Sewage purification device and method

Abstract

The application provides a sewage purification device and method. The sewage purification device comprises an automatic dosing device, a first plurality of hydroxyl generating devices, a flocculation tank, and a plurality of ion generating devices. The automatic dosing device injects corresponding medicaments for removing pollutants in water into sewage. The first plurality of hydroxyl generating devices are located upstream or downstream of the automatic dosing device and are in fluid communication with the automatic dosing device. The first plurality of hydroxyl generating devices comprise air ionization devices and negative ion generators which release electrons in operation to form free electrons and negative oxygen ions which are sent into received sewage to react with pollutants to be removed and the corresponding medicaments injected to generate precipitates and flocculants capable of precipitation by reaction or physical polarity adsorption. The flocculation tank is located downstream of the first plurality of hydroxyl generating devices and is in fluid communication with the first plurality of hydroxyl generating devices. The application comprehensively solves the problems of excessive hardness, alkalinity, turbidity and bacterial colony count of cooling circulating water and can also be used as an important process link for sewage purification.

Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of sewage treatment, water purification and water disinfection, and in particular to a sewage purification device and method. BACKGROUND

[0002] Current sewage purification methods, including biochemical method, oxidation method and membrane filtration treatment method, but the biochemical method occupies time, the oxidation method consumes energy, the membrane filtration method is difficult to handle the concentrated water intercepted by the membrane, etc., each has its own short board and problem; cooling circulating water treatment method, including dosing method, electrochemical method, electromagnetic method, but the dosing method depends on the time and quantity of pollution, water and medicine consumption is not conducive to equipment, the electrochemical method and the electromagnetic method are not ideal for the alkalinity, turbidity and bacteria treatment effect of water body, and the cooling circulating water is easy to scale and corrosion if the amount of bacteria is high, which also poses a threat to people's health, especially legionella.

[0003] Current municipal sewage treatment biochemical method relies on large scale, but for the lack of municipal pipe network, such as suburban subway stations, high-speed rail stations and rural sewage treatment, the biochemical method is neither economical nor effective. SUMMARY

[0004] The purpose of at least a preferred embodiment of the present invention is to solve some of the above-mentioned shortcomings. Additional or alternative purposes are to at least provide the public with useful options.

[0005] The present invention proposes a sewage purification device, comprising:

[0006] An automatic dosing device for injecting a corresponding medicament for removing pollutants in water into sewage;

[0007] A first plurality of hydroxyl generating devices upstream or downstream of the automatic dosing device and in fluid communication with the automatic dosing device, the first plurality of hydroxyl generating devices including air ionization devices, negative ion generators, releasing electrons in operation to form free electrons and negative oxygen ions, which are sent into the received sewage to react with the pollutants to be removed and the corresponding medicament injected for generating precipitates and precipitable flocculants in the sewage through reaction or through physical polar adsorption; and

[0008] A flocculation tank downstream of the first plurality of hydroxyl generating devices and in fluid communication with the first plurality of hydroxyl generating devices, whereby the pollutants, the corresponding medicament and the injected free electrons and negative oxygen ions in the flocculation tank react or physically polarize to generate precipitates and precipitable flocculants.

[0009] In an aspect, further comprising a second plurality of hydroxyl generating devices in circulation communication with the flocculation tank, water from the flocculation tank being recirculated through the second plurality of hydroxyl generating devices back to the flocculation tank, the second plurality of hydroxyl generating devices comprising air ionization devices, negative ion generators, in operation, emitting electrons to form free electrons and negative oxygen ions, the free electrons and negative oxygen ions being delivered into the sewage water in the flocculation tank to react with the pollutants in the water and the corresponding reagents injected to cause the pollutants in the sewage water that need to be removed to form precipitates and flocculates that can be precipitated through the reactions or through physical polar adsorption.

[0010] In an aspect, further comprising a hydroxyl disinfecting device downstream of and in fluid communication with the flocculation tank, the hydroxyl disinfecting device comprising:

[0011] a gas supply device configured to supply a gas;

[0012] a negative oxygen ion generating device configured to be in fluid connection with the gas supply device and the water supply device respectively, the negative oxygen ion generating device comprising a negative ion generator, the negative oxygen ion generating device being in fluid connection with the gas supply device to receive the gas from the gas supply device, the gas containing oxygen, the negative ion generator being configured to emit electrons to the received gas containing oxygen in operation to form negative oxygen ions in the gas, and the negative oxygen ions being delivered with the gas into the received water, the negative oxygen ions reacting with water molecules in the water to form hydroxyl ions;

[0013] an ozone generator in fluid connection with the water supply device and the gas supply device, the ozone generator being configured to receive the gas from the gas supply device, and to deliver ozone generated by the ozone generator into the gas to deliver the gas containing ozone into the received water.

[0014] In an aspect, the negative ion generator comprises an electron emitting pole extending from the negative ion generator and in contact with the gas from the gas supply device to emit electrons to the gas from the gas supply device.

[0015] In an aspect, the negative oxygen ion generating device further comprises a negative oxygen ion reaction chamber in fluid connection with the gas supply device to receive the gas from the gas supply device, the negative oxygen ion reaction chamber being connected with the negative ion generator to receive the electrons from the negative ion generator and to deliver the gas with the generated negative oxygen ions into the received water.

