Photo-Fenton sewage treatment system

Abstract

The utility model discloses a photo-Fenton sewage treatment system, which comprises a sewage regulating tank, which is connected with a sulfuric acid charging bucket and a ferrous sulfate charging bucket through pipelines; the pipeline mixer is connected to the sewage adjusting tank through a pipeline; the pipeline mixer is also connected with a hydrogen peroxide barrel through a pipeline; the photocatalytic equipment is connected to the pipeline mixer through a pipeline, the photocatalytic equipment comprises a plurality of photo-Fenton reaction cavities which are connected in parallel, and the photocatalytic equipment is connected to the sewage regulating tank through a T-shaped pipeline. The sewage treatment system at least has the following beneficial effects that the sewage regulating tank is connected with the pipeline mixer, the pipeline mixer is connected with the photocatalysis equipment, and the photocatalysis equipment is connected with the sewage regulating tank through the T-shaped pipeline to form a circulating structure, so that sewage which does not reach the standard can be circulated back to the treatment system, and the sewage treatment efficiency of the whole system is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and in particular relates to a photo-Fenton sewage treatment system. Background Art

[0002] Modern industrial wastewater has the characteristics of large chromaticity, complex composition, high chemical oxygen demand (COD), and difficulty in degradation. Some pharmaceutical and chemical wastewater even contains a large amount of antibiotics and antibacterial substances. Their strong biological toxicity will disrupt the microbial balance in the environment and pose a serious threat to humans. As one of the many industrial wastewater deep treatment equipment, Fenton oxidation equipment is widely used in the treatment of industrial high-difficulty wastewater due to its environmental friendliness, strong oxidizing ability, rapid reaction, simple operation, stable effect, and wide range of applications. The principle of Fenton technology is Fe 2+ The chain reaction between Fenton and H2O2 produces hydroxyl radicals (·OH) with strong oxidizing ability. ·OH can non-selectively oxidize a variety of organic pollutants and achieve the degradation of organic pollutants in water. However, the existing Fenton oxidation equipment is single, and only uses independent homogeneous reaction pools to achieve organic matter treatment, relying on single H2O2 and ·OH to achieve Fe 3+ / Fe 2+ The reduction cycle and oxidation of organic matter will lead to high iron sludge production, poor COD removal effect, and low oxidant utilization, which seriously restricts the industrial application of Fenton technology. For example, patent CN210261403U discloses a UV photolysis-Fenton reaction device, which uses a separate reaction tank, resulting in low oxidant utilization. Utility Model Content

[0003] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages to be described below.

[0004] In order to achieve these purposes and other advantages according to the utility model, a photo-Fenton sewage treatment system is provided, comprising:

[0005] A sewage regulating tank, which is connected to a sulfuric acid feeding tank and a ferrous sulfate feeding tank through pipelines;

[0006] A pipeline mixer, which is connected to the sewage regulating tank through a pipeline; the pipeline mixer is also connected to a hydrogen peroxide bucket through a pipeline;

[0007] A photocatalytic device is connected to the pipeline mixer through a pipeline, the photocatalytic device comprises a plurality of parallel photo-Fenton reaction chambers, and the photocatalytic device is connected to the sewage regulating tank through a T-shaped pipeline.

[0008] Preferably, the photocatalytic device further comprises:

[0009] A wastewater diversion trough connected to the plurality of photo-Fenton reaction chambers;

[0010] A flocculation sedimentation tank connected to the wastewater diversion trough;

[0011] A water quality detection tank; it is connected to the flocculation sedimentation tank through a pipeline, and the water quality detection tank is connected to the sewage regulating tank through a T-shaped pipeline.

[0012] Preferably, a pH sensor and a temperature sensor are provided in the sewage regulating tank, a sulfuric acid metering pump is provided on the pipeline between the sulfuric acid feeding barrel and the sewage regulating tank, and a ferrous sulfate metering pump is provided on the pipeline between the ferrous sulfate feeding barrel and the sewage regulating tank.

[0013] Preferably, an aeration head is installed at the bottom of the sewage regulating tank, one end of the aeration head is connected to a blower through a pipeline, the other end of the aeration head is connected to a pipeline mixer through a pipeline, the pipeline mixer is connected to the photo-Fenton reaction chamber through a pipeline, and a metering pump A is provided on the pipeline between the aeration head and the pipeline mixer.

[0014] Preferably, the pipeline mixer is connected to the water inlet of the photo-Fenton reaction chamber through a pipeline, the photo-Fenton reaction chamber is provided with a circulation pipeline, the circulation pipeline is provided with a circulation pump, the bottom of the photo-Fenton reaction chamber is connected to the wastewater diversion trough, a water valve is provided between the photo-Fenton reaction chamber and the wastewater diversion trough, one end of the T-shaped pipeline is connected to the sewage regulating tank, and the other end of the T-shaped pipeline is a discharge end.

[0015] Preferably, the photo-Fenton reaction chamber is a double-layer shell structure, a low-pressure ultraviolet light source is installed in the inner layer, a wastewater reaction zone is between the inner and outer layers, the inner layer is a quartz inner layer, and the outer layer is a plastic outer layer.

