Novel new flocculation water purification method and device

Abstract

The invention relates to a flocculation water purification method, which comprises: (1) mixing a water purification agent precursor with a liquid, carrying out excitation treatment, adding into a water body to be purified, and / or directly mixing the water purification agent precursor with the water body to be purified, carrying out excitation treatment, and carrying out a reaction on the water purification agent precursor to generate ferric hydroxide, carrying out co-sedimentation with suspended matters and / or impurities in the water body to be purified; the excitation treatment comprises the step of adding oxidizing substances; (2) carrying out solid-liquid separation on the mixture obtained in the step (1) to obtain a water body subjected to flocculation purification treatment; according to the method, suspended matters in water can be settled, part of organic impurities can be adsorbed, and acid and salt brought by new hydroxides can be avoided; the invention further provides a flocculation water purification device.

Description

A new type of fresh flocculation water purification method and device Technical Field

[0001] The present invention belongs to the technical field of water purification, and in particular relates to a novel freshwater flocculation purification method and device. Background Art

[0002] Water is an important resource for the survival of all life, including humans, and is also the most important component of organisms. Therefore, for the sake of health, people are paying more and more attention to water treatment.

[0003] Existing water purification processes, such as tap water purification processes, are usually:

[0004] In the first step, aluminum hydroxide and / or ferric hydroxide and / or ferrous hydroxide colloids are generated in the treated water by chemical reaction to settle suspended solids in the water and perform solid-liquid separation.

[0005] The second step is to treat the non-suspensible metal ions, organic matter, nitrogen and phosphorus compounds;

[0006] The third step is to treat the water by adjusting its pH value and / or disinfecting it.

[0007] Since aluminum hydroxide, ferric hydroxide, and ferrous hydroxide are all insoluble in water, most of them fail to form colloids when added directly to water, making it difficult for them to form flocs with suspended matter in the water and settle, resulting in significant waste. Therefore, the prior art typically uses inexpensive but effective aluminum and / or iron salts to carry out the first chemical reaction, hydrolyzing them under appropriate pH conditions to form the hydroxide flocculent colloids to purify the suspended matter in the water by settling.

[0008] Among them, the hydrolysis chemical reaction principle of the aluminum salt and / or iron salt is shown in the following chemical reaction equations: AlCl3+3H2O→Al(OH)3+3HCl; FeCl3+3H2O→Fe(OH)3+3HCl; 2FeCl2+5H2O+[O]→2Fe(OH)3+4HCl; Al2(SO4)3+6H2O→2Al(OH)3+3H2SO4; Fe2(SO4)3+6H2O→2Fe(OH)3+3H2SO4; 2FeSO4+5H2O+[O]→2Fe(OH)3+2H2SO4.

[0009] As can be seen from the above chemical reaction equation, the hydrolysis reaction of aluminum and / or iron salts, while producing Al(OH)3 and / or Fe(OH)3 colloids, is inevitably accompanied by the production of acid. This acid shifts the chemical equilibrium of the hydrolysis reaction to the left, resulting in incomplete hydrolysis of the aluminum and / or iron salts. This causes a small amount of aluminum and / or iron salts to enter the next water treatment step, where they hydrolyze and form colloids that adhere to equipment, affecting the treatment efficiency of the second step. Furthermore, in the third step, the more alkaline oxidant added to the water for disinfection, the more salt is generated in the treated water. Therefore, after undergoing the existing water purification process, the acidity and salt content of the water are high. Long-term consumption of drinking water purified using this process can disrupt the body's acid-base balance, significantly increasing the risk of cardiovascular and cerebrovascular diseases, hypertension, and hyperlipidemia. Furthermore, using this process for industrial water reuse can directly impact product quality.

[0010] To address these shortcomings, existing technologies utilize ion exchange resins and / or reverse osmosis processes to remove salt and acidic compounds from water. However, due to the high selectivity of ion exchange resins and reverse osmosis membranes, process equipment is complex to manufacture and has high equipment management costs. During operation, both the ion exchange resins and reverse osmosis membranes require frequent replacement, with each replacement often costing tens or even hundreds of thousands of yuan, resulting in high operating costs. Consequently, ion exchange and reverse osmosis methods have been difficult to adopt in production.

[0011] Currently, there is no comprehensive solution that can generate hydroxides for flocculation and purification while also avoiding the generation of salt or acidic substances. Due to concerns about human health and the environmentally friendly use of industrial water resources, there is a need to optimize existing water purification technologies.

[0012] Summary of the Invention

[0013] The first object of the present invention is to provide a new type of nascent flocculation water purification method, which can effectively settle suspended matter in water and adsorb some organic impurities, and can avoid the acid and salt brought by nascent hydroxides, thereby ensuring drinking health and reducing the adverse effects of industrial water reuse.

[0014] The second object of the present invention is to provide a flocculation water purification device suitable for the above method.

[0015] The first object of the present invention is achieved through the following technical solutions:

[0016] A novel flocculation water purification method comprises the following steps:

[0017] (1) mixing a water purifier precursor with a liquid, performing an excitation treatment, and then adding the mixture to the water to be purified, so that the water purifier precursor reacts to generate ferric hydroxide, which is then co-precipitated with suspended matter and / or impurities in the water to be purified;

[0018] The excitation treatment includes adding an oxidizing substance;

[0019] (2) The mixture obtained in step (1) is subjected to solid-liquid separation to obtain a water body after flocculation purification treatment.

[0020] A novel flocculation water purification method comprises the following steps:

[0021] (1) A water purifier precursor is directly mixed with the water to be purified and subjected to an excitation treatment, so that the water purifier precursor reacts to generate ferric hydroxide, which is then co-precipitated with suspended matter and / or impurities in the water to be purified;

[0022] The excitation treatment includes adding an oxidizing substance;

[0023] (2) The mixture obtained in step (1) is subjected to solid-liquid separation to obtain a water body after flocculation purification treatment.

[0024] The above two methods can be carried out together, that is, after the water purifier precursor is mixed with the liquid and subjected to an excitation treatment and then added to the water body to be purified, the water purifier precursor is directly mixed with the water body to be purified and subjected to an excitation treatment.

[0025] In step (1), the water purifier precursor is ferrous carbonate and / or ferrous hydroxide; the liquid is any one or a combination of a water purifier precursor aqueous solution, pure water, or the water to be purified; preferably pure water. When the liquid is a combination of one or more of the above components, the ratio of the components is not limited.

[0026] When the liquid is water to be purified, the water purifier precursor can be mixed with a small amount of water to be purified and then added to a large amount of water to be purified after being excited, or the water purifier precursor can be directly mixed with the water to be purified and then excited.