[0016] In one aspect, the gas with the negative oxygen ions and the gas with the ozone are delivered together into the received water after being mixed, or the gas with the negative oxygen ions and the gas with the ozone are delivered separately into the received water.

[0017] In one aspect, a flow stabilizing tank is further included, which is connected between the first plurality of hydroxyl generating devices and the flocculation tank to discharge the precipitates that are insoluble in water.

[0018] In one aspect, a back crystal pump is further included, which is connected between the flocculation tank and the second plurality of hydroxyl generating devices to send the precipitates and the flocculable flocs in the flocculation tank back to the front end of the second plurality of hydroxyl generating devices for recirculation.

[0019] The present application also proposes a sewage purification method using the sewage purification device as described above, which comprises:

[0020] injecting the reagent required for removing the pollutants into the sewage by the automatic reagent injection device;

[0021] generating free electrons and negative oxygen ions by the first plurality of hydroxyl generating devices or the first and second plurality of hydroxyl generating devices, and sending the free electrons and negative oxygen ions into the received sewage to react with the pollutants in the water and the added reagent, so that the pollutants in the sewage are generated into precipitates and flocculable flocs by reaction or by physical polar adsorption; and

[0022] discharging the precipitates and the precipitated flocs.

[0023] In one aspect, for the cooling circulating water and the treated reclaimed water that needs further disinfection, the method further comprises an extended sterilization and disinfection mode,

[0024] supplying a gas containing oxygen;

[0025] releasing electrons to the gas to form negative oxygen ions in the gas, and delivering the negative oxygen ions with the gas into the received treated sewage;

[0026] delivering the generated ozone into the gas to send the gas containing ozone into the received treated sewage or to send the gas containing ozone into the gas containing negative oxygen ions.

[0027] In summary, the device and method provided by the present application are suitable for sewage treatment and cooling circulating water treatment. The sewage treatment is most suitable for sewage treatment of small and medium water volume, sewage treatment in areas lacking municipal pipe network, and sewage treatment required for water reuse to achieve water saving. The present application provides a cooling circulating water treatment method and device which are far superior to the current method, and comprehensively solve the problems of excessive hardness, alkalinity, turbidity and bacterial count of cooling circulating water, achieve cost saving with less chemicals and large water saving without pollution. The device and method provided by the present application are also suitable for the application of directly supplementing cooling circulating water with treated sewage, to achieve more water saving and cost reduction. BRIEF DESCRIPTION OF DRAWINGS

[0028] The preferred forms of embodiments according to the present application will now be described, by way of example only, with reference to the accompanying drawings in which:

[0029] Figure 1 A schematic view of a sewage purification device according to a preferred embodiment of the present application is shown;

[0030] Figure 2 A schematic view of a hydroxyl generating device in a sewage purification device according to a preferred embodiment of the present application is shown;

[0031] Figure 3 A schematic view of a sewage purification device according to another preferred embodiment of the present application is shown;

[0032] Figure 4 A schematic view of a sewage purification device according to another preferred embodiment of the present application is shown;

[0033] Figure 5 A schematic view of a hydroxyl sterilization device in a sewage purification device according to another preferred embodiment of the present application is shown.

[0034] Figure 6 A schematic view of a sewage purification device according to another preferred embodiment of the present application is shown.

[0035] Figure 7 A schematic view of a sewage purification device according to another preferred embodiment of the present application is shown.

[0036] BRIEF DESCRIPTION OF DRAWINGS

[0037] 1 - sewage purification device, 11 - hydroxyl generating device, 12 - automatic chemical injection device, 13 - cooling tower, 14 - hydroxyl sterilization device, 15 - flocculation tank, 16 - sewage discharge port, 17 - crystal recovery pump, 210 - negative ion generator;

[0038] 2 - sewage purification device, 21 - first plurality of hydroxyl generating devices, 23 - cooling tower, 24 - second plurality of hydroxyl sterilization devices, 25 - flocculation tank, 27 - crystal recovery pump, 28 - circulating hydroxyl generating device;

[0039] 411 - gas supply device, 412 - negative ion generator, 413 - ozone generator, 414 - negative oxygen ion reaction chamber, 415 - water container, 417 - electron emission electrode. DETAILED DESCRIPTION

[0040] The preferred embodiment of the present application proposes a sewage purification device. By using the present application, the calcium-containing components in the water in the cooling tower can be precipitated and the water can be disinfected, so that the water in the cooling tower and the water can be thoroughly purified and disinfected in a short time.

