Efficient sewage coalescing scale removal device and method

Abstract

The present application relates to the technical field of ground engineering, and is a sewage efficient coalescing descaling device and method, which comprises a right descaling tank and a right descaling assembly arranged in the right descaling tank. The right descaling assembly comprises a support frame, upper support rods, lower support rods, upper pulleys, lower pulleys, filler rolls, winches and first filler belts in a belt structure. The support frame is installed in the right descaling tank, and a plurality of upper support rods are arranged at the upper part of the support frame in an interval from left to right. A plurality of upper pulleys are rotatably installed on the outer side of each upper support rod from front to back. The present application has a reasonable and compact structure. By fixed-point scaling, the automatic replacement of the fixed-point scaling filler belt is designed, so that the replacement of any filler belt can be realized without stopping production. The present application is convenient and flexible, reduces the difficulty of replacing the filler belt of the descaling tank, does not need manual lifting operation, saves the replacement time, improves the use efficiency of the sewage efficient coalescing descaling device, ensures the continuous and stable water quality to meet the standard, and solves the demand for liquid preparation water quality index.

Description

Technical Field

[0001] This invention relates to the field of ground engineering technology, and is a device and method for efficient coalescence and descaling of wastewater. Background Technology

[0002] With oilfield development, the high concentration of calcium and magnesium ions in produced water, coupled with poor water quality compatibility, leads to significant scaling and corrosion across the entire process from the surface to the formation, affecting equipment, pipelines, wellbores, and the formation itself. This results in a series of serious consequences, including increased maintenance costs, shortened equipment and pipeline lifespan, enormous system energy consumption, blockage in the near-wellbore zone of oil and water wells, and a substantial impact on reservoir recovery. Furthermore, the calcium and magnesium ion concentration in produced water used for fluid preparation must be below 100 mg / L.

[0003] Scale removal from produced water is crucial for ensuring the stable operation of the entire system and the continuous production and efficient development of the oilfield. With the development of descaling technology, a combination of aeration and active adsorption has emerged. The main descaling mechanism involves providing carbon dioxide through aeration, which to some extent promotes scale formation in unstable produced water. The system also incorporates easily adsorbed and precipitated packing material as "crystal nuclei," providing structural support. The packing material is periodically replaced based on the amount of scale adsorbed, thereby achieving the removal of calcium and magnesium ions and suspended solids.

[0004] Chinese patent document CN220665070U discloses a combined packing aeration module, which includes: a curtain-shaped biological rope, the curtain-shaped biological rope including a first fixing strip, a second fixing strip, and multiple individual biological ropes, the multiple individual biological ropes being fixed parallel and spaced between the first fixing strip and the second fixing strip, the curtain-shaped biological rope being fixed to a support, the support including a base and a top frame, multiple support rods being arranged between the base and the top frame, the first fixing strip being fixed to the base, the first fixing strip being fixed to the top frame; and an aeration assembly, the aeration assembly including an air supply pipe and an aeration pipe disposed on the base, the aeration pipe being provided with multiple aeration holes, one end of the air supply pipe being connected to the aeration pipe, and the other end of the air supply pipe extending from the top frame of the support.

[0005] Chinese patent document CN207566989U discloses a scale-reducing tank and a microbial treatment system, which includes: a tank body for containing produced water containing polymers; and an aeration unit disposed within the tank body for introducing air into the tank body to increase the dissolved oxygen content of the produced water, thereby causing calcium and magnesium ions dissolved in the produced water to precipitate. This scale-reducing tank and microbial treatment system employs aeration + active adsorption descaling technology.

[0006] However, the above-mentioned technologies have the following limitations: First, replacing the packing material is difficult, usually requiring the entire packing frame to be lifted out, and the packing material removed and replaced one by one, along with cleaning the scale off the frame. The replacement cycle is generally 7-10 days. Second, replacing the packing material based on experience or water quality testing makes it impossible to accurately determine the replacement cycle. Third, if calcium and magnesium ions exceed the standard, the descaling rate cannot meet expectations. Therefore, these technologies have significant drawbacks in terms of effectiveness, maintenance costs, and safety when used for targeted descaling. Summary of the Invention

[0007] This invention provides a wastewater efficient coalescence descaling device and method, which overcomes the shortcomings of the prior art and can effectively solve the problems of difficult packing replacement and failure to achieve the expected descaling rate in existing descaling devices.

[0008] One of the technical solutions of this invention is achieved through the following measures: a wastewater high-efficiency coalescence descaling device, comprising a right scale-reducing tank and a right scale-cleaning assembly disposed within the right scale-reducing tank. The right scale-cleaning assembly includes a support frame, an upper support rod, a lower support rod, an upper pulley, a lower pulley, a packing roll, a winch, and a first packing strip with a strip structure. A support frame is installed inside the right scale-reducing tank. Several upper support rods are spaced apart on the upper part of the support frame. Several upper pulleys are rotatably installed on the outer side of each upper support rod from front to back. Lower supports are provided on the lower part of the support frame corresponding to the positions between two adjacent upper support rods. The support rod has a lower pulley rotatably mounted on the outer side of the lower support rod corresponding to each upper pulley position. A packing roll corresponding to the upper pulley is rotatably mounted on the upper left side of the support frame. A winch is provided on the upper right side of the support frame. A first packing strip with its first end fixedly connected to the corresponding packing roll is wound around the outer side of each upper pulley on the far left. The second end of each first packing strip is alternately wrapped around the lower pulley and the upper pulley and then fixedly connected to the winch. At least one liquid inlet pipe is fixedly connected to the lower left side of the right scale tank at a time interval. At least one liquid outlet pipe is fixedly connected to the lower right side of the right scale tank at a time interval. The first packing belt includes a central rope, spacers, packing plates, and packing wire bundles. The first and second ends of the central rope are fixedly connected to the packing roll and the winch, respectively. Several spacers are evenly distributed along the length of the outer side of the central rope. An annular packing plate fitted on the outer side of the central rope is provided between each two adjacent spacers. Several packing wire bundles are evenly distributed along the circumference of each packing plate.

