Device for detecting COD (Chemical Oxygen Demand) in chemical industrial wastewater

Abstract

The utility model discloses a chemical industry production wastewater COD (chemical oxygen demand) detection device, and particularly relates to the technical field of chemical industry wastewater detection, the chemical industry production wastewater COD detection device comprises a box body, a partition plate is arranged in the box body, a COD detector is mounted at the bottom of an inner cavity of the box body, a sampling structure is arranged at the top of the box body, the sampling structure comprises a water pump, and the water pump is fixedly mounted at the top of the box body. A round filter screen is arranged at the bottom end of the water inlet pipe, the middle of the water inlet pipe is communicated with a spring telescopic pipe, one end of the water outlet pipe is communicated with a hose, the bottom end of the hose is communicated with a sampling head, and an anti-overflow cover is fixedly mounted outside the hose. According to the chemical waste liquid sampling device, chemical waste liquid at different depths can be sampled and stored, the waste liquid at different depths can be conveniently detected, and in the sampling process, the phenomenon of pollution caused by splashing of the waste liquid in the sampling test tube can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of chemical wastewater detection technology, and more specifically, to a COD detection device for chemical production wastewater. Background Technology

[0002] Chemical production wastewater refers to wastewater generated during chemical production processes. It mainly includes process wastewater, cooling water, exhaust gas scrubbing water, and equipment and site flushing water. Chemical production wastewater needs to undergo COD testing. COD testing is a chemical determination method. Chemical oxygen demand refers to the amount of oxygen consumed when reducing substances in water undergo an oxidation-reduction reaction under the action of a strong oxidant.

[0003] Existing methods for detecting COD concentration in wastewater typically involve using a COD analyzer. Before testing, samples need to be taken from the wastewater. However, due to the large amount of impurities and debris in the wastewater, the extraction process can easily clog the extraction pipe, affecting the extraction effect. Furthermore, it is inconvenient to extract wastewater from different depths during sampling.

[0004] A search revealed that Chinese patent CN219777207U discloses a wastewater COD concentration detection device. This structure effectively filters impurities and debris during wastewater extraction. Simultaneously, it scrapes and removes impurities and debris adsorbed on the circular filter screen, reducing the occurrence of sampling pipe blockage, facilitating wastewater sampling at different depths, and improving the accuracy of wastewater COD concentration detection.

[0005] However, in actual use, when the structure transports wastewater of different depths to the interior of multiple sampling tubes through the outlet pipe, the different heights of the sampling tubes and the gap between the outlet pipe and the sampling tubes can easily cause wastewater to splash out when transporting wastewater into the sampling tubes, thus causing pollution. In view of this, this utility model proposes a COD detection device for chemical production wastewater. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, this utility model provides a COD detection device for chemical production wastewater to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a COD detection device for chemical production wastewater, comprising a housing, wherein a partition is provided inside the housing, and a COD detector is installed at the bottom of the inner cavity of the housing.

[0008] To avoid wastewater splashing and contamination caused by gaps between the sampling head and sampling tubes of different heights, preferably, a sampling structure is provided on the top of the box. The sampling structure includes a water pump, which is fixedly installed on the top of the box. The water pump has an inlet pipe and an outlet pipe at its input and output ends, respectively. A circular filter screen is provided at the bottom of the inlet pipe, and a spring telescopic tube is connected to the middle of the inlet pipe. A flexible hose is connected to one end of the outlet pipe, and a sampling head is connected to the bottom of the flexible hose. An overflow cover is fixedly installed on the outside of the flexible hose, and connecting plates are fixedly installed at both ends of the overflow cover. Two electric push rods are provided on the top of the box. The input and output ends of the water pump are connected to the inlet pipe and the outlet pipe, respectively. One end of the inlet pipe extends to the bottom of the L-shaped base and is fixedly connected to the L-shaped base. One end of the outlet pipe extends into the interior of the box. Both electric push rods are fixedly installed on the top of the box, and the output ends of the electric push rods are fixedly connected to the connecting plates.

[0009] To facilitate sampling of chemical wastewater at different depths, preferably, the outer wall of the tank is provided with a guide groove, a lead screw is rotatably installed inside the guide groove, a threaded block is provided outside the lead screw, an L-shaped seat is provided at one end of the threaded block, a first motor is provided at the top of the lead screw, the first motor is fixedly installed on the top of the tank, and the output of the first motor is fixedly connected to the lead screw, the threaded block is threadedly connected to the outside of the lead screw, and the threaded block is fixedly connected to the L-shaped seat.

