A device for treating monomethylamine plant growth regulator production wastewater

Abstract

This invention discloses a treatment device for wastewater from the production of cyanamide plant growth regulators, including an oxidation tank and a flocculation tank. A detection box is installed on one side of the bottom of the oxidation tank. This invention targets the oxidation and precipitation treatment process of cyanamide wastewater, dividing the wastewater into oxidation and flocculation tanks. The main oxidation and precipitation treatment is carried out in the oxidation tank. A rotary jet agitator is installed at the upper end of the oxidation tank, using the wastewater flowing into the oxidation tank as a circulation carrier to uniformly spray the synchronously supplied oxidant into the oxidation tank through the jet agitator. This is beneficial to improve the reaction effect between the oxidant and the wastewater. By combining wastewater information with a preset dosage ratio model, the theoretical dosage of the agent is obtained. The oxidant is added in a "precise", "dynamic", and "intelligent" manner by combining addition and ORP monitoring feedback, avoiding the problems of excessive oxidant or incomplete treatment that may occur with traditional fixed addition methods.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically, to a treatment device for wastewater from the production of cyanamide plant growth regulators. Background Technology

[0002] Cyanamide plant growth regulators are used to break seed dormancy, promote germination, and make flower buds more uniform and significantly increase glucose content. However, the production of cyanamide plant growth regulators generates wastewater containing cyanide, ammonia nitrogen, heavy metals, and suspended solids. Common wastewater treatment processes include pretreatment, biochemical treatment, and advanced treatment.

[0003] Considering the toxicity of cyanide, direct entry into biochemical treatment may inhibit microorganisms. Therefore, the pretreatment stage must effectively remove or degrade cyanide. Thus, in the treatment of cyanamide wastewater, the oxidation and precipitation process is the core step. This step requires the addition of reagents to achieve cyanide oxidation, heavy metal precipitation, and removal of ammonia nitrogen and suspended solids.

[0004] The common method of reagent dosing is still to add the reagent in a single, pre-set amount. This is especially problematic when adding oxidants. Firstly, this traditional single-dosing method makes it difficult to achieve thorough mixing and flow between the reagent and wastewater. Secondly, it prevents the adjustment of the reagent dosage based on real-time reaction conditions. Insufficient dosage fails to achieve complete cyanide conversion, while excessive dosage leaves residual oxidants such as sodium hypochlorite or hydrogen peroxide in the water, consuming flocculants in subsequent flocculation processes. While it enhances activity and inhibits hydrolysis, it also has certain drawbacks. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that when treating wastewater by adding reagents once, it is difficult to reasonably adjust the dosage of the reagents according to the real-time reaction. The invention provides a treatment device for wastewater from the production of cyanamide plant growth regulator.

[0006] The objective of this invention can be achieved through the following technical solution: a treatment device for wastewater from the production of cyanamide plant growth regulator, comprising an oxidation tank and a flocculation tank, wherein a detection box is provided on one side of the bottom of the oxidation tank, and a sludge discharge structure with one end connected to the detection box is provided at the bottom of the oxidation tank, and a pump connected to the detection box and externally connected to a wastewater inlet pipe is provided at the detection box, and a rotary joint fixed to the upper side wall of the oxidation tank is connected to the outlet end of the pump.

[0007] The oxidation tank is equipped with a jet agitator connected to a rotary joint. The rotary joint is also connected to an oxidant storage tank. An outlet is provided on the end wall of the oxidation tank near the flocculation tank. A drainage component that acts on the flocculation tank is installed at the outlet.

[0008] The testing box is equipped with an ORP detector and a control panel. The control panel contains an information acquisition module, a first-stage dosing module, a measurement feedback module, and a second-stage dosing module.

[0009] The information acquisition module is used to acquire wastewater information flowing into the oxidation tank and send it to the first-stage dosing module. The first-stage dosing module obtains the oxidation dosage based on the wastewater information, generates a main dosing signal, and releases the wastewater at a certain percentage of the oxidation dosage. The measurement feedback module is used to acquire the treatment information of the wastewater after the main dosing, obtain the single dosing coefficient, generate a feedback dosing signal, and use a certain percentage of the oxidation dosage as the initial oxidation dosage for the second stage. Combined with the single dosing coefficient, the single dosing dosage is calculated and released sequentially. The second-stage dosing module acquires the residual pollution information of the wastewater after the first-stage treatment, obtains the flocculation dosage, and generates a flocculation dosing signal.

