Process for treating hypophosphite by using potassium permanganate method

Abstract

The invention discloses a process for treating hypophosphite by using a potassium permanganate method, and relates to the technical field of hypophosphite. The sewage treatment device comprises a supporting structure, a fixed bottom plate stirring structure is installed on the inner side of the top of the supporting structure through bolts, and a material distributing structure is installed on the top of the supporting structure through bolts. The supporting structure comprises a fixed bottom plate, when a potassium permanganate method is used for treatment, materials are distributed into an inner cavity of a measuring tube through a material storage barrel, the using amount of the materials is measured through the measuring tube, and therefore the using amount detected by an infrared detector is measured, a control panel controls a timing discharging groove, and the time of discharging is controlled. And the discharged materials are monitored, so that the use amount of manually prepared materials is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of hypophosphite, and in particular to a process for treating hypophosphite by using a potassium permanganate method. Background Art

[0002] In the current prior art, the research progress on the application of phosphite as a fungicide in agriculture generally shows that phosphite products have certain effects on Oomycete diseases of different crops, so there are various methods for applying phosphite. However, when extracting phosphite, it is obtained by treating wastewater materials, and the potassium permanganate method is one of the methods for extracting phosphite, which requires cumbersome steps to obtain phosphite.

[0003] However, the existing technology still has shortcomings, such as the following aspects: When using potassium permanganate method to treat hypophosphite, each time materials need to be added for mixing, they need to be stirred. In order to ensure the amount of materials added each time, materials need to be manually prepared and then added. This leads to many operating steps and troublesome manual operation when using potassium permanganate method to treat hypophosphite. Summary of the invention

[0004] The present invention provides a process for treating hypophosphite by potassium permanganate method to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A process for treating hypophosphite by potassium permanganate method comprises the following steps: Step 1: pretreatment, adding the waste liquid into the inner side of the stirring barrel, then adding ferrous sulfate into the waste liquid and starting the driving motor to drive the stirring blades of the stirring rod inside the stirring barrel to fully stir and dissolve the ferrous sulfate, providing ferrous ions as a catalyst; Step 2, oxidation reaction, adding 30% hydrogen peroxide to the waste liquid for reaction, during which the pH value of the solution is maintained between 1 and 5, the total amount of hydrogen peroxide added is 4 to 8 times the total amount of hypophosphorous acid, adding a certain amount of 30% hydrogen peroxide every 5 to 20 minutes within 1 to 3 hours for reaction, and after adding the hydrogen peroxide, continue to start the driving motor to stir the inside of the stirring barrel for more than 10 minutes to allow the reaction to proceed fully; Step 3: pH adjustment: using NaOH to maintain the pH value of the solution, or adjusting the pH value of the filtrate by lime water or calcium hydroxide; Step 4: Separate by precipitation, filter and obtain phosphoferric salt, adjust the pH of the filtrate to > 8, and filter the precipitate to obtain a clear colorless filtrate; Step 5: Add oxidant. When KMnO4 is 1.2 times of the theoretical value, all hypophosphite and phosphite can be oxidized into orthophosphate, reducing solubility, precipitating and separating, and thus removing phosphorus. Step 6: flocculation and precipitation, adding calcium salt (such as calcium chloride) as a precipitating agent to react with orthophosphate to form a granular, insoluble substance, namely calcium phosphate precipitate, thereby achieving phosphorus removal; Step seven: solid-liquid separation: solid-liquid separation is performed by flocculation and sedimentation to further remove phosphorus.

[0006] Preferably, it comprises a support structure, the inner side bolts at the top of the support structure are installed with a fixed bottom plate stirring structure, the top bolts of the support structure are installed with a material distribution structure, the support structure comprises a fixed bottom plate, the top bolts of the fixed bottom plate are installed with a support column, and the top bolts of the support column are installed with a fixed platform; The fixed bottom plate stirring structure comprises a driving motor which is bolted to the top of the fixed bottom plate, and one end of the top of the driving motor is connected to a driving rod.

[0007] Preferably, the material distribution structure includes a material storage barrel installed on the top of the fixed platform by bolts, and a timing discharge groove is installed on the bottom bolts of the outer wall of the material storage barrel.

[0008] Preferably, a transmission pipe is installed on the outer wall of one side of the timing discharge groove, and a mounting cover is installed at one end of the transmission pipe.

[0009] Preferably, a control panel is installed on one side of the outer wall of the installation cover, and an infrared detector is installed on the inner side of the outer wall of the installation cover.

[0010] Preferably, a measuring tube is installed on the inner side of the bottom of the mounting cover, and a discharge valve is installed at one end of the bottom of the measuring tube.

