Sewage treatment method, device and control equipment

Abstract

According to the oil field sewage treatment device, floating oil and large-particle precipitates in oil field sewage are subjected to standing layering by arranging the precipitation chamber and the floating oil chamber, the layering time is controlled by arranging the control device, and heavy metal ions are separated for the first time by introducing ozone during layering; after the sewage is thoroughly layered by the timing device and the control device, the layered sewage enters the electric flocculation chamber for electric flocculation by guiding out the floating oil layer and filtering the large particle layer, and the sewage stays in the electric flocculation space by introducing ozone gas and stirring at the same time; electric flocculation is carried out for sufficient time and space, so that small stain particles in the sewage are separated, and secondary heavy metal ion separation is carried out.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and specifically to a sewage treatment method, device and control equipment. Background Art

[0002] The existing oilfield wastewater contains a large amount of oil stains, heavy metal ions, large-size particles, soil blocks, sand and other impurities; the current electro-flocculation technology is the main technology for treating wastewater. The reaction principle of electro-flocculation is to use aluminum, iron and other metals as anodes. Under the action of direct current, the anodes are corroded to produce A l, Fe ions, after a series of hydrolysis, polymerization and ferrous oxidation processes, develop into various hydroxyl complexes, polynuclear hydroxyl complexes and even hydroxides, so that the colloidal impurities and suspended impurities in the wastewater are condensed and precipitated and separated. At present, the removal of heavy metal ions in sewage is mainly carried out by the fusion of ozone and micro-nano bubbles in water to remove heavy metal ions and oil pollution. The invention patent with publication number CN118666373A discloses a highly emulsified sewage treatment device for oil and gas fields; an annular electrode is arranged in the electro-flocculation cabin, and a cyclone tube is arranged on the wall of the electro-flocculation cabin along the tangential direction. The sewage entering the electro-flocculation cabin through the cyclone tube is subjected to cyclone flotation separation in the electro-flocculation cabin, and then the sewage can be better swirl and electro-flocculated in the annular space between two adjacent annular electrodes. The invention patent with publication number CN118183 The invention patent 952A discloses a high-voltage pulse electric flocculation sewage treatment equipment, which introduces sewage into a guide channel with multiple openings, sets the bottom of the conical guide plate located on the inner side into a soft hollow cone that is larger at the top and smaller at the bottom and open at the top, and sets a sewage outlet on the soft cone; when in use, a rod fixed on the soft cone is used to drive the soft cone to deform, and most of the precipitated flocs are lifted up while changing the position of the outlet; a sewage suction channel is set in the rod to intermittently pump out the deposited flocs; but the sewage electro-flocculation treatment in the prior art has the following problems: first, the contact time and contact area between the electro-flocculation and sewage in the existing sewage treatment method are insufficient; second, the stratification of the oil layer and the large particle impurity layer in the oilfield sewage is not thorough enough, which often leads to residual oil layers and large particles after the sewage is cleaned.

[0003] (I) Technical Problems to be Solved Based on the above technical problems, the present invention provides a sewage treatment method, device and control equipment.

[0004] (II) Technical solution

[0005] A sewage treatment device comprises a sewage treatment box, wherein the sewage treatment box comprises a water inlet pipe, a sedimentation chamber, a water flow channel, an oil floating chamber, an electric flocculation chamber I, an electric flocculation chamber II, and a water outlet pipe; one end of the water inlet pipe is connected to a sewage source, and the other end of the water inlet pipe is connected to the sedimentation chamber, the sedimentation chamber is arranged at the bottom of the sewage treatment box, and the width of the sedimentation chamber is the same as the width of the sewage treatment box.

[0006] Furthermore, an electrocoagulation chamber I and an electrocoagulation chamber II are arranged on the upper part of the sedimentation chamber, a side wall I of the electrocoagulation chamber I and the electrocoagulation chamber II are both the side walls of the sewage treatment tank, the front and rear side walls of the electrocoagulation chamber I and the electrocoagulation chamber II are both the front and rear walls of the sewage treatment tank, the other side wall II of the electrocoagulation chamber I and the electrocoagulation chamber II are arranged inside the sewage treatment tank and are arranged opposite to each other, the electrocoagulation chamber I and the electrocoagulation chamber II are both provided with an upper wall and a bottom wall, the two bottom walls are both arranged at the upper end of the sedimentation chamber, and the chambers of the electrocoagulation chambers I-II are surrounded by six walls and are all placed inside the sewage treatment tank.