[0041] As shown in Figure 1 The sewage purification device 1 for purifying circulating water according to an embodiment of the present application includes a hydroxyl radical generating device 11. The hydroxyl radical generating device 11 can be as shown in Figure 2As shown, the sewage containing the substance for filtering calcium is fed into the hydroxyl generating device. The hydroxyl generating device 11 can be a plurality of hydroxyl generating devices, including at least one pipe or a plurality of parallel pipes, each pipe, that is, each hydroxyl generating device, is provided with an air ionization device, a plurality of negative ion generators 210, etc., powered by an external power source or an internal battery power source. The negative ion generator releases electrons when in operation, and the electrons enter the water in the form of free electrons or in the form of forming negative oxygen ions. The electrons and negative oxygen ions can form various reactions with the substances in the water, such as hydrogen ions being reduced to hydrogen atoms by electrons, hydrogen ions obtaining the electrons of negative oxygen ions to generate water molecules, negative oxygen ions reacting with water molecules to generate hydroxide ions, etc. The negative ion generator includes an electron releasing electrode, such as an ionization brush, which generates a large number of free electrons that react with calcium compounds in the sewage and the substance for filtering calcium from the automatic dosing device to form, for example, water-soluble calcium bicarbonate in the sewage into water-insoluble calcium carbonate. The substance for filtering calcium includes calcium carbonate, calcium hydroxide, ferric sulfate, sodium sulfate, activated carbon, polyacrylamide, etc. The water containing calcium carbonate is fed into the flocculation tank. Of course, the water containing calcium carbonate can also be fed into the steady flow tank before being fed into the flocculation tank. The water in the flocculation tank can also be fed back to the hydroxyl generating device through the back crystal pump 17 or the water pump connected between the flocculation tank and the hydroxyl generating device 11 to react again. The back crystal pump 17 can feed the small calcium carbonate crystals in the water in the flocculation tank back to the hydroxyl generating device for further reaction to make them larger. The water discharged from the flocculation tank can precipitate water-insoluble substances such as calcium carbonate. In the present application, the free electrons generated by the air splitting water molecules generate hydroxide (OH-), which reacts with calcium bicarbonate (Ca(HCO3)2) to remove the hydrogen of bicarbonate, trigger the reaction of carbonate with cations, and make calcium form calcium carbonate (CaCO3) to precipitate. In the present application, first, calcium is the most important cation in water, and the precipitate is mainly calcium carbonate, and carbonate reacts with most metal ions to precipitate. Then, the use of anions correspondingly reduces bicarbonate. Thirdly, part of the ionic compounds have oxygen consumption, and the particulate colloid in the water is entrained and precipitated with calcium carbonate. By the method of the present application, the COD is reduced.

[0042] Optionally, the substance containing calcium hydroxide from the automatic dosing device is fed into the water, and the free electrons generated by the negative ion generator generate hydroxide (OH-), which reacts with calcium hydroxide to promote the reaction of calcium hydroxide with the acid in the water to generate salt and water. For example, the reaction with sulfuric acid in water,

[0043] Ca(OH)2+ H2SO4 = CaSO4 + 2H2O.

[0044] Optionally, the substance containing ferric sulfate (e.g. polymeric ferric sulfate) from the automatic dosing device is sent into the water, and the free electrons generated by the negative ion generator generate hydroxyl ions (OH-), and the polymeric ferric sulfate is an inorganic high-molecular flocculant of iron salt, and the hydroxyl ions promote the formation of negative charges on the surface of the particles, realizing the formation of flocs with large specific gravity.

[0045] Optionally, the substance containing polyacrylamide from the automatic dosing device is sent into the water, so that the suspended substances in the water are electrically neutralized, and the free electrons generated by the negative ion generator generate hydroxyl ions (OH-), further promoting the electrical neutralization of the suspended substances, playing a flocculation role, and generating flocs.

[0046] Optionally, a flow stabilizing tank is provided below the pollution discharge port, and the calcium carbonate after the reaction is deposited in the flow stabilizing tank and discharged through the pollution discharge port. However, the calcium carbonate particles after the first reaction are very small and are not conducive to collection. Therefore, the water after the first reaction can be pumped back to the hydroxyl generating device 11 from the flocculation tank 15 through the back crystal pump after passing through the flow stabilizing tank or directly without passing through the flow stabilizing tank, so that the remaining calcium bicarbonate in the water reacts with the substance for filtering calcium sent by the automatic dosing device 12 under the action of negative ions, and the calcium carbonate particles continue to crystallize and become larger. After the water after multiple reactions, the size of the calcium carbonate particles is large enough to be collected, and the purified water containing the calcium carbonate particles can be sent to the flocculation tank 15. The remaining calcium carbonate particles in the water sent to the flocculation tank 15 are discharged through the pollution discharge port.

[0047] The flocculation tank 15 is located downstream of and in fluid communication with multiple hydroxyl generating devices, and water is taken from the flocculation tank by a water pump, circulated back to the flocculation tank after passing through multiple hydroxyl generating devices, that is, the reaction efficiency is improved and the water in the flocculation tank is disturbed and mixed. The flocculation tank is a place for complex multiple reactions of substances in sewage, added reagents, and injected free electrons and negative oxygen ions, and is also a place for the precipitation of precipitates and flocculants. The clear liquid overflowing from the flocculation tank is the purified effluent after the completion of the stage or ultimate treatment. The flocculation tank can be a tank body, a box body, or a pool body depending on the size of the treated water. The sewage in the flocculation tank can also be externally self-circulated by additional multiple hydroxyl generating devices to send the precipitates and precipitable flocculants in the flocculation tank back to the front end of the additional multiple hydroxyl generating devices for recirculation, as crystal seeds for inducing crystallization, to reduce the amount of reagent added. The pollutants react or physically polarize to form precipitates and precipitable flocculants, or are physically polarized or wrapped in flocculants to form flocculants and precipitate. The benefit of using additional multiple hydroxyl generating devices is that the clear liquid is the purified water after the stage or ultimate treatment. The flocculation tank can have a precipitate discharge port at the bottom.

