Adding device for emergency treatment of refractory COD (Chemical Oxygen Demand) and control method

Abstract

The invention discloses a refractory COD emergency treatment adding device and a control method, and relates to the technical field of wastewater treatment in environmental protection engineering, the refractory COD emergency treatment adding device comprises a stock bin used for storing activated carbon, the stock bin is provided with a feeding pipeline used for conveying the activated carbon to the stock bin, and a feeding electric valve is arranged at the bottom of the stock bin; the weighing mechanism is used for weighing the activated carbon and comprises a hopper and a weighing sensor, the hopper is supported on the weighing sensor and located at the bottom of the stock bin, the hopper is connected with a feeding electric valve of the stock bin, the stirring device is connected with the hopper, and the stirring device is used for receiving the weighed activated carbon and quantitatively adding water for stirring; the conveying device is connected with the stirring device and used for conveying the stirred activated carbon aqueous solution into the COD treatment system, the adding amount of the activated carbon is accurate, the activated carbon is uniformly dispersed after being stirred, and the wastewater treatment effect of the COD treatment system can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of wastewater treatment in environmental protection projects, and in particular to an emergency treatment dosing device for difficult-to-degrade COD and a control method thereof. Background Art

[0002] In environmental protection projects, chemical oxygen demand (COD) is an important indicator to measure the degree of organic pollution in water. In order to reduce the COD content in water, activated carbon adsorption is often used for treatment. However, activated carbon is not easily soluble in water, and direct addition has poor effect.

[0003] At present, the common treatment method is to use a circulating pump to drive the water in the preparation tank to flow through the Venturi tube at a high speed, generate negative pressure at the side inlet of the Venturi tube, and suck the powdered activated carbon in the activated carbon material trough into the preparation tank to achieve the mixing of powdered activated carbon and water. Although this method does not require manual feeding and has low labor intensity for workers, it is impossible to accurately control the amount of activated carbon added, resulting in unstable treatment effect. At the same time, the dispersion of activated carbon in water is limited, which further affects the treatment effect.

[0004] In view of the above problems, it is urgent to develop a device that can automatically and accurately add activated carbon. Summary of the invention

[0005] In order to help improve the problem of accurate addition of activated carbon, the present application provides an emergency treatment dosing device and a control method for difficult-to-degrade COD.

[0006] In the first aspect, the present application provides a device for emergency treatment of refractory COD, which adopts the following technical solution: A dosing device for emergency treatment of difficult-to-degrade COD, comprising a silo for storing activated carbon, the silo being provided with a feeding pipe for conveying the activated carbon to the silo, a feeding electric valve being provided at the bottom of the silo, and a weighing mechanism for weighing the activated carbon, the weighing mechanism comprising a hopper and a weighing sensor, the hopper being located at the bottom of the silo and supported on the weighing sensor, the hopper being connected to the feeding electric valve of the silo, and a stirring device connected to the hopper, the stirring device being used to receive the weighed activated carbon and adding water in a quantitative manner for stirring; and a conveying device, connected to the stirring device, for conveying the stirred activated carbon aqueous solution to a COD treatment system.

[0007] By adopting the above technical scheme, the activated carbon raw material is stored in the silo. When batching is required, the feeding electric valve at the bottom of the silo feeds the material to the hopper of the weighing mechanism. The weighed activated carbon is transported to the stirring device through the feeding electric valve. The stirring device adds water to the weighed activated carbon raw material in a quantitative manner and stirs it. The stirred activated carbon solution is transported to the COD treatment system through the conveying device. The amount of activated carbon added in the stirring device is accurate. After stirring, the activated carbon is evenly dispersed, which helps to improve the effect of the COD treatment system on wastewater treatment.

[0008] Optionally, the weighing mechanism also includes a discharge vibrator and a discharge electric valve, the discharge vibrator is fixed on the side wall of the hopper, the discharge electric valve is installed at the discharge port of the hopper, and the end of the discharge electric valve away from the hopper is connected to the stirring device through a discharge pipe, and the discharge pipe is movably connected to the stirring device.

