Pretreatment device for sewage detection

Abstract

The utility model discloses a pretreatment device for sewage detection, which comprises a bottom plate, a flocculent precipitation tank and a sewage temporary storage tank are sequentially fixed on the upper end face of the bottom plate, a valve is arranged at an outlet at the bottom of the flocculent precipitation tank, the lower end of the valve is communicated with a filter, and the lower end of the filter is communicated with the sewage temporary storage tank. The upper end of the flocculent precipitation tank is communicated with a dosing mechanism, a stirring mechanism is arranged in the flocculent precipitation tank, a sample container is further fixedly arranged on the upper end face of the bottom plate, the sample container is communicated with the sewage temporary storage pool through a liquid pump, and the water inlet end of the liquid pump extends into the sewage temporary storage pool and is fixedly communicated with a water distributor arranged in the vertical direction; by means of the design of the water segregator, the multiple sampling pipelines and the sampling nozzles, sampling and mixing can be conducted at different positions and depths at the same time, and the problem that substances in sewage samples are not evenly distributed is effectively solved; and the detection data is more accurate and reliable.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater testing devices, specifically to a pretreatment device for wastewater testing. Background Technology

[0002] Wastewater pretreatment is a crucial preliminary step in the wastewater testing process. Its main purpose is to remove large particulate matter, suspended solids, and some dissolved substances from the wastewater, enabling the wastewater sample to more accurately reflect its true composition and laying the foundation for subsequent precise testing. The effectiveness of pretreatment directly impacts the reliability and accuracy of the final test data.

[0003] Traditional wastewater pretreatment equipment typically includes flocculation and sedimentation devices, and filtration devices. The flocculation and sedimentation device adds flocculants to the wastewater, causing tiny particles to aggregate into larger flocs, which then settle to the bottom under gravity, thus achieving solid-liquid separation. The filtration device further removes residual suspended solids, making the wastewater clearer. However, traditional pretreatment equipment has certain drawbacks. After flocculation and sedimentation, the internal distribution of substances in the wastewater sample is not uniform. Due to differences in density of different substances and various factors during the sedimentation process, the components in the wastewater exhibit different concentration gradients. Direct sampling makes it difficult to represent the true state of the entire wastewater, resulting in poor data accuracy. This necessitates multiple samplings at different locations and depths to mitigate sample differences caused by uneven material distribution. However, this not only increases the workload and cost but also still fails to fully guarantee the representativeness of the samples and the accuracy of the data. Utility Model Content

[0004] (I) Technical Issues

[0005] The present invention aims to provide a pretreatment device for wastewater testing, so as to solve the problem of inaccurate test data caused by uneven distribution of wastewater sample substances in the traditional wastewater testing pretreatment process.

[0006] (II) Technical Content

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a pretreatment device for wastewater testing, including a base plate, a flocculation sedimentation tank and a wastewater storage tank are fixedly mounted sequentially on the upper surface of the base plate, the bottom outlet of the flocculation sedimentation tank is connected to the wastewater storage tank, a valve is provided at the bottom outlet of the flocculation sedimentation tank, a filter is connected to the lower end of the valve, the lower end of the filter is connected to the wastewater storage tank, a dosing mechanism is connected to the upper end of the flocculation sedimentation tank, a stirring mechanism is provided inside the flocculation sedimentation tank, a sample container is also fixedly mounted on the upper surface of the base plate, the sample container and the wastewater storage tank are connected by a liquid pump, the inlet end of the liquid pump extends into the wastewater storage tank and is fixedly connected to a vertically arranged water distributor, multiple sampling pipes are connected to the side of the water distributor, and several sampling nozzles are provided at the bottom of the sampling pipes.

[0008] Furthermore, the dosing mechanism includes a dosing tank fixedly and connected to the upper end of the flocculation sedimentation tank, and an electromagnetic flow valve is provided at the lower outlet of the dosing tank.

[0009] Furthermore, the stirring mechanism includes a motor fixedly mounted on the upper end of the flocculation sedimentation tank, and a stirring shaft is fixedly mounted on one end of the motor's drive shaft that extends into the interior of the flocculation sedimentation tank. Spiral stirring blades are fixedly mounted on the stirring shaft.

[0010] Furthermore, the flocculation sedimentation tank is provided with a sewage inlet at the upper end and a sediment discharge outlet at the bottom.

[0011] Furthermore, the filter includes a housing that connects the valve and the sewage storage tank, and the housing is provided with multiple layers of filter screens. The filter is detachably connected to the lower end of the valve by threads.

[0012] Furthermore, the sample container is a glass vessel with an opening at the top.

[0013] Furthermore, the bottom of the flocculation sedimentation tank is designed in a funnel shape.