[0016] Preferably, the control system is electrically connected to the sewage regulating tank, the pipeline mixer, and the photocatalytic device, and the control system is electrically connected to the low-pressure ultraviolet light source.

[0017] The utility model includes at least the following beneficial effects: a circulation structure formed by connecting a sewage regulating tank to a pipeline mixer, connecting the pipeline mixer to a photocatalytic device, and then connecting the photocatalytic device to a sewage regulating tank through a T-shaped pipeline can circulate substandard sewage back into the treatment system, and the mortgaged ultraviolet light source in the photo-Fenton reaction chamber can increase the photo-Fenton reaction rate, which is beneficial to improving the sewage treatment efficiency of the entire system.

[0018] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the photo-Fenton sewage treatment system of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the photocatalytic device of the photo-Fenton sewage treatment system of the utility model;

[0021] Figure 3 It is a schematic diagram of the structure of the photo-Fenton reaction chamber of the photo-Fenton sewage treatment system of the utility model. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0023] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0024] It should be noted that in the description of the present invention, the orientation or position relationship indicated by the term is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0026] In addition, in the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] like Figure 1 to Figure 3 As shown, a light-Fenton wastewater treatment system comprises:

[0028] A sewage regulating tank 1, which is connected to a sulfuric acid feeding tank 11 and a ferrous sulfate feeding tank 12 through a pipeline;

[0029] A pipeline mixer 2, which is connected to the sewage regulating tank 1 through a pipeline; the pipeline mixer 2 is also connected to a hydrogen peroxide bucket 21 through a pipeline;

[0030] The photocatalytic device 3 is connected to the pipeline mixer 2 through a pipeline. The photocatalytic device 3 includes four parallel photo-Fenton reaction chambers 31 . The photocatalytic device 3 is connected to the sewage regulating tank 1 through a T-shaped pipeline 35 .

[0031] Working principle: After adding sewage into the sewage regulating tank 1, the amount of sulfuric acid and ferrous sulfate added to the sewage regulating tank 1 is adjusted by the sulfuric acid feeding barrel 11 and the ferrous sulfate feeding barrel 12, and the pH is adjusted at the same time. The regulated sewage is mixed with a certain amount of hydrogen peroxide solution in the hydrogen peroxide barrel 21 through the pipeline mixer 2, and injected into the four parallel photo-Fenton reaction chambers 31 of the photocatalytic device 3. If the standards are met after the reaction, it is directly discharged. If the standards are not met, it re-enters the sewage regulating tank 1. Figure 1 The arrows at the sulfuric acid feeding barrel 11 and the ferrous sulfate feeding barrel 12 represent the flow directions of sulfuric acid and ferrous sulfate solution respectively; the arrow at the hydrogen peroxide barrel 21 represents the flow direction of hydrogen peroxide; and the other arrows represent the flow direction of sewage. Figure 2 The arrows in the figure represent the flow direction of sewage.

[0032] In the above technical solution, the photocatalytic device 3 further includes:

[0033] A wastewater diversion trough 32 connected to the plurality of photo-Fenton reaction chambers 31;

[0034] A flocculation sedimentation tank 33, which is connected to the wastewater diversion trough 32;

[0035] The water quality detection tank 34 is connected to the flocculation sedimentation tank 33 through a pipeline, and the water quality detection tank 34 is connected to the sewage regulating tank 1 through a T-shaped pipeline 35. After the sewage reacts in the photo-Fenton reaction chamber 31, it enters the flocculation sedimentation tank 33 through the wastewater diversion trough 32, and the supernatant after flocculation sedimentation enters the water quality detection tank 34. If it meets the standards after the reaction, it is directly discharged. If it does not meet the standards, it re-enters the sewage regulating tank 1.

[0036] In the above technical solution, a pH sensor 13 and a temperature sensor 14 are provided in the sewage regulating tank 1, a sulfuric acid metering pump 111 is provided on the pipeline between the sulfuric acid feeding barrel 11 and the sewage regulating tank 1, and a ferrous sulfate metering pump 121 is provided on the pipeline between the ferrous sulfate feeding barrel 12 and the sewage regulating tank 1. The sulfuric acid metering pump 111 is used to add sulfuric acid, the ferrous sulfate metering pump 121 is used to add ferrous sulfate solution, and the pH sensor 13 and the temperature sensor 14 are used to monitor the pH and temperature of the solution in the sewage regulating tank, respectively.

[0037] In the above technical solution, an aeration head 15 is installed at the bottom of the sewage regulating tank 1, one end of the aeration head 15 is connected to a blower 16 through a pipeline, the other end of the aeration head 15 is connected to a pipeline mixer 2 through a pipeline, the pipeline mixer 2 is connected to the photo-Fenton reaction chamber 31 through a pipeline, and a metering pump A17 is arranged on the pipeline between the aeration head 15 and the pipeline mixer 2. The blower 16 and the aeration head 15 can make the solution in the sewage regulating tank uniformly transfer mass and improve the utilization rate of the chemical agent. The metering pump A17 is used to transport the regulated sewage to the pipeline mixer 2, and the pipeline mixer 2 is used to transport the sewage after adding hydrogen peroxide to the photocatalytic device 3.

