Sewage treatment device and sewage treatment method

Abstract

The invention relates to a sewage treatment device and a sewage treatment method. The centrifugal separator is arranged at a light output end and a heavy output end, the magnetic separator is arranged below the heavy output end, the output end of the steam separator faces the magnetic separator, the collecting box is arranged below the magnetic separator, and the ultrasonic separation pool is connected with the light output end. The ultrasonic generator is positioned in the ultrasonic separation tank; and the low-temperature separator is arranged on the ultrasonic separation tank. According to the sewage treatment device and the sewage treatment method disclosed by the invention, the metal scraps in the sewage are classified according to the volume and then are treated respectively, so that the separation degree of the metal scraps and grease can be effectively improved through the treatment mode, and a better treatment effect can be obtained.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a sewage treatment device and a sewage treatment method. Background Art

[0002] Oily metal wastewater is difficult to treat due to the adhesion of grease, the large number of metal debris and the small size of metal debris. The use of filtration treatment methods can easily lead to filter blockage, requiring repeated regeneration or replacement of filter materials. Regeneration requires the use of high temperatures, and the generated exhaust gas also needs to be treated twice, and the replaced filter materials also need to be treated twice. The use of adsorption methods also faces the problem of the need for regeneration and secondary treatment of adsorption materials.

[0003] Of course, there is also the option of using sedimentation treatment, which requires the use of flocculants, and the resulting sediment contains a mixture of grease and metal debris, which still cannot be separated. Summary of the invention

[0004] The present application provides a sewage treatment device and a sewage treatment method, which classifies metal debris in sewage according to volume and then treats them separately. This treatment method can effectively improve the separation degree of metal debris and grease, and can obtain better treatment effects.

[0005] The above-mentioned purpose of the present application is achieved through the following technical solutions: In a first aspect, the present application provides a sewage treatment device, comprising: A centrifugal separator having an input end, a light output end and a heavy output end; A magnetic separator is located below the heavy output end; A steam separator, wherein the output end of the steam separator faces the magnetic separator; A collection box is arranged below the magnetic separator; An ultrasonic separation tank is connected to the light output end, and an ultrasonic generator is arranged in the ultrasonic separation tank; The low-temperature separator is installed on the ultrasonic separation tank.

[0006] In a possible implementation manner of the first aspect, there are multiple heavy mass output ends, and the multiple heavy mass output ends are evenly arranged on the side wall of the centrifugal separator around the axis of the centrifugal separator.

[0007] In a possible implementation manner of the first aspect, the heavy-weight output end includes: A connecting pipe, a first end of which is connected to the side wall of the centrifugal separator and a second end of which is located above the magnetic separator; a gate, hinged to the side wall of the centrifugal separator and located inside the connecting pipe; A first linear driver is provided on the connecting pipe and connected to the gate plate, and the first linear driver is used to drive the gate plate to swing; The gate plate is used to close the through hole on the side wall of the centrifugal separator.

[0008] In a possible implementation of the first aspect, the magnetic separator includes: A support, on which a workbench is obliquely arranged; A plurality of electromagnets are arranged at intervals inside the workbench; A controller is electrically connected to each electromagnet.

[0009] In a possible implementation manner of the first aspect, an electromagnetic coil is further provided inside the workbench, and the electromagnetic coil is electrically connected to the controller.

[0010] In a possible implementation of the first aspect, the ultrasonic separation tank includes: Pool body; A plurality of ultrasonic generators are all extended into the pool body, and the ultrasonic generators are divided into a plurality of groups, and the height of each group of ultrasonic generators in the pool body is different.

[0011] In a possible implementation of the first aspect, the low-temperature separator includes: A plurality of brackets are arranged on the pool body at intervals; A second linear actuator is disposed on the bracket; A semiconductor refrigeration plate is arranged on the second linear drive; The electric scraper is installed on the semiconductor refrigeration plate.

[0012] In a possible implementation of the first aspect, the electric scraper includes: A guide rail is provided on the semiconductor refrigeration plate; A scraper is slidably connected to the guide rail and abuts against the semiconductor refrigeration plate; A rack, arranged on a guide rail or a semiconductor refrigeration plate; The driver is arranged on the scraper and meshes with the rack.

[0013] In a second aspect, the present application provides a sewage treatment method, comprising: The sewage is separated to obtain heavy sewage containing metal debris and light sewage containing metal particles; Use magnetic suction to separate metal debris from heavy sewage; Spray steam onto metal chips to separate the oil stains on the surface of the metal chips from the metal chips; Collect steam-treated metal scraps; Ultrasonic waves are used to separate the oil on the surface of metal particles, and the oil separated from the surface of metal particles is transferred to the surface of light sewage; Use cryogenic coagulation to collect oil on the surface of light sewage; Add flocculants into light sewage to precipitate the metal particles in the light sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a sewage treatment device provided in this application.

