Electrolytic oxidation treatment device with descaling function and descaling method

Abstract

The invention discloses an electrolytic oxidation treatment device with a descaling function and a descaling method.The electrolytic oxidation treatment device comprises a power source and a reactor, an anode and a cathode are arranged in the reactor, the output end of the power source is connected with a circuit switching module, and the anode and the cathode are electrically connected with the circuit switching module; an aeration module is further arranged in the reactor, the descaling device further comprises a controller, and the controller is electrically connected with the power source, the circuit switching module and the aeration module. When the device is used, a circuit is firstly switched on for forward electrolysis, then the circuit connection is reversed through the circuit switching module to realize reverse electrolysis, and then the aeration module is started to perform aeration descaling treatment on the anode and the cathode; compared with the prior art, through periodic operation of forward electrolysis and reverse electrolysis, the acid-base environment near the two electrodes is changed, the scaling condition is destroyed, an original scale layer is prone to falling off, meanwhile, the aeration module washes dirt on the surface of a cathode through compressed air, stripping of the dirt is further accelerated, and the service life of the aeration module is prolonged. The dirt separation and dissolution effects are improved.

Description

Technical Field

[0001] The present application relates to the technical field of environmental protection equipment, and in particular to an electrolytic oxidation treatment device with a descaling function and a descaling method. Background Art

[0002] Electrochemical oxidation is a new technology for removing pollutants by direct or indirect electrochemical reactions on electrodes under the action of an external electric field. This technology has high oxidation efficiency, no need to add chemical agents, no sludge, small footprint, and simple operation in the wastewater treatment process. It has gradually been widely used. However, for high-hardness wastewater, during the electrochemical reaction, organic matter undergoes oxidation reaction on the anode surface to produce bicarbonate ions (HCO3 - ), carbonate ions (CO3 2- ), dissolved CO2, etc., and migrate to the entire wastewater, while water molecules undergo reduction reactions on the cathode surface to produce hydroxide ions (OH - ), resulting in a large amount of Ca in the water 2+ Mg 2+ CO3 near the cathode 2- OH - It quickly combines to form precipitates such as calcium carbonate, magnesium carbonate, and magnesium hydroxide, which are precipitated at the cathode. After running for a period of time, the cathode scaling phenomenon is more serious, thus affecting the normal operation of the system.

[0003] The existing technology is unable to achieve thorough cleaning of the dirt on the surface of the electrode cathode, and ultimately requires physical methods or manual cleaning, which not only increases additional processing costs, but also affects the normal operation of the electrolytic oxidation system. Summary of the invention

[0004] The main purpose of the present application is to provide an electrolytic oxidation treatment device and a descaling method with a descaling function, aiming to solve the defect that the cathode scale cannot be effectively removed in the prior art.

[0005] This application achieves the above objectives through the following technical solutions:

[0006] An electrolytic oxidation treatment device with a descaling function comprises a power source;

[0007] A reactor, wherein an anode and a cathode are arranged on the reactor;

[0008] A circuit switching module, wherein an input end of the circuit switching module is electrically connected to the power supply, the anode and the cathode are electrically connected to output ends of the circuit switching module respectively, and the circuit switching module is used to reverse the connection state of the anode and the cathode with the power supply;

[0009] an aeration module, wherein the aeration module is disposed in the reactor;

[0010] A controller is electrically connected to the power supply, the circuit switching module and the aeration module respectively.

[0011] Optionally, the circuit switching module includes a shell, in which a regulating valve core is slidably arranged, and the regulating valve core is provided with a first wiring area and a second wiring area with opposite wiring states, and the shell is also provided with a plurality of elastic joints, one end of each of the elastic joints is respectively connected to the positive pole of the power supply, the negative pole of the power supply, the anode and the cathode, and the other end thereof is electrically connected to the first wiring area or the second wiring area; the shell is also provided with a push-pull electromagnet connected to the regulating valve core.

[0012] Optionally, the first wiring area and the second wiring area are both provided with a positive conductive sheet, a negative conductive sheet, an anode conductive sheet and a cathode conductive sheet, and the positive conductive sheet, the negative conductive sheet, the anode conductive sheet and the cathode conductive sheet respectively correspond to the elastic joints, the anode conductive sheet in the first wiring area is conductively connected to the positive conductive sheet, and the cathode conductive sheet is conductively connected to the negative conductive sheet; the anode conductive sheet in the second wiring area is conductively connected to the negative conductive sheet, and the cathode conductive sheet is conductively connected to the positive conductive sheet.