[0009] By adopting the above technical scheme, the discharge vibrator and the discharge electric valve are used in combination, so that all the activated carbon raw materials weighed in the hopper can be transported to the stirring device. At the same time, the discharge pipe is movably connected with the stirring device. When the activated carbon raw materials in the hopper are weighed, it helps to reduce the influence of the connection between the discharge pipe and the stirring device on the weighing result of the activated carbon raw materials, which helps to accurately control the amount of activated carbon added.

[0010] Optionally, the stirring device includes a stirring tank, an agitator, a stirring motor, a water inlet pipe connected to the stirring tank, and a water inlet flow valve installed on the water inlet pipe, the agitator is placed in the stirring tank, the stirring motor is fixed on the upper cover of the stirring tank, the stirring motor is transmission-connected to the agitator, the upper cover of the stirring tank is provided with a feeding port, the feeding pipe is connected to the feeding port, a discharge valve is provided at the bottom of the stirring tank, and the discharge valve is connected to the conveying device.

[0011] By adopting the above technical solution, the water inlet pipe is connected to the stirring tank, and a water inlet flow valve is installed on the water inlet pipe to control the total amount of water entering the stirring tank each time the activated carbon ingredient is added, thereby controlling the concentration of the activated carbon solution, which helps to accurately control the concentration of the activated carbon solution.

[0012] Optionally, the feed inlet is provided at one end of the feed discharge pipe away from the mixing tank, and the outer wall of the feed discharge pipe is gap-matched with the feed inlet.

[0013] By adopting the above technical solution, the feed pipe is passed through the feed inlet, which helps to prevent the activated carbon entering the mixing tank from generating dust. The outer wall of the feed pipe and the gap between the feed inlet are matched, which helps to prevent the feed pipe from affecting the weighing result when the activated carbon in the hopper is weighed.

[0014] Optionally, the conveying device includes a temporary storage box, a discharge pipe connected to the bottom of the temporary storage box, a discharge valve and a conveying pump are installed on the discharge pipe, and the temporary storage box is connected to the discharge valve.

[0015] By adopting the above technical solution, the conveying device temporarily stores the activated carbon solution prepared by the stirring device through the temporary storage box, and after the stirring tank is emptied, the next tank of activated carbon solution is prepared in time, thereby improving production efficiency.

[0016] Optionally, the conveying device also includes a refining mechanism for grinding the activated carbon particles in the activated carbon solution, the refining mechanism is provided with a refining box, a grinding pump and a circulating pump, the refining box is connected to the conveying pump through a discharge pipe, the circulating pump is connected to the bottom of the refining box, the grinding pump is installed on the top of the refining box, the circulating pump is connected to the feed port of the grinding pump through a circulation pipe, and the discharge port of the grinding pump is connected to the refining box.

[0017] By adopting the above technical scheme, when the COD emergency treatment system has higher requirements on the solubility of activated carbon in water and the fineness of activated carbon, the solution in the refining box is transported to the grinding pump for grinding and refining through the circulation pump of the refining mechanism, so that the activated carbon particles in the activated carbon aqueous solution are finer and the solubility of activated carbon in water is higher, which helps to improve the quality and efficiency of the COD emergency treatment system for wastewater treatment.

[0018] Optionally, the refinement mechanism also includes a first electric valve provided on the circulation pipeline between the circulation pump and the grinding pump, a feeding pipeline for adding the mixture to the COD emergency treatment system is connected between the first electric valve and the circulation pump, and a second electric valve is provided on the feeding pipeline.

[0019] By adopting the above technical solution, by arranging a first electric valve on the circulation pipeline between the circulation pump and the grinding pump, and arranging a dosing pipeline and a second electric valve between the first electric valve and the circulation pump, it is helpful to control the flow direction of the activated carbon solution transported by the circulation pump. When the first electric valve is opened and the second electric valve is closed, the activated carbon solution flows to the grinding pump to grind and refine the activated carbon solution. When the first electric valve is closed and the second electric valve is opened, the activated carbon solution is transported to the COD emergency treatment system through the dosing pipeline.

