Magnetic coagulation integrated water treatment system and treatment process thereof

Abstract

The invention discloses a magnetic coagulation integrated water treatment system and a treatment process thereof. The sewage treatment device comprises a sewage inlet end, a coagulation aid tank is arranged on the side face of the sewage inlet end, the lower end of the coagulation aid tank is communicated with a loading tank, the lower end of the loading tank is communicated with a flocculation tank, the lower end of the flocculation tank is communicated with a sedimentation tank, a magnetic powder lifting pump is fixedly installed at the bottom of the sedimentation tank, and the magnetic powder lifting pump is upwards communicated with a magnetic separation system. And the magnetic separation system is downwards communicated with a sludge temporary storage tank. The coagulation aid tank, the loading tank, the flocculation tank, the sedimentation tank, the magnetic powder lifting pump and the magnetic separation system can be directly integrated together, installation and use are convenient, in the aspect of rural sewage treatment, the integration of the system is improved, the occupied area can be greatly reduced, and the overall investment cost is reduced. The coagulation aid tank, the loading tank and the flocculation tank are connected into a whole through the communication ports, so that the stirring efficiency is high, the stirring time can be greatly shortened, and the treatment efficiency of the system is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment devices, and specifically relates to a magnetic coagulation integrated water treatment system and a treatment process thereof. Background Art

[0002] Magnetic coagulation technology is a water treatment method that uses magnetic particles to adsorb, flocculate and settle pollutants in water. As early as the 1950s, the magnetic solid phase method was used for water treatment. With the continuous development of modern science and technology, magnetic coagulation technology has also been continuously innovated and improved. At present, magnetic coagulation technology has become an efficient and environmentally friendly water treatment method, widely used in flood control, land transformation, rural sewage treatment and other fields. The existing magnetic coagulation equipment has large investment, complex integration, poor efficiency, poor magnetic seed recycling effect, and lack of integrated treatment process methods for village and town sewage treatment. Therefore, in order to solve the above problems, a magnetic coagulation integrated water treatment system and its treatment process are proposed. Summary of the invention

[0003] The purpose of the present invention is to propose a magnetic coagulation integrated water treatment system and a treatment process thereof in order to solve the above-mentioned problems.

[0004] The technical solution adopted by the present invention is as follows: a magnetic coagulation integrated water treatment system and its treatment process, including a sewage inlet end, a coagulation aid tank is arranged on the side of the sewage inlet end, the lower end of the coagulation aid tank is connected to a loading tank, the lower end of the loading tank is connected to a flocculation tank, the lower end of the flocculation tank is connected to a sedimentation tank, and a magnetic powder lifting pump is fixedly installed at the bottom of the sedimentation tank, the magnetic powder lifting pump is connected to a magnetic separation system upward, and the magnetic separation system is connected to a sludge temporary storage tank downward.

[0005] In a preferred embodiment, an inclined pipe, a water collecting weir (9) and a mud collecting trough are arranged in the sedimentation tank. The sedimentation tank is a trough structure, and an inclined pipe is connected upward in the trough body of the sedimentation tank. One side of the trough body of the sedimentation tank is connected to a water collecting weir with a V-shaped trough structure, and a mud collecting trough with a concave structure is provided at the bottom of the sedimentation tank.

[0006] In a preferred embodiment, the inclined tubes are evenly distributed tubular structures.

[0007] In a preferred embodiment, the magnetic coagulation integrated water treatment system and its treatment process, the present invention also relates to a magnetic coagulation integrated water treatment process, the process specifically comprises the following steps:

[0008] Step 1: coagulation-aided stirring: the sewage is transported from the sewage inlet to the coagulation-aided tank, coagulant-aided chemicals are added into the coagulation-aided tank, and then stirred.

[0009] Step 2: loading and stirring. The stirred sewage is put into the loading tank, magnetic powder is added to the coagulated sewage in the loading tank, and then stirred.