[0048] The automatic medicine injection device 12 is arranged upstream or downstream of the hydroxyl generating device 11, and injects a medicine into the sewage. The medicine is a targeted medicine for removing pollutants, and can include a substance for filtering calcium or a substance for filtering other elements, which is fed into the sewage at a certain speed. The automatic medicine injection device includes a driving device and a medicine storage device, and the medicine storage device stores the substance for filtering calcium. The driving device feeds the substance in the medicine storage device into the sewage through an opening at a predetermined speed. The driving device can include a control unit for controlling the supply speed and flow of the substance in the medicine storage device as needed. The added medicine, the electrons injected into the water, and the substances in the water react chemically and physically. The chemical reaction generates precipitated substances that are insoluble or slightly soluble in water, so as to achieve the purpose of precipitation from the water. The physical reaction mainly includes a polar adsorption reaction of positive and negative attraction and a flocculation reaction of long-chain molecules on small-molecule substances, so as to achieve the purpose of precipitation from the water. The precipitated substances are cations and anions such as calcium ions, magnesium ions, iron ions, heavy metal ions, carbonate ions, sulfate ions, nitrate ions, and various organic substances, colloids, suspended particulate matters, proteins, bacteria, and the like, so as to achieve the purpose of water purification.

[0049] The sewage purification device 1 includes a cooling tower 13 arranged upstream of the automatic medicine injection device 12, for cooling the sewage, such as air conditioning, and the like, so as to facilitate further processing. The cooling tower can be a suitable cooling tower for water circulation. The cooling tower includes a tower body, which includes a water inlet, a water tank, and a water outlet. Water from the water inlet flows into the water tank. The tower body can also be provided with one or more of a fan, a radiator, a condenser, and the like, cooling mechanism, for cooling the water in the water tank. The cooling tower 13 can also include a water pump for helping water to enter and exit the cooling tower. The cooling tower for water circulation draws the water in the water tank into the water tank through a water adding assembly, and then the fan operates to bring air flow into the tower body from the air inlet to reduce the temperature of the water in the water tank, so as to achieve the purpose of cooling. The radiator and the condenser installed to the water tank can also be used to dissipate heat from the water in the water tank.

[0050] The sewage purification device 1 can also include a hydroxyl disinfection device 14. The hydroxyl disinfection device 14 is arranged downstream of the flocculation tank 15, and is used to receive the purified calcium sewage from the flocculation tank.

[0051] The hydroxyl disinfection device 14 according to an embodiment of the present application is as follows Figure 5The hydroxyl sterilization device 14 is shown to include a negative oxygen ion generating device. The negative oxygen ion generating device is fluidly connected to the gas supply 411 and the water container 415 inside or outside the hydroxyl sterilization device 14, respectively. The negative oxygen ion generating device includes a negative ion generator 412 powered by an external power source or an internal battery power source (not shown). The negative oxygen ion generating device is fluidly connected to the gas supply 411 to receive air from the gas supply 411 and to release electrons when in operation to form negative oxygen ions. Optionally, the negative oxygen ion generating device further includes a negative oxygen ion reaction chamber 414 fluidly connected to the gas supply 411 to receive air from the gas supply 411. Alternatively, there can be no gas supply and the free electrons are generated by the combination with air in the hydroxyl sterilization device. The negative ion generator is connected to a power source to generate a large number of free electrons by an electron releasing pole, such as an ionizing brush, in the negative oxygen ion reaction chamber 414. The free electrons released into the negative oxygen ion reaction chamber 414 enter the air at a speed of, for example, picoseconds (trillionths of a second) due to the presence of oxygen in the air in the negative oxygen ion reaction chamber. Generally, the free electrons will combine with ions in the air to react and form ions with a negative charge, i.e., negative ions. Since air includes oxygen (O2), which is the most electrophilic in the atmosphere, the free electrons first combine with the oxygen to form negative oxygen ions (O2 - ). The negative oxygen ion reaction chamber is connected to the negative ion generator 412 to receive the electrons from the negative ion generator. Optionally, the negative oxygen ion generating device further includes an electron releasing pole 417 that extends from the negative ion generator 412 and, for example, into the negative oxygen ion reaction chamber 414 so that the electrons come into contact with the air from the gas supply 411 in the negative oxygen ion reaction chamber 414 so that the air is charged with negative oxygen ions. Subsequently, the air charged with the negative oxygen ions is sent through a pipe into the water container 415 in the hydroxyl sterilization device 14 for receiving the sewage from the flocculation tank 15 or directly into the pipe in which the sewage from the flocculation tank 15 is flowing, thereby delivering the negative oxygen ions with the gas to the water container 415. The content of the negative oxygen ions in the air is, for example, 20 million / cm 2 to 80 million / cm 2 , or 30 million / cm 2 to 750 million / cm 2 , or higher or lower.

