Organic cleaning wastewater pretreatment device

Abstract

The utility model discloses an organic cleaning wastewater pretreatment device which is characterized by comprising a wastewater adjusting tank, a first Fenton oxidation tank, a second Fenton oxidation tank, a degassing tank, a pH adjusting tank, a coagulation tank, a flocculation tank, an inclined tube sedimentation tank, a callback tank, an intermediate water tank, a quartz sand filter and a clean water tank which are connected in sequence, the device has the advantages that organic pollutants which are difficult to degrade in organic wastewater are effectively decomposed by arranging the Fenton device, the occupied area is small, the device is simple and easy to operate and convenient to operate and manage, meanwhile, the aeration device is arranged in the Fenton pool and can assist the Fenton pool to uniformly stir the wastewater in the pool, and the whole device has the effects of small occupied area, low cost and high efficiency. The device has the advantages of high treatment capacity, quick effect, low energy consumption and easiness in maintenance.

Description

Technical Field

[0001] The utility model relates to the field of wastewater treatment, in particular to an organic cleaning wastewater pretreatment device. Background Art

[0002] At present, organic wastewater has gradually become a major problem in the field of wastewater treatment at home and abroad. There are certain limitations in the treatment of organic wastewater in the field of environmental protection. For example, it is difficult to achieve the treatment purpose by directly using biological treatment of organic wastewater. Therefore, before biochemical treatment, organic wastewater needs to be physically and chemically treated to decompose the difficult-to-degrade macromolecular organic pollutants into small molecular pollutants. The existing methods usually use coagulation and sedimentation, flotation, membrane separation, electrolysis, adsorption, ion exchange and chemical oxidation to treat wastewater. However, these methods have the problems of high cost, incomplete treatment and low degree of integration. Utility Model Content

[0003] The purpose of the utility model is to solve the above technical problems and to provide an organic cleaning wastewater pretreatment device which occupies a small area, has low cost, large processing capacity, quick effect, low energy consumption and is easy to maintain.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An organic cleaning wastewater pretreatment device is characterized by comprising a wastewater regulating tank, a first Fenton oxidation tank, a second Fenton oxidation tank, a degassing tank, a pH regulating tank, a coagulation tank, a flocculation tank, an inclined tube sedimentation tank, a callback tank, an intermediate water tank, a quartz sand filter and a clear water tank which are connected in sequence.

[0006] A further preferred technical solution is that the wastewater regulating tank and the first Fenton oxidation tank are connected via a wastewater lifting pump, and the intermediate water tank and the quartz sand filter are connected via an intermediate water pump.

[0007] A further preferred technical solution is that the first Fenton oxidation tank is connected to a first sulfuric acid dosing device and a ferrous sulfate dosing device, the second Fenton oxidation tank is connected to a hydrogen peroxide dosing device, the pH adjustment tank is connected to a sodium hydroxide dosing device, the coagulation tank is connected to a polyaluminium chloride dosing device, the flocculation tank is connected to a polyacrylamide dosing device, and the callback tank is connected to a second sulfuric acid dosing device.

[0008] A further preferred technical solution is that the first sulfuric acid dosing device, ferrous sulfate dosing device, hydrogen peroxide dosing device, sodium hydroxide dosing device, polyaluminium chloride dosing device, polyacrylamide dosing device and the second sulfuric acid dosing device are all provided with a metering pump for controlling the dosing flow rate, and the first Fenton oxidation tank, pH adjustment tank and callback tank are all provided with a pH meter electrically connected to the first sulfuric acid dosing device, sodium hydroxide dosing device and the second sulfuric acid dosing device.

[0009] A further preferred technical solution is that the first Fenton oxidation tank, the second Fenton oxidation tank and the degassing tank are all provided with aeration pipelines, and the aeration pipelines are all connected to the output end of the fan.

[0010] A further preferred technical solution is that spiral agitators are provided in the pH adjustment tank, coagulation tank, flocculation tank and callback tank.

[0011] A further preferred technical solution is that water level meters are provided in the wastewater regulating tank, the intermediate water tank and the clear water tank.