[0009] The following are further optimizations and / or improvements to one of the above-mentioned technical solutions: Both the first and second ends of the aforementioned central rope can be fixedly connected to a lifting ring, and both the outer side of the upper pulley and the outer side of the lower pulley are provided with annular grooves that are wider on the outside and narrower on the inside.

[0010] A feeding shaft can be fixedly installed on the upper left side of the aforementioned support frame. A packing roll is rotatably installed on the outer side of the feeding shaft corresponding to each upper pulley position. Several turns of spare packing tape are wound around the outer side of the packing roll. The first end of the spare packing tape is fixedly connected to the outer side of the packing roll, and the second end of the spare packing tape is detachably fixedly connected to the first end of the first packing tape. A damping plate is provided between the inner side of the packing roll and the outer side of the feeding shaft.

[0011] The aforementioned winch may include a take-up shaft, a take-up reel, a clutch, and a geared motor. A take-up shaft is fixedly installed on the upper right side of the support frame. A take-up reel is fitted on the outside of the take-up shaft corresponding to each filler roll position. A clutch is provided between the take-up reel and the take-up shaft. A geared motor is fixedly installed on the right side of the support frame. The output shaft end of the geared motor is connected to the end of the take-up shaft.

[0012] The aforementioned spare packing strip may include several second packing strips that are detachably and fixedly connected end to end. The first end of the second packing strip is detachably and fixedly connected to the first end of the first packing strip, and the last end of the second packing strip is detachably and fixedly connected to the outside of the packing roll.

[0013] The above may also include a control module, a force limiter installed between the reel and the take-up shaft, an electromagnetic brake installed between the right side of the support frame and the take-up shaft, and the force limiter, electromagnetic brake, clutch and geared motor are all connected to the control module.

[0014] The second technical solution of the present invention is achieved through the following measures: a method for efficient coalescence and descaling of wastewater, comprising the following steps: S1, in the process sequence, connect at least one high-efficiency wastewater coalescence and descaling device and one sludge scraping unit. The sludge scraping unit includes a sedimentation tank, a sludge scraper and a sludge discharge system. The sludge scraper is set at the top of the sedimentation tank to scrape off floating impurities in the water. The sludge discharge system is distributed at the bottom of the sedimentation tank to ensure that the impurities at the bottom are discharged in a timely manner. S2, raw water enters the right scale-reducing tank through the inlet pipeline, and the first packing belt adsorbs scale-forming substances in the raw water; S3, the suspended scale entering the slag scraping unit is scraped off by the slag scraper; S4. When the sludge thickness at the bottom of the settling tank is greater than or equal to the set thickness or the sludge discharge cycle is equal to the set sludge discharge cycle, the sludge discharge system starts to work.

[0015] The following are further optimizations and / or improvements to the second technical solution of the above invention: In step S1 above, there are two wastewater high-efficiency coalescence descaling devices, and calcium and magnesium ion monitors for collecting calcium and magnesium ion concentrations are installed on the effluent pipeline.

[0016] In step S2 above, when the concentration of calcium and magnesium ions in the effluent is greater than or equal to the first set concentration value and less than the second set concentration value, or when the replacement cycle of the first packing belt and the second packing belt is greater than or equal to the set replacement cycle, the reduction motor starts to work and pulls out the first packing belt or the second packing belt in the scale reduction tank. When the concentration of calcium and magnesium ions in the effluent is greater than or equal to the second set concentration value, descaling agent is added into the inlet pipeline through the dosing mechanism.

[0017] The aforementioned dosing mechanism includes a dosing pump, a connecting pipeline, and a dosing pipeline. The inlet of the dosing pump is fixedly connected to one end of the dosing pipeline, and the outlet of the dosing pump is fixedly connected to the liquid inlet pipeline via a connecting pipeline. The descaling agent includes a pH adjuster and a scale-forming agent.

[0018] This invention features a reasonable and compact structure. By targeting specific scaling points, it is designed to automatically replace the targeted scaling packing belt, enabling replacement of any packing belt without interrupting production. This is convenient and flexible, reducing the difficulty of replacing the packing belt in the scaling tank. It eliminates the need for manual hoisting operations, saving replacement time, improving the efficiency of the wastewater high-efficiency coalescence descaling device, ensuring implementation safety, saving more than 90% of labor costs, ensuring continuous and stable water quality compliance, and meeting the requirements for solution preparation water quality indicators. Attached Figure Description

[0019] Appendix Figure 1 These are schematic diagrams of the main structure of embodiments one to five of the present invention.

