Sewage treatment system

Abstract

A sewage treatment system comprises: at least two sewage treatment units, the adjacent sewage treatment units are connected, and the sewage treatment units are used for mixing a magnetic adsorbent and sewage; the electromagnetic device is arranged on the sewage treatment unit; and the magnetic adsorbent recovery unit is connected with each sewage treatment unit. The sewage treatment system provided by the embodiment of the invention is beneficial to improving the sewage treatment efficiency and recycling the adsorbent.

Description

Technical Field

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

[0002] In the semiconductor manufacturing process, there are various pollutants, such as particulate pollutants, metal pollutants, organic pollutants, etc., which will damage the quality of the chip and reduce the efficiency of the chip. In order to obtain the best device performance, long-term reliability and high yield, the wafer cleaning process is particularly important. However, a lot of polluted wastewater is generated in the wafer cleaning process. The wastewater generated by the semiconductor industry has the characteristics of a wide variety of pollutants and is difficult to degrade. Therefore, the efficient treatment technology of polluted wastewater in the semiconductor industry has become a difficulty in the industry.

[0003] Current sewage treatment usually utilizes the adsorption characteristics of adsorbents to remove pollutants from sewage. However, if you want to separate and recycle the used adsorbents from the sewage after treatment, there are problems such as difficulty and time in recycling, which increases the cost of using the adsorbents and is not conducive to cost control and improvement of production efficiency. Summary of the invention

[0004] The technical problem solved by the present invention is to provide a sewage treatment system which can effectively separate and recover the treated adsorbent, thereby being beneficial to reducing production costs and improving production efficiency.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a sewage treatment system, including: at least two sewage treatment units, adjacent sewage treatment units are connected to each other, and the sewage treatment units are used to mix magnetic adsorbent and sewage; an electromagnetic device, the electromagnetic device is arranged on the sewage treatment unit; and a magnetic adsorbent recovery unit, the magnetic adsorbent recovery unit is connected to each of the sewage treatment units.

[0006] Optionally, the sewage treatment unit includes: a reaction tank, a recovery port is provided at the bottom of the reaction tank, and the recovery port is connected to the magnetic adsorbent recovery unit.

[0007] Optionally, the electromagnetic device includes: an electromagnet, which is arranged in the reaction pool and close to the recovery port; and an electromagnetic control device, which is electrically connected to the electromagnet and is used to control the magnetism of the electromagnet.

[0008] Optionally, the electromagnetic control device includes a power supply and an electromagnetic switch, the power supply is used to supply power to the electromagnet, and the electromagnetic switch is used to control the on / off of the power supply and the magnitude of the current.

[0009] Optionally, the sewage treatment unit further comprises a stirring device, wherein the stirring device is disposed in the reaction tank and is used to stir the magnetic adsorbent and the sewage.

[0010] Optionally, the stirring device includes a stirring rod and a driving mechanism, wherein the driving mechanism is electrically connected to the stirring rod, and the driving mechanism is used to drive the stirring rod to rotate.

[0011] Optionally, the reaction pool is further provided with a feeding port, which is arranged at the top of the reaction pool and is used to feed a magnetic adsorbent into the reaction pool.

[0012] Optionally, a liquid inlet and a liquid outlet are further provided on the reaction tank, and between adjacent sewage treatment units, the liquid outlet of the upstream sewage treatment unit is connected to the liquid inlet of the downstream sewage treatment unit.

[0013] Optionally, it also includes: a pipeline switch, which is arranged on the connecting pipeline between adjacent sewage treatment units.

[0014] Optionally, it also includes: a peristaltic pump, which is arranged on the connecting pipe between adjacent sewage treatment units and on the connecting pipe between each sewage treatment unit and the magnetic adsorbent recovery unit.

[0015] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0016] The sewage treatment system provided by the technical solution includes at least two sewage treatment units. On the one hand, the sewage treatment undergoes at least two processes to ensure that the treated sewage meets the qualified standards; on the other hand, by using a magnetic adsorbent to treat the sewage, after the sewage treatment is completed, the magnetic adsorbent is adsorbed by an electromagnetic device, which can achieve the effect of rapid separation of the magnetic adsorbent and sewage, reduce the difficulty and time of recovering the magnetic adsorbent, effectively complete the recovery of the magnetic adsorbent, and help reduce production costs and improve production efficiency.

