CN104817218B - A kind of ozone pre-oxidation method for treating water - Google Patents

Abstract

An ozone pre-oxidation water treatment method, the electric control unit (10) controls the water intake of the first water inlet (6) and the ozone output of the ozone diffuser (9), so that the ozone concentration is in the range of 0.8 to 0.9 mg per liter The water inside and the ozone oxidation reaction therein are 5 minutes; The electronic control unit (10) controls the first adjustable mixer (19) stirring and the vibration of the ultrasonic vibrating array (20) according to the water intake input to the second water inlet (16) intensity for 1 minute of stirring and vibration, stirring for 15 minutes by the second, third and fourth adjustable agitators (22, 23, 24), transferred to the sedimentation section (4) for 35 minutes of sedimentation; into the filtration section The water in (5) is discharged from the fifth water outlet (33) after passing through the filter layer (34).

Description

A kind of ozone preoxidation water treatment method

technical field

The invention relates to the technical field of water treatment, in particular to the technical field of purifying slightly polluted drinking water sources, in particular to an ozone pre-oxidation water treatment method.

Background technique

In recent years, due to the discharge of a large amount of domestic sewage, industrial wastewater, and agricultural, fishery and animal husbandry water, most water bodies have been polluted to varying degrees, which has seriously affected urban water supply. Due to the discharge of industrial sewage, the increase in the use of agricultural chemical fertilizers, especially the extensive application of fishery feeds, has caused a large loss of nitrogen and phosphorus nutrients. The degree of eutrophication of lakes is becoming more and more serious, which has become a prominent environmental pollution problem. The lake surface around the water intake of the city is surrounded by a large amount of algae, which directly deteriorates the water quality of the tap water that people depend on for survival. According to the survey, more than 90% of the drinking water sources in 430 cities in my country are polluted, leading to eutrophication of water bodies, and the most obvious feature of eutrophication is the overgrowth of algae, which has a great impact on water supply projects.

There are two types of water treatment in the prior art, physical methods and chemical methods. Among them, physical methods such as filtration and separation cannot purify soluble organic matter in water, etc. Chemical methods such as water sources are usually disinfected with chlorine, but the pollution of water sources After chlorine disinfection, carcinogenic chlorinated organic compounds (THM) such as chloroform, bromodichloromethane, and carbon tetrachloride will be produced, which will cause secondary pollution.

In addition, in addition to dissolved organic matter, there are many kinds of particulate matter in water, such as algae, diatomaceous earth, organic particles, etc., which are the main structures that constitute microcolloids and turbidity. Sand filtration is a key step in the removal of particulate matter in the drinking water treatment process, especially when surface water is used as the water source. However, filter blockage often occurs in water purification plants. Many studies have found that algae is the culprit of filter clogging, and even some large algae will greatly shorten the operation cycle of the filter, which brings severe challenges to the operation of the water plant. Although other large algae can also affect the filtration process, diatoms are the main algal species that cause filter blockage. For example, filamentous diatoms shorten the filter cycle from 30 hours to 8 hours, and Synedra The filter operation cycle was shortened from 35 hours to 3.5 hours.

In the prior art, the technologies for sterilizing algae and inhibiting algal blooms mainly include: 1) filter collection, 2) ultrasonic technology, 3) high-pressure algae killing, 4) biological treatment, 5) ecological treatment and 6) oxidation removal algae etc. Among them, the chemical oxidation method is the most popular, and there are many chemical oxidants used for sterilization and algae removal, such as liquid chlorine, ozone, chlorine dioxide, sodium hypochlorite, etc. Although liquid chlorine can kill algal cells, it cannot decompose algal cell corpses and algal toxins, and produce disinfection by-products such as trihalomethanes and halogenated hydrocarbons, which are harmful to humans and the environment, and have chlorine and fishy odors. Therefore, although it is cheap, it should be used with caution. Ozone acts fast and does not have the effect of inhibiting algal blooms. After a period of algae killing, the algal cells in it start to grow again. Chlorine dioxide is difficult to solve the problem that a large number of algae die and deposit on the bottom of the water and are decomposed by microorganisms to consume dissolved oxygen in the water and cause water deterioration. The bactericidal and algae-removing effect of sodium hypochlorite is lower than that of chlorine dioxide, and its biocidal ability decreases significantly with the increase of pH value. Therefore, it has not been widely used at home and abroad at present. Such as ultrasonic algae removal technology, ozone and potassium permanganate combined algae removal technology, double field algae removal sterilizer and so on. The physical method is time-consuming and labor-intensive, and the efficiency is very low; although the chemical method is quick, if the dosage is not well controlled, it is easy to cause secondary pollution; the conventional biological method has large investment, difficult operation, low algae removal efficiency, and is not suitable for large-scale Waters governance. A small amount or traces of algae-containing tap water cannot meet the national standards for domestic water and drinking water.

Therefore, in this field, there is a need for a kind of water treatment equipment that can not only remove impurities such as particles in water, organic matter including algae, etc., so that the water quality can meet the drinking water standard, and it will not shorten the operation period of the water treatment equipment, and can quickly and efficiently carry out water treatment.