[0007] Furthermore, a water flow channel is provided between the electro-flocculation chamber I and the electro-flocculation chamber II, the width of the water flow channel is the same as the distance between the side wall II of the electro-flocculation chamber I and the side wall II of the electro-flocculation chamber II, and an aeration device is provided in the water flow channel.

[0008] Furthermore, the aeration device includes an aeration box, an aeration pipe I and an aeration pipe II. The interior of the aeration box is filled with ozone gas. A main pipe is provided inside the aeration box. A main pipe valve is provided on the main pipe. The main pipe is connected to a diversion pipe through the main pipe valve. The diversion pipe is connected to multiple gas pipes. The multiple gas pipes are connected to multiple air outlets. The air outlets are upward toward the floating oil chamber at the upper part of the sewage treatment tank.

[0009] Furthermore, aeration pipe I and aeration pipe II are provided with aeration pipe valve I and aeration pipe valve II, one end of aeration pipe I is connected to the aeration box, the other end of aeration pipe I is connected to the interior of electric flocculation chamber I through a water flow channel, and is connected to the left side wall II of electric flocculation chamber I, one end of aeration pipe II is connected to the aeration box, the other end of aeration pipe II is connected to the interior of electric flocculation chamber II through a water flow channel, and is connected to the right side wall II of electric flocculation chamber II.

[0010] Furthermore, both the electro-flocculation chamber I and the electro-flocculation chamber II are provided with a stirring device and an electro-flocculation plate. Two electro-flocculation plates are provided. The electro-flocculation plates I-II are arranged in the electro-flocculation chamber. The electro-flocculation plate I is arranged inside the front wall of the electro-flocculation chamber, and the electro-flocculation plate II is arranged inside the rear wall of the electro-flocculation chamber. An electro-flocculation space is formed between the electro-flocculation plate I and the electro-flocculation plate II and the left and right side walls of the electro-flocculation chamber. The electro-flocculation plates I-II are connected to an external circuit, and the external circuit is controlled by a control device.

[0011] Furthermore, the electrocoagulation plates I-II are all in a shape where the upper and lower surfaces are inwardly concave and the left and right sides are arc-shaped.

[0012] Furthermore, the stirring device is arranged in the electric flocculation space, and the stirring device comprises N stirring driving rods, each stirring driving rod is connected to the driving device, and a plurality of stirring blades are connected to the stirring driving rod.

[0013] Furthermore, a polluted particle collecting device is provided on the upper wall of electro flocculation chamber I and electro flocculation chamber II, and the polluted particle collecting device includes a plurality of arc-shaped collecting chambers, and the plurality of arc-shaped collecting chambers are fixedly connected to the lower ends of electro flocculation chambers I-II, the interior of the arc-shaped collecting chamber is a cavity, and a plurality of particle collecting holes are provided at one end of the arc-shaped collecting chamber facing the electro flocculation space.

[0014] Furthermore, aeration pipe III and aeration pipe IV are arranged on both sides of the outside of the sewage treatment tank. Aeration pipe III is connected with side wall I of electric flocculation chamber I to enter electric flocculation chamber I, and aeration pipe IV is connected with side wall II of electric flocculation chamber II to enter electric flocculation chamber II. In electric flocculation chamber I, aeration pipe III and aeration pipe I are arranged opposite to each other, and in electric flocculation chamber II, aeration pipe IV and aeration pipe II are arranged opposite to each other.

[0015] Furthermore, a sliding hole is provided on the side wall I of the electro-flocculation chamber I and the electro-flocculation chamber II on one side of the sewage treatment tank, and a sealing plate is slidably connected in the sliding hole. The length of the sealing plate is the same as the upper wall and lower wall of the electro-flocculation chamber I and the electro-flocculation chamber II.