[0017] Furthermore, the electromagnetic control device includes a power supply and an electromagnetic switch, wherein the power supply is used to supply power to the electromagnet, and the electromagnetic switch is used to control the on and off of the power supply and the magnitude of the current. The electromagnetic control device uses the electromagnetic switch to close the electromagnetic switch when the sewage reacts, the electromagnet is not magnetic, and the magnetic adsorbent adsorbs the pollutants in the sewage; after the sewage treatment is completed, the electromagnetic switch is turned on, the electromagnet is magnetic, and the magnetic adsorbent is separated from the sewage by magnetic force. In addition, the magnitude of the magnetic force can also be controlled according to the amount of magnetic adsorbent to be recovered, so as to better complete the recovery of the magnetic adsorbent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a sewage treatment system in one embodiment of the present invention. DETAILED DESCRIPTION

[0019] As described in the background art, after sewage treatment is completed, the adsorbent that adsorbs pollutants in the sewage needs to be recovered. However, it is currently difficult to separate the adsorbent from the sewage, it takes a long time, and it is easy to cause secondary pollution during the recovery process.

[0020] In order to solve the above problems, an embodiment of the present invention provides a sewage treatment system, which uses a magnetic adsorbent to adsorb pollutants in sewage, and then cooperates with an electromagnetic device. After the reaction is completed, the magnetic adsorbent is attracted by an electromagnetic device with an external magnetic field to separate the magnetic adsorbent from the sewage, and then recovered by a magnetic adsorbent recovery unit. The device has a simple structure, which reduces the difficulty and time of magnetic adsorbent recovery, saves the cost of adsorbent use, and improves production efficiency. In addition, at least two sewage treatment units are set up, and sewage treatment must go through at least two processes, which can ensure that the treated sewage meets the treatment requirements. Through multiple sewage treatment processes, the amount of magnetic adsorbent used in each process and the response time can also be reasonably configured, which is conducive to improving the efficiency of sewage treatment and reducing time costs.

[0021] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] Figure 1 It is a structural schematic diagram of a sewage treatment system in one embodiment of the present invention.

[0023] The sewage treatment system includes: at least two sewage treatment units, which are connected to each other before being adjacent to each other, and the sewage treatment units are used to mix magnetic adsorbent and sewage; an electromagnetic device, which is arranged on the sewage treatment units; and a magnetic adsorbent recovery unit, which is connected to each of the sewage treatment units.

[0024] In the embodiment of the present invention, by setting at least two sewage treatment units, the sewage treatment undergoes at least two processes, which can ensure the effect of sewage treatment and make the treated sewage meet the requirements. In addition, in the sewage treatment system of the embodiment of the present invention, the sewage treatment undergoes multiple processes, and the amount of magnetic adsorbent used in each process can be reasonably configured to maximize the effectiveness of the magnetic adsorbent. In addition, the reaction time of each process can be reasonably allocated to improve the efficiency of sewage treatment.

[0025] In practical applications, the number of sewage treatment units can be determined based on the amount of sewage to be treated and the concentration of pollutants in the sewage. The amount of magnetic adsorbent used in each treatment process and the reaction time can be determined by the concentration of pollutants in the sewage treated in the current process, which is not limited in the embodiments of the present invention.

[0026] In this embodiment, a magnetic adsorbent is used to adsorb pollutants in sewage. After the reaction is completed, the magnetic force generated by the external magnetic field of the electromagnetic device attracts the magnetic adsorbent, separates the magnetic adsorbent from the sewage, and then is recovered by a magnetic adsorbent recovery unit. The device has a simple structure, and the principle of separating and recovering the magnetic adsorbent is simple, which reduces the difficulty and time of recovering the adsorbent and can also avoid secondary pollution caused by the adsorbent, which is conducive to reducing costs and improving production efficiency.

[0027] The magnetic adsorbent may be an adsorbent material having magnetic properties, such as magnetic powder, or may be a material such as activated carbon that has been subjected to magnetic modification.