[0052] The hydroxyl sterilization device 14 according to an embodiment of the present application also includes an ozone generator 413 powered by an external power source or an internal battery power source. Ozone, due to its strong oxidizing property, can oxidize phenolic cyanogen harmful organic matter and chlorine-containing elements, and can be used to remove organic harmful substances in water. The ozone generator 413 is connected to the gas supply device 411 and receives gas from the gas supply device 411. Optionally, the gas is gas that has flowed through the negative oxygen ion generator and has received negative oxygen ions, or the gas is gas that will flow through the negative oxygen ion generator and will receive negative oxygen ions, or alternatively, the gas is discharged from the gas supply device 411 separately from the gas supplied to the negative oxygen ion generator, or alternatively, the gas is discharged from the gas supply device 411 together with the gas supplied to the negative oxygen ion generator, and then supplied to the negative oxygen ion generator and the ozone generator 413, respectively, via separate pipelines. The ozone generator 413 emits ozone in the received gas, and the emission rate of ozone is, for example, 300 mg / h-850 mg / h, or 350 mg / h-800 mg / h, or 450 mg / h-700 mg / h, or higher or lower contents are also possible, and can be changed according to the size of the volume capacity of the device and the demand. The gas containing ozone is then discharged from the ozone generator. The first gas with negative oxygen ions and the second gas with ozone are mixed by a gas mixing mechanism, and are transported to the sewage water container 415 or the sewage pipeline through one pipeline or two or more pipelines, or the first gas and the second gas are separately fed into the sewage water container 415 or the pipeline. At this time, in the water, ozone and negative oxygen ions generate hydroxyl radicals. In a short time, such as a few minutes, the water in the container and the objects in the water can be thoroughly disinfected. Of course, alternatively, the ozone generated by the ozone generator can also be transmitted to the gas containing negative oxygen ions, or the gas containing negative oxygen ions can be transmitted to the gas containing ozone, so that the gas mixed with ozone and negative oxygen ions is transmitted to the sewage.

[0053] An embodiment of the present invention proposes a sewage purification method, which comprises, first, sending sewage from a cooling tower into an automatic dosing device, of course, the automatic dosing device can also receive sewage from other sources, such as directly from sewage generating equipment. The automatic dosing device injects a substance for removing calcium into the sewage, and then sends the sewage containing the substance into a hydroxyl generating device. Free electrons are generated by the hydroxyl generating device, which combine with oxygen in the air to generate negative oxygen ions, which are sent into the received sewage to react with the substance for removing calcium, so that the water-soluble calcium-containing compounds in the sewage, such as calcium bicarbonate, are formed into water-insoluble calcium-containing compounds, such as calcium carbonate. The water-insoluble calcium-containing compounds are discharged. The sewage purification method of the sewage purification device of the present invention is different from the degradation of pollutants by traditional biochemical treatment and oxidation method, and the sewage purification method is a method of precipitating pollutants from water, which is a method of forming a flocculation and precipitation effect of pollutants by chemical and physical reactions between the added reagent, the injected gas containing free electrons and negative oxygen ions, and the substances in water. Chemical reaction refers to both combination reaction of substances and redox reaction of substances; physical reaction refers to both polar adsorption reaction between anions and cations in water and reaction of change of positive and negative charges of substances in water, and also refers to flocculation reaction of long molecular chain molecules on small molecular weight molecules.

[0054] The method of an embodiment of the present invention also includes disinfecting the sewage by using a hydroxyl disinfection device, first, supplying a gas containing oxygen, such as air, and then releasing electrons to the gas to form negative oxygen ions in the air, transporting ozone generated by an ozone generator into the air, and then transporting the gas with negative oxygen ions and the gas with ozone into the received treated sewage respectively, or mixing the gas with negative oxygen ions and the gas with ozone and transporting the mixed gas into the received treated sewage.

[0055] Hydroxyl radicals have an oxidation potential value of 2.8, and since the potential value of substances has polar adsorption force, it can adsorb and capture surrounding heteropolar substances, so the oxidation and disinfection capacity of hydroxyl radicals is hundreds to thousands of times higher than that of common substances such as hydrogen peroxide and hypochlorous acid. However, hydroxyl radicals are extremely unstable and exist for only one ten-thousandth of a second. Disinfection using hydroxyl radicals requires continuous generation, and a cycle of continuous generation, continuous disinfection, and continuous disappearance of harmful substances is established. The hydroxyl disinfection device 14 of the present invention continuously injects hydroxyl radicals into water for disinfection.

[0056] According to the method of the present application, negative oxygen ions are first generated, for example by a negative oxygen ion generator, and ozone is generated. According to one embodiment, the negative oxygen ion generator generates electrons, and the negative ion generator is connected to a power supply, whereby the electron release electrode releases electrons into the negative oxygen ion reaction chamber to release the electrons into the air provided by the air supply. The electrons released by the electron release electrode ionize the air, which includes oxygen, to form negative oxygen ions in the gas. The negative oxygen ions are highly reactive and immediately initiate a reactive reaction of molecular fission of water, and in a time unit of picoseconds, the negative oxygen ions combine with water to form a substance including hydroxyl ions. The water also includes free electrons that have not yet reacted, and the free electrons quickly localize upon entering the water, but the localization is unstable and forms a novel proton transfer phenomenon, producing H2, which eventually becomes a more stable system of hydrated hydroxyl ions (OH"). Ozone is provided in the water that already includes the hydroxyl ions, and the ozone reacts with the hydroxyl ions in the water to form hydroxyl radicals. The ozone can be provided by an ozone generator. The hydroxyl ions and the ozone quickly form the hydroxyl radicals upon meeting each other to quickly disinfect and decontaminate. Because the ozone and the hydroxyl ions are relatively stable in the water, for example, for about 20-40 minutes, for example, 30 minutes, the process of generating the ozone and the hydroxyl ions before the disinfecting and decontaminating process is implemented can be controlled in an orderly manner, and thus the process of the ozone and the hydroxyl ions from being free to meeting each other to form the hydroxyl radicals is controlled.