[0010] To facilitate the separate storage of wastewater collected at different depths, preferably, a support plate is fixedly installed on the partition, a rotating disk is provided on the top of the support plate, a bearing is provided between the support plate and the rotating disk, the bottom end of the bearing is rotatably connected to the surface of the support plate, and the top end of the bearing is fixedly connected to the rotating disk, multiple test tube slots are circularly opened on the rotating disk, and sampling test tubes are inserted into the interior of each test tube slot, a gear ring is fixedly installed on the outside of the bearing, a gear is meshed on one side of the gear, a second motor is provided at the bottom of the gear, the second motor is fixedly installed on the surface of the support plate, and the output end of the second motor is fixedly connected to the gear.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. By setting up a sampling structure, the water pump filters the wastewater through a circular filter screen and then delivers it to the hose through the inlet and outlet pipes. According to the height of the sampling tube, two electric push rods drive the corresponding connecting plates to extend downwards, causing the overflow cover to cover the top of the sampling tube. At this time, the sampling head at one end of the hose is inside the sampling tube, thus ensuring that when the wastewater is delivered to the inside of the sampling tube, a certain gap is avoided between the sampling head and the sampling tube due to different heights, which could lead to waste liquid splashing out and causing pollution.

[0013] 2. The first motor drives the lead screw to rotate, which causes the threaded block to move the L-shaped seat up and down. The L-shaped seat causes the water inlet pipe and the circular filter screen at its bottom to extend into the wastewater at different depths, and causes the spring telescopic tube to extend and retract, thereby sampling the chemical wastewater at different depths.

[0014] 3. The second motor drives the gear to rotate, which causes the gear ring to rotate the bottom end of the shaft seat on the support plate. The top end of the shaft seat drives the rotating plate to rotate, and then the rotating plate rotates multiple sampling tubes for holding waste liquid at different depths to the bottom of the sampling head in sequence, so as to store and test the wastewater at different depths. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the connection structure between the overflow cover and the hose of this utility model.

[0017] Figure 3 This is a schematic diagram of the connection structure between the rotating disk and the support disk of this utility model.

[0018] Figure 4 This is a schematic diagram of the surface structure of the support plate of this utility model.

[0019] Figure 5 This is a schematic diagram of the connection structure between the threaded block and the lead screw of this utility model.

[0020] The attached diagram is labeled as follows: 1. Box body; 2. Partition plate; 3. COD detector; 4. Water pump; 5. Inlet pipe; 6. Outlet pipe; 7. Circular filter screen; 8. Spring telescopic tube; 9. Flexible hose; 10. Sampling head; 11. Overflow cover; 12. Connecting plate; 13. Electric push rod; 14. Guide groove; 15. Lead screw; 16. Threaded block; 17. L-shaped seat; 18. First motor; 19. Support plate; 20. Rotary plate; 21. Shaft seat; 22. Sampling tube; 23. Gear ring; 24. Gear; 25. Second motor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] As attached Figure 1-5The COD detection device for chemical production wastewater shown includes a housing 1, with a partition 2 inside the housing 1, and a COD detector 3 installed at the bottom of the inner cavity of the housing 1.

[0023] In a specific embodiment, as shown in the appendix Figure 1 , 2 As shown, a sampling structure is provided on the top of the housing 1. The sampling structure includes a water pump 4, which is fixedly installed on the top of the housing 1. The water pump 4 has an inlet pipe 5 and an outlet pipe 6 at its input and output ends, respectively. A circular filter screen 7 is installed at the bottom of the inlet pipe 5, and a spring telescopic tube 8 is connected to the middle of the inlet pipe 5. A flexible hose 9 is connected to one end of the outlet pipe 6, and a sampling head 10 is connected to the bottom of the flexible hose 9. An overflow cover 11 is fixedly installed on the outside of the flexible hose 9. Both ends are fixedly equipped with connecting plates 12. The top of the housing 1 is equipped with two electric push rods 13. The input end and output end of the water pump 4 are connected to the inlet pipe 5 and the outlet pipe 6 respectively. One end of the inlet pipe 5 extends to the bottom of the L-shaped seat 17 and is fixedly connected to the L-shaped seat 17. One end of the outlet pipe 6 extends into the interior of the housing 1. Both electric push rods 13 are fixedly installed on the top of the housing 1. The output end of the electric push rod 13 is fixedly connected to the connecting plate 12.

