Wastewater treatment equipment with starch content detection function

Abstract

The utility model provides a wastewater treatment equipment with starch content detection function belongs to wastewater treatment technical field especially relates to a wastewater treatment equipment with starch content detection function. The utility model provides a wastewater treatment equipment with starch content detection function. The utility model discloses a sedimentation separation tank 4, its characterized in that the lower part of sedimentation separation tank 4 is provided with horizontal filter screen 3, the upper end of sedimentation separation tank 4 is wastewater inlet, the upper export of the rear side of sedimentation separation tank 4 is connected with the upper import of the front side of photocatalytic tank 6, the upper export of the rear side of photocatalytic tank 6 is connected with the upper import of the front side of electric catalytic tank 8, the upper export of the rear side of electric catalytic tank 8 is connected with the upper import of the front side of fenton oxidation tank 9, and the rear side of fenton oxidation tank 9 is the export; the upper end export of photocatalytic tank 6 is connected with the import of first sampling valve 15, the upper end export of electric catalytic tank 8 is connected with the import of second sampling valve 16, and the upper end export of fenton oxidation tank 9 is connected with the import of third sampling valve 17.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and in particular relates to a wastewater treatment device with starch content detection function. Background Technology

[0002] The production of vermicelli generates a large amount of high-concentration, recalcitrant wastewater containing abundant starch and other organic pollutants. Existing wastewater treatment equipment faces numerous challenges in treating this type of wastewater, such as low treatment efficiency, high cost, and low resource recovery rate. While existing strong oxidation tanks can degrade organic pollutants to some extent, they lack real-time monitoring capabilities for the starch content, a key component in the wastewater. This makes it difficult to accurately set treatment parameters based on specific starch content, and thus fails to simultaneously meet the requirements of high-efficiency treatment and energy saving. Utility Model Content

[0003] This invention addresses the aforementioned problems by providing a wastewater treatment device with a starch content detection function.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: the present invention includes a sedimentation separation tank 4, characterized in that a transverse filter screen 3 is provided in the lower part of the sedimentation separation tank 4, the upper end of the sedimentation separation tank 4 is a wastewater inlet, the upper rear outlet of the sedimentation separation tank 4 is connected to the upper front inlet of the photocatalytic tank 6, the upper rear outlet of the photocatalytic tank 6 is connected to the upper front inlet of the electrocatalytic tank 8, the upper rear outlet of the electrocatalytic tank 8 is connected to the upper front inlet of the Fenton oxidation tank 9, and the upper rear part of the Fenton oxidation tank 9 is an outlet;

[0005] The upper outlet of the photocatalytic cell 6 is connected to the inlet of the first sampling valve 15, the upper outlet of the electrocatalytic cell 8 is connected to the inlet of the second sampling valve 16, the upper outlet of the Fenton oxidation cell 9 is connected to the inlet of the third sampling valve 17, the outlets of the first sampling valve 15, the second sampling valve 16, and the third sampling valve 17 are connected to the inlet of the water pump 19, and the outlet of the water pump 19 is connected to the inlet of the wastewater storage chamber 20.

[0006] The photometric detector probe 23 and the lower end of the reagent inlet tube are placed inside the wastewater storage chamber 20. The upper end of the photometric detector probe 23 is connected to the photometric detector body 22 outside the wastewater storage chamber 20. The upper end of the reagent inlet tube is connected to the outlet of the potassium iodide reagent storage tank 21 outside the wastewater storage chamber 20. A reagent output control valve is provided at the outlet of the potassium iodide reagent storage tank 21.

[0007] As a preferred embodiment, the present invention provides a first flow regulating valve 2 at the upper rear outlet of the sedimentation separation tank 4, a second flow regulating valve 13 at the upper rear outlet of the photocatalytic tank 6, a third flow regulating valve 10 at the upper rear outlet of the electrocatalytic tank 8, and a fourth flow regulating valve 12 at the upper rear outlet of the Fenton oxidation tank 9.

[0008] As another preferred embodiment, the lower end of a vertical pipe passes through the horizontal filter screen 3 and is placed in the sedimentation separation tank 4 below the horizontal filter screen 3. The upper end of the vertical pipe is connected to the inlet of the water pump 1. The water pump 1 is set at the upper end of the sedimentation separation tank 4, and the outlet of the water pump 1 is connected to the inlet of the first flow regulating valve 2.

