Sewage treatment skid-mounted device using microbubble technology

Abstract

The invention discloses a sewage treatment skid-mounted device using a microbubble technology, and relates to the technical field of sewage treatment.The sewage treatment skid-mounted device comprises a supporting unit and a filtering unit, the supporting unit comprises a base, supporting arms and a supporting rod, the supporting arms are arranged on the two sides of the base, and the supporting rod is arranged between the two supporting arms; the filtering unit comprises a sewage pipe, a filtering barrel, a driving part, an end cover, a scraper and a filtering net, the two sides of the sewage pipe penetrate into the filtering barrel, the driving part is arranged on the side edge of the filtering barrel, and the scraper is coaxially matched with the filtering net. The sewage treatment skid-mounted device has the beneficial effects that sewage about to enter the sewage treatment skid-mounted device is preliminarily filtered, the frequency of manual intervention in the sewage treatment process is reduced, and faults of the sewage treatment device are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to a skid-mounted sewage treatment device using microbubble technology. Background Art

[0002] At present, the pretreatment technologies for oilfield sewage mainly include processes such as oil-water separation, coagulation sedimentation, flotation, and filtration. Among them, the filtration technology is the main means to remove suspended solids, and its removal rate can reach more than 90%. According to different filtration media, the filtration technology can be divided into types such as grid filtration, microfiltration, membrane filtration, and deep filtration.

[0003] In the field of oilfield sewage treatment, there are many limitations in the existing technologies. Although the gravity separation oil removal technology has a large treatment capacity and low operating costs, it has a large floor area, high capital investment, poor treatment effect on emulsified oil, and a long sewage retention time. The flotation separation oil and suspended solids removal technology can improve the oil removal efficiency, but it needs to add flotation agents or coagulants and is prone to produce floating scum. The filtration technology has good effluent quality, but high operating costs, weak adaptability to load changes, easy to clog, and due to the limitation of the filter media particle size, it is impossible to further improve the filtration accuracy and efficiency. The sewage treatment process of the skid-mounted treatment station is difficult to adapt to the working conditions, and there are problems such as unreasonable process flow design and imperfect supporting facilities.

[0004] In summary, there are still many deficiencies in the existing oilfield sewage treatment technologies in terms of treatment efficiency, adaptability, cost control, etc., and further optimization and improvement are needed. Therefore, it is necessary to use a skid-mounted sewage treatment device using microbubble technology to further treat the oilfield sewage. Before treating the sewage using the microbubble technology, it is necessary to preliminarily conduct rough filtration on the sewage. Summary of the Invention

[0005] In view of the problem that the floating objects need to be manually fished out by the filtration device in the above or existing technologies, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide a skid-mounted sewage treatment device using microbubble technology.

[0007] To solve the above technical problems, the present invention provides the following technical solution: A skid-mounted sewage treatment device using microbubble technology, which includes a microbubble generator, a microfluidic mixer, a sewage filtration tank, a circulation pump, an air filtration tank, a chemical filtration tank, a chemical pump, an instrument control system, and an air filter; the sewage filtration tank includes a support unit (100) and a filtration unit (200), the support unit includes a base, a support arm, and a support rod, the support arm is arranged on both sides of the base, and the support rod is arranged in the middle of the two support arms; the filtration unit includes a sewage pipe, a filtration barrel, a driving part, an end cover, a scraper, and a filter screen, the two sides of the sewage pipe penetrate into the interior of the filtration barrel, the driving part is arranged on the side of the filtration barrel, and the scraper and the filter screen are coaxially matched.

[0008] As a preferred embodiment of the sewage treatment skid using microbubble technology according to the present invention, it is characterized in that: the base includes a sewage tank, a particle tank and a vertical rod, the sewage tank and the particle tank are arranged at intervals, and the vertical rod is arranged inside the base.

[0009] As a preferred embodiment of the sewage treatment skid using microbubble technology according to the present invention, it is characterized in that: the support arm includes a hinge hole, and the hinge hole is arranged at the end of the support arm.

[0010] As a preferred embodiment of the sewage treatment skid using microbubble technology according to the present invention, it is characterized in that: the support rod includes a connecting sleeve, and the connecting sleeve is arranged in the middle of the support rod.