[0020] Appendix Figure 2 These are three-dimensional structural diagrams of embodiments one to five of the present invention.

[0021] Appendix Figure 3 This is a schematic diagram of the main sectional view of the support frame in embodiments one to five of the present invention.

[0022] Appendix Figure 4 This is a three-dimensional structural diagram of the upper pulley in embodiments one to five of the present invention.

[0023] Appendix Figure 5 This is a three-dimensional structural diagram of an aeration disc according to embodiments one to five of the present invention.

[0024] Appendix Figure 6 This is a top view schematic diagram of another aeration disc in Embodiments 1 to 5 of the present invention.

[0025] Appendix Figure 7 This is a partial cross-sectional view of the first packing strip in embodiments two to five of the present invention.

[0026] Appendix Figure 8 This is a top-view cross-sectional view of the first packing strip in embodiments two to five of the present invention.

[0027] Appendix Figure 9This is a schematic diagram of the left-side cross-sectional structure of the winch in Embodiment 5 of the present invention.

[0028] Appendix Figure 10 This is a schematic diagram of the circuit structure of Embodiment Six of the present invention.

[0029] Appendix Figure 11 These are schematic diagrams of the main cross-sectional structure of embodiments seven to nine of the present invention.

[0030] The codes in the attached diagram are as follows: 1 is the scale-reducing tank, 2 is the baffle plate, 3 is the left scale-reducing tank, 4 is the right scale-reducing tank, 5 is the left scale-removing component, 6 is the aeration disc, 7 is the support frame, 8 is the upper support rod, 9 is the lower support rod, 10 is the upper pulley, 11 is the lower pulley, 12 is the center rope, 13 is the spacer sleeve, 14 is the packing sheet, 15 is the packing filament bundle, 16 is the lifting ring, 17 is the annular wheel groove, 18 is the liquid inlet pipeline, 19 is the liquid outlet pipeline, 20 is the packing roll, 21 is the discharge shaft, 22 is the damping plate, 23 is the second packing belt, 24 is the receiving shaft, 25 is the recovery roll, 26 is the clutch, 27 is the geared motor, 28 is the electromagnetic brake, 29 is the sedimentation tank, 30 is the sludge scraper, and 31 is the sludge discharge pipeline. Detailed Implementation

[0031] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0032] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0033] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figure 1 , 2As shown in Figures 3 and 5, the efficient wastewater coalescence descaling device includes a right scale-reducing tank 4 and a right scale-cleaning assembly located within the right scale-reducing tank 4. The right scale-cleaning assembly includes a support frame 7, upper support rods 8, lower support rods 9, upper pulleys 10, lower pulleys 11, packing rolls 20, a winch, and a first packing strip with a strip structure. The support frame 7 is installed inside the right scale-reducing tank 4. Several upper support rods 8 are spaced apart on the upper part of the support frame 7. Several upper pulleys 10 are rotatably installed on the outer side of each upper support rod 8 from front to back. Lower support rods 9 are provided on the lower part of the support frame 7 corresponding to the positions between two adjacent upper support rods 8. Each upper pulley 10 is rotatably installed on the outer side of the support frame 7. Lower support rods 9 at position 0 are rotatably mounted with lower pulleys 11 on their outer sides. A packing roll 20 corresponding to the upper pulley 10 is rotatably mounted on the upper left side of support frame 7. A winch is provided on the upper right side of support frame 7. Each upper pulley 10 on the far left is wrapped with a first packing strip whose first end is fixedly connected to the corresponding packing roll 20. The second end of each first packing strip alternately passes around the lower pulley 11 and the upper pulley 10 in sequence and is fixedly connected to the winch. At least one liquid inlet pipe 18 is fixedly connected to the lower left side of the right scale tank 4 at intervals. At least one liquid outlet pipe 19 is fixedly connected to the lower right side of the right scale tank 4 at intervals.

[0034] Based on the descaling principle, aeration increases the carbon dioxide and oxygen content in the water, accelerating the self-scaling tendency of the extracted water. Scale is then precipitated in the extracted water. Therefore, an aeration disc 6 is installed in the right scale-reducing tank 4, with the aeration disc 6 located on the lower inner side of the right scale-reducing tank 4. A support frame 7 is installed in the right scale-reducing tank 4 above the aeration disc 6. Support columns are fixed at the four corners below the support frame 7, ensuring that the distance between the lower side of the support frame 7 and the bottom wall of the scale-reducing tank 1 is greater than 50mm, sufficient for installing the aeration disc 6. The aeration disc 6 can be installed on existing known pipe supports, such as the aeration section described in the scale-reducing tank and microbial treatment system published in Chinese patent document CN207566989U. The inlet branch pipes of the aeration section can be distributed in a ring array, and the aeration disc 6 can be installed facing downwards (air outlet downwards).

[0035] It can also be distributed in a matrix, as shown in the appendix. Figure 6 As shown, the aeration disc 6 can be installed facing upwards (air outlet upwards). The distance between the side of the support frame 7 and the side wall of the scale-reducing tank 1 facilitates the installation of the upper pulley 10. The support frame 7 and the support column are made of 316L stainless steel, so that sewage is less likely to form scale on the surface of the support frame 7 and the support column.

