Equipment and methods for treating residual waste of iodine contrast agents

Abstract

The application relates to a treatment device and method for iodine contrast agent residual waste, and relates to the technical field of medical waste treatment.The device comprises a pretreatment assembly, a degradation assembly and a separation assembly.The pretreatment assembly is used for collecting and pretreating the iodine contrast agent residual waste, the degradation assembly is used for degrading the pretreated waste, and the separation assembly is used for separating the degradation product.The pretreatment assembly, the degradation assembly and the separation assembly are combined to realize the collection and treatment of the iodine contrast agent residual waste, improve the treatment efficiency of the iodine contrast agent residual waste, and reduce the probability of directly discharging the iodine contrast agent residual waste to pollute the environment.

Description

Technical Field

[0001] This application relates to the field of medical waste treatment technology, and in particular to a treatment device and method for residual iodine contrast agent waste. Background Technology

[0002] Iodine contrast agents are commonly used X-ray contrast agents. These substances are primarily triiodophenyl ring derivatives used to enhance X-ray contrast, improve image quality, and increase diagnostic accuracy. The usage of iodine contrast agents is substantial, exceeding 1 billion applications worldwide. Residual iodine contrast agent waste refers to iodine contrast agents that were not completely injected into the patient after clinical use, as well as those excreted from the patient's body (99% of iodine contrast agents are excreted unchanged in urine and feces after injection). Uninjected iodine contrast agents mainly refer to the dosage calculated based on the patient's body weight during clinical examinations. The typical injection dose is 50-100 ml. Assuming a 100 ml vial, the residual amount per patient varies from 10-50 ml. A portion of the residual iodine contrast agent is disposed of as general medical waste, while the remainder is directly poured into the sewer system.

[0003] Furthermore, iodine contrast agents have an average half-life of approximately 2 hours in the human body, with 75% of the administered dose excreted into hospital wastewater via urine or feces within 4 hours, and nearly 100% within 24 hours. They have been identified as a major source of increased concentrations of absorbable organic halogens (AOX) in hospital wastewater. Iodine contrast agent waste contains high concentrations of iodine, and direct discharge without treatment can harm water sources and soil, potentially impacting ecosystems and human health. The occurrence of iodine contrast agents in the environment has been extensively observed worldwide. Although their toxicity is low, their presence during wastewater treatment and disinfection can lead to the formation of toxic byproducts.

[0004] Currently, there are no specialized equipment systems for the treatment of iodine contrast agent waste, either domestically or internationally. Hospitals also lack such systems. Therefore, most hospitals currently use basic wastewater treatment methods to treat iodine contrast agent waste. Alternatively, they may collect the waste and add reagents to the polluted water. These reagents react with the iodine contrast agent to degrade its concentration, often through chlorination or chlorination. However, even after chlorination, a concentration of mg / L can still be detected in the water, requiring further treatment and thus reducing the efficiency of iodine contrast agent waste treatment. Summary of the Invention

[0005] To improve the treatment efficiency of iodine contrast agent waste, this invention application provides a treatment device and method for iodine contrast agent waste.

[0006] This application provides a device and method for treating residual waste from iodine contrast agents, which adopts the following technical solution:

[0007] An apparatus for treating residual iodine contrast agent waste includes a pretreatment component, a degradation component, and a separation component. The pretreatment component is used to collect and pretreat the residual iodine contrast agent waste, the degradation component is used to degrade the pretreated waste, and the separation component is used to separate the degraded products.

[0008] By adopting the above technical solution, the pretreatment component collects and pre-treats the residual iodine contrast agent waste, ensuring that the residual iodine contrast agent waste meets suitable degradation conditions. Then, the degradation component degrades the pre-treated waste, and finally, the separation component separates and collects the degradation products. This achieves the collection and treatment of residual iodine contrast agent waste, improves the treatment efficiency of residual iodine contrast agent waste, and reduces the probability of direct discharge of residual iodine contrast agent waste polluting the environment.

[0009] Optionally, the preprocessing component includes:

[0010] A collection container for collecting and temporarily storing residual iodine contrast agent waste;

[0011] A pH adjustment tank is connected to a collection tank and used to adjust the pH of waste. The pH adjustment tank is equipped with two reagent tanks, which are respectively filled with acidic reagent and alkaline reagent.