[0011] As a preferred embodiment of the sewage treatment skid using microbubble technology according to the present invention, it is characterized in that: the sewage pipe includes branch pipes, the branch pipes are respectively arranged on both sides of the sewage pipe, and discharge ports are arranged at the ends of the branch pipes.

[0012] As a preferred embodiment of the sewage treatment skid using microbubble technology according to the present invention, it is characterized in that: the filter barrel includes a convex block, a sewage discharge groove and a sludge discharge groove, the convex block is arranged on the side of the filter barrel, the sewage discharge groove and the sludge discharge groove are respectively arranged on both sides of the bottom of the filter barrel, and the convex block further includes an engaging gear arranged on its side.

[0013] As a preferred embodiment of the sewage treatment skid using microbubble technology according to the present invention, it is characterized in that: the driving part includes a driving shaft, the driving shaft penetrates through the driving part, a filter screen gear and a sludge scraping gear are respectively arranged at both ends of the driving shaft, and the filter screen gear and the sludge scraping gear are arranged in alignment.

[0014] As a preferred embodiment of the sewage treatment skid using microbubble technology according to the present invention, it is characterized in that: the end cover includes a fitting block and a through hole, the fitting block is arranged on the side of the end cover, and the through hole is arranged in the middle of the end cover.

[0015] As a preferred embodiment of the sewage treatment skid using microbubble technology according to the present invention, it is characterized in that: the scraper includes a driven gear arranged at its end, the driven gear includes a cam and an arc-shaped blade, the arc-shaped blade is arranged around the scraper, and the cam is arranged on the side of the driven gear.

[0016] As a preferred embodiment of the sewage treatment skid using microbubble technology according to the present invention, it is characterized in that: the filter screen includes a driving gear and a rotating screen, the rotating screen includes mesh holes arranged in an array on its side, and the driving gear is arranged on the side of the filter screen.

[0017] As a preferred embodiment of the sewage treatment skid using microbubble technology according to the present invention, the sewage treatment chemicals are pumped into the microfluidic mixer by the chemical pump and fully mixed with the sewage. The functions of various chemicals in the sewage are then jointly fed into the microbubble generator.

[0018] As a preferred embodiment of the sewage treatment skid using microbubble technology according to the present invention, a branch line is added at the inlet of the chemical pump. Under the condition of dirty sewage, it is used to connect clear water to periodically flush the microbubble generator through the chemical pump.

[0019] Advantages of the present invention: By introducing sewage into the coarse filtration device, the sewage is directly sprayed onto the filter screen. During the rotation of the filter screen, the accumulation of solid substances in the sewage is avoided, enabling the sewage filtration to continuously maintain a better state. The rotation direction of the scraper is opposite to that of the filter screen, and the stains on the filter screen are scraped out through the relative movement with the filter screen, ensuring the continuous and stable filtration of the filter screen. At the same time, when the scraper rotates, an intermittent pendulum motion is formed with the structure of the external support unit, which is beneficial to generating a swinging effect on the sewage pipeline and reducing the blockage effect caused by the attachment of stains. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a main structure diagram of the sewage coarse filtration device for the microbubble sewage treatment skid.

[0022] Figure 2 It is a side view of the main body of the sewage coarse filtration device for the microbubble sewage treatment skid.

[0023] Figure 3 It is a bottom view of the main body of the sewage coarse filtration device for the microbubble sewage treatment skid.

[0024] Figure 4 It is an internal cross-sectional view of the sewage coarse filtration device for the microbubble sewage treatment skid.

[0025] Figure 5 It is a schematic diagram of the filtration structure of the sewage coarse filtration device for the microbubble sewage treatment skid.

[0026] Figure 6 It is a schematic diagram of the movement structure of the sewage coarse filtration device for the microbubble sewage treatment skid.

[0027] Figure 7Explosion diagram of the filtration structure of the sewage rough filtration device for the microbubble sewage treatment skid-mounted unit.

[0028] Figure 8 Overall structure diagram of the sewage treatment for the microbubble sewage treatment skid-mounted unit.

[0029] Figure 9 Influence of different catalyst contents on COD removal for the microbubble sewage treatment skid-mounted unit.