[0012] A further preferred technical solution is that a sludge discharge outlet is provided at the bottom of the inclined tube sedimentation tank, the sludge discharge outlet is connected to the filter press through a sewage pipe and a filter press pump, each of the sludge discharge outlets is provided with a sewage branch pipe, the sewage branch pipes are connected to the sewage pipe, the filter press is connected to the wastewater regulating tank through a drainage pipe, and the drainage pipe is provided with a water pump.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model effectively decomposes the difficult-to-degrade organic pollutants in the organic wastewater by setting up a Fenton device, occupies a small area, is simple and easy to operate, and has convenient operation and management. At the same time, an aeration device is set in the Fenton tank to assist the Fenton tank in stirring the wastewater in the tank evenly. The overall device has the effects of occupying a small area, low cost, large processing capacity, quick effect, low energy consumption, and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] In the figure: 1. Wastewater regulating tank; 2. Water level meter; 3. Wastewater lifting pump; 4. First Fenton oxidation tank; 5. Degassing tank; 6. pH adjustment tank; 7. Coagulation tank; 8. Flocculation tank; 9. Inclined tube sedimentation tank; 10. Callback tank; 11. Intermediate water tank; 12. Intermediate water pump; 13. Quartz sand filter; 14. Clear water tank; 15. Second Fenton oxidation tank; 16. pH meter; 17. Fan; 18. First sulfuric acid dosing device; 19. Ferrous sulfate dosing device; 20. Hydrogen peroxide dosing device; 21. Metering pump; 22. Sodium hydroxide dosing device; 23. Polyaluminium chloride dosing device; 24. Polyacrylamide dosing device; 25. Spiral agitator; 26. Second sulfuric acid dosing device; 27. Sewage branch pipe; 28. Sewage pipeline; 29. ​​Filter press pump; 30. Filter press; 31. Aeration pipeline. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0017] Embodiment 1

[0018] like Figure 1 As shown, an organic cleaning wastewater pretreatment device comprises a wastewater regulating tank 1, a first Fenton oxidation tank 4, a second Fenton oxidation tank 15, a degassing tank 5, a pH regulating tank 6, a coagulation tank 7, a flocculation tank 8, an inclined tube sedimentation tank 9, a callback tank 10, an intermediate water tank 11, a quartz sand filter 13 and a clear water tank 14 connected in sequence. Specifically, a further preferred technical solution is that the wastewater regulating tank 1 and the first Fenton oxidation tank 4 are connected via a wastewater lifting pump 3, and the intermediate water tank 11 and the quartz sand filter 13 are connected via an intermediate water pump 12. The water in the water tank is lifted to a high place by the wastewater lifting pump 3 and the intermediate water pump 12.

[0019] Specifically, a further preferred technical solution is that the first Fenton oxidation tank 4 is connected with a first sulfuric acid dosing device 18 and a ferrous sulfate dosing device 19, the second Fenton oxidation tank 15 is connected with a hydrogen peroxide dosing device 20, the pH adjustment tank 6 is connected with a sodium hydroxide dosing device 22, the coagulation tank 7 is connected with a polyaluminium chloride dosing device 23, the flocculation tank 8 is connected with a polyacrylamide dosing device 24, and the callback tank 10 is connected with a second sulfuric acid dosing device 26. The sulfuric acid dosing device is used to adjust the pH value of the wastewater. Only when the pH value of the wastewater reaches 3 to 4 can the Fenton reaction be better carried out. In addition, in this embodiment, the sulfuric acid used is dilute sulfuric acid to avoid explosion. The polyaluminium chloride dosing device is PAC, and the polyacrylamide dosing device is PAM, both of which are common reagents. No further elaboration is given here. Further preferred technical solutions include: a first sulfuric acid dosing device 18, a ferrous sulfate dosing device 19, a hydrogen peroxide dosing device 20, a sodium hydroxide dosing device 22, a polyaluminium chloride dosing device 23, a polyacrylamide dosing device 24, and a second sulfuric acid dosing device 26 are all provided with a metering pump 21 for controlling the dosing flow rate, and a first Fenton oxidation tank 4, a pH adjustment tank 6, and a callback tank 10 are all provided with a pH meter 16 electrically connected to the first sulfuric acid doser 18, the sodium hydroxide doser 22, and the second sulfuric acid doser 26. The measured value of the pH meter is fed back to the metering pump, so that the metering pump can meter the medicine. A further preferred technical solution is that the first Fenton oxidation tank 4, the second Fenton oxidation tank 15 and the degassing tank 4 are all provided with an aeration pipeline 31, and the aeration pipeline 31 is connected to the output end of the fan 17. The aeration pipeline is set in the Fenton oxidation tank to enable better stirring in the Fenton tank. The aeration pipeline of the degassing tank is mainly used to remove excess hydrogen peroxide, and the hydrogen peroxide is decomposed into water and oxygen through aeration to escape.

[0020] A further preferred technical solution is that the pH regulating tank 6, the coagulation tank 7, the flocculation tank 8 and the callback tank 10 are all provided with a spiral agitator 25 to help the medicine and the wastewater to be more fully mixed. A further preferred technical solution is that the wastewater regulating tank 1, the intermediate water tank 11 and the clear water tank 14 are all provided with a water level meter 2. A further preferred technical solution is that a sludge discharge port is provided at the bottom of the inclined tube sedimentation tank 9, and the sludge discharge port is connected to the filter press 30 through a sewage pipe 28 and a filter press pump 29, and each sewage outlet is provided with a sewage branch pipe 27, and the sewage branch pipe 27 is connected to the sewage pipe 28, and the filter press 30 is connected to the wastewater regulating tank 1 through a drainage pipe, and the drainage pipe is provided with a pumping pump.

