A rapid COD detection device for industrial wastewater

Abstract

This utility model discloses a rapid COD detection device for industrial wastewater, including a portable detection box. A control module is installed at one end of the portable detection box, and a reaction chamber is opened at the other end. A wastewater COD detection structure is installed in the reaction chamber. This utility model involves installing a digestion reaction component in the middle digestion chamber. Filtered wastewater is injected into a spiral quartz tube through a micro-pump, and the flow rate is controlled by the micro-pump to allow the wastewater to flow slowly within the spiral quartz tube. An ultraviolet LED lamp irradiates the nano-titanium dioxide coating on the outer surface of the spiral quartz tube, generating strong oxidizing free radicals. These free radicals penetrate through the tube wall to the inner aqueous phase, directly decomposing organic matter in the water. A three-electrode structure in the lower detection chamber applies voltage and detects the peak oxidation current. The detection signal is transmitted to the control module. A filter screen quickly removes suspended solids from the injected wastewater.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring technology, specifically to a rapid detection device for COD in industrial wastewater. Background Technology

[0002] COD testing of industrial wastewater is a core indicator for measuring the degree of organic pollution in water samples. It is used to assess the effectiveness of wastewater treatment and environmental compliance. It is widely used in industrial wastewater treatment, environmental monitoring and pollution control. However, existing equipment is large and bulky, making it difficult to conduct rapid on-site testing.

[0003] The prior art, disclosed in patent document CN216484953U, presents the following technical solution: a COD detection device, comprising a housing, a first mounting cavity within the housing, a placement groove at the upper end of the housing, the placement groove communicating with the first mounting cavity, a fixing mechanism within the first mounting cavity, the fixing mechanism including a connecting ring rotatably connected to the top of the first mounting cavity, a disc fixedly connected to the lower end of the connecting ring, a circular groove at the upper end of the disc, a worm gear mounted on the side wall of the disc, and multiple moving grooves on the inner wall of the placement groove, each moving groove having a moving block slidably connected therein.

[0004] The above-mentioned technical solution requires placing the prepared test tube solution into the measuring instrument before detection can be performed. However, the solution preparation step is time-consuming and cumbersome, making it difficult to quickly detect wastewater. Utility Model Content

[0005] The purpose of this invention is to provide a rapid COD detection device for industrial wastewater to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rapid detection device for COD in industrial wastewater, comprising a portable detection box, a control module installed at one end of the portable detection box, and a reaction chamber opened at the other end of the portable detection box, wherein a wastewater COD detection structure is installed in the reaction chamber.

[0007] The upper and lower inner walls of the reaction chamber are fixedly connected to a partition, which divides the reaction chamber into an upper liquid storage chamber, a middle digestion chamber and a lower detection chamber. The upper liquid storage chamber is equipped with a sample injection assembly, and the middle digestion chamber is equipped with a digestion reaction assembly.

[0008] The sample injection assembly includes a frame-shaped support plate and a filter plate. The frame-shaped support plate is fixedly connected to the upper inner wall of the upper liquid storage chamber. Positioning rods are fixedly connected to the four corners of the frame-shaped support plate. Limiting grooves are opened at both ends of the positioning rods. Positioning holes are opened at the four corners of the filter plate. The positioning holes are inserted into the positioning rods. T-shaped guide grooves are opened in the middle of both ends of the filter plate. Vertical plates are slidably connected to both ends of the T-shaped guide grooves. Springs are provided between the two ends of the vertical plates. Insert plates are fixedly connected to the outer surface of the vertical plates near the positioning holes. The insert plates are inserted into the limiting grooves.

[0009] In the above technical solution, the filter screen can quickly remove suspended solids from the injected wastewater. The filter screen is supported on a frame-shaped support plate and connected to a positioning rod through a positioning hole. It is also inserted into a limiting groove through an insert plate, which can fix the filter screen and facilitate disassembly to clean the filtered suspended solids.