[0012] A pH meter is installed on the regulating tank and is used to detect the pH of the solution inside the regulating tank.

[0013] By adopting the above technical solution, the residual waste solution of iodine contrast agent collected from various parts of the hospital is collected in a collection tank. When centralized treatment is required, part of the waste solution enters the adjustment tank. The pH meter tests the solution, and acidic or alkaline reagents are added as needed to make the pH of the solution meet the degradation requirements, thereby achieving the pretreatment of the residual waste solution of iodine contrast agent.

[0014] Optionally, the degradation component includes:

[0015] An oxidation tank is used to oxidize waste after pH adjustment. The oxidation tank is equipped with an oxidant addition pipe and a stirring assembly.

[0016] A filter screen is disposed inside the oxidation tank and is used to filter out unreacted oxides;

[0017] A light chamber is connected to an oxidation tank and is used to photodegrade oxidized waste. The light chamber is equipped with ultraviolet lamps.

[0018] By adopting the above technical solution, the pH-adjusted solution enters the oxidation tank, and the oxidant is added to the oxidation tank through the addition tube. The stirring component is activated to increase the mixing efficiency of the oxidant and the solution. The solution mixed with oxidizing free radicals passes through the filter screen into the light box for ultraviolet light degradation. Some unreacted oxidant and particulate matter in the solution remain on the filter screen for recycling. Under ultraviolet light irradiation, the oxidant couples with the ultraviolet light to generate highly reactive free radicals, which are used to degrade the iodine contrast agent. By adding the oxidant to the solution in advance, the efficiency of ultraviolet degradation is increased. At the same time, the pH of the solution is adjusted in the pretreatment to meet the optimal conditions for photodegradation, thereby improving the degradation effect of the iodine contrast agent and thus improving the treatment efficiency of the remaining waste of the iodine contrast agent.

[0019] Optionally, the separation component includes:

[0020] A separation chamber is connected to a light-illuminating chamber and is used to separate substances after light exposure. The separation chamber is equipped with a partition plate that divides the separation chamber into a first chamber and a second chamber. The first chamber is connected to the light-illuminating chamber through a conveying assembly, and the second chamber is connected to the top of the first chamber.

[0021] The first dosing tube is disposed in the first chamber and is used to add a reagent to cause iodine to precipitate.

[0022] The second dosing tube is connected to the second chamber and is used to add a reagent to cause acidic ions to precipitate.

[0023] By adopting the above technical solution, the photodegradation product is a mixed solution containing iodine ions and acidic ions. The mixed solution first enters the first chamber through the conveying component. Then, the first dosing tube adds a drug to the first chamber to precipitate iodine. The supernatant flows into the second chamber, where the second dosing tube adds a drug to precipitate acidic ions. The supernatant is then discharged. This achieves the separation of iodine and acidic ions, reducing the probability of direct discharge of photodegradation products causing adverse environmental impacts. The recovered iodine can also be used as one of the raw materials for the production of iodine contrast agents, thereby saving energy, improving environmental performance, and thus improving the treatment efficiency of iodine contrast agent waste.

[0024] Optionally, the conveying assembly includes a conveying pump and a conveying pipe, wherein the suction end of the conveying pump is connected to the inside of the light box, and the conveying pipe is located at the output end of the conveying pump and extends into the first chamber.

[0025] By adopting the above technical solution, after the ultraviolet lamp irradiation time is reached, the ultraviolet lamp is turned off, the delivery pump is turned on, and the solution enters the first chamber through the delivery pipe for treatment, thereby improving the convenience of iodine contrast agent waste solution treatment.

[0026] Optionally, a flow divider is provided in the first chamber, which divides the first chamber into a reaction zone and a buffer zone. The delivery pipe extends into the reaction zone, and the bottom ends of the reaction zone and the buffer zone are connected. The buffer zone and the top end of the second chamber are connected.

