Reaction device and Fenton reaction device thereof

Abstract

The utility model relates to a reaction device and a Fenton reaction device thereof. The reaction device comprises a reaction chamber and a flow guide pipe, the flow guide pipe is arranged in the reaction chamber and comprises a feeding hole formed in the upper end of the flow guide pipe, a discharging hole formed in the lower end of the flow guide pipe and a spiral structure arranged in the flow guide pipe. A plurality of to-be-reacted substances flow down along the spiral structure arranged in the flow guide pipe through the feed port at the upper end of the flow guide pipe under the action of gravity, are quickly and fully premixed on the spiral structure of the flow guide pipe, flow into the reaction chamber through the discharge port at the lower end of the flow guide pipe, and are fully and uniformly mixed with other to-be-reacted substances in the reaction chamber. According to the reaction device provided by the utility model, various reactants are quickly and fully premixed and remixed, and the reaction efficiency is economically and conveniently improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of reaction devices, in particular to a reaction device and a Fenton reaction device thereof. Background Art

[0002] In the process of chemical reaction, various reactants need to be fully mixed to improve reaction efficiency and shorten reaction time. Taking the Fenton method for treating sewage as an example, the Fenton method uses ferrous ions to catalyze the decomposition of hydrogen peroxide as a Fenton reaction agent to produce hydroxyl radicals (·OH). Hydroxyl radicals have a strong tendency to pair electrons and are highly reactive with various organic matter in sewage. In the Fenton method, the iron catalyst is dissolved in the aqueous phase with hydrogen peroxide and pollutants and reacts directly; during the reaction, the more fully the iron catalyst is pre-mixed with hydrogen peroxide, the more hydroxyl radicals the iron catalyst can stimulate hydrogen peroxide to produce; at the same time, the more fully the hydroxyl radicals produced can contact with pollutants, the more fully the hydroxyl radicals react with organic pollutants, the less ineffective quenching of hydroxyl radicals is, and the more efficient utilization of hydroxyl radicals is achieved. Therefore, when treating sewage with the Fenton method, the iron catalyst, hydrogen peroxide, and pollutants should be quickly and fully mixed and fully contacted to optimize the reaction effect, produce more effective hydroxyl radicals, oxidize the difficult-to-degrade organic matter in sewage, shorten the reaction time, and improve the degradation efficiency of organic pollutants.

[0003] In the prior art, the Fenton reaction reagent is added to the Fenton reaction device through a dosing pump, resulting in a high local concentration in the reaction device, a long reaction time, and a low reaction efficiency. In addition, the reaction device requires external power to achieve the purpose of mixing the Fenton reagent evenly, which consumes too much energy. Moreover, with simple mechanical stirring, the mixing efficiency of the Fenton reaction reagent in the reaction device is too low, and the rate of generating hydroxyl radicals is slow.

[0004] Therefore, how to provide a reaction device that allows various reactants to be quickly and fully pre-mixed and re-mixed, and economically and conveniently improve the reaction efficiency is a technical problem that needs to be solved urgently in this field. Utility Model Content

[0005] In order to solve at least one of the above technical problems, the utility model provides a reaction device, comprising: a reaction chamber and a flow guide pipe;

[0006] The flow guide pipe is arranged in the reaction chamber, and comprises: a feed port arranged at the upper end of the flow guide pipe, a discharge port arranged at the lower end of the flow guide pipe, and a spiral structure arranged in the flow guide pipe.

[0007] Furthermore, a guide cone is arranged at the lower end of the discharge port, and the premixed reactants flow out along the conical surface of the guide cone.

[0008] Furthermore, the guide cone is a cone with a circular cross section at the bottom, and the diameter of the circular cross section is larger than the diameter of the guide pipe.

[0009] Further, the flow guiding cone is a solid cone, and a number of flow guiding holes are provided on the cone surface; a necking is provided below the flow guiding pipe, and the outlet diameter of the necking is smaller than the pipe diameter of the flow guiding pipe.

