Fenton oxidation reaction device

Abstract

The utility model discloses a Fenton oxidation reaction device which is characterized by comprising an iron-carbon reaction tank, a first Fenton oxidation tank and a second Fenton oxidation tank which are sequentially connected through a water pipe, iron-carbon filler is arranged in the iron-carbon reaction tank and filled with scrap iron and granular active carbon filler, and the first Fenton oxidation tank is connected with the second Fenton oxidation tank through a water pipe. The device has the advantages that ferrous sulfate is replaced by introducing the iron-carbon reaction tank, and the iron-carbon reaction tank is filled with articles which can be collected usually, so that the cost is lower than that of the ferrous sulfate; and the iron-carbon reaction tank can play roles in the following two aspects: 1, iron-carbon oxidation reaction is carried out on iron carbon and some substances in the wastewater to decompose part of organic matters, and 2, ferrous ions are generated after the reaction of sulfuric acid and iron and are provided for subsequent Fenton reaction, so that the wastewater purification cost of an enterprise is reduced on the whole, and the economic benefit of the enterprise is improved. And the purification discharge standard of the wastewater is improved.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to a Fenton oxidation reaction device. Background Art

[0002] As an advanced oxidation technology, Fenton oxidation is widely used in the field of environmental governance. Under acidic conditions, hydroxyl radicals are generated by reacting ferrous sulfate and hydrogen peroxide, and organic matter is degraded by the strong oxidizing property of hydroxyl radicals. The Fenton oxidation process can effectively degrade aromatic hydrocarbons, benzene rings, phenols, pesticides and other difficult-to-degrade organic matter. The previous treatment method used two tanks, and ferrous sulfate was added to one of the tanks to introduce iron ions for reaction. Ferrous sulfate was only used to provide iron ions and was not effectively utilized, which made the company's wastewater purification cost quite high. Utility Model Content

[0003] The purpose of the utility model is to solve the above technical problems and to provide a Fenton oxidation reaction device which can save costs, make full use of the added reagents and improve the quality of wastewater treatment.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A Fenton oxidation reaction device comprises an iron-carbon reaction tank, a first Fenton oxidation tank and a second Fenton oxidation tank which are connected in sequence through a water pipe, wherein an iron-carbon filler is arranged in the iron-carbon reaction tank, wherein the iron-carbon filler is filled with scrap iron and granular activated carbon filler, a sulfuric acid dosing device is arranged above the iron-carbon filler, and a hydrogen peroxide dosing device is arranged on the second Fenton oxidation tank.

[0006] In order to enable the reagents in the pool to be stirred more evenly, a further preferred technical solution is that the iron-carbon reaction pool, the first Fenton oxidation pool and the second Fenton oxidation pool are all provided with aeration pipes, and the air inlet pipes of the aeration pipes are connected to the output end of the fan.

[0007] In order to be able to automatically adjust the dosage of the feedback sulfuric acid, a further preferred technical solution is that a pH meter is provided in the iron-carbon reaction tank, and the pH meter is electrically connected to the regulating pump on the sulfuric acid dosing device.

[0008] In order to enable the reagents in the pools to be stirred more evenly, a further preferred technical solution is that a stirring device is provided in each of the first Fenton oxidation pool and the second Fenton oxidation pool, the stirring device comprises a stirring motor mounted on the upper surface of the first Fenton oxidation pool and the second Fenton oxidation pool through a fixed frame, the stirring motor is fixedly connected to a stirring shaft, a plurality of stirring components are horizontally provided on the stirring shaft, the stirring components comprise a stirring cross bar and stirring blades arranged to rotate through a rotating shaft and the stirring cross bar.

[0009] In order to automatically generate a turbulent flow in the pool, a further preferred technical solution is that the stirring cross bar is connected to the stirring blades via a universal joint.