[0013] Optionally, the first wiring area and the second wiring area are both provided with a plurality of T-shaped plug-in slots, and the positive conductive sheet, the negative conductive sheet, the anode conductive sheet and the cathode conductive sheet all include an integrally connected bottom plate and an abutment plate, and the bottom plate is plugged and connected to the plug-in slots; along the moving direction of the regulating valve core, both ends of the abutment plate are inclined with guide surfaces.

[0014] Optionally, at least two wire threading holes are provided in the first wiring area and the second wiring area on the regulating valve core, and a connecting wire is provided in each of the wire threading holes.

[0015] Optionally, the elastic joint includes an outer shell and a conductive rod slidably arranged in the outer shell, and the outer shell is connected to the shell; a return spring is also arranged in the outer shell, and an extrusion ring is arranged on the conductive rod, and the return spring abuts against the outer shell and the extrusion ring respectively.

[0016] Optionally, the aeration module includes an aeration pipe and an air compressor, wherein the aeration pipe is disposed at the bottom of the reactor, an inlet end of the aeration pipe is connected to the air compressor, and a plurality of exhaust holes are evenly disposed on the aeration pipe.

[0017] Optionally, the descaling device further comprises a circulation pump, wherein the inlet end of the circulation pump is connected to the reactor via a water suction pipe, and the outlet end of the circulation pump is connected to the reactor via a water delivery pipe.

[0018] Correspondingly, the present application also discloses a descaling method based on the above descaling device, comprising the following steps:

[0019] The circuit is turned on by the circuit switching module to perform forward electrolysis to treat the wastewater;

[0020] Reverse the wiring state through the circuit switching module to perform reverse electrolysis;

[0021] Start the aeration module and circulation pump to perform aeration and descaling treatment on the anode and cathode;

[0022] Detect the voltage rise value ΔU of the reactor. If ΔU is greater than 0.5V, the dirt cleaning is unqualified, otherwise it is determined that the dirt cleaning is qualified; if the dirt cleaning is qualified, stop descaling and continue forward electrolysis;

[0023] If the dirt cleaning is unsatisfactory, start the aeration module and the circulation pump for secondary aeration until it is qualified, otherwise stop descaling.

[0024] Optionally, the secondary aeration comprises the following steps:

[0025] Detect the pH of the wastewater. If the pH is ≥ 2, add acid to the reactor until the pH of the wastewater in the reactor is < 2. If the pH is < 2, no acid needs to be added.

[0026] Start the aeration module to perform secondary aeration on the anode and cathode, where the aeration intensity of the secondary aeration is 5-15L / m 2 ·s;

[0027] Start the circulation pump and control the residence time of the wastewater in the reactor to be 1-10 minutes.

[0028] Compared with the prior art, this application has the following beneficial effects:

[0029] The present application includes a power supply and a reactor, wherein an anode and a cathode are arranged in the reactor, an output end of the power supply is connected to a circuit switching module, the anode and the cathode are electrically connected to the output end of the circuit switching module respectively, and the circuit switching module is used to reverse the connection state between the anode and the cathode and the power supply; an aeration module is also arranged in the reactor, and the descaling device further includes a controller, which is electrically connected to the power supply, the circuit switching module and the aeration module respectively;

[0030] Correspondingly, the present application also discloses a descaling method based on the above-mentioned descaling device, firstly, the circuit is turned on for forward electrolysis, and after a period of forward electrolysis (5-10h), the connection state of the anode and cathode with the power supply is reversed by the circuit switching module to achieve reverse electrolysis (3-30s), and then the aeration module is started to aerate and flush the anode and cathode for descaling; finally, by detecting the voltage increase value of the reactor, it is judged whether the dirt is cleaned up properly, and if it is not qualified, aeration is continued until the descaling is qualified;

[0031] In the forward electrolysis process, organic matter undergoes oxidation reaction on the anode surface to produce bicarbonate ions (HCO3 - ), carbonate ions (CO3 2- ), dissolved CO2, etc., water undergoes a reduction reaction on the cathode surface to produce OH - (See reaction formula 1-1), due to the interfacial reaction, OH - , causing the pH near the cathode interface area (not the bulk wastewater) to rise, CO3 2- Increase (see reaction formula (1-2):

[0032] 2H2O + 2e → 2OH - + H2↑ (1-1)

[0033] HCO3 - + OH - → H2O + CO3 2- (1-2)

[0034] Due to the effect of electrostatic attraction, the scale-forming ions Ca in water 2+ Mg 2+ Migrate to the cathode, and finally accumulate near the cathode surface to form CaCO3, MgCO3, Mg(OH)2 and other scale substances and precipitate, causing alkaline substances (OH - 、CO3 2- ) is continuously consumed, which makes the wastewater actually acidic, and the pH can even drop to below 3.