[0010] Furthermore, the sludge discharge structure includes multiple sludge discharge inclined pipes inclined at the bottom of the oxidation tank, with the inclined ends of the sludge discharge inclined pipes extending downwards to the detection box. Each sludge discharge inclined pipe is rotatably equipped with a spiral sludge conveying blade, and a drive mechanism for the linkage rotation of the multiple spiral sludge conveying blades is installed outside the oxidation tank.

[0011] Furthermore, the jet agitation assembly includes a rotating cylinder rotatably installed between the inner walls of the oxidation tank. Multiple sets of jet tubes are distributed horizontally on the outer end wall of the rotating cylinder. Each set of jet tubes has multiple rings, and all jet tubes are connected to the inside of the rotating cylinder. A cap is installed at the top of the oxidation tank that is movable and adaptable to the outer edge of the multiple jet tubes. This facilitates the oxidation treatment of cyanamide wastewater in a closed space and improves the safety of the treatment.

[0012] Furthermore, a sealing assembly is also installed inside the testing box, which is abutted against the bottom of the sludge discharge structure. The sealing assembly includes a pair of electric push rods fixedly installed on the testing box. The telescopic ends of the pair of electric push rods extend into the testing box and are fixed with a sealing plate that fits against the inclined bottom of the sludge discharge pipe. The bottom of the testing box has a sludge discharge port for the sealing plate to pass through vertically. The bottom surface of the testing box has an inclined surface that is inclined downward toward the sludge discharge port, and the upper surface of the sealing plate has a sludge discharge surface that is parallel to the inclined surface.

[0013] Furthermore, the drainage assembly includes a movable, sealed, lifting and lowering opening plate installed at the outlet. A drainage plate inclined downward toward the flocculation tank is installed at the top of the opening and closing plate. A flow channel with upper and lower openings is reserved inside the drainage plate. An outer baffle is fixed to the outer side of the top of the drainage plate and is attached to the outer wall of the oxidation tank. A drainage pipe with a solenoid valve at one end is fixedly connected to the bottom of the drainage plate, and a sampling pipe is connected to the other end of the drainage pipe.

[0014] Furthermore, the process of obtaining the oxidation dosage includes:

[0015] The information acquisition module collects the cyanide content, heavy metal ion content, ammonia nitrogen content, and total wastewater volume of the wastewater flowing into the oxidation tank. The cyanide content, heavy metal ion content, and ammonia nitrogen content are labeled CNi, ZJi, and ANi, respectively. The pollution treatment amount WCi is obtained by using the formula WCi=CNi×α+ZJi×β+ANi×γ, where α, β, and γ are the preset weighting factors of CNi, ZJi, and ANi, respectively, with α>β>γ>1.

[0016] The ratio of pollution treatment volume to total wastewater volume is substituted into a preset dosing ratio model for calculation to obtain the oxidation dosage.

[0017] Furthermore, the process of obtaining the single-dose replenishment coefficient includes:

[0018] The information acquisition module collects the ORP value of the sewage entering the detection tank in real time through the ORP detector. The ratio of the measured real-time ORP value to the set ORP value is substituted into the preset dosing ratio model for calculation to obtain the single dosing coefficient.

[0019] Furthermore, after generating the feedback replenishment signal, a first replenishment is performed using 10% of the initial second-order oxidation dosage as the initial second-order oxidation dosage. The product of the initial second-order oxidation dosage and the initially obtained single replenishment coefficient is used as the single replenishment amount to release the oxidant, and a second replenishment is performed. The ratio of the newly measured real-time ORP value to the set ORP value is substituted into the preset replenishment ratio model for calculation to obtain a new single replenishment coefficient. The difference between the initial second-order oxidation dosage and the single replenishment amount is used as the second-order continuous oxidation dosage, and the product of the second-order continuous oxidation dosage and the newly obtained single replenishment coefficient is used as the new single replenishment amount to release the oxidant. This process is repeated until the measured real-time ORP value reaches the preset ORP value range.

[0020] Furthermore, the process of obtaining the flocculant dosage includes:

[0021] Wastewater discharged from the oxidation tank into the flocculation tank is sampled multiple times using a sampling tube. The turbidity of each sample is obtained using a turbidity meter. The average turbidity is calculated, and the total amount of remaining wastewater discharged into the flocculation tank is obtained. The ratio of the average turbidity to the total amount of remaining wastewater is substituted into a preset flocculation dosage model to calculate the flocculation dosage. The dosage can then be selected for single or multiple applications.

