Heterogeneous fluidized bed Fenton oxidation tower

Abstract

The utility model discloses a heterogeneous fluidized bed Fenton oxidation tower, which relates to the related technical field of water treatment, and comprises a tower body and a base, a supporter is arranged in the tower body, two circulating pumps are arranged at the top of the base, a mixing component is arranged at the water outlet end of each circulating pump, and the mixing component comprises a first mixing cylinder and a second mixing cylinder. A ferrous sulfate pipe penetrates through the bottom of the first mixing cylinder, and a first communicating pipe is connected between the first mixing cylinder and the lower part in the tower body. Through the arrangement of the first mixing cylinder, the small cylinder and the communicating hole, sewage enters the first mixing cylinder through the first conveying pipe and the circulating pump, at the moment, ferrous sulfate is input into the small cylinder in the first mixing cylinder through the ferrous sulfate pipe, and the sewage in the first mixing cylinder penetrates through the communicating hole, enters the small cylinder and is in contact with the ferrous sulfate to be mixed; the residence time of the sewage is prolonged, so that the reaction time is prolonged, the sewage is prevented from quickly passing through a mixing structure, and the sewage can be uniformly mixed with ferrous sulfate.

Description

TECHNICAL FIELD

[0001] The utility model relates to water treatment related technical field, concretely is a kind of heterogeneous fluidized bed fenton oxidation tower. BACKGROUND

[0002] Fenton method is a kind of using ferrous ion to carry out hydrogen peroxide reaction, and the high oxidation ability hydroxyl radical produced will oxidize the organic matter in waste water into small molecular organic matter, even mineralize into carbon dioxide and water, and it is often used in the field of sewage treatment.

[0003] The existing heterogeneous fluidized bed fenton oxidation tower is mainly through the mixing of ferrous sulfate and hydrogen peroxide and sewage to generate fenton reaction, so as to realize the treatment of sewage, but the reaction is located in the inside of tower body, and most of the volume in the inside of tower body is occupied by carrier, so that the mixing space is small, so that the contact time is short when sewage is mixed with ferrous sulfate and hydrogen peroxide for mixing reaction, and it is difficult to mix uniformly to realize high-efficiency fenton reaction, so that the fenton reaction effect is poor. UTILITY MODEL CONTENT

[0004] Therefore, the utility model discloses the purpose is to provide a kind of heterogeneous fluidized bed fenton oxidation tower, to solve the technical problems mentioned in the above background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of heterogeneous fluidized bed fenton oxidation tower, including tower body and base, the carrier is arranged in the inside of tower body, the base top is equipped with two circulating pumps, and circulating pump outlet is provided with mixing assembly, the mixing assembly includes first mixing cylinder and second mixing cylinder, the first mixing cylinder bottom is penetrated with ferrous sulfate pipe, and the first mixing cylinder is connected with first communicating pipe between the inside of tower body lower side;The second mixing cylinder bottom is penetrated with hydrogen peroxide pipe, and the second mixing cylinder top is connected with distribution head by second communicating pipe;Second mixing cylinder and first mixing cylinder inside are all fixed with small cylinder, and the two small cylinders one side are all set with communicating hole.

[0006] By adopting the technical scheme, part of the sewage enters the inside of the first mixing cylinder through two first conveying pipes and one circulating pump, at this time, the ferrous sulfate pipe inputs ferrous sulfate into the small cylinder in the first mixing cylinder, and the sewage in the first mixing cylinder passes through the communication hole to enter the small cylinder to contact and mix with the ferrous sulfate; another part of the sewage enters the second mixing cylinder through another two first conveying pipes and another circulating pump, at this time, the hydrogen peroxide pipe inputs hydrogen peroxide into the small cylinder in the second mixing cylinder, and the sewage and the ferrous sulfate mixture in the second mixing cylinder pass through the communication hole to enter the small cylinder to contact and mix with the hydrogen peroxide; since the diameter of the communication hole is smaller than the inner diameter of the first conveying pipe, and the communication hole is provided with a plurality of and is distributed in a ring array shape, the sewage can be uniformly distributed in the inside of the small cylinder by being divided, so that the contact area is increased, and the mixing efficiency is further improved; the sewage and the ferrous sulfate mixture are injected into the inside of the tower body below through the first communication pipe, and then the sewage and the hydrogen peroxide mixture are injected into the distribution head through the second communication pipe, the distribution head uniformly disperses the hydrogen peroxide sewage and sprays it into the ferrous sulfate sewage, so that the contact area of the hydrogen peroxide and the ferrous sulfate is increased, thereby realizing high-efficiency Fenton reaction, and the sewage mixed with the ferrous sulfate and the hydrogen peroxide enters the tower body to react, so that the plugging phenomenon is reduced.

