High-pressure catalytic oxidation reaction device

Abstract

The high-pressure catalytic oxidation reaction device comprises an oxidation tank and an ozone generator, the oxidation tank comprises a tank body, an air inlet pipe is arranged on one side of the lower portion of the tank body, and a water inlet pipe is arranged on the other side of the tank body; a catalyst layer is arranged in the tank body; a pressure maintaining structure is arranged on one side of the pressure gauge and comprises a connecting pipe, one side of the connecting pipe is communicated with an air outlet pipe, a top plug is slidably installed in the connecting pipe, the upper portion of the top plug is connected with a spring, and an end plate is arranged at the top of the connecting pipe. A drain pipe is arranged at the upper part of the tank body; an induced draft fan is arranged on one side of the ozone generator, an air inducing pipe of the induced draft fan is connected with the ozone generator, and an air outlet pipe of the induced draft fan is connected with the air inlet pipe; and a one-way valve is arranged on the air outlet pipe. The pressure maintaining structure is arranged at the upper part of the tank body, so that positive pressure is kept in the tank body, the oxidation reaction efficiency of sewage and ozone is improved, the dosage of an oxidizing agent is remarkably reduced, and the production cost is reduced.

Description

Technical Field

[0001] The invention belongs to the field of sewage treatment, and in particular relates to a high-pressure catalytic oxidation reaction device. Background Art

[0002] In the current sewage treatment field, deep oxidation treatment is one of the important means to improve water quality and remove refractory organic matter. Among them, ozone oxidation and Fenton oxidation technology are widely used in the treatment of various types of sewage due to their wide applicability and relatively mature technical system. However, these two technologies face a common challenge in practical application, that is, they are both carried out under normal pressure conditions, resulting in limited oxidation efficiency, making it difficult to meet the increasingly stringent environmental emission standards and the needs of high-efficiency treatment, which is specifically reflected in:

[0003] Ozone oxidation technology produces highly oxidizing hydroxyl radicals by decomposing ozone molecules in water, which can effectively destroy the structure of organic matter, thereby achieving the purpose of oxidative decomposition of pollutants. However, under normal pressure conditions, the solubility of ozone molecules in water is low, and the mass transfer efficiency is not high, which limits the full play of its oxidation capacity. In addition, the oxidation reaction rate of ozone is limited by the contact area and contact time between the reactants, which further restricts the improvement of oxidation efficiency.

[0004] The Fenton oxidation technology relies on the strong oxidizing property of the Fenton reagent (mainly composed of ferrous ions and hydrogen peroxide) to gradually oxidize organic macromolecules into small molecules, and finally convert them into carbon dioxide and water. Although the Fenton oxidation technology has the advantages of stable treatment effect and relatively low cost, it is also limited by the reaction conditions. When carried out under normal pressure, the decomposition rate of hydrogen peroxide and the catalytic efficiency of ferrous ions are difficult to achieve the optimal level, resulting in low overall oxidation efficiency, and a large amount of iron sludge may be generated during the treatment process, which increases the difficulty and cost of subsequent treatment. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a high-pressure catalytic oxidation reaction device, which aims to promote the decomposition and mass transfer efficiency of the oxidant by increasing the pressure of the reaction system, while enhancing the activity of the catalyst, thereby significantly improving the deep oxidation treatment efficiency of sewage.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A high-pressure catalytic oxidation reaction device comprises an oxidation tank and an ozone generator, wherein the oxidation tank comprises a tank body, an air inlet pipe is arranged on one side of the lower part of the tank body, and a water inlet pipe is arranged on the other side of the tank body; a catalyst layer is arranged inside the tank body; a pressure gauge is arranged on the upper part of the tank body, and a pressure maintaining structure is arranged on one side of the pressure gauge, and the pressure maintaining structure comprises a connecting pipe, one side of the connecting pipe is connected with an air outlet pipe, a top plug is slidably installed inside the connecting pipe, a spring is connected to the upper part of the top plug, an end plate is arranged on the top of the connecting pipe, and one end of the spring is abutted against the end plate; a drain pipe is arranged on the upper part of the tank body, the drain pipe is located on the upper part of the catalyst layer, and a first sewage pipe is arranged at the bottom of the tank body; an induced draft fan is arranged on one side of the ozone generator, the induced draft fan of the induced draft fan is connected to the ozone generator, and the air outlet pipe of the induced draft fan is connected to the air inlet pipe; a one-way valve is arranged on the air outlet pipe.