[0022] Compared with the prior art, the advantages of this invention are:

[0023] This solution addresses the oxidation and precipitation treatment of cyanamide wastewater. It involves dividing the wastewater into oxidation and flocculation tanks. The primary oxidation and precipitation treatment takes place in the oxidation tank. A rotary jet agitator is installed at the upper end of the oxidation tank, using the wastewater flowing into the tank as a circulation medium. This agitator evenly sprays the synchronously supplied oxidant into the oxidation tank, improving the reaction between the oxidant and the wastewater. By combining wastewater information with a pre-set dosage ratio model, the theoretical dosage of the reagent is obtained. The solution combines dosing and ORP monitoring feedback for precise, dynamic, and intelligent oxidant delivery, avoiding the problems of excessive oxidant or incomplete treatment that can occur with traditional fixed dosing methods.

[0024] During the oxidant dosing process, wastewater information is collected to obtain the pollution treatment volume. The ratio of the pollution treatment volume to the total wastewater volume is substituted into a preset dosing ratio model to calculate the oxidation dosage. Similarly, during the subsequent flocculation and sedimentation treatment in the flocculation tank, the drainage component is opened downwards to allow the supernatant wastewater in the oxidation tank to slowly flow into the flocculation tank. During the supernatant wastewater flow, the post-oxidation wastewater information is collected multiple times. The ratio of the average turbidity to the total remaining wastewater volume is substituted into a preset flocculation dosage ratio model to calculate the flocculation dosage. This allows for automatic determination of the dosage of agents at different treatment stages based on the needs of wastewater treatment, which helps to improve the precise control of agents. Attached Figure Description

[0025] Figure 1 This is a front view of the present invention.

[0026] Figure 2 This is a schematic diagram of the rear structure of the present invention;

[0027] Figure 3 This is a front sectional view of the present invention;

[0028] Figure 4 This is a schematic diagram of the sludge removal structure of the present invention;

[0029] Figure 5 This is a partial cross-sectional view of the jet agitation assembly of the present invention;

[0030] Figure 6 This is a schematic diagram of the drainage component of the present invention;

[0031] Figure 7 This is a cross-sectional view of the drainage component of the present invention;

[0032] Figure 8 This is a schematic diagram of the settling process of wastewater after oxidation in the oxidation tank according to the present invention.

[0033] Figure 9This is a schematic diagram of the structure of the present invention, which pushes the drainage component downward to discharge the supernatant wastewater into the flocculation tank;

[0034] Figure 10 This is a schematic diagram of the structure of the present invention for sludge removal from the oxidation tank;

[0035] Figure 11 This is a schematic diagram of the structure inside the flocculation tank of the present invention;

[0036] Figure 12 This is a system principle block diagram of the present invention.

[0037] Explanation of the labels in the diagram:

[0038] 1. Oxidation tank; 101. Outlet; 2. Flocculation tank; 3. Detection box; 4. Wastewater inlet pipe; 5. Pump; 6. Drainage assembly; 61. Opening and closing plate; 62. Drainage plate; 63. Drainage pipe; 64. Outer baffle; 65. Sampling pipe; 7. Rotary drum; 8. Jet pipe; 9. Oxidant storage tank; 10. Sludge discharge inclined pipe; 11. Spiral sludge conveying blade; 12. Sealing plate; 13. Electric push rod one; 14. ORP detector; 15. Return pipe; 16. Electric push rod two; 17. Stirring blade; 18. Sludge pusher plate. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] Example 1: This invention discloses a treatment device for wastewater from the production of cyanamide plant growth regulators. Please refer to [link / reference]. Figures 1-3 It includes an oxidation tank 1 and a flocculation tank 2 distributed in front and behind. The bottom of the oxidation tank 1 is provided with a sludge discharge structure that extends to the outside of it.

[0041] An inspection box 3 with a sludge discharge structure is fixed at the outer end of the oxidation tank 1. A pump 5 connected to the inspection box 3 is provided at the inspection box 3. A return pipe 15 is provided at the bottom of the inspection box 3 and connected to the water inlet of the pump 5. The water inlet of the pump 5 is also connected to a wastewater inlet pipe 4. The water outlet of the pump 5 is connected to a rotary joint fixed to the upper side wall of the oxidation tank 1 through a pipe.

