Efficient Fenton fluidized bed reactor

Abstract

The utility model provides an efficient Fenton fluidized bed reactor. The reactor comprises a cylinder body, a fluidization distributor, a reflux pipeline, a hydrogen peroxide feeding port, a conical guide plate, a central guide cylinder, a water inlet / outlet, a sampling port, a baffle net and an overflow weir. Medicament and wastewater are homogenized in the adjusting tank and then enter the reactor, catalyst filler in the cylinder is fluidized according to a fluidization track formed by the conical guide plate and the central guide cylinder under the driving of the reflux pump, and the mass transfer and reaction efficiency is improved; the silicon-based iron oxide is used as a catalyst filler, so that the addition amount of ferrous iron and hydrogen peroxide is reduced, the agent addition cost is reduced, and the sludge amount is further reduced; and the baffle net is arranged above the cylinder body to intercept the catalyst filler, so that the loss of the catalyst filler is prevented by a simple and efficient method, and the operation cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field, concretely is a kind of high-efficiency fenton fluidized bed reactor. BACKGROUND

[0002] With the continuous improvement of environmental protection requirements and the increasingly prominent water resources problem, fenton fluidized bed technology has broad application prospects in treating refractory organic matter, toxic and harmful substances and persistent organic pollutants.

[0003] Fenton fluidized bed is to make the iron hydroxyl oxide (FeOOH) crystal produced by fenton method or cover on the surface of fluidized bed carrier, which is a kind of advanced oxidation technology combining homogeneous chemical oxidation (H2O2 / Fe2+), heterogeneous chemical oxidation (H2O2 / FeOOH) and fluidized bed crystallization function. By homogeneous Fe2+ and heterogeneous FeOOH two kinds of catalytic ways, H2O2 is catalyzed to produce hydroxyl radical (·OH), and organic matter is oxidized and degraded. The generated FeOOH has the function of catalyzing H2O2, and can be used as the carrier of fluidized bed crystallization.

[0004] The core advantage of fenton fluidized bed technology is that it can effectively improve the utilization rate of reagent and reduce the generation of iron sludge. The structural design of fluidized bed makes the reactants (such as H2O2 and Fe2+) fully contact with wastewater, and enhances the mass transfer effect. The trivalent iron ion (Fe3+) produced by fenton reaction will adhere to the surface of the carrier to form crystal, and reduce the precipitation of iron hydroxide (FeOH3), which can avoid the generation of a large amount of iron sludge in traditional fenton reaction, and improve the reaction efficiency.

[0005] Although fenton fluidized bed has many advantages, it still faces some technical challenges in practical application, such as catalyst fluidization difficulty, uneven fluid distribution in reactor affecting mass transfer effect, large reagent consumption, catalyst easy to flow out and need to be replenished regularly, large reagent consumption and large sludge production. UTILITY MODEL CONTENT

[0006] To solve the problems raised in the above background technology, the purpose of the utility model is to provide a kind of high-efficiency fenton fluidized bed reactor, with the advantages of uniform distribution, solving the problems such as catalyst fluidization difficulty, uneven fluid distribution in reactor affecting mass transfer effect, large reagent consumption, catalyst easy to flow out and need to be replenished regularly, large reagent consumption and large sludge production.

[0007] To achieve the above object, the utility model provides the following technical scheme: an efficient fenton fluidized bed reactor, including the barrel, the barrel below is equipped with fluid distribution, connects the three -way valve, the three -way valve is connected with the reflux pump, reflux pipeline, reflux water outlet in proper order, is equipped with hydrogen peroxide dosing on reflux pipeline; The top of fluid distribution is equipped with conical guide plate, the top of conical guide plate is equipped with center guide cylinder; The inside of barrel has fluidized bed catalyst packing; The lower side of barrel is equipped with water inlet, the upper side of one side is equipped with water outlet, the upper side of other side is equipped with sampling port; After homogenization in the adjusting pool 17, medicament and wastewater enter the reactor; The top of barrel is equipped with the screen, the top of screen is equipped with overflow weir.