[0015] Figure 2 It is a structural schematic diagram of another sewage treatment device provided in this application.

[0016] Figure 3 It is a structural schematic diagram of a heavy-weight output end provided by this application.

[0017] Figure 4 It is a structural schematic diagram of a magnetic separator provided in this application.

[0018] Figure 5 It is a structural schematic diagram of an ultrasonic separation tank provided in this application.

[0019] Figure 6 It is a structural schematic diagram of a low-temperature separator provided in this application.

[0020] In the figure, 1, centrifugal separator, 2, magnetic separator, 3, steam separator, 4, collecting box, 5, ultrasonic separation tank, 6, low-temperature separator, 11, input end, 12, light output end, 13, heavy output end, 21, bracket, 22, workbench, 23, electromagnet, 24, controller, 51, tank body, 52, ultrasonic generator, 61, bracket, 62, second linear drive, 63, semiconductor refrigeration plate, 64, electric scraper, 131, connecting pipe, 132, gate, 133, first linear drive, 641, guide rail, 642, scraper, 643, rack, 644, drive. DETAILED DESCRIPTION

[0021] The technical solution in this application is further described in detail below in conjunction with the accompanying drawings.

[0022] This application discloses a sewage treatment device. In some examples, see Figure 1 The sewage treatment device disclosed in the present application includes a centrifugal separator 1, a magnetic separator 2, a steam separator 3, a collecting box 4, an ultrasonic separation tank 5 and a low-temperature separator 6. In order to more clearly understand the technical solution in the present application, the technical path of the present application is first introduced.

[0023] For sewage, the treatment method of the present application is to first use a centrifugal separator 1 to separate the sewage, and divide the sewage into heavy sewage containing metal debris and light sewage containing metal particles. The metal debris and metal particles here are both metal debris. The difference is that the particle size of the metal particles is smaller than the particle size of the metal debris.

[0024] For heavy sewage, magnetic separation plus steam separation is used to separate the oil stains adhering to the metal debris; for light sewage, ultrasonic separation is used to separate the oil stains adhering to the metal particles. That is, in this application, different treatment methods are used for heavy sewage and light sewage.

[0025] The centrifugal separator 1 has an input end 11, a light output end 12 and a heavy output end 13. The sewage entering the centrifugal separator 1 performs a spiral motion around the axis of the centrifugal separator 1. During this process, metal debris and metal particles are acted upon by centrifugal force and begin to move toward the inner wall of the centrifugal separator 1. Due to their different volumes, the metal debris and metal particles are subjected to different centrifugal forces and move different distances.

[0026] The metal chips are large in size and will directly contact the inner wall of the centrifugal separator 1 during movement, and the moving speed of the metal chips will decrease.

[0027] The sewage containing metal debris (heavy sewage) flows out from the heavy output end 13, and the sewage containing metal particles (light sewage) flows out from the light output end 12. Considering the volume of the centrifugal separator 1, the sewage can be centrifugally separated for multiple times, such as Figure 2 shown.

[0028] The magnetic separator 2 is located below the heavy output end 13, and its function is to absorb the metal debris in the sewage by magnetic force and separate the metal debris from the heavy sewage. The output end of the steam separator 3 faces the magnetic separator 2, and its function is to generate steam. After the high-temperature steam contacts the metal debris, the oil on the surface of the metal debris will dissolve. At this time, the sewage obtained contains oil but no metal debris. The metal debris treated with high-temperature steam is collected and falls into the collection box 4 for unified treatment.

[0029] The ultrasonic separation tank 5 is connected to the light output end 12. An ultrasonic generator 52 is provided in the ultrasonic separation tank 5. After the light sewage flows into the ultrasonic separation tank 5, the ultrasonic generator 52 works to separate the metal particles from the oil pollution. The ultrasonic treatment method can make the oil pollution and the metal particles break away from contact and form oil pollution particles.

[0030] After a certain period of sedimentation, the metal particles will fall into the middle and lower area of ​​the ultrasonic separation tank 5. At this time, the oil particles will be collected by the low-temperature separator 6 on the ultrasonic separation tank 5. The oil particles will solidify on the low-temperature separator 6, and the oil solidified on the low-temperature separator 6 will be collected and processed.

[0031] Wastewater rich in metal particles can be treated with flocculants and then recovered by high temperature. Wastewater containing a small amount of oil can also be treated with flocculants.

[0032] In some examples, there are multiple heavy output ends 13, which are evenly arranged on the side wall of the centrifugal separator 1 around the axis of the centrifugal separator 1, in order to collect metal debris. Because the area where the metal debris appears is uncertain, the number of heavy output ends 13 needs to be increased.