[0011] Preferably, the bottoms of both sides of the discharge valve are bolted to the outer wall of the fixing platform, and a floating plate is placed in the inner cavity of the measuring tube.

[0012] Preferably, the outer wall bolts of the support column are mounted with a fixing frame, and the outer wall bolts on the top of the fixing frame are mounted with a mixing barrel.

[0013] Preferably, a stirring rod is bolted to one end of the top of the transmission rod, a stirring blade is installed on the outer wall of the stirring rod and located on the inner side of the stirring barrel, and the outer wall of the bottom of the stirring rod is rotatably connected to the bottom of the inner side of the stirring barrel.

[0014] Preferably, a scraper is installed at the bottom of the outer wall of the stirring rod and at the bottom inside the stirring barrel, and a discharge valve is installed on the outer wall bolts on one side of the bottom of the stirring barrel.

[0015] In summary, this technical solution mainly has the following beneficial effects: When using the potassium permanganate method for treatment, the material is distributed to the inner cavity of the measuring tube using a storage barrel, and the material usage is measured using the measuring tube. The usage is measured by the infrared detector, and the control panel controls the timed discharge chute to monitor the discharged material and reduce the amount of manual material preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a process flow chart of the present invention; Figure 2 It is a schematic diagram of the main structure of the present invention; Figure 3 It is a schematic diagram of the measuring tube structure of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the mixing barrel of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the measuring tube of the present invention.

[0017] In the figure: 1. Support structure; 11. Fixed bottom plate; 12. Support column; 13. Fixed platform; 14. Fixed frame; 2. Stirring structure; 21. Drive motor; 211. Transmission rod; 22. Stirring barrel; 221. Stirring blade; 222. Scraper; 223. Discharge valve; 224. Stirring rod; 3. Material distribution structure; 31. Material storage barrel; 32. Timed discharge trough; 33. Transmission pipeline; 34. Installation cover; 341. Control panel; 342. Infrared detector; 343. Measuring tube; 344. Discharge valve; 345. Floating plate. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] like Figure 1 - Figure 5 As shown, a process for treating hypophosphite by potassium permanganate method comprises the following steps: Step 1: pretreatment, adding the waste liquid into the inner side of the stirring barrel 22, then adding ferrous sulfate into the waste liquid and starting the driving motor 21 to allow the stirring rod 224 inside the stirring barrel 22 to drive the stirring blade 221 to fully stir and dissolve the ferrous sulfate, providing ferrous ions as a catalyst; Step 2, oxidation reaction, adding 30% hydrogen peroxide to the waste liquid for reaction, during which the pH value of the solution is maintained between 1 and 5, the total amount of hydrogen peroxide added is 4 to 8 times the total amount of hypophosphorous acid, adding a certain amount of 30% hydrogen peroxide every 5 to 20 minutes within 1 to 3 hours for reaction, and after adding the hydrogen peroxide, continue to start the drive motor 21 to stir the inside of the stirring barrel 22 for more than 10 minutes to allow the reaction to proceed fully; Step 3: pH adjustment: using NaOH to maintain the pH value of the solution, or adjusting the pH value of the filtrate by lime water or calcium hydroxide; Step 4: Separate by precipitation, filter and obtain phosphoferric salt, adjust the pH of the filtrate to > 8, and filter the precipitate to obtain a clear colorless filtrate; Step 5: Add oxidant. When KMnO4 is 1.2 times of the theoretical value, all hypophosphite and phosphite can be oxidized into orthophosphate, reducing solubility, precipitating and separating, and thus removing phosphorus. Step 6: flocculation and precipitation, adding calcium salt such as calcium chloride as a precipitating agent to react with orthophosphate to form a granular, insoluble substance, namely calcium phosphate precipitate, thereby achieving phosphorus removal; Step seven: solid-liquid separation: solid-liquid separation is performed by flocculation and sedimentation to further remove phosphorus.

[0020] The supporting structure 1 comprises a fixing bottom plate stirring structure 2 installed on the inner side of the top of the supporting structure 1, a material distribution structure 3 installed on the top of the supporting structure 1, and the supporting structure 1 comprises a fixing bottom plate 11, a supporting column 12 installed on the top of the fixing bottom plate 11, and a fixing platform 13 installed on the top of the supporting column 12; The fixed bottom plate stirring structure 2 includes a driving motor 21 bolted to the top of the fixed bottom plate 11 , and one end of the top of the driving motor 21 is connected to a driving rod 211 .

[0021] It should be noted that, in this embodiment, the fixed bottom plate stirring structure 2 and the material dividing structure 3 are supported and fixed by the supporting structure 1, and then the hydrogen peroxide and other materials are quantitatively transferred to the inside of the stirring barrel 22 through the material dividing structure 3, so that the waste liquid and the hydrogen peroxide and other materials are mixed and stirred through the fixed bottom plate stirring structure 2.