[0030] Figure 10 Influence of different ozone flow rates on COD removal for the microbubble sewage treatment skid-mounted unit.

[0031] Figure 11 Graph of COD change over time under optimal conditions for the microbubble sewage treatment skid-mounted unit.

[0032] Figure 12 Comparison of sewage treatment situations for the microbubble sewage treatment skid-mounted unit. Detailed implementation manners

[0033] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the accompanying drawings of the specification.

[0034] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from this description. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0035] Secondly, the so-called "one embodiment" or "embodiment" herein refers to specific features, structures, or characteristics that can be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selectively exclusive embodiment from other embodiments.

[0036] Embodiment 1, referring to Figures 1 to 5 , which is the first embodiment of the present invention. This embodiment provides a sewage treatment skid-mounted unit using microbubble technology, which includes a microbubble generator, a microfluidic mixer, a sewage filtration tank, a circulation pump, an air filtration tank, a chemical filtration tank, a chemical pump, an instrument control system, and an air filter. The sewage filtration tank includes a support unit (100) and a filtration unit (200). The support unit 100 completes the support action, and the filtration unit 200 completes the preliminary filtration of the sewage.

[0037] This skid-mounted unit disperses gas into micron-sized bubbles in liquid through a microbubble generator, increasing the specific surface area of gas-liquid contact, enhancing the efficiency of gas-liquid reactions, shortening the reaction residence time, and can be used in applications such as oilfield sewage desulfurization, petrochemical sewage treatment, and other gas-liquid reactions. And parameters such as the specification size of the microbubble generator, the sewage inlet and outlet pipelines, and the flow rate of the circulation pump can be adjusted to meet the production load requirements of large throughputs on-site.

[0038] Specifically, the sewage treatment agent is pumped into the microfluidic mixer 102 by the agent pump 108 and fully mixed with the sewage. The functions of various agents in the sewage are then jointly introduced into the microbubble generator 101.

[0039] It should be noted that the material of the microbubble generator is the same as that of the pipeline and the sewage filtration tank, generally 304 or 316. In special cases where the corrosion requirement is high, special materials such as titanium alloy and Hastelloy can be selected. In some cases, non-metallic materials such as polytetrafluoroethylene and PEEK can be used.

[0040] Furthermore, an external circulation is provided in the sewage filtration tank 103, and the overall residence time of the sewage is adjusted by adjusting the flow rate of the external circulation pump. An anti-foaming spray device is added to the external circulation system of the sewage filtration tank to prevent a large amount of foam generated during sewage treatment from leaking into the atmosphere through the vent port and causing pollution.

[0041] The sewage buffer filtration is at atmospheric pressure (using air as the gas source). If only a consumable gas source is used, it can be made into a closed type. Pressure regulating and flow monitoring instruments are equipped on the skid-mounted pipeline, and the corresponding pressure can be adjusted according to the flow rate of the incoming water on-site to ensure the inlet pressure for the normal operation of the microbubble generator and ensure that the gas can be smoothly self-aspirated into the microbubble generator. The gas enters the system through self-aspiration, and there is no need to use an additional compressor to press it into the system, which can save some power consumption.

[0042] An emergency cut-off valve is provided on the sewage inlet pipeline, which can quickly cut off the incoming water when problems occur in the upstream and downstream devices of the user. A switch valve is provided on the inlet gas pipeline, which can quickly cut off the gas source when a failure occurs in the incoming water to prevent the sewage from flowing back into the gas pipeline.

[0043] Preferably, a branch line is added at the inlet of the agent pump (108). Under the condition of relatively dirty sewage, it is used to connect clean water to regularly flush the microbubble generator (101) through the agent pump (108).

[0044] This skid-mounted unit uses PLC for automatic control and can also be manually switched. The whole process parameters have alarms and interlocks, and the mobile phone can be used for remote monitoring, enabling unattended operation. This skid-mounted unit adopts an overall container skid-mounted mode, which is movable and convenient for transportation, and can meet the customized needs of some remote locations.