[0035] Since the present application reverses the electrode connection mode, that is, the cathode is connected to the positive electrode of the power supply, and the anode is connected to the negative electrode of the power supply, after the electrode connection mode is switched, the original anode will operate as the cathode, and the original cathode will operate as the anode, thereby changing the original acid-base environment near the two poles, destroying the scaling conditions, causing the original scale layer to peel off and be dissolved by the main acidic wastewater until it disappears.

[0036] Subsequently, the reactor is aerated through an aeration device, that is, compressed air is used to flush the dirt on the cathode surface. On the one hand, the bubbles in the rising process will continuously flush the dirt on the cathode surface, weakening the adhesion of the dirt, further accelerating the peeling of the dirt, and effectively improving the dissolution and separation effect of the dirt; on the other hand, during the aeration process, a large circulation flow rate (5-20m / h) is set for the wastewater in the reactor, so that the dirt is flushed by the wastewater, further improving the dirt peeling effect.

[0037] Compared with the prior art, firstly, after the electrode is reversed, the scale substances generated in large quantities on the original cathode surface can be quickly peeled off and can disappear after being fully dissolved, so the scale removal is thorough and efficient.

[0038] Secondly, the present application can realize the descaling operation by reversing the connection mode of the electrodes, and can still realize the treatment of high-calcium organic wastewater during the descaling process, that is, the entire descaling process and the wastewater treatment process can be carried out simultaneously, and there is no need to stop the machine to remove the dirt, so it can effectively improve the production efficiency;

[0039] Finally, the whole device has a simple structure, and the above functions can be achieved through circuit switching modules, aeration modules, and circulation pumps, and the equipment investment cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic structural diagram of an electrolytic oxidation treatment device with a descaling function provided in Embodiment 1 of the present application;

[0041] Figure 2 An exploded view of an electrolytic oxidation treatment device with a descaling function provided in Embodiment 1 of the present application;

[0042] Figure 3 This is an exploded view of the circuit switching module;

[0043] Figure 4 This is an exploded view of the regulating valve core;

[0044] Figure 5 It is a cross-sectional view of the circuit switching module along the axial direction of the regulating valve core;

[0045] Figure 6 It is a cross-sectional view of the circuit switching module along the radial direction of the regulating valve core;

[0046] Figure 7 Switch schematics for the circuit;

[0047] Figure 8 A flow chart of a descaling method provided in Embodiment 2 of the present application;

[0048] Figure numerals: 1-power supply, 2-reactor, 3-anode, 4-cathode, 5-controller, 6-housing, 7-regulating valve core, 8-first wiring area, 9-second wiring area, 10-elastic joint, 11-electromagnet, 12-positive conductive sheet, 13-negative conductive sheet, 14-anode conductive sheet, 15-cathode conductive sheet, 16-plug-in slot, 17-bottom plate, 18-abutment plate, 19-guide surface, 20-threading hole, 21-connecting wire, 22-aeration pipe, 23-air compressor, 24-exhaust hole, 25-circulation pump, 26-suction pipe, 27-water pipe, 28-installation hole, 101-housing, 102-conductive rod, 103-reset spring, 104-extrusion ring.

[0049] The purpose, features and advantages of this application will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0051] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0054] Implementation Method 1

[0055] Reference Figures 1 to 7 This embodiment is an optional embodiment of the present application, which discloses an electrolytic oxidation treatment device with a descaling function, including a power supply 1 and a reactor 2, wherein the reactor 2 is used to contain wastewater to be treated;

[0056] An anode 3 and a cathode 4 are also provided in the reactor 2. It should be noted that the anode 3 and the cathode 4 are preferably made of the same material, and the anode 3 and the cathode 4 are preferably made of metals such as aluminum and titanium, or one or two of titanium oxide, tin oxide, and lead oxide;

[0057] The descaling device also includes an aeration module, which includes an aeration pipe 22 and an air compressor 23, wherein the aeration pipe 22 is arranged at the bottom of the reactor 2, and one end of the aeration pipe 22 is arranged with the exhaust pipe of the air compressor 23 along the axis of the aeration pipe 22. It should be noted that a blower can also be used to replace the air compressor 23, which is determined according to actual needs, but the air compressor 23 can output high-pressure gas with a higher flow rate, which is conducive to improving the cleaning effect of dirt;

