A regeneration cycle system, a sewage treatment system, a method and a process

Abstract

The present application relates to a kind of regeneration circulating system, sewage treatment system and method, including controller, regeneration reaction device, including at least two reaction cavities, each reaction cavity is respectively configured with the discharge mechanism communicated with it, controller is respectively electrically connected with each discharge mechanism, for controlling each discharge mechanism sequentially, circulating discharge after reaction in each reaction cavity Material, feeding device, including main conveying channel and discharge port, discharge port is communicated with main conveying channel, for cooperation each reaction cavity, regenerant dosing device, with each reaction cavity cooperation, And action mechanism, action mechanism, discharge mechanism and regenerant dosing device are respectively electrically connected with controller, and controller is realized sequentially, circulating communication of discharge port and each reaction cavity, regenerant dosing device and each reaction cavity by action mechanism and regenerant dosing device;The present system, not only can continuous operation, but also can high-efficiency reduction and regeneration magnetic adsorbent, significantly improve the recovery efficiency of magnetic adsorbent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic adsorbent, and particularly relates to a regeneration and circulation system of a magnetic adsorbent, a sewage treatment system, a method and a process. BACKGROUND

[0002] The magnetic separation technology is a physical separation method for separating substances with different magnetism by means of magnetic force. The magnetic separation process (magnetic separation sewage treatment process) represented by the super-magnetic separation technology and the magnetic precipitation technology adopts the magnetic loading flocculation technology. The process is significantly improved in flocculation effect due to the addition of magnetic medium (or magnetic seed). The existing technology shows that the magnetic loading flocculation technology can directly remove the pollutants such as suspended solids, TP non-dissolved COD and heavy metals in the water body. However, the pollutants such as ammonia nitrogen, TN and dissolved COD in the water body cannot be directly removed by the magnetic loading flocculation technology. In the existing technology, in order to remove the dissolved indicators in the wastewater, a biochemical process is usually configured downstream of the magnetic separation process, so that in the actual operation process, the magnetic separation process is mainly used to remove the pollutants such as suspended solids, TP non-dissolved COD and heavy metals in the water body, and the biochemical process configured downstream of the magnetic separation process is mainly used to remove the dissolved indicators in the water body and has a certain effect, so that the magnetic separation process and the biochemical process can be used together, but the overall process flow is more complex, the cost is relatively higher, and some disadvantages of the biochemical process itself cannot be avoided, such as the biochemical process is usually greatly affected by the environmental temperature, the microbial culture period is long, and the effluent indicators are difficult to control.

[0003] Based on this, a sewage treatment system based on magnetic adsorbent is designed, specifically, a magnetic adsorbent with adsorption function is used as the magnetic medium, such as a magnetic adsorbent that can adsorb ammonia nitrogen is used as the magnetic medium (for example, including a porous carrier with a chemical formula of Na2Al2Si2O8·nH2O and SmCo5 particles and Fe3O4 particles existing in the pores of the porous carrier, wherein n≥0), a magnetic adsorbent that can adsorb soluble COD is used as the magnetic medium (for example, Fe3O4@chitin N-deacetylation), and the like. Such a sewage treatment system can not only directly remove pollutants such as suspended solids, TP, non-dissolved COD, and heavy metals in the water body, but also effectively adsorb soluble indicators in wastewater, such as ammonia nitrogen, soluble COD, and the like, so that a biochemical process does not need to be configured to remove soluble indicators in the water body. In the actual operation process of the system, the soluble indicators in the wastewater are first adsorbed by the magnetic medium, and then the non-dissolved indicators in the wastewater are formed into magnetic flocculation together with the magnetic medium, and finally the magnetic flocculation can be separated from the water under the action of the magnetic force and form magnetic sludge to achieve the purpose of purifying the sewage. In order to improve the economy of the sewage treatment system, the magnetic medium needs to be recovered from the magnetic sludge for recycling. Since the system uses a magnetic adsorbent with adsorption function as the magnetic medium, the magnetic sludge usually includes the magnetic medium after adsorbing the soluble indicators, the magnetic medium without adsorbing the soluble indicators, and sludge, and the composition is complex. If the magnetic medium in the magnetic sludge is to be recycled, the magnetic medium after adsorbing the soluble indicators needs to be reduced and regenerated to obtain the magnetic medium with adsorption function again. Since the reduction and regeneration reaction of the magnetic medium requires a certain time, and the existing sewage treatment system is usually in a continuous operation state, however, the existing regeneration system used in cooperation with the sewage treatment system can only reduce and regenerate the magnetic medium intermittently, which not only affects the normal continuous operation of the sewage treatment system, but also has low regeneration efficiency of the magnetic medium, which is not conducive to industrial application.

[0004] Therefore, a regeneration system that can reduce and regenerate the magnetic adsorbent and can be used in cooperation with the sewage treatment system and can be continuously and uninterruptedly operated is needed. SUMMARY

[0005] The first aspect of the present application is to solve the problem that the existing technology lacks a regeneration system that can continuously reduce and regenerate the magnetic adsorbent in the sewage treatment process using the magnetic adsorbent as the magnetic medium, which affects the normal continuous operation of the sewage treatment system and has low regeneration and recovery efficiency of the magnetic medium. A regeneration and recycling system that can solve the technical problem is provided, and the main idea is as follows:

[0006] A regeneration and recycling system includes a controller for control,

[0007] The regenerative reaction device comprises at least two reaction cavities for providing regenerative reaction sites, each reaction cavity is provided with a discharge mechanism connected therewith, and a controller is electrically connected with each discharge mechanism for controlling the discharge mechanism to discharge the reacted substances in each reaction cavity in sequence and circulation,

[0008] The feeding device comprises a main conveying channel and at least one discharge port connected with the main conveying channel for cooperating with each reaction cavity, the main conveying channel is used for receiving the magnetic substances conveyed from the upstream, and the magnetic substances are input into each reaction cavity through the discharge port,

[0009] The regenerative agent adding device cooperates with each reaction cavity, and

[0010] The action mechanism, the discharge mechanism and the regenerative agent adding device are electrically connected with the controller, the controller controls the discharge port to be sequentially and circularly communicated with each reaction cavity through the action mechanism, controls the regenerative agent adding device to sequentially and circularly add the regenerative agent adapted to the magnetic medium into each reaction cavity, and controls the discharge mechanism to sequentially and circularly discharge the reacted substances in each reaction cavity. In the scheme, at least two reaction cavities are arranged in the regenerative reaction device to solve the problem of providing reaction sites. The feeding device is arranged, and the discharge port cooperates with the reaction cavity to solve the problem of receiving and conveying the upstream magnetic substances. The regenerative agent adding device is arranged, and the regenerative agent adding device cooperates with the reaction cavity to solve the problem of adding the regenerative agent into the reaction cavity. The action mechanism is arranged, and the action mechanism is electrically connected with the controller, so that the controller can control the discharge port to be sequentially and circularly communicated with each reaction cavity through the action mechanism, thereby solving the problem of continuously and uninterruptedly receiving the upstream magnetic substances. The regenerative agent adding device is arranged, and the regenerative agent adding device is electrically connected with the controller, so that the controller can control the regenerative agent adding device to sequentially and circularly add the regenerative agent adapted to the magnetic medium into each reaction cavity, thereby solving the problem of continuously and quantitatively adding the regenerative agent. The discharge mechanism is arranged for each reaction cavity, and the discharge mechanism is electrically connected with the controller, so that the controller can control the discharge mechanism to sequentially and circularly discharge the reacted substances in each reaction cavity, thereby solving the problem of continuous discharge. That is to say, in the system, the action mechanism, the discharge mechanism and the regenerative agent adding device are cooperatively operated under the coordinated control of the controller to achieve the purpose of continuously receiving the magnetic substances, continuously reducing the regenerative magnetic adsorbent and continuously discharging the reduced magnetic adsorbent. Not only can the system be cooperated with the sewage treatment system and continuously and uninterruptedly operated, but also can efficiently reduce and regenerate the magnetic adsorbent, thereby significantly improving the recovery efficiency of the magnetic adsorbent in the system operation process.

[0011] To improve the regeneration efficiency and economy, further, a first magnetic recovery device is arranged upstream of the feeding device, and the main conveying channel is in communication with the first magnetic recovery device, the first magnetic recovery device is used for receiving the magnetic sludge conveyed from the upstream, and is used for separating and recovering the magnetic substances in the magnetic sludge by magnetic force. In this scheme, the first magnetic recovery device is arranged upstream, and the magnetic substances can be separated from the magnetic sludge by the first magnetic recovery device, and the magnetic substances can be input into the downstream reaction chamber, so that the separated magnetic substances can be treated alone, avoiding the interference of the sludge, and the separated sludge is discharged alone, avoiding entering the reaction chamber, which is beneficial to reducing the addition amount of the regenerant in the reaction chamber, thereby reducing the cost, and the regenerant and the magnetic substances can be more fully contacted and reacted, thereby improving the reduction and regeneration of the magnetic medium.

[0012] To solve the problem of low cost and efficient separation and regeneration of magnetic substances in magnetic sludge, further, a defibrillator is arranged upstream of the first magnetic recovery device, and the defibrillator is in communication with the first magnetic recovery device, the defibrillator is used for receiving the magnetic sludge conveyed from the upstream, and is used for dispersing the magnetic sludge. By arranging the defibrillator, the physical crushing of the magnetic sludge can be realized, which is more conducive to the separation of the magnetic substances in the magnetic sludge in the first magnetic recovery device, can improve the recovery rate of the magnetic substances in the magnetic sludge, and can reduce the content of the residual magnetic substances in the sludge, which is beneficial to reducing the operation cost and energy saving and environmental protection.

[0013] To solve the problem of improving the stability of the system, further, a second cavity is arranged upstream of the feeding device, and the main conveying channel is in communication with the second cavity, the second cavity is in communication with the first magnetic recovery device, and the second cavity is used for receiving and storing the magnetic substances separated by the first magnetic recovery device. In this scheme, the second cavity has a certain capacity, so as to play a buffering, adjusting and preventing overflow role between the reaction chamber and the first magnetic recovery device, so that the operation of the whole system is more stable, and the needs of various working conditions can be met.

[0014] Further, the regeneration reaction device further comprises a stirrer arranged in the reaction chamber, and each stirrer is electrically connected with the controller. So that the regenerant and the magnetic substances can be fully contacted and reacted, which is beneficial to improving the reaction effect and efficiency.

[0015] The fourth aspect of the present application solves the problem that the main conveying channel can be in communication with each reaction chamber in turn and cyclically. In some schemes, the feeding device is provided with at least two discharge ports, the number of discharge ports is matched with the reaction chambers, each discharge port is in communication with the main conveying channel, and each discharge port is arranged at a position in communication with each reaction chamber,

[0016] The action mechanism is a plurality of feeding on-off switches arranged in the feeding device, each feeding on-off switch is electrically connected with the controller, and the controller controls the on-off state of each discharge port through each feeding on-off switch. Thus, each discharge port can be sequentially and cyclically communicated with the corresponding reaction cavity, so that the magnetic material can be continuously conveyed.