[0027] By adopting the above technical solution, the solution after light exposure first enters the reaction zone for chemical reaction. Iodine precipitates and settles at the bottom of the reaction zone and buffer zone. The liquid level gradually rises and enters the buffer zone. The liquid at the top of the buffer zone enters the second chamber for subsequent treatment. The solution entering the first chamber is diverted by a flow divider, reducing the probability that the solution in the first chamber flows into the second chamber without reacting. This improves the treatment effect of the iodine contrast agent and thus increases the treatment efficiency of the remaining waste of the iodine contrast agent.

[0028] Optionally, the tail end of the separation box is provided with an adsorption assembly, the adsorption assembly comprising:

[0029] An adsorption box, which is connected to the second chamber via a water supply pipe;

[0030] An activated carbon plate is placed inside a separation chamber and is used to adsorb and purify the treated water.

[0031] By adopting the above technical solution, the supernatant of the separated solution enters the adsorption box, where activated carbon plates adsorb and purify the treated water to reduce the content of pollutants in the water. The purified water can be recycled, thereby saving water resources and reducing the probability of direct discharge of iodine contrast agent causing adverse environmental impacts. Therefore, the treatment efficiency of residual iodine contrast agent waste is improved.

[0032] Optionally, the stirring assembly includes:

[0033] A stirring shaft is rotatably mounted inside an oxidation tank, and the oxidation tank is equipped with a drive unit for driving the stirring shaft to rotate.

[0034] A stirring paddle, which is mounted on a stirring shaft and is used to mix oxidants and waste.

[0035] By adopting the above technical solution, the oxidant is added into the oxidation tank, the drive unit is started to drive the stirring shaft to rotate, and the rotation of the stirring shaft drives the stirring paddle to stir and mix the oxidant and the residual waste solution of iodine contrast agent, thereby improving the mixing efficiency of the oxidant and the residual waste solution of iodine contrast agent.

[0036] A method for treating residual iodine contrast agent waste using the aforementioned treatment equipment, characterized by comprising the following steps:

[0037] The first step is to temporarily store the remaining waste solution of iodine contrast agent collected from various locations in a collection tank;

[0038] The second step is to transfer the solution in the collection tank to the adjustment tank in batches, and add acidic or alkaline reagents according to the value displayed by the pH meter so that the pH of the final solution is neutral.

[0039] The third step is to transfer the solution in the conditioning tank to the oxidation tank, add metal sulfides and sulfites into the oxidation tank through the addition pipe, and at the same time start the stirring component to stir the solution.

[0040] The fourth step is to transfer the solution mixture in the oxidation tank to the light box. Unreacted metal sulfides and some particulate matter remain on the filter screen. Then, turn on the ultraviolet lamp to irradiate the solution.

[0041] Fifth step: turn on the delivery pump. The solution after light exposure enters the first chamber through the delivery pipe. Add starch potassium iodide to the first chamber through the first dosing pipe. Iodine precipitates and settles inside the first chamber. The supernatant enters the second chamber. Add calcium chloride or barium chloride to the second chamber through the second dosing pipe. Sulfate ions precipitate at the bottom of the second chamber. The supernatant containing chloride ions enters the adsorption tank through the water delivery pipe.

[0042] In the sixth step, the supernatant containing chloride ions flows through the activated carbon plate, where the chloride ions are adsorbed and purified, resulting in a treated aqueous solution.

[0043] By adopting the above technical solution, the pH of the waste solution is first adjusted to neutral, and then an oxidant is added. The metal sulfide activates the sulfite to produce sulfate ions. Sulfate ions have strong oxidizing properties. Through the combination of light and sulfate ion oxidation, the degradation efficiency of the iodine contrast agent waste is improved. Unreacted metal sulfides are filtered through a filter screen. The filtered metal sulfides can be recycled, thus saving costs and reducing the impact of particulate matter on subsequent reactions. The product generated after light degradation is a mixture of sulfate ions and iodate ions. First, starch and potassium iodide are added, and elemental iodine is precipitated. Then, calcium chloride or barium chloride is added, and calcium sulfate or barium sulfate precipitates, leaving chloride ions free in the solution. Finally, the chloride ions are adsorbed by an activated carbon plate. This achieves the treatment of the iodine contrast agent waste, improves the treatment efficiency of the iodine contrast agent waste, and reduces the probability of direct discharge of iodine contrast agent waste into the environment.