[0027] The present invention utilizes the water purifier precursor to precipitate suspended matter and / or impurities in water through an excitation treatment, i.e., an oxidation reaction, or a hydrolysis reaction thereof to generate a newly generated ferric hydroxide colloid. The chemical reaction of the water purifier precursor is described in detail below:

[0028] When the water purifier precursor containing ferrous iron is exposed to oxidizing substances during the excitation treatment, the ferrous ions are oxidized to ferric ions; when the water purifier precursor contains ferrous carbonate, since ferric carbonate is unstable in water, the ferrous carbonate is exposed to oxidizing substances during the excitation treatment and comes into contact with water, which will rapidly oxidize and hydrolyze in the water to generate ferric hydroxide and release carbon dioxide, see Formula 1; when the water purifier precursor is ferrous hydroxide, it is exposed to oxidizing substances during the excitation treatment and is rapidly oxidized to ferric hydroxide, and no carbon dioxide is generated during the reaction, which is more environmentally friendly, see Formula 2; 4FeCO3+6H2O+2[O]→4Fe(OH)3+4CO2↑ Formula 1; 2Fe(OH)2+H2O+[O]→2Fe(OH)3 Formula 2.

[0029] As can be seen from the above chemical reaction equation, the method of the present invention can realize the new generation of ferric hydroxide from the water purifier precursor, creating a water purification process without the generation of by-products such as acid or salt. It can not only achieve the effect of flocculation water purification, but also avoid the negative effects of acid and salt on human health and industrial water reuse, and also save the cost required for treating by-products.

[0030] Moreover, the excitation treatment adopted in step (1) of the present invention includes adding an oxidizing substance to generate ferric hydroxide, and utilizing the property of trivalent iron ions to adsorb anions to adsorb organic matter, thereby achieving a better effect of reducing the COD value of the purified water.

[0031] The oxidizing substance in step (1) is one or a combination of oxygen, air, ozone, and hydrogen peroxide. When the oxidizing substance is a combination of one or more of the above components, the ratio between the components is not limited.

[0032] Preferably, the oxidizing substance is oxygen and / or air.

[0033] As a further embodiment of the present invention, when the oxidizing substance described in step (1) includes at least one gaseous oxidizing substance selected from oxygen, air, and ozone, the gaseous oxidizing substance is added to the liquid mixed with the water purifier precursor by at least one method selected from jetting, spraying, pumping, aeration, and liquid injection. The liquid injection method is specifically as follows: the liquid mixed with the water purifier precursor is injected upward under pressure so that it passes through an environment containing the gaseous oxidizing substance and falls into the water body to be purified; or the liquid mixed with the water purifier precursor is mixed with at least one of the oxidizing substances and injected upward under pressure so that it passes through an environment containing the gaseous oxidizing substance and falls into the water body to be purified, and the oxidation reaction of the water purifier precursor is achieved by fully contacting the mixture with the gaseous oxidizing substance during the process of the mixture falling from a high altitude.

[0034] Preferably, when the oxidizing substance in step (1) includes air, the present invention adopts aeration and / or liquid injection to add air in step (1). More preferably, when the oxidizing substance in step (1) includes air, the present invention adopts liquid injection to add air in step (1), thereby facilitating contact of the liquid mixed with the water purifier precursor with more air and more rapidly stimulating the water purifier precursor.

[0035] As a further embodiment of the present invention, the excitation treatment in step (1) is a combination of adding an oxidizing substance and one or more of heating and ultrasonic oscillation.

[0036] When the water purifier precursor comes into contact with water or oxidizing substances and is heated or subjected to ultrasonic vibrations, its hydrolysis reaction will be promoted to generate hydroxides; among them, the ultrasonic wave generates cavitation bubbles in the liquid that can absorb sound wave energy and collapse to release energy in a very short time. When the cavitation bubbles collapse, high temperature and high pressure can be generated in the extremely small space around them, thereby promoting the hydrolysis reaction and oxidation reaction of the water purifier precursor.

[0037] When the water purifier precursor contains ferrous carbonate, the ferrous carbonate may undergo the following hydrolysis reaction to generate ferrous hydroxide before coming into contact with oxidizing substances when heated or subjected to ultrasonic vibration, as shown in Formula 3: FeCO3+H2O→Fe(OH)2+CO2↑ Formula 3.

[0038] The present invention can be improved as follows: in step (1), the amount of iron element mixed in each liter of water to be purified, which comes from ferrous carbonate as a precursor of the water purifier, is ≤300 g, and the amount of iron element mixed in each liter of water to be purified, which comes from ferrous hydroxide as a precursor of the water purifier, is ≤500 g.

[0039] Since the iron ions in the solution exist in the form of hydrated ions, ferrous carbonate, a precursor of the water purifier, absorbs a large amount of water when it forms hydroxide. When the amount of iron from ferrous carbonate, a precursor of the water purifier, exceeds 300g per liter of water to be purified, a large amount of water will be absorbed, and the resulting flocculated sludge will be large in volume, increasing the difficulty of solid-liquid separation and increasing the cost of treatment. When the amount of iron from ferrous hydroxide, a precursor of the water purifier, exceeds 500g per liter of water to be purified, the flocculated sludge will also be large in volume and the cost of treatment will be high.

[0040] The present invention can be improved as follows: in step (1), the amount of iron element from the water purifier precursor mixed in each liter of water to be purified is ≥0.002 g.

[0041] The inventors have found through multiple experiments that when the iron element from the water purifier precursor is mixed in each liter of water to be purified and is not less than 0.002 g, the suspended matter and / or impurities in the water to be purified can be better flocculated and settled.

[0042] The present invention can be improved as follows: in step (1), the pH value of the water to be purified is set to ≥ 2 to obtain a better flocculation effect. This is because when the pH value of the solution environment is less than 2, acid will be significantly present in the solution; at this time, a large portion of the hydroxide generated by the water purifier precursor will react with the acid to form a soluble salt, reducing the amount of flocculent body, thereby affecting the flocculation water purification effect.

[0043] The solution adopted by the present invention to achieve the second purpose is:

[0044] A new type of new flocculation water purification device includes a flocculation sedimentation tank, characterized in that: an oxidizing substance adding device is additionally provided, and the oxidizing substance adding device is provided with at least one of a liquid oxidizing substance outlet, a gaseous oxidizing substance outlet, and a liquid outlet; the oxidizing substance adding device is connected to the flocculation sedimentation tank or is arranged therein, and is used to add oxidizing substances into the flocculation sedimentation tank.

