Water pollution detection and treatment equipment and method

Abstract

The invention belongs to the technical field of chemical treatment of wastewater, and particularly relates to water pollution detection and treatment equipment and a water pollution detection and treatment method, so that ionic and free ammonia nitrogen pollutants contained in wastewater are respectively removed in a settling zone and a crystallizing zone, the content of solid particle impurities in the wastewater is reduced, and the quality of the wastewater is improved. Ammonia nitrogen pollutants in the wastewater are fully removed; in addition, the main component of superfine nanoscale particles left after zirconium oxide production and filtration in the wastewater is zirconium hydroxide particles which can be used as crystallization nuclei for crystallization reaction of ammonium bicarbonate substances, so that the crystallization reaction is accelerated, and the condition that reaction equipment is scaled due to the fact that the zirconium hydroxide particles are adhered to the inner wall of a crystallization region is reduced; meanwhile, zirconium hydroxide particles of superfine nanoscale particles are crystallized to be combined with ammonium bicarbonate substances, and are agglomerated and agglomerated mutually, so that the particles are enlarged, and later filtration and separation are facilitated, so that the content of solid particle impurities in the wastewater is reduced, and the zirconium hydroxide particles in the wastewater are recycled more sufficiently.

Description

Technical Field

[0001] The present invention belongs to the technical field of chemical treatment of wastewater, and specifically relates to a water pollution detection and treatment device and method. Background Art

[0002] At present, zirconia production enterprises mostly use the chemical co - precipitation method to produce zirconia. Its main production raw materials are zirconium oxychloride and ammonia water, and a large amount of water is used for washing and dehydration, thus generating high - concentration ammonia - nitrogen wastewater. Moreover, the zirconium oxychloride particles prepared by the chemical co - precipitation method belong to ultrafine powder. During the filtration and washing process, inevitably, some zirconium oxychloride particles remain in the wastewater as impurities in the wastewater, and because the particles are too small, it is difficult to fully remove them.

[0003] For ammonia - nitrogen pollutants in wastewater, existing treatment methods include the stripping method. Utilizing the volatile property of ammonia - nitrogen, after adjusting the wastewater to be alkaline, ammonia will dissociate and escape from the wastewater, and blowing away the ammonia gas with air or steam can achieve the removal of ammonia - nitrogen in the wastewater. However, this method has disadvantages such as large consumption of air or steam, high power consumption, high cost, poor operating environment in the production workshop, and high safety risks. Moreover, it is difficult to effectively remove the ammonium salt part in the ionic state in the wastewater.

[0004] The chemical precipitation method, as a relatively common method in modern ammonia - nitrogen removal technology, adds a certain proportion of phosphate and magnesium salt to the ammonia - nitrogen - containing wastewater to react with ammonia - nitrogen to form magnesium ammonium phosphate precipitate, thereby removing ammonia - nitrogen pollutants in the wastewater. However, in this treatment method, the free ammonia gas is released to the outside, which is likely to cause pollution to the surrounding atmospheric environment. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve the above - mentioned technical problems, the present invention proposes a water pollution detection and treatment device and method.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: The present invention proposes a water pollution detection and treatment device, including a reaction tank and a detection device. A partition is arranged at the middle position inside the reaction tank, and the partition divides the inside of the reaction tank into a precipitation area and a crystallization area. A first stirrer is arranged inside the precipitation area, and a second stirrer is arranged inside the crystallization area.

[0007] A transfer pipe is arranged in the area above the partition, and the transfer pipe connects the precipitation area and the crystallization area on both sides; an aerator is arranged at the bottom of the crystallization area, and a cooling system is arranged on the side wall of the crystallization area.

[0008] A current - limiting ring is arranged inside the precipitation area around the stirring blades of the first stirrer, and the current - limiting ring is connected to the top of the precipitation area through a connecting rod.