Compared with the prior art, the water treatment equipment and method provided by the invention have the following beneficial effects:

1) The present invention adopts ozone pre-oxidation reaction part, mixing part, coagulation part, precipitation part and filtering part to jointly purify and remove algae, avoiding problems such as secondary pollution produced by chemical methods in the prior art, and avoiding the treatment of physical methods Long time, poor purification effect and other problems, also avoid the shortcoming of the single use of ozone to suppress the shortcoming, effectively inhibit algae regeneration, and prevent water blooms.

2) The present invention adjusts the amount of ozone through the electronic control unit to control the oxidation effect, and the ozone oxidation, coagulation, and filtration produce a multiplication effect, and the combination of ultrasonic vibration and agitator agitation promotes coagulation and crushing, and multi-layer different materials Technical measures such as filtering from multiple dimensions by the filter layer significantly improve the purification effect of the water treatment of the present invention.

3) The present invention can complete the water treatment of a batch of raw water to be treated in a short period of less than 1 hour, and the method of the present invention will not cause long-term operation due to algae and other reasons. Therefore, the method of the present invention It can efficiently and long-term carry out treatment with remarkable water purification effect, saving operating costs.

Contents of the invention

The invention provides an ozone pre-oxidation water treatment method, which comprises the following steps.

In the first step, in the ozone pre-oxidation reaction part with the first water inlet and the first water outlet, which includes an ozone generator, an ozone diffuser and an electronic control unit, the raw water to be treated input from the first water inlet passes through The fluid channel equipped with an ozone diffuser is sent to the first water outlet, and the air guide pipe with an air inlet solenoid valve transmits the ozone generated by the ozone generator at the bottom of the ozone pre-oxidation reaction part to the ozone with titanium plate micropores. For the diffuser, the electronic control unit controls the water intake of the first water inlet and the ozone output of the ozone diffuser, so that the water with an ozone concentration in the range of 0.8 to 0.9 mg per liter reacts with the ozone therein for 5 minutes.

In the second step, in the mixing part with the second water inlet and the second water outlet, it includes a polyaluminum chloride solution input port located on its upper part, a first adjustable agitator hanging down from the top of the mixing part And the ultrasonic vibration array located at its lower part, the oxidized water from the first water outlet passes through the second water inlet and the polyaluminum chloride solution enters the mixing part through the polyaluminum chloride solution input port, and the electronic control unit according to the input to the first The water intake of the second water inlet is controlled by the first adjustable stirrer stirring and the vibration intensity of the ultrasonic vibration array to stir and vibrate the water and polyaluminum chloride solution contained in the mixing part for 1 minute.

In the third step, in the condensing part including the third water inlet at its bottom, the second, third and fourth adjustable agitators hanging from its top and the third water outlet outputting water from its upper part, from the first The water from the second water outlet passes through the third water inlet and enters the coagulation part to be stirred by the second, third and fourth adjustable mixers for 15 minutes. Three, and the fourth adjustable speed of the mixer, wherein the speed of the first adjustable mixer is greater than the speed of the second adjustable mixer, the speed of the second adjustable mixer is greater than the speed of the third adjustable mixer, the third adjustable mixer The rotational speed is greater than the rotational speed of the fourth adjustable mixer.

In the fourth step, in the settling part including the fourth water inlet on one side of the upper part and the fourth water outlet on the other side, the water passing through the condensation part is sent from the third water outlet to the sedimentation part through the fourth water inlet Parts were subjected to precipitation for 35 minutes.

In the fifth step, in the filtering part including the fifth water inlet on the upper part and the fifth water outlet on the bottom, the water entering the filtering part passes through the thickness of the particle diameter from top to bottom in order of 4-8 mm Coarse sand layer of 0.2 meters, activated carbon layer with particle size of 0.8-1.5 mm and thickness of 0.4 m, quartz sand layer with particle size of 0.9-1.4 mm and thickness of 0.7 m and filter layer of micron reverse osmosis membrane layer Discharge from the fifth water outlet.

The ozone pre-oxidation water treatment equipment of the present invention can significantly improve the characterization indicators DOC, COD _Mn , UV as the evaluation of the removal effect of organic pollutants through the organic combination of ozone treatment, stirring, ultrasonic vibration, coagulation and precipitation, and filtration of water. ₂₅₄ and other indicators to improve the purification effect of organic matter and particles in water. Among them, DOC is the total amount of dissolved organic carbon in water, COD _Mn is the sum of various organic substances that can be oxidized by potassium permanganate under specific conditions, and UV ₂₅₄ represents humic acids with unsaturated bonds, An organic compound with characteristic absorption at 254nm. These three indicators are the most commonly used indicators to characterize the content of organic pollutants in water bodies. Turbidity and particle content of different particle sizes characterize the indicators of particle residue in water bodies. The invention can significantly improve the effect of removing water particles.