[0036] The wastewater high-efficiency coalescence descaling device also includes a scale-reducing tank 1, a left scale-removing component 5, and a right scale-removing component. The scale-reducing tank 1 is equipped with a partition 2, which divides the scale-reducing tank 1 into several groups of scale-reducing chambers arranged at intervals. The lower parts of the scale-reducing chambers are interconnected. Each group of scale-reducing chambers includes a left scale-reducing trough 3 and a right scale-reducing trough 4 arranged at intervals. The left scale-reducing trough 3 is equipped with a left scale-removing component 5 that has the same structure as the right scale-removing component and is symmetrically arranged. In this way, the lower part of the right scale-reducing trough 4 does not need to be equipped with an inlet pipe 18 and an outlet pipe 19. At least one inlet pipe 18 is fixedly connected at intervals on the left side of the lower part of the scale-reducing tank 1, and at least one outlet pipe 19 is fixedly connected at intervals on the right side of the lower part of the scale-reducing tank 1.

[0037] The support frame 7 has five upper support rods 8 spaced apart on the left and right sides, dividing the right scale-reducing tank 4 into six sections. The support frame 7 also has four lower support rods 9 at its lower part, dividing the right scale-reducing tank 4 into five sections. Each upper support rod 8 has ten upper pulleys 10 rotatably mounted on its outer side from front to back, dividing it into eleven equal parts. Similarly, each lower support rod 9 has ten lower pulleys 11 rotatably mounted on its outer side from front to back. There are also ten corresponding packing rolls 11. The upper pulleys 10 and lower pulleys 11 have the same structure and are both made of 316L stainless steel. 10 adopts a split structure, with both parts fitted onto the outside of the upper support rod 8 via clamps. Buckles are installed on both the front and rear sides of the upper pulley 10, and bolts are used to fix the buckles to the upper support rod 8 together. This can limit the movement of the upper pulley 10 and prevent it from moving back and forth. Alternatively, the upper pulley 10 can be rotatably mounted on the Ø10.5 open clamp support, and then the Ø10.5 open clamp support is fixedly mounted on the outside of the upper support rod 8. The front and rear sides of the Ø10.5 open clamp support are locked with M4 set screws to prevent the upper pulley 10 from moving back and forth.

[0038] Each first packing belt starts from the upper leftmost pulley 10 and goes down, then up through the lower outer side of the lower pulley 11, then down through the upper outer side of the upper pulley 10, and alternately passes through all the upper pulleys 10 and lower pulleys 11 in sequence. Finally, the first end and the second end of the first packing belt are located on both sides of the support frame 7, and 10 sets of first packing belts are installed in parallel.

[0039] A control valve is installed on the liquid inlet pipeline 18 to facilitate inspection and maintenance. In order to ensure that the scale is adsorbed at a fixed point and does not float and affect the downstream pipeline and equipment, a first packing belt with multiple stages (formed by alternatingly passing around all the upper pulleys 10 and lower pulleys 11) is designed to adsorb the scale, so as to achieve the purpose of fixed-point descaling after adsorption.

[0040] As attached Figure 2 , 3As shown in Figures 7 and 8, the first packing strip includes a central rope 12, spacers 13, packing plates 14, and packing wire bundles 15. The first and second ends of the central rope 12 are fixedly connected to the packing roll 20 and the winch, respectively. Several spacers 13 are evenly distributed along the length direction on the outer side of the central rope 12. An annular packing plate 14 fitted on the outer side of the central rope 12 is provided between each two adjacent spacers 13. Several packing wire bundles 15 are evenly distributed along the circumference of each packing plate 14.

[0041] Depending on the requirements, the center rope 12 is made of high-strength corrosion-resistant ropes such as 2mm diameter steel wire rope, high-strength polyethylene rope, and aramid rope. The spacer 13 can be made of nylon and can be 8cm long. The filler plate 14 includes a center ring, an inner ring, and an outer ring arranged from the inside to the outside. The center rope 12 passes through the center ring. Several inner connecting rods are evenly distributed around the circumference between the center ring and the inner ring. Several outer connecting rods are evenly distributed around the circumference between the inner ring and the outer ring. The filler filament bundle 15 is composed of several synthetic fiber filament bundles or several aldehyde-modified vinylon filaments. The filler filament bundle 15 can be wound or tied to the outer connecting rods or the inner connecting rods. The diameter of the synthetic fiber filament bundle is 0.07mm.

[0042] Based on the research on the influence of different contact angles, surface free energy, and surface roughness on the amount of scaling and calcium loss rate, and considering factors such as strength, salt resistance, corrosion resistance, and ease of replacement, the study shows that FRP non-metallic scaling materials are the most advantageous. Therefore, the material of packing sheet 14 is FRP (fiber reinforced plastic).

[0043] Each first packing strip is 40m long, with a strip spacing of 8cm, totaling 500 strips; the weight of packing strip 14 is 7g, so its own weight is 500*7=3.5kg; if it is covered with scale, it will weigh 14kg; a 2mm diameter steel wire rope is used, with a self-weight of 1kg, so the total weight is 15kg; with a safety factor of 2, the required tensile force is 2*15*9.8=294N, and the safety requirement is 5 times the tensile force, which is 1470N; the minimum breaking tensile force of the 2mm steel wire rope is ≥1800N, which is greater than the safety requirement, thus meeting the requirements.