[0024] Specifically, in this structure, when sampling chemical production wastewater, the inlet pipe 5 is extended into the chemical wastewater, and the water pump 4 is started, so that the wastewater is filtered through the circular filter screen 7 and then transported to the hose 9 through the inlet pipe 5 and the outlet pipe 6. According to the height position of the sampling tube 22, the two electric push rods 13 drive the corresponding connecting plate 12 to extend downward, causing the anti-overflow cover 11 to cover the top of the sampling tube 22. At this time, the sampling head 10 at one end of the hose 9 is inside the sampling tube 22, thus ensuring that when the wastewater is transported to the inside of the sampling tube 22, a certain gap is avoided between the sampling head 10 and the sampling tube 22 due to the different height of the sampling tube 22, which would cause the waste liquid to splash out and cause pollution.

[0025] In a specific embodiment, as shown in the appendix Figure 1 , 5 As shown, a guide groove 14 is provided on the outer wall of the housing 1. A lead screw 15 is rotatably installed inside the guide groove 14. A threaded block 16 is provided on the outside of the lead screw 15. An L-shaped seat 17 is provided at one end of the threaded block 16. A first motor 18 is provided at the top of the lead screw 15. The first motor 18 is fixedly installed on the top of the housing 1, and the output of the first motor 18 is fixedly connected to the lead screw 15. The threaded block 16 is threadedly connected to the outside of the lead screw 15, and the threaded block 16 is fixedly connected to the L-shaped seat 17.

[0026] Specifically, in this structure, the first motor 18 drives the lead screw 15 inside the guide groove 14 to rotate, causing the threaded block 16 to lift and lower. During the lifting and lowering process inside the guide groove 14, the threaded block 16 will drive the L-shaped seat 17 to lift and lower. Since the water inlet pipe 5 is fixedly connected to the L-shaped seat 17, and the middle of the water inlet pipe 5 is connected to the spring telescopic tube 8, the L-shaped seat 17 can drive the water inlet pipe 5 to extend into wastewater at different depths, which is convenient for sampling chemical wastewater at different depths.

[0027] In a specific embodiment, as shown in the appendix Figure 1 , 3 As shown in Figure 4, a support plate 19 is fixedly installed on the partition plate 2. A rotating disk 20 is provided on the top of the support plate 19. A bearing seat 21 is provided between the support plate 19 and the rotating disk 20. The bottom end of the bearing seat 21 is rotatably connected to the surface of the support plate 19, and the top end of the bearing seat 21 is fixedly connected to the rotating disk 20. Multiple test tube slots are provided in a ring on the rotating disk 20. Sampling test tubes 22 are inserted into the interior of each test tube slot. A gear ring 23 is fixedly installed on the outside of the bearing seat 21. A gear 24 meshes on one side of the gear ring 23. A second motor 25 is provided at the bottom of the gear 24. The second motor 25 is fixedly installed on the surface of the support plate 19, and the output end of the second motor 25 is fixedly connected to the gear 24.

[0028] Specifically, in this structure, since the inlet pipe 5 can sample chemical wastewater at different depths, multiple sampling tubes 22 on the turntable are used to store chemical wastewater at different depths. In specific operation, the second motor 25 drives the gear 24 to rotate, causing the gear ring 23 to drive the bottom end of the shaft seat 21 to rotate on the support plate 19, and the top end of the shaft seat 21 drives the rotating plate 20 to rotate. Thus, according to the different depths of wastewater sampled by the inlet pipe 5, the multiple sampling tubes 22 are rotated sequentially to the bottom of the sampling head 10 through the rotating plate 20 to store wastewater at different depths, thereby facilitating subsequent testing operations.

[0029] Working principle of this utility model:

[0030] This application provides a COD detection device for chemical production wastewater. In specific operation, the device is first placed near the chemical production wastewater. According to the depth of the wastewater to be sampled, the first motor 18 drives the lead screw 15 to rotate, so that the threaded block 16 drives the L-shaped seat 17 to move up and down. The L-shaped seat 17 drives the inlet pipe 5 and the circular filter screen 7 at its bottom end to extend into the wastewater at different depths, and causes the spring telescopic tube 8 to extend and retract, thereby sampling the chemical wastewater at different depths.

