Water pollution detection and treatment equipment and method

Abstract

The present invention belongs to the technical field of wastewater chemical treatment, and specifically relates to water pollution detection and treatment equipment and methods. The present invention removes ionized and free ammonia nitrogen pollutants contained in wastewater in a sedimentation zone and a crystallization zone, respectively, and reduces the content of solid particle impurities in the wastewater, thereby fully removing the ammonia nitrogen pollutants in the wastewater. In addition, the main components of ultrafine nanometer-scale particles remaining in the wastewater after zirconium oxide production filtration are zirconium hydroxide particles, which can serve as crystallization nuclei for the crystallization reaction of ammonium bicarbonate substances, accelerating the crystallization reaction while reducing the scaling of reaction equipment caused by adhesion to the inner wall of the crystallization zone. At the same time, the ultrafine nanometer-scale zirconium hydroxide particles are crystallized to combine with the ammonium bicarbonate substance, agglomerating and agglomerating to increase the particle size, facilitating subsequent filtration and separation, thereby reducing the content of solid particle impurities in the wastewater and more fully recovering the zirconium hydroxide particles in the wastewater.

Description

Technical Field

[0001] The present invention belongs to the technical field of wastewater chemical treatment, in particular to a device and method for detecting and treating water pollution. Background Art

[0002] Currently, zirconium oxide manufacturers mostly use a chemical co-precipitation method to produce zirconium oxide. Its primary raw materials are zirconium oxychloride and ammonia, and large amounts of water are used for washing and dehydration, resulting in wastewater with high concentrations of ammonia and nitrogen. Furthermore, the zirconium oxychloride particles produced by the chemical co-precipitation method are ultrafine powders. During the filtration and washing process, some zirconium oxychloride particles inevitably remain in the wastewater as impurities. Because the particles are too small, they are difficult to fully remove.

[0003] Existing treatment methods for ammonia nitrogen pollutants in wastewater include air stripping. This method utilizes the volatility of ammonia nitrogen and adjusts the wastewater to alkaline, causing ammonia to dissociate and escape from the wastewater. Air or steam is then used to blow away the ammonia gas, thereby removing the ammonia nitrogen from the wastewater. However, this method has disadvantages such as high air or steam consumption, high power consumption, high costs, poor production workshop operating environment, and high safety risks. In addition, it is difficult to effectively remove the ammonium salt portion in the wastewater in an ionic state.

[0004] Chemical precipitation is a more commonly used method in modern ammonia nitrogen removal technology. It removes ammonia nitrogen pollutants in the wastewater by adding a certain proportion of phosphate and magnesium salt to the wastewater containing ammonia nitrogen, which reacts with the ammonia nitrogen to form ammonium magnesium phosphate precipitate. However, this treatment method releases free ammonia gas to the outside world, which can easily 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 the technical problem is as follows: the present invention provides a water pollution detection and treatment device, including a reaction tank and a detection device, a partition is provided in the middle position of the reaction tank, the partition divides the interior of the reaction tank into a precipitation zone and a crystallization zone, a first agitator is provided in the precipitation zone, and a second agitator is provided in the crystallization zone;

[0007] The upper area of ​​the partition is provided with a transfer pipe, which 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;

[0008] A flow limiting ring is arranged inside the sedimentation zone around the stirring blades of the first stirrer, and the flow limiting ring is connected to the top of the sedimentation zone through a connecting rod.

[0009] Preferably, 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.

[0010] Preferably, a reflux chamber is provided inside the partition at a position 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 provided inside the connecting hole; the reflux chamber is communicated with the annular chamber provided inside the flow limiting ring through a reflux pipe, mixing holes are evenly provided on the inner wall of the flow limiting ring, and the mixing holes are communicated with the interior of the annular chamber.

[0011] Preferably, an atomizing chamber is provided at the top of the crystallization zone, and atomizing nozzles are evenly provided 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 interior of the crystallization zone through an exhaust device.

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

[0013] S1: The wastewater generated during the zirconium oxide production process is sent to the sedimentation area inside the reaction tank. The wastewater sample is extracted and the concentration of ammonia nitrogen pollutants is tested using testing equipment. The amount of magnesium salt and phosphate reagents required to be added is calculated based on the ammonia nitrogen pollutant concentration and then added and mixed;

[0014] 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.