[0007] Further, the tower body is installed on the top of the base, and a water inlet groove is connected to the top of the inside of the tower body, a water inlet pipe and a sulfuric acid adding pipe are connected to the top of the tower body on one side respectively, and a water outlet pipe is connected to the top of the outer surface of the tower body.

[0008] By adopting the technical scheme, the sewage enters the water inlet groove from the water inlet pipe, and the amount of sulfuric acid added into the water inlet groove can be adjusted according to the pH value of the sewage, the two circulating pumps start to send the sewage in the water inlet groove into the first mixing cylinder and the second mixing cylinder through the first conveying pipe, the sewage and the ferrous sulfate mixture are injected into the inside of the tower body below through the first communication pipe, and then the sewage and the hydrogen peroxide mixture are injected into the distribution head through the second communication pipe, the distribution head uniformly disperses the hydrogen peroxide sewage and sprays it into the ferrous sulfate sewage, so that the contact area of the hydrogen peroxide and the ferrous sulfate is increased, thereby realizing high-efficiency Fenton reaction, and the sewage mixed with the ferrous sulfate and the hydrogen peroxide enters the tower body to react, so that the plugging phenomenon is reduced, most of the generated trivalent iron is crystallized or precipitated on the surface of the carrier, the crystal is FeOOH, FeOOH has the effect of heterogeneous catalysis, can greatly reduce the dosage of ferrous sulfate, can reduce the production of a large amount of chemical sludge in the traditional Fenton method, and then the treated sewage is discharged through the water outlet pipe.

[0009] Further, the first conveying pipe is connected between the two circulating pumps and the water inlet groove, the first mixing cylinder and the second mixing cylinder.

[0010] Through adoption of the technical scheme, the two circulating pumps send the sewage in the water inlet tank into the first mixing cylinder and the second mixing cylinder respectively through the first conveying pipe after starting.

[0011] Further, the first mixing cylinder, the second mixing cylinder, the small cylinder, the first communicating pipe, the second communicating pipe, the ferrous sulfate pipe and the hydrogen peroxide pipe are all made of 316L stainless steel.

[0012] Through adoption of the technical scheme, the 316L stainless steel has excellent mechanical strength and corrosion resistance, so that no oxidation corrosion phenomenon occurs in the long-term contact with the sewage mixture, prolonging the service life of the structure.

[0013] Further, the communicating holes are arranged in multiple and are distributed in a ring array shape.

[0014] Through adoption of the technical scheme, since the communicating holes are arranged in multiple and are distributed in a ring array shape, the sewage can be uniformly distributed in the small cylinder, thereby increasing the contact area and further improving the mixing efficiency.

[0015] Further, the diameter of the communicating hole is smaller than the inner diameter of the first conveying pipe.

[0016] Through adoption of the technical scheme, since the diameter of the communicating hole is smaller than the inner diameter of the first conveying pipe, the sewage passing time is prolonged, further improving the mixing efficiency.

[0017] In summary, the utility model mainly has the following beneficial effects:

[0018] 1. The utility model discloses a sewage mixing structure, which comprises a first mixing cylinder, a small cylinder, a second mixing cylinder, a first conveying pipe, a second conveying pipe, a circulating pump, a ferrous sulfate pipe, a hydrogen peroxide pipe and a communicating hole.

[0019] 2. The utility model discloses a sewage mixing structure, which comprises a first mixing cylinder, a small cylinder, a second mixing cylinder, a first conveying pipe, a second conveying pipe, a circulating pump, a ferrous sulfate pipe, a hydrogen peroxide pipe and a communicating hole.