[0033] Of course, a heavy material output port 13 also needs to be added to the bottom of the centrifugal separator 1 .

[0034] For some possible implementations, see Figure 3 The heavy mass output end 13 includes a connecting pipe 131, a gate plate 132 and a first linear driver 133. The first end of the connecting pipe 131 is connected to the side wall of the centrifugal separator 1, and the second end is located above the magnetic separator 2. The gate plate 132 is hinged on the side wall of the centrifugal separator 1 and is located inside the connecting pipe 131. Its function is to close the through hole on the side wall of the centrifugal separator 1.

[0035] exist Figure 3 In the embodiment, the gate plate 132 is located on the inner side of the centrifugal separator 1, so that the sealing effect of the gate plate 132 can be improved by means of water pressure. At the same time, a sealing ring can be added to the gate plate 132 and the first linear drive 133 can be used to pull in the reverse direction to improve the sealing effect of the gate plate 132.

[0036] The first linear actuator 133 is fixed on the connecting pipe 131 and connected to the gate 132. The first linear actuator 133 is used to drive the gate 132 to swing. When the gate 132 is opened, the sewage in the centrifugal separator 1 will flow into the connecting pipe 131. After the gate 132 is closed, the sewage in the centrifugal separator 1 stops flowing into the connecting pipe 131.

[0037] In some possible implementations, the first linear drive 133 uses an electric cylinder.

[0038] For some examples, see Figure 4The magnetic separator 2 includes a bracket 21, a workbench 22, an electromagnet 23 and a controller 24. The workbench 22 is tilted on the bracket 21. The electromagnets 23 are arranged at intervals inside the workbench 22. The function of the electromagnets 23 is to generate magnetic force to absorb metal debris in the sewage. The controller 24 is electrically connected to each electromagnet 23 and is responsible for controlling the power on and off of the electromagnet 23.

[0039] Furthermore, an electromagnetic coil 25 is provided inside the workbench 22, and the electromagnetic coil 25 is electrically connected to the controller 24. The function of the electromagnetic coil 25 is to heat the metal debris so that the temperature of the metal debris can be rapidly increased, so as to cooperate with the steam separator 3 to improve the decomposition effect of steam on oil pollution.

[0040] The steam separator 3 is mainly composed of three parts: a boiler, a pipeline and a nozzle. The steam generated by the boiler is transported to the nozzle through the pipeline and then sprayed out by the nozzle.

[0041] The controller 24 here can use PLC or DCS. The controller 24 is connected to the contactor to realize power on and off, and all electrical components involved in this application can be connected to the controller 24 for control.

[0042] Regarding the installation method of the electromagnet 23 and the electromagnetic coil 25 , installation holes can be reserved on the workbench 22 . After the electromagnet 23 and the electromagnetic coil 25 are placed in the corresponding installation holes, a plate made of, for example, heat-resistant ceramic material is laid on the workbench 22 to cover the electromagnet 23 and the electromagnetic coil 25 .

[0043] The metal scraps can be collected by using a scraper, which pushes the metal scraps to the higher side of the workbench 22 . The metal scraps fall from the workbench 22 and enter the collection box 4 .

[0044] For some examples, see Figure 5 The ultrasonic separation tank 5 includes a tank body 51 and an ultrasonic generator 52. The ultrasonic generator 52 is located inside the tank body 51 and can be installed using a fixing rod, for example. In addition, the ultrasonic generator 52 is divided into multiple groups, and the height of each group of ultrasonic generators 52 in the tank body 51 is different.

[0045] The space inside the tank body 51 is divided into an ultrasonic separation zone and a sedimentation zone, and the ultrasonic generators 52 are all located in the ultrasonic separation zone.

[0046] For some examples, see Figure 6 The low-temperature separator 6 includes a bracket 61, a second linear drive 62, a semiconductor refrigeration plate 63 and an electric scraper 64. There are multiple brackets 61, and these brackets 61 are arranged at intervals on the pool body 51, specifically in the sedimentation area.

[0047] The second linear actuator 62 is fixedly mounted on the bracket 61, and the semiconductor refrigeration plate 63 is fixedly mounted on the second linear actuator 62. The second linear actuator 62 drives the semiconductor refrigeration plate 63 to move in the vertical direction. The electric scraper 64 is mounted on the semiconductor refrigeration plate 63 and is responsible for collecting the oil solidified on the semiconductor refrigeration plate 63.

[0048] The electric scraper 64 includes a guide rail 641, a scraper 642, a rack 643 and a driver 644. The guide rail 641 is fixedly mounted on the semiconductor refrigeration plate 63. The scraper 642 is slidably connected to the guide rail 641 and abuts against the semiconductor refrigeration plate 63. The rack 643 is fixed on the guide rail 641 or the semiconductor refrigeration plate 63.

