Wastewater treatment device for triazinone production

Abstract

The utility model discloses a wastewater treatment device for triazinone production, which belongs to the technical field of triazinone production and comprises a premixing box, a ferrous sulfate inlet, a wastewater inlet and an acid inlet are arranged at the top of the premixing box, the premixing box is connected with a treatment box, a first spraying component is arranged on the upper portion of the inner wall of the treatment box, and two rotating rods are arranged in the treatment box side by side. A driving piece for driving the rotating rods to rotate is arranged on the two rotating rods, a plurality of conical rods are arranged on the rotating rods, and a liquid outlet is formed in the bottom end of the treatment box; the treatment box is connected with a gas treatment box through a gas outlet pipeline, a gas outlet is formed in the gas treatment box, a second spraying component is arranged at the top end of the inner wall of the gas treatment box, and a liquid outlet is formed in the bottom end of the gas treatment box. A small amount of bubbles generated in the treatment box are punctured through rotation of the conical rod, the bubbles are prevented from being gathered into foam to overflow and corrode the device, volatilized hydrogen chloride is guided into the gas treatment box to absorb hydrogen chloride gas, and environment pollution is avoided.

Description

Technical Field

[0001] This utility model relates to the field of triazine ketone production technology, specifically to a wastewater treatment device for triazine ketone production. Background Technology

[0002] Triazinone, also known as diethylhexylbutamidotriazinone, is mainly used as an intermediate in the manufacture of the insecticide methamidophos. During the production of triazinone, the wastewater contains a large amount of organic pollutants, and direct discharge would cause great pollution to the environment. Therefore, wastewater treatment equipment is often used to purify the wastewater.

[0003] The Fenton reaction, conducted under acidic conditions, involves the oxidation of organic compounds such as carboxylic acids, alcohols, and esters into inorganic forms using a mixed solution of hydrogen peroxide and ferrous sulfate. This reaction can effectively remove recalcitrant organic pollutants from triazine ketone wastewater. Currently, the Fenton reaction for triazine ketone wastewater is carried out in a tower reactor. During the reaction, a large amount of foam is generated inside the tower reactor, which overflows. Because the foam is acidic, it causes corrosion to the tower reactor itself and surrounding equipment.

[0004] The simultaneous addition of ferrous sulfate and hydrogen peroxide to the tower reactor causes hydrogen peroxide to react with ferrous iron. The heat generated during this reaction also decomposes the hydrogen peroxide, affecting the degradation rate of organic matter in the Fenton reaction and prolonging the reaction time.

[0005] In view of the problems existing in the prior art, this utility model combines years of design and use experience in related fields to design and manufacture a wastewater treatment device for triazine ketone production to overcome the above defects. Summary of the Invention

[0006] To address the problems existing in the prior art, this utility model provides a wastewater treatment device for triazine ketone production, which can reduce the decomposition of hydrogen peroxide and the side reaction with ferrous sulfate, puncture the foam to prevent foam from escaping and corroding the device, reduce the use of defoamers, and reduce the volatilization of acid.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A wastewater treatment device for triazine ketone production includes a premixing tank. The top of the premixing tank is provided with a ferrous sulfate inlet, a wastewater inlet, and an acid inlet. The bottom of the premixing tank is provided with a premixing outlet, which is connected to a treatment tank. The upper part of the inner wall of the treatment tank is provided with a first spraying component. Two rotating rods are arranged side by side inside the treatment tank. The two rotating rods are provided with driving components that drive them to rotate. Several conical rods are provided on the rotating rods. The bottom of the treatment tank is provided with a first liquid outlet.

[0008] The top of the treatment box is connected to a gas treatment box via an exhaust pipe. The gas treatment box has a gas outlet, a second spray component is provided at the top of the inner wall of the gas treatment box, and a second liquid outlet is provided at the bottom of the gas treatment box.

[0009] Preferably, the outer surface of the tapered rod is provided with a pointed protrusion.

[0010] Preferably, the tapered rods on the two rotating rods are staggered in the vertical direction.

[0011] Preferably, the driving component is located outside the processing box, and the driving component includes a meshing driving gear and a driven gear, which are respectively mounted on the two rotating rods, and the driving gear is connected to a first motor.

[0012] Preferably, the second spray component is connected to the lower part of the treatment box via a connecting pipe, and the connecting pipe is equipped with a water pump and a first valve;

[0013] The processing tank is equipped with a return port that matches the second liquid outlet.

[0014] Preferably, the processing tank is provided with a baffle plate, which is located directly below the return port and is horizontally arranged.