[0010] The digestion reaction assembly includes a spiral quartz tube, which is fixed between two upper and lower partitions by a fixing plate. An annular plate is provided on the outer side of the spiral quartz tube, and ultraviolet LED lamps are arranged on the inner wall of the annular plate. The ultraviolet LED lamps are designed to correspond to each turn of the spiral quartz tube.

[0011] In the above technical solution, the ultraviolet LED lamp irradiation can stimulate the nano-titanium dioxide coating on the outer surface of the spiral quartz tube to generate strong oxidizing free radicals, which penetrate through the tube wall to the inner water phase and directly decompose organic matter in the water.

[0012] As a further preferred embodiment of this technical solution, the upper end of the reaction chamber is provided with a lid via a hinge.

[0013] As a further preferred embodiment of this technical solution, the inlet end of the spiral quartz tube passes through the upper partition and is equipped with a micro pump body, which is installed in the upper liquid storage chamber. The outlet end of the spiral quartz tube passes through the lower partition and can communicate with the lower detection chamber.

[0014] As a further preferred embodiment of this technical solution, a three-electrode structure is installed in the lower detection cavity, and the three-electrode structure is connected to the control module.

[0015] In the above technical solution, a voltage is applied to the three-electrode structure set in the lower detection cavity to detect the peak value of the oxidation current. The detection signal is transmitted to the control module and displayed on the display screen.

[0016] As a further preferred embodiment of this technical solution, a drain pipe is provided on the side of the lower detection chamber away from the control module, and a valve is provided on the drain pipe.

[0017] As a further preferred embodiment of this technical solution, the outer surface of the spiral quartz tube is uniformly coated with a nano-titanium dioxide coating.

[0018] As a further preferred embodiment of this technical solution, the control module automatically controls the digestion time, temperature, and detection voltage scanning operation through a microcontroller.

[0019] This utility model provides a rapid COD detection device for industrial wastewater, which has the following beneficial effects:

[0020] (1) This utility model installs a sample injection component at the upper end of the upper liquid storage chamber. The filter screen plate set therein can quickly remove suspended matter in the injected wastewater. The filter screen plate is supported on the frame support plate and connected to the positioning rod through the positioning hole. It is also inserted into the limiting groove through the insert plate, thereby fixing the filter screen plate and making it easy to disassemble and clean the filtered suspended matter.

[0021] (2) This utility model installs a digestion reaction component in the middle digestion chamber. The filtered wastewater is injected into the spiral quartz tube through a micro pump. The flow rate is controlled by the micro pump to make the wastewater flow slowly in the spiral quartz tube. The ultraviolet LED lamp can stimulate the nano titanium dioxide coating on the outer surface of the spiral quartz tube to generate strong oxidizing free radicals. These free radicals penetrate through the tube wall to the inner water phase and directly decompose the organic matter in the water. The three-electrode structure in the lower detection chamber applies voltage to detect the peak value of the oxidation current. The detection signal is transmitted to the control module and displayed on the screen. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0024] Figure 3 This is a partial cross-sectional view of the present invention;

[0025] Figure 4 This is an enlarged view of Figure A of this utility model;

[0026] In the diagram: 1. Portable testing box; 2. Control module; 3. Wastewater COD detection structure; 4. Reaction chamber; 31. Box cover; 32. Partition; 33. Sample injection assembly; 331. Frame-type support plate; 332. Positioning rod; 3321. Limiting groove; 333. Filter screen plate; 334. Positioning hole; 335. T-shaped guide groove; 336. Vertical plate; 337. Spring; 338. Insert plate; 34. Digestion reaction assembly; 341. Spiral quartz tube; 342. Miniature pump body; 343. Ring plate; 344. Ultraviolet LED lamp; 35. Three-electrode structure; 36. Drain pipe. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] This utility model provides a technical solution: such as Figure 1 As shown in this embodiment, a rapid COD detection device for industrial wastewater includes a portable detection box 1. A control module 2 is installed at one end of the portable detection box 1. The control module 2 automatically controls the digestion time, temperature and detection voltage scanning operation through a microcontroller. A reaction chamber 4 is opened at the other end of the portable detection box 1. A box cover 31 is provided on the upper end of the reaction chamber 4 through a hinge. A wastewater COD detection structure 3 is installed inside the reaction chamber 4.