In the ozone pre-oxidation part, first, an appropriate concentration of ozone oxidizes the UV ₂₅₄ organic matter and removes it by filtration; second, for the COD _Mn organic matter, an appropriate concentration of ozone makes it polymerize into a high polymer, which improves the efficiency of the mixing part and the condensation part. The coagulation effect of ozone has a good coagulation aiding effect; third, the appropriate concentration of ozone oxidation changes the pH value of water, thereby increasing the coagulation efficiency and improving the precipitation effect; fourth, the appropriate concentration of ozone can The biofilm is formed during the filtration process, and the biofilm prolongs the operation period of the sand filter and improves the removal rate of particulate matter and turbidity. In addition, the biofilm may also play a certain role in the decomposition and removal of organic matter, thereby improving the filtration effect. The present invention The turbidity of the water processed is far lower than the turbidity of the water processed by the prior art, that is to say that the operating load of the equipment of the present invention has been significantly improved; the 5th, for DOC organic matter such as diatoms, due to diatoms in It is difficult to remove the mixed sedimentation stage, which directly leads to a large amount of diatoms entering the filter part. Diatoms with larger particle size cannot be filtered into the pores of the filter part of the filler, but are blocked on the surface by the filter material, which quickly blocks the filtration of the filter part. The ozone pre-oxidation part of the present invention destroys the algae cells into small particles, so that after entering the filtration process section, the particles with smaller particle sizes can slowly transfer to the lower layer through the pores of the filter part, thereby increasing the effective filtration thickness of the filter part , thereby improving the filtering effect of the filtering part. Therefore, there is a cross-action of various mechanisms in the mixing part, coagulation part, precipitation part and filtration part of ozone oxidation to promote the purification of organic matter.

In the mixing part, the organic matter and particles in the water can be further pulverized through the controllable rapid stirring and ultrasonic oscillation, and it is helpful for the thorough mixing of the ozonized water and the coagulation solution, which is helpful for the coagulation in the next step. The organic combination of ultrasonic oscillation and rapid stirring can significantly improve the effect on medium and large organic matter and particles, and further improve the coagulation and precipitation in the next step.

In the coagulation part, the water and the coagulation solution are stirred by the mixers with different rotation speeds, which can improve the coagulation effect and help to improve the purification effect. Through the above-mentioned effects, most of the impurities treated by the present invention are deposited in the precipitation part, which greatly reduces the turbidity.

In the filtration part, combined with ozone oxidation, agitation and ultrasonic oscillation, organic matter, particles and other impurities in the water pass through multi-layer sand filtration, activated carbon filtration and reverse osmosis membrane filtration, and the raw water is treated into qualified drinking water.

Preferably, when the ozone amount data is lower than the ozone amount set value, the electric control unit increases the ozone amount by controlling the solenoid valve; when the ozone amount data is greater than the ozone amount set value, the electric control unit reduces the ozone amount by controlling the solenoid valve .

Preferably, the reverse osmosis membrane layer is an aromatic polyamide membrane.

Preferably, the ORP sensor sends the detected ORP value to the electric control unit; the electric control unit compares the measured ORP value with the set range, and when the measured ORP value is less than the minimum value of the set range, the electric The control unit controls the ozone generator to increase the supply of ozone or controls the water inlet solenoid valve of the first water inlet to reduce the water inlet of the first water inlet, so that the ORP value rises to the set range; when the measured ORP value is greater than the set When the maximum value of the specified range is reached, the electronic control unit controls the ozone generator to reduce the supply of ozone or controls the water inlet solenoid valve of the first water inlet to increase the water inlet of the first water inlet, so that the ORP value falls within the set range.

Preferably, the ozone pre-oxidation reaction part is a cylinder made of stainless steel with a wall thickness of 3mm, a diameter of 0.13m and a height of 2m.

Preferably, the mixing part is a cylinder made of stainless steel with a wall thickness of 3 mm, a diameter of 0.11 m and a height of 0.4 m.

Preferably, the inclination angle of the inclined plate is 45 degrees to 60 degrees.

Preferably, the micropores of the titanium plate are a plurality of micron-sized through holes evenly distributed on the curved plate made of the titanium metal plate.

Preferably, the rotation speed of the first mixer is 300 rpm, the rotation speed of the second mixer is 200 rpm, the rotation speed of the third mixer is 150 rpm, and the rotation speed of the fourth mixer is 100 rpm. The above settings can ensure that the water is fully mixed and crushed, which is beneficial to optimize the oxidation, coagulation, crushing, sedimentation and filtration effects.

Preferably, the polyaluminum chloride solution can be replaced with one or more of aluminum sulfate, polyaluminum sulfate, and aluminum chloride solution.

According to the method of the present invention, indicators such as UV ₂₅₄ , COD _Mn , DOC, turbidity, and the number of particles of different particle sizes can be greatly reduced. Compared with the prior art, the purification effect can be significantly improved and a batch can be completed within 1 hour. Secondary water treatment, efficient operation and low operating costs.

Preferably, the electronic control unit is a programmable control unit.

Preferably, the electronic control unit controls the predetermined range of ozone concentration to be 0.85 milligrams per liter.

Preferably, the ultrasonic vibration array is a piezoelectric ultrasonic transducer or a magnetostrictive ultrasonic transducer.