[0028] refer to Figure 1 In this embodiment, two sewage treatment units are used as an example for description. The sewage treatment system includes a first sewage treatment unit 10 and a second sewage treatment unit 20, and the first sewage treatment unit 10 and the second sewage treatment unit 20 are connected.

[0029] In other embodiments, according to different pollution indicators of the sewage to be treated, several more sewage treatment units may be designed to treat the sewage multiple times to ensure that the sewage meets the discharge requirements after treatment.

[0030] In practical applications, if the sewage discharge volume is large and the pollutant concentration is high, in the primary reaction, after the adsorbent reaches adsorption saturation, it cannot effectively remove pollutants in the sewage. By setting up a secondary sewage treatment unit or even more sewage treatment units, the effluent in the primary sewage treatment unit can be subjected to secondary adsorption treatment. The process flow is simple, which can effectively shorten the reaction time and improve the sewage treatment efficiency.

[0031] Each of the sewage treatment units includes a reaction tank, which is used to mix the magnetic adsorbent and the sewage to be treated. The reaction tank is provided with a liquid inlet and a liquid outlet, and the sewage to be treated flows into the reaction tank through the liquid inlet, and the sewage after the reaction is completed flows out of the reaction tank through the liquid outlet; the reaction tank is also provided with a feeding port, which is provided at the top of the reaction tank, and is used to feed the magnetic adsorbent into the reaction tank.

[0032] In this embodiment, the liquid inlet and the liquid outlet are arranged on the side wall of the reaction tank.

[0033] In this embodiment, the reaction tanks between two adjacent sewage treatment units are connected, and the liquid outlet of the upstream reaction tank is connected to the liquid inlet of the downstream reaction tank. After the sewage is treated at the previous level, it enters the next-level reaction tank for further treatment. Through multiple sewage treatments, it is ensured that the standard requirements for sewage treatment are met.

[0034] Specifically, the reaction pool is also provided with a recovery port, and the recovery port of each reaction pool is connected to the magnetic adsorbent recovery unit. The recovery port is arranged at the bottom of the reaction pool. After the reaction is completed, the used magnetic adsorbent enters the magnetic adsorbent recovery unit through the recovery port. The recovery port is arranged at the bottom of the reaction pool, which is conducive to the recovery of the magnetic adsorbent.

[0035] Continue to refer Figure 1 In this embodiment, the first sewage treatment unit 10 includes a first reaction tank 101, on which a first liquid inlet 102, a first liquid outlet 103, a first feeding port 104 and a first recovery port 105 are provided; the second sewage treatment unit 20 includes a second reaction tank 201, on which a second liquid inlet 202, a second liquid outlet 203, a second feeding port 204 and a second recovery port 205 are provided, and the first liquid outlet 103 of the first reaction tank 101 is connected to the second liquid inlet 202 of the second reaction tank 201.

[0036] In this embodiment, sewage enters the first reaction tank 101 from the first liquid inlet 102, and the magnetic adsorbent is added into the first reaction tank 101 from the first feeding port 104. The sewage is treated for the first time in the first reaction tank 101. After the first treatment is completed, the sewage is transported from the first reaction tank 101 to the second reaction tank 201 through the first liquid outlet 103 and the second liquid inlet 202, and the magnetic adsorbent is added into the second reaction tank 201 from the second feeding port 204. The sewage is treated for the second time in the second reaction tank 201.

[0037] In this embodiment, the number of the magnetic adsorbent recovery unit 100 is one, and the first recovery port 105 and the second recovery port 205 are connected to the same magnetic adsorbent recovery unit 100.

[0038] In other embodiments, each recovery port may correspond to a magnetic adsorbent recovery unit.

[0039] Each of the sewage treatment units further includes a stirring device. In this embodiment, the stirring device includes a first stirring device and a second stirring device. The first stirring device is disposed in the first reaction tank 101, and the second stirring device is disposed in the second reaction tank 201. The stirring device is used to stir the magnetic adsorbent and the sewage, and the magnetic adsorbent and the sewage can be fully mixed to achieve the best adsorption effect of the magnetic adsorbent.