[0017] Preferably, the feeding device further comprises at least two sub-conveying channels, one end of each sub-conveying channel is connected with the main conveying channel, and the other end of each sub-conveying channel is respectively provided with a discharge port, and each feeding on-off switch is arranged in each sub-conveying channel. In use, the controller can be used to control the on-off of each feeding on-off switch, so as to control the on-off of each sub-conveying channel.

[0018] To solve the problem of quantitative addition of regenerant, in some schemes, the regenerant adding device comprises a container for arranging and / or storing the regenerant,

[0019] a main adding channel which is in communication with the container and cooperates with the reaction cavity, and is used for outputting the regenerant, and

[0020] an adding pump which is in communication with the main adding channel and is electrically connected with the controller, and is used for outputting the regenerant quantitatively under the control of the controller. By controlling the adding pump through the controller, the regenerant can be quantitatively conveyed into the reaction cavity.

[0021] To solve the problem of sequential and cyclic addition of regenerant, in some schemes, the regenerant adding device further comprises at least two sub-adding channels, one end of each sub-adding channel is connected with the main adding channel, the other end of each sub-adding channel is in communication with each reaction cavity, each sub-adding channel is provided with a dosing on-off switch, and the controller is electrically connected with each dosing on-off switch and is used for controlling the on-off of each dosing on-off switch. In this way, the regenerant can be sequentially and cyclically added into each reaction cavity.

[0022] To discharge the reacted substance in the reaction cavity, in some schemes, the discharging mechanism comprises a sub-discharging channel which is in communication with the reaction cavity, and

[0023] a discharging on-off switch which is electrically connected with the controller, and the controller controls the sequential and cyclic communication and disconnection of each sub-discharging channel through each discharging on-off switch. Thus, the reaction cavities can be sequentially and cyclically emptied.

[0024] To solve the problem of sequential and cyclic communication of the main conveying channel with each reaction cavity, in some schemes, the action mechanism is arranged in the feeding device and is drivingly connected with the main conveying channel, and the action mechanism is used for adjusting the position of the discharge port,

[0025] each reaction cavity is arranged according to a set rule and cooperates with the discharge port,

[0026] The controller controls the position of the discharge port to make the discharge port sequentially and cyclically communicate with each reaction cavity. In this scheme, the position of each reaction cavity is fixed, and the position of the discharge port can be changed by the action mechanism, so that the discharge port can sequentially and cyclically communicate with each reaction cavity under the control of the controller, solving the problem of continuous operation.

[0027] Preferably, the action mechanism is used to drive the linear motion of the discharge port, and each reaction cavity is arranged along a straight line and located on the action path of the discharge port.

[0028] Preferably, the action mechanism is a linear module, a cylinder, an electric push rod or a hydraulic cylinder, so as to adjust the position of the discharge port in a linear direction.

[0029] To solve the problem of sequentially and cyclically adding the regenerant, in some schemes, the regenerant adding device comprises a container for configuring and / or storing the regenerant, a main adding channel for outputting the regenerant, and an adding pump, the main adding channel communicates with the container and cooperates with the reaction cavity, and the adding pump communicates with the main adding channel and is electrically connected with the controller for quantitatively outputting the regenerant under the control of the controller.

[0030] Further comprising at least two sub-adding channels, one end of each sub-adding channel respectively communicates with the main adding channel, and the other end respectively communicates with each reaction cavity, each sub-adding channel is respectively provided with a drug on-off device, and the controller is electrically connected with each drug on-off device for controlling the on-off of each drug on-off device.

[0031] Alternatively, the action mechanism is drivingly connected with the main adding channel for adjusting the position of the main adding channel, and the controller adjusts the position of the main adding channel to make the main adding channel sequentially and cyclically communicate with each reaction cavity.

[0032] To solve the problem of sequentially and cyclically communicating the main conveying channel with each reaction cavity, in some schemes, the regenerative reaction device is movably constrained to the base, and the action mechanism is drivingly connected with the regenerative reaction device, and the action mechanism is used to drive the regenerative reaction device to act relative to the base,

[0033] The discharge port is arranged at a fixed position and located on the action path of each reaction cavity,

[0034] The controller adjusts the position of each reaction cavity to make each reaction cavity sequentially and cyclically communicate with each discharge port. In this scheme, the position of each reaction cavity can be changed, and the position of the discharge port in the feeding device is fixed, so that the position of each reaction cavity can be adjusted to make each reaction cavity sequentially communicate with the discharge port, solving the problem of continuous operation.

[0035] Preferably, the regeneration reaction device is movably constrained to the base, the reaction chambers are arranged in a linear array, and the action mechanism is a linear module or a telescopic device. The action mechanism can drive the linear movement of the reaction chambers to adjust the positions of the reaction chambers in a linear direction, so that the reaction chambers can be matched with the discharge port.

[0036] Preferably, the regeneration reaction device is rotatably constrained to the base, the reaction chambers are arranged along the circumferential direction of the rotation center of the regeneration reaction device, and the action mechanism includes a motor, which is drivingly connected to the regeneration reaction device and electrically connected to the controller. The action mechanism can drive the rotation of the reaction chambers under the control of the controller to adjust the positions of the reaction chambers in a circumferential direction, so that the reaction chambers can be matched with the discharge port in turn.

[0037] To solve the problem of sequentially and cyclically adding the regeneration agent, in scheme one, the regeneration agent adding device is connected to the regeneration reaction device, and the action mechanism is used to drive the synchronous action of the regeneration agent adding device and the regeneration reaction device,

[0038] The regeneration agent adding device includes a container for configuring and / or storing the regeneration agent, a main adding channel for outputting the regeneration agent, an adding pump, and at least two sub-adding channels. The main adding channel is in communication with the container, the container is connected to the regeneration reaction device, one end of each sub-adding channel is in communication with the main adding channel, and the other end of each sub-adding channel is in communication with each reaction chamber. Each sub-adding channel is provided with a dosing on-off device, the controller is electrically connected to each dosing on-off device for controlling the on-off of each dosing on-off device, the adding pump is in communication with the main adding channel and is electrically connected to the controller for quantitatively outputting the regeneration agent under the control of the controller. In this scheme, the regeneration agent adding device and the regeneration reaction device are connected together and can act synchronously, so that the relative positions of the regeneration agent adding device and the reaction chambers remain unchanged, and the controller can be used to control the dosing on-off devices to cyclically and continuously add the regeneration agent.

[0039] In scheme two, the regeneration agent adding device includes a container for configuring and / or storing the regeneration agent, a main adding channel for outputting the regeneration agent, and an adding pump. The main adding channel is in communication with the container, and the adding pump is in communication with the main adding channel and is electrically connected to the controller for quantitatively outputting the regeneration agent under the control of the controller,

[0040] The outlet of the main adding channel is arranged at a fixed position and located on the action path of the reaction chambers. The controller adjusts the positions of the reaction chambers through the action mechanism to make the reaction chambers sequentially and cyclically communicate with the main adding channel.

[0041] To solve the problem of discharging of each reaction chamber, preferably, a receiving container is further arranged below the regeneration reaction device, during the operation of the regenerant feeding device, each sub-discharging channel is always corresponding to the receiving container, and the receiving container is used for receiving the substances discharged from each reaction chamber,

[0042] The receiving container is connected with the main discharging channel, so as to uniformly discharge downstream through the main discharging channel, and the design can solve the problem that the position part of each reaction chamber is fixed due to the operation of the regenerant feeding device, thereby being inconvenient for uniform discharge.

[0043] The fifth aspect of the present application aims to solve the problem of obtaining purer magnetic medium, and further comprises a secondary magnetic recovery device, which is arranged downstream of the regeneration reaction device and connected with the discharging mechanism, and is used for adsorbing and separating the magnetic medium in the mixture through magnetic force. On the one hand, the secondary magnetic recovery device can cooperate with the primary magnetic recovery device to realize two-stage magnetic recovery, and on the other hand, it can obtain pure and adsorbed magnetic medium, so that the regenerated liquid, residual regenerant and the like can be eliminated while the magnetic medium is returned, new pollutants are not introduced into the wastewater, and the amount of returned magnetic medium can be accurately controlled, thereby improving the water discharge effect.

[0044] To solve the problem of improving the separation effect, further, a defibrating machine is arranged between the regeneration reaction device and the secondary magnetic recovery device, the defibrating machine is connected with the reaction chamber through the discharging mechanism and connected with the secondary magnetic recovery device. The defibrating machine can further scatter the mixture, so that the magnetic medium in the mixture is more completely separated, thereby achieving the purpose of improving the separation effect.

[0045] Further, a third cavity is arranged downstream of the secondary magnetic recovery device, the third cavity is connected with the secondary magnetic recovery device, and is used for storing the magnetic medium separated from the secondary magnetic recovery device. This is conducive to improving the stability of the system and is conducive to the system being applicable to different working conditions.

[0046] To solve the problem of automatic continuous operation, further, a monitoring module is further included, the monitoring module is electrically connected with the controller, and is used for monitoring the amount of magnetic substance in the reaction chamber, when the monitoring module monitors that the amount of magnetic substance in the reaction chamber reaches a set threshold value, the controller controls the feeding device to stop conveying the magnetic substance to the reaction chamber, and controls the feeding device to convey the magnetic substance to another reaction chamber. Thus, the continuous receiving and conveying of the magnetic substance can be realized.

[0047] A method for continuously reducing and regenerating magnetic adsorbent by using the regeneration circulation system, the method comprising continuously feeding magnetic substance into a first reaction chamber by a feeding device and synchronously feeding a regenerant with a regenerant feeding device, the regenerant being a regenerant with a quantity of magnetic medium adapted to the quantity of magnetic substance in the reaction chamber, and monitoring the quantity of magnetic substance in the reaction chamber by a monitoring module to determine whether the quantity of magnetic substance reaches a preset threshold value,

[0048] When the preset threshold value is not reached, the feeding device and the regenerant feeding device continue to feed magnetic substance and regenerant into the reaction chamber,

[0049] When the preset threshold value is reached, the feeding of magnetic substance and regenerant into the reaction chamber is stopped, and the feeding device is used to continuously feed magnetic substance into a second reaction chamber, and the regenerant feeding device is used to synchronously feed regenerant into the second reaction chamber,

[0050] The time length after the first reaction chamber is stopped is monitored, and when the time length reaches a preset time length, the reacted mixture in the reaction chamber is discharged by a discharging mechanism,

[0051] The cycle is repeated. Thus, the magnetic adsorbent can be continuously reduced and regenerated with high efficiency.