[0045] Specifically, the support unit 100 includes a base 101, a support arm 102, and a support rod 103. The support arms 102 are arranged on both sides of the base 101, and the support rod 103 is arranged in the middle of the two support arms 102. The filtering unit 200 includes a sewage pipe 201, a filtering barrel 202, a driving part 203, an end cover 204, a scraper 205, and a filter screen 206. Both sides of the sewage pipe 201 penetrate into the inside of the filtering barrel 202, the driving part 203 is arranged on the side of the filtering barrel 202, and the scraper 205 and the filter screen 206 are coaxially matched.

[0046] When in use, first connect the coarse filtering device with the sewage inlet pipe. At this time, the inside of the sewage inlet pipe is untreated sewage, which contains a large amount of particulate matter and impurities. If it directly enters the sewage treatment skid for sewage treatment, it will cause faults in the sewage treatment skid and affect sewage treatment and filtration.

[0047] Furthermore, a connecting sleeve structure is arranged in the middle of the support rod 103 and is sleeved and connected with the sewage pipe, so that the sewage pipe is fixed, reducing the shaking at the connection of the sewage pipes. The connection of the sewage pipes is made with an elastic pipe such as a rubber pipe. Therefore, when the sewage pipe produces a pendulum effect, the connection between the sewage pipes is still firm, ensuring the safety of the operation.

[0048] Preferably, the scraper 205 and the filter screen 206 are coaxially and slidably matched. The scraper 205 penetrates into the inside of the filter screen 206. When the scraper 205 and the filter screen 206 move, relative movement is generated, cleaning the substances carried by the sewage and at the same time cleaning the mesh holes of the filter screen 206 to ensure the stability of sewage filtration.

[0049] Preferably, the driving part 203 provides kinetic energy for the whole device, and the end cover 204 and the filtering barrel 202 form a barrel structure, ensuring the stable operation of the internal mechanical structure.

[0050] Example 2, referring to Figures 1 to 7 , which is the second embodiment of the present invention. The difference from the first embodiment is that the base 101 further includes a sewage tank 101a, a particle tank 101b, and a vertical rod 101c. The sewage tank 101a and the particle tank 101b are arranged at intervals, and the vertical rod 101c is arranged inside the base 101.

[0051] Preferably, the support arm 102 includes a hinge hole 102a provided at the end of the support arm 102. The support rod 103 includes a connecting sleeve 103a provided in the middle of the support rod 103. The sewage pipe 201 includes branch pipes 201a respectively provided on both sides of the sewage pipe 201. The end of the branch pipe 201a is provided with a discharge port 201a-1. The filter barrel 202 includes a convex block 202a, a sewage discharge groove 202b and a sludge discharge groove 202c. The convex block 202a is provided on the side of the filter barrel 202. The sewage discharge groove 202b and the sludge discharge groove 202c are respectively provided on both sides of the bottom of the filter barrel 202. The convex block 202a further includes a connecting gear 202a-1 provided on its side.

[0052] Preferably, the driving part 203 includes a driving shaft 203a passing through the driving part 203. Filter screen gears 203a-1 and sludge scraping gears 203a-2 are respectively provided at both ends of the driving shaft 203a, and the filter screen gears 203a-1 and the sludge scraping gears 203a-2 are arranged in alignment.

[0053] Furthermore, the end cover 204 includes a fitting block 204a and a through hole 204b. The fitting block 204a is provided on the side of the end cover 204. The through hole 204b is provided in the middle of the end cover 204. The scraper 205 includes a driven gear 205a provided at its end. The driven gear 205a includes a cam 205a-1 and an arc-shaped blade 205a-2. The arc-shaped blade 205a-2 is provided around the scraper 205. The cam 205a-1 is provided on the side of the driven gear 205a. The filter screen 206 includes a driving gear 206a and a rotating screen 206b. The rotating screen 206b includes mesh holes 206b-1 arranged in an array on its side. The driving gear 206a is provided on the side of the filter screen 206.

[0054] Specifically, the sewage tank 101a and the particle tank 101b are separated to collect dirt and sewage that has been roughly filtered. The vertical rod 101c contacts the cam 205a-1. When the cam 205a-1 rotates, it impacts the vertical rod 101c, causing the entire device to bounce, and forming a pendulum effect after falling back again, effectively preventing the blockage of sewage in the pipeline through the oscillation effect.