[0008] Furthermore, the end plate is threadedly connected to the inner wall of the connecting pipe, and a safety valve is provided on the upper part of the tank body.

[0009] Furthermore, a plurality of concentrically arranged coils are provided on one side of the water inlet pipe, adjacent coils are connected by a plurality of connecting pipes, and a water leakage hole is provided at the bottom of the coils.

[0010] Furthermore, one end of the air inlet pipe is connected to an air distribution plate, and the air distribution plate is provided with a plurality of evenly arranged air distribution holes.

[0011] Furthermore, a rotary joint is provided at one end of the air inlet pipe, the air distribution plate is rotatably connected to the rotary joint, and a rotating shaft is fixedly connected to the middle of the air distribution plate; a driving mechanism is provided on the upper part of the tank body, and the driving mechanism includes a driving box, a driving motor is installed on the upper part of the driving box, and the output shaft of the driving motor is connected to the rotating shaft.

[0012] Furthermore, the driving mechanism also includes a crankshaft rotatably connected to the driving box, one end of the crankshaft is connected to the driving motor, a connecting rod is movably connected to the crankshaft, a guide rail is fixedly connected to the upper part of the tank body, a rack is slidably connected to the guide rail, one end of the rack is pivotally connected to the end of the connecting rod, and a gear is fixedly connected to the upper end of the rotating shaft, and the gear is meshed with the rack.

[0013] Furthermore, the air distribution disk is provided with a plurality of blades.

[0014] Furthermore, a plurality of turbulence plates are provided on the inner wall of the tank.

[0015] Furthermore, a jacket is provided on the outside of the tank body, a heat exchange medium inlet is provided on the upper part of the jacket, and a heat exchange medium outlet is provided on the lower part of the jacket.

[0016] Further, two groups of buffer tanks are provided on one side of the oxidation tank, a filter screen is provided inside the buffer tank, a water inlet branch pipe is provided at the lower part of the filter screen, the two water inlet branches are connected by a water inlet main pipe, a water outlet branch pipe is provided at the upper part of the filter screen, the two water outlet branches are connected by a water outlet main pipe, and valves are provided on the water inlet branch pipe and the water outlet branch pipe; a second sewage pipe is provided at the lower part of the oxidation tank;

[0017] It also includes at least two pump groups, which are connected in series. The water outlet main pipe of the buffer tank is connected to the water inlet of the pump group. The water outlet of the pump group is connected to a water outlet pipe, and the water outlet pipe is connected to the water inlet pipe of the tank body.

[0018] The beneficial effects of the present invention are:

[0019] 1) The present invention provides a pressure maintaining structure on the upper part of the tank body to maintain a positive pressure inside the tank body, which not only improves the oxidation reaction efficiency of sewage and ozone, but also significantly reduces the amount of oxidant used and reduces production costs.

[0020] 2) The end plate is threadedly connected to the inner wall of the connecting pipe, which is convenient for adjusting the preload force of the spring on the top plug, thereby adjusting the reaction pressure inside the oxidation tank; a safety valve is also provided on the upper part of the tank body to avoid damage to the tank body due to excessive internal pressure of the tank body.

[0021] 3) A number of concentrically arranged coils are provided on one side of the water inlet pipe. After the sewage enters the coils from the water inlet pipe, it flows evenly from the inside of the tank, ensuring the uniformity of the contact reaction between ozone and sewage.