[0022] The material distribution structure 3 includes a material storage barrel 31 bolted to the top of the fixed platform 13, a timing discharge groove 32 is bolted to the bottom of the outer wall of the material storage barrel 31, a transmission pipe 33 is installed on the outer wall of one side of the timing discharge groove 32, a mounting cover 34 is installed at one end of the transmission pipe 33, a control panel 341 is installed on one side of the outer wall of the mounting cover 34, an infrared detector 342 is installed on the inner side of the outer wall of the mounting cover 34, a measuring tube 343 is installed on the inner side of the bottom of the mounting cover 34, a discharge valve 344 is installed at one end of the bottom of the measuring tube 343, the bottoms of both sides of the discharge valve 344 are bolted to the outer wall of the fixed platform 13, and a floating plate 345 is placed in the inner cavity of the measuring tube 343.

[0023] It should be noted that, in this embodiment, by opening the timed discharge slot 32, the material inside the storage barrel 31 is guided into the transmission pipe 33, and then the material is guided into the inner cavity of other measuring tubes 343 through the transmission pipe 33. When the material enters the inner cavity of the measuring tube 343, the floating plate 345 will float up in the inner cavity of the measuring tube 343. When the floating plate 345 floats up to the same height as the infrared detector 342, the timed discharge slot 32 controlled by the control panel 341 is closed, and the discharge valve 344 is opened at the same time, so that the discharge valve 344 can discharge the material quantitatively into the inner side of the mixing barrel 22.

[0024] The outer wall bolts of the support column 12 are installed with a fixing frame 14, the outer wall bolts at the top of the fixing frame 14 are installed with a mixing barrel 22, one end of the top of the transmission rod 211 is bolted with a stirring rod 224, the outer wall of the stirring rod 224 and the inner side of the stirring barrel 22 are installed with a stirring blade 221, the outer wall of the bottom of the stirring rod 224 is rotatably connected to the bottom of the inner side of the stirring barrel 22, the bottom of the outer wall of the stirring rod 224 and the bottom of the inner side of the stirring barrel 22 are installed with a scraper 222, and the outer wall bolts on one side of the bottom of the stirring barrel 22 are installed with a discharge valve 223.

[0025] It should be noted that, in the present embodiment, when other materials enter the mixing barrel 22, the driving motor 21 is started, and the transmission rod 211 connected to the driving motor 21 is driven, so that the transmission connection at one end of the top of the transmission rod 211 drives the stirring rod 224 inside the mixing barrel 22 to rotate, and when the stirring rod 224 rotates, it drives the stirring blade 221 to stir the inside of the mixing barrel 22 at a regular time, and after the materials are added for treatment through the potassium permanganate method step, the scraper 222 is driven by the stirring rod 224 to rotate at the bottom of the mixing barrel 22, and the sediment is blocked to the discharge valve 223, and the sediment inside the mixing barrel 22 is pushed to the discharge valve 223 for discharge by opening the discharge valve 223.

[0026] The working principle of the present invention is as follows: the support structure 1 supports and fixes the fixed bottom plate stirring structure 2 and the material distribution structure 3, and then the hydrogen peroxide and other materials are quantitatively transferred to the inside of the stirring barrel 22 through the material distribution structure 3, so that the waste liquid and the hydrogen peroxide and other materials are mixed and stirred through the fixed bottom plate stirring structure 2. By opening the timing discharge slot 32, the material inside the storage barrel 31 is guided into the transmission pipe 33, and then the material is guided into the inner cavity of the other measuring tube 343 through the transmission pipe 33. When the material enters the inner cavity of the measuring tube 343, the floating plate 345 will float up in the inner cavity of the measuring tube 343. When the floating plate 345 floats up to the same height as the infrared detector 342, the timing discharge slot 32 controlled by the control panel 341 is closed, and the discharge valve 344 is opened at the same time, so that the discharge valve 344 discharges the material quantitatively into the inner side of the mixing barrel 22. When other materials enter the mixing barrel 22, the driving motor 21 is started, and the driving motor 21 drives the transmission rod 211, so that the transmission connection at one end of the top of the transmission rod 211 drives the stirring rod 224 inside the mixing barrel 22 to rotate. When the stirring rod 224 rotates, it drives the stirring blade 221 to stir the inside of the mixing barrel 22 regularly. After the materials are added through the potassium permanganate method step for processing, the scraper 222 is driven by the stirring rod 224 to rotate at the bottom of the mixing barrel 22, and the sediment is blocked to the discharge valve 223. By opening the discharge valve 223, the sediment inside the mixing barrel 22 is pushed to the discharge valve 223 for discharge.