[0052] A sewage treatment system using magnetic adsorbent with adsorption function as magnetic medium, comprising the regeneration circulation system, an adsorption reaction tank, a magnetic coagulation device arranged downstream of the adsorption reaction tank, and a magnetic separation device arranged downstream of the magnetic coagulation device and used for separating magnetic sludge in sewage, wherein,

[0053] A sludge discharge port in the magnetic separation device is connected to a main conveying channel in the feeding device,

[0054] The discharging mechanism is connected to the upstream of the adsorption reaction tank or the adsorption reaction tank. By using the regeneration circulation system and the existing sewage treatment system, not only the non-dissolved indicators in wastewater can be effectively removed, but also part of the dissolved indicators can be effectively removed, and the existing biochemical process is not needed, thereby effectively solving the deficiencies of the existing biochemical process.

[0055] A sewage treatment process using the sewage treatment system and using magnetic adsorbent with adsorption function as magnetic medium, the process comprising,

[0056] Step 1, mixing wastewater and magnetic medium in the adsorption reaction tank to adsorb at least one dissolved indicator in the wastewater by the magnetic medium;

[0057] Step 2, input the wastewater into the magnetic coagulation reaction device, and add coagulants and flocculants into the magnetic coagulation reaction device, so that the magnetic medium and the pollutants form magnetic flocs, and enter the subsequent magnetic separation equipment along with the wastewater;

[0058] Step 3, the magnetic flocs in the wastewater are separated by the magnetic separation equipment and form magnetic sludge, the magnetic sludge is discharged through the sludge discharge port of the magnetic separation equipment, and is sequentially input into each reaction cavity through the feeding device;

[0059] Step 4, add a quantitative amount of regenerant for the magnetic adsorbent into the reaction cavity, so as to reduce and regenerate the magnetic adsorbent by using the regenerant;

[0060] Step 5, the regenerated magnetic adsorbent is quantitatively returned to the upstream of the adsorption reaction box or the adsorption reaction box by the return pump, so that the magnetic adsorbent is repeatedly used. By using the process, not only the non-soluble indicators in the wastewater can be effectively removed, but also part of the soluble indicators can be effectively removed, without cooperating with the existing biochemical process, and the magnetic adsorbent can be regenerated and recycled, which can not only solve the regeneration and recycling problems of the magnetic adsorbent, but also better, more efficiently and more economically purify the wastewater.

[0061] Compared with the prior art, the regenerated recycling system, the sewage treatment system, the method and the process provided by the application have good universality, can be continuously operated, can efficiently reduce and regenerate the magnetic adsorbent capable of adsorbing soluble indicators, and can significantly improve the recovery efficiency of the magnetic adsorbent. BRIEF DESCRIPTION OF DRAWINGS

[0062] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0063] Figure 1 The first regenerated recycling system provided for the embodiment 1 of the application is shown in the structure diagram.

[0064] Figure 2 The second regenerated recycling system provided for the embodiment 1 of the application is shown in the structure diagram.

[0065] Figure 3 The first regenerated recycling system provided for the embodiment 2 of the application is shown in the partial top view.

[0066] Figure 4 The second regenerated recycling system provided for the embodiment 2 of the application is shown in the partial top view.

[0067] Figure 5 Partial top view of a second regeneration recycling system provided for Embodiment 2 of the present application.

[0068] Figure 6 Partial top view of a first regeneration recycling system provided for Embodiment 3 of the present application.

[0069] Figure 7 Partial top view of a second regeneration recycling system provided for Embodiment 3 of the present application. Figure 6 Partial top view of a second regeneration recycling system provided for Embodiment 3 of the present application.

[0070] Figure 8 Partial top view of a second regeneration recycling system provided for Embodiment 3 of the present application.

[0071] Figure 9 Partial top view of a second regeneration recycling system provided for Embodiment 3 of the present application. Figure 8 Partial top view of a second regeneration recycling system provided for Embodiment 3 of the present application.

[0072] Figure 10 Structure diagram of a first-stage magnetic recovery device in a regeneration recycling system provided for Embodiment 4 of the present application.

[0073] Figure 11 Structure diagram of a regeneration recycling system provided for Embodiment 5 of the present application.

[0074] Figure 12 Structure diagram of a sewage treatment system provided for Embodiment 6 of the present application.

[0075] Marking explanation

[0076] Regeneration reaction device 100, regeneration reactor 101, reaction cavity 102, stirrer 103

[0077] Main conveying passage 201, feeding on-off device 202, conveying pump 203, sub-conveying passage 204, discharge port 205

[0078] Sub-discharging passage 301, discharging pump 302, discharging on-off device 303, main discharging passage 304

[0079] Container 401, main dosing passage 402, dosing on-off device 403, dosing pump 404, sub-dosing passage 405

[0080] First-stage magnetic recovery device 500, shell 501, first cavity 502, first outlet 503, motor 504, magnetic drum 505, scraper mechanism 506, second cavity 507, defibrillator 508, pipeline 509

[0081] Cylinder 600, shelf 601

[0082] Base 701, receiving container 702, guide rail 703, sliding block 704, rotating shaft 705, driving gear 706, driven gear 707, bearing 708

[0083] secondary magnetic recycling device 801, third cavity 802, return pipe 803, return pump 804

[0084] adsorption reaction box 901, magnetic coagulation reaction device 902, magnetic separation device 903. DETAILED DESCRIPTION

[0085] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0086] Embodiment 1

[0087] In the present embodiment, a regeneration recycling system suitable for a magnetic adsorbent with adsorption function is provided, which can realize the recycling, regeneration and recycling of the magnetic adsorbent. For the convenience of description, in the present embodiment, the magnetic adsorbent with adsorption function (such as a magnetic adsorbent with ammonia-nitrogen adsorption function (for example, including a porous carrier with a chemical formula of Na2Al2Si2O8·nH2O and SmCo5 particles and Fe3O4 particles present in the pores of the porous carrier, wherein n≥0, and the mass percentage of SmCo5: Fe3O4: carrier is 0.4-10%: 30-50%: 50-70%; the pore size of the pores is 0.35-0.45 nm), a magnetic adsorbent with COD adsorption function (for example, Fe3O4@chitin N-deacetylation), etc.) is taken as the magnetic medium, and the present regeneration recycling system specifically includes a regeneration reaction device 100, a feeding device, a controller and a moving mechanism, wherein,

[0088] As shown in Figure 1 The regeneration reaction device 100 includes at least two reaction cavities 102, each reaction cavity 102 is used to provide a reaction place for a regenerant, and each reaction cavity 102 is provided with a discharge mechanism communicating therewith, and each discharge mechanism is used to discharge the reacted substance in the corresponding reaction cavity 102.

[0089] In the present embodiment, the feeding device includes a main conveying channel 201 and at least one discharge port 205, and each discharge port 205 communicates with the main conveying channel 201, as Figure 1As shown, the discharge port 205 can be connected with each reaction cavity 102, and the main conveying channel 201 is used to receive and convey the magnetic material conveyed from the upstream, and to input the magnetic material into each reaction cavity 102 via the discharge port 205, so that the magnetic material can react with the regenerant in each reaction cavity 102, to realize the regeneration of the magnetic medium. In the implementation, as shown in Figure 1 and Figure 2 As shown, the main conveying channel 201 can be connected with the upstream magnetic material, so as to convey the magnetic material; the magnetic material usually includes the magnetic medium after adsorbing the substance (such as the magnetic medium after adsorbing ammonia nitrogen), usually also includes the magnetic medium without adsorbing the substance and having the adsorbing function, and even includes part of sludge and the like.

[0090] In the embodiment, the controller is electrically connected with the action mechanism, and the controller can control the discharge port 205 to be connected with each reaction cavity 102 in turn and cyclically through the action mechanism, so that the main conveying channel 201 can be connected with each reaction cavity 102 in turn and cyclically, so as to guide the upstream magnetic material to be input into each reaction cavity 102 in turn and cyclically by using the feeding device, and the continuous conveying and regeneration of the magnetic material can be realized.

[0091] Meanwhile, in the embodiment, the controller is electrically connected with each discharge mechanism respectively, so that the controller can also control each discharge mechanism to discharge the reacted material (usually a mixture) in each reaction cavity 102 in turn and cyclically, so as to empty each reaction cavity 102 after the reaction is completed in turn, and the reaction cavity 102 after being emptied can be recycled. In the actual operation, the feeding device and the discharge mechanism can be matched with each other under the control of the controller, so that each reaction cavity 102 can receive the upstream magnetic material in turn, without stopping the conveying process of the magnetic material, so that the continuous operation can be realized, and the regeneration efficiency of the magnetic medium can be significantly improved. Meanwhile, each reaction cavity 102 can react in turn, and can be automatically discharged to the downstream under the control of the controller after the reaction is completed, and the whole process is continuous and smooth, so that the continuous conveying, regeneration and discharge of the magnetic material can be realized.

[0092] In the implementation, the controller can preferentially adopt PLC, single-chip microcomputer and the like, and of course, a PC or an embedded chip can also be adopted.

[0093] More specifically, the main conveying channel 201 can be a conveying pipeline, a conveying groove, a channel and the like, as shown in Figure 1 and Figure 2 As shown, the feeding device also includes a conveying pump 203, as shown in Figure 1 and Figure 2 As shown, the conveying pump 203 can be arranged in the main conveying channel 201, so as to input the magnetic material into the reaction cavity 102 by using the conveying pump 203; the conveying pump 203 can be electrically connected with the controller, so as to control the start-stop, conveying power and the like of the conveying pump 203 by using the controller.

[0094] To form the reaction chambers 102, in one embodiment, the regeneration reaction apparatus 100 may include a regeneration reactor 101, and each of the reaction chambers 102 may be constructed in the regeneration reactor 101. In another embodiment, the regeneration reaction apparatus 100 may include at least two regeneration reactors 101, and each reaction chamber 102 may be constructed in each regeneration reactor 101, such as... Figure 1 and Figure 2 As shown, in this embodiment, the regeneration reactor 101 is installed in a fixed position, such as on the ground. The regeneration reactor 101 is constructed with an opening to connect to the discharge port 205. For example, as shown... Figure 1 and Figure 2 As shown, the opening is located at the upper end of the regeneration reactor 101. In a more complete embodiment, the regeneration reaction apparatus 100 also includes a stirrer 103 disposed in the reaction chamber 102, such as... Figure 1 and Figure 2 As shown, the stirrer 103 can be electrically connected to the controller so that the regenerator and the magnetic material can fully contact and react, which is beneficial to improving the reaction effect and efficiency.

[0095] To ensure that the feeding device can sequentially and cyclically connect to each reaction chamber 102, for example, in this embodiment, the feeding device is equipped with at least two discharge ports 205, each discharge port 205 being connected to the main conveying channel 201. For example, the number of discharge ports 205 can be the same as the number of reaction chambers 102; and each discharge port 205 is respectively located at a position connected to each reaction chamber 102, that is, each discharge port 205 is respectively connected to each reaction chamber 102, such as... Figure 1 and Figure 2 As shown.