[0015] S3: The supernatant liquid in the sedimentation zone is transferred to the crystallization zone through a pumping device, and the remaining sediment mixture in the sedimentation zone is filtered to separate the solid sediment and the clear liquid, and the clear liquid of the wastewater is sent to the crystallization zone;

[0016] S4: CO2 steam is sent into the crystallization zone from the aerator installed at the bottom of the crystallization zone to heat the internal environment of the crystallization zone. In conjunction with the cooling system installed on the side wall of the crystallization zone, the reaction environment temperature inside the crystallization zone is controlled at 60-80°C.

[0017] 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.

[0018] Preferably, the magnesium salt in the above step S2 is MgCL2, and the phosphate is Na3PO4·6H2O.

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

[0020] Preferably, in the above step S2, the pH value of the wastewater in the precipitation zone is maintained in the range of 9 to 10 by using an acid-base regulating agent.

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

[0022] The water pollution detection and treatment equipment and method described in the present invention remove ionic and free ammonia nitrogen pollutants contained in wastewater in the sedimentation zone and crystallization zone, respectively, and reduce the content of solid particulate impurities in the wastewater, thereby fully removing the ammonia nitrogen pollutants in the wastewater. Furthermore, the ultrafine nano-scale particles remaining in the wastewater after filtration of zirconium oxide production are mainly composed of zirconium hydroxide particles, which can serve as crystallization nuclei for the crystallization reaction of ammonium bicarbonate, accelerating the crystallization reaction while reducing adhesion to the inner wall of the crystallization zone, which causes scaling of the reaction equipment.

[0023] At the same time, for ultrafine nano-scale zirconium hydroxide particles, crystallization allows them to combine with ammonium bicarbonate substances, and they agglomerate and clump together to increase the size of the particles, which is convenient for subsequent 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. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0027] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0028] In the figure: reaction tank 1, partition 11, transfer pipe 111, reflux chamber 112, connecting hole 113, reflux pipe 114, precipitation zone 12, crystallization zone 13, aerator 131, atomizing chamber 132, atomizing nozzle 133, exhaust equipment 134, stirrer No. 14, stirrer No. 2 15, restriction zone 16, fixed plate 161, movable plate 162, flow limiting ring 2, annular chamber 21, mixing hole 211. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings shown in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1:

[0031] As shown in the accompanying drawings Figure 1-Figure 3 As shown, a water pollution detection and treatment device includes a reaction tank 1 and a detection device. A partition 11 is provided in the middle position of the reaction tank 1. The partition 11 divides the interior of the reaction tank 1 into a sedimentation zone 12 and a crystallization zone 13. A first stirrer 14 is provided in the sedimentation zone 12, and a second stirrer 15 is provided in the crystallization zone 13. Here, the first stirrer 14 and the second stirrer 15 are both electric stirrers in the prior art. The motor drives a rotating rod vertically extending into the sedimentation zone 12 or the crystallization zone 13 to rotate, driving the stirring blades evenly arranged on both sides to rotate, thereby achieving stirring and mixing of the internal liquid substance and promoting the normal progress of the reaction.

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

[0033] A limiting flow ring 2 is arranged inside the sedimentation zone 12 around the stirring blades of the No. 1 agitator 14. The limiting flow ring 2 is connected to the top of the sedimentation zone 12 through a connecting rod. The limiting flow ring 2 is suspended and close to the bottom of the sedimentation zone 12. A gap is maintained between the bottom of the limiting flow ring 2 and the inside of the sedimentation zone 12.

[0034] The detection equipment includes ammonia nitrogen detectors and other detection instruments, which are used to test the extracted wastewater samples, analyze the pollutant concentrations, and configure corresponding treatment reagents based on the pollutant concentrations. At different stages of the wastewater purification process, wastewater samples are collected for testing multiple times, and purification measures are adjusted accordingly according to changes in pollutant concentrations, thereby improving the purification efficiency of wastewater.

