M-cresol-containing wastewater treatment system and fenton reaction tank

Abstract

The utility model discloses a kind of m-cresol-containing wastewater treatment system and fenton reaction pool, wherein m-cresol-containing wastewater treatment system, including fenton reaction pool, first ultraviolet lamp and second ultraviolet lamp are arranged in fenton reaction pool, first ultraviolet lamp emits ultraviolet light with wavelength of 254 nanometer, second ultraviolet lamp emits ultraviolet light with wavelength of 185 nanometer.The utility model is in fenton reaction pool two kinds of ultraviolet lamp, ultraviolet lamp with wavelength 254nm can effectively stimulate hydrogen peroxide in fenton reaction, produce more hydroxyl radical, enhance oxidation capacity;Collaborate 185 nm ultraviolet lamp, can directly crack refractory organic matter (m-cresol) or water molecule in wastewater and produce hydroxyl radical, so that the fenton reaction pool of improved implementation 98% m-cresol removal efficiency, be conducive to and biochemical method is combined to reach new discharge standard requirement;Meanwhile, reduce about 20% dosing amount, reduce operating cost;Also reduce sludge production.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment equipment, and in particular to a wastewater treatment system containing m-cresol and a Fenton reaction tank. Background Technology

[0002] m-Cresol has a wide range of applications in the pharmaceutical industry, mainly used in the production of various drugs. For example, it can be used as a raw material in the preparation of anticancer drugs. Therefore, more and more biopharmaceutical companies are using m-cresol as a raw material, resulting in wastewater containing m-cresol with concentrations as high as 500~1000 mg / L. Previously, local discharge standards were relatively lenient, usually <2.0 mg / L.

[0003] Similar to the patent document with publication number CN1403393A, conventional m-cresol wastewater treatment uses the Fenton oxidation method combined with a biochemical method.

[0004] However, the existing Fenton oxidation method can only achieve a removal efficiency of 90% for m-cresol, which greatly limits the final m-cresol removal efficiency of traditional methods. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned problems in the prior art and to provide a wastewater treatment system containing m-cresol and a Fenton reaction tank.

[0006] The objective of this utility model is achieved through the following technical solution: A wastewater treatment system containing m-cresol includes a Fenton reaction tank, wherein an ultraviolet lamp module is installed inside the Fenton reaction tank; When there is one ultraviolet lamp module, the ultraviolet lamp module includes a first ultraviolet lamp and a second ultraviolet lamp. The first ultraviolet lamp emits ultraviolet light with a wavelength of 254 nanometers, and the second ultraviolet lamp emits ultraviolet light with a wavelength of 185 nanometers. When there are multiple ultraviolet lamp modules, each ultraviolet lamp module includes at least one of a first ultraviolet lamp and a second ultraviolet lamp, and the Fenton reaction cell simultaneously contains both a first ultraviolet lamp and a second ultraviolet lamp.

[0007] Preferably, the ultraviolet lamp modules are arranged in multiple evenly distributed circles on the inner wall of the Fenton reaction cell.

[0008] Preferably, the ultraviolet lamp module includes an ultraviolet lamp mounting block disposed on the inner wall of the Fenton reaction cell. The top of the ultraviolet lamp mounting block extends to the top of the Fenton reaction cell. The ultraviolet lamp mounting block is provided with at least one wiring groove extending downward from its upper end and a plurality of mounting holes that are vertically connected to the wiring groove and distributed vertically. A first ultraviolet lamp or a second ultraviolet lamp is installed at each mounting hole.

[0009] Preferably, the first ultraviolet lamp and the second ultraviolet lamp are respectively disposed inside a quartz sleeve, and the quartz sleeve is sealed and installed at the mounting hole.

[0010] Preferably, the inner end of the quartz sleeve is provided with a sealing plug.

[0011] Preferably, a biochemical tank is provided downstream of the Fenton reaction tank.