[0096] In this embodiment, the actuating mechanism can be configured in the feeding device to control the on / off state of each discharge port 205, so that the controller can adjust the on / off state of each discharge port 205 through the actuating mechanism, thereby allowing each discharge port 205 to be sequentially and cyclically connected to its corresponding reaction chamber 102 to achieve continuous conveying of magnetic materials. For example, in the first embodiment, the feeding device further includes at least two sub-conveying channels 204, one end of each sub-conveying channel 204 being connected to the main conveying channel 201, such as... Figure 1 As shown; each sub-conveying channel 204 has a discharge port 205 at its other end, and each discharge port 205 is connected to each reaction chamber 102; the actuating mechanism can be a feed switch 202 installed in each sub-conveying channel 204, such as Figure 1As shown, each feeding on-off device 202 is electrically connected with the controller. In use, the controller can be used to control the on-off of each feeding on-off device 202, so as to control the on-off of each sub-conveying channel 204, so as to control whether to continue to convey the magnetic substance into the corresponding reaction chamber 102. In implementation, the feeding on-off device 202 can be a valve, a gate, etc., and the sub-conveying channel 204 can be a pipe, a conveying groove, a channel, etc.

[0097] In the second embodiment, the main conveying channel 201 of the feeding device is configured with at least two discharge ports 205, such as Figure 2 As shown, each discharge port 205 corresponds to each reaction chamber 102, and each discharge port 205 is provided with a feeding on-off device 202, and each feeding on-off device 202 is electrically connected with the controller. In use, the controller can control the on-off of each feeding on-off device 202, so as to control the magnetic substance to be discharged from different discharge ports 205 and enter the corresponding reaction chamber 102.

[0098] In order to discharge the reacted substance (usually a mixture, and usually including the reduced magnetic medium, the remaining regenerant, the regenerated liquid generated by reaction, etc., which will not be described below) in the reaction chamber 102, in the present embodiment, the discharge mechanism has various embodiments, for example, the discharge mechanism includes a sub-discharge channel 301 and a discharge pump 302. One end of the sub-discharge channel 301 can be connected with the bottom of the reaction chamber 102 via the upper part of the reaction chamber 102, and the discharge pump 302 is arranged in the sub-discharge channel 301. The discharge pump 302 is electrically connected with the controller, so that the discharge pump 302 can be used to provide a discharge power to convey the substance in each reaction chamber 102 out, such as Figure 1 and Figure 2 As shown, the purpose of emptying the reaction chamber 102 is achieved. For another example, the bottom of each reaction chamber 102 is configured with a discharge port, and the discharge mechanism includes a discharge on-off device 303 and a sub-discharge channel 301 connected with the discharge port. The discharge on-off device 303 is used to control the on-off of the discharge port. In implementation, the discharge on-off device 303 can be arranged at the discharge port, or can be arranged in the sub-discharge channel 301, such as Figure 1 and Figure 2As shown, each discharge switch 303 is electrically connected with the controller, and when the reaction in the reaction chamber 102 is completed, the controller can open the discharge port through the discharge switch 303 to discharge the substance in the reaction chamber 102 downwardly by gravity, so as to empty the reaction chamber 102. After being emptied, the controller can close the discharge port through the discharge switch 303, so as to continuously feed the magnetic substance into the reaction chamber 102, thereby entering the next regeneration and discharge cycle process. In this way, the regeneration and discharge of the magnetic medium can be continuously completed for the subsequent recycling of the regenerated magnetic medium. Of course, in this embodiment, the sub-discharge channel 301 can also be provided with a discharge pump 302 to provide discharge power by means of the discharge pump 302 without the action of gravity. In a more perfect scheme, a main discharge channel 304 is further included, as shown in Figure 1 and Figure 2 As shown, the sub-discharge channel 301 of each discharge mechanism can be connected with the main discharge channel 304 to be uniformly fed and discharged by means of the main discharge channel 304.

[0099] In order to facilitate the addition of the regenerant into each reaction chamber 102, the present regeneration cycle system further includes a regenerant adding device. The regenerant adding device is matched with each reaction chamber 102 and is used to add an appropriate amount of regenerant suitable for the magnetic medium into each reaction chamber 102, so that the regenerant can fully react with the magnetic substance in the reaction chamber 102 to reduce and / or regenerate the magnetic medium, which is beneficial to the recycling of the magnetic medium. As an example, in the present embodiment, the regenerant adding device includes a container 401 for configuring and / or storing the regenerant, a main adding channel 402 for outputting the regenerant, and at least two sub-adding channels 405. The main adding channel 402 is connected with the container 401, one end of each sub-adding channel 405 is connected with the main adding channel 402, the other end of each sub-adding channel 405 is connected with each reaction chamber 102, and each sub-adding channel 405 is provided with a dosing switch 403, as shown in Figure 1 and Figure 2 As shown, each dosing switch 403 is electrically connected with the controller, so that the controller can control the opening and closing of each sub-adding channel 405 through each dosing switch 403, thereby controlling each sub-adding channel 405 to be connected with each reaction chamber 102 in turn and cyclically, so as to continuously and uninterruptedly add the regenerant. In one embodiment, the container 401 can be arranged at a position higher than each reaction chamber 102 to provide power for the regenerant to enter each reaction chamber 102 by means of the gravity difference. In another embodiment, the regenerant adding device further includes an adding pump 404, which can be arranged in the main adding channel 402, as shown in Figure 3 and Figure 4As shown, the dosing pump 404 can provide power for the delivery of the regenerant, and in actual implementation, the dosing pump 404 can be electrically connected to the controller so as to be controlled by the controller in terms of start-stop, running power, etc.

[0100] To facilitate the judgment of whether the amount of the magnetic substance received in the reaction cavity 102 reaches the set threshold value, the system further comprises a monitoring module electrically connected to the controller, for monitoring the amount of the magnetic substance in the reaction cavity 102. When the monitoring module monitors that the amount of the magnetic substance in the reaction cavity 102 reaches the set threshold value, the controller can control the feeding device to stop delivering the magnetic substance to the reaction cavity 102, and control the feeding device to deliver the magnetic substance to another reaction cavity 102, so as to achieve the purpose of continuous operation through this way of receiving the magnetic substance in turns. The monitoring module has various implementation modes. For example, the monitoring module can comprise a flow meter arranged in the main conveying channel 201, the flow meter being electrically connected to the controller, and the flow meter being used to monitor the flow of the main conveying channel 201, and the controller can calculate the amount of the magnetic substance in the reaction cavity 102 according to the opening time of the feeding on-off device 202 corresponding to the reaction cavity 102 and the flow data fed back by the flow meter. For another example, the monitoring module can further comprise a sensor arranged in each reaction cavity 102, the controller being electrically connected to the sensor, and the sensor being used to monitor the amount of the magnetic substance in the reaction cavity 102. In actual implementation, the sensor can preferentially adopt a liquid level sensor, the liquid level sensor can monitor the liquid level height of the magnetic substance in each reaction cavity 102, and the controller can calculate the amount of the magnetic substance in the corresponding reaction cavity 102 according to the liquid level height fed back by the sensor. When the liquid level in the reaction cavity 102 reaches the set height (threshold value), the controller controls the feeding on-off device 202 corresponding to the reaction cavity 102 to be closed, and can control the feeding on-off device 202 corresponding to another reaction cavity 102 (which is in an idle state) to be opened, so that the magnetic substance can continue to be input into the reaction cavity 102, and this cycle can achieve continuous operation. It can be understood that the sensor can also adopt a pressure sensor, so as to detect the amount of the magnetic substance in the reaction cavity 102 through the detection of the pressure at the bottom of the reaction cavity 102. In addition, the monitoring module can further comprise a timer electrically connected to the controller, so as to realize time sequence control through the timer. For example, when the feeding on-off device 202 is opened, the timer can start timing, and when the preset time length is reached, the amount of the magnetic substance in the reaction cavity 102 reaches the threshold value, at this time, the controller can control the current feeding on-off device 202 to be closed and control another feeding on-off device 202 to be opened, and this cycle can also achieve continuous operation. In addition, the state switching of the regenerant dosing and discharging mechanism, etc. can also be realized through time sequence control with the assistance of the timer, which will not be described herein.

[0101] One mode of operation of the system is: initially, each discharge mechanism is in a closed state, the controller controls one of the feed on-off devices 202 to open, so as to input magnetic material into the first reaction chamber 102; when the monitoring module detects that the amount of magnetic material in the reaction chamber 102 reaches the set threshold value, the controller controls the feed on-off device 202 corresponding to the reaction chamber 102 to close, and controls the feed on-off device 202 corresponding to the second reaction chamber 102 to open, so as to continuously transport and receive magnetic medium. At the same time, the controller can control the regenerant adding device to add an appropriate amount of regenerant to the first reaction chamber 102, and control the stirrer 103 to start, so that the magnetic material and the regenerant can fully contact and react. It can be understood that the timing of adding the regenerant can be determined according to actual needs, and the required amount of regenerant can be added to the reaction chamber 102 at one time before the magnetic material is input into the reaction chamber 102; or the required amount of regenerant can be added to the reaction chamber 102 at one time after the feed on-off device 202 is closed; or the regenerant can be added to the reaction chamber 102 at one time during the process of inputting the magnetic material into the reaction chamber 102. This mode is beneficial to shorten the time and improve the efficiency. After the regenerant is added, a set time can be reserved to allow the regenerant in the reaction chamber 102 to fully react with the magnetic material, and then the controller can control the discharge mechanism connected to the reaction chamber 102 to open, so as to empty the reaction chamber 102. Finally, the controller can control the discharge mechanism to close, complete the regeneration and discharge of the magnetic medium, and thus continuously regenerate and discharge the magnetic medium to realize continuous operation.

[0102] In addition, based on the regeneration circulation system provided in the embodiment, the embodiment further provides a method for continuously reducing and regenerating magnetic adsorbent. The method uses the regeneration circulation system, and includes continuously transporting magnetic material into the first reaction chamber 102 (i.e., one of the reaction chambers 102) by using the feeding device, and synchronously adding a regenerant for regenerating the magnetic medium into the reaction chamber 102 by using the regenerant adding device, so as to reduce and regenerate the magnetic adsorbent. At the same time, the monitoring module can be used to monitor whether the amount of magnetic material in the reaction chamber 102 reaches the set threshold value in real time,

[0103] During operation, when the amount of magnetic material in the reaction chamber 102 does not reach the set threshold value, the feeding device and the regenerant adding device continue to transport magnetic material and regenerant into the reaction chamber 102.

[0104] When the amount of magnetic substance in the reaction chamber 102 reaches the set threshold, the feeding of magnetic substance and regenerant into the reaction chamber 102 is stopped, and the feeding of magnetic substance into the second reaction chamber 102 (i.e. another reaction chamber 102) is started continuously by the feeding device, and the regenerant is added into the second reaction chamber 102 synchronously by the regenerant adding device, so as to realize the continuous receiving and regeneration of the magnetic substance.

[0105] Meanwhile, the time length after the first reaction chamber 102 stops adding regenerant can be monitored, for example, a timer can be used to count, when the time length reaches the preset time length, the reacted mixture in the reaction chamber 102 can be discharged by the discharging mechanism, so as to achieve the purpose of automatic and continuous discharge.