Description of drawings

Fig. 1 is the structural representation according to ozone preoxidation water treatment method of the present invention;

Fig. 2 is the structural representation of the ozone preoxidation reaction part according to the ozone preoxidation water treatment method of the present invention;

Fig. 3 is the structural representation of the filtering part according to the ozone preoxidation water treatment method of the present invention;

Fig. 4 is according to the method of the present invention and prior art respectively carry out the UV ₂₅₄ change schematic diagram of long-term water treatment;

Fig. 5 is the COD _Mn content change schematic diagram that carries out long-term water treatment respectively according to the method of the present invention and prior art;

Fig. 6 is a schematic diagram of changes in DOC content of long-term water treatment according to the method of the present invention and the prior art;

Fig. 7 is a schematic diagram of the turbidity change of the long-term water treatment of water according to the method of the present invention and the prior art;

Fig. 8 is according to the water treatment method of the present invention and prior art respectively carry out the UV ₂₅₄ change schematic diagram of the water treatment of different ozone concentrations;

Fig. 9 is the change schematic diagram of COD _Mn that water is carried out to different ozone concentration water treatment respectively according to water treatment method of the present invention and prior art;

Fig. 10 is a schematic diagram of changes in DOC of water treated with different ozone concentrations using the water treatment method of the present invention and the prior art;

Fig. 11 (a) is a schematic diagram of the content change of particles less than 2 microns in size for water treatment according to the method of the present invention and the prior art;

Fig. 11 (b) is a schematic diagram of the particle content change of 2 microns to 5 microns in particle size according to the method of the present invention and the prior art respectively;

Fig. 11 (c) is a schematic diagram of the variation of particle content of 5 microns to 15 microns in particle size according to the method of the present invention and the prior art respectively;

Fig. 11(d) is a schematic diagram showing the change of the content of particles with a particle size larger than 15 microns after water treatment according to the method of the present invention and the prior art.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

According to an embodiment of the present invention, as shown in FIG. 1 , a schematic structural diagram of the ozone pre-oxidation water treatment method according to the present invention is shown. In the first step, refer to the structural diagram of the ozone pre-oxidation reaction part of the ozone pre-oxidation water treatment method according to the present invention as shown in FIG. 2 . In the ozone pre-oxidation reaction part 1 with the first water inlet 6 and the first water outlet 7, it includes an ozone generator 8, an ozone diffuser 9 and an electric control unit 10, the raw water to be treated imported from the first water inlet 6 Delivered to the first water outlet 7 by the fluid channel 11 that is provided with the ozone diffuser 9, the air guide pipe 13 that has the air inlet electromagnetic valve 12 will be arranged on the ozone generator 8 that the ozone pre-oxidation reaction part 1 bottom produces and transmit to The ozone diffuser 9 with titanium plate microhole 39, the electric control unit 10 controls the water intake of the first water inlet 6 and the ozone amount output by the ozone diffuser 9, so that the ozone concentration is in the range of 0.8 to 0.9 mg per liter The water reacts with the ozone therein for 5 minutes; the ORP sensor 15 installed at the first water outlet 7 detects the oxidized water passing through the first water outlet 7 and sends the ORP data to the electronic control unit 10 . Preferably, the microholes 39 of the titanium plate can inject ozone regularly and quantitatively.

The ozone diffuser 9 with the built-in gas flow meter 14 which can set the intake flow rate oxidizes the raw water to be treated from the first water inlet 6 in the fluid channel 11 . The gas flow meter 14 sends the gas flow data to the electronic control unit 10 . An ORP (Oxidation-Reduction Potential) sensor 15 provided at the first water outlet 7 detects the oxidized water passing through the first water outlet 7 and sends the ORP data to the electronic control unit 10 . The ORP sensor 15 is used to detect the oxidation-reduction potential of the oxidized aquaculture water.

In the second step, as shown in Figure 1, in the mixing part 2 with the second water inlet 16 and the second water outlet 17, it comprises the polyaluminum chloride solution inlet 18 that is located at its top, from mixing The first adjustable agitator 19 hanging from the top of the part 2 and the ultrasonic vibration array 20 located below it, the oxidized water from the first water outlet 7 passes through the second water inlet 16 and the polyaluminum chloride solution is polymerized and chlorinated The aluminum solution input port 18 is input into the mixing part 2, and the electric control unit 10 controls the first adjustable stirrer 19 stirring and the vibration intensity of the ultrasonic vibration array 20 according to the water inflow input into the second water inlet 16 to the water contained in the mixing part 2 and the polymerization The aluminum chloride solution was stirred and shaken for 1 minute. Stirring by the first adjustable stirrer 19 while superimposing the vibration of the ultrasonic vibration array 20 can further fully mix and break a part of larger-sized organic matter such as diatoms to reduce their size.

In the third step, including the third water inlet 21 at its bottom, the second, third and fourth adjustable mixers 22, 23, 24 hanging from its top and the third water outlet 39 outputting water from its upper part In the coagulation part 3, the water from the second water outlet 17 enters the coagulation part 3 through the third water inlet 21 and is stirred for 15 minutes by the second, third and fourth adjustable mixers 22, 23, 24, and the electric control unit 10 according to The amount of water input to the third water inlet 21 controls the second, third, and fourth adjustable agitators 22, 23, 24 of the coagulation part 3. The rotational speed of the first adjustable agitator 19 is greater than that of the second adjustable agitator. The rotational speed of the agitator 22, the rotational speed of the second adjustable agitator 22 is greater than the rotational speed of the third adjustable agitator 23, the rotational speed of the third adjustable agitator 23 is greater than the rotational speed of the fourth adjustable agitator 24.