[0029] like Figure 2 As shown, the upper and lower inner walls of the reaction chamber 4 are fixedly connected with partitions 32, which divide the reaction chamber 4 into an upper liquid storage chamber, a middle digestion chamber and a lower detection chamber. The upper liquid storage chamber is equipped with a sample injection assembly 33, and the middle digestion chamber is equipped with a digestion reaction assembly 34.

[0030] like Figure 3 and Figure 4 As shown, the sample injection assembly 33 includes a frame-shaped support plate 331 and a filter plate 333. The frame-shaped support plate 331 is fixedly connected to the upper inner wall of the upper liquid storage chamber. Positioning rods 332 are fixedly connected to the four corners of the frame-shaped support plate 331. Limiting grooves 3321 are opened at both ends of the positioning rods 332. Positioning holes 334 are opened at the four corners of the filter plate 333. The positioning holes 334 are inserted into the positioning rods 332. T-shaped guide grooves 335 are opened in the middle of both ends of the filter plate 333. Vertical plates 336 are slidably connected to both ends of the T-shaped guide grooves 335. A spring is provided between the two vertical plates 336. Spring 337 and vertical plate 336 are both fixedly connected to insert plates 338 on the outer surface of the side near the positioning hole 334. Insert plates 338 are inserted into the limiting groove 3321. By installing the sample injection assembly 33 at the upper end of the upper liquid storage chamber, the filter screen 333 set therein can quickly remove suspended solids in the injected wastewater. The filter screen 333 is supported on the frame support plate 331 and is connected to the positioning rod 332 through the positioning hole 334. It is inserted into the limiting groove 3321 through the insert plate 338, thereby fixing the filter screen 333 and making it easy to disassemble and clean the filtered suspended solids.

[0031] like Figure 2 and Figure 3As shown, the digestion reaction assembly 34 includes a spiral quartz tube 341. The outer surface of the spiral quartz tube 341 is uniformly coated with a nano-titanium dioxide coating, which prolongs the wastewater flow time. The spiral quartz tube 341 is fixed between two upper and lower partitions 32 by a fixing plate. An annular plate 343 is provided on the outer side of the spiral quartz tube 341, and ultraviolet LED lamps 344 are arranged on the inner wall of the annular plate 343. The ultraviolet LED lamps 344 are designed to correspond to each turn of the spiral quartz tube 341. The liquid inlet end of the spiral quartz tube 341 passes through the upper partition 32 and is equipped with a micro pump body 342, which is installed in the upper liquid storage chamber. The liquid outlet end of the spiral quartz tube 341 passes through the lower partition 32 and can communicate with the lower detection chamber. A three-electrode junction is installed in the lower detection chamber. The three-electrode structure 35 is connected to the control module 2. A drain pipe 36 is provided on the side of the lower detection chamber away from the control module 2, and a valve is provided on the drain pipe 36. A digestion reaction component 34 is installed in the middle digestion chamber. The filtered wastewater is injected into the spiral quartz tube 341 through a micro pump 342, and the flow rate is controlled by the micro pump 342 to make the wastewater flow slowly in the spiral quartz tube 341. The ultraviolet LED lamp 344 can irradiate the nano titanium dioxide coating on the outer surface of the spiral quartz tube 341 to generate strong oxidizing free radicals, which penetrate through the tube wall to the inner water phase to directly decompose the organic matter in the water. The three-electrode structure 35 in the lower detection chamber applies voltage to detect the peak value of the oxidation current. The detection signal is transmitted to the control module 2 and displayed on the display screen.