[0015] Preferably, the gas outlet is provided with a gas pipe, and the gas pipe is provided with a second valve;

[0016] The exhaust pipe is equipped with an air pump and a third valve.

[0017] Preferably, the first spray component includes an annular tube with a plurality of first nozzles evenly distributed circumferentially on the annular tube, and the annular tube is connected to a hydrogen peroxide tank through a first liquid inlet pipe.

[0018] Preferably, the second spraying component includes a plurality of spray pipes arranged side by side, and the spray pipes are provided with a plurality of second nozzles;

[0019] Several of the spray pipes are connected to the connecting pipe.

[0020] Preferably, a rotating shaft is vertically arranged inside the premixing box, and a plurality of premixing rods are arranged on the rotating shaft. The top end of the rotating shaft extends upward out of the top of the premixing box and is connected to a second motor.

[0021] The advantages of this utility model are:

[0022] 1. In this invention, ferrous sulfate is first mixed evenly with wastewater, and then hydrogen peroxide solution is continuously added to the wastewater in small amounts through the first spraying component to reduce the occurrence of side reactions and reduce the generation of bubbles; the small number of bubbles generated in the treatment tank are punctured by the rotation of the conical rod to prevent the bubbles from accumulating into foam and overflowing to corrode the device.

[0023] 2. This utility model utilizes an outlet pipe to introduce the oxygen and volatile hydrogen chloride gas generated in the treatment chamber into the gas treatment chamber. Combined with the second spray component, the solution is sprayed out to absorb the hydrogen chloride gas and flows back into the treatment chamber, ensuring the acidic environment of the Fenton reaction and promoting the uniform mixing of hydrogen peroxide solution and wastewater.

[0024] 3. This utility model is equipped with a baffle plate to reduce the potential energy of the solution flowing from the gas treatment box back to the treatment box, thereby reducing the generation of bubbles during solution mixing. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a wastewater treatment device for triazine ketone production.

[0026] In the diagram: 1-Premixing tank, 2-Ferrous sulfate inlet, 3-Wastewater inlet, 4-Acid inlet, 5-Rotating shaft, 6-Premixing rod, 7-Premixing outlet, 8-Treatment tank, 9-Annular pipe, 10-Vertical rod, 11-First nozzle, 12-First liquid inlet pipe, 13-Rotating rod, 14-Conical rod, 15-Driving gear, 16-Driven gear, 17-First motor, 18-First liquid outlet, 19-Second motor, 20-Pointed protrusion, 21-Baffle plate, 22-Gas outlet, 23-Gas outlet pipe, 24-Air pump, 25-Gas treatment tank, 26-Gas outlet, 27-Gas pipe, 28-Spray pipe, 29-Second nozzle, 30-Second liquid inlet pipe, 31-Connecting pipe, 32-Water pump, 33-Second liquid outlet, 34-Return port, 35-Second valve, 36-First valve, 37-Third valve. Detailed Implementation

[0027] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0028] like Figure 1As shown, a wastewater treatment device for triazine ketone production includes a premixing tank 1. The top of the premixing tank 1 is equipped with a ferrous sulfate inlet 2, a wastewater inlet 3, and an acid inlet 4. A vertically mounted rotating shaft 5 is installed inside the premixing tank 1, with its top extending upwards from the top of the premixing tank 1 and connected to a second motor 19. The rotating shaft 5 is rotatably connected to the premixing tank 1 and has several premixing rods 6 mounted on it. A pH meter (not shown in the figure) is installed on the premixing tank 1 to detect the pH within the tank. The Fenton reaction is carried out at pH 2-4. The wastewater is premixed in the premixing tank 1 to adjust its pH before being premixed with the ferrous sulfate solution to avoid increased side reactions caused by the simultaneous addition of ferrous sulfate and hydrogen peroxide, and to reduce bubble formation.

[0029] The premixing tank 1 has a premixing outlet 7 at its bottom, which is connected to a processing tank 8. A first spraying component is located on the upper part of the inner wall of the processing tank 8. The first spraying component includes an annular pipe 9, with two vertical rods 10 connected between the upper end of the annular pipe 9 and the processing tank 8. Several first nozzles 11 are evenly distributed circumferentially on the annular pipe 9, which is connected to a hydrogen peroxide tank (not shown in the figure) via a first inlet pipe 12.

[0030] By uniformly adding a small amount of hydrogen peroxide solution to the premixed liquid through the first spray component, the Fenton reaction can be carried out in a controllable manner, reducing the side reactions of hydrogen peroxide and ferrous sulfate, as well as the self-decomposition reaction of hydrogen peroxide, reducing unnecessary consumption of hydrogen peroxide, and reducing the generation of bubbles.

