Wastewater COD (Chemical Oxygen Demand) removal equipment

Abstract

The utility model relates to the technical field of sewage treatment, in particular to wastewater COD (Chemical Oxygen Demand) removal equipment which comprises a rack, a discharging unit is arranged in the rack, the discharging unit comprises a retention box, a quantitative extraction assembly is arranged in the retention box, and the quantitative extraction assembly is used for quantitatively extracting wastewater to be detected; wherein the quantitative extraction assembly comprises a sampling barrel, the sampling barrel is detachably connected with the retention box through a fixing structure, the sampling barrel is fixed in the retention box, and shaking during sampling can be reduced by fixing the sampling barrel, so that the sampling accuracy is improved, and the accuracy of the sample size is ensured; the connecting piece and the sampling barrel are connected and fixed in a clamping mode that the positioning part is matched with the stopping part, the connecting piece and the sampling barrel are convenient to disassemble and replace, the situation that the whole sampling barrel needs to be replaced due to damage of one of the connecting piece and the sampling barrel is prevented, and the moving stroke of the piston rod can be limited through the quantitative rod arranged on the connecting piece.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a wastewater COD removal device. Background Technology

[0002] In wastewater treatment, COD is a key monitoring indicator that can be used to assess the effectiveness of wastewater treatment and determine whether the treated wastewater meets discharge standards. The treatment of chemical oxygen demand (COD) in wastewater usually involves a variety of methods, including biological treatment and adsorption treatment, with the aim of reducing the content of organic pollutants in the water.

[0003] Adsorption treatment can improve COD levels in wastewater. For example, a wastewater COD removal device disclosed in Chinese Patent Publication No. CN216336995U includes an outer casing and a sealing plate. The top of the outer casing has a discharge pipe, and the bottom has a discharge port. Inside the outer casing are multiple adsorption columns connected to the discharge pipe. Each adsorption column has an installation groove at its bottom, and a discharge mechanism is installed at the bottom of the column. The discharge mechanism includes adsorption clips that engage with the bottom of the adsorption columns. Each adsorption clip has a leak that mates with the installation groove, and a fine mesh is installed inside the leak. After the adsorption clips are installed, adsorption filler is added. A mounting base plate is located at the bottom of each adsorption clip, and a retention box is located inside the outer casing. The mounting base plate is installed at the bottom of the retention box, and a discharge box with an adsorption mesh is located at the top of the retention box. This invention increases the COD removal efficiency of wastewater by increasing the adsorption resin's pre-adsorption followed by catalytic oxidation.

[0004] In practice, the wastewater after adsorption treatment is retained in the retention box, which is equipped with a detection tube. The wastewater is extracted through the detection tube to detect the COD adsorption treatment. However, the detection tube cannot extract the wastewater quantitatively, and the amount extracted each time is uncertain, which may result in different results each time, making it difficult to compare the results. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies that cannot quantitatively extract wastewater, and to propose a wastewater COD removal device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a wastewater COD removal device, including a frame, with a feeding unit inside the frame, the feeding unit including a retention box, and a quantitative extraction component inside the retention box, the quantitative extraction component being used to quantitatively extract the wastewater to be tested;

[0008] The quantitative extraction component includes a sampling tube, which is detachably connected to the retention box via a fixing structure.

[0009] Furthermore, the fixing structure includes an annular portion, the inner bottom of the retention box has a protrusion, the middle of the protrusion is recessed and communicates with the outer wall to form a water inlet, the sampling tube is inserted into the water inlet, and the annular portion is fixedly connected to the bottom periphery of the sampling tube, the annular portion abutting against the protrusion.

[0010] Furthermore, it also includes a snap-fit ​​portion, wherein at least one pair of snap-fit ​​portions are distributed around the outer circumference of the protrusion, the snap-fit ​​portion having an L-shaped structure and being rotatably connected to the protrusion;

[0011] The annular portion has a protruding structure at its top. The snap-fit ​​portion rotates so that the protruding part at one of its bent ends slides against the protruding structure and snaps into place.

[0012] Furthermore, the quantitative extraction component also includes a connector, which has an arc-shaped structure that fits against the outer wall of the sampling cylinder. The connector has several positioning parts integrally formed on both sides near the sampling cylinder. The positioning parts on both sides cooperate with each other and are engaged with the periphery of the sampling cylinder by abutting deformation.

[0013] Furthermore, a pair of stops are located on the top periphery of the sampling tube, and the connector is placed between the pair of stops and abuts against the upper and lower side stops.

[0014] Furthermore, the connector extends outward from the top of the side away from the sampling cylinder to form an extension, and a metering rod is slidably connected inside the extension. The metering rod is fixed to the extension by a locking member.

[0015] The sampling cylinder is slidably connected to a piston rod, the top of which abuts against the top protrusion of the metering rod.