[0106] Thus, the cycle is repeated, and the magnetic adsorbent can be continuously reduced and regenerated.

[0107] Embodiment 2

[0108] The difference between the present embodiment 2 and the above-mentioned embodiment 1 is that the action mechanism in the regeneration cycle system is different. Specifically, in the present embodiment, the action mechanism can be configured in the feeding device, and the feeding device is provided with a discharge port 205 which is in communication with the main conveying channel 201. The reaction chambers 102 can be arranged according to the set rules respectively. The action mechanism is drivingly connected to the main conveying channel 201. The controller is electrically connected to the action mechanism. The controller adjusts the position of the discharge port 205 through the action mechanism, so that the discharge port 205 is sequentially and cyclically communicated with the reaction chambers 102. That is, in the present embodiment, the positions of the reaction chambers 102 are fixed, and the position of the discharge port 205 can be changed, so that the discharge port 205 can be sequentially and cyclically communicated with the reaction chambers 102 under the driving of the action mechanism.

[0109] In the implementation, the reaction chambers 102 can be arranged linearly or arcuately, as shown in Figure 3 and Figure 4 The reaction chambers 102 can be arranged in a row to cooperate with the discharge port 205. The discharge port 205 can be configured at one end of the main conveying channel 201, and at least part of the main conveying channel 201 is a hose, or a section of hose is arranged in the main conveying channel 201, so that the end of the main conveying channel 201 where the discharge port 205 is configured can form a free end, for example, as shown in Figure 3 and Figure 4As shown, the part of the main conveying channel 201 between the conveying pump 203 and the discharge port 205 can be a hose, so that the position of the discharge port 205 is adjusted by the action mechanism. In the embodiment, one end of the main conveying channel 201 can be fixed to the action mechanism, which has various implementations. For example, the action mechanism can be a linear module, which can be installed on the shelf 601, and one end (i.e., the free end) of the main conveying channel 201 can be fixedly connected to a sliding table in the linear module. The linear module is electrically connected to the controller, so that the sliding table is driven to move under the control of the controller, thereby driving the main conveying channel 201 to move, and changing the position of the discharge port 205, so that the discharge port 205 can be moved above each reaction cavity 102, achieving the purpose of sequentially and cyclically communicating with each reaction cavity 102.

[0110] For another example, the action mechanism can also be a telescopic device such as a pneumatic cylinder 600, an electric push rod, or a hydraulic cylinder. For example, the reaction cavities 102 can be arranged in a row, and the action mechanism is a pneumatic cylinder 600. The cylinder body of the pneumatic cylinder 600 can be fixed to the shelf 601, and one end (i.e., the free end) of the main conveying channel 201 is fixedly connected to the piston rod of the pneumatic cylinder 600, as shown in Figure 3 and Figure 4 The controller is electrically connected to the pneumatic cylinder 600 (actually electrically connected to a control valve arranged in a gas pipe, and the gas pipe communicates the pneumatic cylinder 600 and a gas source), so that the extension / retraction of the pneumatic cylinder 600 is controlled by the controller, driving the main conveying channel 201 to move, thereby changing the position of the discharge port 205, so that the discharge port 205 can be moved above each reaction cavity 102, achieving the purpose of sequentially and cyclically communicating with each reaction cavity 102.

[0111] In addition, the action mechanism can also use a conventional crank-rocker mechanism, which will not be described one by one here.

[0112] In the embodiment, the discharge mechanism, the regenerant feeding device, and the monitoring module can be the same as those in Embodiment 1, as shown in Figure 5 or Figure 5 which will not be described here. In addition, another regenerant feeding device can also be used in the embodiment. For example, the regenerant feeding device can only include a main feeding channel 402, without a sub-feeding channel 405. In this case, one end of the main feeding channel 402 is in communication with the container 401 of the regenerant feeding device, and the other end can be fixed to the action mechanism, as shown in Figure 6As shown, one end of the main feeding channel 402 can be fixed to a sliding table in the linear module, a telescopic rod in the air cylinder 600, etc., so that the action mechanism can adjust the positions of the discharge port 205 and the main feeding channel 402 synchronously under the control of the controller, so that the discharge port 205 and the main feeding channel 402 can be communicated with each reaction cavity 102 synchronously to deliver the magnetic substance and the regenerant to each reaction cavity 102. In implementation, one action mechanism can be included, and at this time, the action mechanism can be connected to the main feeding channel 402 and the main feeding channel 402 synchronously to drive the main feeding channel 201 and the main feeding channel 402 synchronously, as shown in Figure 7 Two action mechanisms can also be included, and the two action mechanisms are connected to the main feeding channel 201 and the main feeding channel 402 respectively to drive the main feeding channel 201 and the main feeding channel 402 respectively.

[0113] Embodiment 3

[0114] The difference between this embodiment 3 and the above-mentioned embodiments is that the action mechanism in the regeneration cycle system is different. Specifically, in this embodiment, the positions of the reaction cavities 102 can be changed by the action mechanism, and the position of the discharge port 205 in the feeding device can be fixed, so that the reaction cavities 102 can be communicated with the discharge port 205 in turn by adjusting the positions of the reaction cavities 102.

[0115] In implementation, the regeneration reaction device 100 can be movably constrained to the base 701, the base 701 can be installed on the ground, the action mechanism can be arranged on the base 701 and connected to the regeneration reaction device 100, and the action mechanism is used to drive the regeneration reaction device 100 to move relative to the base 701; at the same time, the feeding device is provided with the discharge port 205, the discharge port 205 is communicated with the main feeding channel 201, and the discharge port 205 can be arranged at a fixed position, as shown in Figure 6 and Figure 7 The controller can drive the regeneration reaction device 100 to move by the action mechanism to adjust the positions of the reaction cavities 102, so that the reaction cavities 102 can be communicated with the discharge port 205 of the feeding device in turn and cyclically. For example, in the first embodiment, the regeneration reaction device 100 can be movably constrained to the base 701, as shown in Figure 6 and Figure 7As shown, the reaction cavities 102 can be arranged in a row, and the moving direction of the regeneration reaction device 100 is consistent with the arrangement direction of the reaction cavities 102. The discharge port 205 can be arranged at a fixed position and located on the moving path of the reaction cavities 102, so that the position of each reaction cavity 102 can be adjusted along a straight line by the action mechanism, and each reaction cavity 102 can be moved to the lower side of the discharge port 205 to realize the sequential and cyclic communication. In order to realize the straight line movement, the action mechanism has various embodiments, for example, the action mechanism can be a conventional linear module, the linear module can be installed on the base 701, and the regeneration reaction device 100 can be fixedly installed on the sliding table in the linear module. The linear module is electrically connected with the controller to drive the regeneration reaction device 100 to move linearly under the control of the controller. For another example, the action mechanism can also be a telescopic device such as a pneumatic cylinder 600, an electric push rod, a hydraulic cylinder, etc. For example, as shown in Figure 6 and Figure 7 The regeneration reaction device 100 can be movably installed on the base 701 through the cooperation of the guide rail 703 and the sliding block 704. The action mechanism can adopt the pneumatic cylinder 600, the cylinder body of which can be fixed to the base 701, and the piston rod of which can be connected to the regeneration reaction device 100. As shown in Figure 8 and Figure 9 The controller is electrically connected with the pneumatic cylinder 600 (actually connected with the control valve, which is arranged on the air pipe, and the air pipe communicates the pneumatic cylinder 600 and the air source) to control the extension / retraction of the pneumatic cylinder 600 by the controller, drive the linear movement of the regeneration reaction device 100, change the position of each reaction cavity 102, and move each reaction cavity 102 to the lower side of the discharge port 205 to realize the sequential and cyclic communication with the discharge port 205.

[0116] For another example, in the second embodiment, the regeneration reaction device 100 can be rotatably constrained to the base 701, and each reaction cavity 102 can be arranged along the circumferential direction of the rotation center of the regeneration reaction device 100. For example, as shown in Figure 8 and Figure 9 The action mechanism is arranged on the base 701 and drivingly connected with the regeneration reaction device 100, so that the controller can drive the rotation of the regeneration reaction device 100 relative to the base 701 through the action mechanism to change the position of each reaction cavity 102. The discharge port 205 can be arranged at a fixed position and located on the moving path of the reaction cavities 102. Each reaction cavity 102 can be moved to the lower side of the discharge port 205 under the driving of the action mechanism to realize the sequential and cyclic communication. In order to realize the rotatable installation of the regeneration reaction device 100, various embodiments are provided, for example, the lower end of the regeneration reaction device 100 is connected with a rotating shaft 705, as shown in Figure 9 and Figure 6- Figure 9As shown, each reaction cavity 102 is arranged along the circumferential direction of the rotating shaft 705, the rotating shaft 705 can be rotatably installed on the base 701 through a bearing 708, and the action mechanism can include a motor 504 fixed on the base 701 and in transmission connection with the rotating shaft 705, the motor 504 is electrically connected with the controller, so as to drive the rotating shaft 705 to rotate under the control of the controller, so as to adjust the position of each reaction cavity 102; in implementation, the motor 504 can be in transmission connection with the rotating shaft 705 through one or more combinations of a shaft coupling, a gear transmission mechanism, a belt transmission mechanism, etc., for example, as shown in Figure 7 As shown, the rotating shaft 705 is provided with a driven gear 707, the motor 504 is in transmission connection with a driving gear 706, the driving gear 706 is in meshing connection with the driven gear 707, so that the motor 504 can drive the rotating shaft 705 to rotate, thereby driving the regeneration reaction device 100 to rotate. In addition, the regeneration reaction device 100 can also be constructed as a rotary body structure, so that the regeneration reaction device 100 itself can be connected to the base 701 through the bearing 708, without the need to set the rotating shaft 705, at this time, the action mechanism can directly drive the regeneration reaction device 100 to rotate, for example, the driven gear 707 can be directly constructed or installed on the outer surface of the regeneration reaction device 100, so that the motor 504 in the action mechanism can drive the regeneration reaction device 100 to rotate through the meshing connection of the driving gear 706 and the driven gear 707.

[0117] Since the position of the regeneration reaction device 100 will change, in order to receive the substances discharged from the reaction cavities 102, as an example, each sub-discharge channel 301 can be a hose, so as not to affect the movement of the regeneration reaction device 100, as another example, a receiving container 702 is also arranged below the regeneration reaction device 100, as shown in Figure 9 As shown, the receiving container 702 can be arranged on the base 701, the receiving container 702 is used for receiving and storing the substances discharged from each reaction cavity 102, and the sub-discharge channel 301 in communication with each reaction cavity 102 is aligned with the receiving container 702 below, as shown in Figure 7 As shown, so that no matter where the regeneration reaction device 100 is rotated to, the sub-discharge channel 301 of each reaction cavity 102 can be in communication with the receiving container 702 below. As another example, in the case of arranging the rotating shaft 705, the rotating shaft 705 can be constructed with a central passage, and the sub-discharge channel 301 in communication with each reaction cavity 102 can be in communication with the central passage, as shown in Figure 9 As shown, so that the substances in each reaction cavity 102 are discharged downstream into the receiving container 702 below through the central passage, since the position of the central passage and each reaction cavity 102 is relatively fixed, the discharge problem during the movement of the regeneration reaction device 100 can be effectively solved, it can be understood that, at this time, the main discharge channel 304 can be in communication with the receiving container 702, as shown inFigure 6 and Figure 7 so as to be connected as a whole to the downstream.