[0042] The upper end of the oxidation tank 1 is equipped with a jet agitator connected to a rotary joint. An oxidant storage tank 9 connected to the rotary joint is provided on one side of the upper end of the oxidation tank 1. The oxidant storage tank 9 is connected to the rotary joint through a reagent inlet pipe to achieve the joint supply of wastewater and reagent.

[0043] Please seeFigure 3 , Figure 4 The sludge discharge structure includes multiple sludge discharge inclined pipes 10 inclinedly arranged at the bottom of the oxidation tank 1. The inclined ends of the sludge discharge inclined pipes 10 extend downward to the detection box 3. Each sludge discharge inclined pipe 10 is rotatably installed with a spiral sludge conveying blade 11. A drive mechanism for the linkage rotation of the multiple spiral sludge conveying blades 11 is installed outside the oxidation tank 1.

[0044] Please see Figure 3 and Figure 5 The jet agitation assembly includes a rotating cylinder 7 rotatably installed between the inner walls of the oxidation tank 1. Multiple sets of jet pipes 8 are distributed horizontally on the outer end wall of the rotating cylinder 7. Each set of jet pipes 8 is arranged in a ring with multiple jet pipes. All multiple jet pipes 8 are connected to the inside of the rotating cylinder 7. Channels for fluid flow are opened on the jet pipes 8.

[0045] The oxidation tank 1 is fixed with a drive motor that drives the rotating drum 7 to rotate. The end of the rotating drum 7 away from the drive motor is connected to a rotary joint, so that the rotating drum 7 can be rotated without affecting the flow of liquid. The top of the oxidation tank 1 is equipped with a cap that is movable and adapted to the outer edge of multiple jet pipes 8, which is beneficial for the oxidation treatment of cyanamide wastewater in a closed space and improves the safety of treatment.

[0046] Please see Figure 3 Inside the testing box 3, a sealing assembly is also installed at a height that abuts against the outside of the bottom of the sludge discharge structure. The sealing assembly includes a pair of electric push rods 13 fixedly installed on the testing box 3. The telescopic ends of the pair of electric push rods 13 penetrate into the testing box 3 and are fixed with a sealing plate 12 that fits against the inclined bottom of the sludge discharge pipe 10. The bottom of the testing box 3 has a sludge discharge port for the sealing plate 12 to pass through vertically. The bottom surface of the testing box 3 has an inclined surface that is inclined downward toward the sludge discharge port, and the upper surface of the sealing plate 12 has a sludge discharge surface that is parallel to the inclined surface.

[0047] The main oxidation and precipitation treatment is carried out in oxidation tank 1. The cyanamide wastewater to be treated is introduced into the rotating drum 7 through the cooperation of wastewater inlet pipe 4 and pump 5. At the same time, a small amount of oxidant is continuously introduced. In this process, the rotating drum 7 is driven by an external drive motor. The wastewater is used as a flow carrier to spray the supplied oxidant into the oxidation tank 1 in a rotating jet manner. The mixing effect between wastewater and oxidant is effectively improved by the stirring effect of multiple sets of jet pipes 8.

[0048] During this process, the spiral sludge conveying blades 11 at multiple sludge discharge inclined pipes 10 are activated simultaneously, which helps to improve the stirring effect at the bottom of the oxidation tank 1. After the wastewater is supplied, the sealing components inside the detection box 3 are opened. Relying on the cooperation of the oxidation tank 1, flocculation tank 2, return pipe 15 and jet stirring components, the wastewater is circulated and flows, and the reaction effect is further promoted in a dynamic mixing manner.

[0049] Please see Figures 6-9 An outlet 101 is provided on the end wall of the oxidation tank 1 near the flocculation tank 2. A drainage component 6 is installed at the outlet 101 to open and close it and extend the liquid outlet end into the flocculation tank 2. A pair of electric push rods 13 that act on the drainage component 6 are installed on the top rear side of the oxidation tank 1.