[0010] Step three, flocculation and stirring. Put the sewage after adding magnetic powder into the flocculation tank again. After adding PAM agent in the flocculation tank, continue to stir. Magnetic powder and flocculant have good adsorption effect on bacteria, viruses, oil and various tiny particles.

[0011] Step 4: sedimentation. The sewage after stirring is transported to the sedimentation tank through a pipeline. The magnetic sewage is reacted into large flocs in the flocculation tank. The magnetic powder has a large specific gravity in the sedimentation tank, which increases the density of the coagulated flocs and accelerates the sedimentation speed of the coagulated flocs in the sedimentation tank. The magnetic coagulated flocs can be efficiently precipitated at the bottom of the tank.

[0012] Step five, magnetic mud separation, the sludge at the bottom of the sedimentation tank is transported to the magnetic separation system through the magnetic powder lifting pump. The sludge in the magnetic separation system uses the high-speed rotation of the shearing blade to produce a strong mechanical shearing effect on the magnetic flocs, the magnetic flocs are broken up, and the magnetic powder and sludge are deflocculated and separated. Then the mixture of magnetic powder and sludge passes under the magnetic drum. The magnetic powder is adsorbed on the surface of the magnetic drum under the action of strong magnetic force and collected by the scraper. After being stirred in the loading tank, the magnetic powder is returned to the flocculation tank for recycling. The non-magnetic sludge enters the sludge temporary storage tank under the action of gravity and is discharged out of the system.

[0013] Step six, magnetic powder reuse: after the magnetic powder and sludge are separated in the magnetic separation system, the magnetic powder is put into the loading tank for reuse, and the separated sludge is transported into the sludge temporary storage tank.

[0014] Step seven, clear liquid reuse and sludge disposal, the top supernatant in the sludge temporary storage tank is returned to the loading tank for reuse, and the sludge at the bottom is sent to the subsequent sludge dewatering system for further treatment.

[0015] In a preferred embodiment, the coagulant added to the coagulant tank is polyaluminum chloride, the coagulant is configured at a mass concentration of 5% to 10%, the dosage of the coagulant should generally be in the range of 10 mg to 60 mg / L, and the reaction time of the sewage in the coagulant tank is 1.5-2 minutes.

[0016] In a preferred embodiment, magnetic powder is added into the loading tank, and the sewage needs to be fully stirred and mixed in the loading tank for 1.5 min-2 min.

[0017] In a preferred embodiment, a flocculating agent needs to be added to the flocculation tank. The flocculating agent is polyacrylamide anion PAM. The configuration of the flocculating agent should be based on the water quality. It is configured at a weight concentration of 0.1% to 0.2% and can be completely dissolved for use one hour after the configuration is completed. The dosage of the flocculating agent should be determined after testing the water quality indicators. Generally, the dosage of the drug prepared according to the above ratio should be in the range of 1 mg to 3 mg / L, and the stirring time of the sewage in the flocculation tank is 1.5 min to 2 min.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. In the present invention, the coagulant tank, loading tank, flocculation tank, sedimentation tank, magnetic powder lift pump and magnetic separation system can be directly integrated together, which is convenient for installation and use. In terms of village and town sewage treatment, the system integration is improved, the floor space occupied can be greatly reduced, and the overall investment cost is reduced.

[0020] 2. In the present invention, the coagulation aid tank, loading tank and flocculation tank are connected as one by setting a connecting port, which has high stirring efficiency, can greatly shorten the stirring time and improve the processing efficiency of the system.

[0021] 3. In the present invention, the sludge settled in the sedimentation tank is lifted into the magnetic separation system by the magnetic powder lifting pump. After separation, the sludge is sent to the sludge temporary storage tank through the pipeline for transportation or treatment, while the magnetic seeds are continuously put into the system for continued use, thereby improving the recovery efficiency of the magnetic seeds and reducing the use efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the process route diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the coagulation reaction system principle of the present invention;

[0024] Figure 3 It is a schematic diagram of the sedimentation tank structure of the present invention.