[0057] Ozone dissolves in water but decomposes faster than in air, and can remain in water for about 30 minutes under normal conditions. Since the hydroxyl radical can be generated by the reaction between the hydroxide ion and the ozone ion in water, the water can be disinfected and the ozone concentration in the water can be greatly reduced, and the odor of ozone can be eliminated. Ozone in water directly oxidizes organic matter and microorganisms through direct reaction, and sterilizes and disinfects to remove residual chlorine and phenol cyanide substances. Ozone in water also forms hydroxyl radicals with stronger disinfection capacity under the induction of hydroxyl OH-, that is, -OH with 9 unstable electrons, thereby exerting stronger ability to eliminate organic matter and microorganisms. In addition, ozone in active water also reacts with water molecules to form hydrogen peroxide (H2O2) to play a disinfection role. Hydrogen peroxide is more stable than ozone, so it forms disinfection persistence. As an example, the method includes continuously or intermittently delivering ozone generated by an ozone generator to a water supply device to combine with water containing hydroxide ions generated by negative oxygen ions to form hydroxyl radicals in the water. As an example, the method includes continuously or intermittently delivering ozone generated by an ozone generator to another water supply device, and delivering ozone-containing water of the other water supply device to water containing hydroxide ions generated by negative oxygen ions in the water supply device, or delivering water containing hydroxide ions generated by negative oxygen ions in the water supply device to the other water supply device, so that the negative oxygen ions in the water combine with the hydroxide ions to form hydroxyl radicals in the water. As an example, the method includes continuously or intermittently delivering ozone generated by an ozone generator to another water supply device, and then delivering water containing hydroxide ions generated by negative oxygen ions in the water supply device and ozone-containing water of the other water supply device to another container, in which the negative oxygen ions in the water combine with the hydroxide ions to form hydroxyl radicals in the water. Optionally, the water disinfection method further includes circulating the water in the water disinfection device, for example, using a circulating device such as a circulating pump, thereby thoroughly disinfecting the water in the device within a relatively short period of time, such as a few minutes. In addition, ozone can be sent to a cooling tower through circulation to further sterilize sewage.

[0058] As Figure 3 , Figure 4 , Figure 6 and Figure 7 indicate that the sewage purification device 2 according to an embodiment of the present application uses a hydroxyl generating device to filter the sewage sent therein, and also uses the hydroxyl generating device to circulate and pump the sewage in the sedimentation tank for further filtration, and then sends the sewage from the sedimentation tank to a hydroxyl disinfection device for disinfection, so as to achieve the treatment of the sewage. Specifically, as Figure 2As shown, the contaminated water in the cooling tower 23 enters the first plurality of hydroxyl generating devices 21, which includes a plurality of parallel pipes, each of which represents a hydroxyl generating device, and a plurality of negative ion generators are provided in each pipe by ionizing air, powered by an external power source or an internal battery power source. The first plurality of hydroxyl generating devices 21 are similar to the hydroxyl generating device 11 described above, so that the contaminants in the contaminated water are formed into precipitates, such as water-soluble calcium bicarbonate into water-insoluble calcium carbonate or corresponding reaction precipitates. Each of the hydroxyl generating devices in the first plurality of hydroxyl generating devices includes a negative ion generator, which releases electrons when in operation, which enter the water as free electrons or as negative oxygen ions. The electrons and negative oxygen ions can form a variety of reactions with the substances in the water, such as hydrogen ions being reduced to hydrogen atoms by electrons, hydrogen ions being combined with electrons of negative oxygen ions to form water molecules, negative oxygen ions reacting with water molecules to form hydroxyl ions, etc.

[0059] The flocculation tank 25 receives the electrons and negative oxygen ions from the first plurality of hydroxyl generating devices 21 and the medicine from the medicine administration device, which is used to cooperate with the electrons and negative oxygen ions from the first plurality of hydroxyl generating devices 21 to precipitate the contaminants in the contaminated water. The precipitated contaminants are discharged through a sewage outlet, and the water in the flocculation tank 25 is also sent back to the second plurality of hydroxyl generating devices 28 for reaction again to form contaminated precipitates by the back crystal pump 27 or the circulating pump connected between the flocculation tank 25 and the second plurality of hydroxyl generating devices 28. For example, more calcium carbonate or corresponding reaction precipitates are generated. The back crystal pump circulates the water in the flocculation tank, which can promote and accelerate the crystallization of substances in the water by the circulating treatment of the second plurality of hydroxyl generating devices 28, thereby saving medicine.

[0060] After a plurality of reactions, the precipitates are discharged, and the treated water is subjected to further cleaning and disinfection by the hydroxyl disinfection device 24. The hydroxyl disinfection device 24 is similar or identical to the hydroxyl disinfection device 14 described above. The water that is removed of impurities and cleaned returns from the hydroxyl disinfection device 24 to the cooling tower 23 for next use.