[0009] Preferably, a restriction area is provided at the bottom of the precipitation area, an interception layer is provided at the top of the restriction area, the interception layer includes a fixed plate and a movable plate, the fixed plate and the movable plate are distributed alternately, the fixed plate is fixedly connected to the side wall of the restriction area, and the top of the fixed plate is arc-shaped, and the movable plate is connected to the output end of a rotating device in the inner wall of the restriction area.

[0010] Preferably, a reflux cavity is provided at a position corresponding to the restriction area inside the partition board, the reflux cavity communicates with the inside of the restriction area through a communication hole, and an interception net is provided inside the communication hole; the reflux cavity communicates with an annular cavity provided inside the current-limiting ring through a reflux pipe, and mixing holes are uniformly provided on the inner wall of the current-limiting ring, and the mixing holes communicate with the inside of the annular cavity.

[0011] Preferably, an atomization cavity is provided at the top of the crystallization area, atomization nozzles are uniformly provided at the bottom of the atomization cavity, and the water source for the atomization nozzles to release water mist downward comes from the wastewater in the bottom area of the crystallization area; the upper side area of the liquid surface in the precipitation area communicates with the inside of the crystallization area through an air extraction device.

[0012] A water pollution detection and treatment method, the treatment method uses the above-mentioned water pollution detection and treatment equipment, and the specific steps of the treatment method are as follows:

[0013] S1: Feed the wastewater generated in the zirconia production process into the precipitation area inside the reaction tank, extract a wastewater sample and use a detection device to detect the concentration of ammonia nitrogen pollutants therein, calculate the amounts of magnesium salt and phosphate agents to be added based on the concentration of ammonia nitrogen pollutants and add and mix them;

[0014] S2: Add a flocculant to the precipitation area, and use a first stirrer to stir the wastewater for 30 - 50 minutes, then turn off the first stirrer and keep the wastewater in the precipitation area still for 6 - 8 hours;

[0015] S3: Transfer a part of the supernatant in the precipitation area to the crystallization area through a pumping device, filter the remaining precipitate mixture in the precipitation area to separate the solid precipitate and the supernatant part, and feed the wastewater supernatant part into the crystallization area;

[0016] S4: Feed CO 2 steam into the crystallization area from an aerator provided at the bottom of the crystallization area to heat the internal environment of the crystallization area, and cooperate with a cooling system provided on the side wall of the crystallization area to control the reaction environment temperature inside the crystallization area at 60 - 80 °C;

[0017] S5: During the internal reaction process in the crystallization zone, the internal wastewater is stirred by the second stirrer installed inside the crystallization zone, and the stirring time is maintained for 5 - 8 h. After the reaction ends, the stirring is stopped, and the cooling system is controlled to lower the internal temperature of the crystallization zone to 0 - 10 °C. Then, it is left standing for 3 - 5 h, and the internal wastewater of the crystallization zone is pumped out and filtered again to separate the crystalline substances and the supernatant. The pH value of the supernatant is adjusted to the discharge standard.

[0018] Preferably, in the above step S2, the magnesium salt used is MgCL 2 , and the phosphate salt used is Na 3 PO 4 ·6H 2 O.

[0019] Preferably, the flocculant used in the above step S2 is zirconium hydroxide hydrate.

[0020] Preferably, in the above step S2, for the wastewater inside the precipitation zone, the pH value of the wastewater is maintained in the range of 9 - 10 through acid-base adjustment reagents.

[0021] The beneficial effects of the present invention are as follows:

[0022] For the water pollution detection and treatment equipment and method described in the present invention, the wastewater removes the ionic and free ammonia nitrogen pollutants contained therein respectively in the precipitation zone and the crystallization zone, and reduces the content of solid particle impurities in the wastewater, so that the ammonia nitrogen pollutants in the wastewater are fully removed. And the main component of the ultra-fine nano-scale particles remaining after the production and filtration of zirconium oxide in the wastewater is zirconium hydroxide particles, which can be used as the crystallization nuclei for the crystallization reaction of ammonium bicarbonate substances. While accelerating the crystallization reaction, it reduces the situation of scaling on the inner wall of the reaction equipment caused by adhesion.