[0045] A second novel flocculation water purification device includes a flocculation sedimentation tank, characterized in that: a water purification agent precursor excitation tank is added to form a combination with the flocculation sedimentation tank;

[0046] The water purifier precursor excitation tank is used to excite the water purifier precursor;

[0047] An oxidizing substance adding device is provided for the water purifier precursor excitation tank, or an oxidizing substance adding device is provided for both the water purifier precursor excitation tank and the flocculation sedimentation tank; the oxidizing substance adding device is connected to or provided in the corresponding water purifier precursor excitation tank and / or flocculation sedimentation tank, and is used to add the oxidizing substance into the water purifier precursor excitation tank and / or flocculation sedimentation tank; the oxidizing substance adding device is provided with at least one of a liquid oxidizing substance outlet, a gaseous oxidizing substance outlet, and a liquid outlet;

[0048] The liquid outlet of the water purifier precursor excitation tank is connected to the flocculation sedimentation tank through a pipeline, or the liquid flow is led to the flocculation sedimentation tank through the liquid outlet of the oxidizing substance adding device arranged in the water purifier precursor excitation tank toward the flocculation sedimentation tank.

[0049] The oxidizing agent dosing device may be a liquid oxidizing agent dosing device composed of a temporary storage tank and a pump, or a gas-liquid mixing device for mixing a gaseous oxidizing agent with the water being purified. The gas-liquid mixing device may be at least one selected from a gas-liquid mixing jet device (Venturi tube), a liquid spray absorption tower, an aerator, an aerator, and a liquid injection device.

[0050] The liquid oxidizing material dosing device is provided with a liquid oxidizing material outlet, the aeration device in the gas-liquid mixing device is provided with a gas oxidizing material outlet, the gas-liquid mixing jet device (Venturi tube) and the liquid spray absorption tower in the gas-liquid mixing device are both provided with a liquid outlet, the aeration device in the gas-liquid mixing device is provided with a gas oxidizing material outlet or a liquid outlet, and the liquid injection device in the gas-liquid mixing device is provided with a liquid outlet. Flowing out of the liquid outlet is a liquid mixed with a water purifier precursor and / or newly formed ferric hydroxide, or a mixture thereof with at least one of the oxidizing materials. The aeration device is a combination of an air pump / compressed gas source and a connecting channel. The liquid injection device consists of a pipeline equipped with a pump and / or a compressed gas source and a nozzle, the nozzle being the liquid outlet. The pump and / or compressed gas source and nozzle combination spray the water to be purified into an environment containing gas oxidizing materials for chemical reaction.

[0051] Furthermore, the flocculation sedimentation tank and / or the water purifier precursor excitation tank is also provided with at least one of a cold and heat exchange device and an ultrasonic generator.

[0052] The ultrasonic generator is a fixed ultrasonic generator integrated with the flocculation sedimentation tank or the water purifier precursor excitation tank, or a separate movable ultrasonic generator independent of the flocculation sedimentation tank and / or the water purifier precursor excitation tank.

[0053] The present invention can be improved as follows: a sedimentation tank is added to the bottom of the flocculation sedimentation tank, and the flocculation sedimentation tank is provided with a discharge port at a position higher than the sedimentation tank. This arrangement allows the flocculated and purified water to be separated from the flocculated impurities by standing still, allowing the flocculated and purified water to flow out of the flocculation sedimentation tank, thereby reducing the amount of impurities in the purified water. The sedimentation tank has an inverted conical structure and a discharge port at its bottom.

[0054] The present invention can be improved as follows: a stirring device is added to the flocculation sedimentation tank and / or the water purifier precursor excitation tank to promote uniform mixing of the water purifier precursor and / or the hydroxide converted therefrom with the water being purified. The stirring device can be one or more of an impeller mechanical stirrer and a circulating liquid pump tubular stirrer.

[0055] The present invention can be improved as follows: a solid-liquid separation device is added, which is connected to the discharge port of the flocculation sedimentation tank to separate the mixture in the flocculation sedimentation tank into solid and liquid. The solid-liquid separation device is selected from a filter press, a filter, a centrifuge and an inclined tube sedimentation tank.

[0056] The present invention can be improved as follows: a temporary storage tank is added, which is directly connected to the flocculation sedimentation tank and / or the water purification agent precursor excitation tank and / or the solid-liquid separation device or is connected through a pump or a solid feeder to load materials to be involved in water purification treatment, or temporarily store materials from the water purification process and thereafter.

[0057] The present invention can be improved as follows: a process data detection device is installed in the flocculation sedimentation tank and / or the water purifier precursor excitation tank. The process data detection device includes at least one of a level meter, a hydrometer, a viscometer, a turbidity meter, a pH meter, a conductivity meter, a redox potentiometer, a flow meter, a Tyndall effect detection device, and a COD detector. Among them, a viscometer detection device and / or a Tyndall effect detection device is additionally installed in the flocculation sedimentation tank and / or the water purifier precursor excitation tank to detect the generation of hydroxide online. The results measured by the process data detection device ensure that the water purifier precursor is effectively converted into hydroxide, thereby achieving more sufficient utilization of the water purifier precursor.

[0058] The present invention can be improved as follows: a process data detection device and an automatic detection and feeding controller component are installed in the flocculation sedimentation tank and / or the water purification agent precursor excitation tank, the automatic detection and feeding controller is used to receive data from the process data detection device, and the operation of the entire flocculation water purification device is automatically controlled based on the obtained data.

[0059] Compared with the prior art, the present invention has the following beneficial effects.

[0060] 1. The present invention excites the water purifier precursor to cause it to undergo oxidation reaction and / or hydrolysis reaction to generate new hydroxide colloid for flocculation water purification treatment. No by-products such as acid or salt are generated, thus avoiding the acid and salt caused by the newly generated hydroxide in existing water purification technologies. At the same time, the use of ion exchange resins and / or reverse osmosis equipment for neutralization and desalination is avoided or reduced, thus saving a large amount of expensive equipment investment funds and expensive equipment maintenance and management fees.

[0061] 2. The present invention uses a hydrolysis reaction and / or oxidation reaction of a water purifier precursor to newly generate hydroxide colloid for flocculation water purification. In the subsequent water purification process, there is no need to purchase additional liquid alkali to neutralize the acid generated in the hydroxide generation process. There is also no need to frequently replace device accessories because unhydrolyzed aluminum salts and / or iron salts enter the impurity removal water treatment process and are hydrolyzed to form colloids that adhere to the equipment. The process conversion will not cause an increase in production costs.

[0062] 3. In the process of generating hydroxide, the present invention does not generate acid and salt due to hydrolysis reaction, thereby improving the quality of purified water, enhancing people's health, and reducing the use of equipment for industrial water reuse.

[0063] 4. The treatment process of the method of the present invention does not add new pollution sources and the water purification cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The present invention will be further described below with reference to the accompanying drawings.

[0065] Figure 1 is a flocculation water purification device used in Example 1;

[0066] Figure 2 is a flocculation water purification device used in Example 2;

[0067] FIG3 is a flocculation water purification device used in Example 3;

[0068] FIG4 is a flocculation water purification device used in Example 4;

[0069] Figure 5 is a flocculation water purification device used in Example 5;

[0070] FIG6 is a flocculation water purification device used in Example 6.