[0035] There are many possible implementation plans for the specific treatment of zirconium oxide chemical wastewater. Here is one possible implementation plan:

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

[0037] S1: Wastewater generated during the zirconium oxide production process is fed into the sedimentation zone 12 inside the reaction tank 1, a wastewater sample is extracted and the concentration of ammonia nitrogen pollutants therein is detected using a detection device, and the amount of magnesium salt and phosphate reagents to be added is calculated based on the ammonia nitrogen pollutant concentration and then added and mixed;

[0038] S2: Add flocculant to the sedimentation zone 12 and use the first agitator 14 to stir the wastewater for 30 to 50 minutes, then turn off the first agitator 14 and keep the wastewater in the sedimentation zone 12 still for 6 to 8 hours;

[0039] S3: The supernatant liquid in the sedimentation zone 12 is transferred to the crystallization zone 13 through a pumping device, and the remaining sediment mixed liquid in the sedimentation zone 12 is filtered to separate the solid sediment and the clear liquid, and the clear liquid is sent to the crystallization zone 13;

[0040] S4: CO2 steam is introduced into the crystallization zone 13 from the aerator 131 provided at the bottom of the crystallization zone 13 to heat the internal environment of the crystallization zone 13. The reaction environment temperature in the crystallization zone 13 is controlled at 60-80°C in conjunction with the cooling system provided on the side wall of the crystallization zone 13.

[0041] S5: During the reaction process inside the crystallization zone 13, the internal wastewater is stirred by the No. 2 stirrer 15 provided inside the crystallization zone 13, 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 13 to 0 to 10°C, and the mixture is allowed to stand for 3 to 5 hours. The wastewater inside the crystallization zone 13 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.

[0042] In the above-mentioned treatment method, the present application chooses to send the wastewater into the sedimentation zone 12, add magnesium salt and phosphate agents, and adjust the wastewater inside the sedimentation zone 12 with acid-base adjustment reagents, including sodium hydroxide adjustment agents, so that the pH value of the wastewater is always maintained in the range of 9 to 10 during the reaction process.

[0043] At this time, a series of reactions occur in the wastewater, which cause the ammonia nitrogen pollutants in the wastewater to form magnesium salt precipitation, such as: The amount of magnesium salt and phosphate added depends on the Content, to ensure that the content of various components in wastewater is controlled within: In combination with the flocculant, this can accelerate the precipitation and centralized settling of magnesium salts, thereby removing ionic ammonia nitrogen pollutants in the wastewater; the zirconium hydroxide particles contained in the wastewater also have the function of adsorbing impurities, prompting the fixed impurities to flocculate and precipitate. Therefore, in combination with the flocculant, while accelerating the centralized precipitation of internal magnesium salts, it also reduces the original solid particle content in the wastewater;

[0044] After the wastewater is allowed to stand and stratify, the clear liquid portion and the sediment portion inside the sedimentation zone 12 are separated by the transfer pipe 111, so that the wastewater in the clear liquid portion enters the crystallization zone 13. At this time, the ammonia nitrogen pollutant in the wastewater entering the crystallization zone 13 mainly exists in the form of free ammonia water. Therefore, heated high-temperature CO2 steam is introduced through the aerator 131, and the stirring effect is combined to promote the reaction of free ammonia with the inflowing CO2 steam. The heating device installed on the side wall of the crystallization zone 13 ensures the internal reaction environment. The main reaction is: NH3·H2O+CO2=NH4HCO3. In this way, the free ammonia nitrogen pollutant still present therein is converted into ammonium bicarbonate. After the reaction is sufficient, the second agitator 15 and the cooling system are started to vigorously stir the wastewater inside the crystallization zone 13 to promote the reaction. At the same time, the ammonium bicarbonate is converted into a crystalline state by cooling and crystallizing.

[0045] During this process, since the main component of the ultrafine nano-scale particles remaining in the filtration of zirconium oxide production in the wastewater is zirconium hydroxide particles, they can serve as crystallization nuclei for the crystallization reaction of the ammonium bicarbonate substance, accelerating the crystallization reaction while reducing the scaling of the reaction equipment caused by adhesion to the inner wall of the crystallization zone 13; at the same time, for the ultrafine nano-scale zirconium hydroxide particles, crystallization causes them to combine with the ammonium bicarbonate substance, agglomerating and agglomerating with each other to increase the particle size, facilitating subsequent filtration and separation, thereby reducing the content of solid particle impurities in the wastewater and more fully recovering the zirconium hydroxide particles in the wastewater.

[0046] In the sedimentation zone 12 and the crystallization zone 13, the wastewater is respectively freed of ionic and free ammonia nitrogen pollutants, and the content of solid particulate impurities in the wastewater is reduced, so that the ammonia nitrogen pollutants in the wastewater are fully removed. In the subsequent treatment such as adjusting the Ph value, the concentration of ammonia nitrogen pollutants in the treated wastewater is tested by detection equipment. If it meets the discharge standards, it can be discharged normally or recycled.