[0058] Along the axis of the aeration tube 22, a plurality of exhaust holes 24 are sequentially arranged on the outer peripheral surface of the aeration tube 22, and the exhaust holes 24 can be evenly arranged;

[0059] Preferably, the exhaust holes 24 can also be divided into two groups, and the two groups of exhaust holes 24 are respectively arranged directly below the anode 3 and the cathode 4, so as to achieve centralized flushing of the cathode 4 and the anode 3;

[0060] Furthermore, each of the exhaust holes 24 can also be distributed in a ring-shaped or plum blossom-shaped structure and arranged around the anode 3 or cathode 4. The structural arrangement of the exhaust holes 24 can form denser annular bubbles, thereby wrapping the entire anode 3 or cathode 4, avoiding dead corners in bubble flushing and improving the flushing quality of dirt.

[0061] The descaling device further comprises a circulation pump 25, the inlet end of the circulation pump 25 is connected to the reactor 2 via a water suction pipe 26, and the outlet end of the circulation pump 25 is connected to the reactor 2 via a water delivery pipe 27; a filter may also be provided on the water suction pipe 26;

[0062] The circulating pump 25 is used to control the continuous circulation of the wastewater to be treated. On the one hand, a flowing water flow is formed, and the anode 3 and the cathode 4 are flushed by the water flow rate, so as to further achieve the stripping effect of the dirt and improve the dirt removal effect and efficiency; on the other hand, the continuously circulating water flow can also bring the stripped dirt out of the reactor 2, and discharge it after being filtered through the filter, so as to avoid the continuous accumulation of dirt in the reactor 2. While reducing the burden on the reactor 2, it can also avoid the influence of dirt accumulation on the flushing airflow.

[0063] The electrolytic oxidation treatment device further includes a circuit switching module, which includes a housing 6, which is in a cylindrical structure as a whole, and a cavity is provided in the housing 6, and a regulating valve core 7 is slidably provided in the cavity, and the regulating valve core 7 is in a cylindrical shape as a whole; the regulating valve core 7 is made of bakelite, and a first wiring area 8 is provided at one end of the regulating valve core 7 along the axial direction of the regulating valve core 7, and a second wiring area 9 is provided at the other end thereof;

[0064] The first wiring area 8 and the second wiring area 9 both include a positive conductive sheet 12, a negative conductive sheet 13, an anode 3 conductive sheet and a cathode 4 conductive sheet, and four plug-in slots 16 are provided in the first wiring area 8 and the second wiring area 9; the cross section of each of the plug-in slots 16 is a T-shaped structure, and the structures of the positive conductive sheet 12, the negative conductive sheet 13, the anode 3 conductive sheet and the cathode 4 conductive sheet are completely the same, and all include a bottom plate 17 and an abutment plate 18 connected in one piece, wherein the bottom plate 17 is a flat plate as a whole, and the abutment plate 18 is an arc-shaped or figure-eight-shaped structure as a whole, so as to form inclined guide surfaces 19 on both sides thereof;

[0065] The bottom surface of the abutment plate 18 is fitted with the top surface of the bottom plate 17 to achieve an integral connection, and the width of the bottom plate 17 is greater than the width of the abutment plate 18 to facilitate cooperation with the insertion slot 16;

[0066] During installation, the bottom plate 17 is inserted into the insertion groove 16, the abutment plate 18 protrudes out of the regulating valve core 7 along the radial direction of the regulating valve core 7, and the bottom plate 17 is tightly fitted with each surface of the insertion groove 16;

[0067] At the same time, two threading holes 20 are provided in the first wiring area 8 and the second wiring area 9, and connecting wires 21 are provided in the two threading holes 20. In the first wiring area 8, one connecting wire 21 connects the anode 3 conductive sheet with the positive conductive sheet 12, and the other connecting wire 21 connects the cathode 4 conductive sheet with the negative conductive sheet 13;

[0068] In the second wiring area 9 , one of the connecting wires 21 connects the anode 3 conductive sheet to the negative electrode conductive sheet 13 , and the other connecting wire 21 connects the cathode 4 conductive sheet to the positive electrode conductive sheet 12 .

[0069] Furthermore, a push-pull electromagnet 11 is also provided on the housing 6, and the telescopic rod of the push-pull electromagnet 11 is connected to the regulating valve core 7, so that the push-pull electromagnet 11 controls the movement of the regulating valve core 7 in the housing 6, thereby realizing the adjustment of the wiring state.