Between the second and third adjustable mixers 22 and 23 and between the third and fourth adjustable mixers 23 and 24, first and second partitions 25 and 26 are arranged, and partition 25 connects the second adjustable mixer 22 and the second adjustable mixer. The corresponding mixing ranges of the three adjustable mixers 23 are spaced apart, which is conducive to further stirring and coagulation of impurities such as organic matter and particles in the water. The stirring range is spaced apart, which is conducive to further stirring and agglomeration of impurities such as organic matter and particles in the water.

In the fourth step, in the settling part 4 including the fourth water inlet 27 on one side of the upper part and the fourth water outlet 28 on the other side, the water passing through the condensation part 3 passes through the fourth water outlet 39 from the third water outlet 39. The water inlet 27 was sent to the settling section 4 for 35 minutes of settling. The two sloping plates 29 located at the bottom of the sedimentation part 4 are tilted over the center and extend downward at a distance of 10 mm from each other. The downward extension of the sloping plates 29 is sealed by a detachable seal 30 to form an accommodating groove 31 . The precipitated impurities fall into the holding tank 31 along the inclined plate under the action of gravity, which is beneficial to the sedimentation effect of the settling part, wherein, when the holding tank 31 is full, it can be emptied by the removable seal 30 and sealed again for The precipitated fraction was precipitated again.

In the 5th step, as shown in Figure 3, according to the structural representation of the filter part of the ozone pre-oxidation water treatment equipment of the present invention, comprise the fifth water inlet 32 that is located at the top and the 5th water outlet 33 that are located at the bottom In the filtering part 5, the water entering the filtering part 5 passes through successively from top to bottom a coarse sand layer 35 with a particle diameter of 4-8 millimeters and a thickness of 0.2 meters, and an activated carbon layer with a particle diameter of 0.8-1.5 millimeters and a thickness of 0.4 meters. 36. After the filter layer 34 of the quartz sand layer 37 with a particle size of 0.9-1.4 mm and a thickness of 0.7 m and a micron-sized reverse osmosis membrane layer 38, it is discharged from the fifth water outlet 33. The material of the filter layer is stacked from top to bottom in order of particle size from large to small. According to different materials, its thickness is effectively set adaptively, which can filter micron-level impurities and further improve the water purification effect of this equipment.

The electronic control unit 10 can control the intake solenoid valve 12 according to the gas flow data and ORP data, and the electronic control unit 10 can adjust the speed of the first, second, third and fourth adjustable mixers 19, 22, 23, 24 and ultrasonic The vibration intensity of the vibration array 20. The electric control unit can adjust the water intake and processing time of each part of the device according to the stored optimal setting value or setting range. More preferably, the electric control unit of the present invention is a programmable electric control unit.

According to the water treatment method provided by the present invention, the amount of ozone is adjusted by adjusting the electronic control unit 10 to control the oxidation effect, and the ozone oxidation, coagulation, and filtration produce a multiplication effect, and the combination of ultrasonic vibration and agitator agitation promotes coagulation and crushing Effect, multi-layer filter layers of different materials filter from multiple dimensions and other technical means significantly improve the _{purification effect} of the water treatment of the present invention. The treatment was compared with the water treatment of the prior art.

DOC is the total amount of dissolved organic carbon in water, COD _Mn is the sum of various organic compounds that can be oxidized by potassium permanganate under certain conditions, and UV ₂₅₄ represents humic acids that have unsaturated bonds and are at 254nm Organic matter with characteristic absorption. These three indicators are the most commonly used indicators to characterize the content of organic pollutants in water bodies. There is a certain correlation between the three indicators, and because the meanings and analysis methods of the three indicators are different, the combination of the three indicators can reflect the removal of organic matter more comprehensively. Therefore, DOC, COD _Mn and UV ₂₅₄ are used as the characterization indicators to evaluate the removal effect of organic pollutants, while turbidity is an indicator to evaluate the particle content in water.

As shown in Figure 4, adopt the method of the present invention and prior art respectively to carry out the UV ₂₅₄ change schematic diagram of long-term water treatment, wherein abscissa is water treatment time, and the unit is number of days, and ordinate is UV ₂₅₄ value, and unit is cm- 1, the square connection line represents the UV ₂₅₄ value change curve of the raw water to be treated, the triangle connection line represents the UV ₂₅₄ value change curve of the water treated in the prior art, and the circle connection line represents the UV ₂₅₄ value change curve of the water treated in the present invention curve. As shown in the figure, in the long-term running process, the average removal rate of UV ₂₅₄ processed by the method of the present invention is 70%, and the average removal rate of UV ₂₅₄ processed by the prior art is 33%, and the present invention can remove corrosion better. The organic matter of phytic acid has a better purification effect of purifying water quality.