[0025] Markings in the figure: 1-coagulation tank; 2-loading tank; 3-flocculation tank; 4-sedimentation tank; 5-magnetic powder lifting pump; 6-magnetic separation system; 7-sludge temporary storage tank; 8-inclined pipe; 9-water collection weir; 10-sludge collecting tank. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The following will be combined Figure 1-Figure 3 A magnetic coagulation integrated water treatment system and its treatment process according to an embodiment of the present invention are described in detail.

[0028] Example:

[0029] The embodiment of the present invention provides a magnetic coagulation integrated water treatment system and its treatment process, comprising a sewage inlet end, a coagulation aid tank 1 is arranged on the side of the sewage inlet end, the lower end of the coagulation aid tank (1) is connected to a loading tank 2, the lower end of the loading tank 2 is connected to a flocculation tank 3, the lower end of the flocculation tank 3 is connected to a sedimentation tank 4, and a magnetic powder lifting pump 5 is fixedly installed at the bottom of the sedimentation tank 4, the magnetic powder lifting pump 5 is connected to a magnetic separation system 6 upward, and the magnetic separation system 6 is connected to a sludge temporary storage tank 7 downward.

[0030] The sedimentation tank 4 is provided with an inclined pipe 8, a water collecting weir 9 and a mud collecting trough 10. The sedimentation tank 4 is a trough structure, and the inclined pipe 8 is connected upwardly in the trough of the sedimentation tank 4. One side of the trough of the sedimentation tank 4 is connected with a water collecting weir 9 of a V-shaped trough structure, and a mud collecting trough 10 of a concave structure is provided at the bottom of the sedimentation tank 4. The inclined pipes 8 are evenly arranged tubular structures.

[0031] The present invention also relates to a magnetic coagulation integrated water treatment process, which specifically comprises the following steps:

[0032] Step 1, coagulation and stirring, the sewage is transported from the sewage inlet end to the coagulation tank 1, a coagulant is added to the coagulation tank 1, and then stirred. The coagulant added to the coagulation tank 1 is polyaluminium chloride, the coagulant is configured at a mass concentration of 5% to 10%, the dosage of the coagulant should generally be in the range of 10mg to 60mg / L, the reaction time of the sewage in the coagulation tank 1 is 1.5-2 minutes, the coagulant can use its surface adsorption to increase the density of the floccules, which is beneficial to the subsequent generation of floccules, and at the same time reduces the dosage of the flocculant in the subsequent steps.

[0033] Step 2: Loading and stirring. The stirred sewage enters the loading tank 2, and magnetic powder is added to the sewage after coagulation in the loading tank 2, and then stirred. Magnetic powder is added to the loading tank 2, and the sewage needs to be fully stirred and mixed in the loading tank 2 for 1.5min-2min. The magnetic seeds can combine with the coagulated flocs. Since the magnetic seeds have a large specific gravity, the density of the coagulated flocs is increased, which plays an important role in the precipitation in the subsequent steps, and can accelerate the precipitation speed of the coagulated flocs in the sedimentation tank. At the same time, the surface of the magnetic seeds has physical adsorption and charge adsorption, which can further remove pollutants in the water body and improve the treatment quality of sewage.

[0034] Step 3, flocculation and stirring, the sewage after adding magnetic powder and stirring is put into the flocculation tank 3 again, and after adding PAM agent in the flocculation tank 3, stirring is continued. The magnetic powder and flocculant have good adsorption effect on bacteria, viruses, oil and various tiny particles. The flocculation agent needs to be added to the flocculation tank 3. The flocculation agent is polyacrylamide anion PAM. The configuration of the flocculation agent should be specifically configured according to the water quality. It is configured according to the weight concentration of 0.1% to 0.2% and can be completely dissolved for use after 1 hour after the configuration is completed. The dosage of the flocculation agent should be determined after the water quality index test. Under normal circumstances, the dosage of the drug prepared according to the above ratio should be within the range of 1mg to 3mg / L. The stirring time of the sewage in the flocculation tank 3 is 1.5min-2min. The flocculant can absorb the suspended matter in the water, so that it gradually forms larger agglomerates, thereby reducing the turbidity of the water body. In addition, the flocculant can also stabilize the suspended particle aggregates, prevent them from dispersing back into the water body, and enhance the stability of the agglomerates.