[0023] At the same time, for the zirconium hydroxide particles of ultra-fine nano-scale, crystallization combines them with ammonium bicarbonate substances, and they agglomerate with each other to make the particles larger, which is convenient for later filtration and separation, thereby reducing the content of solid particle impurities in the wastewater and making the recovery of zirconium hydroxide particles in the wastewater more sufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 is the flow chart of the treatment method of the present invention;

[0026] Figure 2 is the cross-sectional view of the treatment equipment in the present invention;

[0027] Figure 3 is Figure 2 the partial enlarged view at A in

[0028] In the figure: reaction tank 1, partition 11, transfer pipe 111, reflux chamber 112, communication hole 113, reflux pipe 114, precipitation area 12, crystallization area 13, aerator 131, atomization chamber 132, atomizing nozzle 133, air extraction device 134, first stirrer 14, second stirrer 15, restriction area 16, fixed plate 161, movable plate 162, current limiting ring 2, annular chamber 21, mixing hole 211. Detailed implementation mode

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0030] Embodiment 1:

[0031] As shown in the attached drawings of the specification Figures 1-3 shown, a water pollution detection and treatment device includes a reaction tank 1 and a detection device. A partition 11 is arranged at the middle position inside the reaction tank 1. The partition 11 divides the inside of the reaction tank 1 into a precipitation area 12 and a crystallization area 13. A first stirrer 14 is arranged inside the precipitation area 12, and a second stirrer 15 is arranged inside the crystallization area 13. Both the first stirrer 14 and the second stirrer 15 here adopt electric stirrers in the prior art. The rotating rod vertically extending into the precipitation area 12 or the crystallization area 13 is driven by a motor to rotate, driving the uniformly arranged stirring blades on both sides to rotate, realizing the stirring and mixing of the internal liquid substances and promoting the normal progress of the reaction;

[0032] A transfer pipe 111 is arranged in the upper area of the partition 11. The transfer pipe 111 communicates with the precipitation area 12 and the crystallization area 13 on both sides. The existing pump equipment arranged inside the transfer pipe 111 realizes the material exchange between the precipitation area 12 and the crystallization area 13. An aerator 131 is arranged at the bottom of the crystallization area 13, and a cooling system is arranged on the side wall of the crystallization area 13. The cooling system here can adopt the existing crystallization cooling system;

[0033] A current limiting ring 2 is arranged inside the precipitation area 12 around the stirring blades of the first stirrer 14. The current limiting ring 2 is connected to the top of the precipitation area 12 through a connecting rod. The current limiting ring 2 is suspended and close to the bottom of the precipitation area 12, and there is a gap between the bottom of the current limiting ring 2 and the inside of the precipitation area 12.

[0034] The detection equipment includes detection instruments such as ammonia nitrogen detectors, which detect the extracted wastewater samples, analyze the pollutant concentrations therein, and configure corresponding treatment reagents according to the pollutant concentrations; during different stages of the wastewater purification process, wastewater samples are collected multiple times for detection, and the purification measures are adjusted correspondingly through the changes in pollutant concentrations, thereby improving the purification efficiency of the wastewater.

[0035] There are multiple possible implementation schemes for the specific treatment means of zirconia chemical wastewater. Here is a possible implementation scheme:

[0036] A water pollution detection and treatment method, and the specific steps of the treatment method are as follows:

[0037] S1: Send the wastewater generated during the zirconia production process into the precipitation area 12 inside the reaction tank 1. Extract wastewater samples and use the detection equipment to detect the ammonia nitrogen pollutant concentration therein. Calculate the amounts of magnesium salt and phosphate reagents to be added based on the ammonia nitrogen pollutant concentration and add and mix them.

[0038] S2: Add a flocculant into the precipitation area 12, and use the first stirrer 14 to stir the wastewater. The stirring time is 30 - 50 min. Then turn off the first stirrer 14 and keep the wastewater in the precipitation area 12 standing still for 6 - 8 h.

