Intelligent dosing sectional type advanced oxidation device

Abstract

The utility model discloses an intelligent dosing sectional type advanced oxidation device which comprises a PH (potential of hydrogen) adjusting tank, a catalyst tank, an oxidation tank group, a neutralization tank and an air floatation tank which are connected in sequence, the oxidation pond group comprises a plurality of oxidation ponds connected in sequence and an on-line instrument flow cell communicated with all the oxidation ponds, a detection system is arranged in the on-line instrument flow cell, and the on-line instrument flow cell is in signal communication with the PH adjusting pond and the catalyst pond. Selecting a certain reaction tank as an optimal monitoring point; internal parameters of the oxidation reaction can be accurately reflected in real time, the dosage is further optimized, the reagent consumption is reduced on the basis of improving the reaction efficiency, and the sludge yield is reduced; the on-line monitoring flow cell is arranged, and the water flow velocity is higher than that of a probe directly inserted into the reaction tank, so that the influence of pollutant attachment on a measured value can be effectively prevented; and the on-line detection instrument is always kept in the liquid, so that a protection effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment equipment, in particular to an intelligent dosing and segmented advanced oxidation device. Background Art

[0002] Currently, the treatment process for high-concentration, refractory organic wastewater includes many advanced oxidation processes, such as Fenton, ozone catalytic oxidation, electrocatalytic oxidation, wet oxidation, and so on. The most commonly used is the Fenton process. The essence of the Fenton process is the chain reaction between divalent iron ions (Fe2+) and hydrogen peroxide to catalyze the generation of hydroxyl radicals, which have strong oxidizing ability and an oxidation potential second only to fluorine, as high as 2.80V. In addition, hydroxyl radicals have a high electronegativity or electrophilicity, with an electron affinity of up to 569.3kJ and strong addition reaction characteristics. Therefore, Fenton reagent can non-selectively oxidize most organic matter in water, making it particularly suitable for the oxidation treatment of organic wastewater that is difficult to biodegrade or difficult to be oxidized by general chemical oxidation.

[0003] The Fenton process currently used in engineering has the following disadvantages:

[0004] Insufficient monitoring of pollutant concentrations in incoming water, resulting in fluctuating concentrations that affect the overall process effect;

[0005] Inaccurate dosing control of H2O2 and FeSO4 will lead to waste of reagents and increased costs due to excessive dosing; insufficient dosing will result in low removal rate and substandard performance; a certain amount of H2O2 can produce ·OH, but excess H2O2 can react with ·OH and act as a scavenger of ·OH. Specifically, in the accelerated stage of the oxidation reaction, a certain amount of H2O2 will be rapidly decomposed to produce ·OH to oxidize and decompose organic matter, while excess H2O2 will react with the produced ·OH to generate a series of weak oxidizing free radicals, such as HO2·. In addition, HO2· will trigger subsequent related free radical chain reactions, consume strong oxidizing free radicals, and weaken the oxidation performance of the system. The specific reaction equation is as follows:

[0006] OH+H2O2→H2O+HO2

[0007] HO2·+·OH→H2O+O2

[0008] 3. The pH is placed directly at a fixed position in the oxidation reaction tank, resulting in a monitoring blind spot, and the pH probe is prone to scaling, thus affecting the monitoring data, etc. Utility Model Content

[0009] The purpose of the present utility model is to provide an intelligent dosing segmented advanced oxidation device to solve the problems raised in the above background technology.

[0010] To achieve the above objectives, the present invention provides the following technical solutions:

[0011] An intelligent dosing segmented advanced oxidation device, comprising a pH adjustment tank, a catalyst tank, an oxidation tank group, a neutralization tank, and a flotation tank connected in sequence;

[0012] The oxidation tank group includes multiple oxidation tanks connected in sequence and an online instrument circulation tank connected to all the oxidation tanks. A detection system is provided in the online instrument circulation tank, and the online instrument circulation tank is connected to the pH adjustment tank and the catalyst tank by signal.

[0013] As a further solution of the present invention: the front end of the pH adjustment tank is connected to a regulating tank, and the regulating tank is provided with a TOC online detection system.

[0014] As a further solution of the present invention: the pH adjustment tank is provided with a concentrated sulfuric acid dosing system, and the concentrated sulfuric acid dosing system is in signal communication with the online instrument circulation tank.