[0016] Furthermore, a water inlet is arranged on the lower wall of the electro-flocculation chamber I and the electro-flocculation chamber II, a water inlet valve is arranged on the water inlet, the other end of the water inlet is connected to the sedimentation chamber, and a filter is arranged on the water inlet.

[0017] Furthermore, the water outlet pipe is connected to the oil floating chamber, a partition is arranged between the oil floating chamber and the water flow channel, a water outlet is arranged on the partition, and a water valve is arranged on the water outlet.

[0018] Furthermore, it also includes a sewage treatment control device, including a control device, a data detection system, a timing system, and an information transmission system; the data detection system includes a water purity detection device, an oil layer concentration detection device, and an impurity particle concentration detection device.

[0019] Furthermore, the control device includes an aeration device control device, a valve control device, a stirring device control device, an electric flocculation plate control device, a sealing plate control device, and an inlet and outlet water control device.

[0020] Furthermore, a water purity collection device is arranged in the sedimentation chamber, the floating oil chamber and the electro-flocculation chambers I-II.

[0021] Furthermore, the oil layer concentration collection device is arranged in the floating oil chamber, and the impurity particle concentration collection device is arranged in the sedimentation chamber.

[0022] Furthermore, it also includes a sewage treatment method, including the following steps; step 1: control the water inlet of the water inlet pipe through the control device, pass the sewage into the sedimentation chamber, and pass the sewage into the floating oil chamber through the water flow channel. Initially, the sewage stratification time is set to T1 in the timing system, and the time enters the control device through the information transmission system. The control device controls the water inlet valve to be in a closed state and the water valve to be in an open state during the stratification time, so that the sewage can pass through the floating oil chamber.

[0023] Step 2: After the sewage passes through the water flow channel and fills the sedimentation chamber, the floating oil chamber and the water flow channel, the control device controls the aeration device to discharge ozone through multiple gas pipes to multiple outlets to granulate the heavy metal ions in the sewage and separate the sewage.

[0024] Step 3: After the aeration device has worked for T2 time, the control device controls the aeration device to close and continue sewage stratification. After the stratification time reaches T1, the water valve is closed, and the water purity detection device detects the water purity in the sedimentation chamber and the floating oil chamber, and the oil layer concentration detection device and the impurity particle concentration detection device respectively detect the oil concentration and the number of large particle impurities in the floating oil chamber and the sedimentation chamber.

[0025] Step 4. When the detection reaches the qualified value, the floating oil layer in the floating oil chamber is first discharged through the outlet pipe, and then the water inlet valve is controlled by the control device to be opened. Due to the presence of the filter, only sewage can enter the electric flocculation chamber. After the sewage enters, the control device controls the aeration pipes Ⅰ-Ⅳ to be ventilated, and controls the electric flocculation plates Ⅰ-Ⅱ to be energized, and controls the stirring device to stir, and at the same time, the flocculation separation of tiny particles in the sewage and the ozone ventilation secondary separation of metal ions are carried out.

[0026] Step 5: After a certain period of time, slide the sealing plate into the electro-flocculation chamber to seal the arc-shaped collecting chamber on the upper wall of the electro-flocculation chamber to prevent the separated particles from entering the water again.

[0027] (III) Beneficial effects

[0028] The present invention arranges a sedimentation chamber and an oil floating chamber to statically stratify the oil floating and large particle sediment in the oilfield sewage, and arranges a control device to control the stratification time, and during the stratification, introduces ozone to perform the first separation of heavy metal ions, and after the sewage is thoroughly stratified by the timing device and the control device, the stratified sewage enters the electro-flocculation chamber for electro-flocculation by leading out the oil floating layer and filtering the large particle layer, and at the same time, the sewage is allowed to stay in the electro-flocculation space by introducing ozone gas and stirring, and the electro-flocculation is performed for sufficient time and space to separate the small stain particles in the sewage and perform secondary heavy metal ion separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Attached Figure 1 Schematic diagram of sewage treatment plant.

[0030] Attached Figure 2 Schematic diagram of the aeration box.

[0031] Attached Figure 3 Schematic diagram of electrocoagulation chambers I-II.

[0032] Attached Figure 4 Schematic diagram of the electrocoagulation space.