As shown in Figure 5, adopt the method of the present invention and the prior art to carry out the COD _Mn content change schematic diagram of long-term water treatment respectively, wherein abscissa is water treatment time, and the unit is number of days, and ordinate is COD _Mn content, and unit is milligram Per liter, the line connecting squares represents the COD _Mn content variation curve of untreated raw water, the triangle connecting line represents the COD _Mn content variation curve of the water after the prior art treatment, and the circle connection represents the COD _Mn content of the water after the treatment of the present invention Curve. As shown in the figure, in the long-term operation process, the content of COD _Mn treated by the method of the present invention is lower than that of the prior _art , can more effectively remove organic matter in raw water, and has better water purification. Enhanced effect.

As shown in Figure 6, adopt the method of the present invention and the prior art to carry out the schematic diagram of the change of DOC content of long-term water treatment respectively, wherein the abscissa is the water treatment time, the unit is the number of days, and the ordinate is the DOC removal rate, the unit is a percentage, The line connecting the solid points represents the change curve of the DOC removal rate of the water treated in the prior art, and the line connecting the hollow points represents the change curve of the DOC removal rate of the water treated in the present invention. As shown in the figure, in the long-term operation process, the DOC removal rate treated by the method of the present invention can be increased by about 10% compared with that of the prior art, and can more effectively remove organic matter in raw water, and has better purified water quality significant strengthening effect.

Figure 7 is a schematic diagram of the turbidity changes of the long-term water treatment of water using the method of the present invention and the prior art, wherein the abscissa is the water treatment time, the unit is days, and the ordinate is the turbidity (NTU), and the squares are connected The line represents the turbidity change curve of untreated raw water, the triangle connecting line represents the turbidity change curve of the water treated in the prior art, and the circle connecting line represents the turbidity change curve of the water treated in the present invention. As shown in the figure, during long-term operation, the turbidity of the effluent in the prior art is about 0.2 NTU, while the turbidity of the effluent of the present invention is lower than 0.1 NTU in the normal filtration process. The average turbidity treated by the method of the invention is lower than that of the prior art, can remove particles in raw water more stably and effectively, and has a better effect of purifying water quality.

According to a preferred embodiment of the present invention, when the gas flow data is lower than the gas flow set value, the electronic control unit 10 increases the gas flow by controlling the intake solenoid valve 12; when the gas flow data is greater than the gas flow set value, the electronic control unit The unit 10 reduces the air flow by controlling the intake solenoid valve 12 .

According to a preferred embodiment of the present invention, the reverse osmosis membrane layer 38 is an aromatic polyamide membrane.

According to a preferred embodiment of the present invention, wherein, the ORP sensor 15 sends the detected ORP value to the electric control unit 10; the electric control unit 10 compares the measured ORP value with the set range, when the measured ORP value When it is less than the minimum value of the set range, the electronic control unit 10 controls the ozone generator 8 to increase the supply of ozone or controls the water inlet solenoid valve of the first water inlet 6 to reduce the water inlet of the first water inlet, so that the ORP value rises to Within the setting range; when the measured ORP value is greater than the maximum value of the setting range, the electronic control unit 10 controls the ozone generator 8 to reduce the supply of ozone or controls the water inlet solenoid valve of the first water inlet 6 to increase the first water inlet. The water intake of water port 6, so that the ORP value falls within the set range.

According to a preferred embodiment of the present invention, the ozone pre-oxidation reaction part 1 is a cylinder made of stainless steel with a wall thickness of 3mm, a diameter of 0.13m and a height of 2m.

According to a preferred embodiment of the invention, the mixing part 2 is a cylinder made of stainless steel with a wall thickness of 3 mm, a diameter of 0.11 m and a height of 0.4 m.

According to a preferred embodiment of the present invention, the inclination angle of the sloping plate 29 is 45 degrees to 60 degrees.

According to a preferred embodiment of the present invention, the titanium plate microholes 39 are a plurality of 1-2 micron through holes evenly distributed on the curved plate made of titanium metal plate.

According to a preferred embodiment of the present invention, the rotating speed of the first adjustable mixer 19 is 300 rpm, the rotating speed of the second adjustable mixer 22 is 200 rpm, the rotating speed of the third adjustable mixer 23 is 150 rpm, The rotational speed of the fourth adjustable mixer 24 is 100 rpm.

According to a preferred embodiment of the present invention, the polyaluminum chloride solution can be replaced with one or more of aluminum sulfate, polyaluminum sulfate, and aluminum chloride solution.

The water treatment method of the present invention uses the electronic control unit to accurately control the multiple treatment parts within the predetermined value and predetermined range to achieve the optimal water treatment effect. For example, if the ozone concentration is not within the predetermined range, it will not be able to Fully oxidized, if the concentration is too high, it will affect the effect of the coagulation part, and it will also have an adverse effect on the biofilm produced between the layers of the filter part. In this method, the electric control unit can adjust the stirring speed and ultrasonic vibration of the first adjustable mixer Improper control of the vibration intensity of the array 20 is unfavorable for stirring and breaking of impurities in water, and further unfavorable for coagulation. If the electronic control unit improperly controls the rotational speeds of the second, third and fourth adjustable mixers 22, 23 and 24, it will be unfavorable for stirring and crushing of impurities in water, and further unfavorable for sedimentation and filtration.