[0015] As a further solution of the present invention: the catalyst pool is provided with a ferrous sulfate dosing system, and the ferrous sulfate dosing system is in signal communication with the online instrument flow cell.

[0016] As a further solution of the present invention: the front water inlet of the oxidation tank group is connected to a hydrogen peroxide dosing system, and the TOC online detection system and the ferrous sulfate dosing system are in signal communication with the hydrogen peroxide dosing system.

[0017] As a further solution of the present invention: the oxidation pool group includes a first oxidation pool, a second oxidation pool, and a third oxidation pool connected in sequence.

[0018] As a further solution of the present invention: the first oxidation tank, the second oxidation tank, and the third oxidation tank are all connected to the online instrument circulation tank through a circulation pipe, and the circulation pipes connecting the first oxidation tank, the second oxidation tank, and the third oxidation tank and the online instrument circulation tank are all equipped with circulation pumps and valves.

[0019] As a further solution of the present invention: the detection system includes pH online detection and ORP online detection.

[0020] As a further solution of the present invention: the neutralization tank is provided with a sodium hydroxide dosing system.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present application adopts a segmented type, and during operation, by comparing the process parameters (including pH, ORP, COD removal rate, etc.) in each tank body, the optimal monitoring point of pH and ORP in a certain reaction tank is selected; the internal parameters of the oxidation reaction can be reflected in real time and accurately, and the dosage can be further optimized, thereby reducing the consumption of reagents and reducing the sludge production on the basis of improving the reaction efficiency; an online monitoring circulation pool device is set as the installation point of instruments such as pH and ORP, and the water flow rate of the probe is greater than that when it is directly inserted into the reaction tank, which can effectively prevent the measurement value from being affected by the attachment of pollutants; the circulation pool design can ensure that the online detection instruments (pH, ORP) are always kept in the liquid, playing a protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a process flow chart of this embodiment;

[0023] Figure 2 This is a schematic diagram of the online instrument flow cell of this embodiment;

[0024] In the figure: 1- regulating tank, 2- PH adjustment tank, 3- catalyst tank, 4- first oxidation tank, 5- second oxidation tank, 6- third oxidation tank, 7- neutralization tank, 8- flotation tank, 9- TOC online detection system, 10- concentrated sulfuric acid dosing system, 11- ferrous sulfate dosing system, 12- hydrogen peroxide dosing system, 13- sodium hydroxide dosing system, 14- online instrument circulation pool, 15- PH online detection, 16- ORP online detection, 17- circulation pump, 18- valve. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-2 In an embodiment of the utility model, an intelligent dosing segmented advanced oxidation device includes a regulating tank 1, a pH adjustment tank 2, a catalyst tank 3, an oxidation tank group, a neutralization tank 7, and a flotation tank 8 arranged in sequence. In this embodiment, the oxidation tank group includes a first oxidation tank 4, a second oxidation tank 5, and a third oxidation tank 6 connected in sequence.

[0027] The regulating tank 1 is provided with a TOC online detection system 9, the pH adjustment tank 2 is provided with a concentrated sulfuric acid dosing system 10, the catalyst tank 3 is provided with a ferrous sulfate dosing system 11, and the neutralization tank 7 is provided with a sodium hydroxide dosing system 13.

[0028] The first oxidation tank 4, the second oxidation tank 5, and the third oxidation tank 6 are all connected to the online instrument circulation tank 14 through a circulation pipeline. The circulation pipelines connecting the first oxidation tank 4, the second oxidation tank 5, and the third oxidation tank 6 to the online instrument circulation tank 14 are all equipped with a circulation pump 17 and a valve 18. The online instrument circulation tank 14 includes an online pH detector 15 and an online ORP detector 16. The online instrument circulation tank 14 can detect the ORP and pH values in the oxidation tank online in real time. The online pH detector 15 and the online ORP detector 16 in the online instrument circulation tank 14 are always kept in the liquid to play a protective role. The online instrument circulation tank 14 is linked with the front-end concentrated sulfuric acid dosing system 10, the ferrous sulfate dosing system 11, and the hydrogen peroxide dosing system 12 to adjust the optimal dosing amount of the dosing system. The TOC online detection system 9 interlocks with the ferrous sulfate dosing system 11 and the hydrogen peroxide dosing system 12 to perform intermittent corrections. The online instrument flow cell 14 interlocks with the front-end concentrated sulfuric acid dosing system 10, the ferrous sulfate dosing system 11, and the hydrogen peroxide dosing system 12. In the event of a conflict, the interlocking TOC online detection system 9 takes precedence. A circulation pump 17 is installed between any oxidation tank and the pH online detection system 15, with valves 18 located on both sides of the circulation pump 17.