[0016] The COD removal device for wastewater proposed in this utility model has the following advantages: This utility model uses a pair of snap-fit ​​protrusions to fix the sampling cylinder inside the retention box. Fixing the sampling cylinder reduces shaking during sampling, thereby improving sampling accuracy and ensuring precise sample quantity. Furthermore, the connecting part and the sampling cylinder are connected and fixed by a positioning part and a stop part engaging, facilitating disassembly and replacement and preventing the need for complete replacement due to damage to one component. Additionally, the quantitative rod on the connecting part limits the travel of the piston rod, achieving quantitative sampling and improving the accuracy of comparisons between multiple test data. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the quantitative extraction component and fixing structure of this utility model;

[0019] Figure 3 for Figure 2 A magnified structural diagram of area A;

[0020] Figure 4 This is a schematic diagram of the structure of the connector of this utility model;

[0021] Figure 5 This is a schematic diagram of the metering rod of this utility model.

[0022] In the diagram: 1. Frame; 2. Feeding unit; 21. Retention box; 22. Protrusion; 3. Quantitative extraction component; 31. Sampling cylinder; 32. Connector; 321. Positioning part; 322. Extension part; 33. Stop part; 34. Quantitative rod; 35. Locking part; 36. Piston rod; 4. Fixing structure; 41. Annular part; 42. Snap-fit ​​part; 43. Protrusion structure. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-5 A wastewater COD removal device includes a frame 1, a feeding unit 2 is provided inside the frame 1, the feeding unit 2 includes a retention box 21, and a quantitative extraction component 3 is provided inside the retention box 21. The quantitative extraction component 3 is used to quantitatively extract the wastewater to be tested.

[0025] The quantitative extraction component 3 includes a sampling cylinder 31, which is detachably connected to the retention box 21 via a fixing structure 4.

[0026] In some embodiments, the feeding unit 2 mainly includes multiple adsorption columns. The top of the adsorption column is connected to a feed pipe, and the bottom of the column is connected to an adsorption card column through an installation slot. The adsorption card column is set inside the retention box 21, and adsorption material is also provided inside the adsorption card column.

[0027] Specifically, a filter screen is fixedly connected to the top periphery of the retention box 21. Wastewater enters the adsorption column along the feed pipe, and after being filtered by the adsorption material, it is discharged into the retention box 21. At this time, the wastewater after adsorption can be detected by the quantitative extraction component 3.

[0028] The wastewater treated by the adsorption column overflows from the adsorption net at the top of the retention box 21. After further adsorption by the adsorption net, the wastewater treatment effect is ensured. The COD removal of the wastewater after adsorption and catalytic oxidation is more complete and the effect is better.

[0029] Furthermore, the fixing structure 4 includes an annular portion 41, and the inner bottom of the retention box 21 has a protrusion 22. The middle part of the protrusion 22 is concave and communicates with the outer wall to form a water inlet. The sampling tube 31 is inserted into the water inlet. The annular portion 41 is fixedly connected to the bottom periphery of the sampling tube 31, and the annular portion 41 abuts against the protrusion 22.

[0030] Specifically, a sealing ring can be fixedly connected to the top of the protrusion 22. The sealing ring is placed between the annular part 41 and the protrusion 22 to further improve the sealing performance of the sampling cylinder 31 during sampling.

[0031] Furthermore, it also includes a snap-fit ​​portion 42, at least one pair of snap-fit ​​portions 42 are distributed around the outer circumference of the protrusion 22, the snap-fit ​​portion 42 has an L-shaped structure and is rotatably connected to the protrusion 22;

[0032] The annular portion 41 has a protruding structure 43 at its top. The snap-fit ​​portion 42 rotates so that the protruding part at one of its bent ends contacts and slides against the protruding structure 43 and snaps into place.

[0033] In this embodiment, the snap-fit ​​part 42 is preferably made of a material with deformation capability such as rubber or plastic. When the sampling tube 31 is inserted into the water inlet, the snap-fit ​​part 42 rotates so that the protruding part at one end of its bend contacts and slides against the protruding structure 43 and snaps into place, thereby fixing the sampling tube 31 and the protruding part 22.

[0034] Furthermore, the fixed sampling tube 31 can ensure stability during the sampling process and avoid shaking and unstable sampling.

[0035] More specifically, the quantitative extraction component 3 also includes a connector 32, which has an arc-shaped structure that fits against the outer wall of the sampling cylinder 31. Furthermore, the connector 32 has several positioning parts 321 integrally formed on both sides of the side closest to the sampling cylinder 31. The positioning parts 321 on both sides cooperate with each other and are engaged with the periphery of the sampling cylinder 31 through abutment deformation.

[0036] In general, a pair of stop portions 33 are located on the top periphery of the sampling cylinder 31, and the connector 32 is placed between the pair of stop portions 33 and abuts against the upper and lower side stop portions 33.