[0020] Optionally, a filter is installed on the refinement box, the feed port of the filter is connected to the delivery pump through the discharge pipe, and the discharge port of the filter is connected to the refinement box.

[0021] By adopting the above technical scheme, the activated carbon solution entering the refinement box through the discharge pipe is filtered through the filter, so that the sundries and impurities in the activated carbon solution mixed by the stirring device are filtered through the filter, thereby improving the purity of the activated carbon solution and helping to improve the quality of the activated carbon solution added to the COD emergency treatment system.

[0022] Optionally, a dust collector is provided on the top of the silo for collecting dust generated when the activated carbon is loaded.

[0023] By adopting the above technical solution, the dust generated when the activated carbon is loaded is collected by the dust collector on the top of the silo, which helps to reduce the pollution to the environment caused by the activated carbon loading.

[0024] In the second aspect, the present application provides a control method for a dosing device for emergency treatment of refractory COD, which adopts the following technical solution: A control method using the above-mentioned refractory COD emergency treatment dosing device comprises the following steps: S1. Set the dosage and concentration ratio of activated carbon according to the COD concentration and treatment volume of the wastewater; S2. Weigh the weight of activated carbon sufficient for mixing and stirring once; S3. Measuring the amount of water used to prepare the activated carbon by weight in step S2; S4. Mix and stir the activated carbon and water according to a preset time; S5. Filter and temporarily store the mixed activated carbon solution; S6. Grind and refine the temporarily stored activated carbon solution; S7. Add the ground activated carbon solution into the COD emergency treatment system.

[0025] By adopting the above technical scheme, the dosage and concentration ratio of activated carbon are set according to the COD concentration and treatment volume of the wastewater, the weight of activated carbon sufficient for one mixing and stirring is weighed, the amount of water is measured, the activated carbon and water are mixed and stirred according to a preset time, the impurities of the stirred and mixed activated carbon solution are filtered and temporarily stored, the temporarily stored activated carbon solution is ground and refined, and finally the ground and refined activated carbon solution is added to the COD emergency treatment system, the accuracy of the activated carbon concentration ratio is improved by weighing the activated carbon and measuring the weight of water, and the activated carbon solution is stirred and ground and refined to make it more evenly dispersed and more active, which helps to improve the effect of the COD treatment system in treating wastewater.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. Weighing the activated carbon and metering the water can help improve the accuracy of the ingredients. The activated carbon is stirred by a stirring device so that the stirred activated carbon is evenly dispersed. The stirred activated carbon solution is transported to the COD treatment system through a conveying device, which helps improve the effect of the COD treatment system on wastewater treatment. 2. The feeding vibrator and the feeding electric valve are used together to transport all the activated carbon raw materials weighed in the hopper to the stirring device. At the same time, the feeding pipe is movably connected to the stirring device, which helps to accurately control the amount of activated carbon added when weighing the activated carbon raw materials in the hopper; 3. Install a water flow valve on the water inlet pipe to measure the water entering the mixing tank and control the total amount of water entering the mixing tank each time the activated carbon ingredients are added, so as to control the concentration of the activated carbon solution and help to accurately control the concentration of the activated carbon solution; 4. The conveying device temporarily stores the activated carbon solution prepared by the stirring device through the temporary storage box, and after the stirring tank is emptied, the next tank of activated carbon solution is prepared in time, which improves the production efficiency; 5. The circulating pump of the refinement mechanism transports the solution in the refinement box to the grinding pump for grinding and refinement, so that the activated carbon particles in the activated carbon aqueous solution are finer and the solubility of activated carbon in water is higher, which helps to improve the quality and efficiency of COD emergency treatment system for wastewater treatment; 6. The activated carbon solution entering the refinement box through the discharge pipe is filtered through the filter, so that the sundries and impurities in the activated carbon solution mixed by the stirring device are filtered through the filter, which improves the purity of the activated carbon solution and helps to improve the quality of the activated carbon solution added to the COD emergency treatment system; 7. Improve the accuracy of activated carbon concentration ratio by weighing activated carbon and metering water. Refine the activated carbon solution by stirring and grinding to make the activated carbon more evenly dispersed and more active, which helps to improve the effect of COD treatment system in treating wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of a dosing device for emergency treatment of difficult-to-degrade COD disclosed in this application.