First of all, from the perspective of organic matter removal, Fig. 8 is a schematic diagram of UV ₂₅₄ variation of water treatment with different ozone concentrations using the water treatment method of the present invention and the prior art, where the abscissa is the ozone concentration, and the unit is mg per liter , the ordinate is the UV ₂₅₄ removal rate, and the unit is %, the solid connection line represents the UV ₂₅₄ removal rate change curve of the water after prior art treatment, and the hollow connection line represents the UV ₂₅₄ removal rate change curve of the method of the present invention. As shown in the figure, the method provided by the present invention has a total removal rate of 50.5% to 73.2% for UV ₂₅₄ , which is 28.3% to 50.9% higher than the 22.3% of the prior art. The total removal effect of UV ₂₅₄ is the best.

Fig. 9 is the change schematic diagram of the permanganate index (COD _Mn ) that adopts water treatment method of the present invention and prior art to carry out different ozone concentration water treatment respectively to water, and wherein abscissa is ozone concentration, unit is milligram per liter, vertical The coordinates are the COD _Mn removal rate, and the unit is %. The solid connected line represents the COD _Mn removal rate change curve of the water treated in the prior art, and the hollow connected line represents the COD _Mn removal rate change curve processed by the method of the present invention. As shown in the figure, the method provided by the present invention can effectively reduce the value of COD _Mn , and the total removal rate of COD _Mn is 26.6%～63.0%, which is 0～36.4% higher than the average removal rate of 26.6% in the prior art, wherein, When the ozone concentration is 0.8 mg per liter, the total removal effect of COD _Mn is the best.

Fig. 10 is a schematic diagram of the change of DOC of water treated with different ozone concentrations using the water treatment method of the present invention and the prior art, wherein the abscissa is the ozone concentration in milligrams per liter, and the ordinate is the DOC removal rate in units of %, the solid line represents the change curve of DOC removal rate of water treated in the prior art, and the hollow line represents the change curve of DOC removal rate treated by the method of the present invention. As shown in the figure, the method provided by the invention can effectively reduce the value of DOC, and the average removal rate of DOC is 28%, which is 11% higher than the 17% of the prior art, wherein, when the ozone concentration of 0.9 mg per liter, the The total removal effect of removing DOC is the best.

To sum up, the ozone concentration in the water treatment method of the present invention is 0.8-0.9 mg per liter, which has a good strengthening effect on the removal of organic matter and can also control the turbidity well. Achieve optimal purification effect.

Secondly, from the point of view of particle removal, the purification effect of the present invention on particles is significantly better than that of the prior art, see Fig. 11 for the particles of different particle sizes that are treated with water by the method of the present invention and the prior art respectively Schematic diagram of content change. Wherein the abscissa is the water treatment time, the unit is hour, and the ordinate is the particle content, the unit is the number of particles per milliliter, and what Fig. 11a shows is the change graph of the particle content less than 2 microns, wherein, the curve above represents the prior art The curve of the particle content change, the curve below represents the particle content change curve of the water treatment method of the present invention, what Fig. 11b shows is the particle content change graph of 2 microns to 5 microns, wherein, the curve above represents the particle of the prior art Content change curve, the lower curve represents the particle content change curve of the water treatment method of the present invention, and what Fig. 11c shows is the particle content change graph of 5 microns to 15 microns, wherein, the upper curve represents the particle content change of the prior art Curve, the lower curve represents the particle content change curve of the water treatment method of the present invention, and what Fig. 11d shows is the particle content change graph larger than 15 microns, wherein, the upper curve represents the particle content change curve of the prior art, and the lower one The curve represents the change curve of the particle content of the water treatment method of the present invention. It can be seen from the figure that compared with the prior art, the water treatment method of the present invention can significantly improve the removal effect of particles larger than 2 microns in water, and further improve the water purification ability.

According to another preferred embodiment of the present invention, the electronic control unit 10 controls the predetermined range of ozone concentration to be 0.85 milligrams per liter.

According to another preferred embodiment of the present invention, the ultrasonic vibration array 20 is a piezoelectric ultrasonic transducer or a magnetostrictive ultrasonic transducer.

It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principle of the present invention, and not to limit the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention shall fall within the protection scope of the present invention. Furthermore, it is intended that the appended claims of the present invention embrace all changes and modifications that come within the scope and metesques of the appended claims, or equivalents of such scope and metes and bounds.

Claims (12)

1. an ozone pre-oxidation method for treating water, it comprises the following steps:

nullIn the first step，In ozone pre-oxidation reactive moieties (1) with the first water inlet (6) and the first outlet (7)，It includes ozonator (8)、Ozone diffuser (9) and ECU (10)，The pending former water inputted from the first water inlet (6) is sent to the first outlet (7) by being provided with the fluid passage (11) of ozone diffuser (9)，Airway (13) with air inlet electromagnetic valve (12) will be located at the ozone delivery that produces of ozonator (8) of ozone pre-oxidation reactive moieties (1) bottom to the ozone diffuser (9) with titanium plate micropore (39)，The ozone amount that ECU (10) controls the inflow of the first water inlet (6) and ozone diffuser (9) exports，Ozone concentration is made to be in the water in the range of 0.8 to 0.9 milligrams per liter and ozone oxidation reaction therein 5 minutes；