[0035] Step 4, sedimentation, the sewage after stirring is transported to the sedimentation tank 4 through the pipeline. The magnetic sewage reacted into large flocs in the flocculation tank 3 is in the sedimentation tank 4. The magnetic powder has a large specific gravity, which increases the density of the coagulated flocs and accelerates the sedimentation speed of the coagulated flocs in the sedimentation tank 4. The magnetic coagulated flocs can be efficiently precipitated at the bottom of the tank.

[0036] Step five, magnetic mud separation, the sludge at the bottom of the sedimentation tank 4 is transported to the magnetic separation system 6 through the magnetic powder lifting pump 5. The sludge in the magnetic separation system 6 uses the high-speed rotation of the shearing head to produce a strong mechanical shearing effect on the magnetic flocs, the magnetic flocs are broken up, and the magnetic powder and sludge are deflocculated and separated. Then the mixture of magnetic powder and sludge passes under the magnetic drum. The magnetic powder is adsorbed on the surface of the magnetic drum under the action of strong magnetic force and collected by the scraper. After being stirred in the loading tank 2, the magnetic powder is returned to the flocculation tank 3 for recycling. The non-magnetic sludge enters the sludge temporary storage tank 7 under the action of gravity and is discharged out of the system.

[0037] Step six, magnetic powder recycling, after the sludge is separated from the magnetic powder in the magnetic separation system 6, the magnetic powder enters the loading tank 2 for recycling, and the separated sludge is transported into the sludge temporary storage tank 7.

[0038] Step seven, clear liquid recycling and sludge disposal, the top supernatant in the sludge temporary storage tank 7 is returned to the loading tank 2 for recycling, and the sludge at the bottom is sent to the subsequent sludge dewatering system for further treatment.

[0039] Working principle: In the present invention, the coagulant tank, loading tank, flocculation tank, sedimentation tank, magnetic powder lift pump and magnetic separation system can be directly integrated together, which is convenient for installation and use. In terms of village and town sewage treatment, the system integration is improved, the floor space occupied can be greatly reduced, and the overall investment cost is reduced. In the present invention, the coagulant tank, loading tank and flocculation tank are connected as one by setting a connecting port, and the stirring efficiency is high, which can greatly shorten the stirring time and improve the treatment efficiency of the system.

[0040] In the present invention, the sludge settled in the sedimentation tank is lifted into the magnetic separation system by a magnetic powder lifting pump. After separation, the sludge is sent to the sludge temporary storage tank through a pipeline for transportation or treatment, while the magnetic seeds are continuously put into the system for continued use, thereby improving the recovery and utilization efficiency of the magnetic seeds and reducing the utilization efficiency of the system.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic coagulation integrated water treatment system and its treatment process, characterized in that: The invention comprises a sewage inlet end, a coagulation aid tank (1) is arranged on the side of the sewage inlet end, the lower end of the coagulation aid tank (1) is connected to a loading tank (2), the lower end of the loading tank (2) is connected to a flocculation tank (3), the lower end of the flocculation tank (3) is connected to a sedimentation tank (4), and a magnetic powder lifting pump (5) is fixedly installed at the bottom of the sedimentation tank (4), the magnetic powder lifting pump (5) is connected to a magnetic separation system (6) upwards, and the magnetic separation system (6) is connected to a sludge temporary storage tank (7) downwards.

2. The magnetic coagulation integrated water treatment system and treatment process according to claim 1, characterized in that: The sedimentation tank (4) is provided with an inclined pipe (8), a water collecting weir (9) and a mud collecting trough (10); the sedimentation tank (4) is a trough structure, and the inclined pipe (8) is connected upwardly in the trough body of the sedimentation tank (4); one side of the trough body of the sedimentation tank (4) is connected with a water collecting weir (9) with a V-shaped trough structure, and a mud collecting trough (10) with a concave structure is provided at the bottom of the sedimentation tank (4).