[0071] Figure numerals: 1-flocculation sedimentation tank; 2-water purifier precursor excitation tank; 3-cold and heat exchange device, 4~5-ultrasonic generator; 6~8 oxidizing substance feeding device; 10-sludge tank; 11-stirring device; 14-solid-liquid separation device; 15~17-temporary storage tank; 19~23-process data detection device; 24-automatic detection feeding controller; 25~28-pump; 29-compressed gas source; 40~41-valve; 50~51-discharge port; 55-solid feeder, 56~57-water purifier precursor, 60-water to be purified, 61-purified water, 62~63-oxidizing substance, 67-flocculation precipitate, 69-solid sodium hydroxide, 70-ozone generator, 71-pure water. DETAILED DESCRIPTION

[0072] The present invention is further described below through specific examples.

[0073] In the following examples, the flocculation sedimentation tank, water purifier precursor excitation tank, impeller mechanical stirrer, and circulating liquid pump tubular stirrer used are all manufactured by Guangdong Foshan Yegao Environmental Protection Equipment Manufacturing Co., Ltd.; the ultrasonic generator is a commercially available product, ferrous hydroxide, ferrous carbonate, hydrogen peroxide, and oxygen are commercially available products, and the ozone generator, detection instrument device, and automated detection and feeding controller are commercially available products. In addition to the above examples, those skilled in the art can also select other products with similar performance to the above-mentioned products listed in the present invention according to routine selection, and all of them can achieve the purpose of the present invention.

[0074] Experiment on the effect of COD treatment in purified water

[0075] Potassium hydrogen phthalate was used to prepare a standard organic solution with a COD value of 500 ppm. After flocculation and sedimentation of 1 ton of water to be purified, the COD value of the resulting clear liquid was sampled and tested.

[0076] Verification test of flocculent gel in purified water

[0077] After co-precipitation of hydroxide generated by the water purifier precursor in 1 ton of water to be purified, the hydroxide generated by the water purifier precursor is mixed with the water to be purified and co-precipitated, and the purification effect is detected by turbidimeter and / or irradiation with a concentrated light source; the judgment is made specifically based on the comparison of the test results before and after the turbidimeter or the use of the light path of the purified water liquid observed from the direction of vertical incident light. If the Tyndall effect occurs, it indicates the presence of colloid.

[0078] Example 1

[0079] As shown in Figure 1, the flocculation water purification device used in this embodiment includes a flocculation sedimentation tank 1; the flocculation sedimentation tank 1 is provided with an oxidizing substance adding device 6; the oxidizing substance adding device 6 is a gas-liquid mixing device, specifically a gas-liquid mixing jet device, and its gas-liquid mixture outlet is provided in the flocculation sedimentation tank 1.

[0080] The oxidizing substance 62 used in this embodiment is oxygen, and the water purifier precursor 56 is a mixture of ferrous carbonate and ferrous hydroxide, which is added to the flocculation sedimentation tank 1 from the feeding port.

[0081] A novel flocculation water purification method comprises the following steps:

[0082] 1. Set up a flocculation water purification device as shown in Figure 1, and mix the water purifier precursor and the water to be purified in the flocculation sedimentation tank 1 according to the amount shown in Table 1;

[0083] 2. Start the oxidizing substance adding device 6, and use oxygen as the oxidizing substance to stimulate the water purifier precursor in the flocculation sedimentation tank 1, so that the water purifier precursor reacts to generate ferric hydroxide and co-precipitates with the suspended matter and / or impurities in the water body to be purified, thereby obtaining the water body after flocculation purification.

[0084] In Example 1, the pH value of the water body 60 to be purified was 7, and the water purification agent precursor used was a mixture of ferrous carbonate and ferrous hydroxide. Testing revealed that the amount of ferric hydroxide produced per cubic meter of water to be purified in this example was 100 g, and no new acid or salt was generated by the water purification agent precursor. The water purification performance data for this example are listed in Table 1.

[0085] Example 2

[0086] As shown in Figure 2, the flocculation water purification device used in this embodiment includes a flocculation sedimentation tank 1, a water purification agent precursor excitation tank 2, ultrasonic generators 4 and 5, an oxidizing substance adding device 6, process data detection devices 19 to 23, an automatic detection and feeding controller 24, a temporary storage tank 15, a solid feeder 55, and an ozone generator 70.

[0087] The liquid outlet of the water purifier precursor excitation tank 2 is connected to the flocculation sedimentation tank 1 through a pipeline equipped with a pump 26, and the liquid flow is led into the flocculation sedimentation tank 1.

[0088] Flocculation sedimentation tank 1 is equipped with a mobile ultrasonic generator 4, process data detection devices 19 and 20 (specifically, a pH meter and a liquid level gauge), a stirring device 11 (specifically, a circulating liquid pump tubular stirrer), and an oxidizing agent dosing device 6. Oxidizing agent dosing device 6 is a bubbling aeration device connected to an ozone generator to add ozone to flocculation sedimentation tank 1. A solids feeder 55 is connected to flocculation sedimentation tank 1 to add solid sodium hydroxide to adjust the pH value of the purified water. A COD detector 23 is connected to the discharge port 51 at the bottom of flocculation sedimentation tank 1 for sampling and testing the water. A sedimentation tank 1 is provided at the bottom with a sedimentation tank 10, which has a valve 40 and a discharge port 50 at its very bottom.

[0089] The water purifier precursor excitation tank 2 is provided with a fixed ultrasonic generator 5 and process data detection devices 21 and 22 (specifically, a redox potentiometer and a viscometer) integrated therewith.

[0090] The water purifier precursor excitation tank 2 is used to oxidize the mixture of the water body 60 to be purified and the water purifier precursor 56 by starting the ultrasonic generator 5; the water purifier precursor excitation tank 2 is connected to an oxidizing material adding device composed of a temporary storage tank 15 and a pump 25.

[0091] The automatic detection and feeding controller 24 controls the pump 25 to add oxidizing substances to the water purifier precursor excitation tank 2 and controls the start and stop of the ultrasonic generator 5 based on the results measured by the process data detection device 21 (redox potential meter). The pump 26 is controlled to add the mixture in the water purifier precursor excitation tank 2 to the flocculation sedimentation tank 1 based on the results measured by the process data detection device 22 (viscometer) and the process data detection device 20 (liquid level meter). The solid feeder 55 is controlled to add inorganic base to the flocculation sedimentation tank 1 to adjust the pH value of the liquid in the tank based on the results measured by the process data detection device 19 (pH meter).

[0092] In this embodiment, the oxidizing substance 62 added to the temporary storage tank 15 is hydrogen peroxide, and the oxidizing substance 63 added to the flocculation sedimentation tank 1 is ozone; the water body 60 to be purified is industrial acid-containing recycled water with a pH value of 0.2; and the water purifier precursor 56 is ferrous carbonate.