[0020] 3, the utility model discloses a first communication pipe and the second communication pipe are set up, through the first communication pipe, the sewage and ferrous sulfate mixture are injected into the inside below tower body, then through the second communication pipe, the sewage and hydrogen peroxide mixture are injected into distribution head, and distribution head is evenly dispersed after spraying to ferrous sulfate sewage in hydrogen peroxide sewage, and the area of hydrogen peroxide and ferrous sulfate after contact is increased, thereby realizing high -efficient fenton reaction, and the sewage is mixed after ferrous sulfate and hydrogen peroxide and enters the tower body and reacts, reduces the blocking phenomenon and occurs, improves the reaction effect and reduces the blockage. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structural schematic diagram of the utility model;

[0022] Figure 2 It is the tower body cross section structural schematic diagram of the utility model;

[0023] Figure 3 It is the first communication pipe structural schematic diagram of the utility model;

[0024] Figure 4 It is the first mixing cylinder cross section structural schematic diagram of the utility model;

[0025] Figure 5 It is the second communication pipe structural schematic diagram of the utility model;

[0026] Figure 6 It is the second mixing cylinder cross section structural schematic diagram of the utility model.

[0027] In the drawing: 1, tower body;2, carrier;3, water inlet groove;4, water inlet pipe;5, sulfuric acid dosing pipe;6, water outlet pipe;7, first conveying pipe;8, circulating pump;9, mixing assembly;901, first mixing cylinder;902, second mixing cylinder;903, small cylinder;904, communication hole;905, first communication pipe;906, second communication pipe;907, ferrous sulfate pipe;908, hydrogen peroxide pipe;10, base;11, distribution head. DETAILED DESCRIPTION

[0028] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings of the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0029] The embodiments will be described below according to the overall structure of the utility model.

[0030] Embodiment one:

[0031] A heterogeneous fluidized bed fenton oxidation tower, like Figures 1-6As shown, including tower body 1 and base 10, characterized by: the tower body 1 inside the carrier 2 is provided, the base 10 top is provided with two circulating pumps 8, circulating pump 8 outflow end is provided with mixing assembly 9, mixing assembly 9 includes first mixing cylinder 901 and second mixing cylinder 902, first mixing cylinder 901 bottom is penetrated with ferrous sulfate pipe 907, first mixing cylinder 901 is connected with the first communication pipe 905 between the inside lower part of tower body 1;Second mixing cylinder 902 bottom is penetrated with hydrogen peroxide pipe 908, second mixing cylinder 902 top is connected with distribution head 11 through second communication pipe 906;Second mixing cylinder 902 and first mixing cylinder 901 inside are fixed with small cylinder 903, both sides of two small cylinders 903 are provided with communication hole 904, a part of sewage enters the first mixing cylinder 901 inside through two first conveying pipes 7 and a circulating pump 8, at this time ferrous sulfate pipe 907 inputs ferrous sulfate into the small cylinder 903 in first mixing cylinder 901, and the sewage in first mixing cylinder 901 passes through communication hole 904 and enters small cylinder 903 to contact and mix with ferrous sulfate;Another part of sewage enters second mixing cylinder 902 through another two first conveying pipes 7 and another circulating pump 8, at this time hydrogen peroxide pipe 908 inputs hydrogen peroxide into small cylinder 903 in second mixing cylinder 902, and the sewage and ferrous sulfate mixture in second mixing cylinder 902 pass through communication hole 904 and enter small cylinder 903 to contact and mix with hydrogen peroxide;Because the diameter of communication hole 904 is less than the inner diameter of first conveying pipe 7, and communication hole 904 is provided with multiple and is distributed in annular array shape, the sewage can be shunted and uniformly distributed in small cylinder 903, so as to increase the contact area and further improve the mixing efficiency, the sewage and ferrous sulfate mixture are injected into the lower part of tower body 1 through first communication pipe 905, and then the sewage and hydrogen peroxide mixture are injected into distribution head 11 through second communication pipe 906, distribution head 11 uniformly disperses hydrogen peroxide sewage and sprays it into ferrous sulfate sewage, increases the contact area of hydrogen peroxide and ferrous sulfate, so as to realize high-efficiency fenton reaction, and the sewage mixed with ferrous sulfate and hydrogen peroxide enters tower body 1 to react, reduces the occurrence of blocking phenomenon.