[0008] As the utility model is preferred, the barrel height diameter ratio is 5:1.

[0009] As the utility model is preferred, the four fixed columns of screen are 10 cm high, and the spacing from the water outlet is 100 cm.

[0010] As the utility model is preferred, the included angle between conical guide plate 18 and barrel is 30-45 DEG.

[0011] As the utility model is preferred, the diameter of the guide column formed by center guide cylinder is 1 / 2 of the diameter of barrel, and the height is 1 / 2 of the height of barrel, and the normal distance between the lower end of center guide cylinder and conical guide plate 18 is 10-15 cm.

[0012] As the utility model is preferred, the fluidized bed catalyst packing is silicon-based iron oxide, and the particle size is 1-5 mm.

[0013] As the utility model is preferred, the conical guide plate in the barrel optimizes the fluid flow direction, further avoids the generation of dead zone, and improves the processing efficiency. The included angle between conical guide plate and barrel is 30-45 DEG.

[0014] As the utility model is preferred, the reactor is equipped with center guide cylinder, which optimizes the flow path of fluid and ensures uniform fluidization. The diameter of the guide column formed by center guide cylinder is 1 / 2 of the diameter of barrel, and the height is 1 / 2 of the height of barrel, and is in the center of barrel, and the normal distance between the lower end of center guide cylinder and conical guide plate is 10-15 cm.

[0015] As the utility model is preferred, the fluidized bed catalyst packing is silicon-based iron oxide, and the particle size is 1-5 mm, and the addition amount is 1 / 5 of the volume of reactor.

[0016] As the utility model is preferred, the reaction process is monitored, and the pH sensor is installed in the reactor to monitor the pH value in the system in real time, so as to ensure the stability of reaction conditions.

[0017] As preferred by the utility model, the upper part of the cylinder is provided with a blocking net to prevent the catalyst filler from flowing out.

[0018] As preferred by the utility model, the fixed column and the support fix and support the internal components to ensure the stable operation of the equipment.

[0019] Compared with the prior art, the utility model has the beneficial effects as follows:

[0020] 1、The utility model discloses a reactor with high efficiency, because the oxidant, catalyst and organic matter in wastewater can be mass transferred efficiently under the action of the fluidization distributor, the catalyst filler in the cylinder is fluidized along the fluidization track formed by the conical guide plate and the central guide cylinder under the drive of the reflux pump, the mass transfer and reaction efficiency are greatly improved, the silicon-based iron oxide is used as the catalyst filler, the ferrous and hydrogen peroxide dosing amount are reduced, the reagent dosing cost is reduced, and the sludge amount is further reduced, the upper part of the cylinder is provided with a blocking net to intercept the catalyst filler, the catalyst filler overflow is prevented in a simple and efficient way, the operation cost is saved, the problems of catalyst fluidization difficulty, uneven fluid distribution in the reactor affecting the mass transfer effect, large reagent consumption, catalyst easy to flow out and needing to be replenished regularly, large reagent consumption and large sludge production are solved, and the uniform distribution effect is achieved.

[0021] 2、The utility model discloses the design that the ratio of height and diameter of the cylinder is 5:1, so that the space utilization rate in the reactor is higher, and the reaction efficiency is improved.

[0022] 3、The utility model discloses that the fixed column height of the blocking net and the distance interval from the water outlet are reasonable, the stability of the blocking net is guaranteed, and the water outlet is avoided. ACCURACY OF DRAWINGS

[0023] Figure 1 It is the first view whole structure schematic diagram of the utility model;

[0024] Figure 2 It is the second view whole structure schematic diagram of the utility model.

