water.Wherein ozone catalyst used can be divided into four classes by existing forms when using: solubilised state, nano particle state, large-size particle state and support type.The catalyst of solubilised state and nano particle can make it in water, obtain good dispersion effect, thus obtain better ozone catalytic effect.But the separation and recovery of catalyst is the problem that must solve.And although the catalyst of bulky grain or support type solves catalyst recovery problem, catalyst compared with nanoparticle catalyst or solubilised state catalyst, thus also cannot can limit the effect of its catalysis ozone with the contact conditions of ozone.In order to solve this two classes contradiction simultaneously, inorganic porous membrane catalytic ozonation starts the concern being subject to people.
Nano level transition metal oxide is mainly fixed on the surface of porous ceramic film pipe by inorganic porous membrane catalytic ozonation by heat treated mode, with the organic pollution in its catalysis ozone degradation water.The advantage of this technology may be summarized to be following 3 points: (1) utilizes tiny fenestra to cut dispersion ozone bubbles, increases the dissolving of ozone; (2) utilize specific area huge in fenestra to improve the contact conditions of ozone and catalyst, promote ozone catalytic efficiency; (3) utilize the ozone strong oxidizing property hydroxyl radical free radical that catalytic decomposition produces in film to be oxidized organic pollution, alleviate fouling membrane, prolonging service lifetime of film.Although advantages, this technology can make catalyst preparing cost improve further.In addition, heat treated process has very strong hydroxyl destruction for the material of rich surface hydroxyl, and these surface hydroxyls are proved to be and have active influence to the generation of strong oxidizer hydroxyl radical free radical in oxidation system.Therefore current inorganic porous membrane catalytic ozonation also cannot make the oxidability of ozone catalytic system be not fully exerted, and is badly in need of a kind of unburned low cost inorganic porous material of exploitation and carrys out catalysis ozone degraded organic pollutants as catalyst.
Summary of the invention
The object of the invention is the problem that usefulness in order to solve existing inorganic porous membrane O3 catalytic oxidation is more weak, and propose the preparation method of silicate composite base microfiltration membranes and remove the system and method for organic pollutants for O3 catalytic oxidation.
The preparation method of silicate composite base microfiltration membranes of the present invention follows these steps to realize:
One, for 1:2 ~ 3:0.2 ~ 0.3:2, portland cement powder, quartz powder materials, gelatin powder and deionized water are mixed in mass ratio, obtain film slurry;
Two, film slurry step one obtained is injected in mould, dry-pressing formed under the pressure of 15 ~ 20MPa, obtains film base, then film base is put into 20 ~ 25 DEG C of water-bath slakings 10 ~ 12 days, obtains silicate composite base microfiltration membranes.
The method preparing the dry-pressing formed-water-bath slaking of employing of silicate composite base microfiltration membranes of the present invention.
The system that organic pollutants is removed in applying silicon hydrochlorate composite base microfiltration membranes O3 catalytic oxidation of the present invention comprises oxygen cylinder, ozone generator, ozone-film reaction tower, distribution reservoir and absorption bottle, upper layer of silicon hydrochlorate composite base microfiltration membranes and lower layer silicate composite base microfiltration membranes is provided with in ozone-film reaction tower, ozone-film reaction tower is divided into bottom zone by two layer silicate composite base microfiltration membranes in vertical direction, mesozone and upper zone, oxygen cylinder is connected with ozone generator, ozone generator is connected by the air inlet of tracheae with the bottom zone of ozone-film reaction tower, water inlet is had in the mesozone of ozone-film reaction tower, distribution reservoir is connected with water inlet by water pipe, also peristaltic pump is provided with in water pipe, gas outlet and delivery port is had in the upper zone of ozone-film reaction tower, absorption bottle is connected with gas outlet by escape pipe.