[0040] In this embodiment, the first stirring device includes a first stirring rod 106 and a first driving mechanism (not shown in the figure), the first stirring rod 106 is arranged in the first reaction pool 101, the first driving mechanism is electrically connected to the first stirring rod 106, and the first driving mechanism is used to drive the first stirring rod 106 to rotate; the second stirring device includes a second stirring rod 206 and a second driving mechanism (not shown in the figure), the second stirring rod 206 is arranged in the second reaction pool 201, the second driving mechanism is electrically connected to the second stirring rod 206, and the second driving mechanism is used to drive the second stirring rod 206 to rotate.

[0041] In this embodiment, the first stirring rod 106 and the second stirring rod 206 are controlled and driven by the first driving mechanism and the second driving mechanism respectively. The rotation speeds of the first stirring rod 106 and the second stirring rod 206 can be adjusted according to different processes, making sewage treatment more flexible.

[0042] In other embodiments, the stirring rod in each reaction pool may also be controlled by a driving mechanism.

[0043] Each of the sewage treatment units is provided with an electromagnetic device, which can control the magnetic adsorbent in each sewage treatment unit separately, and has the best attraction effect on the magnetic adsorbent. The recovery of the magnetic adsorbent between the sewage treatment units does not interfere with each other, and the operation is independent, which can improve the efficiency of sewage treatment and magnetic adsorbent recovery.

[0044] The electromagnetic device comprises an electromagnet and an electromagnetic control device. The electromagnet is installed in the reaction pool and is close to the recovery port. The electromagnetic control device is electrically connected to the electromagnet and is used to control the magnetism of the electromagnet.

[0045] In this embodiment, the electromagnet is a hollow annular magnet, and the outer magnetic force of the electromagnet is greater than the inner magnetic force.

[0046] In this embodiment, the electromagnet core and the coil surrounding the core generate magnetism when the coil is energized, and the core does not have magnetism when the coil is not energized.

[0047] The magnetic core is usually an iron core.

[0048] In this embodiment, the electromagnetic control device includes a power supply and an electromagnetic switch. The power supply is powered on or off under the control of the electromagnetic switch, and the electromagnetic switch can also control the magnitude of the power supply current, thereby controlling the magnitude of the magnetic force generated by the electromagnet by controlling the current magnitude.

[0049] In specific applications, in the initial state, the electromagnetic switch is closed, the power supply is not supplied, the electromagnet has no magnetic force, and the magnetic adsorbent in the reaction tank adsorbs the pollutants in the sewage; after the reaction is completed, the electromagnetic switch is turned on, the power supply is supplied, the coil of the electromagnet is energized to generate a magnetic field, the electromagnet is magnetic, and the magnetic adsorbent in the reaction tank is attracted to the electromagnet, and then the sewage is discharged from the reaction tank to achieve solid-liquid separation of the magnetic adsorbent and the sewage; finally, after the sewage is discharged, the power is cut off again, the electromagnet loses its magnetism, and the magnetic adsorbent falls from the electromagnet to the recovery port, and enters the magnetic adsorbent recovery unit through the recovery port to achieve the recovery of the magnetic adsorbent.

[0050] In this embodiment, the magnitude of the current from the power supply to the coil can be determined according to the amount of magnetic adsorbent used in the reaction pool, thereby determining the strength of the magnetism generated by the electromagnet, avoiding energy waste due to too strong magnetism, or the inability to fully attract the magnetic adsorbent in the reaction pool due to too weak magnetism.

[0051] Continue to refer Figure 1 In this embodiment, the electromagnetic device includes a first electromagnetic device 30 and a second electromagnetic device 40 , the first electromagnetic device 30 is disposed on the first sewage treatment unit 10 , and the second electromagnetic device 40 is disposed on the second sewage treatment unit 20 .

[0052] In this embodiment, the first electromagnetic device 30 includes a first electromagnet 31 and a first electromagnetic control device 32, and the first electromagnet 31 is installed in the first reaction pool 101 and close to the first recovery port 105; the second electromagnetic device 40 includes a second electromagnet 41 and a second electromagnetic control device 42, and the second electromagnet 41 is installed in the second reaction pool 201 and close to the second recovery port 205.