[0028] Figure 2 The present invention discloses a flow chart of a control method for a dosing device for emergency treatment of refractory COD.

[0029] Description of reference numerals: 1. Silo; 11. Feeding pipe; 12. Feeding electric valve; 13. Frame; 14. Dust collector; 2. Weighing mechanism; 21. Hopper; 22. Weighing sensor; 23. Discharge vibrator; 24. Discharge electric valve; 25. Discharge pipe; 3. Stirring device; 31. Stirring tank; 311. Inlet; 32. Stirrer; 321. Stirring shaft; 322. Stirring blade; 33. Stirring motor; 34. Inlet flow valve; 35. Inlet pipe; 36. Discharge valve; 4. Conveying device; 41. Temporary storage box; 42. Discharge pipe; 43. Discharge valve; 44. Conveying pump; 45. Refining mechanism; 451. Refining box; 452. Grinding pump; 453. Circulation pump; 454. First electric valve; 455. Dosing pipe; 456. Second electric valve; 457. Filter; 458. Circulation pipe. DETAILED DESCRIPTION

[0030] The following combination Figure 1 to Figure 2 This application is described in further detail.

[0031] The embodiment of the present application discloses a dosing device for emergency treatment of refractory COD.

[0032] A dosing device for emergency treatment of refractory COD. Figure 1 and Figure 2, including a silo 1 for storing activated carbon, the silo 1 is supported and fixed on the ground by a frame 13, the silo 1 is provided with a feeding pipe 11 for conveying the activated carbon to the silo 1, the activated carbon raw material transported by the transport vehicle is pumped to the silo 1 through the feeding pipe 11, and a dust collector 14 for collecting dust generated when the activated carbon is fed is provided on the top of the silo 1, the dust generated when the activated carbon is fed is collected by the dust collector 14 on the top of the silo 1, which helps to reduce the pollution caused to the environment when the activated carbon is fed; a feeding electric valve 12 is provided at the bottom of the silo 1, the feeding electric valve 12 of the embodiment of the present application is an electric rotary valve, and the electric rotary valve helps to accurately convey the activated carbon raw material, the dosing device also includes a weighing mechanism 2, the weighing mechanism 2 is used to weigh the activated carbon, the weighing mechanism 2 includes a hopper 21 and a weighing sensor 22, the weighing sensor 22 is installed on the frame 13, and the hopper 21 is supported on the weighing The weighing sensor 22 is located at the bottom of the silo 1, the hopper 21 is connected to the feeding electric valve 12 of the silo 1, and the dosing device also includes a stirring device 3 connected to the hopper 21, the stirring device 3 is used to receive the weighed activated carbon and add water quantitatively for stirring; and a conveying device 4 is connected to the stirring device 3, and is used to convey the stirred activated carbon aqueous solution to the COD treatment system; the activated carbon raw material is stored in the silo 1, and when the ingredients are needed, the feeding electric valve 12 at the bottom of the silo 1 feeds the hopper 21 of the weighing mechanism 2, and the weighed activated carbon is conveyed to the stirring device 3 through the feeding electric valve 12, the stirring device 3 adds water quantitatively to the weighed activated carbon raw material, and stirs it, and the stirred activated carbon solution is conveyed to the COD treatment system through the conveying device 4, the amount of activated carbon added in the stirring device 3 is accurate, and the activated carbon is evenly dispersed after stirring, which helps to improve the wastewater treatment effect of the COD treatment system.