[0029] When the utility model is in use, sewage enters the regulating tank 1, the pH adjustment tank 2, the catalyst tank 3, the first oxidation tank, the second oxidation tank, the third oxidation tank, the neutralization tank 7, and the flotation tank 8 in sequence. During operation, the process parameters (including pH, ORP, COD removal rate, etc.) of the first oxidation tank 4, the second oxidation tank 5, and the third oxidation tank 6 are compared. Through valve control, a certain oxidation tank is selected as the best monitoring point for pH and ORP; the circulation pool can detect the ORP and pH values in the oxidation tank online in real time. Before the Fenton system is officially put into operation, the ORP and pH values confirmed during the early trial operation will be The specified parameters are set in the ORP and pH systems. During the formal operation, the optimal dosing amount of the dosing system is adjusted by online monitoring of ORP and pH data and interlocking with the concentrated sulfuric acid dosing system 10, the ferrous sulfate dosing system 11 and the hydrogen peroxide dosing system 12; the TOC online detector is intermittently corrected during the interlocking control with the catalyst and oxidant dosing systems, and the circulation pool system is interlocked with the concentrated sulfuric acid dosing system, the ferrous sulfate dosing system and the hydrogen peroxide dosing system for real-time control. When the two conflict, the TOC online detection interlocking shall prevail.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0031] In addition, it should be understood that although this specification is described in terms of 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.

Claims

1. An intelligent dosing segmented advanced oxidation device, characterized in that: It comprises a pH adjustment tank (2), a catalyst tank (3), an oxidation tank group, a neutralization tank (7), and an air flotation tank (8) which are connected in sequence; The oxidation tank group comprises a plurality of oxidation tanks connected in sequence and an online instrument flow tank (14) connected to all the oxidation tanks. A detection system is provided in the online instrument flow tank (14). The online instrument flow tank (14) is in signal communication with a pH adjustment tank (2) and a catalyst tank (3).

2. The intelligent dosing staged advanced oxidation device according to claim 1, characterized in that: The front end of the pH adjustment tank (2) is connected to a regulating tank (1), and the regulating tank (1) is provided with a TOC online detection system (9).

3. The intelligent dosing staged advanced oxidation device according to claim 1, characterized in that: The pH adjustment tank (2) is provided with a concentrated sulfuric acid dosing system (10), and the concentrated sulfuric acid dosing system (10) is in signal communication with the online instrument flow tank (14).

4. The intelligent dosing staged advanced oxidation device according to claim 2, characterized in that: The catalyst pool (3) is provided with a ferrous sulfate dosing system (11), and the ferrous sulfate dosing system (11) is in signal communication with the online instrument flow cell (14).

5. The intelligent dosing staged advanced oxidation device according to claim 4, characterized in that: The front water inlet of the oxidation tank group is connected to a hydrogen peroxide dosing system (12), and the TOC online detection system (9) and the ferrous sulfate dosing system (11) are in signal communication with the hydrogen peroxide dosing system (12).

6. The intelligent dosing staged advanced oxidation device according to claim 1, characterized in that: The oxidation tank group comprises a first oxidation tank (4), a second oxidation tank (5), and a third oxidation tank (6) which are connected in sequence.

7. The intelligent dosing staged advanced oxidation device according to claim 6, characterized in that: The first oxidation tank (4), the second oxidation tank (5), and the third oxidation tank (6) are all connected to the online instrument circulation tank (14) through a circulation pipeline, and the circulation pipelines connecting the first oxidation tank (4), the second oxidation tank (5), and the third oxidation tank (6) and the online instrument circulation tank (14) are all provided with a circulation pump (17) and a valve (18).

8. The intelligent dosing staged advanced oxidation device according to claim 1, characterized in that: The detection system includes pH online detection (15) and ORP online detection (16).

9. The intelligent dosing staged advanced oxidation device according to claim 1, characterized in that: The neutralization tank (7) is provided with a sodium hydroxide dosing system (13).

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