[0044] In summary, this application includes at least one of the following beneficial technical effects:

[0045] 1. The pretreatment component collects and pre-treats the residual iodine contrast agent waste to meet suitable degradation conditions. Then, the degradation component degrades the pre-treated waste. Finally, the separation component separates and collects the degradation products. This achieves the collection and treatment of residual iodine contrast agent waste, improves the treatment efficiency of residual iodine contrast agent waste, and reduces the probability of direct discharge of residual iodine contrast agent waste into the environment.

[0046] 2. After adjusting the pH, the solution enters the oxidation tank. Oxidant is added to the oxidation tank, and the stirring component is activated to increase the mixing efficiency of the oxidant and the solution. The solution, mixed with oxidizing free radicals, passes through a filter and enters the light chamber for ultraviolet (UV) degradation. Some unreacted oxidant and particulate matter in the solution remain on the filter for later recycling. Under UV irradiation, the oxidant couples with the UV light to generate highly reactive free radicals, which are used to degrade the iodine contrast agent. By adding oxidant to the solution beforehand, the efficiency of UV degradation is increased. At the same time, the pH of the solution is adjusted in conjunction with pretreatment to meet the optimal conditions for photodegradation, thereby improving the degradation effect of the iodine contrast agent and thus increasing the treatment efficiency of the remaining waste from the iodine contrast agent.

[0047] 3. The photodegradation products are a mixed solution containing iodide ions and acidic ions. The mixed solution first enters the first chamber through the conveying component. The first dosing tube adds a drug to the first chamber to precipitate iodine. The supernatant flows into the second chamber. The second dosing tube adds a drug to the second chamber to precipitate acidic ions. The supernatant is then discharged. This achieves the separation of iodine and acidic ions, reducing the probability of direct discharge of photodegradation products causing adverse environmental impacts. The recovered iodine can also be used as one of the raw materials for the production of iodine contrast agents, thereby saving energy, improving environmental performance, and thus improving the treatment efficiency of iodine contrast agent waste.

[0048] 4. After separation, the supernatant of the solution enters the adsorption box, where activated carbon plates adsorb and purify the treated water to reduce the content of pollutants. The purified water can be recycled, thus saving water resources and reducing the probability of direct discharge of iodine contrast agent causing adverse environmental impacts. Therefore, the treatment efficiency of residual iodine contrast agent waste is improved.

[0049] 5. The device of the present invention is simple and has wide applicability. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the overall structure of this application;

[0051] Figure 2 This is a schematic diagram of the preprocessing component in this application;

[0052] Figure 3This is a schematic diagram of the degradation component in this application, in which the oxidation tank and the light box are partially cut apart;

[0053] Figure 4 This is a schematic diagram of the structure of the separate components in this application;

[0054] Figure 5 This is a cross-sectional view of the separation chamber and adsorption chamber in this application.

[0055] Reference numerals: 1. Pretreatment component; 11. Collection tank; 111. Inlet pipe; 12. Adjustment tank; 121. First inlet pipe; 122. Inlet pump; 13. pH meter; 14. Reagent tank; 15. Reagent tube; 16. Solenoid valve; 2. Degradation component; 21. Oxidation tank; 211. Second inlet pipe; 212. Top cover; 213. Addition pipe; 214. Overlap groove; 22. Filter screen; 221. Mounting rod; 23. Illumination box; 231. Third inlet pipe; 232. Ultraviolet lamp; 3. Separation component; 31. Separation 32. First dosing pipe; 321. First dosing chamber; 33. Second dosing pipe; 331. Second dosing chamber; 34. Divider plate; 35. First chamber; 351. Reaction zone; 352. Buffer zone; 36. Second chamber; 37. Diverter plate; 38. Suction pump; 4. Stirring assembly; 41. Stirring shaft; 411. Drive component; 42. Stirring paddle; 5. Conveying assembly; 51. Conveying pump; 52. Conveying pipe; 6. Adsorption assembly; 61. Adsorption box; 611. Water supply pipe; 62. Activated carbon plate; 63. Water outlet pipe. Detailed Implementation

[0056] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0057] This application discloses an apparatus and method for treating residual iodine contrast agent waste.