[0033] Attached Figure 5 Schematic diagram of the polluted particle collection device.

[0034] 1-water inlet pipe, 2-sedimentation chamber, 3-electroflocculation chamber I, 4-electroflocculation chamber II, 5-floating oil chamber, 6-water inlet, 7-water outlet, 8-water flow channel, 9-aeration box, 10-main pipe valve, 11-main pipe, 12-diversion pipe, 13-gas pipe, 14-aeration pipe I, 15-aeration pipe II, 16-aeration pipes III-IV, 17-side wall I, 18-side wall II, 19-front side wall, 20-rear side wall, 21-sealing plate, 22-schematic diagram of electroflocculation plates I-II, 23-stirring device, 24-upper wall, 25-polluted particle collection device. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] A sewage treatment device comprises a sewage treatment box, wherein the sewage treatment box comprises an inlet pipe 1, a sedimentation chamber 2, a water flow channel 8, a floating oil chamber 5, an electric flocculation chamber I (3), an electric flocculation chamber II (4), and an outlet pipe; one end of the inlet pipe 1 is connected to a sewage source, and the other end of the inlet pipe 1 is connected to the sedimentation chamber (2); the sedimentation chamber (2) is arranged at the bottom of the sewage treatment box, the width of the sedimentation chamber is the same as the width of the sewage treatment box, the upper part of the sedimentation chamber (2) is provided with an electric flocculation chamber I (3) and an electric flocculation chamber II (4); one side wall I (17) of the electric flocculation chamber I (3) and the electric flocculation chamber II (4) are both side walls of the sewage treatment box, and the front and rear side walls of the electric flocculation chamber I (3) and the electric flocculation chamber II (4) are both sewage. The front and rear walls of the treatment box, the other side wall II (18) of the electro-flocculation chamber I (3) and the electro-flocculation chamber II (4) are arranged inside the sewage treatment box and are arranged opposite to each other. The electro-flocculation chamber I and the electro-flocculation chamber II are both provided with an upper wall (24) and a bottom wall. The two bottom walls are both arranged at the upper end of the sedimentation chamber. The chambers of the electro-flocculation chambers I-II are surrounded by six walls and are all placed inside the sewage treatment box. A water flow channel (8) is arranged between the electro-flocculation chamber I (3) and the electro-flocculation chamber II (4). The width of the water flow channel (8) is the same as the distance between the side wall II (18) of the electro-flocculation chamber I and the side wall II (18) of the electro-flocculation chamber II. An aeration device is arranged in the water flow channel. The aeration device includes an aeration box (9), an aeration pipe I (14) and an aeration pipe. The aeration box (9) is filled with ozone gas. A main pipe (11) is arranged inside the aeration box. A main pipe valve (10) is arranged on the main pipe (11). The main pipe (11) is connected to a shunt pipe (12) through the main pipe valve (10). The shunt pipe (12) is connected to a plurality of gas pipes (13). The plurality of gas pipes (13) are connected to a plurality of gas outlets. The gas outlets face upward toward the oil floating chamber at the top of the sewage treatment tank. An aeration pipe valve I and an aeration pipe valve II are arranged on the aeration pipe I (14) and the aeration pipe II (15). One end of the aeration pipe I is connected to the aeration box (9). The other end of the aeration pipe I is connected to the inside of the electro-flocculation chamber I through a water flow channel and is connected to the left side wall II (18) of the electro-flocculation chamber I (3). One end of the pipe II is connected to the aeration box, and the other end of the aeration pipe II is connected to the inside of the electro-flocculation chamber II (4) through the water flow channel and connected to the right side wall II (18) of the electro-flocculation chamber II. The electro-flocculation chamber I and the electro-flocculation chamber II are both provided with a stirring device (23) and an electro-flocculation plate (22). Two electro-flocculation plates (22) are provided. The electro-flocculation plates I-II are provided in the electro-flocculation chamber. The electro-flocculation plate I (22) is provided inside the front wall of the electro-flocculation chamber, and the electro-flocculation plate II (22) is provided inside the rear wall of the electro-flocculation chamber. An electro-flocculation space is formed between the electro-flocculation plate I and the electro-flocculation plate II and the left and right side walls of the electro-flocculation chamber. The electro-flocculation plates I-II are both connected to an external circuit, and the external circuit is controlled by a control device.The electro-flocculation plates I-II are both concave in the upper and lower surfaces and have arc-shaped left and right sides. A stirring device (23) is arranged in the electro-flocculation space. The stirring device includes N stirring drive rods, each stirring drive rod is connected to the driving device, and a plurality of stirring plates are connected to the stirring drive rod. The upper wall (24) of the electro-flocculation chamber I (3) and the electro-flocculation chamber II (4) is provided with a polluted particle collecting device (25). The polluted particle collecting device includes a plurality of arc-shaped collecting cavities, and the plurality of arc-shaped collecting cavities are fixedly connected to the lower ends of the electro-flocculation chambers I-II. The interior of the arc-shaped collecting cavity is a cavity, and a plurality of particle collecting holes are arranged at one end of the arc-shaped collecting cavity facing the electro-flocculation space. Aeration pipes III (16) and aeration pipes IV (16) are arranged on both sides of the outside of the sewage treatment tank. Aeration pipes III are connected to the side wall I (17) of the electro-flocculation chamber I (3) to enter the electro-flocculation chamber. The aeration pipe IV (16) is connected to the side wall I (17) of the electro-flocculation chamber II (4) to enter the electro-flocculation chamber II. In the electro-flocculation chamber I, the aeration pipe III and the aeration pipe I are arranged opposite to each other. In the electro-flocculation chamber II, the aeration pipe IV and the aeration pipe II are arranged opposite to each other. The electro-flocculation chamber I (3) and the electro-flocculation chamber II (4) are provided with a sliding hole on the side wall I of the sewage treatment tank. A sealing plate (21) is slidably connected in the sliding hole. The sealing plate The length of (21) is the same as the upper wall and lower wall of the electro-flocculation chamber I and the electro-flocculation chamber II. The lower wall of the electro-flocculation chamber I and the electro-flocculation chamber II is provided with a water inlet (6), a water inlet valve is provided on the water inlet, the other end of the water inlet is connected to the sedimentation chamber, a filter is provided on the water inlet, the water outlet pipe is connected to the floating oil chamber, a partition is provided between the floating oil chamber and the water flow channel, a water inlet is provided on the partition, and a water inlet valve is provided on the water inlet.