[0022] 4) One end of the air inlet pipe is connected to an air distribution plate to ensure the uniform distribution of ozone in the oxidation tank.

[0023] 5) The air distribution plate is rotatably connected to the air inlet pipe through a rotary joint, and a rotating shaft is fixedly connected to the middle of the air distribution plate; a driving mechanism is provided on the upper part of the tank body, and the driving mechanism drives the rotating shaft to circulate forward and reverse, further ensuring the uniformity of ozone distribution in the tank body.

[0024] 6) There are several blades on the air distribution disk, which stir the sewage and ozone, further accelerating the efficiency of sewage oxidation treatment; there are several interference flow plates on the inner wall of the tank body to prevent the sewage from forming vortexes inside the tank body when the air distribution disk rotates.

[0025] 7) A jacket is provided outside the tank body, a heat exchange medium inlet is provided at the upper part of the jacket, and a heat exchange medium outlet is provided at the lower part of the jacket, so as to facilitate the adjustment of the reaction temperature inside the oxidation tank to improve the efficiency of sewage oxidation treatment.

[0026] 8) Two groups of buffer tanks are provided on one side of the oxidation tank. Both groups of buffer tanks are equipped with filter screens to pre-filter the sewage, thus ensuring the effect of sewage oxidation treatment. The two groups of buffer tanks are used in one and standby respectively, which is convenient for cleaning the filter screen without stopping the machine. By setting up multiple pump groups connected in series, the lift of the pump group is improved, ensuring that the sewage can be smoothly pumped into the oxidation tank for oxidation treatment under positive pressure of the tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attached Figure 1 It is a structural schematic diagram of a high-pressure catalytic oxidation reaction device of the present invention.

[0028] Attached Figure 2 It is a schematic diagram of an ozone generator in a high-pressure catalytic oxidation reaction device of the present invention.

[0029] Attached Figure 3 It is a schematic diagram of the interior of an oxidation tank in a high-pressure catalytic oxidation reaction device of the present invention.

[0030] Attached Figure 4 It is a schematic diagram of a gas distribution plate in a high-pressure catalytic oxidation reaction device of the present invention.

[0031] Attached Figure 5 It is a schematic diagram of a water inlet pipe in a high-pressure catalytic oxidation reaction device of the present invention.

[0032] Attached Figure 6 It is a schematic diagram of the interior of a drive box in a high-pressure catalytic oxidation reaction device of the present invention.

[0033] Attached Figure 7 The present invention discloses a cross-sectional view of an air outlet pipe in a high-pressure catalytic oxidation reaction device.

[0034] Attached Figure 8 It is a schematic diagram of a buffer tank in a high-pressure catalytic oxidation reaction device of the present invention.

[0035] Attached Fig. 9 It is a schematic diagram of the interior of a buffer tank in a high-pressure catalytic oxidation reaction device of the present invention.

[0036] In the figure, 1, oxidation tank; 11, tank body; 111, spoiler; 12, jacket; 121, heat exchange medium inlet; 122, heat exchange medium outlet; 13, air inlet pipe; 131, rotary joint; 132, air distribution plate; 133, blades; 134, shaft; 135, gear; 14, air outlet pipe; 141, connecting pipe; 142, spring; 143, end plate; 144, top plug; 15, water inlet pipe; 151, coil; 152, connecting pipe; 16, drain pipe; 17, catalyst Layer; 18, pressure gauge; 19, safety valve; 2, driving mechanism; 21, driving box; 22, driving motor; 23, crankshaft; 24, connecting rod; 25, rack; 26, guide rail; 3, ozone generator; 31, induced draft fan; 32, induced draft duct; 33, outlet duct; 34, one-way valve; 4, buffer tank; 41, water inlet main pipe; 411, water inlet branch pipe; 412, water outlet branch pipe; 43, filter screen; 44, second sewage pipe; 45, water outlet main pipe; 46, pump group; 47, water outlet pipe. DETAILED DESCRIPTION