[0049] The driver 644 is arranged on the scraper 642, and the driver 644 includes a main body slidably connected to the rack 643, a motor installed on the main body, and a gear installed on the motor shaft, and the gear is meshed with the rack.

[0050] When the driver 644 moves on the rack 643, the scraper 642 slides back and forth on the guide rail 641. The oil stains falling from the semiconductor refrigeration plate 63 will directly fall into the storage tank on the scraper 642, and then be transported to the designated location for cleaning by the staff.

[0051] The present application also discloses a sewage treatment method, the specific method is as follows: The sewage is separated to obtain heavy sewage containing metal debris and light sewage containing metal particles; Use magnetic suction to separate metal debris from heavy sewage; Spray steam onto metal chips to separate the oil stains on the surface of the metal chips from the metal chips; Collect steam-treated metal scraps; Ultrasonic waves are used to separate the oil on the surface of metal particles, and the oil separated from the surface of metal particles is transferred to the surface of light sewage; Use cryogenic coagulation to collect oil on the surface of light sewage; Add flocculants into light sewage to precipitate the metal particles in the light sewage.

[0052] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all 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 sewage treatment device, characterized in that: include: A centrifugal separator (1) having an input end (11), a light output end (12) and a heavy output end (13); A magnetic separator (2) is provided below the heavy material output end (13); A steam separator (3), wherein the output end of the steam separator (3) faces the magnetic separator (2); A collection box (4) is arranged below the magnetic separator (2); An ultrasonic separation tank (5) is connected to the light output end (12), and an ultrasonic generator (52) is provided in the ultrasonic separation tank (5); The low temperature separator (6) is arranged on the ultrasonic separation tank (5).

2. The sewage treatment device according to claim 1, characterized in that: There are multiple heavy mass output ends (13), and the multiple heavy mass output ends (13) are evenly arranged on the side wall of the centrifugal separator (1) around the axis of the centrifugal separator (1).

3. The sewage treatment device according to claim 2, characterized in that: The heavy output end (13) comprises: A connecting pipe (131), a first end of which is connected to the side wall of the centrifugal separator (1) and a second end of which is located above the magnetic separator (2); A gate plate (132) is hinged on the side wall of the centrifugal separator (1) and is located inside the connecting pipe (131); A first linear driver (133) is disposed on the connecting pipe (131) and connected to the gate plate (132), and the first linear driver (133) is used to drive the gate plate (132) to swing; The gate plate (132) is used to close the through hole on the side wall of the centrifugal separator (1).

4. The sewage treatment device according to claim 1, characterized in that: The magnetic separator (2) comprises: A support (21), wherein a workbench (22) is obliquely arranged on the support (21); A plurality of electromagnets (23) are arranged at intervals inside the workbench (22); The controller (24) is electrically connected to each electromagnet (23).

5. The sewage treatment device according to claim 4, characterized in that: An electromagnetic coil (25) is also provided inside the workbench (22), and the electromagnetic coil (25) is electrically connected to the controller (24).

6. The sewage treatment device according to claim 1, characterized in that: The ultrasonic separation tank (5) comprises: Pool(51); A plurality of ultrasonic generators (52) are all extended into the pool body (51). The ultrasonic generators (52) are divided into a plurality of groups, and the height of each group of ultrasonic generators (52) in the pool body (51) is different.

7. The sewage treatment device according to claim 6, characterized in that: The low temperature separator (6) comprises: A plurality of brackets (61) are arranged at intervals on the pool body (51); A second linear actuator (62) is disposed on the bracket (61); A semiconductor refrigeration plate (63) is arranged on the second linear drive (62); The electric scraper (64) is arranged on the semiconductor refrigeration plate (63).

8. The sewage treatment device according to claim 7, characterized in that: The electric scraper (64) comprises: A guide rail (641) is provided on the semiconductor refrigeration plate (63); A scraper (642) is slidably connected to the guide rail (641) and abuts against the semiconductor refrigeration plate (63); A rack (643) is arranged on the guide rail (641) or the semiconductor refrigeration plate (63); The driver (644) is disposed on the scraper (642) and meshes with the rack (643).

9. A method for treating sewage, characterized in that: include: The sewage is separated to obtain heavy sewage containing metal debris and light sewage containing metal particles; Use magnetic suction to separate metal debris from heavy sewage; Spray steam onto metal chips to separate the oil stains on the surface of the metal chips from the metal chips; Collect steam-treated metal scraps; Ultrasonic waves are used to separate the oil on the surface of metal particles, and the oil separated from the surface of metal particles is transferred to the surface of light sewage; Use cryogenic coagulation to collect oil on the surface of light sewage; Add flocculants into light sewage to precipitate the metal particles in the light sewage.

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