[0070] Further, four mounting holes 28 are provided on the housing 6, each of the mounting holes 28 is in two groups, i.e., two mounting holes 28 are provided in each group, and along the axis of the housing 6, the two groups of mounting holes 28 are respectively disposed on both sides of the housing 6, and the axis of each mounting hole 28 is perpendicular to the axis of the housing 6, i.e., each mounting hole 28 is arranged along the radial direction of the housing 6;

[0071] The two mounting holes 28 in the same group are arranged along the axis of the housing 6; each mounting hole 28 is connected to the cavity on the housing 6, and an elastic joint 10 is arranged in each mounting hole 28;

[0072] The elastic joint 10 includes a shell 101, and a connecting thread is provided on the outer circumferential surface of the shell 101, so as to be threadedly connected to the mounting hole 28 through the connecting thread; the shell 101 is a cylindrical structure as a whole, one end of which is completely open, and the other end is provided with a stepped hole. When installing, the end provided with the sleeve hole is inserted into the mounting hole 28, and a conductive rod 102 is slidably provided in the shell 101, and one end of the conductive rod 102 passes through the stepped hole and is inserted into the cavity of the shell 6;

[0073] The open end of the housing 101 is also threadedly connected to a sealing cover, and the sealing cover is provided with a plug hole coaxial with the stepped hole, and the other end of the conductive rod 102 extends through the plug hole to the outside of the housing 101 and is used to connect to an external electrical device;

[0074] A return spring 103 is also provided in the housing 101, and an extrusion ring 104 is integrally connected to the conductive rod 102, and both ends of the return spring 103 are tightly fitted with the sealing cover and the extrusion ring 104 respectively;

[0075] The setting of the return spring 103 can ensure that the conductive rod 102 has a certain elasticity and callback space. On the one hand, it can ensure the close fit between the conductive rod 102 and each conductive sheet, thereby ensuring the reliability and stability of the circuit conduction; on the other hand, a moderate rebound amount can avoid hard contact between the conductive rod 102 and the regulating valve core 7, thereby protecting various components and extending the service life of the equipment.

[0076] It should be noted that the four elastic joints 10 provided on the housing 6 all have fixed connection objects, see Figure 7 , two of the elastic joints 10 located on the same side of the shell 6 are numbered A and B respectively, and the two elastic joints 10 on the other side are numbered C and D, wherein the elastic joint 10 numbered A is connected to the positive electrode of the power source 1, the elastic joint 10 numbered B is connected to the negative electrode of the power source 1, the elastic joint 10 numbered C is connected to the anode 3, and the elastic joint 10 numbered D is connected to the cathode 4;

[0077] It should be noted that the above connection method is only a reference, and the connection can also be changed, but the change in the connection method must ensure that the electrode reversal function can be achieved;

[0078] The descaling device further comprises a controller 5, the controller 5 comprises an industrial computer and a PLC, the industrial computer is communicatively connected to the PLC, and the PLC is electrically connected to the power supply 1, the air compressor 23, the circulating pump 25 and the push-pull electromagnet 11 respectively;

[0079] When in use, in addition to connecting the power supply 1, the anode 3 and the cathode 4 in the above manner, during forward electrolysis, the circuit switching module is in the initial state, at which time the various terminals are connected through the first wiring area 8, that is, Figure 7 As shown, the positive electrode conductive sheet 12 is electrically connected to the elastic joint 10 connected to the positive electrode of the power source 1, and the negative electrode conductive sheet 13 is electrically connected to the elastic joint 10 connected to the negative electrode of the power source 1. At this time, the elastic joint 10 connected to the anode 3 is electrically connected to the conductive sheet of the anode 3, and the elastic joint 10 connected to the cathode 4 is electrically connected to the conductive sheet of the cathode 4. Since the positive electrode conductive sheet 12 is conductive with the conductive sheet of the anode 3 in the first wiring area 8, the positive electrode of the power source 1 is conductive with the anode 3, and similarly, the negative electrode of the power source 1 is conductive with the cathode 4;