[0012] Preferably, the biochemical tank is a moving bed biofilm reactor or the biochemical tank contains MBBR packing material.

[0013] Preferably, a coagulation tank, a flocculation tank, a sedimentation tank, an equalization tank, and an intermediate tank are arranged sequentially between the Fenton reaction tank and the biochemical tank.

[0014] Preferably, the downstream of the biochemical tank is connected to the secondary sedimentation tank.

[0015] A Fenton reaction cell, wherein an ultraviolet lamp module is installed inside the Fenton reaction cell. When there is one ultraviolet lamp module, the ultraviolet lamp module includes a first ultraviolet lamp and a second ultraviolet lamp. The first ultraviolet lamp emits ultraviolet light with a wavelength of 254 nanometers, and the second ultraviolet lamp emits ultraviolet light with a wavelength of 185 nanometers. When there are multiple ultraviolet lamp modules, each ultraviolet lamp module includes at least one of a first ultraviolet lamp and a second ultraviolet lamp, and the Fenton reaction cell simultaneously contains both a first ultraviolet lamp and a second ultraviolet lamp.

[0016] The advantages of this utility model's technical solution are mainly reflected in: This invention adds a UV lamp module to the existing Fenton reactor, employing two wavelengths of UV lamps: a 254nm UV lamp, which effectively excites hydrogen peroxide (H2O2) in the Fenton reaction, generating more hydroxyl radicals (·OH) and enhancing oxidation capacity; and a 185nm UV lamp, which directly breaks down recalcitrant organic matter (m-cresol) in the wastewater to generate hydroxyl radicals, thus enabling the improved Fenton reactor to achieve a 98% m-cresol removal efficiency. This facilitates integration with biochemical methods to meet new emission standards. Simultaneously, it reduces chemical dosage by approximately 20%, lowering operating costs and reducing sludge production.

[0017] The structure of the UV lamp module of this utility model facilitates the immersion installation of the UV lamp module, while ensuring the sealing and service life of the UV lamp module.

[0018] The biochemical treatment tank of this invention adopts a moving bed biofilm reactor, which can further improve the removal efficiency of m-cresol based on the Fenton reaction, so that the final effluent concentration reaches 0.2 mg / L and the total removal efficiency of m-cresol is 99.98%, which exceeds the requirements of the new emission standards. At the same time, compared with the traditional activated sludge process, the moving bed biofilm reactor reduces the sludge discharge by about 30% and reduces the sludge disposal cost by 30%. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the m-cresol-containing wastewater treatment system of this utility model; Figure 2 This is a schematic diagram showing the distribution of the ultraviolet lamp module in the Fenton reaction cell of this utility model; Figure 3 This is a partial cross-sectional view of the ultraviolet lamp module of this utility model. Detailed Implementation

[0020] The purpose, advantages, and features of this utility model will be illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of applying the technical solutions of this utility model, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by this utility model.

[0021] In the description of the solution, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] Example 1 The present invention discloses a wastewater treatment system containing m-cresol, which is described below with reference to the accompanying drawings. Figure 1 -Appendix Figure 3 As shown, it includes a Fenton reaction cell 100, and an ultraviolet lamp module 101 is installed inside the Fenton reaction cell 100. When there is only one ultraviolet lamp module, the ultraviolet lamp module 101 includes a first ultraviolet lamp 102 and a second ultraviolet lamp 103. The first ultraviolet lamp 102 emits ultraviolet light with a wavelength of 254 nanometers, and the second ultraviolet lamp 103 emits ultraviolet light with a wavelength of 185 nanometers. When there are multiple ultraviolet lamp modules, the ultraviolet lamp module 101 includes at least one of a first ultraviolet lamp 102 and a second ultraviolet lamp 103, and the Fenton reaction cell includes a first ultraviolet lamp and a second ultraviolet lamp.