[0031] Two rotating rods 13 are arranged side by side inside the treatment tank 8. Each rotating rod 13 has a driving component that drives its rotation, and the driving component is located outside the treatment tank 8. The driving component includes a meshing drive gear 15 and a driven gear 16, which are respectively mounted on the two rotating rods 13. The drive gear 15 is connected to a first motor 17. Several conical rods 14 are provided on the rotating rods 13, and a first liquid outlet 18 is provided at the bottom of the treatment tank 8. A transparent window is provided on the treatment tank 8, allowing observation of the reaction inside. Pre-mixing the wastewater with the ferrous sulfate solution can reduce bubble formation. When a small number of bubbles are generated inside the treatment tank 8, the rotation of the conical rods 14 in this invention can puncture the bubbles, preventing them from accumulating into foam and overflowing from the treatment tank 8, causing corrosion. Specifically, the outer surface of the conical rods 14 has pointed protrusions 20, and the conical rods 14 on the two rotating rods 13 are staggered in the vertical direction to improve the effect of puncturing bubbles.

[0032] The upper part of the treatment tank 8 is provided with an outlet 22, and an outlet pipe 23 is provided on the outlet 22. The end of the outlet pipe 23 away from the outlet 22 is connected to a gas treatment tank 25. The gas treatment tank 25 is provided with a gas outlet 26, which is preferably located on the side of the gas treatment tank 25 away from the outlet pipe 23 to improve the absorption effect of hydrogen chloride. A vacuum pump 24 and a third valve 37 are provided on the outlet pipe 23. A gas pipe 27 is provided on the gas outlet 26, and a second valve 35 is provided on the gas pipe 27. A second spray component is provided at the top of the inner wall of the gas treatment tank 25, and a second liquid outlet 33 is provided at the bottom of the gas treatment tank 25. Since the wastewater contains sodium chloride, hydrogen chloride will be generated in the acidic environment inside the treatment tank 8, and hydrogen chloride is easily volatilized into gas. In this invention, a small amount of oxygen and hydrogen chloride gas generated by the decomposition of hydrogen peroxide enter the gas treatment tank 25 through the outlet pipe 23, and the second spray component sprays out an aqueous solution to absorb the hydrogen chloride, avoiding environmental pollution.

[0033] The second spray component is connected to the lower part of the treatment tank 8 via a connecting pipe 31. A water pump 32 and a first valve 36 are mounted on the connecting pipe 31. Specifically, the second spray component includes several spray pipes 28 arranged side-by-side, each with several second nozzles 29. A second inlet pipe 30 is connected to each spray pipe 28, with the end of the second inlet pipe 30 away from the spray pipes 28 connected to the connecting pipe 31. The treatment tank 8 has a return port 34 matching the second liquid outlet 33. The second spray component can spray the solution from the treatment tank 8, absorb hydrogen chloride, and return it to the treatment tank 8, reducing acid waste and maintaining reaction conditions. Simultaneously, it promotes the mixing of the liquid and the hydrogen peroxide solution, and the oxygen after spraying is directly released into the air without causing pollution.

[0034] A baffle plate 21 is installed on the treatment tank 8, located directly below the return liquid port 34 and horizontally positioned. The baffle plate 21 reduces the potential energy of the solution flowing back from the gas treatment tank 25 into the treatment tank 8, causing the returning solution to mix with the liquid in the treatment tank 8 at a low flow rate, thereby reducing bubble generation. The wastewater after the Fenton reaction treatment is discharged into the activated carbon adsorption process.

[0035] Detailed operation process

[0036] Wastewater is introduced into premixing tank 1, and the second motor 19 is started. The second motor 19 drives the rotating shaft 5 to rotate, and the rotating shaft 5 drives the premixing rod 6 to rotate, which stirs the liquid. Hydrochloric acid is added into premixing tank 1 through acid inlet 4 to adjust the pH to 2-4, and then ferrous sulfate solution is added. After the solution is mixed evenly, it is introduced into treatment tank 8.

[0037] The first motor 17 is started, which drives the connected rotating rod 13 to rotate. The rotating rod 13 drives the driving gear 15 to rotate, which in turn drives the meshing driven gear 16 to rotate. The driven gear 16 drives the connected rotating rod 13 to rotate, and the two rotating rods 13 drive the conical rod 14 to rotate, stirring the liquid. Hydrogen peroxide solution is introduced into the annular tube 9 through the first inlet pipe 12. The hydrogen peroxide solution is sprayed out from the first nozzle 11 and mixes with the solution in the treatment tank 8. The conical rod 14 punctures the small number of bubbles generated.