[0061] The sewage purification device and method can improve the removal efficiency of calcium in sewage, improve the sterilization efficiency, reduce the concentration of chloride ions, improve the concentration multiple, and further hinder the corrosion of the pipeline. In addition, the principle of hydroxyl desalination is used to solve the hardness and alkalinity of cooling water and the problem of scaling. The bypass circulation precipitates part of the calcium ions and carbonic acid (hydrogen) ions in the cooling water. At the same time, the hydroxyl can achieve the effect of reducing chlorine sterilization, which can eliminate the existence of legionella in sewage and solve the problem of pipeline corrosion and sludge. The present application adopts the high-efficiency hydroxyl advanced oxidation sterilization equipment and method to kill most of the bacteria in the bypass circulation, so that the ozone-containing water in the reflux is continuously sterilized in the cooling tower, and the total bacterial content is reduced by an order of magnitude.

[0062] The sewage purification method of the present application comprises the following steps: in the first step, the hydroxyl desalination test is carried out once and circulated; in the second step, the hydroxyl advanced oxidation sterilization and chlorine ion reduction test is carried out, and the following treatments are carried out in sequence and sampling is carried out under the condition of one-time passage of the pipeline (total oxidation amount 5.9mg). (1) Add 100mg / L of the agent, pass the sewage purification device once, and stand for 2 hours. The calcium ions (calcium carbonate) are reduced from 323mg / L to 272mg / L, and the reduction is 15.8%. (2) Add 100mg / L of the agent again, circulate the sewage purification device for 1 hour, and directly sample. The calcium ions (calcium carbonate) are reduced to 144.5mg / L, and the reduction is 55.3%. (3) Circulate the sewage purification device for 4 hours, and directly sample the calcium ions (calcium carbonate). The reduction is 81.6%. In the above process, the chloride ions are reduced from 160mg / L to 140mg / L, and the reduction is 12.5%. The number of bacteria is reduced from 576 million / ml to 516 million / ml, and the reduction is 10.4%. The PH value is reduced from 9.1 to 9. The conductivity is reduced from 1457us / cm to 1218, and the reduction is 16.4%.

[0063] The sewage purification device can make the bypass circulation of the cooling water system auxiliary cooling water fully qualified. In terms of alkalinity and hardness, a large amount of calcium ions and carbonate ions are precipitated from the circulating water in the form of calcium carbonate, and the alkalinity and hardness are controlled. In terms of bacteria control, the reflux water is sterilized, the total amount of bacteria in the circulating water is reduced, and the generated ozone can be returned to the cooling tower for further sterilization. The bacteria control can be quantified to 10 to the power of 4. In terms of chloride ion control, part of the chloride ions can be continuously reduced, and the low content of chloride ions can be maintained without adding bactericides. In terms of conductivity control, the total amount of soluble salts in the circulating water is controlled by continuously reducing the cations (calcium) and anions (chloride and carbonate) in the circulating water, and the conductivity is maintained at a low level.

[0064] The word "comprise" as used in the specification is meant to mean "including, but not limited to." In interpreting each statement in this specification that includes one or more of the terms "include," "in accordance with," "include," "includes," "including," and "comprise" or "comprises," it is understood that every single species also "include," "in accordance with," "include," "includes," "including," and "comprise" other species. Related terms such as "comprise" and "comprises" should be construed in the same manner.

[0065] Many modifications in addition to those described above will be apparent to those skilled in the art in view of the foregoing description. Such modifications are also intended to fall within the scope of the appended claims. The disclosure and description herein are purely illustrative and are not intended to be limiting. Where specific integers are mentioned herein that have known equivalents in the art to which this application pertains, such known equivalents are deemed to be incorporated in the description herein, as if individually set forth.

[0066] As used herein, the term "and / or" means "and" or "or" or both.

[0067] In the description of the application in this specification, reference can be made to subjects that are not within the scope of the appended claims. Such subjects should be readily identified by those skilled in the art and can be helpful in putting the application as defined in the appended claims into practice.

[0068] While the application is generally defined as above, those skilled in the art will appreciate that the application is not limited thereto and that the application also includes the embodiments exemplified by the following examples.

[0069] The foregoing description of the application includes preferred forms thereof. Modifications can be made to it without departing from the scope of the application.

Claims

1. A sewage purification apparatus, characterized by comprising: Comprising: an automatic dosing apparatus to inject a corresponding medicament to remove contaminants in water into sewage, wherein the automatic dosing apparatus comprises a driving device and a medicament storage device, the medicament storage device stores a substance for filtering calcium, the driving device sends the substance in the medicament storage device into the sewage through an opening at a predetermined speed; a first plurality of hydroxyl generating apparatuses upstream or downstream of the automatic dosing apparatus and in fluid communication with the automatic dosing apparatus, the first plurality of hydroxyl generating apparatuses comprising an air ionization apparatus, a negative ion generator, which releases electrons in operation to form free electrons and negative oxygen ions, the free electrons and negative oxygen ions are sent into the received sewage to react with the contaminants to be removed and the injected corresponding medicament to generate precipitates and precipitable flocculants through reaction or through physical polar adsorption of the contaminants in the sewage; a flocculation tank downstream of the first plurality of hydroxyl generating apparatuses and in fluid communication with the first plurality of hydroxyl generating apparatuses, whereby the contaminants, the corresponding medicament and the injected free electrons and negative oxygen ions in the flocculation tank react or physically polarize to generate precipitates and precipitable flocculants; and a hydroxyl disinfection device downstream of the flocculation tank and in fluid communication with the flocculation tank, the hydroxyl disinfection device comprising: a gas supply device configured to supply gas; a negative oxygen ion generating device configured to be in fluid connection with the gas supply device and a water supply device respectively, the negative oxygen ion generating device comprising a negative ion generator, the negative oxygen ion generating device is in fluid connection with the gas supply device to receive gas from the gas supply device, the gas containing oxygen, the negative ion generator is configured to release electrons in operation to the received gas containing oxygen to form negative oxygen ions in the gas, and the negative oxygen ions are transported into the received water with the gas, the negative oxygen ions react with water molecules in the water to generate hydroxyl ions; and an ozone generator in fluid connection with the water supply device and the gas supply device, the ozone generator is configured to receive gas from the gas supply device, and to send ozone generated by the ozone generator into the gas to send the gas containing ozone into the received water.