[0044] Several spacers 13 are evenly distributed along the length of the outer side of the central rope 12. This allows the spacers 13 to be threaded through the central rope 12 during installation, ensuring consistent distance between adjacent packing plates 14. Compared to existing technologies that directly fix the packing filaments to the central rope by binding, this method is more convenient. Between each pair of adjacent spacers 13, there is an annular packing plate 14 fitted onto the outer side of the central rope 12. Each packing plate 14 has several packing filaments 15 evenly distributed along its circumference. The arrangement of the packing plates 14 facilitates the connection between the packing filaments 15 and the central rope 12, and also ensures that the packing filaments 15 are evenly distributed during use, preventing clumping and improving water distribution. The air distribution performance and easy film formation make it easier for scale in the wastewater to accumulate on the surface of the packing sheet 14; the first packing strip can also be a known technology, such as a combination packing of all-plastic sandwich vinylon aldehyde fiber, or all the first packing strips can be divided into two groups, with the two groups of first packing strips staggered left and right, and one set to the left of each upper support rod 8 and one set to the left of each lower support rod 9. The winding sequence of all the first packing strips is the same. In two adjacent first packing strips, the first packing strip in front starts winding from the upper pulley 10 on the leftmost upper support rod 8, and the first packing strip behind starts winding from the upper pulley 10 on the second upper support rod 8 from left to right. In this way, the two adjacent first packing strips are staggered left and right.

[0045] By designing an automatic replacement packing belt for fixed-point scaling, the packing belt can be replaced at any time without interrupting production. This is convenient and flexible, reduces the difficulty of replacing the packing belt in the scale-reducing tank 1, eliminates the need for manual hoisting operations, saves replacement time, improves the efficiency of the wastewater high-efficiency coalescence descaling device, ensures implementation safety, saves more than 90% of labor costs, ensures continuous and stable water quality compliance, and meets the requirements for solution preparation water quality indicators.

[0046] The above-mentioned high-efficiency coalescence descaling device for wastewater can be further optimized and / or improved according to actual needs: Example 2: As an optimization of the above examples, as shown in the appendix. Figure 3 , 4 As shown, the first and second ends of the central rope 12 are both fixedly connected to a hanging ring 16, and the outer side of the upper pulley 10 and the outer side of the lower pulley 11 are both provided with annular grooves 17 that are wider on the outside and narrower on the inside.

[0047] According to the requirements, the first and second ends of the central rope 12 are made of pressed aluminum sleeves to form rope buckles. Then, the lifting ring 16 is fixedly connected to the rope buckle. The lifting ring 16 is a known technology, such as an elliptical track buckle made of 316L material with an ultimate breaking tensile force ≥12000N. The wheel groove is an isosceles trapezoid with a wider outer side and a narrower inner side. The groove width is 14mm and the groove depth is 7mm. The groove can meet the requirement that the lifting ring 16 passes over the upper pulley 10 after moving with the central rope 12. The outer diameter of the upper pulley 10 is 50mm.

[0048] Example 3: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown in Figure 3, a feeding shaft 21 is fixedly installed on the upper left side of the support frame 7. A packing roll 20 is rotatably installed on the outer side of the feeding shaft 21 corresponding to each upper pulley 10 position. Several turns of spare packing tape are wound around the outer side of the packing roll 20. The first end of the spare packing tape is fixedly connected to the outer side of the packing roll 20, and the second end of the spare packing tape is detachably fixedly connected to the first end of the first packing tape. A damping plate 22 is provided between the inner side of the packing roll 20 and the outer side of the feeding shaft 21.

[0049] According to requirements, the second packing strip 23 has the same structure as the first packing strip. The discharge shaft 21 is made of steel pipe with a wall thickness of 3mm. Ten sets of packing rolls 20 are arranged at equal intervals. The width of the packing roll 20 is 0.2m. Adjacent packing rolls 20 are separated by limiting rings. 316L spherical bearings are installed between the two ends of the packing roll 20 and the discharge shaft 21. Ten spare packing strips connected end to end are wound around the outside of each packing roll 20, with a total length of 400m. The inner circumference of the packing roll 20 is 3.14 * 60 = 188.5mm. The diameter of the spare packing strip is 4mm. The length that a single layer can accommodate (one layer of packing roll 20) is 200 / 4 * 188.5 = 9.42m. The number of layers required for a total length of 400m is 400 / 9.42 = 43 layers. After winding 43 layers, the outer diameter of the packing roll 20 is 60 + 2*43*4=404mm; the inner diameter of the reel is Φ60mm, the outer diameter is Φ480mm, the effective width is 200mm, and the material of the packing roll 20 is 316L material; a friction damping plate 22 is provided between the inner side of the packing roll 20 and the outer side of the feeding shaft 21, which can reduce the rotation speed of the packing roll 20, thereby preventing the spare packing strip from being fed too quickly. The second end of the spare packing strip and the first end of the first packing strip are detachably fixedly connected by an existing known 316L material elliptical racetrack buckle.