[0021] The working process of the utility model is as follows: when in use, the organic wastewater first enters the wastewater regulating tank 1, the wastewater regulating tank 1 mainly functions to regulate the water volume and the sewage concentration so as to reach the standard of entering the Fenton tank, and then is lifted by the lifting pump 2 to the first Fenton oxidation tank 4, sulfuric acid is added to the first Fenton oxidation tank 4 to adjust the pH value, and ferrous sulfate is added to introduce iron ions, and then enters the second Fenton oxidation tank 15, and the Fenton reaction is carried out by adding hydrogen peroxide, and the fan is turned on at the same time to ventilate the aeration pipe in the Fenton oxidation tank to assist in stirring, and then the wastewater enters the degassing tank 5, and the excess hydrogen peroxide is removed in the degassing tank 5, and the hydrogen peroxide is decomposed into water and oxygen by aeration to escape, and then the organic wastewater enters Enter the pH adjustment tank 6, add sodium hydroxide to the pH adjustment tank 6, then enter the coagulation tank 7, add PAC in the coagulation tank, coagulation occurs under appropriate pH conditions, then enter the flocculation tank 8 with PAM added, flocculate into precipitate under the action of PAM, and then enter the inclined tube sedimentation tank 9 to precipitate the formed flocculated precipitate, the precipitated mud water in the inclined tube sedimentation tank 9 is pumped to the filter press 13 by the filter press pump 12 to be filtered into a mud cake, and the filtrate after filtration returns to the wastewater regulating tank 1, the treated wastewater enters the callback tank for callback, adjusts the pH value of the wastewater, and then enters the intermediate water tank 11, and then is lifted by the intermediate water pump 12 to the quartz sand filter 13 device for treatment, and then enters the clear water tank 14 for discharge.

[0022] The utility model is provided with a Fenton device to effectively decompose the difficult-to-degrade organic pollutants in the organic wastewater, has a small footprint, is simple and easy to operate, and has convenient operation and management. At the same time, an aeration device is provided in the Fenton tank to assist the Fenton tank in stirring the wastewater in the tank evenly. The overall device has the effects of small footprint, low cost, large processing capacity, quick effect, low energy consumption, and easy maintenance.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An organic cleaning wastewater pretreatment device, characterized in that: It includes a wastewater regulating tank, a first Fenton oxidation tank, a second Fenton oxidation tank, a degassing tank, a pH regulating tank, a coagulation tank, a flocculation tank, an inclined tube sedimentation tank, a callback tank, an intermediate water tank, a quartz sand filter and a clear water tank which are connected in sequence.

2. The organic cleaning wastewater pretreatment device according to claim 1, characterized in that: The wastewater regulating tank and the first Fenton oxidation tank are connected via a wastewater lifting pump, and the intermediate water tank and the quartz sand filter are connected via an intermediate water pump.

3. The organic cleaning wastewater pretreatment device according to claim 1, characterized in that: The first Fenton oxidation tank is connected to a first sulfuric acid dosing device and a ferrous sulfate dosing device, the second Fenton oxidation tank is connected to a hydrogen peroxide dosing device, the pH adjustment tank is connected to a sodium hydroxide dosing device, the coagulation tank is connected to a polyaluminium chloride dosing device, the flocculation tank is connected to a polyacrylamide dosing device, and the callback tank is connected to a second sulfuric acid dosing device.

4. The organic cleaning wastewater pretreatment device according to claim 3, characterized in that: The first sulfuric acid dosing device, ferrous sulfate dosing device, hydrogen peroxide dosing device, sodium hydroxide dosing device, polyaluminium chloride dosing device, polyacrylamide dosing device and the second sulfuric acid dosing device are all provided with metering pumps for controlling the dosing flow rate, and the first Fenton oxidation tank, pH adjustment tank and callback tank are all provided with pH meters electrically connected to the first sulfuric acid dosing device, sodium hydroxide dosing device and the second sulfuric acid dosing device.

5. The organic cleaning wastewater pretreatment device according to claim 1, characterized in that: The first Fenton oxidation tank, the second Fenton oxidation tank and the degassing tank are all provided with aeration pipelines, and the aeration pipelines are all connected to the output end of the fan.

6. The organic cleaning wastewater pretreatment device according to claim 1, characterized in that: The pH regulating tank, the coagulation tank, the flocculation tank and the adjustment tank are all provided with spiral stirrers.

7. The organic cleaning wastewater pretreatment device according to claim 1, characterized in that: The wastewater regulating tank, the intermediate water tank and the clear water tank are all provided with water level meters.

8. The organic cleaning wastewater pretreatment device according to claim 1, characterized in that: A sludge discharge outlet is provided at the bottom of the inclined tube sedimentation tank, and the sludge discharge outlet is connected to the filter press through a sewage pipe and a filter press pump. Each sludge discharge outlet is provided with a sewage branch pipe, and the sewage branch pipes are connected to the sewage pipe. The filter press is connected to the wastewater regulating tank through a drainage pipe, and the drainage pipe is provided with a water pump.

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