[0038] The vacuum pump 24 and the third valve 37 are activated. The vacuum pump 24 draws oxygen and hydrogen chloride gas from the treatment tank 8 into the gas treatment tank 25. The water pump 32 and the first valve 36 are activated. The water pump 32 draws the solution from the treatment tank 8 into the connecting pipe 31, which then enters the spray pipe 28 and is sprayed out from the second nozzle 29. The sprayed solution absorbs the hydrogen chloride and falls to the bottom of the gas treatment tank 25, flowing back into the treatment tank 8 from the second liquid outlet 33. After passing through the baffle 21, it mixes with the solution in the treatment tank 8 at a low flow rate. The second valve 35 on the gas pipe 27 is opened, and the oxygen in the gas treatment tank 25 is discharged from the gas pipe 27. After the reaction is complete, the liquid is discharged from the first liquid outlet 18 of the treatment tank 8.

[0039] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A wastewater treatment device for triazinone production, characterized by comprising: The utility model provides a waste water treatment device, including premixing box (1), the top of premixing box (1) is equipped with ferrous sulfate inlet (2), waste water inlet (3) and acid inlet (4), the bottom of premixing box (1) is equipped with premixing outlet (7), premixing outlet (7) is connected with processing box (8), the upper portion of inside wall of processing box (8) is equipped with first spraying part, processing box (8) is equipped with two rotating rods (13) side by side in, and the rotating rod (13) is equipped with the drive piece of driving its rotation, and the rotating rod (13) is equipped with a plurality of conical rods (14), and the bottom of processing box (8) is equipped with first liquid outlet (18). The top of processing box (8) is connected with gas processing box (25) through gas outlet pipeline (23), and the gas processing box (25) is equipped with gas outlet (26), and the top of the inner wall of gas processing box (25) is equipped with second spraying part, and the bottom of gas processing box (25) is equipped with second liquid outlet (33).

2. The apparatus for treating wastewater from triazine ketone production according to claim 1, characterized by The outer surface of the conical rod (14) is provided with a pointed protrusion (20).

3. The triazone production wastewater treatment apparatus according to claim 1, characterized by The conical rods (14) on the two rotating rods (13) are staggered in the vertical direction.

4. The apparatus for treating wastewater from triazine ketone production according to claim 1, characterized by The drive member is located outside the processing box (8), and the drive member includes a driving gear (15) and a driven gear (16) engaged with each other, the driving gear (15) and the driven gear (16) are arranged on the two rotating rods (13) respectively, and the driving gear (15) is connected with a first motor (17).

5. The triazone production wastewater treatment apparatus according to claim 1, characterized by The second spraying part is communicated with the lower part of the processing box (8) through a connecting pipe (31), and the connecting pipe (31) is provided with a water pump (32) and a first valve (36); the processing box (8) is provided with a liquid return port (34) matched with the second liquid outlet (33).

6. The apparatus for treating wastewater from triazine ketone production according to claim 5, characterized by The processing box (8) is provided with a flow baffle (21), which is located directly below the liquid return port (34) and is horizontally arranged.

7. The apparatus for treating wastewater from triazine ketone production according to claim 1, characterized by The gas outlet (26) is provided with a gas pipeline (27), and the gas pipeline (27) is provided with a second valve (35); The gas outlet pipeline (23) is provided with an air pump (24) and a third valve (37).

8. The apparatus for treating wastewater from triazine ketone production according to claim 1, characterized by The first spraying part includes an annular pipe (9), and a plurality of first nozzles (11) are uniformly distributed circumferentially on the annular pipe (9); the annular pipe (9) is connected with a hydrogen peroxide tank through a first liquid inlet pipe (12).

9. The apparatus for treating wastewater from triazine ketone production according to claim 5, characterized by The second spraying part includes a plurality of spray pipes (28) arranged side by side, and a plurality of second nozzles (29) are arranged on the spray pipes (28); A plurality of spray pipes (28) are connected with the connecting pipe (31).

10. The apparatus for treating wastewater from triazine ketone production according to claim 1, characterized by A rotating shaft (5) is vertically arranged in the premixing box (1), a plurality of premixing rods (6) are arranged on the rotating shaft (5), and the top end of the rotating shaft (5) protrudes out of the top of the premixing box (1) and is connected with a second motor (19).

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