Efficient reaction device for Fenton reaction

Abstract

The utility model discloses an efficient reaction device for Fenton reaction, which comprises an adjusting tank A and an adjusting tank B. A plurality of treatment tank groups are arranged between the adjusting tank A and the adjusting tank B. The treatment tank groups consist of a plurality of mixing tanks, the plurality of mixing tanks are mutually isolated by partition plates, the upper ends of the plurality of partition plates are respectively provided with an overflow port for wastewater circulation, and the upper ends of the plurality of partition plates are respectively provided with an overflow port. And rotating modules for controlling the flow direction of the wastewater are mounted on the regulating tank A and the regulating tank B respectively. The device is simple in structure, wastewater in the adjusting tank A can be subjected to split-flow treatment by arranging a plurality of treatment tank groups, the degradation effect of organic matters is directly improved by reducing the water quantity, meanwhile, the reaction time is shortened, the treatment efficiency is improved, in addition, each treatment tank group consists of a buffer tank, a treatment tank and a reaction tank, and the cost is reduced. The wastewater can be treated step by step, so that the situation that concentrated sulfuric acid and ferrous ions are added synchronously in the reaction tank is avoided, and the wastewater treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a high-efficiency reaction device for Fenton reaction. Background Art

[0002] The Fenton reaction is an inorganic chemical reaction in which hydrogen peroxide reacts with divalent iron ions under acidic conditions to generate hydroxyl radicals, which can oxidize many known organic compounds such as carboxylic acids, alcohols, and esters into inorganic forms. The Fenton reaction has a significant ability to remove difficult-to-degrade organic pollutants and is widely used in the field of wastewater treatment, such as paper industry wastewater, petrochemical wastewater, fine chemical wastewater, and wastewater from centralized wastewater treatment plants in industrial parks.

[0003] The Fenton reaction usually uses concentrated sulfuric acid to adjust the pH value of the wastewater to be treated to make it acidic. The existing Fenton reactor usually adds the reagents to the reaction tank at one time, allowing the wastewater and reagents to react in the reaction tank. Since the concentrated sulfuric acid and divalent iron ions are added simultaneously in the reaction tank during the process, this process easily causes some ferrous ions to be oxidized by the concentrated sulfuric acid, reducing the content of ferrous ions as a catalyst, thereby reducing the reaction rate and affecting the degradation of organic matter. In addition, the reagents are added to the reaction tank at one time to react, so the reaction time is relatively long, which is slow for wastewater treatment efficiency. Therefore, a high-efficiency reaction device for the Fenton reaction is proposed. Utility Model Content

[0004] The purpose of the present invention is to provide a high-efficiency reaction device for Fenton reaction to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a high-efficiency reaction device for Fenton reaction, comprising a regulating tank A and a regulating tank B, wherein a plurality of treatment tank groups are arranged between the regulating tank A and the regulating tank B, and the treatment tank groups are composed of a plurality of mixing tanks, and the plurality of mixing tanks are isolated from each other by partitions, and the upper ends of the plurality of the partitions are provided with overflow ports for wastewater circulation, and a rotating module for controlling the flow direction of the wastewater is installed on the regulating tank A and the regulating tank B.

[0006] As a further solution of the present invention: the multiple mixing tanks are specifically a buffer tank, a treatment tank, and a reaction tank. An overflow port is provided between the buffer tank and the regulating tank A, an overflow port is provided between the buffer tank and the treatment tank, an overflow port is provided between the treatment tank and the reaction tank, and an overflow port is provided between the reaction tank and the regulating tank B.

[0007] As a further solution of the present invention: it also includes an input pipe, and the number of the input pipe is multiple, and each of the input pipes corresponds to the regulating tank A, the buffer tank, the treatment tank, the reaction tank, and the regulating tank B one by one.

[0008] As a further solution of the present invention: stirring devices are provided in the regulating tank A, regulating tank B, buffer tank, treatment tank and reaction tank.

[0009] As a further solution of the present invention: the stirring device includes a stirring motor, and a stirring fan blade is installed at the output end of the stirring motor.

[0010] As a further solution of the present invention: the rotary module includes a pneumatic valve, a pH signal receiver is installed on the pneumatic valve, and an output end of the pneumatic valve is connected to the baffle.

[0011] As a further solution of the present invention: the number of the treatment pool groups is two, the two treatment pool groups are independent of each other, and both treatment pool groups are connected to the regulating pool A and the regulating pool B.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The present application sets up multiple groups of treatment tanks to divert the wastewater in the regulating tank A for treatment. The reduction in water volume directly improves the degradation effect of organic matter. At the same time, the reaction time is also shortened, and the treatment efficiency is improved. In addition, the treatment tank group is composed of a buffer tank, a treatment tank, and a reaction tank, which can gradually treat the wastewater, avoiding the simultaneous addition of concentrated sulfuric acid and divalent iron ions in the reaction tank, thereby improving the efficiency of wastewater treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the reaction device of the present invention;

[0015] Figure 2 This is a schematic diagram of wastewater flow in two treatment pools of the present invention;

[0016] Figure 3 This is a schematic diagram of the rotary module of the present utility model;