The method that organic pollutants is removed in applying silicon hydrochlorate composite base microfiltration membranes O3 catalytic oxidation of the present invention follows these steps to realize:
One, upper layer of silicon hydrochlorate composite base microfiltration membranes and lower layer silicate composite base microfiltration membranes is provided with in ozone-film reaction tower, ozone-film reaction tower is divided into bottom zone by two layer silicate composite base microfiltration membranes, mesozone and upper zone, ozone generator is connected with oxygen cylinder, the gaseous ozone that ozone generator produces is sent to the bottom zone of ozone-film reaction tower by tracheae, then flow through lower layer silicate composite base microfiltration membranes and enter mesozone, water inlet drives the bottom in mesozone, water in distribution reservoir flows into mesozone by water pipe, peristaltic pump is provided with in water pipe, air-water mixture is formed in the mesozone of ozone-film reaction tower,
Two, air-water mixture is upward through upper layer of silicon hydrochlorate composite base microfiltration membranes and flows into upper zone under the promotion of oxygen cylinder and peristaltic pump, there is the catalytic decomposition of solubilised state ozone and the degraded of organic pollution in upper layer of silicon hydrochlorate composite base microfiltration membranes, then there is gas-water separation at the top of ozone-film reaction tower, tail gas flows in absorption bottle, moisture content flows out from the delivery port upper zone, the water outlet after being purified.
Applying silicon hydrochlorate composite base of the present invention microfiltration membranes O3 catalytic oxidation and then efficient removal organic pollutants are the raisings due to hydroxyl radical free radical growing amount in system.Ozone molecule easily occurs to decompose the hydroxyl radical free radical producing and have more Strong oxdiative activity at basic matterial or transition-metals and their oxides surface.Containing components such as afwillite, calcium aluminate hydrates and hydrated iron calcium aluminates in silicate composite base microfiltration membranes of the present invention.Afwillite in water environment can slow releasing hydroxide ion thus promote ozone decomposed be hydroxyl radical free radical, and the hydroxyl in the easy adsorbed water molecule of list of elements face such as aluminium, iron in calcium aluminate hydrates and hydrated iron calcium aluminate, and then promote that ozone decomposed is hydroxyl radical free radical.Therefore, ozone of the present invention-silicate composite base microfiltration membranes coupling technique has the ability promoting that hydroxyl radical free radical generates, thus achieves the efficient degradation of target organic.
The gaseous ozone that the present invention is produced by ozone generator is admitted to the bottom of reaction tower, under the promotion of storage pressure, the ozone gas of bottom knows from experience the mesozone entering reaction tower through lower membrane, in the process through lower membrane, pore structure tiny in film will be cut, disperse larger-size ozone bubbles, make the ozone bubbles entering reaction tower intermediate layer reach micron-sized size.After entering mesozone, tiny ozone gas is steeped oneself-meeting and is contacted with the water inlet containing organic pollution herein.And the present invention's ozone gas used can increase the contact area with water after the cutting, peptizaiton of lower membrane, thus improve the concentration of solubilised state ozone in water to a certain extent.In the intermediate layer of reaction tower, air-water mixture can be upward through upper layer film under the promotion of gas cylinder and peristaltic pump.The main catalytic decomposition of generation solubilised state ozone and the efficient degradation of organic pollution near upper layer film.Apply ozone of the present invention-film coupling technique to the clearance of p-CNB in water up to 90%.This ozone-film coupling technique not only effectively can remove the p-CNB in water, and outstanding equally to the remineralization efficacy of p-CNB, when p-CNB initial concentration is 2mg/L, ozone-film coupling technique reaches more than 50% to the clearance of TOC in system.
Accompanying drawing explanation
Fig. 1 is the structural representation that organic pollutants system is removed in the O3 catalytic oxidation of applying silicon hydrochlorate composite base microfiltration membranes;
Fig. 2 is the decomposition usefulness figure of Application Example to solubilised state ozone in water, and wherein ■ represents ozone-film coupling, ● represent independent ozone;
Fig. 3 is the usefulness figure that Application Example ozone-film coupling technique removes p-CNB, and ■ represents absorption, ● represent independent ozone, ▲ represent ozone-film coupling;
Fig. 4 is the variation diagram of residual ozone in system after Application Example p-CNB removes, and wherein represents independent ozone, and zero represents ozone-film coupling;
Fig. 5 is the usefulness figure of TOC in Application Example ozone-film coupling technique removal system, and wherein △ represents independent ozone, and ☆ represents ozone-film coupling;
Fig. 6 is the microcosmic Electronic Speculum figure that silicate composite base microfiltration membranes that embodiment one prepares amplifies 500 times;
Fig. 7 is the microcosmic Electronic Speculum figure that silicate composite base microfiltration membranes that embodiment one prepares amplifies 5000 times;
Fig. 8 is the microcosmic Electronic Speculum figure that silicate composite base microfiltration membranes that embodiment one prepares amplifies 50000 times.