[0023] As attached Figure 2 As shown, multiple ultraviolet lamp modules 101 are evenly distributed around the inner wall of the Fenton reaction tank 100. The number of ultraviolet lamp modules 101 can be designed as needed, for example, four. They are arranged around the stirrer 104 inside the Fenton reaction tank 100. Under the action of the stirrer 104, m-cresol, hydrogen peroxide, etc. in the wastewater can receive ultraviolet light more fully, which is beneficial to improving the treatment efficiency.

[0024] In this embodiment, the ultraviolet lamp module 101 is installed using an immersion method. To ensure safety and extend the service life of the ultraviolet lamp module 101, as shown in the attached... Figure 1 Appendix Figure 3 As shown, the ultraviolet lamp module 101 includes an ultraviolet lamp mounting block 105 disposed on the inner wall of the Fenton reaction cell 100. The ultraviolet lamp mounting block 105 can be fixed in the Fenton reaction cell 100 in a known feasible manner, such as by bonding, screwing, welding, etc., which is not limited here.

[0025] The top of the ultraviolet lamp mounting block 105 extends to the top of the Fenton reaction cell 100. The ultraviolet lamp mounting block 105 is provided with at least one wiring groove 106 extending downward from its upper end and a plurality of mounting holes 107 that are vertically connected to the wiring groove 106 and distributed vertically. A first ultraviolet lamp 102 or a second ultraviolet lamp 103 is installed at each mounting hole 107.

[0026] To protect the first UV lamp 102 and the second UV lamp 103, the first UV lamp 102 and the second UV lamp 103 are respectively disposed inside a quartz sleeve 108. The quartz sleeve 108 is sealed and installed at the mounting hole 107. For example, the quartz sleeve 108 is installed at the mounting hole 107 by a sealing ring, thereby preventing liquid from entering the inner end of the quartz tube. Of course, a known sealing material 109, such as sealant or sealant, can also be used to seal the gap between the quartz sleeve 108 and the wall of the mounting hole 107. Furthermore, to ensure the stability of the quartz sleeve 108, the outer wall of the quartz sleeve 108 can be provided with an external thread section near the inner end, and the small-diameter section of the mounting hole 107 is a threaded hole that matches the external thread section of the quartz sleeve 108, so that the quartz sleeve 108 can be threadedly connected to the mounting hole 107.

[0027] To further improve sealing and protect the first UV lamp 102 and the second UV lamp 103, a sealing plug 110 is provided at the inner end of the quartz sleeve 108 (the end inserted into the UV lamp mounting block 105). Simultaneously, the power cords 111 of the first UV lamp 102 and the second UV lamp 103 extend from the sealing plug 110 and can extend through the wiring groove 106 to the top of the Fenton reaction cell for power connection. The sealing plug 110 is, for example, obtained by sealing the opening at the inner end of the quartz sleeve 108 with sealant.

[0028] As attached Figure 1 As shown, downstream of the Fenton reactor 100, there are sequentially arranged a coagulation tank 200, a flocculation tank 300, a sedimentation tank 400, an equalization tank 500, an intermediate tank 600, a biological treatment tank 700, and a secondary sedimentation tank 800. Thus, the effluent from the Fenton reactor 100 undergoes coagulation in the coagulation tank 200, flocculation in the flocculation tank 300, and particle sedimentation in the sedimentation tank 400 before entering the equalization tank 500 to adjust the pH value. After pH adjustment, it enters the intermediate tank 600 to adjust the water volume and balance the water quality. The water in the intermediate tank 600 is pumped into the biological treatment tank 700 for reaction, and finally passes through the secondary sedimentation tank 800 to filter particles, resulting in effluent that meets discharge standards.

[0029] The specific structures of the coagulation tank 200, flocculation tank 300, sedimentation tank 400, equalization tank 500, intermediate tank 600, biological treatment tank 700 and secondary sedimentation tank 800 are known technologies and will not be described in detail here.