[0080] When the wiring state needs to be adjusted, the push-pull electromagnet 11 is used to control the sliding of the regulating valve core 7, and the conductive sheets of the first wiring area 8 are gradually separated from the contact with the elastic joints 10, and the conductive sheets of the second wiring area 9 are respectively in contact with the conductive rods 102 of the elastic joints 10 to achieve conduction. Since in the second wiring area 9, the conductive sheet of the anode 3 is connected to the negative conductive sheet 13, and the conductive sheet of the cathode 4 is connected to the positive conductive sheet 12, when the various lines are connected through the second wiring area 9, the positive electrode of the power supply 1 is connected to the cathode 4, and the negative electrode of the power supply 1 is connected to the anode 3, thereby realizing the reverse connection of the circuit and reversing the connection state of the anode 3 and the cathode 4 with the power supply 1;

[0081] When the connection state needs to be switched again, the push-pull electromagnet 11 is closed, and under the action of its own spring, the push-pull electromagnet 11 will reset, thereby driving the regulating valve core 7 to reset;

[0082] Compared with the prior art, the circuit switching module of the above structure is simple in structure and easy to operate, which reduces the hardware cost of the equipment and simplifies the control program;

[0083] Secondly, the present application realizes the switching of the circuit by adjusting the movement of the valve core 7, and its simple structural design can effectively improve the stability and reliability of the equipment operation.

[0084] Furthermore, the housing 6 and the shell 101 can be made of an insulator such as bakelite, and the outer surface of the conductive rod 102 can also be covered with an insulating shell, and the insulating shell is made of an insulator such as bakelite;

[0085] The above insulation treatment can prevent the entire circuit switching module from becoming a conductor, which can reduce the heat generation of the equipment and energy consumption on the one hand, and ensure the stable operation of the equipment on the other hand;

[0086] Correspondingly, the present application also discloses a wastewater treatment device, which includes several groups of electrolytic oxidation treatment devices as described above. When in use, each group of devices operates independently of each other, and the operation process includes water intake, forward electrolysis, reverse electrolysis, aeration, drainage and other processes. The advantages of the above-mentioned groups of devices being able to operate periodically are: on the one hand, multiple groups of device systems are independently operated in parallel to ensure continuous water intake and discharge; on the other hand, it can ensure that the cathode surface of high-calcium wastewater is always in a state of less scale or no scale during the treatment process, and the system does not need to be shut down to clean the dirt, which does not affect the operation of the system, thereby ensuring the electrolytic oxidation operation efficiency of the entire wastewater treatment device.

[0087] Implementation Method 2

[0088] Reference Figure 8 As another optional embodiment of the present application, this embodiment discloses a descaling method based on the aforementioned electrolytic oxidation treatment device, comprising the following steps:

[0089] S1, conduct the circuit through the circuit switching module to perform forward electrolysis;

[0090] First, connect the circuit to assemble the entire system;

[0091] Then, the circuit is turned on through the first wiring area, at which time the positive electrode of the power supply is connected to the anode, and the negative electrode of the power supply is connected to the cathode, thereby achieving forward electrolysis;

[0092] It should be noted that the forward electrolysis time is t1 = 5-10h, and the current density is 100-600A / m 2 At the same time, the circulation pump can be started synchronously before the forward electrolysis to keep the wastewater circulating in the reactor.

[0093] S2, reverse the wiring state through the circuit switching module to perform reverse electrolysis;

[0094] When it is determined that the dirt attached to the cathode needs to be removed, the controller starts the electromagnet to work, the push-pull electromagnet controls the sliding of the regulating valve core, the conductive sheets in the first wiring area will gradually separate from the elastic joints, and the conductive sheets in the second wiring area will gradually be electrically connected to the elastic joints;

[0095] Thus, the circuit connection mode is reversed and reverse electrolysis is achieved. The reverse electrolysis time t2 = 3-30s, the current density is 1-6A / m 2

[0096] S3, start the aeration module to perform aeration and descaling treatment on the anode and cathode;

[0097] When reverse electrolysis is performed, the air compressor and the circulation pump are started by the controller, and the air compressor delivers high-pressure air to the aeration pipe, and finally enters the reactor from the exhaust hole. The high-speed air will flush the cathode and the anode, thereby washing away the softened dirt, effectively improving the descaling effect;

[0098] At the same time, the circulating pump drives the wastewater to circulate. While discharging the dirt, the flowing wastewater will also flush the anode and cathode, further separating the dirt and improving the dirt separation effect;

[0099] The aeration descaling treatment time is 1-2h. During the water circulation process, the water circulation velocity in the reactor is 5-20m / h, and the aeration intensity is 5-15L / m 2 ·s;

[0100] S4, detecting the voltage rise value ΔU of the reactor, if ΔU is greater than 0.5V, the dirt cleaning is unqualified, otherwise it is determined that the dirt cleaning is qualified;

[0101] After the aeration and descaling treatment is completed, the voltage in the reactor is detected after the system has been running stably for a period of time. When the voltage rise value ΔU≤0.5V, it is determined that the dirt on the electrode surface does not affect the operation of the system and the system can continue to operate normally.