[0058] Reference Figure 1 A treatment device for residual iodine contrast agent waste includes a pretreatment component 1, a degradation component 2, and a separation component 3. The pretreatment component 1 is used to collect and pretreat the residual iodine contrast agent waste, the degradation component 2 is used to degrade the pretreated waste, and the separation component 3 is used to separate the degraded products.

[0059] Reference Figure 1 and Figure 2The pretreatment component 1 includes a collection tank 11, an adjustment tank 12, and a pH meter 13. The collection tank 11 is used to collect and temporarily store the remaining waste of the iodine contrast agent. An inlet pipe 111 is fixedly installed at the top of the collection tank 11. The adjustment tank 12 is connected to the collection tank 11 through a first inlet pipe 121 and is used to adjust the pH of the waste. An inlet pump 122 is installed on the first inlet pipe 121. Two reagent tanks 14 are fixedly installed on the upper surface of the adjustment tank 12. The two reagent tanks 14 contain acidic reagents and alkaline reagents, respectively. A reagent tube 15 is connected to the bottom of the reagent tank 14 and extends into the adjustment tank 12. A solenoid valve 16 is installed on the reagent tube 15. The pH meter 13 is installed on the adjustment tank 12 and the detection element extends into the adjustment tank 12 to detect the pH of the solution in the adjustment tank 12.

[0060] Reference Figure 1 and Figure 3 The degradation component 2 includes an oxidation tank 21, a filter screen 22, and a light box 23. The oxidation tank 21 is connected to the adjustment tank 12 through a second infusion pipe 211 and is used to oxidize the waste after pH adjustment. An infusion pump 122 is installed on the second infusion pipe 211. The top of the oxidation tank 21 is open. The top of the oxidation tank 21 is covered with a top cover 212 to cover the opening. An addition pipe 213 for adding oxidant is fixedly installed on the top cover 212.

[0061] Reference Figure 1 and Figure 3 The oxidation tank 21 is equipped with a stirring assembly 4, which includes a stirring shaft 41 and a stirring paddle 42. The stirring shaft 41 is rotatably mounted on the inner top wall of the top cover 212 and extends vertically downward. The top cover 212 is equipped with a driving component 411 for driving the stirring shaft 41 to rotate. In this embodiment, the driving component 411 is a motor. Multiple stirring paddles 42 are arranged in a circumferential array around the axis of the stirring shaft 41, and the stirring paddles 42 are used to mix the oxidant and waste.

[0062] Reference Figure 1 and Figure 3 The filter screen 22 is installed inside the oxidation tank 21 and below the stirring shaft 41 to filter unreacted oxides. Two vertical mounting rods 221 are fixedly installed on the upper surface of the filter screen 22. Two overlapping grooves 214 are opened on the upper surface of the oxidation tank 21, and the top of the mounting rods 221 overlaps in the overlapping grooves 214. By moving the top cover 212 to move the stirring shaft 41 away from the oxidation tank 21, and then moving the mounting rods 221 to disengage from the overlapping grooves 214, the filter screen 22 can be disassembled to facilitate the collection and treatment of residual particles on the filter screen 22.

[0063] Reference Figure 1 and Figure 3The light box 23 is connected to the oxidation tank 21 through the third infusion pipe 231 and is used to degrade the oxidized waste by light. The third infusion pipe 231 is equipped with an infusion pump 122, and the inner wall of the light box 23 is equipped with an ultraviolet lamp 232.

[0064] Reference Figure 1 and Figure 4 The separation component 3 includes a separation box 31, a first dosing tube 32, and a second dosing tube 33. The separation box 31 is connected to the light box 23 and is used to separate the substances after light exposure. A vertical partition plate 34 is fixedly installed on the bottom wall of the separation box 31. The partition plate 34 divides the separation box 31 into a first chamber 35 and a second chamber 36. The first chamber 35 is connected to the light box 23 through the conveying component 5, and the second chamber 36 is connected to the top of the first chamber 35.