[0093] A novel flocculation water purification method comprises the following steps:

[0094] 1. Set up a flocculation water purification device as shown in Figure 2, and mix the water purifier precursor 56 and the water to be purified 60 in the water purifier precursor excitation tank 2 according to the amount shown in Table 1;

[0095] 2. Add oxidizing material 62 to temporary storage tank 15, turn on pump 25, and activate ultrasonic generator 5. Hydrogen peroxide, acting as the oxidizing material, cooperates with the ultrasonic oscillator to excite water purifier precursor 56 in water purifier precursor excitation tank 2, causing it to react and produce hydroxide. When the readings of the redox potentiometer and viscometer in water purifier precursor excitation tank 2 reach the set values, shut down pump 25, ultrasonic generator 5, and all feeding equipment.

[0096] 3. Based on the on-site detection data of the process detection devices 21 , 22 , and 19 , the pump 26 is controlled to deliver the solution in the water purification agent precursor excitation tank 2 into the flocculation sedimentation tank 1 .

[0097] 4. Start the solid feeder 55 to feed sodium hydroxide into the flocculation sedimentation tank 1 to adjust the pH of the solution in the tank to 5. Simultaneously, start the ultrasonic generator 4, the ozone generator 70, and the oxidizing substance feeding device 6 to introduce ozone into the solution in the flocculation sedimentation tank 1. Ozone acts as an oxidizing substance in conjunction with ultrasonic oscillation to further stimulate the unreacted water purifier precursor and the generated ferrous hydroxide, so that the ferric hydroxide generated by the complete reaction of the water purifier precursor is co-precipitated with suspended matter and / or impurities in the water to be purified.

[0098] 5. Open valve 41 to drain the purified water 61 in the flocculation sedimentation tank 1, and perform sampling test using a COD detector to obtain the COD value. Collect the sediment 67 in the sediment tank 10 for further treatment.

[0099] In this example, the pH of the water 60 to be purified was 0.2, and the water purifier precursor 56 used was ferrous carbonate. The pH of the purified water was 5. Testing revealed that the amount of ferric hydroxide produced per cubic meter of water to be purified was 8 g, and no new acid or salt was generated by the water purifier precursor. The water purification performance data for this example are listed in Table 1.

[0100] Example 3

[0101] As shown in FIG3 , the flocculation water purification device used in this embodiment includes a flocculation sedimentation tank 1, a temporary storage tank 15, an oxidizing material adding device 6, a solid-liquid separation device 14 and an automatic detection and feeding controller 24;

[0102] The flocculation and sedimentation tank 1 is equipped with a heat exchanger 3, an oxidizing agent dosing device 6, a stirring device 11, and process data detection devices 20-22. The oxidizing agent dosing device 6 is a gas-liquid mixing device, specifically a liquid spray absorption tower, which uses air as the oxidizing agent. The gas-liquid mixture outlet is connected to the flocculation and sedimentation tank 1. The stirring device 11 is a mechanical impeller stirrer. The process data detection devices 20-22 are a Tyndall effect detection device, a conductivity meter, and a thermometer, respectively. A solid feeder 55 is installed and connected to the flocculation and sedimentation tank 1 for adding a water purification agent precursor 56.

[0103] The temporary storage tank 15 is filled with water 60 to be purified and is connected to the flocculation sedimentation tank 1 through a pipeline provided with a process data detection device 19 (specifically a flow meter) and a pump 25.

[0104] The solid-liquid separation device 14 is a centrifuge connected to the discharge port of the flocculation sedimentation tank 1 through a valve 40 and a pump 27 , and the filtrate discharge port of the centrifuge is connected to the temporary storage tank 16 .

[0105] This embodiment uses an automatic detection and feeding controller 24 to control the pump 25 to add the water body 60 to be purified to the flocculation sedimentation tank 1 according to the results measured by the process data detection device 19, detects the treatment status of the water body 60 to be purified according to the process data detection devices 20 and 21, and controls the opening and closing of the heat exchange device 3 and adjusts the size of the heat exchange according to the results measured by the process data detection device 22.

[0106] The water purifier precursor 56 used in this embodiment is solid ferrous hydroxide.

[0107] A novel flocculation water purification method comprises the following steps:

[0108] 1. Set up a flocculation water purification device as shown in Figure 3, and mix the water purification agent precursor 56 and the water body 60 to be purified in the flocculation sedimentation tank 1 according to the amount shown in Table 1;

[0109] 2. The oxidizing agent dosing device 6 and the heat exchange device 3 are turned on, and air is used as the oxidizing agent to synergistically heat the water purifier precursor 56 in the flocculation sedimentation tank 1 to excite the water purifier precursor 56, causing the water purifier precursor 56 to react and form ferric hydroxide, which is then co-precipitated with suspended solids and / or impurities in the water body 60 to be purified;

[0110] 3. The mixture in the flocculation sedimentation tank 1 is passed through the centrifuge of the solid-liquid separation device 14 for solid-liquid separation to obtain the flocculated and purified water body 61, which is temporarily stored in the temporary storage tank 16.

[0111] In this example, the pH of the water body 60 to be purified was 5, and the water purification agent precursor used was ferrous hydroxide. Testing revealed that the amount of ferric hydroxide produced per cubic meter of water to be purified was 500 g, and no new acid or salt was generated by the water purification agent precursor. The water purification performance data for this example are listed in Table 1.

[0112] Example 4

[0113] As shown in FIG4 , the flocculation water purification device used in this embodiment includes a flocculation sedimentation tank 1; the flocculation sedimentation tank 1 is provided with an oxidizing substance adding device 6, and process data detection devices 19 and 20; the oxidizing substance adding device 6 is a gas-liquid mixing device, specifically a liquid injection device, which sprays the water body 60 to be purified into the air through a combination of a pump 27 and a nozzle (the nozzle is the liquid outlet) to chemically react with oxygen in the air. The air here is the environment containing oxidizing substances mentioned above; the process data detection devices 19 and 20 are a turbidity meter and a liquid level meter, respectively.

[0114] The flocculation sedimentation tank 1 is also connected to an oxidizing material adding device composed of a temporary storage tank 16 and a pump 26, which adds an oxidizing material 62 (specifically hydrogen peroxide) to the flocculation sedimentation tank 1 to assist the oxidation reaction of the water purifier precursor 56. That is, the device of the present invention has two sets of oxidizing material adding devices.

[0115] The flocculation sedimentation tank 1 is connected to a solid feeder 55 for feeding a water purifier precursor 56 ; it is also connected to the temporary storage tank 15 via a pump 25 to drain the water body 60 to be purified.

[0116] The solid-liquid separator 14 is an inclined tube sedimentation tank, which is connected to the discharge port of the flocculation sedimentation tank 1 through a pump 28 ; the discharge port of the solid-liquid separator 14 is connected to the temporary storage tank 17 for storing the purified water 61 .