[0037] Finally, the top of the connector 32, away from the sampling cylinder 31, extends outward to form an extension 322. A metering rod 34 is slidably connected inside the extension 322. The metering rod 34 is fixed to the extension 322 by a locking member 35.

[0038] The sampling cylinder 31 is slidably connected to a piston rod 36, the top end of which abuts against the top protrusion of the metering rod 34.

[0039] It should be added that the structure between the sampling cylinder 31 and the piston rod 36 can refer to the syringe structure in the prior art;

[0040] In this embodiment, the connector 32 is preferably made of a material with deformation capability such as rubber or plastic. The connector 32 is fixed to the periphery of the sampling cylinder 31 by the positioning parts 321 on both sides. The detachable connection facilitates cleaning and maintenance and reduces replacement costs.

[0041] Specifically, the connector 32 and the two side positioning parts 321 have a circular structure, and there is an opening between the positioning parts 321 on the opposite side. The sampling cylinder 31 slides and engages with the two side positioning parts 321 through the opening.

[0042] Furthermore, the locking member 35 is a locking bolt, and the locking member 35 is threadedly connected to the extension 322. The end of the locking member 35 abuts against the metering rod 34 to fix the height of the metering rod 34.

[0043] Furthermore, a scale is provided on the side of the metering rod 34. The length of the metering rod 34 matches that of the piston rod 36. The metering rod 34 limits the movement of the piston rod 36, thereby achieving the function of quantitative extraction.

[0044] Working method: During operation, the sampling tube 31 is inserted into the water inlet of the protrusion 22. The locking part 42 rotates so that the protruding part at one end of its bend contacts and slides against the protruding structure 43 and locks in place, thereby fixing the sampling tube 31 and the protrusion 22.

[0045] Adsorbent material is placed inside the adsorption column. Wastewater enters the adsorption column through the feeding pipe and is then adsorbed by the adsorbent material before being discharged into the retention box 21. At this point, the wastewater after adsorption can be sampled and tested by the quantitative extraction component 3.

[0046] After unlocking the locking part 35, adjust the height according to the liquid height to be collected and the scale on the side of the metering rod 34. After adjustment, tighten the locking part 35 to fix the metering rod 34. Pull the piston rod 36 to extract the wastewater. When the piston rod 36 touches the end of the metering rod 34, the quantitative extraction is completed.

[0047] Finally, the sampling cylinder 31 can be disassembled by unlocking the locking part 42.

[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A wastewater COD removal device, comprising a frame (1), characterized in that: Inside the frame (1) is a feeding unit (2), which includes a retention box (21). Inside the retention box (21) is a quantitative extraction component (3), which is used to quantitatively extract the wastewater to be tested. The quantitative extraction component (3) includes a sampling tube (31), which is detachably connected to the retention box (21) via a fixing structure (4).

2. The wastewater COD removal equipment according to claim 1, characterized in that: The fixed structure (4) includes an annular part (41), and the inner bottom of the retention box (21) has a protrusion (22). The middle part of the protrusion (22) is recessed and communicates with the outer wall to form a water inlet. The sampling tube (31) is inserted into the water inlet. The annular part (41) is fixedly connected to the bottom periphery of the sampling tube (31), and the annular part (41) abuts against the protrusion (22).

3. The wastewater COD removal equipment according to claim 2, characterized in that: It also includes a snap-fit ​​part (42), and at least one pair of snap-fit ​​parts (42) are distributed around the outer circumference of the protrusion (22). The snap-fit ​​part (42) has an L-shaped structure and is rotatably connected to the protrusion (22). The annular portion (41) has a protruding structure (43) at its top. The snap-fit ​​portion (42) rotates so that the protruding part at one end of its bend contacts and slides against the protruding structure (43) and snaps into place.

4. The wastewater COD removal equipment according to claim 1, characterized in that: The quantitative extraction component (3) also includes a connector (32), which has an arc-shaped structure that fits against the outer wall of the sampling cylinder (31). The connector (32) has several positioning parts (321) integrally formed on both sides near the sampling cylinder (31). The positioning parts (321) on both sides cooperate with each other and are engaged with the periphery of the sampling cylinder (31) by contact deformation.

5. The wastewater COD removal equipment according to claim 4, characterized in that: The sampling tube (31) has a pair of stops (33) on its top periphery, and the connector (32) is placed between the pair of stops (33) and abuts against the upper and lower side stops (33).

6. The wastewater COD removal equipment according to claim 5, characterized in that: The connector (32) extends outward from the top of the side away from the sampling cylinder (31) to form an extension (322). A quantitative rod (34) is slidably connected inside the extension (322). The quantitative rod (34) is fixed to the extension (322) by a locking member (35). The sampling cylinder (31) is slidably connected to a piston rod (36), and the top end of the piston rod (36) abuts against the top protrusion of the metering rod (34).

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