[0065] Reference Figure 1 and Figure 4 The conveying assembly 5 includes a conveying pump 51 and a conveying pipe 52. The suction end of the conveying pump 51 is connected to the light box 23, and the conveying pipe 52 is located at the output end of the conveying pump 51 and extends into the first chamber 35.

[0066] Reference Figure 4 and Figure 5 A vertical flow divider 37 is fixedly installed in the first chamber 35. The top of the flow divider 37 is flush with the top of the first chamber 35. The flow divider 37 divides the first chamber 35 into a reaction zone 351 and a buffer zone 352. The delivery pipe 52 extends into the reaction zone 351. The bottom ends of the reaction zone 351 and the buffer zone 352 are connected. The buffer zone 352 is connected to the top of the second chamber 36.

[0067] Reference Figure 4 and Figure 5 The first dosing tube 32 is fixedly installed on the outer wall of the first chamber 35 and extends into the reaction zone 351. The end of the first dosing tube 32 away from the reaction zone 351 is provided with a first dosing chamber 321. Dosing is done into the reaction zone 351 through the first dosing chamber 321 and the first dosing tube 32 to cause iodine to precipitate. The second dosing tube 33 is fixedly installed on the outer wall of the second chamber 36 and extends into the second chamber 36. The end of the second dosing tube 33 away from the second chamber 36 is provided with a second dosing chamber 331. Dosing is done into the second chamber 36 through the second dosing chamber 331 and the second dosing tube 33 to cause acidic ions to precipitate.

[0068] Reference Figure 4 and Figure 5 Solenoid valves 16 are provided on both the first dosing pipe 32 and the second dosing pipe 33, and suction pumps 38 for suctioning the precipitate are provided on the outer walls of both the first chamber 35 and the second chamber 36.

[0069] Reference Figure 4 and Figure 5 The second chamber 36 is equipped with an adsorption assembly 6 at its tail end. The adsorption assembly 6 includes an adsorption box 61 and an activated carbon plate 62. The adsorption box 61 is connected to the second chamber 36 through a water supply pipe 611. An infusion pump 122 is installed on the water supply pipe 611. Multiple activated carbon plates 62 are provided. Multiple activated carbon plates 62 are vertically spaced inside the adsorption box 61 and located below the water supply pipe 611. The activated carbon plates 62 are used to adsorb and purify the treated water. A water outlet pipe 63 for water discharge is fixedly installed on the outer wall of the bottom end of the adsorption box 61.

[0070] Reference Figures 1-5 A method for treating residual waste of iodine contrast agent. In this method, sulfuric acid is used as the acidic reagent, sodium hydroxide is used as the alkaline reagent, and metal sulfides and sulfites are used as the oxidizing agents. Cobalt sulfide is used as the metal sulfide, and potassium sulfite is used as the sulfite. The reagent in the first dosing chamber 321 is starch-potassium iodide, and the reagent in the second dosing chamber 331 is calcium chloride. In other embodiments, the metal sulfide can be any one of copper sulfide, cobalt sulfide, manganese sulfide, and iron sulfide, and the sulfite can be any one of potassium sulfite, sodium sulfite, calcium sulfite, and magnesium sulfite. The reagent in the enemy dosing chamber can be barium chloride. The products used in this method and the pH meter 13 are commercially available products.

[0071] Includes the following steps:

[0072] The first step is to temporarily store the remaining waste solution of iodine contrast agent collected from various locations in the collection tank 11. The remaining waste solution of iodine contrast agent, including iodine contrast agent that was not completely injected into the patient and some iodine contrast agent that was excreted from the patient, is collected from various locations where iodine contrast agent is used, such as the X-ray room, CT room, and interventional room. The waste solution is then introduced into the collection tank 11.

[0073] The second step involves using the infusion pump 122 and the first infusion tube 121 to transfer the solution in the collection tank 11 to the regulating tank 12 in batches. The solution is then adjusted according to the pH value displayed by the pH meter 13. If the solution is acidic, an alkaline reagent is added; if the solution is alkaline, an acidic reagent is added, so that the final solution pH is 7.