[0039] S3: Transfer the supernatant part inside the precipitation area 12 to the crystallization area 13 through a pumping device. Filter the remaining precipitate mixture inside the precipitation area 12 to separate the solid precipitate and the supernatant part, and send the wastewater supernatant part into the crystallization area 13.

[0040] S4: Send CO 2 steam into the crystallization area 13 from the aerator 131 arranged at the bottom of the crystallization area 13 to heat the internal environment of the crystallization area 13. Cooperate with the cooling system arranged on the side wall of the crystallization area 13 to control the reaction environment temperature inside the crystallization area 13 at 60 - 80 °C.

[0041] S5: During the reaction process inside the crystallization area 13, use the second stirrer 15 arranged inside the crystallization area 13 to stir the internal wastewater, and keep the stirring time at 5 - 8 h; after the reaction ends, stop stirring, control the cooling system to reduce the temperature inside the crystallization area 13 to 0 - 10 °C, stand still for 3 - 5 h, pump out the wastewater inside the crystallization area 13 and filter it again to separate the crystals and the supernatant part, and adjust the pH value of the supernatant part to the discharge standard.

[0042] In the above-mentioned treatment method, this application selects to send the wastewater into the sedimentation area 12. By adding magnesium salts and phosphate agents, and adjusting the wastewater inside the sedimentation area 12 with acid-base adjustment reagents, including sodium hydroxide adjustment agents, the pH value of the wastewater is kept within the range of 9-10 during the reaction process.

[0043] At this time, a series of reactions occur in the wastewater to promote the formation of magnesium salt precipitates of ammonia nitrogen pollutants in the wastewater. For example: The addition amounts of magnesium salts and phosphates are based on the content in the wastewater to ensure that the contents of various components in the wastewater are controlled at: With the action of the flocculant, this can accelerate the concentrated downward settlement of magnesium salt precipitates, thereby removing the ionic ammonia nitrogen pollutants in the wastewater; the zirconium hydroxide particles contained in the wastewater also have the function of adsorbing impurities and promoting the flocculation and precipitation of fixed impurities. Therefore, while accelerating the concentrated precipitation of magnesium salts inside with the flocculant, the content of the original solid particles in the wastewater is also reduced;

[0044] Subsequently, after the wastewater is statically stratified, the clear liquid part and the precipitation part inside the sedimentation area 12 are separated through the transfer pipe 111, so that the wastewater in the clear liquid part enters the crystallization area 13; at this time, the ammonia nitrogen pollutants in the wastewater entering the crystallization area 13 mainly exist in the form of free ammonia water. Therefore, heated high-temperature CO 2 steam is sent in through the aerator 131. With the agitation effect, it promotes the reaction of free ammonia with the inflowing CO 2 steam. With the heating device arranged on the side wall of the crystallization area 13 to ensure the internal reaction environment, the main reaction is: NH 3 ·H 2 O + CO 2 = NH 4 HCO 3 ; in this way, the remaining free ammonia nitrogen pollutants are transformed into ammonium bicarbonate substances. After the reaction is sufficient, by starting the second stirrer 15 and the cooling system, the wastewater inside the crystallization area 13 is vigorously stirred to promote the reaction, and at the same time, by the way of cooling crystallization, the ammonium bicarbonate substances are transformed into the crystalline state;

[0045] During this process, because the main component of the ultra-fine nano-scale particles remaining after the production of zirconium oxide in the wastewater is zirconium hydroxide particles, which can be used as the crystal nuclei for the crystallization reaction of ammonium bicarbonate substances, while accelerating the crystallization reaction, it reduces the situation of scaling on the inner wall of the crystallization area 13 caused by adhesion; at the same time, for the zirconium hydroxide particles of ultra-fine nano-scale, crystallization combines them with ammonium bicarbonate substances, and they agglomerate and clump together to make the particles larger, which is convenient for later filtration and separation, thereby reducing the content of solid particle impurities in the wastewater and making the recovery of zirconium hydroxide particles in the wastewater more complete.