[0118] The regeneration reaction device 100 has various embodiments, for example, the regeneration reaction device 100 can include one regeneration reactor 101, and each reaction chamber 102 is configured in the regeneration reactor 101, and for another example, the regeneration reaction device 100 can include a rack and at least two regeneration reactors 101, each of which is configured with a reaction chamber 102, and each of which is fixedly installed on the rack, so that each of the regeneration reactors 101 and the rack can be connected as a whole to synchronize action.

[0119] In order to facilitate the addition of regenerant to the reaction chamber 102, as an example, the regenerant adding device can be connected to the regeneration reaction device 100, that is, the regenerant adding device and the regeneration reaction device 100 can be connected as a whole, for example, the regenerant adding device of the present embodiment can have the same structure as the regenerant adding device provided in Embodiment 1, the difference is that in the present embodiment, the container 401 of the regenerant adding device is fixedly connected to the regeneration reaction device 100, or directly configured in the regeneration reaction device 100, so that the action mechanism can drive the regenerant adding device and the regeneration reaction device 100 to synchronize action. As a second example, since the discharge port 205 in the feeding device can be arranged at a fixed position, similarly, the outlet of the main adding channel 402 in the regenerant adding device can also be arranged at a fixed position like the discharge port 205, and located on the action path of each reaction chamber 102, so that the controller can adjust the position of each reaction chamber 102 through the action mechanism, so that each reaction chamber 102 can be connected in turn and circulation with the main adding channel 402, for example, as shown in Figure 6- Figure 9 and Figure 1 the outlet of the main adding channel 402 can be arranged at a position close to the discharge port 205, as shown in Figure 2 so as to cooperate with each reaction chamber 102, and the remaining structure of the regenerant adding device can be the same as the previous embodiment, which will not be repeated here.

[0120] Embodiment 4

[0121] In order to improve the regeneration efficiency and the economy of regeneration, in the present regeneration circulation system, a first magnetic recovery device 500 is arranged upstream of the feeding device, and the feeding device and the first magnetic recovery device 500 are connected, and the first magnetic recovery device 500 is used to receive the magnetic sludge transported from the upstream, and can separate and recover the magnetic material (including magnetic medium) in the magnetic sludge by magnetic force. In the implementation, the first magnetic recovery device 500 can adopt the existing magnetic recovery device, such as the existing disc type magnetic separator or drum type magnetic separator, etc., so as to recover the magnetic material in the magnetic sludge by the principle of magnetic adsorption. For example, as shown inFigure 10 , Figure 10 as well as Figure 1 As shown, the primary magnetic recovery device 500 includes a housing 501, a motor 504 disposed in the housing 501, a magnetic drum 505, and a scraper mechanism 506 adapted to the magnetic drum 505. A first cavity 502 is constructed inside the housing 501, and the magnetic drum 505 is disposed within the first cavity 502, with a magnet disposed inside the magnetic drum 505. The motor 504 is drive-connected to the magnetic drum 505 to drive its rotation, thereby continuously adsorbing magnetic substances from the magnetic sludge. The scraper mechanism 506 is disposed on one side of the magnetic drum 505 and cooperates with it to scrape off the magnetic substances adsorbed on the magnetic drum 505. The scraped-off magnetic substances can enter the reaction chamber 102 through a feeding device. Figure 2 As shown; simultaneously, the housing 501 of the primary magnetic recovery device 500 also has a first outlet 503, which is connected to the first cavity 502 for discharging the separated sludge, thereby separating the magnetic material from the sludge for subsequent separate processing of the magnetic material and the sludge, such as... Figure 1- Figure 6 and Figure 1 As shown.

[0122] To facilitate the coordination between the main conveying channel 201 and the primary magnetic recovery device 500, such as Figure 10 As shown, a second chamber 507 is also provided upstream of the feeding device. The feeding device is connected to the second chamber 507, which is also connected to the primary magnetic recovery device 500. The second chamber 507 is used to receive and store the magnetic material separated by the primary magnetic recovery device 500. The second chamber 507 has a certain capacity to buffer, regulate, and prevent overflow between the reaction chamber 102 and the primary magnetic recovery device 500, making the entire system more stable and able to meet the needs of various working conditions. In implementation, the second chamber 507 can be constructed as a separate component, connected to the primary magnetic recovery device 500 via a pipe 509. Alternatively, the second chamber 507 can be constructed within the housing 501 of the primary magnetic recovery device 500, for example... Figure 1 and Figure 10 As shown, the first cavity 502 and the second cavity 507 can be connected in series, and the first cavity 502 and the second cavity 507 are interconnected, allowing the magnetic material scraped off the magnetic drum 505 to fall into the second cavity 507. Furthermore, a stirrer 103 can also be installed inside the second cavity 507, such as... Figure 1 and Figure 10The stirrer 103 is used to stir the separated magnetic substance, and the stirrer 103 can also be electrically connected to the controller to start and stop under the control of the controller. In the implementation, one end of the main conveying channel 201 is connected to the second cavity 507, and the conveying pump 203 can be used to provide conveying power, so that the magnetic substance in the second cavity 507 can be conveyed out along the main conveying channel 201. At this time, the main conveying channel 201 can be configured with the feeding on-off device 202 or without the feeding on-off device 202.

[0123] In a further aspect, the regeneration recycling system further comprises a defiberer 508, which is arranged upstream of the primary magnetic recovery device 500 and is connected to the primary magnetic recovery device 500, as shown in Figure 10 and Figure 11 The defiberer 508 is mainly used to disperse the magnetic sludge to achieve physical crushing, which is more conducive to separating the magnetic substance from the magnetic sludge in the primary magnetic recovery device 500, can significantly improve the recovery rate of the magnetic substance in the magnetic sludge, and can reduce the content of the residual magnetic substance in the sludge, which is not only conducive to reducing the operating cost, but also conducive to energy saving and environmental protection. In the implementation, the defiberer 508 can use an existing high-speed defiberer 508, for example, the defiberer 508 comprises a shell, a defibering cutter disc, and a motor 504. The shell is configured with a defibering cavity, the defibering cutter disc is arranged in the defibering cavity and is in transmission connection with the motor 504, and the motor 504 can be electrically connected to the controller. The defibering cavity of the defiberer 508 can be connected to the first cavity 502 in the primary magnetic recovery device 500 through the pipeline 509, and can be connected to the upstream through the pipeline 509 to input the magnetic sludge. The defiberer 508 and the primary magnetic recovery device 500 can also be an integrated structure, as shown in Figure 11 At this time, the defibering cavity of the defiberer 508 can be connected to the first cavity 502 of the primary magnetic recovery device 500 through the communication hole.

[0124] Embodiment 5

[0125] Since the substance discharged from the reaction cavity 102 is not pure magnetic medium, but a mixture containing not only the magnetic medium and the regenerated liquid after reaction, but also the remaining regenerant, etc., if the mixture is directly recycled, not only new pollutants will be introduced into the wastewater, but also the addition amount of the magnetic medium cannot be accurately controlled, which is not conducive to improving the effluent effect. To solve this technical problem, the difference between the embodiment 5 and the above-mentioned embodiments is that the regeneration recycling system further comprises a secondary magnetic recovery device 801, as shown in Figure 10As shown, the secondary magnetic recovery device 801 is arranged downstream of the regeneration reaction device 100 and is connected to the discharge mechanism, and the secondary magnetic recovery device 801 is used to adsorb and separate the magnetic medium in the mixture by magnetic force. On the one hand, by arranging the secondary magnetic recovery device 801, cooperation with the primary magnetic recovery device 500 can be achieved to realize two-stage magnetic recovery. On the other hand, pure and adsorptive magnetic medium can be obtained, so that the influence of the regeneration liquid, the remaining regenerant, etc. can be eliminated while the magnetic medium is refluxed, new pollutants are not introduced into the wastewater, and since only the magnetic medium is refluxed, it is beneficial to accurately control the amount of magnetic medium refluxed and improve the water outlet effect.

[0126] In implementation, the secondary magnetic recovery device 801 can be connected to each sub-discharge channel 301, for example, as shown in Figure 11 As shown, each sub-discharge channel 301 can be connected to the main discharge channel 304 (including direct connection and indirect connection), and the main discharge channel 304 can be connected to the secondary magnetic recovery device 801, so that the mixture discharged from each reaction chamber 102 can enter the secondary magnetic recovery device 801 through the corresponding sub-discharge channel 301 and the main discharge channel 304.

[0127] In implementation, the structure of the secondary magnetic recovery device 801 can be the same as that of the primary magnetic recovery device 500, as shown in Figure 11 and Figure 11 As preferred, the secondary magnetic recovery device 801 can use existing magnetic recovery devices, such as existing disc-type magnetic separators or drum-type magnetic separators, etc., to recover the magnetic medium in the mixture by using the principle of magnetic adsorption. For example, the secondary magnetic recovery device 801 includes a housing 501, a motor 504 arranged in the housing 501, a magnetic drum 505, and a scraper mechanism 506 adapted to the magnetic drum 505, the housing 501 is configured with a first cavity 502, the magnetic drum 505 is arranged in the first cavity 502, the motor 504 is in driving connection with the magnetic drum 505 for driving the magnetic drum 505 to rotate, the scraper mechanism 506 is arranged on one side of the magnetic drum 505 and cooperates with the magnetic drum 505 for scraping off the magnetic medium adsorbed on the magnetic drum 505, and the scraped-off magnetic medium can be refluxed through a reflux pipeline 803 for reuse, as shown in Figure 11 Meanwhile, the housing 501 of the secondary magnetic recovery device 801 is also configured with a first outlet 503 connected to the first cavity 502 for discharging the mixture after the magnetic medium is separated. In a more perfect scheme, a reflux pump 804 is also included, as shown in Figure 11 The reflux pump 804 can be arranged in the reflux pipeline 803 to provide power for conveying the magnetic medium. In implementation, a controller can be electrically connected to the reflux pump 804 for controlling the reflux pump 804 to accurately control the amount of magnetic medium refluxed.