[0032] Referring to Figure 1 and Figure 2In the above embodiment, the tower body 1 is installed on the top of the base 10, the water inlet chute 3 is connected to the top of the tower body 1, the first conveying pipe 7 is connected between the water inlet chute 3, the first mixing cylinder 901 and the second mixing cylinder 902, the water inlet pipe 4 and the sulfuric acid dosing pipe 5 are connected to the top of the tower body 1 on one side, the water outlet pipe 6 is connected to the top of the outer surface of the tower body 1, the sewage enters the water inlet chute 3 from the water inlet pipe 4, and the amount of sulfuric acid added to the water inlet chute 3 can be adjusted according to the pH value of the sewage, the two circulating pumps 8 send the sewage in the water inlet chute 3 into the first mixing cylinder 901 and the second mixing cylinder 902 through the first conveying pipe 7, the mixture of sewage and ferrous sulfate is injected into the lower part of the tower body 1 through the first communication pipe 905, and the mixture of sewage and hydrogen peroxide is injected into the distribution head 11 through the second communication pipe 906, the distribution head 11 uniformly disperses the hydrogen peroxide sewage and sprays it into the ferrous sulfate sewage, increases the contact area of hydrogen peroxide and ferrous sulfate, and realizes high-efficiency Fenton reaction, and the sewage mixed with ferrous sulfate and hydrogen peroxide enters the tower body 1 to react, reduces the occurrence of blockage, and most of the generated trivalent iron is crystallized or precipitated on the surface of the carrier 2, the crystal is FeOOH, FeOOH has the effect of heterogeneous catalysis, can greatly reduce the dosage of ferrous sulfate, can reduce the production of a large amount of chemical sludge in the traditional Fenton method, and then the treated sewage is discharged through the water outlet pipe 6.

[0033] Example two:

[0034] On the basis of the above embodiment one, in order to prolong the service life of the structure, the following settings are made.

[0035] Reference Figures 1-6 In the above embodiment, the first mixing cylinder 901, the second mixing cylinder 902, the small cylinder 903, the first communication pipe 905, the second communication pipe 906, the ferrous sulfate pipe 907 and the hydrogen peroxide pipe 908 are all made of 316L stainless steel material, which has excellent mechanical strength and corrosion resistance, so it can not appear oxidation corrosion phenomenon in the long-term contact process with sewage mixture, prolong the service life of the structure.

[0036] Example three:

[0037] On the basis of the above embodiment two, in order to make the mixture more uniform, the following settings are made.

[0038] Reference Figure 4 and Figure 6In the above embodiment, the plurality of communication holes 904 are arranged in an annular array, and the diameter of the communication holes 904 is smaller than the inner diameter of the first conveying pipe 7. Since the diameter of the communication holes 904 is smaller than the inner diameter of the first conveying pipe 7, the plurality of communication holes 904 are arranged in an annular array, so that the sewage can be uniformly distributed in the small cylinder 903, thereby increasing the contact area and further improving the mixing efficiency.

[0039] The implementation principle of the utility model is as follows: first, the sewage enters the water inlet groove 3 from the water inlet pipe 4, and the amount of sulfuric acid added to the water inlet groove 3 can be adjusted according to the pH value of the sewage through the sulfuric acid adding pipe 5. After the two circulating pumps 8 are started, the sewage in the water inlet groove 3 is sent into the first mixing cylinder 901 and the second mixing cylinder 902 through the first conveying pipe 7.