[0117] The water purifier precursor 56 used in this embodiment is solid ferrous carbonate.

[0118] A novel flocculation water purification method comprises the following steps:

[0119] 1. Set up a flocculation water purification device as shown in Figure 4, and mix the water purification agent precursor 56 and the water body 60 to be purified in the flocculation sedimentation tank 1 according to the amount shown in Table 1;

[0120] 2. Turn on the oxidizing agent dosing device 6 and the pump 26, and use air as the oxidizing agent together with the hydrogen peroxide to stimulate the water purifier precursor 56 in the flocculation sedimentation tank 1, causing the water purifier precursor 56 to react to generate iron hydroxide and release carbon dioxide. The produced colloid is then co-precipitated with the suspended matter and / or impurities in the water body 60 to be purified.

[0121] 3. The mixture in the flocculation sedimentation tank 1 is drained to the solid-liquid separation device 14 , and the flocculated and purified water 61 is obtained by separation in the solid-liquid separation device 14 and temporarily stored in the temporary storage tank 17 .

[0122] In this example, the water body 60 to be purified had a pH of 8 and contained suspended impurities. The water purifier precursor used was ferrous carbonate, and the oxidizing substances were oxygen from air and hydrogen peroxide. Testing revealed that the amount of ferric hydroxide produced per cubic meter of water to be purified in this example was 300 g, and no new acid or salt was generated by the water purifier precursor. The water purification performance data for this example are listed in Table 1.

[0123] Example 5

[0124] As shown in FIG5 , the flocculation water purification device used in this embodiment includes a flocculation sedimentation tank 1 , an oxidizing substance adding device 6 , a liquid flow agitator 11 , a solid-liquid separator 14 , and temporary storage tanks 15 and 16 .

[0125] The flocculation sedimentation tank 1 is provided with an oxidizing substance adding device 6 and process data detection devices 19 and 20; the oxidizing substance adding device 6 is a gas-liquid mixing device, specifically a liquid injection device, which sprays the water body 60 to be purified into the air through a combination of a pump 26 and a nozzle (the nozzle is the liquid outlet) to react with oxygen in the air for oxidation. The air here is the environment containing oxidizing substances mentioned above, so that the water purifier precursor generates colloidal ferric hydroxide after the oxidation reaction; the process data detection devices 19 and 20 are a turbidity meter and a liquid level meter, respectively.

[0126] The temporary storage tank 15 is used to prepare the water purifier precursor 57 using pure water 71. It is provided with a stirring device 11 (specifically a circulating liquid pump tube stirrer) and is connected to a solid feeder 55 for adding the water purifier precursor 56. The discharge port of the temporary storage tank 15 is connected to the flocculation sedimentation tank 1 through a pump 25.

[0127] The solid-liquid separator 14 is an inclined tube sedimentation tank, which is connected to the discharge port of the flocculation sedimentation tank 1 through a pump 27 ; the discharge port of the solid-liquid separator 14 is connected to the temporary storage tank 16 for storing the purified water 61 .

[0128] The water purifier precursor 56 used in this embodiment is solid ferrous hydroxide.

[0129] A novel flocculation water purification method comprises the following steps:

[0130] 1. As shown in FIG5 , a flocculation water purification device is set up, pure water 71 is added to the temporary storage tank 15 , and the solid feeder 55 is started to add ferrous hydroxide 56 to prepare a water purification agent precursor 57 , i.e., ferrous hydroxide solution.

[0131] 2. Add the water 60 to be purified to the flocculation sedimentation tank 1, and mix the water purifier precursor 57 and the water 60 to be purified in the flocculation sedimentation tank 1 according to the amount shown in Table 1;

[0132] 3. The oxidizing agent dosing device 6 is turned on to use air as the oxidizing agent to stimulate the water purifier precursor 57 in the flocculation sedimentation tank 1, causing the water purifier precursor 57 to react to generate iron hydroxide colloid and co-precipitate with the suspended matter and / or impurities in the water body 60 to be purified.

[0133] 4. The mixture in the flocculation sedimentation tank 1 is drained to the solid-liquid separation device 14 , and the flocculated and purified water 61 is obtained by separation in the solid-liquid separation device 14 and temporarily stored in the temporary storage tank 16 .

[0134] In this embodiment, the water body 60 to be purified had a pH of 6.9 and contained suspended impurities. The water purifier precursor used was liquid ferrous hydroxide. Testing revealed that the amount of ferric hydroxide produced per cubic meter of water to be purified in this embodiment was 0.002 g, and no new acid or salt was generated by the water purifier precursor. The water purification performance data for this embodiment are listed in Table 1. This embodiment has simple equipment and operation, and no carbon dioxide or other impurities are generated during the process, making it suitable as a city tap water purification solution.

[0135] Example 6

[0136] As shown in Figure 6, the flocculation water purification device used in this embodiment includes a flocculation sedimentation tank 1, a water purification agent precursor excitation tank 2, an oxidizing substance adding device 6, an oxidizing substance adding device 7, an oxidizing substance adding device 8, a stirring device 11, and a solid-liquid separator 14.

[0137] The water purifier precursor excitation tank 2 is provided with an oxidizing substance adding device 6 and a stirring device 11 (specifically a paddle stirring device). The oxidizing substance adding device 6 is a gas-liquid mixing device, specifically a liquid injection device, which is provided with a nozzle (i.e., a liquid outlet) facing the flocculation sedimentation tank 1. Through the combination of a compressed gas source 29 and the nozzle, a mixture of the water purifier precursor 56 and pure water 71 is sprayed into the air to react with oxygen in the air for oxidation. The air here is the environment containing oxidizing substances mentioned above, and the liquid flow is led to the flocculation sedimentation tank 1. The compressed gas source 29 is specifically a high-pressure gas tank filled with compressed air.

[0138] The flocculation sedimentation tank 1 is provided with an oxidizing substance adding device 7 and an oxidizing substance adding device 8; the oxidizing substance adding device 7 is a gas-liquid mixing device, specifically an aeration device, which is provided with a gas oxidizing substance outlet, forcing air into the water body 60 to be purified; the oxidizing substance adding device 8 is a gas-liquid mixing device, specifically an aeration device, which is composed of an air pump and a connecting channel, and injects air into the water body 60 to be purified; the oxidizing substance adding device 7 and the oxidizing substance adding device 8 cause the unreacted water purifier precursor in the flocculation sedimentation tank 1 to undergo an oxidation reaction with oxygen in the air to generate colloidal ferric hydroxide.

[0139] The solid-liquid separator 14 is a filter press device, which is connected to the discharge port of the flocculation sedimentation tank 1 via a pump 26 .

[0140] The water purifier precursor 56 used in this embodiment is solid ferrous carbonate.