[0025] In the drawing: 1, three-way valve;2, reflux pump;3, reflux pipeline;4, dosing metering pump;5, hydrogen peroxide dosing port;6, reflux water outlet;7, sampling port;8, blocking net;9, fixed column;10, overflow weir;11, water outlet;12, cylinder;13, central guide cylinder;14, support;15, water inlet;16, pH sensor;17, water inlet adjusting pool;18, conical guide plate;19, fluidization distributor;20, fluidized bed catalyst filler. CONCRETE IMPLEMENTATION

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1 to 2 As shown, this utility model provides a high-efficiency Fenton fluidized bed reactor, including a cylindrical body 12. A fluidization distributor 19 is provided below the cylindrical body 12, connected to a three-way valve 1. The three-way valve 1 is sequentially connected to a reflux pump 2, a reflux pipeline 3, and a reflux outlet 6. A hydrogen peroxide dosing port 5 is provided on the reflux pipeline 3. A conical guide plate 18 is provided above the fluidization distributor 19, and a central guide cylinder 13 is provided above the conical guide plate 18. Fluidized bed catalyst packing 20 is provided inside the cylindrical body 12. An inlet 15 is provided at the bottom of one side of the cylindrical body 12, an outlet 11 is provided at the top of one side, and a sampling port 7 is provided at the top of the other side. The reagent and wastewater are homogenized in an equalization tank 17 before entering the reactor. A baffle 8 is provided above the cylindrical body 12, and an overflow weir 10 is provided above the baffle 8.

[0028] refer to Figure 1 The height-to-diameter ratio of the cylinder is 5:1.

[0029] As a technical optimization of this utility model, the design of the cylinder 12 with a height-to-diameter ratio of 5:1 makes the space utilization rate inside the reactor higher, which is conducive to improving the reaction efficiency.

[0030] refer to Figure 1 The four fixed posts 9 of the baffle net 8 are 10 cm high and the distance between them and the outlet 11 is 100 cm.

[0031] As a technical optimization of this utility model, the height of the fixing column 9 of the baffle 8 and the distance from the outlet 11 are reasonably designed, which not only ensures the stability of the baffle 8, but also avoids the impact on the outlet 11.

[0032] refer to Figure 1 The included angle between the conical guide plate 18 and the cylinder 12 is 30-45°.

[0033] As a technical optimization of this utility model, the included angle between the conical guide plate and the cylinder 12 is designed to be between 30-45°, which is conducive to the mixing of wastewater and reagents and improves the reaction efficiency.

[0034] refer to Figure 1The diameter of the flow guide column formed by the central flow guide cylinder 13 is 1 / 2 of the diameter of the cylinder body 12, and the height of the flow guide column is 1 / 2 of the height of the cylinder body 12, and the normal distance between the lower end of the central flow guide cylinder 13 and the conical flow guide plate 18 is 10-15 cm.

[0035] As a technical optimization scheme of the utility model, the diameter and height of the central flow guide cylinder 13 are reasonably designed, so that the wastewater and the reagent can be fully mixed in the flow guide cylinder, and the reaction efficiency is improved. The normal distance between the lower end and the conical flow guide plate is designed to be between 10-15 cm, which is beneficial to the mixing of the wastewater and the reagent.

[0036] Reference Figure 1 The fluidized bed catalyst filler 20 is a silicon-based iron oxide, and the particle size is 1-5 mm.

[0037] As a technical optimization scheme of the utility model, the fluidized bed catalyst filler 20 adopts silicon-based iron oxide, and the particle size is 1-5 mm, which has high catalytic activity and stability, and is beneficial to improving the reaction efficiency.