[0014] (III) Technical Effects

[0015] Compared with existing technologies, this invention has the following advantages: During sampling, the design of the water distributor and multiple sampling pipes and nozzles allows for simultaneous sampling and mixing from different depths, effectively solving the problem of uneven material distribution within the wastewater sample. This significantly improves the representativeness of the sample, making the test data more accurate and reliable. The electromagnetic flow valve in the dosing mechanism can precisely control the amount of flocculant added, allowing for flexible adjustments based on the actual wastewater conditions. This ensures effective flocculation and sedimentation while avoiding reagent waste. The filter uses a threaded, detachable connection, facilitating regular disassembly, cleaning, or replacement of the internal filter screen, ensuring the stability of the filtration effect. Attached Figure Description

[0016] Figure 1This is a three-dimensional structural diagram of a pretreatment device for wastewater testing according to the present invention. Figure 1 .

[0017] Figure 2 This is a three-dimensional structural diagram of a pretreatment device for wastewater testing according to the present invention. Figure 2 .

[0018] Figure 3 This is a schematic diagram of the main structure of a pretreatment device for wastewater testing according to this utility model.

[0019] Figure 4 This is a top view schematic diagram of a pretreatment device for wastewater testing according to this utility model.

[0020] Figure 5 This is a cross-sectional structural diagram of a pretreatment device for wastewater testing according to the present invention.

[0021] As shown in the figure: 1. Base plate; 2. Flocculation sedimentation tank; 3. Wastewater temporary storage tank; 4. Valve; 5. Filter; 6. Dosing mechanism; 7. Sample container; 8. Liquid pump; 9. Diverter; 10. Sampling pipe; 11. Sampling nozzle; 12. Dosing tank; 13. Electromagnetic flow valve; 14. Motor; 15. Stirring shaft; 16. Spiral stirring blades; 17. Wastewater inlet; 18. Sediment outlet; 19. Shell; 20. Multi-layer filter screen. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings.

[0025] Combined with appendix Figure 1 To be continued Figure 5A wastewater pretreatment device includes a base plate 1. A flocculation sedimentation tank 2 and a wastewater storage tank 3 are sequentially fixed on the upper surface of the base plate 1. The bottom of the flocculation sedimentation tank 2 is funnel-shaped. The upper end of the flocculation sedimentation tank 2 is provided with a wastewater inlet 17, and the bottom is provided with a sediment discharge outlet 18. The bottom outlet of the flocculation sedimentation tank 2 is connected to the wastewater storage tank 3. A valve 4 is provided at the bottom outlet of the flocculation sedimentation tank 2. A filter 5 is connected to the lower end of the valve 4. The lower end of the filter 5 is connected to the wastewater storage tank 3. The upper end of the flocculation sedimentation tank 2 is connected to a dosing mechanism 6, and the inside of the flocculation sedimentation tank 2 is equipped with a stirring mechanism. The upper surface of the bottom plate 1 is also fixedly equipped with a sample container 7, which is a glass vessel with an open top. The sample container 7 and the sewage temporary storage tank 3 are connected through a liquid pump 8. The inlet end of the liquid pump 8 extends into the sewage temporary storage tank 3 and is fixedly connected to a vertically arranged water distributor 9. Multiple sampling pipes 10 are connected to the side of the water distributor 9, and several sampling nozzles 11 are provided at the bottom of the sampling pipes 10.

[0026] In this embodiment, as a preferred technical solution, the dosing mechanism 6 includes a dosing tank 12 fixedly and connected to the upper end of the flocculation sedimentation tank 2, and an electromagnetic flow valve 13 is provided at the lower outlet of the dosing tank 12.

[0027] In this embodiment, as a preferred technical solution, the stirring mechanism includes a motor 14 fixedly mounted on the upper end of the flocculation sedimentation tank 2, and a stirring shaft 15 is fixedly mounted on one end of the drive shaft of the motor 14 that extends into the interior of the flocculation sedimentation tank 2. A spiral stirring blade 16 is fixedly mounted on the stirring shaft 15.

[0028] In this embodiment, as a preferred technical solution, the filter 5 includes a housing 19 that connects the valve 4 and the sewage storage tank 3. The housing 19 is provided with multiple layers of filter screens 20. The filter 5 is detachably connected to the lower end of the valve 4 by a thread.

[0029] The working principle of this wastewater pretreatment device is as follows: This wastewater pretreatment device is designed based on the principles of flocculation sedimentation, filtration, and uniform sampling. Flocculant is precisely added to the flocculation sedimentation tank 2 via the dosing mechanism 6. The stirring mechanism ensures thorough mixing of the flocculant and wastewater, causing the tiny particles in the wastewater to form flocs and settle. The settled wastewater flows to the filter 5 via the valve 4, where impurities are further removed through the multi-layer filter screen 20 before flowing into the wastewater storage tank 3. During sampling, the liquid pump 8 draws wastewater from the wastewater storage tank 3 through the distributor 9 and the sampling pipe 10. Since the bottom of the sampling pipe 10 is equipped with several sampling nozzles 11, samples can be taken simultaneously from different depths, ensuring that the collected samples more uniformly represent the overall condition of the wastewater and improving detection accuracy.