2. The device according to claim 1, characterized in that Further comprising a second plurality of hydroxyl generating apparatuses in circulation communication with the flocculation tank, water from the flocculation tank is recirculated back to the flocculation tank through the second plurality of hydroxyl generating apparatuses, the second plurality of hydroxyl generating apparatuses comprising an air ionization apparatus, a negative ion generator, which releases electrons in operation to form free electrons and negative oxygen ions, the free electrons and negative oxygen ions are sent into the sewage in the flocculation tank to react with the contaminants in the water and the injected corresponding medicament to make the contaminants to be removed in the sewage generate precipitates and precipitable flocculants through reaction or through physical polar adsorption.

3. The device according to claim 2, characterized in that The negative ion generator includes an electron emitting electrode that extends from the negative ion generator and contacts the gas from the gas supply to emit electrons to the gas from the gas supply.

4. The device according to claim 2, characterized in that The negative oxygen ion generating device further includes a negative oxygen ion reaction tank that is fluidly connected to the gas supply to receive the gas from the gas supply, and that is connected to the negative ion generator to receive the electrons from the negative ion generator and to deliver the gas with the generated negative oxygen ions to the received water.

5. The device according to claim 2, characterized in that The gas with the negative oxygen ions and the gas with the ozone are delivered together to the received water after being mixed, or the gas with the negative oxygen ions and the gas with the ozone are delivered separately to the received water.

6. A device for purifying sewage water according to any of claims 2-5, characterized in that A flow stabilizing tank is further included, which is connected between the first plurality of hydroxyl radical generating devices and the flocculation tank to discharge the precipitates that are not soluble in water.

7. A device for purifying sewage water according to any of claims 2-5, characterized in that A back crystal pump is further included, which is connected between the flocculation tank and the second plurality of hydroxyl radical generating devices to send the precipitates and the flocculable flocs in the flocculation tank back to the front end of the second plurality of hydroxyl radical generating devices for recirculation.

8. A sewage purification method using the sewage purification apparatus according to any one of claims 2 to 7, characterized by, The sewage purification method includes: injecting a reagent required for removing contaminants into the sewage by an automatic reagent injection device; generating free electrons and negative oxygen ions by the first plurality of hydroxyl radical generating devices or the first and second plurality of hydroxyl radical generating devices, and sending the free electrons and the negative oxygen ions into the received sewage to react with the contaminants in the water and the added reagent, so that the contaminants in the sewage are generated as precipitates and flocculable flocs by the reaction or by physical polar adsorption; and discharging the precipitates and the precipitated flocs.

9. The method of purifying sewage water according to claim 8, characterized in that, Further includes, supplying a gas containing oxygen; emitting electrons to the gas to form negative oxygen ions in the gas, and delivering the negative oxygen ions with the gas to the received treated sewage; delivering generated ozone into the gas to send the gas containing ozone into the received treated sewage or to send the gas containing ozone into the gas containing negative oxygen ions. The negative oxygen ion generating device further includes a negative oxygen ion reaction tank that is fluidly connected to the gas supply to receive the gas from the gas supply, and that is connected to the negative ion generator to receive the electrons from the negative ion generator and to deliver the gas with the generated negative oxygen ions to the received water. The gas with the negative oxygen ions and the gas with the ozone are delivered together to the received water after being mixed, or the gas with the negative oxygen ions and the gas with the ozone are delivered separately to the received water. A flow stabilizing tank is further included, which is connected between the first plurality of hydroxyl radical generating devices and the flocculation tank to discharge the precipitates that are not soluble in water. A back crystal pump is further included, which is connected between the flocculation tank and the second plurality of hydroxyl radical generating devices to send the precipitates and the flocculable flocs in the flocculation tank back to the front end of the second plurality of hydroxyl radical generating devices for recirculation. The sewage purification method includes: injecting a reagent required for removing contaminants into the sewage by an automatic reagent injection device; generating free electrons and negative oxygen ions by the first plurality of hydroxyl radical generating devices or the first and second plurality of hydroxyl radical generating devices, and sending the free electrons and the negative oxygen ions into the received sewage to react with the contaminants in the water and the added reagent, so that the contaminants in the sewage are generated as precipitates and flocculable flocs by the reaction or by physical polar adsorption; and discharging the precipitates and the precipitated flocs. Further includes, supplying a gas containing oxygen; emitting electrons to the gas to form negative oxygen ions in the gas, and delivering the negative oxygen ions with the gas to the received treated sewage; delivering generated ozone into the gas to send the gas containing ozone into the received treated sewage or to send the gas containing ozone into the gas containing negative oxygen ions.

Images