[0050] The drainage assembly 6 includes a movable, sealed, lifting and lowering opening plate 61 installed at the outlet 101. A drainage plate 62 inclined downward toward the flocculation tank 2 is installed at the top of the opening plate 61. The drainage plate 62 has a flow groove with openings at the top and bottom. An outer baffle 64 is fixed to the outer side of the top of the drainage plate 62 and is attached to the outer wall of the oxidation tank 1. A drainage pipe 63 with a solenoid valve at one end is fixedly connected to the bottom of the drainage plate 62, and a sampling pipe 65 is connected to the other end of the drainage pipe 63.

[0051] Please see Figures 8-9 After the oxidation process is completed, the sealing components in the detection box 3 are closed, and the wastewater in the detection box 3 is completely pumped into the oxidation tank 1. The rotation of the rotating drum 7 and the spiral sludge conveying blade 11 is turned off. Then, the static sedimentation process begins, and the sediment settles in the sludge discharge inclined pipe 10 and its upper part. At this time, the outer baffle 64 is driven downward by the electric push rod 13 to gradually open the outlet 101. The supernatant wastewater in the oxidation tank 1 overflows into the flocculation tank 2 through the exposed outlet 101 and the drain plate 62. Without the need for a pump, the supernatant wastewater flows into the flocculation tank 2 relatively smoothly, so as to avoid disturbing the lower sediment in the oxidation tank 1 due to the suction force of the pump.

[0052] After the supernatant wastewater in oxidation tank 1 is discharged into flocculation tank 2, the sealing plate 12 is then pushed downward by the electric push rod 13. Please refer to [link / reference needed]. Figure 10 Continue until the sludge discharge port is exposed, then restart the spiral sludge conveying blades 11. The spiral sludge conveying blades 11 will discharge the sludge at the sludge discharge inclined pipe 10 toward the sludge discharge port. The cyanide-containing sludge needs to be detoxified and then sent to a qualified hazardous waste disposal unit for disposal.

[0053] In addition, please see Figure 11 It should be added that a rotating stirring blade 17 is also installed in the flocculation tank 2. Before flocculation and sedimentation, the stirring blade 17 is used to stir the wastewater and flocculant. A sludge pusher 18 that can be driven horizontally outward is added to one side of the bottom of the flocculation tank 2. A sludge discharge channel that can be opened and closed is provided on the other side of the bottom of the flocculation tank 2. The outer end face of the sludge pusher 18 is provided with an inclined sludge pusher surface. After flocculation and sedimentation, the sludge pusher 18 is driven outward to discharge the sludge in the flocculation tank 2 to the sludge discharge channel at the outer end of the flocculation tank 2.

[0054] Example 2: Based on Example 1, this example adds an ORP detector 14 and a control panel connected to the ORP detector 14 to the detection box 3, so as to accurately calculate and control the addition of the agent through an intelligent control system, as detailed below:

[0055] Please see Figure 12 The control panel contains an information acquisition module, a first-order dosing module, a measurement feedback module, and a second-order dosing module.

[0056] The information acquisition module is used to acquire wastewater information flowing into oxidation tank 1 and send it to the first-stage dosing module. The first-stage dosing module obtains the oxidation dosage based on the wastewater information and generates a main dosing signal. The process of obtaining the oxidation dosage includes:

[0057] The cyanide content, heavy metal ion content, ammonia nitrogen content, and total wastewater volume of the wastewater flowing into oxidation pond 1 are collected by the information acquisition module. The cyanide content, heavy metal ion content, and ammonia nitrogen content are labeled as CNi, ZJi, and ANi, respectively. The pollution treatment amount WCi is obtained by using the formula WCi=CNi×α+ZJi×β+ANi×γ, where α, β, and γ are the preset weighting factors of CNi, ZJi, and ANi, respectively, and α>β>γ>1.

[0058] The ratio of pollution treatment volume to total wastewater volume is substituted into a preset dosing ratio model for calculation. The dosing ratio model is based on an empirical value or a coefficient relationship derived from experimental data. For example, for a certain total amount of wastewater and a certain amount of pollutants, a preset standard dosage is obtained. The oxidation dosage is obtained through the ratio model relationship. This can be obtained through existing technical means. In the main dosing stage, 90% of the oxidation dosage is released, and 10% of the oxidation dosage is reserved for subsequent feedback and supplementation control stage.