[0050] Example 4: As an optimization of the above examples, as shown in the appendix. Figure 9 As shown, the winch includes a take-up shaft 24, a take-up roll 25, a clutch 26, and a geared motor 27. The take-up shaft 24 is fixedly installed on the upper right side of the support frame 7. A take-up roll 25 is fitted on the outside of the take-up shaft 24 corresponding to the position of each filler roll 20. A clutch 26 is provided between the take-up roll 25 and the take-up shaft 24. The geared motor 27 is fixedly installed on the right side of the support frame 7. The output shaft end of the geared motor 27 is connected to the end of the take-up shaft 24 for transmission.

[0051] The take-up shaft 24 has a diameter of 60mm, and the take-up roll 25 has a width of 200mm. The geared motor 27 can be installed in front of or behind the take-up shaft 24 as needed. The geared motor 27 can realize the winding and replacement of the second filler belt 23 and the first filler belt, improving the replacement efficiency. The clutch 26 is a known technology. The clutch 26 can realize the rotation of a single take-up roll 25, and can wind up and replace the second filler belt 23 and the first filler belt at the corresponding position as needed.

[0052] The geared motor 27 uses a 0.75kW three-phase asynchronous motor or a 24V DC brushless motor with a reduction ratio of 40:1-60:1 worm gear reducer. The output speed is 5-8 rpm. The output shaft of the reducer is connected to the end of the take-up shaft 24 through a coupling.

[0053] Example 5: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown in Figure 3, the spare packing strip includes several second packing strips 23 that are detachably and fixedly connected end to end. The first end of the second packing strip 23 is detachably and fixedly connected to the first end of the first packing strip, and the last end of the second packing strip 23 is detachably and fixedly connected to the outside of the packing roll 20.

[0054] The spare packing tape includes 10 second packing tapes 23 that are detachably and fixedly connected end to end. The diameter of the second packing tape 23 is 4mm and the length of the second packing tape 23 is 40 meters. The first end of the outermost second packing tape 23 of the packing roll 20 is detachably and fixedly connected to the first end of the first packing tape, the last end of the innermost second packing tape 23 of the packing roll 20 is connected to the packing roll 20, and two adjacent second packing tapes 23 are connected by elliptical racetrack buckles made of 316L material. This facilitates the periodic replacement of the packing tape.

[0055] Example 6: As an optimization of the above examples, as shown in the appendix Figure 10 As shown, it also includes a control module. A force limiter is installed between the reel 25 and the take-up shaft 24. An electromagnetic brake 28 is installed between the right side of the support frame 7 and the take-up shaft 24. The force limiter, electromagnetic brake 28, clutch 26 and geared motor 27 are all connected to the control module.

[0056] As required, calcium and magnesium ion monitors for collecting calcium and magnesium ion concentrations are installed on each of the outlet lines 19. These monitors are connected to a control module, which utilizes existing, well-known technology, such as a programmable logic controller (PLC). This setup allows for automatic replacement of the packing material based on conditions such as time, weight, and ion concentration during operation.

[0057] Clutch 26 is a DC24V electromagnetic clutch with a bore diameter of 60mm, torque ≥12N.m, and thickness ≤22mm; the reel 25 is fixedly connected to the outer hub of clutch 26 by bolts.

[0058] A force limiter or tension sensor is installed between the take-up reel 25 and the take-up shaft 24, with a set threshold of 500N. When the tension exceeds the set threshold, the clutch 26 operates, disconnecting the transmission between the take-up reel 25 and the take-up shaft 24. At the same time, the electromagnetic brake 28 is de-energized and self-locked. This prevents the take-up reel 25 from rotating in the opposite direction and slipping. After the fault is cleared, the electromagnetic brake 28 is energized and released, the clutch 26 stops operating, and the transmission connection between the take-up reel 25 and the take-up shaft 24 is restored. This improves the safety performance of the winch.

[0059] A conventional measuring wheel can be installed to the right of the rightmost upper pulley 10, or a rotary encoder can be installed on the side of the reel 25 to directly measure the reel length of the second packing belt 23 and the first packing belt. An intelligent digital display measuring controller is installed, and both the rotary encoder and the control module are connected to the intelligent digital display measuring controller. When the set length is input, the reel 25 stops rotating when the reel length of the second packing belt 23 and the first packing belt reaches the set length. In this embodiment, the set length is 40m, and the length of each second packing belt 23 and each first packing belt is 40m.

[0060] When the length rotated by the recovery roll 25 reaches 400m, the second packing strip 23 of the spare packing roll 20 is exhausted, and the old packing wound on the recovery roll 25 reaches its maximum. Manual replacement of the packing roll 20 and removal of the old packing from the recovery roll 25 are required: disconnect the second packing strip 23 connected to the packing roll 20, disconnect the second packing strip 23 connected to the recovery roll 25 (remove the beginning and end of the second packing strip 23); remove the waste packing from the outside of the recovery roll 25, and connect the beginning of the second packing strip 23 to the recovery roll 25; remove the packing roll 20, install a new packing roll 20, and connect the beginning of the outer packing strip of the new packing roll 20 to the end of the in-use second packing strip 23 using a 316L elliptical racetrack buckle.