[0046] In the precipitation zone 12 and the crystallization zone 13, the ionic and free ammonia nitrogen pollutants contained in the wastewater are removed respectively, and the content of solid particle impurities in the wastewater is reduced, so that the ammonia nitrogen pollutants in the wastewater are fully removed. In the subsequent post-treatment such as pH adjustment, the concentration of ammonia nitrogen pollutants in the treated wastewater is detected by a detection device. If it meets the discharge standard, it can be discharged normally or recycled.

[0047] Furthermore, in order to promote the reaction between the ammonia nitrogen pollutants in the wastewater and the added treatment reagents mainly magnesium salts and phosphate agents, a flow-limiting ring 2 is arranged at the bottom of the precipitation zone 12, and the flow-limiting ring 2 surrounds the stirring blades of the middle first stirrer 14; when adding the wastewater, ensure that the wastewater can submerge the flow-limiting ring 2. In this way, when the first stirrer 14 is started after adding the treatment reagents, because the stirring blades are inclined, as the stirring blades rotate, the wastewater located inside the flow-limiting ring 2 is pushed to flow downward rapidly. After being blocked by contacting the bottom of the precipitation zone 12, it flows to both sides, and then flows upward through the gap area between the inner wall of the precipitation zone 12 and the flow-limiting ring 2. After flowing to the upper side area of the flow-limiting ring 2, it flows into the inside of the flow-limiting ring 2 due to the pressure difference, thus realizing continuous circulating flow. Such a flow promotes the mutual flow and exchange between the wastewater in different vertical regions in the vertical direction; in the horizontal direction, the wastewater at the bottom of the precipitation zone 12 flows from the middle to both sides, and the wastewater at the top of the precipitation zone 12 flows from both sides to the middle, which promotes the full flow and mixing of the wastewater and the treatment reagents in different regions inside the precipitation zone 12, so that the ammonia nitrogen pollutants in the wastewater are fully contacted with the treatment reagents and then form precipitates and are separated out;

[0048] Furthermore, because the zirconia particles have a relatively large density and are easy to settle down to the bottom of the precipitation zone 12, during the process that the wastewater impacts downward and flows upward under the guiding action of the flow-limiting ring 2, the zirconia particles and the like in the bottom area are driven upward. The zirconia particles can serve as condensation nuclei, and coupled with the adsorption effect of the zirconia particles, they can promote the precipitation of pollutants such as magnesium salts to combine with them during the flowing process. After the stirring ends, larger precipitates are formed to accelerate the sedimentation of the pollutants and fully separate them out. In this way, while improving the purification efficiency of the zirconia particles, they are also fully utilized.

[0049] Example Two:

[0050] Based on the above-mentioned first embodiment, a restriction area 16 is provided at the bottom of the precipitation area 12. An interception layer is provided at the top of the restriction area 16. The interception layer includes a fixed plate 161 and a movable plate 162. The fixed plate 161 and the movable plate 162 are distributed alternately. The fixed plate 161 is fixedly connected to the side wall of the restriction area 16, and the top of the fixed plate 161 is arc-shaped. The movable plate 162 is connected to the output end of a rotating device in the inner wall of the restriction area 16. The rotating device here can be a motor device and is controlled by an external controller;