[0059] The measurement feedback module is used to obtain the treatment information of the wastewater after the main dosing. The treatment information is the ORP value of the wastewater entering the detection box 3 in real time by the ORP detector 14. The ORP value directly reflects the remaining capacity of the oxidant in the water. The ratio of the measured real-time ORP value to the ORP set value is substituted into the preset dosing ratio model for calculation to obtain the single dosing coefficient and generate a feedback dosing signal. With 10% of the oxidation dosage as the second-order initial oxidation dosage, combined with the single dosing coefficient, the single dosing amount is calculated and released one by one. Through real-time monitoring, the system can accurately determine whether the oxidant is insufficient or excessive, avoiding blind dosing. The traditional fixed dosing method may lead to oxidant waste (excess) or incomplete treatment (insufficient), while ORP feedback can dynamically adjust the dosing amount to achieve "dosing on demand".

[0060] The process of replenishing Tier 1 potions is as follows:

[0061] After generating the feedback replenishment signal, the first replenishment is performed using 10% of the initial second-order oxidation dosage as the initial second-order oxidation dosage. The product of the initial second-order oxidation dosage and the initially obtained single replenishment coefficient is used as the single replenishment amount to release the oxidant. The second replenishment is then performed. The ratio of the newly measured real-time ORP value to the set ORP value is substituted into the preset replenishment ratio model for calculation to obtain a new single replenishment coefficient. The difference between the initial second-order oxidation dosage and the single replenishment amount is used as the second-order continuous oxidation dosage. The product of the second-order continuous oxidation dosage and the newly obtained single replenishment coefficient is used as the new single replenishment amount to release the oxidant. This cycle is repeated until the measured real-time ORP value reaches the preset ORP value range.

[0062] When the concentration, flow rate, or composition of pollutants in wastewater changes, the ORP feedback mechanism can respond quickly. Through closed-loop control of ORP and oxidant addition, it ensures that pollutants such as cyanide and heavy metals in the effluent are completely oxidized to meet emission standards.

[0063] The second-stage dosing module acquires residual pollution information of the wastewater after first-stage treatment through the information acquisition module. It repeatedly extracts wastewater from oxidation tank 1 into flocculation tank 2 through sampling tube 65, obtains the turbidity of each sampling through a turbidity meter, calculates the average turbidity, and obtains the total amount of remaining wastewater discharged into flocculation tank 2. It substitutes the ratio of average turbidity to the total amount of remaining wastewater into the preset flocculation dosing ratio model to calculate the flocculation dosing amount, and generates a flocculation dosing signal to select one or multiple dosings.

[0064] In summary: For the oxidation and precipitation treatment process of cyanamide wastewater, an oxidation tank 1 and a flocculation tank 2 are set up in separate areas. The main oxidation and precipitation treatment is carried out in the oxidation tank 1. A rotary jet agitator is installed at the upper end of the oxidation tank 1. The wastewater flowing into the oxidation tank 1 serves as a flow carrier, which is used to uniformly spray the synchronously supplied oxidant into the oxidation tank 1 through the jet agitator. This is beneficial to improve the reaction effect between the oxidant and the wastewater. The theoretical dosage of the reagent is obtained by combining the wastewater information with a preset dosage ratio model. That is, the pollution treatment amount is obtained by collecting wastewater information. The ratio of the pollution treatment amount to the total amount of wastewater is substituted into the preset dosage ratio model for calculation to obtain the oxidation dosage.

[0065] It combines dosing and ORP monitoring feedback to provide "precise", "dynamic" and "intelligent" oxidant dosing, avoiding the problems of excessive oxidant or incomplete treatment that may occur with traditional fixed dosing methods. After the main dosing (initial large dose oxidation), the oxidation capacity is maintained by ORP feedback replenishment, which is suitable for long-term operation or high-concentration wastewater treatment.