[0055] Further, the hinge hole 102a provides a moving space for the support rod 103, and the connecting sleeve 103a passes through the neck of the sewage pipe 201, restricting the displacement of the sewage pipe 201 in the vertical direction.

[0056] Preferably, through the conversion of the connection gear 202a-1, the filter screen gear 203a-1 obtains a torque with a rotation direction different from that of the sludge scraping gear 203a-2. Therefore, on the driving gear 206a and the driven gear 205a, the two obtain different rotation directions. Therefore, the relative movement between the scraper 205 and the filter screen 206 continues during rotation.

[0057] Preferably, the cam 205a-1 contacts the vertical rod 101c. When the cam 205a-1 runs to the protruding part, the cam 205a-1 impacts the vertical rod 101c, causing the entire filtering device to produce a flying effect. After falling back, it continuously knocks. Therefore, from a distance, the filtering device produces a movement effect similar to that of a pendulum.

[0058] Therefore, in summary, in the present invention, sewage is introduced into the coarse filtering device, and the sewage is directly sprayed on the filter screen. During the rotation of the filter screen, the accumulation of solid substances in the sewage is avoided, so that the sewage filtration continuously maintains a better state. The rotation direction of the scraper is opposite to that of the filter screen, and the stains on the filter screen are scraped out through the relative movement with the filter screen, ensuring the continuous and stable filtration of the filter screen. At the same time, when the scraper part rotates, it forms an intermittent pendulum movement with the structure of the external support unit, which is beneficial to producing a swinging effect on the sewage pipeline and reducing the blockage effect caused by the attachment of stains.

[0059] Embodiment 3, referring to Figures 8 to 11 , which is the third embodiment of the present invention. On the basis of the first two embodiments, it provides a sewage treatment skid using microbubble technology. Before using microbubble treatment, preliminary filtration needs to be carried out. Then, through a microbubble generator, gas is dispersed into micron-sized bubbles in the liquid (the rising speed of bubbles with a diameter of 10 μm in water is 3 mm / min), improving the specific surface area of gas-liquid contact, strengthening the gas-liquid reaction efficiency, and shortening the reaction residence time; the entire skid can meet the production load requirements of large throughput on-site by adjusting parameters such as the specification size of the microbubble generator, the sewage inlet and outlet pipelines, and the flow rate of the circulation pump.

[0060] Specifically, for the sewage treatment skid using microbubble technology, as Figure 8 shown, the user's sewage enters this skid through flange connection, passes through a pressure regulating valve, and is fully mixed with the supporting chemicals in a microfluidic mixer and then enters the microbubble generator. The gas source of the microbubble generator of this skid uses air, which enters the microbubble generator after passing through an air filter and an air filtration tank, forming micron-sized bubbles in the generator, improving the specific surface area of gas-liquid contact, strengthening the gas-liquid reaction efficiency, and shortening the reaction residence time; the gas-liquid mixed fluid enters the sewage filtration tank. After ensuring a certain residence time, the sewage exits the filtration tank and enters the downstream device.

[0061] Furthermore, the microbubble technology is adopted to reduce the COD of chemical industrial wastewater, improve the utilization rate of ozone in industrial wastewater and reduce the energy consumption of wastewater treatment devices. By sorting out the relevant data on the catalyst dosage as Figure 9 shown: When the ozone flow rate is constant, the increase in the catalyst dosage will have a certain effect on the overall removal effect of COD in the wastewater. It is found through calculation in the first 60 minutes that when the catalyst dosage is increased from 10% to 15%, for every 1% increase in the catalyst dosage, 0.18 more COD can be removed per minute; when it is increased from 15% to 20%, for every 1% increase in the catalyst dosage, 0.07 more COD can be removed per minute. When the catalyst dosage is further increased from 15%, the COD removal efficiency is greatly reduced. This is because the catalyst is laid flat at the bottom of the reaction tank and the contact area with the wastewater is limited. Continuously increasing the catalyst dosage will not expand the effective contact area between the catalyst and the wastewater. However, too little catalyst dosage will also lead to poor reaction effect and reduced COD removal efficiency. Therefore, it is best to select a catalyst with a dosage of 15%.