[0038] In the above technical solution, the pipeline mixer is connected to the water inlet 311 of the photo-Fenton reaction chamber through a pipeline, a circulation pipeline 312 is provided on the photo-Fenton reaction chamber 31, a circulation pump 3121 is provided on the circulation pipeline, the bottom of the photo-Fenton reaction chamber 31 is connected to the wastewater diversion trough 32, a water valve 321 is provided between the photo-Fenton reaction chamber 31 and the wastewater diversion trough 32, one end of the T-shaped pipeline 35 is connected to the sewage regulating tank 1, and the other end of the T-shaped pipeline 35 is a discharge end. The sewage enters the photo-Fenton reaction chamber 31 from the water inlet 311 of the photo-Fenton reaction chamber 31 through the pipeline mixer 2, and then the circulation pump 3121 continuously transfers the solution at the bottom to the top to keep the solution uniform. The water valve 321 is used to control the wastewater entering the wastewater diversion trough 32. If the wastewater in the water quality detection tank 33 meets the standards, it is directly discharged through the discharge end of the T-type pipe 35. If it does not meet the standards, it will re-enter the sewage regulating tank 1 through one end connected to the sewage regulating tank.

[0039] In the above technical solution, the photo-Fenton reaction chamber is a double-layer shell structure, a low-pressure ultraviolet light source 313 is installed in the inner layer, and the wastewater reaction zone is between the inner and outer layers, the inner layer is a quartz inner layer, and the outer layer is a plastic outer layer. The low-pressure ultraviolet light source 313 is used to catalyze the Fenton reaction.

[0040] In the above technical solution, the control system 4 is electrically connected to the sewage regulating tank 1, the pipeline mixer 2, and the photocatalytic device 3, and the control system 4 is electrically connected to the low-pressure ultraviolet light source 313. The control system 4 is used to control the pumps, valves and low-pressure ultraviolet light source 313 in the entire sewage treatment system.

[0041] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A photo-Fenton wastewater treatment system, characterized in that: include: A sewage regulating tank, which is connected to a sulfuric acid feeding tank and a ferrous sulfate feeding tank through pipelines; A pipeline mixer, which is connected to the sewage regulating tank through a pipeline; the pipeline mixer is also connected to a hydrogen peroxide bucket through a pipeline; A photocatalytic device is connected to the pipeline mixer through a pipeline, the photocatalytic device comprises a plurality of parallel photo-Fenton reaction chambers, and the photocatalytic device is connected to the sewage regulating tank through a T-shaped pipeline.

2. The photo-Fenton wastewater treatment system according to claim 1, characterized in that: The photocatalytic device also includes: A wastewater diversion trough connected to the plurality of photo-Fenton reaction chambers; A flocculation sedimentation tank connected to the wastewater diversion trough; A water quality detection tank; it is connected to the flocculation sedimentation tank through a pipeline, and the water quality detection tank is connected to the sewage regulating tank through a T-shaped pipeline.

3. The photo-Fenton wastewater treatment system according to claim 1, characterized in that: A pH sensor and a temperature sensor are arranged in the sewage regulating tank, a sulfuric acid metering pump is arranged on the pipeline between the sulfuric acid feeding barrel and the sewage regulating tank, and a ferrous sulfate metering pump is arranged on the pipeline between the ferrous sulfate feeding barrel and the sewage regulating tank.

4. The photo-Fenton wastewater treatment system according to claim 2, characterized in that: An aeration head is installed at the bottom of the sewage regulating tank, one end of the aeration head is connected to a blower through a pipeline, the other end of the aeration head is connected to a pipeline mixer through a pipeline, the pipeline mixer is connected to the photo-Fenton reaction chamber through a pipeline, and a metering pump A is arranged on the pipeline between the aeration head and the pipeline mixer.

5. The photo-Fenton wastewater treatment system according to claim 2, characterized in that: The pipeline mixer is connected to the water inlet of the photo-Fenton reaction chamber through a pipeline, a circulation pipeline is provided on the photo-Fenton reaction chamber, a circulation pump is provided on the circulation pipeline, the bottom of the photo-Fenton reaction chamber is connected to the wastewater diversion trough, a water valve is provided between the photo-Fenton reaction chamber and the wastewater diversion trough, one end of the T-shaped pipeline is connected to the sewage regulating tank, and the other end of the T-shaped pipeline is a discharge end.

6. The photo-Fenton wastewater treatment system according to claim 2, characterized in that: The photo-Fenton reaction chamber is a double-layer shell structure, a low-pressure ultraviolet light source is installed in the inner layer, a wastewater reaction zone is between the inner and outer layers, the inner layer is a quartz inner layer, and the outer layer is a plastic outer layer.

7. The photo-Fenton wastewater treatment system according to claim 6, characterized in that: It also includes a control system, which is electrically connected to the sewage regulating tank, the pipeline mixer, and the photocatalytic device, and the control system is electrically connected to the low-pressure ultraviolet light source.

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