[0074] The third step involves using the infusion pump 122 and the second infusion pipe 211 to transfer the solution in the regulating tank 12 to the oxidation tank 21. Cobalt sulfide and potassium sulfite are then added to the oxidation tank 21 through the addition pipe 213. The amount of cobalt sulfide added is 0.05 g / L, and the concentration of sulfite is within the range of 500 μM. At the same time, the motor is started to stir the solution with the agitator for 30 minutes.

[0075] The fourth step involves using the infusion pump 122 and the third infusion tube 231 to transfer the solution mixture in the oxidation tank 21 to the light box 23. Unreacted cobalt sulfide and some particulate matter remain on the filter screen 22. The ultraviolet lamp 232 is then turned on to irradiate the solution for 10 minutes.

[0076] Fifth step, turn on the delivery pump 51, and the solution after light exposure enters the first chamber 35 through the delivery pipe 52. Add starch potassium iodide into the first chamber 35 through the first dosing pipe 32. Iodine precipitates and settles inside the first chamber 35. The supernatant enters the second chamber 36. Add calcium chloride or barium chloride into the second chamber 36 through the second dosing pipe 33. Sulfate ions precipitate at the bottom of the second chamber 36. The supernatant containing chloride ions enters the adsorption tank 61 through the water delivery pipe 611.

[0077] In the sixth step, the supernatant containing chloride ions flows through the activated carbon plate 62, where the chloride ions are adsorbed and purified. The treated aqueous solution is discharged through the outlet pipe 63 at the bottom of the adsorption tank 61, and the treated water can be retained for recycling.

[0078] The ionic equations involved in this method include: S 2- +SO3 2- —SO4 2- IO3 - +5I - +6H + —3I₂ (elemental) + 3H₂O; CaCl₂ + SO₄²⁻ 2— Ca2SO4 (precipitate) + 2Cl - .

[0079] The working principle of this application embodiment is as follows:

[0080] First, the remaining waste from the iodine contrast agent is collected. During treatment, the pH of the waste solution is adjusted before it enters the oxidation tank 21. An oxidant is added to the oxidation tank 21, and stirring is performed simultaneously to increase the mixing efficiency of the oxidant and the solution. The solution, which contains oxidizing free radicals, passes through the filter 22 into the light chamber 23 for ultraviolet light degradation. Some unreacted oxidant and particulate matter in the solution remain on the filter 22 for later recycling. Under the irradiation of the ultraviolet lamp 232, the oxidant couples with the ultraviolet light to generate highly reactive free radicals, which are used to degrade the iodine contrast agent. The degraded solution contains sulfate ions and iodate ions. Reagents are added sequentially to precipitate iodine and sulfuric acid. Finally, the treated water is purified by activated carbon adsorption. By adding an oxidant to the solution beforehand, the efficiency of ultraviolet degradation is increased. At the same time, the pH of the solution is adjusted in the pretreatment to meet the optimal conditions for photodegradation. Finally, separation and adsorption are performed, thereby improving the degradation effect of the iodine contrast agent and thus improving the treatment efficiency of the remaining waste from the iodine contrast agent.

[0081] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A processing apparatus for iodine contrast agent residual waste, characterized by: The application relates to a waste treatment device for iodine contrast agent, which comprises a pretreatment assembly (1), a degradation assembly (2) and a separation assembly (3), the pretreatment assembly (1) is used for collecting and pretreating iodine contrast agent waste, the degradation assembly (2) is used for degrading the pretreated waste, and the separation assembly (3) is used for separating the degradation product. The pretreatment assembly (1) comprises: a collecting tank (11) used for collecting and temporarily storing iodine contrast agent waste; an adjusting tank (12) connected with the collecting tank (11) and used for adjusting the PH value of the waste, two reagent tanks (14) are arranged on the adjusting tank (12), and the two reagent tanks (14) are respectively filled with acidic reagent and alkaline reagent; a PH detector (13) arranged on the adjusting tank (12) and used for detecting the PH value of the solution in the adjusting tank (12); the degradation assembly (2) comprises: an oxidation tank (21) used for oxidizing the waste after PH adjustment, an adding pipe (213) for adding oxidizing agent is arranged on the oxidation tank (21), and a stirring assembly (4) is arranged on the oxidation tank (21); a filter screen (22) arranged in the oxidation tank (21) and used for filtering the unreacted oxidizing agent; an illumination box (23) connected with the oxidation tank (21) and used for illuminating and degrading the waste after oxidation, and a UV lamp (232) is arranged in the illumination box (23); the separation assembly (3) comprises: a separation box (31) connected with the illumination box (23) and used for separating the material after illumination, a separation plate (34) is arranged in the separation box (31), the separation plate (34) divides the separation box (31) into a first chamber (35) and a second chamber (36), the first chamber (35) is communicated with the illumination box (23) through a conveying assembly (5), and the second chamber (36) is communicated with the top end of the first chamber (35); a first adding pipe (32) arranged in the first chamber (35) and used for adding reagent to make iodine element precipitate; a second adding pipe (33) communicated with the second chamber (36) and used for adding reagent to make acid ions precipitate.