[0066] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto; any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A treatment device for wastewater from the production of cyanamide plant growth regulator, comprising an oxidation tank and a flocculation tank, characterized in that: A detection box is provided on one side of the bottom of the oxidation tank. A sludge discharge structure with one end connected to the detection box is provided at the bottom of the oxidation tank. A pump connected to the detection box and externally connected to a wastewater inlet pipe is provided at the detection box. The oxidation tank is equipped with a jet agitator that is rotatably connected to the outlet of the pump. The outlet of the pump is connected to a chemical inlet pipe. The rear end wall of the oxidation tank has an outlet, and a drainage component that acts on the flocculation tank is installed at the outlet. The jet agitation assembly includes a rotating cylinder rotatably installed between the inner walls of the oxidation tank. Multiple sets of jet pipes connected to the rotating cylinder are distributed horizontally on the outer end wall of the rotating cylinder. Wastewater is used as a flow carrier to uniformly spray the supplied oxidant into the oxidation tank in a rotating jet manner. The detection box is equipped with an ORP detector and a control panel. The control panel contains an information acquisition module, a first-order dosing module, a measurement feedback module, and a second-order dosing module. The information acquisition module is used to acquire wastewater information flowing into the oxidation tank and send it to the first-stage dosing module. The first-stage dosing module obtains the oxidation dosage based on the wastewater information, generates a main dosing signal, and releases 90% of the oxidation dosage. The measurement feedback module is used to acquire wastewater treatment information, obtain the single dosing coefficient, generate a feedback dosing signal, and use 10% of the oxidation dosage as the initial second-stage oxidation dosage. Combined with the single dosing coefficient, the single dosing dosage is calculated and released sequentially. After generating the feedback replenishment signal, the first replenishment is performed using 10% of the initial oxidation dosage as the second-order initial oxidation dosage. The product of the second-order initial oxidation dosage and the initially obtained single replenishment coefficient is used as the single replenishment amount to release the oxidant. A second dosing is performed. The ratio of the newly measured real-time ORP value to the set ORP value is substituted into the preset dosing ratio model to calculate a new single dosing coefficient. The difference between the initial second-order oxidation dosage and the single dosing amount is used as the second-order continuous oxidation dosage. The product of the second-order continuous oxidation dosage and the newly obtained single dosing coefficient is used as the new single dosing amount to release the oxidant. This process is repeated until the measured real-time ORP value reaches the preset ORP value range. The second-order dosing module acquires residual pollution information in the wastewater, obtains the flocculation dosage, and generates a flocculation dosing signal.

2. The treatment device for wastewater from the production of cyanamide plant growth regulator according to claim 1, characterized in that: The sludge discharge structure includes multiple sludge discharge inclined pipes that are inclined toward the detection box, and each sludge discharge inclined pipe is rotatably installed with a spiral sludge conveying blade.

3. The treatment device for wastewater from the production of cyanamide plant growth regulator according to claim 1, characterized in that: The testing box is also equipped with a sealing component that is lifted and installed against the outside of the bottom of the sludge discharge structure. The sealing component includes a pair of electric push rods fixedly installed on the testing box. The telescopic ends of the pair of electric push rods extend into the testing box and are fixed with a sealing plate that fits against the inclined bottom of the sludge discharge pipe.

4. The treatment device for wastewater from the production of cyanamide plant growth regulator according to claim 1, characterized in that: The drainage assembly includes a movable, sealed, lifting and lowering opening and closing plate installed at the water outlet. A drainage plate inclined downward toward the flocculation tank is installed at the top of the opening and closing plate. A drainage pipe with a solenoid valve at one end is fixedly connected to the bottom end of the drainage plate, and a sampling pipe is connected to the other end of the drainage pipe.

5. The treatment device for wastewater from the production of cyanamide plant growth regulator according to claim 1, characterized in that: The process of obtaining the amount of oxidation dosage includes: The information acquisition module collects the cyanide content, heavy metal ion content, ammonia nitrogen content, and total wastewater volume of the wastewater flowing into the oxidation tank. The pollution treatment capacity is calculated by formulating the cyanide content, heavy metal ion content, and ammonia nitrogen content. The ratio of the pollution treatment capacity to the total wastewater volume is then substituted into a preset dosing ratio model to calculate the oxidation dosage.

6. The treatment device for wastewater from the production of cyanamide plant growth regulator according to claim 5, characterized in that: The process of obtaining the single-dose supplement coefficient includes: The information acquisition module collects the ORP value of wastewater in real time through the ORP detector, and substitutes the ratio of the measured real-time ORP value to the set ORP value into the preset dosing ratio model to calculate the single dosing coefficient.

7. The treatment device for wastewater from the production of cyanamide plant growth regulator according to claim 1, characterized in that: The process of obtaining the flocculant dosage includes: Wastewater discharged from the oxidation tank into the flocculation tank is sampled multiple times using a sampling tube. The turbidity of each sample is obtained using a turbidity meter. The average turbidity is calculated, and the total amount of remaining wastewater discharged into the flocculation tank is obtained. The ratio of the average turbidity to the total amount of remaining wastewater is substituted into a preset flocculation dosage model to calculate the flocculation dosage.

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