[0017] Figure 4 This is a schematic diagram of a stirring device of the present invention;

[0018] In the figure: 1. Regulating tank A; 2. Regulating tank B; 3. Buffer tank; 4. Treatment tank; 5. Reaction tank; 6. Rotating module; 6-1. Pneumatic valve; 6-2. pH signal receiver; 6-3. Baffle; 7. Stirring device; 7-1. Stirring motor; 7-2. Stirring fan blade; 8. Inlet pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-4 In an embodiment of the present invention, a high-efficiency reaction device for Fenton reaction includes a regulating tank A1 and a regulating tank B2. A plurality of treatment tank groups are arranged between regulating tank A1 and regulating tank B2. In this embodiment, preferably, the number of treatment tank groups is two, the two treatment tank groups are independent of each other, and the two treatment tank groups are connected to regulating tank A1 and regulating tank B2. The treatment tank group is composed of a plurality of mixing tanks, and the plurality of mixing tanks are isolated from each other by partitions. The upper ends of the plurality of partitions are provided with overflow ports for wastewater circulation. The plurality of mixing tanks are specifically a buffer tank 3, a treatment tank 4, and a reaction tank 5. An overflow port is arranged between the buffer tank 3 and the regulating tank A1 of the same treatment tank group. An overflow port is provided between the buffer tank 3 and the treatment tank 4, an overflow port is provided between the treatment tank 4 and the reaction tank 5, and an overflow port is provided between the reaction tank 5 and the regulating tank B2. A rotating module 6 for controlling the flow direction of wastewater is installed on both the regulating tank A1 and the regulating tank B2. When the wastewater entering the regulating tank A1 reacts fully with concentrated sulfuric acid, the pH reaches the set value, and the rotating module 6 opens. As the rotating module 6 opens, the wastewater in the regulating tank A1 can flow into the buffer tank 3 in the corresponding direction. Since the liquid is separated into at least two paths, the reduction in water volume directly improves the degradation effect of organic matter, and the reaction time is also shortened, and the treatment efficiency is improved.

[0021] See also Figure 1In one embodiment, in this embodiment, preferably, it further includes an input pipe 8, and the number of the input pipe 8 is multiple, and each input pipe 8 corresponds to the regulating tank A1, the buffer tank 3, the treatment tank 4, the reaction tank 5, and the regulating tank B2 respectively. The input pipe 8 corresponding to the regulating tank A1 is used to discharge concentrated sulfuric acid into the regulating tank A1 to adjust the pH value of the wastewater to be treated, and the input pipe 8 corresponding to the buffer tank 3 is used to discharge concentrated sulfuric acid into the buffer tank 3, so that the reaction between the wastewater and the concentrated sulfuric acid is more sufficient, and the redox reaction between the concentrated sulfuric acid and the divalent iron ions is avoided. The input pipe 8 corresponding to the treatment tank 4 is used to discharge divalent iron ions, usually iron salts, into the treatment tank 4. The input pipe 8 corresponding to the reaction tank 5 is used to discharge After hydrogen peroxide is added, the wastewater in the treatment tank 4 overflows into the reaction tank 5, and the divalent iron ions in the wastewater catalyze the hydrogen peroxide to produce hydroxyl radicals, thereby realizing the degradation of organic matter in the wastewater; since the reaction tank 5 is relatively narrow and long, the wastewater can achieve sufficient reaction during the flow process; the input pipe 8 corresponding to the regulating tank B2 is used to discharge alkali into the regulating tank B2 and react with the wastewater. The above steps add reactants to the wastewater one by one to make them react fully with the wastewater. Secondly, the reactants will not react synchronously, which can avoid concentrated sulfuric acid and divalent iron ions being added to the reaction tank at the same time to react, resulting in the oxidation of part of the ferrous ions by concentrated sulfuric acid in the process, reducing the content of ferrous ions as a catalyst, thereby reducing the reaction rate and affecting the degradation of organic matter.

[0022] See also Figure 4 In one embodiment, in this embodiment, preferably, a stirring device 7 is provided in each of the regulating tank A1, the regulating tank B2, the buffer tank 3, the treatment tank 4 and the reaction tank 5. The stirring device 7 includes a stirring motor 7-1. A stirring blade 7-2 is installed at the output end of the stirring motor 7-1. When the reactants enter the corresponding tank body, the stirring motor 7-1 is turned on to drive the stirring blade 7-2 to rotate. Through stirring, the rate of the Fenton reaction is accelerated, the reaction can be more complete, and the precipitation of the substance is also prevented. Secondly, the stirring blade 7-2 is fan-shaped and has a scraper wall, which can improve the stability and uniformity of the mixing of the reagent and the wastewater.

[0023] See also Figure 3 In one embodiment, in this embodiment, preferably, the rotating module 6 includes a pneumatic valve 6-1, a PH signal receiver 6-2 is installed on the pneumatic valve 6-1, and the output end of the pneumatic valve 6-1 is connected to the baffle 6-3.