Detailed description of the invention
Detailed description of the invention one: the preparation method of present embodiment silicate composite base microfiltration membranes follows these steps to realize:
One, for 1:2 ~ 3:0.2 ~ 0.3:2, portland cement powder, quartz powder materials, gelatin powder and deionized water are mixed in mass ratio, obtain film slurry;
Two, film slurry step one obtained is injected in mould, dry-pressing formed under the pressure of 15 ~ 20MPa, obtains film base, then film base is put into 20 ~ 25 DEG C of water-bath slakings 10 ~ 12 days, obtains silicate composite base microfiltration membranes.
Detailed description of the invention two: portland cement powder, quartz powder materials, gelatin powder and deionized water mix for 1:2:0.3:2 unlike step one with detailed description of the invention one by present embodiment in mass ratio.Other step and parameter identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment and detailed description of the invention one or two are 20 ~ 50 μm unlike the particle diameter of the portland cement powder described in step one, quartz powder materials and gelatin powder.Other step and parameter identical with detailed description of the invention one or two.
Detailed description of the invention four: one of present embodiment and detailed description of the invention one to three are shaping unlike step 2 dry-pressing 3 minutes under the pressure of 20MPa.Other step and parameter identical with one of detailed description of the invention one to three.
Detailed description of the invention five: film base is put into 20 DEG C of water-bath slakings 12 days unlike step 2 by one of present embodiment and detailed description of the invention one to four.Other step and parameter identical with one of detailed description of the invention one to four.
Detailed description of the invention six: the system that organic pollutants is removed in the O3 catalytic oxidation of present embodiment applying silicon hydrochlorate composite base microfiltration membranes comprises oxygen cylinder 1, ozone generator 2, ozone-film reaction tower 3, distribution reservoir 4 and absorption bottle 5, upper layer of silicon hydrochlorate composite base microfiltration membranes 3-1 and lower layer silicate composite base microfiltration membranes 3-2 is provided with in ozone-film reaction tower 3, ozone-film reaction tower 3 is divided into bottom zone by two layer silicate composite base microfiltration membranes in vertical direction, mesozone and upper zone, oxygen cylinder 1 is connected with ozone generator 2, ozone generator 2 is connected with the air inlet of the bottom zone of ozone-film reaction tower 3 by tracheae 2-1, water inlet is had in the mesozone of ozone-film reaction tower 3, distribution reservoir 4 is connected with water inlet by water pipe 4-1, peristaltic pump 6 is also provided with in water pipe 4-1, gas outlet and delivery port is had in the upper zone of ozone-film reaction tower 3, absorption bottle 5 is connected with gas outlet by escape pipe 5-1.
Present embodiment reaction tower is divided into three layers, places the flat panel silicon hydrochlorate composite base microfiltration membranes being used for catalysis ozone between layers.This system adopts Continuous Flow constant flow to run, and tail gas and water outlet all do not reflux.For making to obtain longer time of contact between gas-liquid, in system, gas, liquid fluid all adopt the mode of upward flow to run.
Detailed description of the invention seven: the method that organic pollutants is removed in the O3 catalytic oxidation of present embodiment applying silicon hydrochlorate composite base microfiltration membranes follows these steps to realize:
One, upper layer of silicon hydrochlorate composite base microfiltration membranes 3-1 and lower layer silicate composite base microfiltration membranes 3-2 is provided with in ozone-film reaction tower 3, ozone-film reaction tower 3 is divided into bottom zone by two layer silicate composite base microfiltration membranes, mesozone and upper zone, ozone generator 2 is connected with oxygen cylinder 1, the gaseous ozone that ozone generator 2 produces is sent to the bottom zone of ozone-film reaction tower 3 by tracheae 2-1, then flow through lower layer silicate composite base microfiltration membranes 3-2 and enter mesozone, water inlet drives the bottom in mesozone, water in distribution reservoir 4 flows into mesozone by water pipe 4-1, peristaltic pump 6 is provided with in water pipe 4-1, air-water mixture is formed in the mesozone of ozone-film reaction tower 3,
Two, air-water mixture is upward through upper layer of silicon hydrochlorate composite base microfiltration membranes 3-1 and flows into upper zone under the promotion of oxygen cylinder 1 and peristaltic pump 6, there is the catalytic decomposition of solubilised state ozone and the degraded of organic pollution in upper layer of silicon hydrochlorate composite base microfiltration membranes 3-1, then there is gas-water separation at the top of ozone-film reaction tower 3, tail gas flows in absorption bottle 5, moisture content flows out from the delivery port upper zone, the water outlet after being purified.