[0037] The following will be combined with the attached Figure 1-Figure 9 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] like Figure 1 As shown, a high-pressure catalytic oxidation reaction device includes an oxidation tank 1 and an ozone generator 3, as shown in FIG. Figure 3 As shown, the oxidation tank 1 includes a tank body 11, an air inlet pipe 13 is provided on one side of the lower part of the tank body 11, and a water inlet pipe 15 is provided on the other side of the tank body 11; a catalyst layer 17 is provided inside the tank body 11, and the catalyst layer 17 uses a high-efficiency catalyst (such as metal oxides, precious metal catalysts, etc.) to accelerate the oxidation reaction process and reduce the amount of oxidant used; a pressure gauge 18 is provided on the upper part of the tank body 11, and a pressure maintaining structure is provided on one side of the pressure gauge 18, such as Figure 7As shown, the pressure maintaining structure includes a connecting pipe 141, one side of which is connected to the air outlet pipe 14, a top plug 144 is slidably installed inside the connecting pipe 141, and a spring 142 is connected to the top of the top plug 144. An end plate 143 is provided on the top of the connecting pipe 141, and one end of the spring 142 is against the end plate 143. After ozone enters the tank body 11, when the pressure in the tank is less than the elastic force of the spring 142, the top plug 144 blocks the connecting pipe 141, so that the inside of the tank body 11 maintains a positive pressure, which not only improves the oxidation reaction efficiency of sewage and ozone, but also significantly reduces the amount of oxidant used and reduces production costs. When the internal pressure of the tank body 11 is greater than the elastic force of the spring 142, the top plug 144 is pushed open, and the ozone in the tank is discharged from the air outlet pipe 14 for tail gas treatment. A drain pipe 16 is provided on the upper part of the tank body 11, and the drain pipe 16 is located on the upper part of the catalyst layer 17. A first sewage pipe is provided at the bottom of the tank body 11; as shown Figure 2 As shown, an induced draft fan 31 is provided on one side of the ozone generator 3, an induced draft pipe 32 of the induced draft fan 31 is connected to the ozone generator 3, and an outlet pipe 33 of the induced draft fan 31 is connected to the air inlet pipe 13; a one-way valve 34 is provided on the outlet pipe 33 to prevent sewage from flowing back into the ozone generator 3.

[0040] like Figure 7 As shown, the end plate 143 is threadedly connected to the inner wall of the connecting pipe 141, which is convenient for adjusting the pre-tightening force of the spring 142 on the top plug 144, thereby adjusting the reaction pressure inside the oxidation tank 1; a safety valve 19 is provided on the upper part of the tank body 11 to avoid damage to the tank body 11 due to excessive internal pressure of the tank body 11.

[0041] like Figure 5 As shown, a plurality of concentrically arranged coils 151 are provided on one side of the water inlet pipe 15, and adjacent coils 151 are connected by a plurality of connecting pipes 152. A water leakage hole is provided at the bottom of the coils 151. After the sewage enters the coils 151 from the water inlet pipe 15, it flows down evenly from the inside of the tank body 11, thereby ensuring the uniformity of the contact reaction between ozone and sewage.

[0042] like Figure 4 As shown, one end of the air inlet pipe 13 is connected to an air distribution plate 132 , and the air distribution plate 132 is provided with a plurality of evenly arranged air distribution holes, thereby ensuring the uniform distribution of ozone in the oxidation tank 1 .

[0043] like Figure 2 As shown, a rotary joint 131 is provided at one end of the air inlet pipe 13, and the air distribution plate 132 is rotatably connected to the rotary joint 131. Figure 4 As shown, the middle of the air distribution plate 132 is fixedly connected with a rotating shaft 134; Figure 6As shown, a driving mechanism 2 is provided on the upper part of the tank body 11, and the driving mechanism 2 includes a driving box 21. A driving motor 22 is installed on the upper part of the driving box 21. The output shaft of the driving motor 22 is connected to the rotating shaft 134. The driving motor 22 is used to drive the air distribution plate 132 to rotate, thereby further ensuring the uniformity of ozone distribution in the tank body 11.