[0128] In a more complete solution, the regenerative reaction device 100 is further provided with a defibrillator 508 between the regenerative reaction device 100 and the secondary magnetic recovery device 801, as shown in the figure. The defibrillator 508 can be connected to the reaction cavity 102 through a discharge mechanism and connected to the secondary magnetic recovery device 801, so as to physically break the mixture discharged from the reaction cavity 102 by using the defibrillator 508, and more conducive to separating the pure magnetic medium in the secondary magnetic recovery device 801. Similarly, in practice, the defibrillator 508 can use the existing high-speed defibrillator 508. The defibrillator 508 can be connected to each sub-discharge channel 301 in the discharge mechanism through the main discharge channel 304. The defibrillator 508 and the secondary magnetic recovery device 801 can also be an integrated structure, as shown in the figure. At this time, the defibrillation cavity of the defibrillator 508 can be connected to the first cavity 502 of the secondary magnetic recovery device 801 through the communication hole, and the defibrillation cavity is connected to the main discharge channel 304. In practice, the controller can also be electrically connected to the secondary magnetic recovery device 801 and the defibrillator 508. Figure 11 Figure 11

[0129] In addition, in a more complete solution, a third cavity 802 is further arranged downstream of the secondary magnetic recovery device 801, as shown in the figure. The third cavity 802 is mainly used for storing the magnetic medium separated from the secondary magnetic recovery device 801. One end of the reflux pipeline 803 can be connected to the third cavity 802, so as to transport the magnetic medium. Similarly, in practice, the third cavity 802 can be constructed in a separate component, or can be constructed in the shell 501 of the secondary magnetic recovery device 801, as shown in the figure. The first cavity 502 and the third cavity 802 are connected to each other, so that the magnetic medium scraped off from the magnetic drum 505 can fall into the third cavity 802. In addition, the third cavity 802 can also be provided with a stirrer 103, as shown in the figure. The stirrer 103 is used to stir the separated magnetic medium. The stirrer 103 can be electrically connected to the controller, so as to uniformly stir the magnetic medium in the third cavity 802, so as to realize quantitative transportation and addition. Figure 12 Figure 12 ​

[0130] Example 6

[0131] ​​​​​This embodiment 6 provides an example of using the above-mentioned regeneration cycle system in conjunction with a wastewater treatment system that uses a magnetic adsorbent as the magnetic medium. Specifically, it demonstrates a wastewater treatment system that employs a magnetic adsorbent with adsorption function (such as a magnetic adsorbent capable of adsorbing dissolved ammonia nitrogen, comprising a porous carrier with the chemical formula Na2Al2Si2O8·nH2O and SmCo5 particles and Fe3O4 particles present in the pores of the porous carrier, wherein n≥0, and the mass percentage of SmCo5:Fe3O4:carrier is 0.4-10%:30-50%:50-70%; the pore size is 0.35-0.45 nm, and a magnetic adsorbent Fe3O4@chitin N-deacetylated capable of adsorbing dissolved COD) as the magnetic medium. ​ As shown, the wastewater treatment system includes an adsorption reaction tank 901, a magnetic coagulation reaction device 902 located downstream of the adsorption reaction tank 901, and a magnetic separation device 903 located downstream of the magnetic coagulation reaction device 902 for separating magnetic sludge from wastewater.

[0132] The magnetic separation device 903 can be an existing super magnetic separator to separate magnetic sludge from wastewater using the principle of magnetic adsorption. Alternatively, it can be an existing magnetic sedimentation device to separate magnetic sludge from wastewater using the principle of gravity sedimentation. The sludge discharge port of the magnetic separation device 903 is connected to the deflocculator 508 upstream of the primary magnetic recovery device 500 in the aforementioned system, while the return pipe 803 is connected to the upstream of the adsorption reaction tank 901 or to the adsorption reaction tank 901. ​As shown, at runtime, the wastewater is fully mixed with the magnetic medium (magnetic adsorbent with ammonia-nitrogen adsorption function) in the adsorption reaction box 901, and the magnetic medium is used to adsorb the dissolved indicators in the wastewater (for example, ammonia-nitrogen in the wastewater, etc.); then the wastewater is input into the magnetic coagulation reaction device 902, coagulant and flocculant can be added into the magnetic coagulation reaction device 902, so that the magnetic medium and the pollutants can form magnetic flocs in the wastewater, and enter the subsequent magnetic separation equipment 903 along with the wastewater; the magnetic separation equipment 903 can separate the magnetic flocs in the wastewater and form magnetic sludge, so as to achieve the purpose of purifying the wastewater, the purified water is discharged through the water outlet of the magnetic separation equipment 903, while the separated magnetic sludge is discharged through the sludge discharge port of the magnetic separation equipment 903 and enters the above-mentioned system; then the magnetic sludge is first dispersed in the deflocculator 508, the first magnetic recovery device 500 separates and recovers the magnetic material in the magnetic sludge by using magnetic force, and stores it in the second cavity 507; then the magnetic material is input into the reaction cavity 102 by the feeding device, and an appropriate amount of regenerant (for the magnetic adsorbent including the porous carrier with the chemical formula Na2Al2Si2O8·nH2O and the SmCo5 particles and Fe3O4 particles existing in the pores of the porous carrier, the regenerant can be NaCl solution and / or NaOH solution, and for Fe3O4@ chitin N-deacetylation, the regenerant can be an alkaline solution such as NaOH solution) is added into the reaction cavity 102 by the regenerant adding device, so as to exchange the ions (such as dissolved ammonia-nitrogen or dissolved COD) adsorbed in the magnetic medium by using the regenerant, so as to obtain the magnetic medium without dissolved indicators, so that the magnetic medium regains the adsorption capacity, and the purpose of reducing and regenerating the magnetic medium is achieved; after complete reaction, the substances (mixture) in the reaction cavity 102 are discharged into the deflocculator 508, continue to be dispersed, and are discharged into the second magnetic recovery device 801 through the deflocculator 508, the magnetic medium in the substances is separated by using the second magnetic recovery device 801, so as to obtain pure magnetic medium, and store it in the third cavity 802; finally, the magnetic medium can be returned to the upstream of the adsorption reaction box 901 or the adsorption reaction box 901 by the return pump 804, so as to realize the recovery, regeneration and recycling of the magnetic adsorbent (magnetic medium) with ammonia-nitrogen adsorption function. The system not only can effectively remove the non-dissolved indicators in the wastewater, but also can effectively remove part of the dissolved indicators (such as ammonia-nitrogen, etc.), and can realize the regeneration of the magnetic adsorbent, and does not need to be combined with the existing biochemical process, so as to effectively solve the shortcomings of the biochemical process.

[0133] Based on the sewage treatment system provided in the embodiment, the embodiment further provides a sewage treatment process, which uses a magnetic adsorbent with adsorption function as a magnetic medium, and the process comprises,

[0134] Step 1, the wastewater is mixed with the magnetic medium in the adsorption reaction box 901 to adsorb at least one soluble index such as ammonia nitrogen index in the wastewater by the magnetic medium;

[0135] Step 2, the wastewater is input into the magnetic coagulation reaction device 902, and coagulant and flocculant are added into the magnetic coagulation reaction device 902 to make the magnetic medium and the pollutants form magnetic flocs and enter the subsequent magnetic separation equipment 903 along with the wastewater;

[0136] Step 3, the magnetic flocs in the wastewater are separated by the magnetic separation equipment 903 to form magnetic sludge, the magnetic sludge is discharged through the sludge discharge port of the magnetic separation equipment 903, and can be sequentially and circularly input into each reaction cavity 102 through the deflocculator 508, the first magnetic recovery device 500, the second cavity 507, and the feeding device;

[0137] Step 4, the regenerant for the quantitative magnetic adsorbent is sequentially and circularly added into the reaction cavity 102, the regenerant reacts with the magnetic adsorbent to reduce and regenerate the magnetic adsorbent by the regenerant, the reacted substance in the reaction cavity 102 can be discharged through the discharge mechanism, and the pure magnetic adsorbent can be obtained after being scattered by the deflocculator 508 and separated and extracted by the second magnetic recovery device 801, and can be stored in the third cavity 802;

[0138] Step 5, the regenerated magnetic adsorbent is quantitatively returned to the upstream of the adsorption reaction box 901 or the adsorption reaction box 901 by the return pump 804, so that the magnetic adsorbent can be repeatedly used, and the economy can be improved. In addition, by using the process, not only the non-soluble index in the wastewater can be effectively removed, but also part of the soluble index can be effectively removed, without cooperating with the existing biochemical process, and the magnetic adsorbent can be regenerated and recycled, which can not only solve the regeneration and recycling problem of the magnetic adsorbent, but also better, more efficiently and more economically purify the wastewater.

[0139] In the embodiment, the magnetic adsorbent capable of adsorbing soluble ammonia nitrogen is a newly developed magnetic adsorbent, which comprises a porous carrier with a chemical formula of Na2Al2Si2O8·nH2O and SmCo5 particles and Fe3O4 particles existing in the pores of the porous carrier (which can be abbreviated as: SmCo5-Fe3O4 / Na2Al2Si2O8·nH2O), wherein n≥0, and the mass percentage of SmCo5: Fe3O4: carrier is 0.4-10%: 30-50%: 50-70%; the pore size of the pores is 0.35-0.45 nm. The magnetic adsorbent is a magnetic adsorbent synthesized by hydrothermal method using iron ions and metakaolin, and the specific preparation process comprises the following steps: S1, uniformly mixing FeCl2, FeCl3 and pure water to form a first mixture, wherein the amount of FeCl2 and FeCl3 can be prepared according to the stoichiometric ratio capable of generating Fe3O4; S2, adding metakaolin to the first mixture and uniformly mixing to form a second mixture, and the mass ratio of the added metakaolin to the first solution can be adjusted by the technician at will, for example, it can be 1.5:20; S3, adding NaOH solution to the second mixture to adjust the pH of the reaction system to 13-14, and then reacting at a temperature of 70-100°C for 0.5-1h to form a third mixture. In this step, after the addition of NaOH to form the third mixture, Fe 2+ and Fe 3+ react with each other to generate Fe3O4, and metakaolin also reacts to generate a part of sodium aluminosilicate substances in the alkaline environment; S4, adding SmCl3, CoCl2 and NaBH4 to the third mixture for hydrothermal reaction, controlling the reaction temperature to be 60-100°C, the pH to be 13-14, and the reaction time to be 6-10h, and the obtained solid product is the magnetic adsorbent; the sodium aluminosilicate substances can generate hydrothermal crystallization reaction to form the porous molecular sieve Na2Al2Si2O8·nH2O under the hydrothermal condition, and the metakaolin which is not completely reacted in step S3 also continuously reacts with NaOH to generate sodium aluminosilicate substances and further generates hydrothermal crystallization reaction to form the porous molecular sieve Na2Al2Si2O8·nH2O, and at the same time, SmCl3, CoCl2 and NaBH4 react and co-precipitate according to the following equation in the hydrothermal reaction:

[0140] 2SmCl3+10CoCl2+12NaBH4+26NaOH→2SmCo5↓+12NaBO2+26NaCl+35H2↑+2H2O

[0141] The newly generated SmCo5 particles and Fe3O4 particles are deposited in the pores of the porous molecular sieve, that is, the magnetic adsorbent prepared by the present application. The reactions of steps S1-S4 are all carried out under the protection of nitrogen or inert gas. More importantly, in the preparation process, in order to better combine SmCo5, Fe3O4 and Na2Al2Si2O8, the time for continuing the reaction after the third mixture starts to react needs to be strictly controlled to 0.5-1 h, and then SmCl3, CoCl2 and NaBH4 are added. If the time is less than 0.5 h, the adsorption performance of the prepared material will be poor. If the time is more than 1 h, it will affect the combination of SmCo5, Fe3O4 and Na2Al2Si2O8. In order to make the combination between the crystals more compact, the present application does not directly add SmCo5, but makes it react and deposit at the same time through SmCl3, CoCl2 and NaBH4, and the deposition process is synchronized with the construction of the porous structure of the molecular sieve, so that SmCo5 is better distributed in the pores of the molecular sieve. The above-mentioned magnetic adsorbent prepared has a structure in which the inner core is SmCo5 and Fe3O4, and the shell is Na2Al2Si2O8. The magnetic adsorbent has magnetism and the ability to adsorb ammonia nitrogen, and has good adsorption and ion exchange performance. In the embodiment, the Na2Al2Si2O8 in the magnetic adsorbent is a molecular sieve, and the cell pores of the molecular sieve can adsorb ammonia nitrogen in sewage. The ammonia nitrogen exists in the form of ammonium ion in the sewage. The cell pore size of the molecular sieve is generally in the range of 0.38 nm-0.63 nm, and molecules and ions larger than this pore size cannot enter. The ionic diameter of NH4 + is 0.286 nm, so the ammonium ion can enter the cell pores. The Na + in the molecular sieve can be ionized to replace the ammonium ion, and the ammonium ion is attracted into the cell pores by ionic bonds. The cell pores of the molecular sieve have strong polarity and coulomb field, and can adsorb the ammonium ion in the sewage by physical attraction. Therefore, the magnetic adsorbent provided by the present application can adsorb the ammonium ion in the sewage by chemical replacement and physical adsorption, and can achieve better removal effect.

[0142] In the above-mentioned magnetic adsorbent, the addition of SmCo5 in the inner core makes the magnetic susceptibility significantly improved compared with the magnetic adsorbent using Fe3O4 alone. For example, taking SmCo5-Fe3O4 / Na2Al2Si2O8·4.5H2O and Fe3O4 / Na2Al2Si2O8·4.5H2O as examples, as shown in Table 1, the comprehensive performance of the magnetic adsorbent formed by SmCo5 and Fe3O4 is effectively improved, especially the magnetic susceptibility is obviously improved, the proportion of Na2Al2Si2O8·4.5H2O with adsorption performance is increased, the adsorption performance is improved, so that the wastewater treatment effect is significantly improved.

[0143] Table 1 Comparison of two materials

[0144]

[0145] The above description is merely that of a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, and all of them should be covered within the protection scope of the present application.

Claims

1. A regenerative cycle system, characterized by, The controller comprises a control unit, The regeneration reaction device comprises at least two reaction cavities for providing regeneration reaction sites, each reaction cavity is provided with a discharge mechanism connected thereto, and the controller is electrically connected to each discharge mechanism for controlling the discharge mechanism to discharge the reacted substances in each reaction cavity in sequence and circulation, The feeding device comprises a main conveying channel and at least one discharge port connected to the main conveying channel for cooperating with each reaction cavity, the main conveying channel is used for receiving the magnetic substances conveyed from the upstream, and the magnetic substances are input into each reaction cavity through the discharge port, The regeneration agent adding device cooperates with each reaction cavity, and The action mechanism, the discharge mechanism, and the regeneration agent adding device are electrically connected to the controller, the controller controls the discharge port to be sequentially and cyclically connected to each reaction cavity through the action mechanism, and controls the regeneration agent adding device to sequentially and cyclically add the regeneration agent for the magnetic medium into each reaction cavity, and controls the discharge mechanism to sequentially and cyclically discharge the reacted substances in each reaction cavity; wherein the magnetic substances comprise a magnetic medium, the magnetic medium uses a magnetic adsorbent with adsorption function, the magnetic adsorbent comprises a porous carrier with a chemical formula of Na2Al2Si2O8·nH2O and SmCo5 particles and Fe3O4 particles existing in the pores of the porous carrier, wherein n≥0, and the mass percentage of SmCo5:Fe3O4:carrier is 0.4-10%:30-50%:50-70%; the pore diameter of the pores is 0.35-0.45 nm; and the regeneration agent is a NaCl solution and / or a NaOH solution.

2. The regenerative cycle system according to claim 1, characterized by, The feeding device is provided with at least two discharge ports, the number of the discharge ports is adapted to the reaction cavities, each discharge port is connected to the main conveying channel, and each discharge port is arranged at a position connected to each reaction cavity, and the action mechanism is a plurality of feeding on-off switches arranged in the feeding device, each feeding on-off switch is electrically connected to the controller, and the controller controls the on-off state of each discharge port through each feeding on-off switch; The regeneration agent adding device comprises a container for configuring and / or storing the regeneration agent, The main adding channel is connected to the container and cooperates with the reaction cavities for outputting the regeneration agent, and The adding pump is connected to the main adding channel and is electrically connected to the controller for quantitatively outputting the regeneration agent under the control of the controller; The discharge mechanism comprises a sub-discharge channel connected to the reaction cavities, and The discharge on-off switch is electrically connected to the controller, and the controller controls the sequential and cyclic connection and disconnection of each sub-discharge channel through each discharge on-off switch.

3. The regenerative cycle system of claim 2, wherein, The feeding device further comprises at least two sub-conveying channels, one end of each sub-conveying channel is connected to the main conveying channel, and the other end is provided with a discharge port, and each feeding on-off switch is arranged in each sub-conveying channel. The regenerant adding device further comprises at least two sub-adding channels, one end of each sub-adding channel is connected with the main adding channel, the other end of each sub-adding channel is connected with each reaction cavity, each sub-adding channel is provided with a medicine adding on-off device, and the controller is electrically connected with each medicine adding on-off device and used for controlling the on-off of each medicine adding on-off device.

4. The regenerative cycle system of claim 1, wherein, The action mechanism is arranged in the feeding device and is drivingly connected with the main conveying channel, and is used for adjusting the position of the discharge port, Each reaction cavity is arranged according to a set rule and cooperates with the discharge port, The controller adjusts the position of the discharge port to make the discharge port sequentially and cyclically communicate with each reaction cavity, Or, The regenerative reaction device is movably constrained on the base, the action mechanism is drivingly connected with the regenerative reaction device, and the action mechanism is used for driving the regenerative reaction device to move relative to the base, The discharge port is arranged at a fixed position and is located on the action path of each reaction cavity, The controller adjusts the position of each reaction cavity to make each reaction cavity sequentially and cyclically communicate with each discharge port.

5. The regenerative cycle system according to any one of claims 1 to 4, characterized by, The upstream of the feeding device is further provided with a first magnetic recovery device, the main conveying channel is connected with the first magnetic recovery device, and the first magnetic recovery device is used for receiving the magnetic sludge conveyed from the upstream and separating and recovering the magnetic substances in the magnetic sludge by magnetic force.

6. The regenerative cycle system of claim 5, wherein, Further comprising a deflocculator, the deflocculator is arranged in the upstream of the first magnetic recovery device and is connected with the first magnetic recovery device, and is used for receiving the magnetic sludge conveyed from the upstream and dispersing the magnetic sludge; And / or the upstream of the feeding device is further provided with a second cavity, the main conveying channel is connected with the second cavity, the second cavity is connected with the first magnetic recovery device, and the second cavity is used for receiving and storing the magnetic substances separated by the first magnetic recovery device; And / or the regenerative reaction device further comprises stirrers arranged in the reaction cavities, and each stirrer is electrically connected with the controller.

7. The recirculating system of any of claims 1-4, wherein, Further comprising a monitoring module, the monitoring module is electrically connected with the controller and is used for monitoring the amount of the magnetic substances in the reaction cavities, when the monitoring module monitors that the amount of the magnetic substances in the reaction cavities reaches a set threshold value, the controller controls the feeding device to stop conveying the magnetic substances to the reaction cavities and controls the feeding device to convey the magnetic substances to another reaction cavity.

8. A method for continuously reducing and regenerating a magnetic adsorbent, using the regenerative circulation system of claim 7, the method comprising: continuously conveying the magnetic substances into a first reaction cavity by using the feeding device, and synchronously adding the regenerant of a quantity of magnetic medium into the first reaction cavity by using the regenerant adding device, while monitoring the amount of the magnetic substances in the first reaction cavity in real time by using the monitoring module, when the set threshold value is not reached, continuously conveying the magnetic substances and the regenerant into the first reaction cavity by using the feeding device and the regenerant adding device, when the set threshold value is reached, stopping conveying the magnetic substances and the regenerant into the first reaction cavity, and starting to continuously conveying the magnetic substances into a second reaction cavity by using the feeding device, and synchronously adding the regenerant into the second reaction cavity by using the regenerant adding device, monitoring the time length after the first reaction chamber stops conveying the magnetic substance, and discharging the mixture in the reaction chamber through a discharging mechanism when the time length reaches a preset time length, and so on.

9. A sewage treatment system characterised in that, The regeneration cycle system comprises the regeneration cycle system according to any one of claims 1-7, The system further comprises an adsorption reaction tank, a magnetic coagulation reaction device arranged downstream of the adsorption reaction tank, and a magnetic separation device arranged downstream of the magnetic coagulation reaction device and used for separating magnetic sludge in the sewage, The magnetic separation device is connected to the feeding device through a sludge discharge port used for discharging the magnetic sludge, The discharging mechanism is connected to the upstream of the adsorption reaction tank or the adsorption reaction tank.

10. A sewage treatment process characterised in that, The sewage treatment system according to claim 9 is used, and a magnetic adsorbent with adsorption function is used as the magnetic medium, and the process comprises the following steps: Step 1: mixing the wastewater and the magnetic medium in the adsorption reaction tank to adsorb at least one soluble index in the wastewater by the magnetic medium; Step 2: inputting the wastewater into the magnetic coagulation reaction device, and adding a coagulant and a flocculant into the magnetic coagulation reaction device to make the magnetic medium and the pollutants form magnetic flocs and enter the subsequent magnetic separation device along with the wastewater; Step 3: separating the magnetic flocs in the wastewater by the magnetic separation device to form magnetic sludge, discharging the magnetic sludge through a sludge discharge port of the magnetic separation device, and sequentially inputting the magnetic sludge into each reaction chamber through the feeding device; Step 4: adding a regenerant for the magnetic adsorbent into the reaction chamber to reduce and regenerate the magnetic adsorbent by the regenerant; Step 5: returning the regenerated magnetic adsorbent to the upstream of the adsorption reaction tank or the adsorption reaction tank through a return pump to make the magnetic adsorbent repeatedly circulate and be used.

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