[0027] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A process for treating hypophosphite by potassium permanganate method, characterized in that: The following steps are involved: Step 1, pretreatment, adding the waste liquid to the inner side of the stirring barrel (22), then adding ferrous sulfate to the waste liquid and starting the driving motor (21) to allow the stirring rod (224) inside the stirring barrel (22) to drive the stirring blade (221) to fully stir and dissolve the ferrous sulfate, thereby providing ferrous ions as a catalyst; Step 2, oxidation reaction, adding 30% hydrogen peroxide to the waste liquid for reaction, during which the pH value of the solution is maintained between 1 and 5, the total amount of hydrogen peroxide added is 4 to 8 times the total amount of hypophosphorous acid, adding a certain amount of 30% hydrogen peroxide every 5 to 20 minutes for 1 to 3 hours for reaction, and after adding the hydrogen peroxide, continuing to start the drive motor (21) to stir the inside of the stirring barrel (22) for more than 10 minutes to allow the reaction to proceed fully; Step 3: pH adjustment: using NaOH to maintain the pH value of the solution, or adjusting the pH value of the filtrate by lime water or calcium hydroxide; Step 4: Separate by precipitation, filter and obtain phosphoferric salt, adjust the pH of the filtrate to > 8, and filter the precipitate to obtain a clear colorless filtrate; Step 5: Add oxidant. When KMnO4 is 1.2 times of the theoretical value, all hypophosphite and phosphite can be oxidized into orthophosphate, reducing solubility, precipitating and separating, and thus removing phosphorus. Step 6: flocculation and precipitation, adding calcium salt (such as calcium chloride) as a precipitating agent to react with orthophosphate to form a granular, insoluble substance, namely calcium phosphate precipitate, thereby achieving phosphorus removal; Step seven: solid-liquid separation: solid-liquid separation is performed by flocculation and sedimentation to further remove phosphorus.

2. The process for treating hypophosphite by potassium permanganate method according to claim 1, characterized in that: The invention comprises a support structure (1), wherein a fixed bottom plate stirring structure (2) is installed on the inner side of the top of the support structure (1), and a material distribution structure (3) is installed on the top of the support structure (1), and is characterized in that: the support structure (1) comprises a fixed bottom plate (11), a support column (12) is installed on the top of the fixed bottom plate (11), and a fixed platform (13) is installed on the top of the support column (12); The stirring structure (2) comprises a driving motor (21) bolted to the top of the fixed bottom plate (11), and one end of the top of the driving motor (21) is drivingly connected to a driving rod (211).

3. A process for treating hypophosphite by potassium permanganate method according to claim 2, characterized in that: The material distribution structure (3) comprises a material storage barrel (31) bolted to the top of the fixed platform (13), and a timing discharge groove (32) is bolted to the bottom of the outer wall of the material storage barrel (31).

4. A process for treating hypophosphite by potassium permanganate method according to claim 3, characterized in that: A transmission pipe (33) is installed on the outer wall of one side of the timing discharge groove (32), and a mounting cover (34) is installed at one end of the transmission pipe (33).

5. A process for treating hypophosphite by potassium permanganate method according to claim 4, characterized in that: A control panel (341) is installed on one side of the outer wall of the installation cover (34), and an infrared detector (342) is installed on the inner side of the outer wall of the installation cover (34).

6. The process for treating hypophosphite by potassium permanganate method according to claim 4, characterized in that: A measuring tube (343) is installed on the inner side of the bottom of the installation cover (34), and a discharge valve (344) is installed at one end of the bottom of the measuring tube (343).

7. A process for treating hypophosphite by potassium permanganate method according to claim 6, characterized in that: The bottoms of both sides of the discharge valve (344) are bolted to the outer wall of the fixing platform (13), and a floating plate (345) is placed in the inner cavity of the measuring tube (343).

8. The process for treating hypophosphite by potassium permanganate method according to claim 2, characterized in that: The outer wall bolts of the support column (12) are mounted with a fixing frame (14), and the outer wall bolts at the top of the fixing frame (14) are mounted with a mixing barrel (22).

9. The process for treating hypophosphite by potassium permanganate method according to claim 2, characterized in that: A stirring rod (224) is bolted to one end of the top of the transmission rod (211); a stirring blade (221) is installed on the outer wall of the stirring rod (224) and located inside the stirring barrel (22); and the outer wall of the bottom of the stirring rod (224) is rotatably connected to the bottom of the inner side of the stirring barrel (22).

10. The process for treating hypophosphite by potassium permanganate method according to claim 9, characterized in that: A scraper (222) is installed at the bottom of the outer wall of the stirring rod (224) and located at the bottom inside the stirring barrel (22), and a discharge valve (223) is installed on the outer wall bolts on one side of the bottom of the stirring barrel (22).

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