[0044] like Figure 6 As shown, the driving mechanism 2 also includes a crankshaft 23 rotatably connected to the driving box 21, one end of the crankshaft 23 is connected to the driving motor 22, a connecting rod 24 is movably connected to the crankshaft 23, a guide rail 26 is fixedly connected to the upper part of the tank body 11, a rack 25 is slidably connected to the guide rail 26, one end of the rack 25 is pivotally connected to the end of the connecting rod 24, a gear 135 is fixedly connected to the upper end of the rotating shaft 134, and the gear 135 is meshed with the rack 25; when the driving motor 22 rotates, the crankshaft 23 and the connecting rod 24 are used to drive the rack 25 to make reciprocating linear motion on the guide rail 26, thereby driving the rotating shaft 134 to cycle forward and reverse, so that the air distribution disk 132 cycles forward and reverse, which not only enhances the air distribution effect of the air distribution disk 132, but also avoids the formation of vortex inside the tank body 11 due to the rotation of the air distribution disk 132.

[0045] like Figure 4 As shown, the air distribution plate 132 is provided with a plurality of blades 133, and the blades 133 stir the sewage and ozone, thereby further accelerating the efficiency of sewage oxidation treatment.

[0046] like Figure 3 As shown, a flow disturbance plate 111 is provided on the inner wall of the tank body 11, which further prevents the sewage from forming a vortex inside the tank body 11 when the air distribution plate 132 rotates.

[0047] like Figure 1 , Figure 3 As shown, a jacket 12 is provided outside the tank body 11, a heat exchange medium inlet 121 is provided at the upper portion of the jacket 12, and a heat exchange medium outlet 122 is provided at the lower portion of the jacket 12, so as to facilitate adjustment of the reaction temperature inside the oxidation tank 1 to improve the efficiency of sewage oxidation treatment.

[0048] like Figure 8 , Fig. 9 As shown, two groups of buffer tanks 4 are provided on one side of the oxidation tank 1, and a filter screen 43 is provided inside the buffer tank 4. A water inlet branch pipe 411 is provided at the lower part of the filter screen 43, and the two water inlet branch pipes 411 are connected through a water inlet main pipe 41. A water outlet branch pipe 412 is provided at the upper part of the filter screen 43, and the two water outlet branch pipes 412 are connected through a water outlet main pipe 45. Valves are provided on the water inlet branch pipe 411 and the water outlet branch pipe 412; a second sewage pipe 44 is provided at the lower part of the oxidation tank 1;

[0049] It also includes at least two pump groups 46, which are connected in series. The water outlet main pipe 45 of the buffer tank 4 is connected to the water inlet of the pump group 46, and the water outlet of the pump group 46 is connected to the water outlet pipe 47, which is connected to the water inlet pipe 15 of the tank body 11.

[0050] Before the sewage is oxidized, the buffer tank 4 is first used to filter out large particles of impurities to ensure the effect of the sewage oxidation treatment. The two buffer tanks 4 are connected in parallel, one for use and one for backup, which is convenient for cleaning the filter screen 43 without stopping the machine. The filtered sewage is pumped into the oxidation tank 1 by the pump group 46 for oxidation treatment. Multiple pump groups 46 are connected in series to enhance the head of the pump group 46, ensuring that the sewage is smoothly pumped into the oxidation tank 1 for oxidation treatment under the positive pressure of the tank body 11.