[0047] Furthermore, in order to promote the reaction between ammonia nitrogen pollutants in the wastewater and the added treatment reagents, mainly magnesium salts and phosphate agents, a flow limiting ring 2 is set at the bottom of the sedimentation area 12, and the flow limiting ring 2 surrounds the stirring blades of the middle No. 1 agitator 14; when adding wastewater, it is ensured that the wastewater can submerge the flow limiting ring 2. In this way, when the No. 1 agitator 14 is started after the treatment reagent is added, because the stirring blades are set at an angle, the rotation of the stirring blades pushes the wastewater inside the flow limiting ring 2 to accelerate downward flow. After being blocked from contact with the bottom of the sedimentation area 12, it flows to both sides and then passes through the inner wall of the sedimentation area 12. The wastewater flows upward in the gap area between the flow-limiting ring 2, and after flowing to the upper area of ​​the flow-limiting ring 2, it flows into the interior of the flow-limiting ring 2 due to the pressure difference, thus realizing continuous circulation flow. Such flow promotes the flow and exchange of wastewater between different vertical areas in the vertical direction; in the horizontal direction, the wastewater at the bottom of the sedimentation area 12 flows from the middle to the two sides, and the wastewater at the top of the sedimentation area 12 flows from the two sides to the middle, which promotes the full flow and mixing of wastewater and treatment reagents between different areas inside the sedimentation area 12, so that ammonia nitrogen pollutants in the wastewater are fully in contact with the treatment reagents to form precipitation and be separated;

[0048] Furthermore, because the density of zirconium oxide particles is relatively large, they tend to settle to the bottom of the sedimentation zone 12. The guiding effect of the flow-limiting ring 2 causes the wastewater to impact downward and flow back upward, driving the zirconium oxide particles in the bottom area upward. The zirconium oxide particles can serve as condensation nuclei. Coupled with the adsorption effect of the zirconium oxide particles, pollutants such as magnesium salts can be precipitated and combined with them during the flow process. After the stirring is completed, larger pieces of precipitation are formed, prompting the pollutants to precipitate and settle quickly, allowing them to be fully separated. This improves the purification efficiency of the zirconium oxide particles while also allowing them to be fully utilized.

[0049] Example 2:

[0050] On the basis of the above-mentioned embodiment 1, a restriction zone 16 is provided at the bottom of the precipitation zone 12, and an interception layer is provided at the top of the restriction zone 16. The interception layer includes a fixed plate 161 and a movable plate 162. The fixed plate 161 and the movable plate 162 are arranged in an interlaced manner. The fixed plate 161 is fixedly connected to the side wall of the restriction zone 16, and the top of the fixed plate 161 is arc-shaped. The movable plate 162 is connected to the output end of the rotating device in the inner wall of the restriction zone 16. The rotating device here can be a motor device controlled by an external controller.

[0051] At the initial stage of purification, when wastewater flows in, the interception layer of the restriction zone 16 remains open, and the movable plate 162 therein remains in a vertical state, so that the wastewater can flow freely on the upper and lower sides of the interception layer and fully exchange; after adding the treatment reagent and starting the No. 1 agitator 14 to fully combine the treatment reagent with the ammonia nitrogen pollutants in the wastewater, the No. 1 agitator 14 is closed, so that the magnesium salt pollutant precipitates formed in the wastewater gather together and accelerate downward sedimentation. After the pollutant precipitates pass through the interception layer, they enter the restriction zone 16 and continue to accumulate in the restriction zone 16; after waiting for a period of time, the wastewater sample is tested. When it is detected that the ammonia nitrogen pollutant concentration in the wastewater has not dropped to a predetermined range, the treatment reagent can be continued to be added. At this time, the rotating device is started to drive the movable plate 162 to rotate to a horizontal state. At this time, the interception layer remains closed, and then the No. 1 agitator 14 is started. The stirring effect of the wastewater promotes the mixing of chemical reagents and the precipitation of pollutants, and the stirring effect is blocked outside the restriction zone 16 to prevent the stirring effect from affecting the pollutant precipitation already precipitated inside the restriction zone 16 and causing it to dissolve into the wastewater again;