Present embodiment ozone-film coupling technique has significant ozone decomposed ability, efficiently catalysis ozone removal organic polluter usefulness and the organic ability of mineralising.
Detailed description of the invention eight: present embodiment and detailed description of the invention seven are fixed in ozone-film reaction tower by clip unlike step one upper layer of silicon hydrochlorate composite base microfiltration membranes 3-1 and lower layer silicate composite base microfiltration membranes 3-2.Other step and parameter identical with detailed description of the invention seven.
Detailed description of the invention nine: present embodiment and detailed description of the invention seven or eight are 10g/L unlike the KI concentration in the absorption bottle 5 described in step 2.Other step and parameter identical with detailed description of the invention seven or eight.
Detailed description of the invention ten: one of present embodiment and detailed description of the invention seven to nine are 2 ~ 5mm unlike the thickness of the upper layer of silicon hydrochlorate composite base microfiltration membranes 3-1 described in step one and lower layer silicate composite base microfiltration membranes 3-2.Other step and parameter identical with one of detailed description of the invention seven to nine.
Embodiment one: the preparation method of the present embodiment silicate composite base microfiltration membranes follows these steps to realize:
One, in mass ratio for particle diameter is that the portland cement powder of 30 μm, the quartz powder materials of 30 μm, the gelatin powder of 30 μm and deionized water mix by 1:2:0.3:2, film slurry is obtained;
Two, film slurry step one obtained is injected in mould, and dry-pressing formed 3min under the pressure of 20MPa, obtains film base, then film base is put into the water-bath slaking 12 days of 20 DEG C, obtains the silicate composite base microfiltration membranes that thickness is 3mm.
The present embodiment silica flour used is pure quartzy phase (SiO
2), portland cement used is Swan Portland cement, label PO425, purchased from cement plant, Harbin.
Application Example: the method that organic pollutants is removed in the O3 catalytic oxidation of the present embodiment applying silicon hydrochlorate composite base microfiltration membranes follows these steps to realize:
One, upper layer of silicon hydrochlorate composite base microfiltration membranes 3-1 and lower layer silicate composite base microfiltration membranes 3-2 is provided with in ozone-film reaction tower 3, ozone-film reaction tower 3 is divided into bottom zone by two layer silicate composite base microfiltration membranes, mesozone and upper zone, ozone generator 2 is connected with oxygen cylinder 1, the gaseous ozone that ozone generator 2 produces is sent to the bottom zone of ozone-film reaction tower 3 by tracheae 2-1, then flow through lower layer silicate composite base microfiltration membranes 3-2 and enter mesozone, water inlet drives the bottom in mesozone, water in distribution reservoir 4 flows into mesozone by water pipe 4-1, peristaltic pump 6 is provided with in water pipe 4-1, air-water mixture is formed in the mesozone of ozone-film reaction tower 3,
Two, air-water mixture is upward through upper layer of silicon hydrochlorate composite base microfiltration membranes 3-1 and flows into upper zone under the promotion of oxygen cylinder 1 and peristaltic pump 6, there is the catalytic decomposition of solubilised state ozone and the degraded of organic pollution in upper layer of silicon hydrochlorate composite base microfiltration membranes 3-1, then there is gas-water separation at the top of ozone-film reaction tower 3, tail gas flows in absorption bottle 5, moisture content flows out from the delivery port upper zone, the water outlet after being purified.
In the implementation process of this application embodiment, needed for membrane filtration, pressure is provided by oxygen cylinder and peristaltic pump, the volume of ozone-film reaction tower 3 is 250ml, the pressure that oxygen cylinder provides is 60kPa, gas flow 0.4L/min, the flow that peristaltic pump provides is 25ml/min, and hydraulic detention time (HRT) is 10min.