[0009] As another preferred embodiment, the photocatalytic cell 6 of this invention is provided with a visible light tube 5.

[0010] As another preferred embodiment, the upper end of the Fenton oxidation tank 9 of this utility model is provided with a ferrous sulfate solution storage tank 11 and a hydrogen peroxide solution storage tank 24. The outlets of the ferrous sulfate solution storage tank 11 and the hydrogen peroxide solution storage tank 24 are connected to the inlet on the Fenton oxidation tank 9, and valves are provided at the outlets of the ferrous sulfate solution storage tank 11 and the hydrogen peroxide solution storage tank 24.

[0011] As another preferred embodiment, the electrocatalytic cell 8 of this invention is provided with an electrode plate 7.

[0012] As another preferred embodiment, the filter 3 of this invention adopts a three-layer gradient composite filter.

[0013] As another preferred embodiment, the ferrous sulfate solution storage tank 11 and the hydrogen peroxide solution storage tank 24 of this invention are made of stainless steel.

[0014] Secondly, the electrode plate 7 described in this utility model is a titanium-based coated electrode plate.

[0015] In addition, the reagent output control valve described in this utility model is a quantitative valve.

[0016] The beneficial effects of this utility model.

[0017] This invention utilizes a first sampling valve 15, a second sampling valve 16, a third sampling valve 17, and a water pump 19 to extract wastewater from the photocatalytic tank 6, the electrocatalytic tank 8, and the Fenton oxidation tank 9 in real time. A potassium iodide reagent storage tank 21 and a photometric detector probe 23 can monitor the starch content in the wastewater in real time. This allows operators to adjust wastewater treatment parameters promptly based on the starch content readings, avoiding overtreatment (e.g., setting excessively high treatment parameters when the starch content is low, resulting in excessive energy or reagent consumption) while ensuring efficient treatment (by setting appropriate treatment parameters based on the starch content readings).

[0018] This invention treats wastewater sequentially through a photocatalytic tank 6, an electrocatalytic tank 8, and a Fenton oxidation tank 9, which can fully treat the wastewater and achieve good wastewater treatment results. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] In the diagram, 1 is a water pump, 2 is the first flow regulating valve, 3 is a transverse filter, 4 is a sedimentation separation tank, 5 is a visible light tube, 6 is a photocatalytic tank, 7 is an electrode plate, 8 is an electrocatalytic tank, 9 is a Fenton oxidation tank, 10 is the third flow regulating valve, 11 is a ferrous sulfate solution storage tank, 12 is the fourth flow regulating valve, 13 is the second flow regulating valve, 14 is the first power supply control section, 15 is the first sampling valve, 16 is the second sampling valve, 17 is the third sampling valve, 18 is the second power supply control section, 19 is a water pump, 20 is a wastewater storage tank, 21 is a potassium iodide reagent storage tank, 22 is the main body of the photometric detector, 23 is the photometric detector probe, and 24 is a hydrogen peroxide solution storage tank. Detailed Implementation

[0022] like Figure 1 As shown, this utility model includes a sedimentation separation tank 4, a horizontal filter screen 3 is provided in the lower part of the sedimentation separation tank 4, the upper end of the sedimentation separation tank 4 is a wastewater inlet, the upper rear outlet of the sedimentation separation tank 4 is connected to the upper front inlet of the photocatalytic tank 6, the upper rear outlet of the photocatalytic tank 6 is connected to the upper front inlet of the electrocatalytic tank 8, the upper rear outlet of the electrocatalytic tank 8 is connected to the upper front inlet of the Fenton oxidation tank 9, and the upper rear part of the Fenton oxidation tank 9 is the outlet.

[0023] The upper outlet of the photocatalytic cell 6 is connected to the inlet of the first sampling valve 15, the upper outlet of the electrocatalytic cell 8 is connected to the inlet of the second sampling valve 16, the upper outlet of the Fenton oxidation cell 9 is connected to the inlet of the third sampling valve 17, the outlets of the first sampling valve 15, the second sampling valve 16, and the third sampling valve 17 are connected to the inlet of the water pump 19, and the outlet of the water pump 19 is connected to the inlet of the wastewater storage chamber 20.