[0141] A novel flocculation water purification method comprises the following steps:

[0142] 1. Set up a flocculation water purification device as shown in FIG6 , and add pure water 71 and ferrous carbonate 56, a precursor of the water purification agent, into the water purification agent precursor excitation tank 2 .

[0143] 2. Adding water 60 to be purified to the flocculation sedimentation tank 1;

[0144] 3. Add water purifier precursor 56 to water purifier precursor excitation tank 2 in the amount shown in Table 1, start oxidizing substance adding device 6, use air as the oxidizing substance to excite water purifier precursor 56, and direct the liquid flow into flocculation sedimentation tank 1; start oxidizing substance adding device 7 and oxidizing substance adding device 8 to excite unreacted water purifier precursor 56 in flocculation sedimentation tank 1; allow water purifier precursor 56 to react to generate iron hydroxide colloid and co-precipitate with suspended matter and / or impurities in water body 60 to be purified.

[0145] 4. The mixture in the flocculation sedimentation tank 1 is drained to the solid-liquid separation device 14 , and separated by the solid-liquid separation device 14 to obtain the flocculated and purified water body 61 .

[0146] In this example, the water body 60 to be purified had a pH of 7 and contained suspended impurities. Ferrous carbonate was used as the water purification agent precursor. Testing revealed that 50 g of ferric hydroxide was generated per cubic meter of water to be purified. No new acid or salt was observed due to the water purification agent precursor. The water purification performance data for this example are listed in Table 1.

[0147] Comparative Example 1

[0148] The flocculation water purification device of Example 1 was used, and the water to be purified was the same as that in Example 1. Acidic ferric sulfate was added to the water to be purified according to the amount of iron element shown in Table 1. During the purification process, sodium hydroxide solution was added to adjust the pH value of the mixed solution to 7, so that all iron ions in the mixed solution were hydrolyzed into ferric hydroxide, which was co-precipitated with the impurities.

[0149] Testing revealed that the amount of ferric hydroxide produced per cubic meter of water to be purified in this comparative example was 100 g. The sodium hydroxide solution added during the process reacted with the acidic ferric sulfate to form sodium sulfate. The purification performance data for this comparative example are listed in Table 1.

[0150] Comparative Example 2

[0151] The apparatus for treating water to be purified in Example 3 was used, and the water to be purified was the same as that in Example 3. Acidic ferric sulfate was added to the water to be purified according to the amount of iron element shown in Table 1. During the purification process, sodium hydroxide was added to adjust the pH value of the water to be purified to 5.

[0152] Testing revealed that the amount of ferric hydroxide produced per cubic meter of water to be purified in this comparative example was 500 g. The sodium hydroxide added during the process reacted with acidic ferric sulfate to form sodium sulfate. The purification performance data for this comparative example are listed in Table 1.

[0153] Comparative Example 3

[0154] The apparatus for treating water to be purified in Example 5 was used, and the water to be purified was the same as that in Example 5. Acidic ferric chloride was added to the water to be purified according to the amount of iron element shown in Table 1. During the purification process, sodium hydroxide was added to adjust the pH value of the treated water to 6.9.

[0155] Testing revealed that the amount of ferric iron (III) produced in this comparative example per cubic meter of water to be purified was 0.002 g. The sodium hydroxide added during the process reacted with the acidic ferric chloride to produce new sodium chloride. The purification performance data for this comparative example are listed in Table 1.

[0156] Comparative Example 4

[0157] The apparatus of Example 2 was used to treat water with a pH of 0.2 using the amounts shown in Table 1 and the method of Example 2. The difference from Example 2 was that no inorganic base was added to the flocculation sedimentation tank 1 to adjust the pH of the liquid.

[0158] The test results show that the amount of ferric hydroxide produced per cubic meter of water to be purified in this comparative example is 0.001 g. The purification effect data of this comparative example are listed in Table 1.

[0159] Comparative Example 5

[0160] The apparatus of Example 5 was used to treat the water body with a pH of 6.9 according to the amount shown in Table 1 and the method of Example 5, and the water purification effect data are listed in Table 1.

[0161] The test results show that the amount of ferric hydroxide produced per cubic meter of water to be purified in this comparative example is 0.001 g. The purification effect data of this comparative example are listed in Table 1.

[0162] Comparative Example 6 uses the device for treating water to be purified in Example 6, and the water to be purified is the same as that in Example 6. Ferrous carbonate, a precursor of the water purifier, is added to the water to be purified in the amount shown in Table 1.

[0163] The test results show that the amount of ferric hydroxide produced per cubic meter of water to be purified in this comparative example is 650 g. The purification effect data of this comparative example are listed in Table 1.

[0164] Table 1

[0165] As shown in Table 1 above, Example 1 and Comparative Example 1, Example 3 and Comparative Example 2, and Example 5 and Comparative Example 3 all achieved similar treatment effects on the water being purified, given the same amount of iron from the hydroxide. While newly generated salts were present in Comparative Examples 1-3, the water purifier precursors of the present invention did not introduce any new anions already present in the water. This demonstrates that the process of the present invention can achieve state-of-the-art results without generating acid and / or salts during flocculation purification.

[0166] The difference between Example 2 and Comparative Example 4 is that the former adjusts the pH value of the water to be treated in the tank to ≥2 by adding inorganic base solid to the flocculation sedimentation tank 1, while the latter does not adjust the pH value of the water to be treated, resulting in the conversion of part of the iron hydroxide into iron salts, reducing the amount of iron hydroxide colloid, thereby affecting the water treatment effect.

Claims

1. A new type of freshwater flocculation method, characterized in that: The following steps are involved: (1) mixing a water purifier precursor with a liquid, performing an excitation treatment, and then adding the mixture to the water to be purified, so that the water purifier precursor reacts to generate ferric hydroxide, which is then co-precipitated with suspended matter and / or impurities in the water to be purified; The excitation treatment includes adding an oxidizing substance; (2) The mixture obtained in step (1) is subjected to solid-liquid separation to obtain a water body after flocculation purification treatment.

2. A new type of freshwater flocculation method, characterized in that: The following steps are involved: (1) A water purifier precursor is directly mixed with the water to be purified and subjected to an excitation treatment, so that the water purifier precursor reacts to generate ferric hydroxide, which is then co-precipitated with suspended matter and / or impurities in the water to be purified; The excitation treatment includes adding an oxidizing substance; (2) The mixture obtained in step (1) is subjected to solid-liquid separation to obtain a water body after flocculation purification treatment.

3. The new flocculation water purification method according to claim 1, characterized in that: When the water purifier precursor is mixed with the liquid and subjected to an excitation treatment and then added to the water body to be purified, the water purifier precursor is directly mixed with the water body to be purified and subjected to an excitation treatment.