[0010] Further, the flow guiding pipe further includes a solid column, and the spiral structure is connected around the solid column.

[0011] Further, the solid column is arranged in the center of the spiral structure, one end of the spiral structure surrounds the solid column, and the other end is arranged on the inner wall of the flow guiding pipe.

[0012] Further, the spiral structure is provided with a convex portion.

[0013] Further, the reaction device further includes an aeration assembly, and the aeration assembly is arranged at the bottom of the reaction chamber.

[0014] A Fenton reaction device includes the reaction device described in any one of the above; the feed inlet of the reaction device is used for introducing Fenton influent, ferrous sulfate and hydrogen peroxide.

[0015] A Fenton reaction device is used for water pollution treatment.

[0016] In this embodiment, a reaction device is provided. A number of reactants to be reacted enter through the upper feed inlet of the flow guiding pipe and flow down along the spiral structure arranged in the flow guiding pipe under the action of gravity, and are quickly and fully premixed on the spiral structure of the flow guiding pipe, and then flow into the reaction chamber through the discharge outlet at the lower end of the flow guiding pipe and are fully mixed with other reactants to be reacted in the reaction chamber. The reaction device provided by the utility model enables various reactants to be quickly and fully premixed and remixed, and economically and conveniently improves the reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the structures shown in these drawings without creative efforts. In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale.

[0018] Figure 1 It is a schematic diagram of an embodiment of a reaction device of the present utility model;

[0019] Figure 2 It is a schematic diagram of an embodiment of the flow guiding pipe of a reaction device of the present utility model;

[0020] Figure 3Schematic diagram of an embodiment of the flow guide cone of a reaction device of the present utility model;

[0021] Figure 4 Schematic diagram of an embodiment of a Fenton reaction device of the present utility model. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present utility model.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0024] It should also be noted that if there are directional indications in the embodiments of the present utility model, such as up, down, left, right, front, back..., then the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. In addition, if there are descriptions such as "first, second", "S1, S2", "step one, step two" in the embodiments of the present utility model, then such descriptions are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features or indicating the execution order of the method. Those skilled in the art can understand that all those that do not violate the key points of the present utility model under the technical concept of the utility model should be included in the protection scope of the present utility model.

[0025] The present utility model provides a reaction device, referring to Figure 1 and Figure 2 , including: a reaction chamber 1 and a flow guide pipe 2;

[0026] The flow guide pipe 2 is arranged in the reaction chamber and includes: a feed port 21 arranged at the upper end of the flow guide pipe, a discharge port 22 arranged at the lower end of the flow guide pipe, and a spiral structure 23 arranged inside the flow guide pipe.

[0027] In this embodiment, a reaction device is provided. Reactants to be reacted, such as several chemical reagents, enter through the upper feed port of the diversion pipe and flow along the spiral structure arranged in the diversion pipe under the action of gravity. On the one hand, this spiral structure increases the falling time of the reactants, thereby improving the mixing time of each reactant; on the other hand, it can continuously mix each reactant to achieve an automatic stirring effect; enabling each reactant to be quickly and fully premixed on the spiral structure of the diversion pipe, and then flowing into the reaction chamber through the discharge port at the lower end of the diversion pipe, so that the reactants to be reacted in the reaction chamber are fully mixed. The reaction device provided by the present utility model does not require external power. Under the action of its own gravity, combined with the built-in spiral structure and the surrounding reaction chamber, it can quickly and fully premix and remix various reactants, economically and conveniently improving the reaction efficiency, avoiding problems such as high local concentration, long reaction time, and low reaction efficiency in the reaction device, improving the mixing effect, and thus improving the reaction effect.

[0028] Specifically, the shapes, sizes, dimensions, and materials of the reaction chamber 1 and the diversion pipe 2 can be arbitrarily set by those skilled in the art.