[0024] By controlling the water pump 19, and in conjunction with controlling the first sampling valve 15, the second sampling valve 16, the third sampling valve 17, and other valves at the inlet and outlet, the wastewater from the photocatalytic tank 6, the electrocatalytic tank 8, and the Fenton oxidation tank 9 can be introduced into the wastewater storage chamber 20 for testing.

[0025] The photometric detector probe 23 and the lower end of the reagent inlet tube are placed inside the wastewater storage chamber 20. The upper end of the photometric detector probe 23 is connected to the photometric detector body 22 outside the wastewater storage chamber 20. The upper end of the reagent inlet tube is connected to the outlet of the potassium iodide reagent storage tank 21 outside the wastewater storage chamber 20.

[0026] Potassium iodide reagent can be accurately injected into the extracted wastewater through a precise metering valve. The photometric detector probe 23 detects changes in visible light intensity in the injected wastewater; the display on the photometric detector body 22 visually displays the detected starch content data, providing operators with real-time information for timely adjustments to process parameters. After testing, the outlet of the wastewater storage chamber 20 is opened to discharge the wastewater for the next round of testing.

[0027] The filter 3 can adopt Zhejiang Zhaohui Filtration Technology. PP-5C series, model: PP-5C-100, three-layer gradient composite filter.

[0028] A first flow regulating valve 2 is provided at the upper rear outlet of the precipitation separation tank 4, a second flow regulating valve 13 is provided at the upper rear outlet of the photocatalytic tank 6, a third flow regulating valve 10 is provided at the upper rear outlet of the electrocatalytic tank 8, and a fourth flow regulating valve 12 is provided at the upper rear outlet of the Fenton oxidation tank 9.

[0029] The upper end of the Fenton oxidation tank 9 is provided with a ferrous sulfate solution storage tank 11 and a hydrogen peroxide solution storage tank 24. The outlets of the ferrous sulfate solution storage tank 11 and the hydrogen peroxide solution storage tank 24 are connected to the inlet of the Fenton oxidation tank 9. Valves (which can be electrically controlled valves and controlled by a controller) are provided at the outlets of the ferrous sulfate solution storage tank 11 and the hydrogen peroxide solution storage tank 24.

[0030] The ferrous sulfate solution storage tank 11 and the hydrogen peroxide solution storage tank 24 are fixed to the upper end of the Fenton oxidation tank 9 by a bracket.

[0031] The ferrous sulfate solution storage tank 11 and the hydrogen peroxide solution storage tank 24 are made of stainless steel tanks.

[0032] An electrode plate 7 is arranged in the electrocatalytic cell 8.

[0033] The electrode plate 7 is a titanium-based coated electrode plate.

[0034] The first power supply control part 14 controls the water pump 1, the visible light tube 5, the output of the ferrous sulfate solution storage tank 11, the output of the hydrogen peroxide solution storage tank 24, the electrode plate 7, and the fourth flow regulating valve 12.

[0035] The second power supply control part 18 controls the first sampling valve 15, the second sampling valve 16, the third sampling valve 17, the water pump 19, the output of the potassium iodide reagent storage tank 21, and the power supply of the photometric detector main body 22.

[0036] The working process of the present utility model will be described below in conjunction with the drawings.

[0037] The wastewater enters the precipitation separation tank 4 from the wastewater inlet at the upper end of the precipitation separation tank 4, passes through the horizontal filter screen 3 and then enters the lower part of the precipitation separation tank 4. The precipitation separation tank 4 preliminarily precipitates the impurities in the wastewater. The impurities are blocked by the horizontal filter screen 3 and are intercepted at the upper end of the horizontal filter screen 3. The wastewater entering the lower part of the precipitation separation tank 4 is the wastewater from which impurities have been removed.

[0038] The lower end of a vertical pipe passes through the horizontal filter screen 3 and is placed in the precipitation separation tank 4 below the horizontal filter screen 3. The upper end of the vertical pipe is connected to the inlet of the water pump 1. The water pump 1 is arranged at the upper end of the precipitation separation tank 4, and the outlet of the water pump 1 is connected to the inlet of the first flow regulating valve 2. The wastewater in the lower part of the precipitation separation tank 4 is pumped into the photocatalytic tank 6 by the water pump 1.