[0051] In the initial stage of purification, when the wastewater flows in, the interception layer of the restriction area 16 remains open, and the movable plate 162 therein remains vertical. The wastewater can flow freely on both the upper and lower sides of the interception layer and exchange fully. After adding the treatment reagent and starting the first stirrer 14 to make the treatment reagent fully combine with the ammonia nitrogen pollutants in the wastewater, the first stirrer 14 is turned off to promote the aggregation of the magnesium salt pollutants formed in the wastewater and accelerate their downward settlement. The pollutant precipitates pass through the interception layer and enter the restriction area 16, where they continue to accumulate. After waiting for a period of time, the wastewater sample is detected. When it is detected that the concentration of ammonia nitrogen pollutants in the wastewater has not dropped to the predetermined range, the treatment reagent can be added continuously. At this time, the rotating device is started to drive the movable plate 162 to rotate to the horizontal state. At this time, the interception layer remains closed. Then the first stirrer 14 is started. The stirring effect on the wastewater promotes the mixing of chemical reagents and the precipitation and separation of pollutants, and the stirring effect is blocked outside the restriction area 16 to prevent the stirring effect from affecting the pollutant precipitates that have already precipitated inside the restriction area 16 again and causing them to dissolve into the wastewater again;

[0052] Further, a reflux cavity 112 is provided at a position corresponding to the restriction area 16 inside the partition 11. The reflux cavity 112 communicates with the inside of the restriction area 16 through a communication hole 113. An interception net is provided inside the communication hole 113. The reflux cavity 112 communicates with an annular cavity 21 provided inside the current limiting ring 2 through a reflux pipe 114. Mixing holes 211 are uniformly provided on the inner wall of the current limiting ring 2, and the mixing holes 211 communicate with the inside of the annular cavity 21. The pump device inside the reflux pipe 114 is started to make part of the liquid inside the restriction area 16 flow into the reflux pipe 114 through the interception net, and then flow into the annular cavity 21 inside the current limiting ring 2. At the same time, the wastewater above the interception layer penetrates downward from the gap between the movable plate 162 and the fixed plate 161 to supplement the part flowing out of the restriction area 16 and maintain the water pressure balance. The zirconia particles and ammonia nitrogen pollutants aggregated in this part of the liquid are mixed into the agitated wastewater again from the uniformly arranged mixing holes 211 on the inner wall of the current limiting ring 2. The zirconia particles can promote the precipitation and aggregation settlement of pollutants therein, and the ammonia nitrogen pollutants react fully with the treatment reagent, so that the wastewater inside the precipitation area 12 is fully purified;

[0053] After repeating the operation of adding the treatment reagent multiple times, open the interception layer. After sedimentation for a period of time, close the interception layer again. Draw the supernatant part above the interception layer through the transfer pipe 111 to participate in the treatment of the crystallization zone 13; for the precipitated impurities in the restricted zone 16, after filtering and separating the solid precipitate in the subsequent treatment, the separated liquid part is participated in the next zirconia wastewater purification treatment process.

[0054] Example Three:

[0055] On the basis of the above Example One, in the S2 step of performing precipitation treatment inside the precipitation zone 12 in this application, the chemical agent magnesium salt added can be selected as MgCL 2 , and the phosphate can be selected as Na 3 PO 4 ·6H 2 O. The flocculant for accelerating precipitation can directly select hydrated zirconium hydroxide; hydrated zirconium hydroxide, as an intermediate in zirconia production, is easily obtained in the production factory, and the input amount is 20 - 30 mg / L according to the wastewater content; because hydrated zirconium hydroxide is the same as the main solid particle impurities in the wastewater, when added as a flocculant, compared with the conventional flocculant addition amount in the prior art, the input can be reduced and the consumption can be reduced;

[0056] And after playing the role of flocculation and sedimentation in the wastewater, the main components of the obtained solid precipitate are zirconium hydroxide and magnesium salt precipitate. Compared with the prior art, no new third substance is introduced into the precipitated impurities due to the addition of a new flocculant, and it is difficult for zirconium hydroxide and magnesium salt precipitate to react with each other, and they are only physically adsorbed and combined; physical separation methods such as isopycnic centrifugation method or extraction separation method can be used for separation to separate zirconium hydroxide and magnesium salt precipitate. The magnesium salt precipitate includes magnesium ammonium phosphate, which can be used as an industrial raw material such as chemical fertilizer. The zirconium hydroxide particles, as an intermediate, are directly put into the zirconia production line as a raw material for preparing zirconia. The subsequent calcination process can remove a small amount of impurity salts adhered to the zirconium hydroxide; it can also be used as a flocculant and put into the precipitation reaction again; thus, by expanding the use of the zirconium hydroxide intermediate, the zirconia production factory does not need to purchase additional flocculants for wastewater treatment, saving the purification treatment cost and improving the resource recycling efficiency.