[0102] When the voltage value increases △U>0.5V, it indicates that the dirt cleaning on the electrode surface is unqualified;

[0103] S5. If the dirt cleaning is unqualified, start the aeration module for secondary aeration until it is qualified, otherwise stop descaling.

[0104] S51, detecting the pH of the wastewater, if the pH is ≥ 2, adding acid to the reactor until the pH of the wastewater in the reactor is < 2; if the pH is < 2, no acid needs to be added;

[0105] If it is judged that the dirt removal is unqualified, the secondary aeration program is started. First, the pH of the wastewater is tested. If the pH is ≥ 2, an acid solution, such as hydrochloric acid, is added to the reactor to adjust the acidity of the wastewater in the reactor until the pH of the wastewater in the reactor is < 2;

[0106] S52, start the aeration module to perform secondary aeration on the anode and cathode, where the aeration intensity of the secondary aeration is 5-15L / m 2 ·s;

[0107] After the acid solution is adjusted, start the air compressor again to perform secondary aeration on the anode and cathode. The aeration intensity of the secondary aeration is 5-15L / m 2 ·s;

[0108] S53, start the circulation pump, and at the same time control the residence time of the wastewater in the reactor to be 1-10 minutes.

[0109] Start the circulation pump while starting the air compressor, and control the residence time of the wastewater in the reactor to be 1-10 minutes;

[0110] Compared with the prior art, the descaling device described in the present application generates a large amount of OH near the interface between the cathode and water during the forward electrolysis process of treating wastewater. - Due to the attraction of electrostatic force, calcium and magnesium ions in the water migrate to the cathode, and scaling substances such as calcium carbonate, magnesium carbonate, and magnesium hydroxide are generated on the cathode surface. Since the present application changes the electrode connection mode, that is, the cathode is connected to the positive pole of the power supply, and the anode is connected to the negative pole of the power supply, after the electrode switching, the original anode will operate as the cathode, and the original cathode will operate as the anode, which changes the acid-base environment near the electrode surface, destroys the scaling conditions, and makes the scaling substances easy to peel off from the electrode surface. At the same time, the cathode surface is flushed by aeration, and the adhesion of the dirt is weakened, which further accelerates the stripping of the dirt, effectively improves the dissolution and separation effect of the dirt, and then dissolves and disappears in an acidic environment, thereby achieving the purpose of efficient scale removal.

[0111] Compared with the prior art, firstly, after the electrode is reversed, the scale substances generated in large quantities on the original cathode surface can be quickly peeled off and can be fully dissolved and then disappear, so the descaling is thorough and efficient;

[0112] Secondly, the present application can realize the descaling operation by changing the connection mode of the electrodes, and at the same time, the electrolytic oxidation treatment of the wastewater can still be realized during the descaling process, that is, the entire descaling and wastewater treatment can be carried out simultaneously, and there is no need to stop the machine to remove the dirt, which effectively improves the production efficiency;

[0113] Finally, the whole device has a simple structure, and the above functions can be achieved through circuit switching modules, aeration modules, and circulation pumps, reducing equipment investment costs.

[0114] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An electrolytic oxidation treatment device with a descaling function, characterized in that: comprising a power supply (1); A reactor (2), wherein the reactor (2) is provided with an anode (3) and a cathode (4); A circuit switching module, wherein an input end of the circuit switching module is electrically connected to the power source (1), the anode (3) and the cathode (4) are electrically connected to output ends of the circuit switching module respectively, and the circuit switching module is used to reverse the connection state between the anode (3) and the cathode (4) and the power source (1); an aeration module, wherein the aeration module is arranged in the reactor (2); A controller (5), wherein the controller (5) is electrically connected to the power source (1), the circuit switching module and the aeration module respectively.

2. The electrolytic oxidation treatment device with descaling function according to claim 1, characterized in that: The circuit switching module comprises a housing (6), a regulating valve core (7) is slidably arranged in the housing (6), a first wiring area (8) and a second wiring area (9) having opposite wiring states are arranged on the regulating valve core (7), and a plurality of elastic joints (10) are also arranged on the housing (6), one end of each of the elastic joints (10) is respectively connected to the positive pole of the power supply (1), the negative pole of the power supply (1), the anode (3) and the cathode (4), and the other end thereof is electrically connected to the first wiring area (8) or the second wiring area (9); the housing (6) is also provided with a push-pull electromagnet (11) connected to the regulating valve core (7).