[0062] Preferably, by sorting out the relevant data on the ozone flow rate as Figure 10 shown: The catalyst dosage is 15%, the maximum production rate of the ozone generator is 30 g / h, and the ozone density is 2.1 g / L (gas). After calculation, the maximum flow rate of the ozone generator is 240 mL / min. Under the condition that the catalyst dosage is 15%, it is found that the increase in ozone content will have a certain beneficial effect on the removal of COD in the wastewater. Especially within the first 60 minutes, the increase in the catalyst and ozone content can significantly reduce the COD of the wastewater. This is because most of the organic substances in the wastewater will be oxidized by ozone. Especially, the higher the ozone content, the stronger the initial oxidation efficiency. However, as the organic substances in the wastewater gradually decrease, most of the ozone will escape into the air because it is insoluble in water.

[0063] Furthermore, through multiple groups of experiments, the optimal reaction conditions are determined as the catalyst dosage of 15% and the ozone flow rate of 240 mL / min. The results of extending the reaction time are as Figure 11 shown: The COD content drops significantly within the first 60 minutes of the reaction, and the subsequent COD removal efficiency gradually slows down. Especially after 180 minutes, the COD gradually fluctuates around 50 mg / L and is extremely difficult to decrease. This is because the content of organic substances in the wastewater has decreased significantly, and a large amount of ozone will directly escape into the air because it is insoluble in water. Generally, the COD is reduced from the initial 164 mg / L to about 50 mg / L.

[0064] In the present invention, in a project of removing sulfur by aeration of oilfield sewage, the initial S2- content in the wastewater is 3 mg / L, the O content is 0.2 - 0.3 mg / L, and the Fe2+ / Fe3+ content is 0.2 - 0.3 mg / L. In order to explore the variation law of the S2- content in the wastewater after microbubble treatment, the S2- content is tested every 5 minutes. To verify the advantages of microbubble-treated wastewater, the raw water is left standing in the air as a control group. The colorimetric tubes for testing the S2- content under different conditions are taken from Figure 12 As can be seen from Figure 12 , the colors of the colorimetric tubes of the raw wastewater did not change significantly, and the colors were all dark blue. This indicates that when the raw wastewater is left standing in the air, the S2- content does not decrease significantly within 30 minutes. However, the color of the colorimetric tube of the microbubble-treated wastewater gradually fades with time and is basically colorless at 30 - 35 min. This shows that the S2- content in the microbubble-treated wastewater decreases significantly within 30 minutes.

[0065] Table 1 shows the variation diagrams of ion concentrations in the raw wastewater and the microbubble-treated water over time

[0066]

[0067] Therefore, this experiment verifies the advantages of the microbubble reaction device in reducing the S2- content.

[0068] To sum up, the oilfield sewage first passes through a filter to remove suspended solids, then enters the microfluidic mixing unit through a switching valve and a flow control valve, mixes with a bactericide, then enters the microbubble generator, and finally enters the sewage filter tank. By adding a circulation pump for circulating aeration, the aeration desulfurization time is regulated. Air enters the microbubble generator through the primary filter and the filter tank respectively; the bactericide is pumped into the microfluidic mixer by a bactericide pump for effective mixing with the oilfield sewage; the sewage filter tank supplies water to the polymer skid through liquid level control.

[0069] Traditional oilfield sewage desulfurization uses a packed desulfurization tower for aeration + physical adsorption superposition for desulfurization, and it is necessary to soak and backwash regularly with a cleaning agent. A large amount of cleaning sewage is generated each time of cleaning and needs to be transported out for treatment. This aeration desulfurization skid-mounted device, as a "portable" (movable) water treatment system, quickly removes sulfur through a self-priming microbubble generator, reducing the sulfur content from 2 mg / L to 0 mg / L, effectively solving problems such as excessive sulfur content in on-site sewage and long water pretreatment time. The treated water is used as the inlet water for the polymer dispersion and ripening skid. At a concentration of 0.2%, the viscosity of the system during liquid preparation increases from 38 mPa·s to 54 mPa·s, with a viscosity increase of 42%. The liquid preparation is uniform, clear and transparent, without fish eyes.