[0031] During sampling, the water pump 4 filters the wastewater through the circular filter screen 7 and then delivers it to the hose 9 via the inlet pipe 5 and the outlet pipe 6. Depending on the height of the sampling tube 22, the two electric push rods 13 drive the corresponding connecting plate 12 to extend downward, causing the anti-overflow cover 11 to cover the top of the sampling tube 22. At this time, the sampling head 10 at one end of the hose 9 is inside the sampling tube 22, thus ensuring that when the wastewater is delivered to the inside of the sampling tube 22, a certain gap is avoided between the sampling head 10 and the sampling tube 22 due to different heights, which could lead to waste liquid splashing out and causing pollution.

[0032] When wastewater at different depths is stored in different sampling tubes 22, the second motor 25 drives the gear 24 to rotate, which causes the gear ring 23 to drive the bottom of the bearing seat 21 to rotate on the support plate 19, and the top of the bearing seat 21 drives the rotating plate 20 to rotate. Then, the rotating plate 20 rotates multiple sampling tubes 22 to the bottom of the sampling head 10 in sequence to store wastewater at different depths.

[0033] Multiple sampling tubes 22 contain wastewater at different depths, and the wastewater in the sampling tubes 22 is then placed in the COD detector 3 for testing.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A COD detection device for chemical production wastewater, comprising a housing (1), characterized in that: The box (1) is equipped with a partition (2) inside, a COD detector (3) is installed at the bottom of the inner cavity of the box (1), and a sampling structure is provided at the top of the box (1). The sampling structure includes a water pump (4), which is fixedly installed on the top of the housing (1). The water pump (4) has an inlet pipe (5) and an outlet pipe (6) at its input and output ends, respectively. A circular filter screen (7) is provided at the bottom of the inlet pipe (5). A spring telescopic pipe (8) is connected to the middle of the inlet pipe (5). A hose (9) is connected to one end of the outlet pipe (6). A sampling head (10) is connected to the bottom of the hose (9). An overflow cover (11) is fixedly installed on the outside of the hose (9). A connecting plate (12) is fixedly installed at both ends of the overflow cover (11). Two electric push rods (13) are provided on the top of the housing (1).

2. The COD detection device in chemical production wastewater according to claim 1, characterized in that: The outer wall of the housing (1) is provided with a guide groove (14), a lead screw (15) is rotatably arranged inside the guide groove (14), a threaded block (16) is arranged outside the lead screw (15), an L-shaped seat (17) is arranged at one end of the threaded block (16), and a first motor (18) is arranged at the top of the lead screw (15).

3. The COD detection device in chemical production wastewater according to claim 2, characterized in that: The first motor (18) is fixedly installed on the top of the housing (1), and the output of the first motor (18) is fixedly connected to the lead screw (15). The threaded block (16) is threadedly connected to the outside of the lead screw (15), and the threaded block (16) is fixedly connected to the L-shaped seat (17).

4. The COD detection device for chemical production wastewater according to claim 1, characterized in that: The input and output ends of the water pump (4) are connected to the inlet pipe (5) and the outlet pipe (6) respectively. One end of the inlet pipe (5) extends to the bottom of the L-shaped seat (17) and is fixedly connected to the L-shaped seat (17). One end of the outlet pipe (6) extends into the interior of the box (1). Two electric push rods (13) are fixedly installed on the top of the box (1). The output end of the electric push rod (13) is fixedly connected to the connecting plate (12).

5. The COD detection device for chemical production wastewater according to claim 1, characterized in that: A support plate (19) is fixedly installed on the partition plate (2). A rotating disk (20) is provided on the top of the support plate (19). A bearing seat (21) is provided between the support plate (19) and the rotating disk (20). The bottom end of the bearing seat (21) is rotatably connected to the surface of the support plate (19), and the top end of the bearing seat (21) is fixedly connected to the rotating disk (20). Multiple test tube slots are provided in a ring on the rotating disk (20), and sampling test tubes (22) are inserted into the interior of each of the multiple test tube slots.

6. The COD detection device for chemical production wastewater according to claim 5, characterized in that: A gear ring (23) is fixedly installed on the outside of the bearing seat (21). A gear (24) meshes with one side of the gear ring (23). A second motor (25) is provided at the bottom of the gear (24). The second motor (25) is fixedly installed on the surface of the support plate (19), and the output end of the second motor (25) is fixedly connected to the gear (24).

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