[0051] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A high-pressure catalytic oxidation reaction device, comprising an oxidation tank and an ozone generator, wherein the oxidation tank comprises a tank body, an air inlet pipe is arranged on one side of the lower part of the tank body, and a water inlet pipe is arranged on the other side of the tank body; a catalyst layer is arranged inside the tank body; a pressure gauge is arranged on the upper part of the tank body, characterized in that: A pressure maintaining structure is provided on one side of the pressure gauge, and the pressure maintaining structure includes a connecting pipe, one side of the connecting pipe is connected to an air outlet pipe, a top plug is slidably installed inside the connecting pipe, a spring is connected to the upper part of the top plug, an end plate is provided on the top of the connecting pipe, and one end of the spring is against the end plate; a drain pipe is provided on the upper part of the tank body, the drain pipe is located on the upper part of the catalyst layer, and a first sewage pipe is provided at the bottom of the tank body; an induced draft fan is provided on one side of the ozone generator, the induced draft fan's induced draft pipe is connected to the ozone generator, and the induced draft fan's outlet pipe is connected to the air inlet pipe; a one-way valve is provided on the outlet pipe.

2. A high pressure catalytic oxidation reaction device according to claim 1, characterized in that: The end plate is threadedly connected to the inner wall of the connecting pipe, and a safety valve is arranged on the upper part of the tank body.

3. A high pressure catalytic oxidation reaction device according to claim 1, characterized in that: A plurality of concentrically arranged coils are arranged on one side of the water inlet pipe, and adjacent coils are connected by a plurality of connecting pipes. A water leakage hole is arranged at the bottom of the coils.

4. A high pressure catalytic oxidation reaction device according to claim 1, characterized in that: One end of the air inlet pipe is connected to an air distribution plate, and the air distribution plate is provided with a plurality of evenly arranged air distribution holes.

5. A high pressure catalytic oxidation reaction device according to claim 4, characterized in that: A rotary joint is provided at one end of the air inlet pipe, the air distribution plate is rotatably connected to the rotary joint, and a rotating shaft is fixedly connected to the middle of the air distribution plate; a driving mechanism is provided on the upper part of the tank body, and the driving mechanism includes a driving box, a driving motor is installed on the upper part of the driving box, and the output shaft of the driving motor is connected to the rotating shaft.

6. A high pressure catalytic oxidation reaction device according to claim 5, characterized in that: The driving mechanism also includes a crankshaft rotatably connected to the driving box, one end of the crankshaft is connected to the driving motor, a connecting rod is movably connected to the crankshaft, a guide rail is fixedly connected to the upper part of the tank body, a rack is slidably connected to the guide rail, one end of the rack is pivotally connected to the end of the connecting rod, and a gear is fixedly connected to the upper end of the rotating shaft, and the gear is meshed with the rack.

7. A high pressure catalytic oxidation reaction device according to claim 6, characterized in that: The air distribution plate is provided with a plurality of blades.

8. A high pressure catalytic oxidation reaction device according to claim 7, characterized in that: The inner wall of the tank body is provided with a plurality of flow interference plates.

9. A high pressure catalytic oxidation reaction device according to claim 1, characterized in that: A jacket is arranged outside the tank body, a heat exchange medium inlet is arranged at the upper part of the jacket, and a heat exchange medium outlet is arranged at the lower part of the jacket.

10. A high pressure catalytic oxidation reaction device according to any one of claims 1 to 9, characterized in that: Two groups of buffer tanks are provided on one side of the oxidation tank, and a filter screen is provided inside the buffer tank. A water inlet branch pipe is provided at the lower part of the filter screen, and the two water inlet branches are connected by a water inlet main pipe. A water outlet branch pipe is provided at the upper part of the filter screen, and the two water outlet branches are connected by a water outlet main pipe. Valves are provided on the water inlet branch pipe and the water outlet branch pipe; a second sewage pipe is provided at the lower part of the oxidation tank; It also includes at least two pump groups, which are connected in series. The water outlet main pipe of the buffer tank is connected to the water inlet of the pump group. The water outlet of the pump group is connected to a water outlet pipe, and the water outlet pipe is connected to the water inlet pipe of the tank body.

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