This application embodiment ozone-film coupling technique has good capacity of decomposition to solubilised state ozone in water.Compare the attenuation of solubilised state ozone in independent ozone process and ozone-silicate composite base microfiltration membranes coupling technique, as shown in Figure 2, ozone-film coupling technique significantly can promote the decomposition of ozone in water to result.In independent ozone process, water inlet ozone is almost suitable with the concentration going out water-ozone, does not have obvious ozonolysis phenomena in this process.And in ozone-film coupling technique, when ozone concentration of intaking is lower than 1.5mg/L, in water outlet, can't detect the residual of ozone.This illustrates that the solubilised state ozone of about 1.5mg/L is decomposed through the effect of two layer silicate composite base microfiltration membranes in ozone-film coupling technique.If water inlet ozone concentration is promoted to more than 1.5mg/L, the residual ozone curve in coupling Process for Effluent and independent ozone process to go out water-ozone curve almost parallel.This illustrates that film can't strengthen because of the rising of ozone concentration of intaking the capacity of decomposition of ozone, but has the ability of stable decomposition 1.5mg/L ozone.
Ozone-film coupling technique efficiently can remove the p-CNB in water.Compare the ability that the absorption of reaction unit, separately ozone oxidation and ozone-film coupling technique remove p-CNB, result as shown in Figure 3.Under the condition of higher p-CNB concentration, suction-operated to the clearance of object lower than 5%.Therefore, compared with other two kinds of techniques, the Adsorption of p-CNB can be left in the basket.Independent ozone process and coupling technics comparing are found, even if the initial concentration of p-CNB reaches 15mg/L, coupling technique to the clearance of p-CNB equally up to 90%, and separately ozone process to the clearance of p-CNB mostly below 40%.Compared with independent ozone process, the clearance of object can be promoted more than 50 percentage points to the catalyticing decomposition action of ozone by film.P-CNB is a kind of nitroaromatic of halo, molecular weight 157.55.Nitro in p-CNB structure and halogeno-group all have very strong electron-withdrawing power, and this, by reducing the density of electron cloud on phenyl ring, makes phenyl ring passivation.Therefore ozone molecule is difficult to its attack, and the removal effect of independent ozone process to p-CNB is limited.And in the coupling technique of the present embodiment, by the catalytic action of film, ozone molecule is broken down into the multiple free radical with more high oxidative capacity, therefore obtain better p-CNB removal effect.
Fig. 4 display be the situation of change of residual ozone in system under the condition of variable concentrations p-CNB.Because film is to the efficient-decomposition ability of solubilised state ozone, in coupling technique, the decay of residual ozone is more obvious.When p-CNB initial concentration reaches 15mg/L, the initial ozone of 2.5mg/L is all decomposed consumption in coupling technique, and in water outlet, the amount of residual ozone is almost nil.This result shows the limit of ozone-film coupling process degradation p-CNB ability.
Ozone-film coupling technique not only effectively can remove the p-CNB in water, outstanding equally to the remineralization efficacy of p-CNB.To the result of the mineralization ability of variable concentrations p-CNB as shown in Figure 5.When p-CNB initial concentration is 2mg/L, ozone-film coupling technique reaches 55% to the clearance of TOC in system.Coupling technique can be suppressed the removal of TOC although improve p-CNB initial concentration, clearance is also all more than 35%.Compared with coupling technique, independent ozone process is poor to the removal effect of TOC in reaction system, mostly maintains less than 10%.Therefore, compared with independent ozone process, ozone-film coupling technique not only has good degradation capability to pollutant, to the mineralization ability of pollutant also show more outstanding.
Claims (10)
1. the preparation method of silicate composite base microfiltration membranes, it is characterized in that following these steps to realize:
One, be 1:(2 ~ 3 in mass ratio): (0.2 ~ 0.3): portland cement powder, quartz powder materials, gelatin powder and deionized water mix by 2, obtains film slurry;
Two, film slurry step one obtained is injected in mould, dry-pressing formed under the pressure of 15 ~ 20MPa, obtains film base, then film base is put into 20 ~ 25 DEG C of water-bath slakings 10 ~ 12 days, obtains silicate composite base microfiltration membranes.
2. the preparation method of silicate composite base microfiltration membranes according to claim 1, is characterized in that portland cement powder, quartz powder materials, gelatin powder and deionized water mix for 1:2:0.3:2 by step one in mass ratio.
3. the preparation method of silicate composite base microfiltration membranes according to claim 1, is characterized in that the particle diameter of the portland cement powder described in step one, quartz powder materials and gelatin powder is 20 ~ 50 μm.