[0029] Preferably, the diversion pipe 2 is arranged in the center of the reaction chamber 1; the feed port 21 is higher than the upper plane of the reaction chamber 1; the discharge port 22 is 10 - 50 cm away from the bottom of the reaction chamber 1; more preferably, the distance between the feed port 21 and the discharge port 22 exceeds 100 cm. In this embodiment, several examples of the diversion pipe, feed port, and discharge port are given, but not limited thereto. The distance between the discharge port of the diversion pipe and the bottom of the reaction chamber is 10 - 50 cm to prevent the bubbles generated by the subsequent aeration component and the liquid in the reaction chamber from flowing back through the discharge port; the distance between the feed port and the discharge port exceeds 100 cm to ensure that the reactants to be mixed have a sufficient mixing path length for mixing to achieve a better premixing effect.

[0030] Preferably, the spiral structure 23 is arranged along the inner wall of the diversion pipe. More preferably, the spiral structure 23 is provided with a convex portion 23a. When the reactants to be mixed flow on the spiral structure, it can enhance the fluid disturbance, making the premixing effect of the reactants to be mixed better and the mixing more uniform. It should be noted that the number, shape, and spacing of the convex portions on the spiral structure can be arbitrarily set by those skilled in the art according to needs, not limited by the drawings.

[0031] Preferably, referring to Figure 2 , a diversion cone 24 is further provided at the lower end of the discharge port 22.

[0032] In this embodiment, a flow guiding cone is added at the lower end of the discharge port. The pre-mixed reactants to be reacted flow out along the conical surface of the flow guiding cone. The conical structure enables the mixed reactant solution to diffuse in all directions in the reaction chamber to ensure that the pre-mixed reactants are in full contact with the reactants in the reaction chamber. During the remixing process, the reactants in the reaction chamber are fully mixed with the pre-mixed reactants. More preferably, the flow guiding cone is a cone with a circular cross-section at the bottom, and the diameter of the circular cross-section is larger than the diameter of the flow guiding pipe. Since the flow guiding cone is a cone and the circular cross-section at the bottom is larger than the diameter of the flow guiding pipe, the diffusion range of the pre-mixed reactants to be reacted can be greatly increased.

[0033] More preferably, referring to Figure 3 , the flow guiding cone is a solid cone, and a number of flow guiding holes 241 are provided on the conical surface.

[0034] In this embodiment, the flow guiding cone is set as a solid cone, which improves the structural strength of the flow guiding cone itself, prevents the flow guiding cone from deforming, and improves the service life of the flow guiding cone. At this time, the reactants to be reacted flow out along the conical surface of the flow guiding cone and uniformly diffuse into the reaction chamber along the conical surface, achieving a better uniform diffusion effect. A number of flow guiding holes are provided on the conical surface of the flow guiding cone, so that the reactants to be reacted can not only diffuse and flow into the lower reaction chamber along the conical surface of the flow guiding cone, but also flow into the lower reaction chamber through the flow guiding holes provided on the conical surface, greatly improving the diffusion speed of the reactants to be reacted. More preferably, the flow guiding holes are through holes perpendicular up and down to improve the outflow speed of the reactants to be reacted. More preferably, referring to Figure 3 , a necking 242 is provided below the flow guiding pipe, and the outlet diameter of the necking 242 is smaller than the pipe diameter of the flow guiding pipe. Adding a necking below the flow guiding pipe can prevent the reactants to be reacted from spreading after rotating through the spiral structure, enabling the reactants to be reacted to gather better and flow towards the lower flow guiding cone. More specifically, referring to Figure 3 , a necking 242 is provided below the flow guiding pipe, and the outlet diameter of the necking 242 is smaller than the diameter of the flow guiding pipe. The flow guiding cone below the flow guiding pipe is connected to the flow guiding pipe through a connecting member 243. The flow guiding cone is a solid cone, and a number of flow guiding holes 241 are provided on the conical surface of the flow guiding cone. The flow guiding holes 241 are through holes perpendicular up and down. The reactants to be reacted flow out after rotating through the spiral structure in the flow guiding pipe. Since the outlet diameter of the necking is smaller than the diameter of the flow guiding pipe, the reactants to be reacted gather through the necking and then flow out through the outlet of the necking and fall onto the flow guiding cone. The reactants to be reacted uniformly diffuse along the conical surface of the flow guiding cone. Part of the reactants to be reacted flow into the lower reaction chamber through the conical surface of the flow guiding cone, and the other part of the reactants to be reacted flow into the lower reaction chamber through the flow guiding holes of the flow guiding cone, improving the diffusion speed of the reactants. For example, the connecting member 243 is a number of steel bars evenly distributed around the lower part of the flow guiding pipe to improve the connection strength between the flow guiding cone and the flow guiding pipe and the stability of the reaction device.