3. The electrolytic oxidation treatment device with descaling function according to claim 2, characterized in that: The first wiring area (8) and the second wiring area (9) are both provided with a positive electrode conductive sheet (12), a negative electrode conductive sheet (13), an anode (3) conductive sheet and a cathode (4) conductive sheet. The positive electrode conductive sheet (12), the negative electrode conductive sheet (13), the anode (3) conductive sheet and the cathode (4) conductive sheet correspond to the elastic joints (10) respectively. The anode (3) conductive sheet in the first wiring area (8) is electrically connected to the positive electrode conductive sheet (12), and the cathode (4) conductive sheet is electrically connected to the negative electrode conductive sheet (13); the anode (3) conductive sheet in the second wiring area (9) is electrically connected to the negative electrode conductive sheet (13), and the cathode (4) conductive sheet is electrically connected to the positive electrode conductive sheet (12).

4. The electrolytic oxidation treatment device with descaling function according to claim 3, characterized in that: The first wiring area (8) and the second wiring area (9) are both provided with a plurality of T-shaped plug-in slots (16); the positive electrode conductive sheet (12), the negative electrode conductive sheet (13), the anode (3) conductive sheet and the cathode (4) conductive sheet all include a bottom plate (17) and an abutment plate (18) which are connected in one piece; the bottom plate (17) is plug-connected to the plug-in slots (16); and guide surfaces (19) are obliquely provided at both ends of the abutment plate (18) along the moving direction of the regulating valve core (7).

5. The electrolytic oxidation treatment device with descaling function according to any one of claim 4, characterized in that: At least two wire threading holes (20) are provided in the first wiring area (8) and the second wiring area (9) on the regulating valve core (7), and a connecting wire (21) is provided in each of the wire threading holes (20).

6. The electrolytic oxidation treatment device with descaling function according to claim 2, characterized in that: The elastic joint (10) comprises an outer shell (101) and a conductive rod (102) slidably arranged in the outer shell (101), and the outer shell (101) is connected to the housing (6); a return spring (103) is also arranged in the outer shell (101), and an extrusion ring (104) is arranged on the conductive rod (102), and the return spring (103) abuts against the outer shell (101) and the extrusion ring (104) respectively.

7. The electrolytic oxidation treatment device with descaling function according to claim 1, characterized in that: The aeration module comprises an aeration pipe (22) and an air compressor (23); the aeration pipe (22) is arranged at the bottom of the reactor (2); the inlet end of the aeration pipe (22) is connected to the air compressor (23); and a plurality of exhaust holes (24) are evenly arranged on the aeration pipe (22).

8. The electrolytic oxidation treatment device with descaling function according to claim 1, characterized in that: The descaling device further comprises a circulation pump (25), the inlet end of the circulation pump (25) being connected to the reactor (2) via a water suction pipe (26), and the outlet end of the circulation pump (25) being connected to the reactor (2) via a water delivery pipe (27).

9. A descaling method for an electrolytic oxidation treatment device with a descaling function according to any one of claims 1 to 8, characterized in that: The following steps are involved: The circuit is turned on by the circuit switching module to perform forward electrolysis to treat the wastewater; Reverse the wiring state through the circuit switching module to perform reverse electrolysis; Start the aeration module and circulation pump to perform aeration and descaling treatment on the anode and cathode; Detect the voltage rise value ΔU of the reactor. If ΔU is greater than 0.5V, the dirt cleaning is unqualified, otherwise it is determined that the dirt cleaning is qualified; if the dirt cleaning is qualified, stop descaling and continue forward electrolysis; If the dirt cleaning is unsatisfactory, start the aeration module and the circulation pump for secondary aeration until it is qualified, otherwise stop descaling.

10. The descaling method according to claim 9, characterized in that: The secondary aeration comprises the following steps: Detect the pH of the wastewater. If the pH is ≥ 2, add acid to the reactor until the pH of the wastewater in the reactor is < 2. If the pH is < 2, no acid needs to be added. Start the aeration module to perform secondary aeration on the anode and cathode, where the aeration intensity of the secondary aeration is 5-15L / m 2 ·s Start the circulation pump and control the residence time of the wastewater in the reactor to be 1-10 minutes.

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