4. the preparation method of silicate composite base microfiltration membranes according to claim 1, is characterized in that step 2 dry-pressing 3 minutes under the pressure of 20MPa is shaping.
5. the preparation method of silicate composite base microfiltration membranes according to claim 1, is characterized in that film base is put into 20 DEG C of water-bath slakings 12 days by step 2.
6. the system of organic pollutants is removed in the O3 catalytic oxidation of applying silicon hydrochlorate composite base microfiltration membranes, it is characterized in that the system of this applying silicon hydrochlorate composite base microfiltration membranes O3 catalytic oxidation removal organic pollutants comprises oxygen cylinder (1), ozone generator (2), ozone-film reaction tower (3), distribution reservoir (4) and absorption bottle (5), upper layer of silicon hydrochlorate composite base microfiltration membranes (3-1) and lower layer silicate composite base microfiltration membranes (3-2) is provided with in ozone-film reaction tower (3), ozone-film reaction tower (3) is divided into bottom zone by two layer silicate composite base microfiltration membranes in vertical direction, mesozone and upper zone, oxygen cylinder (1) is connected with ozone generator (2), ozone generator (2) is connected by the air inlet of tracheae (2-1) with the bottom zone of ozone-film reaction tower (3), water inlet is had in the mesozone of ozone-film reaction tower (3), distribution reservoir (4) is connected with water inlet by water pipe (4-1), peristaltic pump (6) is also provided with in water pipe (4-1), gas outlet and delivery port is had in the upper zone of ozone-film reaction tower (3), absorption bottle (5) is connected with gas outlet by escape pipe (5-1).
7. the method for organic pollutants is removed in the O3 catalytic oxidation of applying silicon hydrochlorate composite base microfiltration membranes, it is characterized in that following these steps to realize:
One, upper layer of silicon hydrochlorate composite base microfiltration membranes (3-1) and lower layer silicate composite base microfiltration membranes (3-2) is provided with in ozone-film reaction tower (3), ozone-film reaction tower (3) is divided into bottom zone by two layer silicate composite base microfiltration membranes, mesozone and upper zone, ozone generator (2) is connected with oxygen cylinder (1), the gaseous ozone that ozone generator (2) produces is sent to the bottom zone of ozone-film reaction tower (3) by tracheae (2-1), then flow through lower layer silicate composite base microfiltration membranes (3-2) and enter mesozone, water inlet drives the bottom in mesozone, water in distribution reservoir (4) flows into mesozone by water pipe (4-1), peristaltic pump (6) is provided with in water pipe (4-1), air-water mixture is formed in the mesozone of ozone-film reaction tower (3),
Two, air-water mixture is upward through upper layer of silicon hydrochlorate composite base microfiltration membranes (3-1) and flows into upper zone under the promotion of oxygen cylinder (1) and peristaltic pump (6), in the catalytic decomposition of upper layer of silicon hydrochlorate composite base microfiltration membranes (3-1) upper generation solubilised state ozone and the degraded of organic pollution, then there is gas-water separation at the top of ozone-film reaction tower (3), tail gas flows in absorption bottle (5), moisture content flows out from the delivery port upper zone, the water outlet after being purified.
8. the method for organic pollutants is removed in applying silicon hydrochlorate composite base microfiltration membranes O3 catalytic oxidation according to claim 7, it is characterized in that step one upper layer of silicon hydrochlorate composite base microfiltration membranes (3-1) and lower layer silicate composite base microfiltration membranes (3-2) are fixed in ozone-film reaction tower by clip.
9. the method for organic pollutants is removed in applying silicon hydrochlorate composite base microfiltration membranes O3 catalytic oxidation according to claim 7, it is characterized in that the KI concentration in the absorption bottle (5) described in step 2 is 10g/L.
10. the method for organic pollutants is removed in applying silicon hydrochlorate composite base microfiltration membranes O3 catalytic oxidation according to claim 7, it is characterized in that the thickness of upper layer of silicon hydrochlorate composite base microfiltration membranes (3-1) described in step one and lower layer silicate composite base microfiltration membranes (3-2) is 2 ~ 5mm.
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| CN113443697A (en) * | 2021-07-09 | 2021-09-28 | 哈尔滨工业大学 | Continuous flow device for catalyzing ozone oxidation by multistage membrane module |
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Application publication date: 20151111 |