nullIn the second step，In the mixing portion (2) with the second water inlet (16) and the second outlet (17)，It includes the polymeric aluminum chlorides solution input port (18) set at an upper portion thereof、The the first scalable blender (19) hung down from the top of mixing portion (2) and the ultrasonic activation array (20) being located at its underpart，Mixing portion (2) is inputted through the second water inlet (16) and polymeric aluminum chlorides solution aggregated liquor alumini chloridi input port (18) from the water after the oxidation of the first outlet (7)，ECU (10) controls water that mixing portion (2) accommodates by the oscillation intensity of the first scalable blender (19) stirring and ultrasonic activation array (20) and stirring and vibration that polymeric aluminum chlorides solution carries out continuing 1 minute according to the inflow being input to the second water inlet (16)；

nullIn third step，Including the 3rd water inlet (21) being positioned at bottom it、Second hung down from its top、Third and fourth scalable blender (22、23、24) and from it in the cohesion part (3) of the 3rd outlet of portion's output water，Water from the second outlet (17) condenses part (3) through the 3rd water inlet (21) input，By second、Third and fourth scalable blender (22、23、24) stirring 15 minutes，ECU (10) controls the second of cohesion part (3) according to the inflow being input to the 3rd water inlet (21)、3rd、With the 4th scalable blender (22、23、24) rotating speed，Wherein，The rotating speed of the first scalable blender (19) is more than the rotating speed of the second scalable blender (22)，The rotating speed of the second scalable blender (22) is more than the rotating speed of the 3rd scalable blender (23)，The rotating speed of the 3rd scalable blender (23) is more than the rotating speed of the 4th scalable blender (24)；In the 4th step, in sediment fraction (4) including the 4th water inlet (27) of side to its upper, position and the 4th outlet (28) of opposite side, the water through cohesion part (3) is sent to, through the 4th water inlet (27), the precipitation that sediment fraction (4) is carried out 35 minutes from the 3rd outlet；

In the 5th step, including in the filtration fraction (5) being located at the 5th water inlet (32) on top and the 5th outlet (33) that is located at bottom, enter the water of filtration fraction (5) by be followed successively by from top to bottom the coarse sands layer (35) of thickness 0.2 meter that particle diameter is 4-8 millimeter, particle diameter the active carbon layer that thickness is 0.4 meter (36) of 0.8-1.5 millimeter, particle diameter after the filter course (34) of the quartz sand layer (37) that 0.9-1.4 mm of thickness is 0.7 meter and micron-sized reverse osmosis membrane layer (38) from the 5th outlet (33) discharge.

Method the most according to claim 1, wherein, when ozone amount data are less than ozone amount setting value, ECU (10) increases ozone amount by controlling air inlet electromagnetic valve (12)；When ozone amount data are more than ozone amount setting value, ECU (10) reduces throughput by controlling air inlet electromagnetic valve (12).

Method the most according to claim 1, wherein, reverse osmosis membrane layer (38) is aromatic polyamide film.

Method the most according to claim 1, wherein, the ORP sensor (15) being located at the first outlet (7) detects the water after the oxidation of the first outlet (7) and ORP data is sent ECU (10), the ORP numerical value recorded is compared by ECU (10) with set point, when the ORP numerical value recorded is less than the minima of set point, the entering water electromagnetic valve of ECU (10) control ozonator (8) increase ozone amount or control the first water inlet (6) reduces the inflow of the first water inlet, so that ORP numerically rises in set point；When the ORP numerical value recorded is more than the maximum of set point, the entering water electromagnetic valve of ECU (10) control ozonator (8) minimizing ozone amount or control the first water inlet (6) increases the inflow of the first water inlet (6), so that ORP numerical value is down in set point.

Method the most according to claim 1, wherein, ozone pre-oxidation reactive moieties (1) be the wall thickness that rustless steel is made be 3 millimeters, a diameter of 0.13 meter and cylinder that height is 2 meters.

Method the most according to claim 1, wherein, mixing portion (2) be the wall thickness that rustless steel is made be 3 millimeters, a diameter of 0.11 meter and cylinder that height is 0.4 meter.

Method the most according to claim 1, wherein, titanium plate micropore (39) is that the through hole of multiple 1-2 micron is evenly distributed on the curved slab that titanium panel is made.

Method the most according to claim 1, wherein, the rotating speed of the first scalable blender (19) be 300 turns every point, the rotating speed of the second scalable blender (22) be 200 turns every point, the rotating speed of the 3rd scalable blender (23) be the rotating speed of 150 turns every point and the 4th scalable blender (24) be 100 turns every point.

Method the most according to claim 1, wherein, polymeric aluminum chlorides solution replaces to one or several in aluminum sulfate, polyaluminium sulfate, liquor alumini chloridi.

Method the most according to claim 1, wherein, ECU (10) is programmable control unit.

11. methods according to claim 1, wherein, it is 0.85 milligrams per liter that ECU (10) controls ozone concentration.

12. methods according to claim 1, wherein, supersonic vibration array (20) is piezo-electric type ultrasonic transducer or magnetostriction type ultrasonic transducer.