[0038] The working principle and use process of the utility model are as follows: when in use, the dosing pump 4 respectively adds sulfuric acid and ferrous sulfate to the water inlet adjusting tank 17, adjusts the pH value to 3.0, and then enters the inside of the cylinder body 12 from the water inlet 15. Hydrogen peroxide is introduced through the hydrogen peroxide adding port 5, and is added to the reflux pipeline 3 by the reflux pump 2, and then enters the inside of the reactor through the three-way valve 1, and the circulating water enters the fluidized distributor 19 to generate a huge upward flow, which blows the fluidized bed catalyst filler 20 out of the central flow guide cylinder 13. The fluidized bed catalyst filler 20 rises to a certain height and then falls outside the central flow guide cylinder 13, is guided by the conical flow guide plate 18 to re-enter the bottom of the central flow guide cylinder 13, and then flows to a high place again through the central flow guide cylinder 13 under the action of the fluidized distributor 19, and forms a fluidized state. The hydrogen peroxide in the wastewater forms a hydroxyl radical with strong oxidizing property under the catalysis of divalent iron, and organic matter is oxidized and decomposed. The high-intensity fluidized state strengthens the mass transfer effect of hydrogen peroxide and divalent iron, and accelerates the oxidation reaction of the hydroxyl radical and the organic matter, and then returns to the fluidized bed reactor through the reflux pipeline 3, and the rest is discharged through the overflow weir 10 and the water outlet 11.

[0039] In summary: the high-efficiency Fenton fluidized bed reactor, by setting under the action of fluid distribution device 19 in wastewater oxidant, catalyst and organic matter can be efficient mass transfer, therefore the reactor has high efficiency;Catalyst packing in the cylinder 12 under the drive of reflux pump 2 according to the conical guide plate 18 and center guide cylinder 13 flow trajectory fluidization, mass transfer and reaction efficiency is greatly improved, using silicon-based iron oxide as catalyst packing, so that the ferrous and hydrogen peroxide dosage reduction, reduce the cost of reagent addition, and further reduce the sludge amount;The upper portion of the cylinder 12 is provided with a screen 8, which traps the catalyst packing, prevents the catalyst packing from overflowing in a simple and efficient manner, saves operating costs, and solves the problems of catalyst fluidization difficulty, uneven fluid distribution in the reactor affecting mass transfer effect, large reagent consumption, catalyst loss and the need for regular replenishment, large reagent consumption, and large sludge production.

[0040] It should be noted that in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high efficiency Fenton fluidized bed reactor comprising a cylinder (12), characterized in that: The lower part of the cylinder (12) is provided with a fluidization distributor (19) connected with a three-way valve (1), the three-way valve (1) is connected with a reflux pump (2), a reflux pipeline (3) and a reflux water outlet (6) in sequence, the reflux pipeline (3) is provided with a hydrogen peroxide adding port (5); the upper part of the fluidization distributor (19) is provided with a conical guide plate (18), the upper part of the conical guide plate (18) is provided with a central guide cylinder (13); the inside of the cylinder (12) is provided with fluidized bed catalyst fillers (20); the lower part of one side of the cylinder (12) is provided with a water inlet (15), the upper part of one side of the cylinder (12) is provided with a water outlet (11), and the upper part of the other side of the cylinder (12) is provided with a sampling port (7); the medicament and wastewater are homogenized in the adjusting tank (17) and then enter the reactor; the upper part of the cylinder (12) is provided with a blocking net (8), and the upper part of the blocking net (8) is provided with an overflow weir (10).

2. A high efficiency Fenton fluidized bed reactor according to claim 1, characterized in that: The height-diameter ratio of the cylinder (12) is 5:

1.

3. The high efficiency Fenton fluidized bed reactor according to claim 1, characterized in that: The four fixed columns (9) of the blocking net (8) are 10 cm high, and the distance between the fixed columns (9) and the water outlet (11) is 100 cm.

4. The high efficiency Fenton fluidized bed reactor according to claim 1, characterized in that: The included angle between the conical guide plate (18) and the cylinder (12) is 30-45°.

5. The high efficiency Fenton fluidized bed reactor according to claim 1, characterized in that: The diameter of the guide column formed by the central guide cylinder (13) is 1 / 2 of the diameter of the cylinder (12), and the height of the guide column is 1 / 2 of the height of the cylinder (12), and the normal distance between the lower end of the central guide cylinder (13) and the conical guide plate (18) is 10-15 cm.

6. The high efficiency Fenton fluidized bed reactor according to claim 1, characterized in that: The fluidized bed catalyst fillers (20) are silicon-based iron oxides, and the particle size is 1-5 mm.

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