[0039] The wastewater enters the photocatalytic tank 6 for photocatalysis of the wastewater. The photocatalytic equipment supporting the visible light tube 5 is an existing product. For details, please refer to the literature "Li Dandan, Liu Zhongqing, Yan Xin, etc. Photocatalytic oxidation of ammonia nitrogen wastewater by TiO2 nanotube arrays. Acta Inorganica Chimica Sinica, 2011, 27(07): 1358-1362". Under the illumination condition, electron-hole pairs are generated and react with water molecules to produce strongly oxidizing hydroxyl radicals (·OH) and superoxide anions (·O2-), which can degrade the organic pollutants in the wastewater and convert them into carbon dioxide (CO2), water (H2O) and other harmless small molecules, thus achieving harmless treatment of sewage.

[0040] The photocatalyzed wastewater enters the electrocatalytic cell 8, where the electrode plates 7 perform electrocatalysis. Electrocatalysis utilizes an external electric field to drive the pollutants in the wastewater to undergo oxidation-reduction reactions on the electrode surface, thereby reducing the ammonia nitrogen content in the wastewater.

[0041] The wastewater, after electrocatalysis, enters the Fenton oxidation tank 9. Ferrous sulfate solution is discharged from ferrous sulfate solution storage tank 11, and hydrogen peroxide solution is discharged from hydrogen peroxide solution storage tank 24, which are used to oxidize the wastewater using Fenton oxidation. Under strongly acidic conditions (pH approximately 2-3), the Fenton oxidation method utilizes Fe2+ ions to catalyze the generation of highly oxidizing hydroxyl radicals (·OH) from hydrogen peroxide (H2O2), thereby degrading organic pollutants in the wastewater.

[0042] The wastewater after Fenton oxidation is discharged from the outlet at the upper rear side of Fenton oxidation tank 9 for further treatment.

[0043] By controlling the opening and closing of the first sampling valve 15, the second sampling valve 16, and the third sampling valve 17, the water pump 19 can extract wastewater from the photocatalytic tank 6, the electrocatalytic tank 8, and the Fenton oxidation tank 9, respectively.

[0044] A metering valve injects potassium iodide reagent from storage tank 21 into the extracted wastewater. The potassium iodide reacts with the starch in the wastewater to form a specific complex, thereby altering the optical properties of the wastewater. The wastewater containing the complex flows through photometric detector probe 23, which detects changes in visible light intensity. Starch content data is calculated from the visible light intensity (calculating starch content from visible light intensity is existing technology) and displayed on a monitor. Based on the displayed starch content, operators can assess the starch degradation status in the wastewater at the current treatment stage and adjust parameters for each tank accordingly, such as the current intensity of the electrocatalytic cell, the reagent addition amount in the Fenton oxidation cell, and the illumination time and intensity in the photocatalytic cell. This ensures the wastewater treatment process operates efficiently until discharge standards are met.

[0045] Stage 6 of the photocatalytic cell: Wastewater enters the sedimentation and separation tank 4 from the upper inlet and flows into the photocatalytic cell 6. The second sampling valve 16 and the third sampling valve 17 are closed, and the first sampling valve 15 is opened. Pump 19 draws the effluent from the photocatalytic cell 6 to the wastewater storage tank 20. Potassium iodide reagent is quantitatively injected, and the photometric detector 22 analyzes the starch concentration in real time. If the starch concentration is >150 mg / L, the parameters of the photocatalytic cell 6 (such as ultraviolet light intensity, TiO2 catalyst loading, and residence time) can be adjusted via PLC. The first flow regulating valve 2 adjusts the influent flow rate of the photocatalytic cell 6 (reducing the flow rate to extend the treatment time). After reaching the standard, the wastewater enters the electrocatalytic cell 8.

[0046] Stage 8 of the electrocatalytic oxidation tank: Close the first sampling valve 15 and the third sampling valve 17, and open the second sampling valve 16; pump 19 draws water from the electrocatalytic oxidation tank 8 for testing. If the starch concentration is greater than the threshold, the parameters of the electrocatalytic oxidation tank 8 (current intensity 0-50A, electrode plate spacing, pulse frequency) can be adjusted via PLC. The second flow regulating valve 13 controls the flow rate from the electrocatalytic oxidation tank 8 to the Fenton oxidation tank 9. After meeting the standards, the wastewater enters the Fenton oxidation tank 9.