[0057] Example Four:

[0058] Based on the above Embodiment 3, the crystallization slurry obtained inside the crystallization zone 13 is concentrated, filtered, and dehydrated to obtain a crystalline solid; the crystalline solid mainly includes ammonium bicarbonate and zirconium hydroxide particles that play a role in flocculation and crystallization nuclei; taking advantage of the different solubilities of ammonium bicarbonate and zirconium hydroxide in hot water, the crystallization product obtained in the above S5 step is treated by an extraction separation method to separate zirconium hydroxide and ammonium bicarbonate. Ammonium bicarbonate can be used as a raw material for chemical products such as chemical fertilizers; while the zirconium hydroxide particles can be used as a raw material for zirconia production or participate in wastewater purification treatment as a flocculant again.

[0059] And when using the pump equipment inside the transfer pipe 111, at the water inlet end of the transfer pipe 111, a filter with a mesh number of 40 - 60 meshes is set to reduce the entry of sediment impurities, allowing the free zirconium hydroxide particles in the wastewater to smoothly flow through the transfer pipe 111 into the crystallization zone 13 and participate in the crystallization process, thereby improving the crystallization and ammonia removal efficiency.

[0060] Because when the wastewater enters the sedimentation zone 12, there is free ammonia water. The property of ammonia water is unstable. During the material stirring action and the formation process of the magnesium salt precipitation reaction, part of the ammonia water may decompose and separate from the wastewater, forming ammonia gas that diverges to the upper side area of the liquid surface; in order to reduce the environmental pollution caused by ammonia gas and recycle the ammonia water pollutants; the top of the sedimentation zone 12 is kept closed.

[0061] During the sedimentation process, when carrying out the purification treatment of free ammonia water entering the crystallization zone 13, in the upper side area of the liquid surface of the sedimentation zone 12, it is communicated with the inside of the crystallization zone 13 through the air extraction device 134, and the air containing ammonia gas in the upper side area of the liquid surface of the sedimentation zone 12 is pumped into the inside of the crystallization zone 13; the air extraction device 134 here can select existing air pump equipment.

[0062] A misting chamber 132 is provided at the top of the crystallization zone 13, and misting nozzles 133 are evenly arranged at the bottom of the misting chamber 132; the misting chamber 132 is communicated with the bottom of the crystallization zone 13 through a pipeline, and the pipeline is connected with pump equipment, so that the water source for the misting nozzles 133 to release water mist downward comes from the wastewater in the bottom area of the crystallization zone 13.

[0063] The wastewater at the bottom of the crystallization zone 13 is introduced into the misting chamber 132 through pump equipment, and then the misting nozzles 133 are started to make the wastewater form water mist, filling the upper side area of the crystallization zone 13, and cooperating with the high-temperature CO 2 steam flowing upward from the top, so that the ammonia gas in the upper side area of the liquid surface of the crystallization zone 13 contacts the CO 2 steam and water mist, promoting the reaction of ammonia gas to form ammonium bicarbonate for recovery, so that the free ammonia water in the wastewater is fully utilized.

[0064] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A water pollution detection and treatment device, comprising a reaction tank and a detection device, characterized in that: A partition is provided in the middle of the reaction tank, and the partition divides the interior of the reaction tank into a precipitation zone and a crystallization zone. A first stirrer is provided in the precipitation zone, and a second stirrer is provided in the crystallization zone. The upper area of ​​the partition is provided with a transfer pipe, and the transfer pipe connects the precipitation area and the crystallization area on both sides; an aerator is provided at the bottom of the crystallization area, and a cooling system is provided on the side wall of the crystallization area; A limiting flow ring is arranged inside the sedimentation zone around the stirring blades of the first stirrer, and the limiting flow ring is connected to the top of the sedimentation zone through a connecting rod.