[0053] Continue to refer Figure 1 The sewage treatment system further includes: a pipeline switch 50, and the pipeline switch 50 is arranged on the connecting pipeline between adjacent sewage treatment units.

[0054] In this embodiment, the pipeline switch 50 is arranged on the connecting pipeline between the first liquid outlet 103 and the second liquid inlet 202, and the pipeline switch 50 is used to control the on-off of the connecting pipeline. When the first sewage treatment unit 10 is in working state, the pipeline switch 50 is closed, and the sewage cannot enter the second sewage treatment unit 20 through the connecting pipeline between the first liquid outlet 103 and the second liquid inlet 202; when the first sewage treatment unit 10 finishes the reaction, the pipeline switch 50 is opened again to discharge the sewage from the first sewage treatment unit 10 to the second sewage treatment unit 20. After the sewage completely enters the second sewage treatment unit 20, the pipeline switch 50 is closed again, and the sewage undergoes secondary reaction in the second sewage treatment unit 20.

[0055] Continue to refer Figure 1 The sewage treatment system further includes: a peristaltic pump 60, which is arranged on the connecting pipes between adjacent sewage treatment units and on the connecting pipes between each sewage treatment unit and the magnetic adsorbent recovery unit.

[0056] In this embodiment, the peristaltic pump 60 is arranged on the connecting pipe between the first liquid outlet 103 and the second liquid inlet 202, on the connecting pipe between the first recovery port 105 and the magnetic adsorbent recovery unit 100, and on the connecting pipe between the second recovery port 205 and the magnetic adsorbent recovery unit 100.

[0057] In this embodiment, the peristaltic pump 60 provides power for the transportation of sewage and the transportation of magnetic adsorbent.

[0058] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A sewage treatment system, characterized in that: include: At least two sewage treatment units, adjacent to each other, and used for mixing the magnetic adsorbent and sewage; An electromagnetic device, wherein the electromagnetic device is arranged on the sewage treatment unit; A magnetic adsorbent recovery unit is connected to each of the sewage treatment units.

2. The sewage treatment system according to claim 1, characterized in that: The sewage treatment unit comprises: a reaction tank, a recovery port is arranged at the bottom of the reaction tank, and the recovery port is connected to the magnetic adsorbent recovery unit.

3. The sewage treatment system according to claim 2, characterized in that: The electromagnetic device comprises: an electromagnet, which is arranged in the reaction pool and close to the recovery port; and an electromagnetic control device, which is electrically connected to the electromagnet and is used to control the magnetism of the electromagnet.

4. The sewage treatment system according to claim 3, characterized in that: The electromagnetic control device comprises a power supply and an electromagnetic switch. The power supply is used to supply power to the electromagnet, and the electromagnetic switch is used to control the on / off of the power supply and the magnitude of the current.

5. The sewage treatment system according to claim 2, characterized in that: The sewage treatment unit further comprises a stirring device, which is arranged in the reaction tank and is used to stir the magnetic adsorbent and the sewage.

6. The sewage treatment system according to claim 5, characterized in that: The stirring device comprises a stirring rod and a driving mechanism, wherein the driving mechanism is electrically connected to the stirring rod and is used to drive the stirring rod to rotate.

7. The sewage treatment system according to claim 2, characterized in that: The reaction pool is also provided with a feeding port, which is arranged at the top of the reaction pool and is used for feeding a magnetic adsorbent into the reaction pool.

8. The sewage treatment system according to claim 2, characterized in that: The reaction tank is also provided with a liquid inlet and a liquid outlet. Between adjacent sewage treatment units, the liquid outlet of the upstream sewage treatment unit is connected to the liquid inlet of the downstream sewage treatment unit.

9. The sewage treatment system according to claim 1, characterized in that: Also includes: A pipeline switch is arranged on the connecting pipeline between adjacent sewage treatment units.

10. The sewage treatment system according to claim 1, characterized in that: Also includes: A peristaltic pump is arranged on the connecting pipes between adjacent sewage treatment units and on the connecting pipes between each sewage treatment unit and the magnetic adsorbent recovery unit.

Images