3. The magnetic coagulation integrated water treatment system and treatment process according to claim 2, characterized in that: The inclined tubes (8) are tubular structures that are evenly distributed.

4. According to the magnetic coagulation integrated water treatment system and treatment process thereof according to claim 3, the present invention also relates to a magnetic coagulation integrated water treatment process, characterized in that: The process specifically includes the following steps: Step 1: coagulation-aiding stirring, transporting the sewage from the sewage inlet end to the coagulation-aiding tank (1), adding a coagulation-aiding agent into the coagulation-aiding tank (1), and then stirring; Step 2: loading and stirring, the stirred sewage is put into the loading tank (2), magnetic powder is added to the sewage after coagulation in the loading tank (2), and then stirred; Step 3: flocculation and stirring. The sewage after adding magnetic powder and stirring is put into the flocculation tank (3). After adding PAM agent in the flocculation tank (3), stirring is continued. Step 4, sedimentation, the sewage after stirring is transported to the sedimentation tank (4) through a pipeline, the magnetic sewage reacted in the flocculation tank (3) to form large flocs in the sedimentation tank (4), the magnetic powder has a large specific gravity, thereby increasing the density of the coagulated flocs, accelerating the sedimentation speed of the coagulated flocs in the sedimentation tank (4), and the magnetic coagulated flocs can be efficiently precipitated at the bottom of the tank; Step 5, magnetic sludge separation, the sludge at the bottom of the sedimentation tank (4) is transported to the magnetic separation system (6) through the magnetic powder lifting pump (5), the sludge is rotated at high speed by the shearing blade in the magnetic separation system (6), and a strong mechanical shearing effect is generated on the magnetic flocs, the magnetic flocs are broken up, and the magnetic powder and sludge are deflocculated and separated, and then the mixture of magnetic powder and sludge passes under the magnetic drum, the magnetic powder is adsorbed on the surface of the magnetic drum under the action of strong magnetic force, and is collected by the scraper, and the magnetic powder is stirred in the loading tank (2) and returned to the flocculation tank (3) for recycling, and the non-magnetic sludge enters the sludge temporary storage tank (7) under the action of gravity and is discharged out of the system; Step 6, recycling the magnetic powder. After the magnetic powder and the sludge are separated in the magnetic separation system (6), the magnetic powder is put into the loading tank (2) for recycling, and the separated sludge is transported into the sludge temporary storage tank (7); Step seven, clear liquid recycling and sludge disposal, the top supernatant in the sludge temporary storage tank (7) is returned to the loading tank (2) for recycling, and the sludge at the bottom is sent to the subsequent sludge dewatering system for further treatment.

5. The magnetic coagulation integrated water treatment system and its treatment process according to claim 4, characterized in that: The coagulant added to the coagulant tank (1) is polyaluminium chloride, and the coagulant is configured at a mass concentration of 5% to 10%. The dosage of the coagulant is generally within the range of 10mg to 60mg / L. The reaction time of the sewage in the coagulant tank (1) is 1.5-2 minutes.

6. The magnetic coagulation integrated water treatment system and its treatment process according to claim 5, characterized in that: Magnetic powder is added into the loading tank (2), and the sewage is fully stirred and mixed in the loading tank (2) for 1.5 minutes to 2 minutes.

7. The magnetic coagulation integrated water treatment system and its treatment process according to claim 6, characterized in that: A flocculating agent needs to be added to the flocculation tank (3). The flocculating agent is polyacrylamide anion (PAM). The configuration of the flocculating agent should be made according to the water quality. It should be configured at a weight concentration of 0.1% to 0.2% and it will take 1 hour for it to be completely dissolved for use. The dosage of the flocculating agent should be determined after testing the water quality index. Generally, the dosage of the agent prepared according to the above ratio should be in the range of 1 mg to 3 mg / L. The stirring time of the sewage in the flocculation tank (3) is 1.5 min to 2 min.

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