2. A water pollution detection and treatment device according to claim 1, characterized in that: A restriction zone is provided at the bottom of the sedimentation zone, and an interception layer is provided at the top of the restriction zone. The interception layer includes a fixed plate and a movable plate. The fixed plate and the movable plate are staggered with each other. The fixed plate is fixedly connected to the side wall of the restriction zone, and the top of the fixed plate is arc-shaped. The movable plate is connected to the output end of the rotating device in the inner wall of the restriction zone.

3. A water pollution detection and treatment device according to claim 1, characterized in that: A reflux chamber is arranged at a position inside the partition corresponding to the restriction zone, the reflux chamber is communicated with the interior of the restriction zone through a connecting hole, an interception net is arranged inside the connecting hole; the reflux chamber is communicated with the annular chamber arranged inside the flow limiting ring through a reflux pipe, mixing holes are evenly arranged on the inner wall of the flow limiting ring, and the mixing holes are communicated with the interior of the annular chamber.

4. The water pollution detection and treatment equipment according to claim 1 is characterized in that: An atomizing chamber is arranged at the top of the crystallization zone, and atomizing nozzles are evenly arranged at the bottom of the atomizing chamber. The water source for the atomizing nozzles to release water mist downward comes from the wastewater in the bottom area of ​​the crystallization zone; the upper area of ​​the liquid surface in the precipitation zone is connected to the inside of the crystallization zone through an exhaust device.

5. A water pollution detection and treatment method, the treatment method using the water pollution detection and treatment equipment according to any one of claims 1 to 4, characterized in that: The specific steps of the governance method are: S1: Send the wastewater generated in the zirconium oxide production process into the sedimentation area inside the reaction tank, extract wastewater samples and use detection equipment to detect the concentration of ammonia nitrogen pollutants, calculate the amount of magnesium salt and phosphate reagents to be added based on the concentration of ammonia nitrogen pollutants, and add and mix them; S2: Add flocculant to the sedimentation zone and use a stirrer No. 1 to stir the wastewater for 30 to 50 minutes, then turn off the stirrer No. 1 and keep the wastewater in the sedimentation zone still for 6 to 8 hours; S3: The supernatant liquid in the sedimentation area is transferred to the crystallization area through a pumping device, and the remaining sediment mixed liquid in the sedimentation area is filtered to separate the solid sediment and the clear liquid, and the clear liquid of the wastewater is sent to the crystallization area; S4: CO2 steam is sent into the crystallization zone from the aerator arranged at the bottom of the crystallization zone to heat the internal environment of the crystallization zone, and the reaction environment temperature inside the crystallization zone is controlled at 60-80°C in cooperation with the cooling system arranged on the side wall of the crystallization zone; S5: During the reaction process inside the crystallization zone, the internal wastewater is stirred by the No. 2 stirrer installed inside the crystallization zone, and the stirring time is maintained at 5 to 8 hours. After the reaction is completed, the stirring is stopped, and the cooling system is controlled to reduce the internal temperature of the crystallization zone to 0 to 10°C. After standing for 3 to 5 hours, the wastewater inside the crystallization zone is extracted and filtered again to separate the crystals and the clear liquid part, and the Ph value of the clear liquid part is adjusted to the emission standard.

6. A water pollution detection and treatment method according to claim 5, characterized in that: In the above step S2, the magnesium salt is MgCL2, and the phosphate is Na3PO4·6H2O.

7. A water pollution detection and treatment method according to claim 5, characterized in that: The flocculant used in the above step S2 is hydrated zirconium hydroxide.

8. A water pollution detection and treatment method according to claim 5, characterized in that: In the above step S2, the pH value of the wastewater in the sedimentation zone 12 is maintained in the range of 9 to 10 by using an acid-base regulating agent.

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