[0037] A sewage treatment method comprises the following steps: Step 1: controlling the water inlet of a water inlet pipe through a control device, passing the sewage into a sedimentation chamber, and passing the sewage into an oil floating chamber through a water flow channel, initially setting the sewage stratification time T1 in a timing system, and entering the time into the control device through an information transmission system, the control device controls the water inlet valve to be in a closed state and the water valve to be in an open state during the stratification time, and the sewage can pass through the oil floating chamber.

[0038] Step 2: After the sewage passes through the water flow channel and fills the sedimentation chamber, the floating oil chamber and the water flow channel, the control device controls the aeration device to discharge ozone through multiple gas pipes to multiple outlets to granulate the heavy metal ions in the sewage and separate the sewage.

[0039] Step 3: After the aeration device has worked for T2 time, the control device controls the aeration device to close and continue sewage stratification. After the stratification time reaches T1, the water valve is closed, and the water purity detection device detects the water purity in the sedimentation chamber and the floating oil chamber, and the oil layer concentration detection device and the impurity particle concentration detection device respectively detect the oil concentration and the number of large particle impurities in the floating oil chamber and the sedimentation chamber.

[0040] Step 4. When the detection reaches the qualified value, the floating oil layer in the floating oil chamber is first discharged through the outlet pipe, and then the water inlet valve is controlled by the control device to be opened. Due to the presence of the filter, only sewage can enter the electric flocculation chamber. After the sewage enters, the control device controls the aeration pipes Ⅰ-Ⅳ to be ventilated, and controls the electric flocculation plates Ⅰ-Ⅱ to be energized, and controls the stirring device to stir, and at the same time, the flocculation separation of tiny particles in the sewage and the ozone ventilation secondary separation of metal ions are carried out.