[0030] The biological treatment tank 700 can use activated sludge for further wastewater treatment. More preferably, the biological treatment tank 700 uses a known moving bed biofilm reactor, or the biological treatment tank 700 uses activated sludge while also being filled with MBBR packing material 710, the filling volume of which is 50% of the volume of the biological treatment tank 700. This combines the characteristics of the biofilm method and the activated sludge method, thereby achieving a m-cresol removal efficiency of over 99.5%.

[0031] Furthermore, similar to existing technologies, the upstream of the Fenton reaction tank 100 can also be connected to a pH adjustment tank 500 to adjust the pH value of the wastewater so that the wastewater is suitable for Fenton process treatment. The specific structure of this tank is known technology and will not be described in detail here.

[0032] This utility model has many other embodiments. All technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A wastewater treatment system containing m-cresol, comprising a Fenton reaction tank, characterized in that: The Fenton reaction cell is equipped with an ultraviolet lamp module; When there is one ultraviolet lamp module, the ultraviolet lamp module includes a first ultraviolet lamp and a second ultraviolet lamp, the first ultraviolet lamp emits ultraviolet light with a wavelength of 254 nanometers, and the second ultraviolet lamp emits ultraviolet light with a wavelength of 185 nanometers. When there are multiple ultraviolet lamp modules, each ultraviolet lamp module includes at least one of a first ultraviolet lamp and a second ultraviolet lamp, and the Fenton reaction cell simultaneously contains both a first ultraviolet lamp and a second ultraviolet lamp.

2. The m-cresol-containing wastewater treatment system according to claim 1, characterized in that: The ultraviolet lamp modules are multiple and evenly distributed around the circumference on the inner wall of the Fenton reaction tank.

3. The m-cresol-containing wastewater treatment system according to claim 1, characterized in that: The ultraviolet lamp module includes an ultraviolet lamp mounting block disposed on the inner wall of the Fenton reaction cell. The top of the ultraviolet lamp mounting block extends to the top of the Fenton reaction cell. The ultraviolet lamp mounting block is provided with at least one wiring groove extending downward from its upper end and multiple mounting holes that are vertically connected to the wiring groove and distributed vertically. A first ultraviolet lamp or a second ultraviolet lamp is installed at each mounting hole.

4. The m-cresol-containing wastewater treatment system according to claim 3, characterized in that: The first ultraviolet lamp and the second ultraviolet lamp are respectively disposed inside a quartz sleeve, and the quartz sleeve is sealed and installed at the mounting hole.

5. The m-cresol-containing wastewater treatment system according to claim 4, characterized in that: The inner end of the quartz sleeve is provided with a sealing plug.

6. The m-cresol-containing wastewater treatment system according to any one of claims 1-5, characterized in that: A biochemical tank is located downstream of the Fenton reaction tank.

7. The m-cresol-containing wastewater treatment system according to claim 6, characterized in that: The biochemical tank is a moving bed biofilm reactor or contains MBBR packing material.

8. The m-cresol-containing wastewater treatment system according to claim 6, characterized in that: Between the Fenton reaction tank and the biochemical tank, there are sequentially arranged a coagulation tank, a flocculation tank, a sedimentation tank, an equalization tank, and an intermediate tank.

9. The m-cresol-containing wastewater treatment system according to claim 6, characterized in that: The downstream of the biochemical tank is connected to the secondary sedimentation tank.

10. A Fenton reaction cell, characterized in that: The Fenton reaction cell is equipped with an ultraviolet lamp module. When there is one ultraviolet lamp module, the ultraviolet lamp module includes a first ultraviolet lamp and a second ultraviolet lamp, the first ultraviolet lamp emits ultraviolet light with a wavelength of 254 nanometers, and the second ultraviolet lamp emits ultraviolet light with a wavelength of 185 nanometers. When there are multiple ultraviolet lamp modules, each ultraviolet lamp module includes at least one of a first ultraviolet lamp and a second ultraviolet lamp, and the Fenton reaction cell simultaneously contains both a first ultraviolet lamp and a second ultraviolet lamp.

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