[0035] Preferably, the flow guiding pipe 2 further includes a solid column 25, and the spiral structure 23 is connected around the solid column 25.

[0036] In this embodiment, a solid column is added to the flow guide tube, and the spiral structure is connected and arranged around the solid column. On the one hand, it plays a role in supporting the spiral structure, preventing the spiral structure from being deformed, and improving the service life of the reaction device; on the other hand, the existence of the solid column allows the reactants to be mixed to be mixed along the outside of the spiral structure as much as possible, rather than in the middle of the flow guide tube, extending the length of the mixing section of the reactants in the premixing, and strengthening the mixing effect. More preferably, the solid column is arranged in the center of the spiral structure, and one end of the spiral structure surrounds the solid column, and the other end is arranged on the inner wall of the flow guide tube, so as to further enhance the structural strength of the reaction device, prevent the reaction device from being deformed, and improve the service life of the reaction device.

[0037] Preferably, the spiral structure is a spiral surface extending downward along the conduit, and the spiral angle of the spiral surface is between 30-60 degrees, so as to ensure that the reactants to be mixed are premixed in the closed spiral channel formed by the spiral surface of the spiral structure and the guide tube, thereby achieving a better premixing effect; the spiral angle is set between 30-60 degrees, which can ensure that the premixed reactants can have a suitable flow speed under the action of gravity, and at the same time have sufficient flow length, so that the premixing effect of the reactants to be mixed is better.

[0038] Preferably, the reaction device further comprises an aeration component 3 , and the aeration component 3 is arranged at the bottom of the reaction chamber 1 .

[0039] In this embodiment, the reaction device is provided with an aeration component at the bottom of the reaction chamber, so that the reactants in the reaction chamber can be convected at high speed, so that the pre-mixed reactants can be fully contacted and mixed when mixed with the reagents in the reaction chamber below, so that the concentration of the mixed solution in the reaction chamber can be quickly homogenized, thereby improving the chemical reaction rate. Moreover, in the oxidation reaction requiring the participation of oxygen, the high-speed convection generated by the aeration component simultaneously cuts and crushes the air into tiny bubbles, so that the mixed solution and the microbubbles are fully mixed and contacted, thereby enhancing the oxygen transfer efficiency. Optionally, the aeration component includes a blower, an air delivery pipeline and an aerator, and the aerator can be a microporous diffuser, a medium bubble diffuser, a large bubble diffuser, etc. The aerator is used to increase the bubbles generated by aeration and generate more high-speed convection; the aeration component is used to fill the reaction chamber with air of a certain pressure, so that the reactants in the reaction chamber form high-speed convection, so that the mixed solution in the reaction chamber can be fully contacted and mixed. More preferably, the guide tube is arranged in the center of the reaction chamber, and the aeration assembly is arranged below the discharge port of the guide tube; the reactants premixed in the guide tube can flow out through the discharge port and then be quickly remixed with the reactants in the reaction chamber under the action of the aeration assembly, thereby improving the remixing rate.