[0024] Specifically, both regulating tank A1 and regulating tank B2 are equipped with a pH detector, which is connected to the pH signal receiver 6-2. By setting a value on the pH detector, when the pH in regulating tank A1 or regulating tank B2 reaches the set value, the pneumatic valve 6-1 opens, driving the baffle 6-3 to the open position, and the wastewater can overflow into the mixing tank at the rear end. When the pH in regulating tank A1 or regulating tank B2 does not reach the set value, the pneumatic valve 6-1 always remains closed, and the wastewater in regulating tank A1 continues to react.

[0025] The working principle and use process of the present invention are as follows: wastewater enters the regulating tank A1 by means of pumping. At this time, the rotating module 6 of the regulating tank A1 is in a closed state, and concentrated sulfuric acid enters the regulating tank A1 through the delivery pipe 8. Under the auxiliary stirring action of the stirring device 7, the wastewater fully reacts with the concentrated sulfuric acid, and the pH value of the wastewater begins to decrease. When the pH drops to the set value, the signal is transmitted to the pH signal receiver 6-2 of the rotating module 6, the baffle 6-3 is opened, and the wastewater begins to enter the rear end; after the pH of the wastewater is adjusted in the regulating tank A1, it is divided into two paths and enters the two treatment tank groups respectively. Since the liquid is divided into two paths, the reduction in water volume directly improves the degradation effect of organic matter, and the reaction time is also shortened, and the treatment efficiency is improved; the buffer tank 3 also adds a pipeline for concentrated sulfuric acid. When the pH transmission signal fails and the pH does not meet the conditions for the Fenton reaction, it can be sent to the buffer tank 3. 3 transports concentrated sulfuric acid, thereby lowering the pH to a value that satisfies the Fenton reaction; the wastewater from the buffer tank 3 enters the treatment tank 4, and the iron salts enter the treatment tank 4 through the input pipe 8. Under the auxiliary stirring action of the stirring device 7, the iron salts are also dissolved in the wastewater and precipitation is prevented; the wastewater in the treatment tank 4 continues to flow to the reaction tank 5, and hydrogen peroxide is added thereto through the input pipe 8 to produce a Fenton reaction, in which hydrogen peroxide reacts with divalent iron ions to generate hydroxyl radicals, which oxidize and remove organic matter in the wastewater; the reaction tank 5 is narrower and longer than the other tanks, in which the Fenton reaction can be fully carried out; under the action of the Fenton reaction, the organic matter in the wastewater of the reaction tank 5 is degraded, and the wastewater is then aggregated and flows to the regulating tank B2, and alkali is added thereto through the input pipe 8 to increase the pH value of the wastewater. After the pH reaches the set value, the rotating module 6 of the regulating tank B2 is opened, and the wastewater begins to flow to the next process.

[0026] Although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0027] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent modifications made according to the scope of the claims of the present application are within the scope of protection of the claims of the present application.

Claims

1. A high efficiency reaction device for Fenton reaction, characterized in that, The invention comprises a regulating tank A (1) and a regulating tank B (2), wherein a plurality of treatment tank groups are arranged between the regulating tank A (1) and the regulating tank B (2), wherein the treatment tank groups are composed of a plurality of mixing tanks, wherein the plurality of mixing tanks are isolated from each other by partitions, and the upper ends of the plurality of partitions are provided with overflow ports for wastewater circulation, and a rotating module (6) for controlling the flow direction of wastewater is installed on the regulating tank A (1) and the regulating tank B (2).

2. The high-efficiency reaction device for Fenton reaction according to claim 1, characterized in that: The multiple mixing tanks are specifically a buffer tank (3), a treatment tank (4), and a reaction tank (5). An overflow port is provided between the buffer tank (3) and the regulating tank A (1), an overflow port is provided between the buffer tank (3) and the treatment tank (4), an overflow port is provided between the treatment tank (4) and the reaction tank (5), and an overflow port is provided between the reaction tank (5) and the regulating tank B (2).

3. The high efficiency reaction device for Fenton reaction according to claim 2, characterized in that: It also includes an input pipe (8), the number of the input pipe (8) is multiple, and each input pipe (8) corresponds to the regulating tank A (1), the buffer tank (3), the treatment tank (4), the reaction tank (5), and the regulating tank B (2) one by one.

4. The high-efficiency reaction device for Fenton reaction according to claim 1, characterized in that: The regulating tank A (1), regulating tank B (2), buffer tank (3), treatment tank (4) and reaction tank (5) are all provided with stirring devices (7).

5. The high-efficiency reaction device for Fenton reaction according to claim 4, characterized in that: The stirring device (7) comprises a stirring motor (7-1), and a stirring fan blade (7-2) is installed at the output end of the stirring motor (7-1).

6. The high efficiency reaction device for Fenton reaction according to claim 1, characterized in that: The rotary module (6) comprises a pneumatic valve (6-1), a pH signal receiver (6-2) is mounted on the pneumatic valve (6-1), and an output end of the pneumatic valve (6-1) is connected to a baffle (6-3).

7. The high efficiency reaction device for Fenton reaction according to claim 1, characterized in that: There are two treatment pool groups, which are independent of each other and are both connected to the regulating pool A (1) and the regulating pool B (2).

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