[0041] Step 5: After a certain period of time, slide the sealing plate into the electro-flocculation chamber to seal the arc-shaped collecting chamber on the upper wall of the electro-flocculation chamber to prevent the separated particles from entering the water again.

Claims

1. A sewage treatment device, comprising a sewage treatment tank, the sewage treatment tank comprising an inlet pipe, a sedimentation chamber, a water flow channel, an oil floating chamber, an electric flocculation chamber I, an electric flocculation chamber II, and an outlet pipe; one end of the inlet pipe is connected to a sewage source, and the other end of the inlet pipe is connected to the sedimentation chamber, the sedimentation chamber is arranged at the bottom of the sewage treatment tank, the width of the sedimentation chamber is the same as the width of the sewage treatment tank, the upper part of the sedimentation chamber is provided with an electric flocculation chamber I and an electric flocculation chamber II, one side wall I of the electric flocculation chamber I and the electric flocculation chamber II are both the side walls of the sewage treatment tank, and the side walls of the electric flocculation chamber I and the electric flocculation chamber II are The front and rear side walls are both the front and rear walls of the sewage treatment tank. The other side wall II of the electro-flocculation chamber I and the electro-flocculation chamber II are arranged inside the sewage treatment tank and are arranged opposite to each other. The electro-flocculation chamber I and the electro-flocculation chamber II are both provided with an upper wall and a bottom wall. The two bottom walls are both arranged at the upper end of the sedimentation chamber. The chambers of the electro-flocculation chambers I-II are surrounded by six walls and are all placed inside the sewage treatment tank. A water flow channel is arranged between the electro-flocculation chamber I and the electro-flocculation chamber II. The width of the water flow channel is the same as the distance between the side wall II of the electro-flocculation chamber I and the side wall II of the electro-flocculation chamber II. An aeration device is arranged in the water flow channel.

2. The sewage treatment device according to claim 1, characterized in that: The aeration device includes an aeration box, an aeration pipe I and an aeration pipe II. The interior of the aeration box is filled with ozone gas. A main pipe is arranged inside the aeration box. A main pipe valve is arranged on the main pipe. The main pipe is connected to a diversion pipe through the main pipe valve. The diversion pipe is connected to multiple gas pipes. The multiple gas pipes are connected to multiple air outlets. The air outlets are upward toward the floating oil chamber at the upper part of the sewage treatment tank.

3. The sewage treatment device according to claim 2, characterized in that: Aeration pipe I and aeration pipe II are provided with an aeration pipe valve I and an aeration pipe valve II. One end of aeration pipe I is connected to an aeration box, and the other end of aeration pipe I is connected to the interior of electric flocculation chamber I through a water flow channel and is connected to the left side wall II of electric flocculation chamber I. One end of aeration pipe II is connected to an aeration box, and the other end of aeration pipe II is connected to the interior of electric flocculation chamber II through a water flow channel and is connected to the right side wall II of electric flocculation chamber II.

4. The sewage treatment device according to claim 3, characterized in that: Both the electro-flocculation chamber I and the electro-flocculation chamber II are provided with a stirring device and an electro-flocculation plate. There are two electro-flocculation plates, and the electro-flocculation plates I-II are arranged in the electro-flocculation chamber. The electro-flocculation plate I is arranged inside the front wall of the electro-flocculation chamber, and the electro-flocculation plate II is arranged inside the rear wall of the electro-flocculation chamber. An electro-flocculation space is formed between the electro-flocculation plate I and the electro-flocculation plate II and the left and right side walls of the electro-flocculation chamber. The electro-flocculation plates I-II are connected to an external circuit, and the external circuit is controlled by a control device.

5. The sewage treatment device according to claim 4, characterized in that: The upper and lower surfaces of the electro-flocculation plates I-II are both concave inward and the left and right sides are arc-shaped. The stirring device is arranged in the electro-flocculation space. The stirring device includes N stirring drive rods, each of which is connected to a driving device, and a plurality of stirring blades are connected to the stirring drive rod.