[0061] Example 7: As attached Figures 1 to 11 As shown, the efficient wastewater flocculation and descaling method includes the following steps: S1, at least one high-efficiency wastewater coalescence and descaling device and one sludge scraping unit are connected in sequence according to the process order. The sludge scraping unit includes a settling tank 29, a sludge scraper 30 and a sludge discharge system. The sludge scraper 30 is set at the top of the settling tank 29 to scrape off floating impurities in the water. The sludge discharge system is distributed at the bottom of the settling tank 29 to ensure that the impurities at the bottom are discharged in time. S2, raw water enters the right scale-reducing tank 4 through the inlet pipeline 18, and the first packing belt adsorbs scale-forming substances in the raw water; S3, the suspended scale entering the scraping unit is scraped off by the scraper 30; S4. When the sludge thickness at the bottom of sedimentation tank 29 is greater than or equal to the set thickness or the sludge discharge cycle is equal to the set sludge discharge cycle, the sludge discharge system starts to work.

[0062] The sludge scraping unit is a known technology. It is installed after the high-efficiency coalescence and descaling device for wastewater. Depending on the water quality and quantity, the high-efficiency coalescence and descaling device for wastewater can be used in series or in parallel. Its main function is to scrape off floating impurities in the water. The sedimentation tank 29 is made of a material that is not prone to scaling, and can be made of steel lined with FRP or 316L stainless steel. The sludge scraper 30 can be a chain scraper or a traveling scraper, which has continuous sludge scraping function and speed regulation function, and can operate continuously for 24 hours. The outlet of the sedimentation tank 29 is located at the top.

[0063] The sludge removal system is evenly distributed at the bottom of the settling tank 29 and the bottom of the scale removal tank 1. Both the bottom of the settling tank 29 and the bottom of the scale removal tank 1 are equipped with sludge removal systems to ensure that large molecular scale and sludge impurities are discharged in a timely manner. Negative pressure sludge removal or mechanical sludge removal can be selected. The sludge removal system includes a sludge removal pipeline 31 that is connected to the bottom of the settling tank 29 and the bottom of the scale removal tank 1. The inlet of the sludge removal pipeline 31 is located 30-40 cm below the liquid surface. At the other end of the sludge removal pipeline 31, a vacuum pump, water jet, or sludge removal pump that provides sludge removal power is connected. This creates a negative pressure in the sludge removal pipeline 31. Under the action of pressure difference, the sediment at the bottom of the settling tank 29 and the bottom of the scale removal tank 1 is sucked into the sludge removal pipeline 31 through the sludge suction port and finally transported to the sludge treatment unit.

[0064] Limit probes are installed at the bottom of sedimentation tank 29 and scale removal tank 1. An electric valve is installed on the sludge discharge pipeline 31. The sludge height at the bottom of the online monitoring device is monitored. The vacuum pump, water jet, or sludge discharge pump, limit probes, and electric valves are all connected to the sludge discharge controller. The sludge discharge height is set to 5cm-30cm. When the sludge height reaches the discharge height, the electric valve opens, and then the vacuum pump, water jet, or sludge discharge pump starts working to perform sludge discharge. The sludge discharge time can be set to 10-15 minutes. After the operation time reaches the sludge discharge time, the operation stops, and then the electric valve closes. To ensure timely discharge of sediment and to prevent the formation of difficult-to-clean material due to excessive retention time, the sludge discharge interval should be set to 24 hours. That is, when the sludge height reaches the discharge height or the sludge discharge time is 24 hours, the electric valve opens, and the vacuum pump or water jet starts working to perform sludge discharge. The sludge scraper 30 and the sludge discharge system ensure the quality of the effluent.

[0065] After the raw water enters the wastewater high-efficiency coalescence descaling device through the inlet pipeline, some of the precipitates are adsorbed onto the easily scaled packing material and rapidly coalesce and grow. Some of the large molecules naturally settle and are automatically discharged through the sludge discharge system. A small portion of the smaller molecules are suspended scale and other suspended matter, which enter the sludge scraping unit after multi-stage adsorption. The upper suspended matter is scraped off and discharged, achieving a descaling rate of 20%-40% in the effluent. Through automatic control of descaling, the operation is automatic and simple, more efficient and safer, and the descaling rate remains stable in the long term, achieving the expected target.

[0066] The above-mentioned efficient wastewater flocculation and descaling method can be further optimized and / or improved according to actual needs: Example 8: As an optimization of the above examples, as shown in the appendix Figure 11 As shown, in step S1, there are two efficient wastewater coalescence descaling devices, and calcium and magnesium ion monitors for collecting calcium and magnesium ion concentrations are installed on the outlet pipeline 19.

[0067] The calcium and magnesium ion monitors are connected to the control module. The sludge scraping unit is located after the two high-efficiency wastewater coalescence descaling devices. There are two high-efficiency wastewater coalescence descaling devices to ensure the efficiency of coalescence descaling.

[0068] The first-stage high-efficiency coalescing descaling device for wastewater has water inlet at the bottom and outlet at the top, while the second-stage high-efficiency coalescing descaling device for wastewater has water inlet at the top and outlet at the middle and lower parts, which then enters the sludge scraping unit. That is, the height of the inlet pipeline 18 of the first high-efficiency coalescing descaling device for wastewater is lower than the height of the outlet pipeline 19, while the height of the inlet pipeline 18 of the second high-efficiency coalescing descaling device for wastewater is higher than the height of the outlet pipeline 19.