[0032] This utility model provides a rapid COD detection device for industrial wastewater. The specific working principle is as follows: The device can be carried to a wastewater treatment plant. The filter screen 333 can quickly remove suspended solids from the injected wastewater. A micro-pump 342 controls the flow rate, causing the wastewater to flow slowly within the spiral quartz tube 341. An ultraviolet LED lamp 344 irradiates the surface of the spiral quartz tube 341, exciting the nano-titanium dioxide coating to generate strong oxidizing free radicals. These free radicals penetrate the tube wall and directly decompose organic matter in the water phase. A three-electrode structure 35 in the lower detection chamber applies voltage to detect the peak oxidation current. The detection signal is transmitted to the control module 2 and displayed on the screen. After detection, the valve on the drain pipe 36 can be opened to discharge the wastewater. To clean the filter screen 333, the upright plates 336 at both ends can be pressed, compressing the spring 337 between them. This causes the insert plate 338 to disengage from the limiting groove 3321, and the filter screen 333 can be removed by pulling it upwards.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid COD detection device for industrial wastewater, comprising a portable detection box (1), characterized in that: The portable testing box (1) is equipped with a control module (2) at one end and a reaction chamber (4) at the other end. A wastewater COD detection structure (3) is installed in the reaction chamber (4). The reaction chamber (4) is fixedly connected to the upper and lower inner walls by a partition (32). The partition (32) divides the reaction chamber (4) into an upper liquid storage chamber, a middle digestion chamber and a lower detection chamber. The upper liquid storage chamber is equipped with a sample injection assembly (33) on its inner wall, and the middle digestion chamber is equipped with a digestion reaction assembly (34). The sample injection assembly (33) includes a frame-shaped support plate (331) and a filter plate (333). The frame-shaped support plate (331) is fixedly connected to the upper inner wall of the upper liquid storage chamber. Positioning rods (332) are fixedly connected to the four corners of the frame-shaped support plate (331). Limit grooves (3321) are opened at both ends of the positioning rods (332). Positioning holes (334) are opened at the four corners of the filter plate (333). The positioning holes (334) are connected to the filter plate (333). The positioning rods (332) are all inserted. T-shaped guide grooves (335) are opened in the middle of both ends of the filter screen (333). Vertical plates (336) are slidably connected in both ends of the T-shaped guide grooves (335). Springs (337) are provided between the two vertical plates (336). Insert plates (338) are fixedly connected to the outer surface of the vertical plate (336) near the positioning hole (334). The insert plates (338) are inserted into the limiting groove (3321). The digestion reaction assembly (34) includes a spiral quartz tube (341). The spiral quartz tube (341) is fixed between two upper and lower partitions (32) by a fixing plate. An annular plate (343) is provided on the outer side of the spiral quartz tube (341). Ultraviolet LED lamps (344) are arranged on the inner wall of the annular plate (343). The ultraviolet LED lamps (344) are designed to correspond to each turn of the spiral quartz tube (341).

2. The rapid COD detection device for industrial wastewater according to claim 1, characterized in that: The upper end of the reaction chamber (4) is provided with a lid (31) via a hinge.

3. The rapid COD detection device for industrial wastewater according to claim 1, characterized in that: The inlet end of the spiral quartz tube (341) passes through the upper partition (32) and is equipped with a micro pump body (342). The micro pump body (342) is installed in the upper liquid storage chamber. The outlet end of the spiral quartz tube (341) passes through the lower partition (32) and can communicate with the lower detection chamber.

4. The rapid COD detection device for industrial wastewater according to claim 1, characterized in that: A three-electrode structure (35) is installed in the lower detection cavity, and the three-electrode structure (35) is connected to the control module (2).

5. The rapid COD detection device for industrial wastewater according to claim 1, characterized in that: The lower detection chamber is provided with a drain pipe (36) on the side away from the control module (2), and a valve is provided on the drain pipe (36).

6. The rapid COD detection device for industrial wastewater according to claim 1, characterized in that: The outer surface of the spiral quartz tube (341) is uniformly coated with a nano-titanium dioxide coating.

7. The rapid COD detection device for industrial wastewater according to claim 1, characterized in that: The control module (2) automatically controls the digestion time, temperature and detection voltage scanning operation through a microcontroller.

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