[0070] Importantly, the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A sewage treatment skid using microbubble technology, characterized by: Including, micro bubble generator, micro flow field mixer, air filter, circulation pump, air filter tank, pharmaceutical filter tank, pharmaceutical pump, instrument control system, and sewage filter tank; The sewage filter tank comprises a support unit (100) and a filter unit (200), wherein the support unit (100) comprises a base (101), a support arm (102) and a support rod (103), wherein the support arm (102) is arranged on both sides of the base (101), and the support rod (103) is arranged in the middle of the two support arms (102); and, The filtering unit (200) comprises a sewage pipe (201), a filter barrel (202), a driving unit (203), an end cover (204), a scraper (205) and a filter screen (206); both sides of the sewage pipe (201) penetrate into the interior of the filter barrel (202); the driving unit (203) is arranged on the side of the filter barrel (202); and the scraper (205) and the filter screen (206) are coaxially matched.

2. The sewage treatment skid using microbubble technology as claimed in claim 1, characterized in that: The base (101) comprises a sewage trough (101a), a particle trough (101b) and a vertical rod (101c); the sewage trough (101a) and the particle trough (101b) are arranged at intervals, and the vertical rod (101c) is arranged on the inner side of the base (101); The support arm (102) comprises a hinge hole (102a), and the hinge hole (102a) is arranged at the end of the support arm (102).

3. The sewage treatment skid using microbubble technology as claimed in claim 2, characterized in that: The support rod (103) comprises a connecting sleeve (103a), and the connecting sleeve (103a) is arranged in the middle of the support rod (103); The sewage pipe (201) comprises a branch pipe (201a), wherein the branch pipe (201a) is respectively arranged on both sides of the sewage pipe (201), and a discharge outlet (201a-1) is arranged at the end of the branch pipe (201a).

4. The sewage treatment skid using microbubble technology as claimed in claim 3, characterized in that: The filter barrel (202) comprises a protrusion (202a), a sewage trough (202b) and a mud trough (202c); the protrusion (202a) is arranged on the side of the filter barrel (202); the sewage trough (202b) and the mud trough (202c) are respectively arranged on two sides of the bottom of the filter barrel (202); the protrusion (202a) also comprises a connecting gear (202a-1) arranged on the side thereof.

5. The sewage treatment skid using microbubble technology as claimed in claim 4, characterized in that: The driving part (203) comprises a driving shaft (203a), the driving shaft (203a) is arranged to pass through the driving part (203), and a filter gear (203a-1) and a mud scraping gear (203a-2) are respectively arranged at both ends of the driving shaft (203a), and the filter gear (203a-1) and the mud scraping gear (203a-2) are arranged in a symmetrical manner.

6. The sewage treatment skid using microbubble technology as claimed in claim 5, characterized in that: The end cover (204) comprises a matching block (204a) and an access hole (204b); the matching block (204a) is arranged on the side of the end cover (204), and the access hole (204b) is arranged in the middle of the end cover (204).

7. The sewage treatment skid using microbubble technology as claimed in claim 6, characterized in that: The scraper (205) includes a driven gear (205a) arranged at its end, and the driven gear (205a) includes a cam (205a-1) and an arc-shaped blade (205a-2), the arc-shaped blade (205a-2) is arranged around the scraper (205), and the cam (205a-1) is arranged on the side of the driven gear (205a).

8. The sewage treatment skid using microbubble technology as claimed in claim 7, characterized in that: The filter screen (206) comprises a driving gear (206a) and a rotating screen (206b), wherein the rotating screen (206b) comprises mesh holes (206b-1) arranged in an array on its side, and the driving gear (206a) is arranged on the side of the filter screen (206).

9. The sewage treatment skid using microbubble technology as claimed in claim 8, characterized in that: The sewage treatment reagents are pumped into the micro-flow field mixer through the reagent pump and fully mixed with the sewage. Various reagents act on the sewage and then enter the micro-bubble generator together.

10. The sewage treatment skid using microbubble technology as claimed in claim 9, characterized in that: A branch line is added at the inlet of the chemical pump, which is used to connect clean water to regularly flush the microbubble generator through the chemical pump when the sewage is dirty.

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