[0010] In order to heat the wastewater to promote a more complete reaction, a further preferred technical solution is that the stirring shaft and the stirring crossbar are provided with heating wires, and the heating wires are connected to the heating devices on the first Fenton oxidation tank and the second Fenton oxidation tank.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the utility model introduces an iron-carbon reaction pool to replace ferrous sulfate. The iron-carbon reaction pool contains some items that can be collected at ordinary times, and the cost is lower than that of ferrous sulfate. The iron-carbon reaction pool can play the following two roles: first, iron-carbon oxidation reaction occurs between iron-carbon and some substances in wastewater to decompose some organic matter; second, ferrous ions generated by the reaction of sulfuric acid and iron provide ferrous ions for the subsequent Fenton reaction, which generally reduces the wastewater purification cost of the enterprise and improves the purification and discharge standards of wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] In the figure: 1. Iron-carbon reaction tank; 2. First Fenton oxidation tank; 3. Second Fenton oxidation tank; 4. Iron-carbon filler; 5. Sulfuric acid dosing device; 6. Hydrogen peroxide dosing device; 7. Aeration pipeline; 8. Fan; 9. pH meter; 10. Metering pump; 11. Stirring motor; 12. Stirring shaft; 13. Stirring blades; 14. Universal joint; 15. Stirring cross bar; 16. Inlet pipe; 17. Heating wire. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0015] Embodiment 1

[0016] like Figure 1As shown, a Fenton oxidation reaction device comprises an iron-carbon reaction pool 1, a first Fenton oxidation pool 2 and a second Fenton oxidation pool 3 which are sequentially connected by water pipes. An iron-carbon filler 4 is arranged in the iron-carbon reaction pool. The iron-carbon filler 4 is filled with scrap iron and granular activated carbon filler. The scrap iron and activated carbon filler are relatively easy to obtain, and the iron and sulfuric acid react to obtain ferrous ions for subsequent Fenton oxidation, which saves costs. The iron-carbon reaction pool itself can purify a part of the wastewater, thereby improving the degree of purification of the wastewater. A sulfuric acid dosing device 5 is arranged above the iron-carbon filler 4, and a hydrogen peroxide dosing device 6 is arranged on the second Fenton oxidation pool 3. Specifically, a top cover is arranged on each of the Fenton oxidation pools, and a plurality of mounting holes are arranged on the top cover for mounting water inlet pipes, water outlet pipes, dosing devices, stirring motors, air inlet pipes and other devices. The mounting positions of these devices are conventional settings, so they are not described in detail.

[0017] In order to make the reagents in the pools more evenly stirred, a further preferred technical solution is that the iron-carbon reaction pool 1, the first Fenton oxidation pool 2 and the second Fenton oxidation pool 3 are all provided with an aeration pipe 7, and the air inlet pipe 16 of the aeration pipe 7 is connected to the output end of the fan 8. The aeration pipe is inflated by the fan so that the bottom of the reaction pool can continuously generate gas, which can help the reaction of organic wastewater on the one hand, and on the other hand, it also plays a stirring role, so that the wastewater and the reaction reagent can be fully mixed. In order to automatically adjust the amount of sulfuric acid added, a further preferred technical solution is that a pH meter 9 is provided in the iron-carbon reaction pool 1, and the pH meter 9 is electrically connected to the regulating pump 10 on the sulfuric acid dosing device 5. The pH meter 9 extends to the bottom through the iron-carbon filler. Since the most suitable pH value for the Fenton reaction is about 3 to 4, when the pH value measured by the pH meter is greater than or less than this range, the pH meter is fed back to the regulating pump 10 for regulation, and the flow rate of the sulfuric acid dosing device 5 is controlled to achieve automatic control.