[0033] Reference Figure 1The weighing mechanism 2 also includes a discharge vibrator 23 and a discharge electric valve 24. The discharge vibrator 23 is fixed on the side wall of the hopper 21. The discharge electric valve 24 is installed at the discharge port of the hopper 21. The discharge electric valve 24 of the embodiment of the present application is also an electric rotary valve. The end of the discharge electric valve 24 away from the hopper 21 is connected to the stirring device 3 through a discharge pipe 25. The discharge pipe 25 is movably connected to the stirring device 3. The end of the discharge pipe 25 away from the stirring tank 31 of the embodiment of the present application is provided with a feed port 311. The outer wall of the discharge pipe 25 and the feed port 311 are clearance-matched. The discharge pipe 25 has a certain movable space relative to the feed port 311. The discharge pipe 25 is passed through the feed port 311, which helps to prevent the activated carbon entering the stirring tank 31 from generating dust. The outer wall of the discharge pipe 25 and the feed port 311 are clearance-matched. When the activated carbon in the hopper 21 is weighed, it helps to prevent the discharge pipe from 25 has an impact on the weighing result. In other embodiments of the present application, the discharge pipe 25 is a soft bag connecting pipe, which is made of a canvas bag. The soft bag connecting pipe must be connected to the discharge electric valve 24, and the other end is fixed to the feed port 311. In this way, when the discharge electric valve 24 is opened, the material is discharged through the soft bag connecting pipe. When the activated carbon in the hopper 21 is weighed, it is connected to the feed port 311 through the soft bag connecting pipe, and the soft belt connecting pipe will not affect the weighing result; the discharge vibrator 23 and the discharge electric valve 24 are used in combination, so that all the activated carbon raw materials weighed in the hopper 21 can be transported to the stirring device 3. At the same time, the discharge pipe 25 is movably connected to the stirring device 3. When the activated carbon raw material in the hopper 21 is weighed, it helps to reduce the influence of the connection between the discharge pipe 25 and the stirring device 3 on the weighing result of the activated carbon raw material, and helps to accurately control the amount of activated carbon added.

[0034] Reference Figure 1 The stirring device 3 includes a stirring tank 31, an agitator 32, a stirring motor 33, a water inlet flow valve 34 and a water inlet pipe 35. The water inlet pipe 35 is connected to the stirring tank 31. The water inlet flow valve 34 is used to measure the total amount of water entering the stirring tank 31 at one time on the water inlet pipe 35. The agitator 32 is placed in the stirring tank 31. The agitator 32 includes a stirring shaft 321 and a stirring blade 322. The stirring motor 33 is fixed on the upper cover of the stirring tank 31. The stirring motor 33 is connected to the agitator 32 in a transmission connection. The upper cover of the stirring tank 31 is provided with a feed inlet 311. The feed inlet 311 is penetrated by the feed pipe 25. A discharge valve 36 is provided at the bottom of the stirring tank 31. The discharge valve 36 is connected to the conveying device 4. The water inlet pipe 35 is connected to the stirring tank 31. The water inlet flow valve 34 is installed on the water inlet pipe 35 to control the total amount of water entering the stirring tank 31 each time the activated carbon ingredients are dosed, so that the concentration of the activated carbon solution can be controlled, which is helpful to accurately control the concentration of the activated carbon solution.

[0035] Reference Figure 1The conveying device 4 includes a temporary storage box 41, a discharge pipe 42 connected to the bottom of the temporary storage box 41, a discharge valve 43 and a conveying pump 44 are installed on the discharge pipe 42, the temporary storage box 41 is connected to the discharge valve 36, and the conveying device 4 temporarily stores the activated carbon solution prepared by the stirring device 3 through the temporary storage box 41. After the stirring tank 31 is emptied, the next tank of activated carbon solution is prepared in time, thereby improving production efficiency.