[0030] The working process of the wastewater pretreatment device for testing according to this utility model is as follows:

[0031] 1. Wastewater enters the flocculation sedimentation tank 2 through the wastewater inlet 17 at the top of the flocculation sedimentation tank 2.

[0032] 2. The dosing mechanism 6 starts working, and the flocculant in the dosing tank 12, which is fixed and connected to the upper end of the flocculation sedimentation tank 2, is added into the flocculation sedimentation tank 2 after the flow rate is precisely controlled by the electromagnetic flow valve 13 at the lower outlet.

[0033] 3. At the same time, the motor 14 fixed at the upper end of the flocculation sedimentation tank 2 starts, and its drive shaft drives the stirring shaft 15 that extends into the flocculation sedimentation tank 2 to rotate. The spiral stirring blades 16 on the stirring shaft 15 fully stir and mix the sewage and flocculant, so that the impurities in the sewage form flocs and settle.

[0034] 4. After flocculation and sedimentation are completed, open valve 4 at the bottom outlet of flocculation sedimentation tank 2. The sewage is filtered through filter 5 connected to the lower end of valve 4. The multi-layer filter screen 20 in filter 5, which connects valve 4 and sewage storage tank 3, removes residual impurities. The filtered sewage flows into sewage storage tank 3.

[0035] 5. When sampling and testing are required, start the liquid pump 8 between the sample container 7 and the sewage storage tank 3. The water inlet of the liquid pump 8 is connected to a vertically arranged water distributor 9 that extends into the sewage storage tank 3 and is fixedly connected to it. Multiple sampling pipes 10 connected to the side of the water distributor 9 and sampling nozzles 11 at the bottom of the sampling pipes 10 are used to extract sewage from different depths and transport it to the sample container 7 for subsequent testing.

[0036] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A pretreatment device for wastewater testing, comprising a base plate (1), wherein a flocculation sedimentation tank (2) and a wastewater storage tank (3) are sequentially fixed on the upper surface of the base plate (1), and the bottom outlet of the flocculation sedimentation tank (2) is connected to the wastewater storage tank (3), characterized in that: The flocculation sedimentation tank (2) is equipped with a valve (4) at the bottom outlet. The lower end of the valve (4) is connected to a filter (5). The lower end of the filter (5) is connected to the sewage storage tank (3). The upper end of the flocculation sedimentation tank (2) is connected to a dosing mechanism (6). The flocculation sedimentation tank (2) is equipped with a stirring mechanism. The upper surface of the bottom plate (1) is also fixedly equipped with a sample container (7). The sample container (7) and the sewage storage tank (3) are connected through a liquid pump (8). The inlet end of the liquid pump (8) extends into the sewage storage tank (3) and is fixedly connected to a vertically arranged water distributor (9). The side of the water distributor (9) is connected to multiple sampling pipes (10). The bottom of the sampling pipes (10) is equipped with several sampling nozzles (11).

2. The wastewater pretreatment device according to claim 1, characterized in that: The dosing mechanism (6) includes a dosing tank (12) fixed and connected to the upper end of the flocculation sedimentation tank (2), and an electromagnetic flow valve (13) is provided at the lower outlet of the dosing tank (12).

3. The wastewater pretreatment device according to claim 1, characterized in that: The stirring mechanism includes a motor (14) fixedly mounted on the upper end of the flocculation sedimentation tank (2). The end of the drive shaft of the motor (14) that extends into the interior of the flocculation sedimentation tank (2) is fixedly provided with a stirring shaft (15), and a spiral stirring blade (16) is fixedly mounted on the stirring shaft (15).

4. The wastewater pretreatment device according to claim 1, characterized in that: The flocculation sedimentation tank (2) is provided with a sewage inlet (17) at the top and a sediment discharge outlet (18) at the bottom.

5. The wastewater pretreatment device according to claim 1, characterized in that: The filter (5) includes a housing (19) that connects the valve (4) and the sewage storage tank (3). The housing (19) is provided with multiple layers of filter screens (20). The filter (5) is detachably connected to the lower end of the valve (4) by threads.

6. The wastewater pretreatment device according to claim 1, characterized in that: The sample container (7) is a glass vessel with an open top.

7. A pretreatment device for wastewater testing according to claim 1, characterized in that: The bottom of the flocculation sedimentation tank (2) is designed in the shape of a funnel.

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