6. The sewage treatment device according to claim 5, characterized in that: A polluted particle collecting device is arranged on the upper wall of electro-flocculation chamber I and electro-flocculation chamber II, and the polluted particle collecting device comprises a plurality of arc-shaped collecting chambers, and the plurality of arc-shaped collecting chambers are fixedly connected to the lower ends of electro-flocculation chambers I-II, the interior of the arc-shaped collecting chamber is a cavity, and a plurality of particle collecting holes are arranged at one end of the arc-shaped collecting chamber facing the electro-flocculation space.

7. The sewage treatment device according to claim 6, characterized in that: Aeration pipe III and aeration pipe IV are arranged on both sides of the outside of the sewage treatment tank. Aeration pipe III is connected with side wall I of electric flocculation chamber I to enter electric flocculation chamber I, and aeration pipe IV is connected with side wall II of electric flocculation chamber II to enter electric flocculation chamber II. In electric flocculation chamber I, aeration pipe III and aeration pipe I are arranged opposite to each other, and in electric flocculation chamber II, aeration pipe IV and aeration pipe II are arranged opposite to each other.

8. The sewage treatment device according to claim 7, characterized in that: The electro-flocculation chambers I and II are provided with sliding holes on the side wall I on one side of the sewage treatment tank, and sealing plates are slidably connected in the sliding holes. The length of the sealing plates is the same as the upper and lower walls of the electro-flocculation chambers I and II. The lower walls of the electro-flocculation chambers I and II are provided with water inlets, and the water inlet valves are provided on the water inlets. The other end of the water inlet is connected to the sedimentation chamber, and a filter is provided on the water inlet. The water outlet pipe is connected to the floating oil chamber, and a partition is provided between the floating oil chamber and the water flow channel. The partition is provided with a water inlet, and the water inlet is provided with a water valve.

9. A sewage treatment control device for controlling a sewage treatment device based on any one of claims 1-8, comprising a control device, a data detection system, a timing system, and an information transmission system; the data detection system comprises a water purity detection device, an oil layer concentration detection device, and an impurity particle concentration detection device; the control device comprises an aeration device control device, a valve control device, a stirring device control device, an electric flocculation plate control device, a sealing plate control device, and an inlet and outlet water control device; a water purity collection device is arranged in a sedimentation chamber, an oil floating chamber, and electric flocculation chambers I-II; an oil layer concentration collection device is arranged in an oil floating chamber; and an impurity particle concentration collection device is arranged in a sedimentation chamber.

10. A sewage treatment method based on the sewage treatment device according to any one of claims 1 to 8, comprising the following steps: Step 1: Control the water inlet of the water inlet pipe through the control device, pass the sewage into the sedimentation chamber, and pass the sewage into the floating oil chamber through the water flow channel, initially set the sewage stratification time as T1 in the timing system, and enter the control device through the information transmission system, the control device controls the water inlet valve to be in a closed state and the water valve to be in an open state within the stratification time, so that the sewage can pass through the floating oil chamber; Step 2: After the sewage passes through the water flow channel and fills the sedimentation chamber, the floating oil chamber and the water flow channel, the control device controls the aeration device to discharge ozone through multiple gas pipes to multiple gas outlets to granulate the heavy metal ions in the sewage and separate the sewage; Step 3: After the aeration device has worked for T2 time, the control device controls the aeration device to be closed and the sewage stratification is continued. After the stratification time reaches T1, the water valve is closed, and the water purity detection device detects the water purity in the sedimentation chamber and the floating oil chamber, and the oil layer concentration detection device and the impurity particle concentration detection device respectively detect the oil concentration and the number of large particle impurities in the floating oil chamber and the sedimentation chamber; Step 4: When the test reaches the qualified value, the floating oil layer in the floating oil chamber is firstly discharged through the outlet pipe, and then the water inlet valve is controlled by the control device to be opened. Due to the existence of the filter, only sewage can enter the electric flocculation chamber. After the sewage enters, the control device controls the aeration pipes I-IV to ventilate, controls the electric flocculation plates I-II to be energized, and controls the stirring device to stir, and at the same time, the flocculation separation of tiny particles in the sewage and the ozone ventilation secondary separation of metal ions are performed; Step 5: After a certain period of time, slide the sealing plate into the electro-flocculation chamber to seal the arc-shaped collecting chamber on the upper wall of the electro-flocculation chamber to prevent the separated particles from entering the water again.

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