[0052] Furthermore, a reflux chamber 112 is provided at a portion of the interior of the partition 11 corresponding to the restricted area 16, the reflux chamber 112 is communicated with the interior of the restricted area 16 through a connecting hole 113, an interception net is provided inside the connecting hole 113; the reflux chamber 112 is communicated with the annular chamber 21 provided inside the flow limiting ring 2 through a reflux pipe 114, mixing holes 211 are evenly provided on the inner wall of the flow limiting ring 2, the mixing holes 211 are communicated with the interior of the annular chamber 21; the pump device inside the reflux pipe 114 is started, so that the liquid part inside the restricted area 16 flows into the liquid through the interception net. The wastewater flows into the reflux pipe 114 and then into the annular cavity 21 inside the flow-limiting ring 2. At the same time, the wastewater on the upper side of the intercepting layer seeps downward from the gap between the movable plate 162 and the fixed plate 161, replenishing the part flowing out of the restricted area 16 and maintaining the water pressure balance. The zirconium oxide particles and ammonia nitrogen pollutants accumulated in this part of the liquid are mixed into the agitated wastewater again through the mixing holes 211 evenly arranged on the inner wall of the flow-limiting ring 2. The zirconium oxide particles can promote the precipitation, aggregation and sedimentation of the pollutants therein, and the ammonia nitrogen pollutants combine and react fully with the treatment reagents, thereby fully purifying the wastewater inside the sedimentation area 12.

[0053] After repeating the above-mentioned operation of adding treatment reagents many times, the interception layer is opened, and after settling for a period of time, the interception layer is closed again, and the clear liquid part on the upper side of the interception layer is extracted through the transfer pipe 111 to participate in the treatment of the crystallization area 13; for the precipitated impurities in the restriction area 16, after filtering and separating the solid precipitate in the subsequent treatment, the separated liquid part will participate in the next zirconium oxide wastewater purification treatment process.

[0054] Example 3:

[0055] Based on the above-mentioned embodiment 1, in the present application, in step S2 of the precipitation treatment inside the precipitation zone 12, the added chemical magnesium salt can be MgCL2, the phosphate can be Na3PO4·6H2O, and the flocculant for accelerating precipitation can be directly hydrated zirconium hydroxide. As an intermediate in the production of zirconium oxide, hydrated zirconium hydroxide is readily available in production plants, and the input amount is 20 to 30 mg / L depending on the wastewater content. Because hydrated zirconium hydroxide is the same as the main solid particulate impurities in the wastewater, when added as a flocculant, the input and consumption can be reduced compared to the conventional flocculant addition amount in the prior art.

[0056] After being put into wastewater to exert flocculation and sedimentation effects, the main components of the obtained solid precipitate are zirconium hydroxide and magnesium salt precipitate. Compared with the existing technology, no new third substance is introduced into the precipitated impurities due to the addition of a new flocculant, and it is difficult for the zirconium hydroxide and the magnesium salt precipitate to react, and only physical adsorption and binding occur. The zirconium hydroxide and the magnesium salt precipitate can be separated by physical separation methods such as isopycnic centrifugation or extraction separation. The magnesium salt precipitate includes magnesium ammonium phosphate, which can be used for the production of industrial raw materials such as fertilizers. The zirconium hydroxide particles are directly put into the zirconium oxide production line as an intermediate and used as a raw material for preparing zirconium oxide. The subsequent calcination process can remove a small amount of impurity salts adhering to the zirconium hydroxide. The zirconium hydroxide can also be put into the precipitation reaction again as a flocculant. In this way, the use of the zirconium hydroxide intermediate is expanded, and the zirconium oxide production plant does not need to purchase additional flocculants for wastewater treatment, saving purification treatment costs and improving resource recycling efficiency.

[0057] Example 4:

[0058] On the basis of the above-mentioned embodiment 3, the crystal slurry obtained in 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 act as flocculation and crystallization nuclei; taking advantage of the different solubilities of ammonium bicarbonate and zirconium hydroxide in hot water, the crystals obtained in the above-mentioned step S5 are treated by an extraction separation method to separate zirconium hydroxide and ammonium bicarbonate. The ammonium bicarbonate can be used as a raw material for chemical products such as fertilizers; and the zirconium hydroxide particles can be used as a raw material for zirconium oxide production, or can be used again as a flocculant in wastewater purification.