[0036] Reference Figure 1 The conveying device 4 also includes a refining mechanism 45 for grinding the activated carbon particles in the activated carbon solution. The refining mechanism 45 is provided with a refining box 451, a grinding pump 452 and a circulation pump 453. The refining box 451 is connected to the conveying pump 44 through the discharge pipe 42, the circulation pump 453 is connected to the bottom of the refining box 451, the grinding pump 452 is installed on the top of the refining box 451, the circulation pump 453 is connected to the feed port of the grinding pump 452 through the circulation pipe, and the discharge port of the grinding pump 452 is connected to the refining box 451. When the COD emergency treatment system has higher requirements on the solubility of activated carbon in water and the fineness of activated carbon, the solution in the refining box 451 is transported to the grinding pump 452 for grinding and refining through the circulation pump 453 of the refining mechanism 45, so that the activated carbon particles in the aqueous solution of activated carbon are finer. As the fineness of the activated carbon increases, the surface area of ​​the activated carbon per unit weight increases, the solubility of the activated carbon in water is higher, and it has higher activity, which helps to improve the effect of the COD emergency treatment system on the treatment of wastewater.

[0037] Reference Figure 1The refinement mechanism 45 also includes a first electric valve 454 provided on a circulation pipeline 458 between the circulation pump 453 and the grinding pump 452, and a feeding pipeline 455 for feeding the mixed material to the COD emergency treatment system is set between the first electric valve 454 and the circulation pump 453, and a second electric valve 456 is provided on the feeding pipeline 455; it should be noted that the grinding pump 452 grinds the material through the high shear force and friction between the high-speed rotating rotor and the stator, the liquid is brought into the inlet of the pump and dispersed between the blades, and the particles are sheared and rubbed, which makes the particles decomposed into smaller particles and mixed evenly with the liquid. The rotor of the grinding pump 452 is located in the stator. It should be noted that the gap between the two components is usually very small, and it is necessary to grind the activated carbon particles according to the The fineness is selected, and this application does not make any limitation. Around the pump body, the liquid is compressed and accelerated. When squeezed, the activated carbon solid particles are sheared and ground, and the mixing effect is good. By setting a first electric valve 454 on the circulation pipe 458 between the circulation pump 453 and the grinding pump 452, and setting a dosing pipe 455 and a second electric valve 456 between the first electric valve 454 and the circulation pump 453, it is helpful to control the flow direction of the activated carbon solution transported by the circulation pump 453. When the first electric valve 454 is opened and the second electric valve 456 is closed, the activated carbon solution flows to the grinding pump 452 to grind and refine the activated carbon solution. When the first electric valve 454 is closed and the second electric valve 456 is opened, the activated carbon solution is transported to the COD emergency treatment system through the dosing pipe 455.

[0038] Reference Figure 1 A filter 457 is installed on the refinement box 451, and the feed port of the filter 457 is connected to the delivery pump 44 through the discharge pipe 42, and the discharge port of the filter 457 is connected to the refinement box 451; the activated carbon solution entering the refinement box 451 through the discharge pipe 42 is filtered by the filter 457, and the filter mesh of the filter 457 is larger than the particle size of the activated carbon. The filter 457 filters the sundries and impurities in the stirred and mixed activated carbon solution, thereby improving the purity of the activated carbon solution and helping to improve the quality of the activated carbon solution added to the COD emergency treatment system.

[0039] The embodiment of the present application also discloses a control method for a dosing device for emergency treatment of refractory COD.

[0040] A control method using the above-mentioned refractory COD emergency treatment dosing device, referring to Figure 2 , including the following steps: S1. Set the dosage and concentration ratio of activated carbon according to the COD concentration and treatment volume of the wastewater; S2. Weigh the weight of activated carbon sufficient for mixing and stirring once; S3. Measuring the amount of water used to prepare the activated carbon by weight in step S2; S4. Mix and stir the activated carbon and water according to a preset time; S5. Filter and temporarily store the mixed activated carbon solution; S6. Grind and refine the temporarily stored activated carbon solution; S7. Add the ground activated carbon solution into the COD emergency treatment system.