4. The new flocculation water purification method according to claim 1, 2 or 3, characterized in that: The water purifier precursor is ferrous carbonate and / or ferrous hydroxide; the liquid is any one or a combination of water purifier precursor aqueous solution, pure water, and water to be purified.

5. The new flocculation water purification method according to claim 4, characterized in that: The oxidizing substance is one or a combination of oxygen, air, ozone, and hydrogen peroxide.

6. The new flocculation water purification method according to claim 5, characterized in that: When the oxidizing substance in step (1) comprises at least one gaseous oxidizing substance selected from oxygen, air, and ozone, the gaseous oxidizing substance is added to the liquid mixed with the water purifier precursor by at least one method selected from the group consisting of jetting, spraying, aeration, aeration, and liquid injection; The liquid injection method is specifically as follows: the liquid mixed with the water purifier precursor is injected upwards by pressure so that it passes through an environment containing gaseous oxidizing substances and falls into the water body to be purified; or the liquid mixed with the water purifier precursor is mixed with at least one of the oxidizing substances and injected upwards by pressure so that it passes through an environment containing gaseous oxidizing substances and falls into the water body to be purified, and the oxidation reaction of the water purifier precursor is realized by fully contacting the mixture with the gaseous oxidizing substances during the process of falling from a height.

7. The new flocculation water purification method according to claim 6, characterized in that: The excitation treatment in step (1) is a combination of adding an oxidizing substance and one or more of heating and ultrasonic vibration.

8. The new flocculation water purification method according to claim 7, characterized in that: In step (1), the amount of iron from ferrous carbonate, a precursor of the water purifier, mixed in each liter of the water to be purified is ≤300 g, and the amount of iron from ferrous hydroxide, a precursor of the water purifier, mixed in each liter of the water to be purified is ≤500 g, and the amount of iron from the water purifier precursor is ≥0.002 g.

9. The new flocculation water purification method according to claim 8, characterized in that: In step (1), the pH value of the water to be purified is set to ≥ 2 to obtain a better flocculation effect.

10. A flocculation water purification device suitable for the new flocculation water purification method according to any one of claims 1 to 9, comprising a flocculation sedimentation tank, characterized in that: An oxidizing material adding device is added, and the oxidizing material adding device is provided with at least one of a liquid oxidizing material outlet, a gaseous oxidizing material outlet, and a liquid outlet; the oxidizing material adding device is connected to the flocculation sedimentation tank or is arranged therein, Used to add oxidizing substances into the flocculation sedimentation tank.

11. A flocculation water purification device suitable for the new flocculation water purification method according to any one of claims 1 to 9, comprising a flocculation sedimentation tank, characterized in that: A water purifier precursor excitation tank is added to form a combination with the flocculation sedimentation tank; The water purifier precursor excitation tank is used to excite the water purifier precursor; An oxidizing substance adding device is provided for the water purifier precursor excitation tank, or an oxidizing substance adding device is provided for both the flocculation sedimentation tank and the water purifier precursor excitation tank; the oxidizing substance adding device is connected to or provided in the corresponding water purifier precursor excitation tank and / or flocculation sedimentation tank, and is used to add oxidizing substance into the water purifier precursor excitation tank and / or flocculation sedimentation tank; the oxidizing substance adding device is provided with at least one of a liquid oxidizing substance outlet, a gaseous oxidizing substance outlet, and a liquid outlet; The liquid outlet of the water purifier precursor excitation tank is connected to the flocculation sedimentation tank through a pipeline, or the liquid flow is led to the flocculation sedimentation tank through the liquid outlet of the oxidizing substance adding device arranged in the water purifier precursor excitation tank toward the flocculation sedimentation tank.

12. The flocculation water purification device according to claim 10 or 11, characterized in that: The oxidizing material adding device is a liquid oxidizing material adding device composed of a temporary storage tank and a pump, and a gas-liquid mixing device for mixing the gaseous oxidizing material with the water to be purified; The gas-liquid mixing device is at least one selected from a gas-liquid mixing jet device, a liquid spray absorption tower, an aeration device, an aeration device, and a liquid injection device.

13. The flocculation water purification device according to claim 12, characterized in that: The liquid oxidizing material adding device is provided with a liquid oxidizing material outlet, the aerating device is provided with a gaseous oxidizing material outlet, the gas-liquid mixing jet device and the liquid spray absorption tower are both provided with a liquid outlet, the aeration device is provided with a gaseous oxidizing material outlet or a liquid outlet, and the liquid injection device is provided with a liquid outlet; The aeration device is a combination of an air pump / compressed gas source and a connecting channel; the liquid injection device is composed of a pipe equipped with a pump and / or a compressed gas source and a nozzle, which sprays the water to be purified into an environment containing gaseous oxidizing substances for chemical reaction through the combination of the pump and / or compressed gas source and the nozzle.

14. The flocculation water purification device according to claim 13, characterized in that: The flocculation sedimentation tank and / or the water purifier precursor excitation tank is further provided with at least one of a cold and heat exchange device and an ultrasonic generator.

15. The flocculation water purification device according to claim 14, characterized in that: A sedimentation tank is added at the bottom of the flocculation sedimentation tank, and the flocculation sedimentation tank is provided with a discharge port at a position higher than the sedimentation tank; the sedimentation tank is an inverted cone structure, and a discharge port is provided at the bottom thereof.

16. The flocculation water purification device according to claim 15, characterized in that: A stirring device is added to the flocculation sedimentation tank and / or the water purifier precursor excitation tank to promote uniform mixing of the water purifier precursor and / or the hydroxide converted therefrom with the water to be purified; The stirring device is specifically one or more of an impeller mechanical stirrer and a circulating liquid flow pump tube stirrer.

17. The flocculation water purification device according to claim 16, characterized in that: A solid-liquid separation device is additionally provided, which is connected to the discharge port of the flocculation sedimentation tank and is used for performing solid-liquid separation on the mixture in the flocculation sedimentation tank.

18. The flocculation water purification device according to claim 17, characterized in that: A temporary storage tank is added, which is directly connected to the flocculation sedimentation tank and / or the water purification agent precursor excitation tank and / or the solid-liquid separation device or connected through a pump or a solid feeder, and is used to load materials to be involved in water purification treatment, or temporarily store materials from the water purification process and afterwards.

19. The flocculation water purification device according to claim 17, characterized in that: A process data detection device is installed in the flocculation sedimentation tank and / or the water purification agent precursor excitation tank; the process data detection device includes at least one of a liquid level meter, a hydrometer, a viscometer, a turbidity meter, a pH meter, a conductivity meter, a redox potentiometer, a flow meter, a Tyndall effect detection device and a COD detector; A process data detection device and an automatic detection and feeding controller are installed in the flocculation sedimentation tank and / or the water purification agent precursor excitation tank. The automatic detection and feeding controller is used to receive data from the process data detection device, and automatically control the operation of the entire flocculation water purification device based on the obtained data.

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