[0040] Part of the sewage enters the first mixing cylinder 901 through the two first conveying pipes 7 and one circulating pump 8. At this time, the ferrous sulfate pipe 907 inputs ferrous sulfate into the small cylinder 903 in the first mixing cylinder 901, and the sewage in the first mixing cylinder 901 passes through the communication hole 904 to enter the small cylinder 903 to mix with the ferrous sulfate. The other part of the sewage enters the second mixing cylinder 902 through the other two first conveying pipes 7 and the other circulating pump 8. At this time, the hydrogen peroxide pipe 908 inputs hydrogen peroxide into the small cylinder 903 in the second mixing cylinder 902, and the sewage and ferrous sulfate mixture in the second mixing cylinder 902 pass through the communication hole 904 to enter the small cylinder 903 to mix with the hydrogen peroxide. Since the diameter of the communication hole 904 is smaller than the inner diameter of the first conveying pipe 7, and the communication hole 904 is arranged in an annular array, the sewage can be uniformly distributed in the small cylinder 903, thereby increasing the contact area and further improving the mixing efficiency.

[0041] The sewage and ferrous sulfate mixture is injected into the lower part of the tower body 1 through the first communication pipe 905, and the sewage and hydrogen peroxide mixture is injected into the distribution head 11 through the second communication pipe 906. The distribution head 11 uniformly disperses the hydrogen peroxide sewage and sprays it into the ferrous sulfate sewage, thereby increasing the contact area of the hydrogen peroxide and the ferrous sulfate, realizing high-efficiency Fenton reaction, and reducing the occurrence of blockage. Most of the generated trivalent iron is crystallized or precipitated on the surface of the carrier 2, and the crystal is FeOOH. FeOOH has the effect of heterogeneous catalysis, which can greatly reduce the amount of ferrous sulfate added, and can reduce the amount of chemical sludge produced by traditional Fenton method. After the treatment is completed, the sewage is discharged through the water outlet pipe 6.

[0042] Although the embodiments of the utility model have been shown and described, the specific embodiments are only the explanation of the utility model, and are not the limitation of the utility model, and the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable way, and the person skilled in the art can make the modification, replacement and change of the embodiments without the creative contribution after reading the specification without departing from the principles and the purpose of the utility model, but as long as in the claim range of the utility model, it is protected by the patent law.

Claims

1. A heterogeneous fluidized bed Fenton oxidation column comprising a column body (1) and a base (10), characterized in that: The tower body (1) is internally provided with a carrier (2), the base (10) top is provided with two circulating pumps (8), and the circulating pump (8) water outlet is provided with a mixing assembly (9), the mixing assembly (9) includes a first mixing cylinder (901) and a second mixing cylinder (902), the first mixing cylinder (901) bottom is penetrated by a ferrous sulfate pipe (907), and the first mixing cylinder (901) is connected with the tower body (1) lower portion by a first communicating pipe (905); the second mixing cylinder (902) bottom is penetrated by a hydrogen peroxide pipe (908), and the second mixing cylinder (902) top is connected with a distribution head (11) by a second communicating pipe (906); the second mixing cylinder (902) and the first mixing cylinder (901) are internally fixed with small cylinders (903), and the two small cylinders (903) are provided with communicating holes (904) on one side.

2. The heterogeneous fluidized bed Fenton oxidation column according to claim 1, characterized in that: The tower body (1) is mounted on the top of the base (10), and the tower body (1) is connected with a water inlet tank (3) on the top, one side of the tower body (1) top is connected with a water inlet pipe (4) and a sulfuric acid adding pipe (5), and the outer surface of the tower body (1) is connected with a water outlet pipe (6).

3. The heterogeneous fluidized bed Fenton oxidation column according to claim 2, characterized in that: The two circulating pumps (8) are connected with the water inlet tank (3), the first mixing cylinder (901) and the second mixing cylinder (902) by a first conveying pipe (7).

4. The heterogeneous fluidized bed Fenton oxidation column according to claim 1, characterized in that: The first mixing cylinder (901), the second mixing cylinder (902), the small cylinder (903), the first communicating pipe (905), the second communicating pipe (906), the ferrous sulfate pipe (907) and the hydrogen peroxide pipe (908) are all made of 316L stainless steel material.

5. The heterogeneous fluidized bed Fenton oxidation column according to claim 1, characterized in that: The communicating hole (904) is provided with a plurality of communicating holes (904), and the plurality of communicating holes (904) are arranged in an annular array.

6. The heterogeneous fluidized bed Fenton oxidation column according to claim 3, characterized in that: The diameter of the communicating hole (904) is smaller than the inner diameter of the first conveying pipe (7).

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