[0041] The dosage and concentration ratio of activated carbon are set according to the COD concentration and treatment volume of the wastewater. The weight of activated carbon sufficient for one mixing and stirring is weighed and the amount of water is measured at the same time. The activated carbon and water are mixed and stirred according to the preset time. The impurities in the mixed activated carbon solution are filtered and temporarily stored. The temporarily stored activated carbon solution is ground and refined. Finally, the ground activated carbon solution is added to the COD emergency treatment system. The accuracy of the activated carbon concentration ratio is improved by weighing the activated carbon and measuring the weight of water. The activated carbon solution is stirred and ground to make it more evenly dispersed and more active, which helps to improve the effect of the COD treatment system in treating wastewater.

[0042] The working principle of a dosing device for emergency treatment of difficult-to-degrade COD is as follows: an activated carbon transport tanker pumps activated carbon powder to a silo 1 through a feeding pipe 11, and a dust collector 14 collects dust generated by the activated carbon powder during the feeding process. The dosage and concentration ratio of the activated carbon are set according to the COD concentration and treatment volume of the wastewater, and the feeding electric valve 12 is energized to feed the hopper 21, and the weighing sensor 22 senses the weight of the activated carbon. When the weight of the activated carbon reaches a predetermined weight, the feeding electric valve 12 is powered off to stop feeding, and the unloading electric valve 24 is powered on to open for unloading, and the unloading vibrator 23 is powered on to vibrate and unload the activated carbon unloaded in the hopper 21. While unloading, the stirring motor 33 is energized to drive the stirrer 32 to rotate to stir the activated carbon, and while stirring, the water inlet flow valve 34 is opened to add water, and the amount of water added is measured, and the water addition is stopped after reaching the predetermined weight, and the stirrer 32 stirs After the predetermined stirring time, the stirring motor 33 stops stirring, the discharge valve 36 opens, the activated carbon solution flows into the temporary storage box 41, the discharge valve 43 is opened, and the activated carbon solution in the temporary storage box 41 is transported through the discharge pipe 42 and the delivery pump 44 and filtered by the filter 457 into the refinement box 451. When the activated carbon in the refinement box 451 needs to be further refined, the first electric valve 454 is opened, the second electric valve 456 is closed, the circulation pump 453 is turned on, and the activated carbon solution is pumped to the grinding pump 452 through the circulation pipe 458. The grinding pump 452 grinds and refines the activated carbon solution, and the ground and refined activated carbon solution returns to the refinement box 451. When the activated carbon in the refinement box 451 does not need to be further refined or the refinement is completed, the first electric valve 454 is closed, the second electric valve 456 is opened, the circulation pump 453 is turned on, and the activated carbon solution is pumped to the COD emergency treatment system through the dosing pipe 455.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application in sequence. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A dosing device for emergency treatment of refractory COD, comprising a silo (1) for storing activated carbon, the silo (1) being provided with a feeding pipeline (11) for conveying the activated carbon to the silo (1), and a feeding electric valve (12) being provided at the bottom of the silo (1), characterized in that: The invention also includes a weighing mechanism (2) for weighing the activated carbon, wherein the weighing mechanism (2) includes a hopper (21) and a weighing sensor (22), wherein the hopper (21) is located at the bottom of the silo (1) and is supported on the weighing sensor (22), wherein the hopper (21) is connected to the feeding electric valve (12) of the silo (1), and further includes a stirring device (3) connected to the hopper (21), wherein the stirring device (3) is used to receive the weighed activated carbon and add water in a fixed amount for stirring; and a conveying device (4) connected to the stirring device (3) for conveying the stirred activated carbon aqueous solution to the COD treatment system.