[0040] On the other hand, the utility model also provides a Fenton reaction device, referring to Figure 4, including any of the above reaction devices; the feed inlet 21 of the reaction device is used to introduce Fenton influent, ferrous sulfate and hydrogen peroxide.

[0041] The utility model provides a Fenton reaction device, which injects the Fenton influent after adjusting the pH value, ferrous sulfate solution and hydrogen peroxide solution into the feed inlet of the diversion pipe according to a certain ratio; under the action of gravity, the Fenton influent, ferrous sulfate solution and hydrogen peroxide are fully premixed along the spiral structure inside the diversion pipe, generating a large number of hydroxyl radicals, and flowing into the reaction chamber through the discharge port at the lower end of the diversion pipe; the reactants in the reaction chamber, such as the sewage to be purified, are remixed with the Fenton influent, ferrous sulfate solution and hydrogen peroxide solution, and in the mixed solution, the hydroxyl radicals are in full contact with the reactants. The solution concentration in the reaction device is quickly mixed evenly, avoiding the situation of too high local concentration; moreover, the reaction device uses gravity mixing, which saves energy and reduces consumption, greatly simplifies the structure and is convenient for later maintenance; furthermore, the reaction device uses the structure of an internal spiral structure diversion pipe and an external reaction chamber for full premixing and remixing, greatly improving the generation rate and utilization rate of hydroxyl radicals, efficiently degrading refractory organic matter, reducing the Fenton reaction time, saving Fenton agents and avoiding waste of agents. For example, the Fenton reaction device is used for water pollution treatment; the sewage is placed in the reaction chamber, and under the action of gravity, the Fenton influent, ferrous sulfate solution and hydrogen peroxide are fully premixed along the spiral structure inside the diversion pipe, generating a large number of hydroxyl radicals, and flowing into the reaction chamber through the discharge port at the lower end of the diversion pipe, and the hydroxyl radicals are in full contact with the refractory organic matter in the sewage to complete the degradation of the organic matter and achieve the purpose of sewage treatment.

[0042] The above Fenton reaction device is created based on the above reaction device, and the combination of its technical effects and technical features will not be elaborated here. The above embodiments only represent several implementation modes of the utility model, and the description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the utility model.

Claims

1. A reaction device, characterized in that, Comprising: A reaction chamber and a draft tube; The draft tube is arranged in the reaction chamber and includes: a feed inlet arranged at the upper end of the draft tube, a discharge outlet arranged at the lower end of the draft tube, and a spiral structure arranged inside the draft tube.

2. The reaction device according to claim 1, characterized in that, A draft cone is arranged at the lower end of the discharge outlet, and the pre-mixed reactants to be reacted flow out along the conical surface of the draft cone.

3. The reaction device according to claim 2, characterized in that, The draft cone is a conical body, with a circular cross-section at the bottom, and the diameter of the circular cross-section is larger than the diameter of the draft tube.

4. The reaction device according to claim 2, characterized in that The draft cone is a solid cone, and a number of draft holes are arranged on the conical surface; a constriction is arranged below the draft tube, and the outlet diameter of the constriction is smaller than the tube diameter of the draft tube.

5. The reaction device according to claim 1, characterized in that, The draft tube further includes a solid column, and the spiral structure is connected around the solid column.

6. The reaction device according to claim 5, characterized in that, The solid column is arranged in the center of the spiral structure. One end of the spiral structure surrounds the solid column, and the other end is arranged on the inner wall of the draft tube.

7. The reaction device according to claim 1, characterized in that, Protruding portions are arranged on the spiral structure.

8. The reaction device according to claim 1, characterized in that, It further includes an aeration assembly, and the aeration assembly is arranged at the bottom of the reaction chamber.

9. A Fenton reaction device, characterized in that, Comprising the reaction device according to any one of claims 1-8; the feed inlet of the reaction device is used to introduce Fenton influent, ferrous sulfate and hydrogen peroxide.

10. The Fenton reaction device according to claim 9, characterized in that, For water pollution treatment.

Images