[0047] Fenton oxidation tank stage 9: Close the first sampling valve 15 and the second sampling valve 16, and open the third sampling valve 17; pump 19 extracts the effluent from Fenton tank 9 for testing. If the starch concentration > threshold: the amount of Fenton reagent (ferrous sulfate, hydrogen peroxide) added can be adjusted via PLC (the amount added is controlled by controlling the valves at the outlets of the ferrous sulfate solution storage tank 11 and the hydrogen peroxide solution storage tank 24). The third flow regulating valve 10 adjusts the effluent rate from the Fenton tank to ensure sufficient reaction. Finally, the qualified wastewater is discharged from the right side of the Fenton tank.

[0048] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A wastewater treatment device with starch content detection function, comprising a sedimentation separation tank (4), characterized in that... A horizontal filter screen (3) is installed in the lower part of the sedimentation separation tank (4). The upper end of the sedimentation separation tank (4) is the wastewater inlet. The upper rear outlet of the sedimentation separation tank (4) is connected to the upper front inlet of the photocatalytic tank (6). The upper rear outlet of the photocatalytic tank (6) is connected to the upper front inlet of the electrocatalytic tank (8). The upper rear outlet of the electrocatalytic tank (8) is connected to the upper front inlet of the Fenton oxidation tank (9). The upper rear part of the Fenton oxidation tank (9) is the outlet. The upper outlet of the photocatalytic cell (6) is connected to the inlet of the first sampling valve (15), the upper outlet of the electrocatalytic cell (8) is connected to the inlet of the second sampling valve (16), the upper outlet of the Fenton oxidation cell (9) is connected to the inlet of the third sampling valve (17), the outlet of the first sampling valve (15), the outlet of the second sampling valve (16), and the outlet of the third sampling valve (17) are connected to the inlet of the water pump (19), and the outlet of the water pump (19) is connected to the inlet of the wastewater storage tank (20). The photometric detector probe (23) and the lower end of the reagent inlet tube are placed inside the wastewater storage chamber (20). The upper end of the photometric detector probe (23) is connected to the photometric detector body (22) outside the wastewater storage chamber (20). The upper end of the reagent inlet tube is connected to the outlet of the potassium iodide reagent storage tank (21) outside the wastewater storage chamber (20). A reagent output control valve is provided at the outlet of the potassium iodide reagent storage tank (21). The precipitation separation tank (4) is provided with a first flow regulating valve (2) at the upper rear outlet, the photocatalytic tank (6) is provided with a second flow regulating valve (13) at the upper rear outlet, the electrocatalytic tank (8) is provided with a third flow regulating valve (10) at the upper rear outlet, and the Fenton oxidation tank (9) is provided with a fourth flow regulating valve (12). A vertical pipe passes through the horizontal filter screen (3) and is placed in the sedimentation separation tank (4) below the horizontal filter screen (3). The upper end of the vertical pipe is connected to the inlet of the water pump (1). The water pump (1) is set at the upper end of the sedimentation separation tank (4). The outlet of the water pump (1) is connected to the inlet of the first flow regulating valve (2).

2. The wastewater treatment equipment with starch content detection function according to claim 1, characterized in that, The photocatalytic cell (6) is equipped with a visible light tube (5).

3. The wastewater treatment equipment with starch content detection function according to claim 1, characterized in that, The upper end of the Fenton oxidation tank (9) is provided with a ferrous sulfate solution storage tank (11) and a hydrogen peroxide solution storage tank (24). The outlets of the ferrous sulfate solution storage tank (11) and the hydrogen peroxide solution storage tank (24) are connected to the inlet of the Fenton oxidation tank (9). Valves are provided at the outlets of the ferrous sulfate solution storage tank (11) and the hydrogen peroxide solution storage tank (24).

4. The wastewater treatment equipment with starch content detection function according to claim 1, characterized in that, Electrode plates (7) are provided in the electrocatalytic cell (8).

5. The wastewater treatment equipment with starch content detection function according to claim 1, characterized in that, The filter (3) is a three-layer gradient composite filter.

6. The wastewater treatment equipment with starch content detection function according to claim 3, characterized in that, The ferrous sulfate solution storage tank (11) and the hydrogen peroxide solution storage tank (24) are made of stainless steel.

7. The wastewater treatment equipment with starch content detection function according to claim 4, characterized in that, The electrode plate (7) is a titanium-based coated electrode plate.

8. The wastewater treatment equipment with starch content detection function according to claim 1, characterized in that, The reagent output control valve is a quantitative valve.

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