[0018] In order to make the reagent in the pool more uniformly stirred, a further preferred technical solution is that the first Fenton oxidation pool 2 and the second Fenton oxidation pool 3 are both provided with a stirring device, the stirring device includes a stirring motor 11 installed on the upper surface of the first Fenton oxidation pool 2 and the second Fenton oxidation pool 3 through a fixed frame, the stirring motor 11 is fixedly connected to the stirring shaft 12, and a plurality of stirring components are horizontally arranged on the stirring shaft 12. In this embodiment, each stirring shaft is provided with 4 pairs of 8 stirring components, which are distributed at different heights of the Fenton oxidation pool to ensure uniform stirring, and the stirring components include a stirring cross bar 15 and a stirring blade 13 is arranged by rotating the rotating shaft and the stirring cross bar 15, and the outlet of the water inlet pipe is arranged at the top of the Fenton oxidation pool, so that the wastewater can impact the stirring blade 13 when entering the Fenton oxidation pool to rotate the stirring blade, thereby improving the stirring effect. In order to automatically generate a turbulent flow in the pool, in some other embodiments, the stirring cross bar 15 is connected to the stirring blade 13 through a universal joint 14, so that the blade can be more easily rotated in all directions, achieving the effect of turbulent flow stirring. In order to heat the wastewater to promote a more complete reaction, a further preferred technical solution is that a heating wire 17 is provided on the stirring shaft 12 and the stirring cross bar 15, and the heating wire 17 is connected to the heating devices on the first Fenton oxidation tank and the second Fenton oxidation tank (not shown in the figure, it is a conventional connection method in the field, such as a rotary connection, etc., which is not limited by the present invention), and the organic wastewater is heated by the heating wire to increase the Fenton oxidation reaction rate.

[0019] The utility model introduces an iron-carbon reaction pool to replace ferrous sulfate. The iron-carbon reaction pool is filled with items that can be collected at ordinary times, and the cost is lower than that of ferrous sulfate. The iron-carbon reaction pool can play the following two roles: first, iron-carbon oxidation reaction occurs between iron-carbon and some substances in wastewater to decompose part of organic matter; second, ferrous ions are generated after the reaction of sulfuric acid and iron, providing ferrous ions for subsequent Fenton reaction. Generally speaking, the wastewater purification cost of the enterprise is reduced, and the purification and discharge standard of the wastewater is improved.

[0020] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A Fenton oxidation reaction device, characterized in that: The invention comprises an iron-carbon reaction tank, a first Fenton oxidation tank and a second Fenton oxidation tank which are connected in sequence through water pipes. The iron-carbon reaction tank is provided with an iron-carbon filler which is filled with scrap iron and granular activated carbon filler. A sulfuric acid dosing device is provided above the iron-carbon filler. The second Fenton oxidation tank is provided with a hydrogen peroxide dosing device.

2. A Fenton oxidation reaction device as claimed in claim 1, characterized in that: The iron-carbon reaction tank, the first Fenton oxidation tank and the second Fenton oxidation tank are all provided with aeration pipelines, and the air inlet pipes of the aeration pipelines are all connected to the output end of the fan.

3. A Fenton oxidation reaction device as claimed in claim 1, characterized in that: A pH meter is arranged in the iron-carbon reaction tank, and the pH meter is electrically connected to a regulating pump on the sulfuric acid dosing device.

4. A Fenton oxidation reaction device as claimed in claim 1, characterized in that: A stirring device is provided in the first Fenton oxidation tank and the second Fenton oxidation tank. The stirring device includes a stirring motor installed on the upper surface of the first Fenton oxidation tank and the second Fenton oxidation tank through a fixed frame. The stirring motor is fixedly connected to a stirring shaft. A plurality of stirring components are horizontally provided on the stirring shaft. The stirring components include a stirring cross bar and stirring blades that are rotatably arranged through a rotating shaft and the stirring cross bar.

5. A Fenton oxidation reaction device as claimed in claim 4, characterized in that: The stirring cross bar is connected with the stirring blades through a universal joint.

6. A Fenton oxidation reaction device as claimed in claim 4, characterized in that: The stirring shaft and the stirring crossbar are provided with electric heating wires, and the electric heating wires are connected to the heating devices on the first Fenton oxidation tank and the second Fenton oxidation tank.

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