[0059] When the pump equipment inside the transfer pipe 111 is used, a filter with a mesh size of 40 to 60 is set at the water inlet end of the transfer pipe 111 to reduce the entry of precipitated impurities, allowing free zirconium hydroxide particles in the wastewater to smoothly pass through the transfer pipe 111 and flow into the crystallization area 13 to participate in the crystallization process, thereby improving the crystallization deamination efficiency.

[0060] Because free ammonia exists in the wastewater when it enters the sedimentation zone 12, and the ammonia is unstable, during the material stirring and magnesium salt precipitation reaction, part of the ammonia may decompose and leave the wastewater, forming ammonia gas that emanates to the area above the liquid surface. In order to reduce the pollution of ammonia gas to the environment and to repeatedly recycle the ammonia pollutants, the top of the sedimentation zone 12 is kept closed.

[0061] During the precipitation process, when the free ammonia water entering the crystallization zone 13 is purified, the area above the liquid surface of the precipitation zone 12 is connected to the interior of the crystallization zone 13 through the exhaust device 134, and the air containing ammonia in the area above the liquid surface of the precipitation zone 12 is sucked into the interior of the crystallization zone 13; the exhaust device 134 here can be an existing air pump device;

[0062] An atomizing chamber 132 is provided at the top of the crystallization area 13, and atomizing nozzles 133 are evenly provided at the bottom of the atomizing chamber 132; the atomizing chamber 132 is connected to the bottom of the crystallization area 13 through a pipeline, and the pipeline is connected to a pump device, so that the water source for the atomizing nozzle 133 to release water mist downward comes from the wastewater in the bottom area of ​​the crystallization area 13.

[0063] The wastewater at the bottom of the crystallization area 13 is introduced into the atomization chamber 132 through a pump device, and then the atomization nozzle 133 is started to form water mist into the wastewater, filling the upper area of ​​the crystallization area 13, and combined with the high-temperature CO2 steam flowing upward from the top, the ammonia gas in the upper area of ​​the liquid surface of the crystallization area 13 is brought into contact with the CO2 steam and water mist, promoting the reaction of ammonia gas to form ammonium bicarbonate and thus being recovered, so that the free ammonia water in the wastewater is fully utilized.

[0064] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in 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 stirrer No. 1 is provided in the precipitation zone, and a stirrer No. 2 is provided in the crystallization zone; The upper area of ​​the partition is provided with a transfer pipe, which 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 flow limiting ring is provided inside the sedimentation zone around the stirring blades of the first stirrer, and the flow limiting ring is connected to the top of the sedimentation zone through a connecting rod; 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.

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

3. The water pollution detection and treatment equipment according to claim 1, characterized in that: An atomizing chamber is provided at the top of the crystallization zone, and atomizing nozzles are evenly provided 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 interior of the crystallization zone through an exhaust device.

4. A water pollution detection and treatment method, the method using the water pollution detection and treatment device according to any one of claims 1 to 3, characterized in that: The specific steps of the treatment method are: S1: The wastewater generated during the zirconium oxide production process is sent to the sedimentation area inside the reaction tank. The wastewater sample is extracted and the concentration of ammonia nitrogen pollutants is tested using testing equipment. The amount of magnesium salt and phosphate reagents required to be added is calculated based on the ammonia nitrogen pollutant concentration and then added and mixed; 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 zone is transferred to the crystallization zone through a pumping device, and the remaining sediment mixture in the sedimentation zone is filtered to separate the solid sediment and the clear liquid, and the clear liquid of the wastewater is sent to the crystallization zone; S4: CO2 steam is sent into the crystallization zone from the aerator installed at the bottom of the crystallization zone to heat the internal environment of the crystallization zone. In conjunction with the cooling system installed on the side wall of the crystallization zone, the reaction environment temperature inside the crystallization zone is controlled at 60-80°C. 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. The temperature is allowed to stand for 3 to 5 hours, and 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 discharge standard.

5. A water pollution detection and treatment method according to claim 4, characterized in that: In the above step S2, the magnesium salt is MgCl2, and the phosphate is Na3PO4·6H2O.

6. A water pollution detection and treatment method according to claim 4, characterized in that: The flocculant used in the above step S2 is hydrated zirconium hydroxide.

7. A water pollution detection and treatment method according to claim 4, characterized in that: In the above step S2, the pH value of the wastewater in the sedimentation zone is maintained in the range of 9 to 10 by using an acid-base regulating agent.

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