2. A processing apparatus for iodine contrast agent residual waste according to claim 1, characterized in that: The conveying assembly (5) comprises a conveying pump (51) and a conveying pipe (52), the suction end of the conveying pump (51) is communicated with the illumination box (23), and the conveying pipe (52) is arranged at the output end of the conveying pump (51) and extends into the first chamber (35).

3. A processing apparatus for iodine contrast agent residual waste according to claim 2, characterized in that: A flow dividing plate (37) is arranged in the first chamber (35), the flow dividing plate (37) divides the first chamber (35) into a reaction area (351) and a buffer area (352), the conveying pipe (52) extends into the reaction area (351), the bottom ends of the reaction area (351) and the buffer area (352) are communicated, and the top end of the buffer area (352) is communicated with the second chamber (36).

4. The processing apparatus for iodine contrast agent residual waste according to claim 1, characterized by: The separation tank (31) tail end is equipped with adsorption assembly (6), the adsorption assembly (6) includes: Adsorption tank (61), the adsorption tank (61) with second chamber (36) through water pipe (611) communication; Activated carbon plate (62), the activated carbon plate (62) is set in separation tank (31) and is used to adsorb purification to the water after processing.

5. The processing apparatus for iodine contrast agent residual waste according to claim 1, characterized by: The stirring assembly (4) includes: Stirring shaft (41), the stirring shaft (41) rotation is arranged in oxidation tank (21), the oxidation tank (21) is equipped with the driving part (411) for driving stirring shaft (41) rotation; Stirring paddle (42), the stirring paddle (42) is set on stirring shaft (41) and is used to mix oxidant and waste.

6. A method for processing iodine contrast agent residual waste using the processing apparatus according to claim 4, characterized by: Including the following steps: First, the iodine contrast agent remaining waste solution collected from various places is temporarily stored in the collection tank (11); Second, the solution in the collection tank (11) is transported into the adjusting tank (12) in batches, and the acidic reagent or basic reagent is added according to the value displayed by the PH detector (13) to make the PH of the final solution neutral; Third, the solution in the adjusting tank (12) is transported into the oxidation tank (21), and metal sulfide and sulfite are added into the oxidation tank (21) through the adding pipe (213), and the stirring assembly (4) is started to stir the solution; Fourth, the solution mixture in the oxidation tank (21) is transported into the light box (23), and the unreacted metal sulfide and part of the particulate matter are left on the filter screen (22), and the ultraviolet lamp (232) is turned on to irradiate the solution; Fifth, the delivery pump (51) is turned on, the solution after irradiation enters the first chamber (35) through the delivery pipe (52), and the starch potassium iodide is added into the first chamber (35) through the first dosing pipe (32), the iodine element is precipitated in the first chamber (35), and the supernatant enters the second chamber (36), and the calcium chloride or barium chloride is added into the second chamber (36) through the second dosing pipe (33), the sulfate ion is precipitated at the bottom of the second chamber (36), and the supernatant containing chloride ions enters the adsorption tank (61) through the water pipe (611); Sixth, the supernatant containing chloride ions flows through the activated carbon plate (62), and the chloride ions are adsorbed and purified by the activated carbon plate (62), and the treated aqueous solution is obtained.

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