2. The device for emergency treatment of refractory COD according to claim 1, characterized in that: The weighing mechanism (2) further comprises a material discharge vibrator (23) and a material discharge electric valve (24); the material discharge vibrator (23) is fixed on the side wall of the hopper (21); the material discharge electric valve (24) is installed at the discharge port of the hopper (21); one end of the material discharge electric valve (24) away from the hopper (21) is connected to the stirring device (3) via a material discharge pipe (25); and the material discharge pipe (25) is movably connected to the stirring device (3).

3. The device for emergency treatment of refractory COD according to claim 2, characterized in that: The stirring device (3) comprises a stirring tank (31), a stirrer (32), a stirring motor (33), a water inlet pipe (35) connected to the stirring tank (31), and a water inlet flow valve (34) installed on the water inlet pipe (35); the stirrer (32) is placed in the stirring tank (31); the stirring motor (33) is fixed on the upper cover of the stirring tank (31); the stirring motor (33) is transmission-connected to the stirrer (32); the upper cover of the stirring tank (31) is provided with a material inlet (311); the discharge pipe (25) is connected to the material inlet (311); a discharge valve (36) is provided at the bottom of the stirring tank (31); and the discharge valve (36) is connected to the conveying device (4).

4. The device for emergency treatment of refractory COD according to claim 3 is characterized in that: The feed inlet (311) is provided at one end of the feed discharge pipe (25) away from the stirring tank (31), and the outer wall of the feed discharge pipe (25) is clearance-matched with the feed inlet (311).

5. The device for emergency treatment of refractory COD according to claim 3 is characterized in that: The conveying device (4) comprises a temporary storage box (41), a discharge pipe (42) connected to the bottom of the temporary storage box (41), a discharge valve (43) and a conveying pump (44) are installed on the discharge pipe (42), and the temporary storage box (41) is connected to the discharge valve (36).

6. The device for emergency treatment of refractory COD according to claim 5, characterized in that: The conveying device (4) further comprises a refining mechanism (45) for grinding activated carbon particles in the activated carbon solution, wherein the refining mechanism (45) is provided with a refining box (451), a grinding pump (452) and a circulation pump (453), wherein the refining box (451) is connected to the conveying pump (44) via a discharge pipe (42), the circulation pump (453) is connected to the bottom of the refining box (451), the grinding pump (452) is installed on the top of the refining box (451), the circulation pump (453) is connected to the feed port of the grinding pump (452) via a circulation pipe (458), and the discharge port of the grinding pump (452) is connected to the refining box (451).

7. The device for emergency treatment of refractory COD according to claim 6, characterized in that: The refinement mechanism (45) further includes a first electric valve (454) provided on the circulation pipeline (458) between the circulation pump (453) and the grinding pump (452), a feeding pipeline (455) for feeding the mixed material to the COD emergency treatment system is connected between the first electric valve (454) and the circulation pump (453), and a second electric valve (456) is provided on the feeding pipeline (455).

8. The device for emergency treatment of refractory COD according to claim 7, characterized in that: A filter (457) is installed on the refinement box (451), the feed port of the filter (457) is connected to the delivery pump (44) through the discharge pipe (42), and the discharge port of the filter (457) is connected to the refinement box (451).

9. The device for emergency treatment of refractory COD according to claim 8, characterized in that: A dust collector (14) is provided on the top of the silo (1) for collecting dust generated when the activated carbon is loaded.

10. A control method using the dosing device for emergency treatment of refractory COD according to any one of claims 1 to 9, characterized in that: The steps include: S1. Set the dosage and concentration ratio of activated carbon according to the COD concentration and treatment volume of the wastewater; S2. Weigh the weight of activated carbon sufficient for mixing once; S3. Measuring the amount of water used to prepare the activated carbon by weight in step S2; S4. Mix and stir the activated carbon and water according to a preset time; S5. Filter and temporarily store the mixed activated carbon solution; S6. Grind and refine the temporarily stored activated carbon solution; S7. Add the ground activated carbon solution into the COD emergency treatment system.

Images