[0069] Calcium and magnesium ion monitors are existing and well-known technologies. They are online monitors using the ion selective electrode method (ISE method) or spectrophotometry (colorimetric method). Based on the SAI and SI indices, reasonable calcium and magnesium ion concentrations are calculated and set. The packing material can be replaced according to the calcium and magnesium ion concentration. By adding calcium and magnesium ion monitors, it is convenient to determine the packing material replacement cycle and the packing material can be automatically replaced when the water quality does not meet the standards.

[0070] Example 9: As an optimization of the above examples, as shown in the appendix Figure 11 As shown, in step S2, when the concentration of calcium and magnesium ions in the effluent is greater than or equal to the first set concentration value and less than the second set concentration value, or when the replacement cycle of the first packing belt and the second packing belt 23 is greater than or equal to the set replacement cycle, the reduction motor 27 starts to work and pulls out the first packing belt or the second packing belt 23 in the scale reduction tank 1. When the concentration of calcium and magnesium ions in the effluent is greater than or equal to the second set concentration value, descaling agent is added into the inlet pipeline through the dosing mechanism.

[0071] This allows for automatic packing replacement under two conditions: In the initial state, all packing strips in the scale-reducing tank 1 are the first packing strip. When the concentration of calcium and magnesium ions in the effluent is greater than or equal to the first set concentration value and less than the second set concentration value, or when the replacement cycle of the first packing strip and the second packing strip 23 is greater than or equal to the set replacement cycle, according to calculation, the reasonable and economical replacement cycle is 40 days. Therefore, when the replacement cycle of the first packing strip and the second packing strip 23 is greater than or equal to 40 days, the packing needs to be replaced.

[0072] The wastewater high-efficiency coalescence descaling device stops injecting wastewater (closes the control valve on the inlet pipeline 18), and the geared motor 27 starts working. The geared motor 27 drives the receiving shaft 24 to rotate. The receiving shaft 24 drives the recovery roll 25 to rotate through the clutch 26. When the recovery roll 25 rotates, it pulls the second end of the first packing strip, so that the first packing strip is gradually pulled out of the sedimentation tank 29 and wrapped around the outside of the recovery roll 25. When the first packing strip is pulled out, it will drive the second packing strip 23 on the outside of the packing roll 20 to be pulled into the sedimentation tank 29. In this way, the first packing strip is replaced by the second packing strip 23. When the recovery length of the first packing strip reaches the set length (40m), the recovery roll 25 stops rotating. Similarly, if the second packing strip 23 in the sedimentation tank 29 is replaced next time, the geared motor 27 will pull out the second packing strip 23 and wrap it around the outside of the recovery roll 25, while the second packing strip 23 on the outside of the packing roll 20 will be pulled into the sedimentation tank 29. The packing can also be replaced when maintenance or other emergency situations are required. After that, check the replacement status of the old packing and recycle the old packing after the replacement is completed.

[0073] When the concentration of calcium and magnesium ions in the effluent is greater than or equal to the second set concentration value, the calcium and magnesium content in the influent exceeds the design index. In this case, the effluent will not be able to achieve the descaling target, and descaling agents need to be added for auxiliary descaling to ensure that the descaling rate meets the standard. It is also necessary to ensure that the treated water has a SAI (Rezner Stability Index) > 6 and an SI (Langriller Index) < 0. When the treated water has a SAI (Rezner Stability Index) > 6 and an SI (Langriller Index) < 0, there is no tendency for scale formation in the treated water.

[0074] The first set concentration value is 50 mg / L, and the second set concentration value is 100 mg / L. When the concentration of calcium and magnesium ions in the effluent continuously exceeds the first set concentration value but is less than the second set concentration value within the set time, or when the set packing replacement cycle of 40 days is reached, the packing will be automatically replaced. The first set concentration value and the second set concentration value can be calculated and set based on the water quality SAI and SI indices and the absence of scaling trend.

[0075] Example 10: As an optimization of the above embodiments, as shown in the appendix Figure 11As shown, the dosing mechanism includes a dosing pump, a connecting pipeline, and a dosing line. The inlet of the dosing pump is fixedly connected to one end of the dosing line, and the outlet of the dosing pump is fixedly connected to the liquid inlet line 18 via a connecting pipeline. The descaling agent includes a pH adjuster and a scale-forming agent.

[0076] As required, the outlet of the dosing pump is fixedly connected to each inlet pipeline 18. By adding chemical agents to assist in the descaling method, soft scale is formed. Some of it can be discharged through the sludge discharge system after natural sedimentation, thereby achieving the goal of descaling.

[0077] When the pH value is greater than 9, the tendency of high-hardness produced water to form scale is aggravated. Adding scale-forming agents can achieve rapid reaction and precipitation of scale-forming ions such as calcium and magnesium in the water, with a calcium and magnesium removal rate of over 99%.

[0078] pH adjusters can be calcium hydroxide or sodium hydroxide, and scale-forming agents can be soda ash, sodium bicarbonate, or carbon dioxide, etc. Sodium hydroxide hardening method is more effective for removing hardness from sodium bicarbonate type water. Lime-soda ash and soda ash hardening methods are suitable for produced water that needs to remove both carbonate hardness and non-carbonate hardness.

[0079] The pH adjuster and scale-forming agent work synergistically and can be added simultaneously or sequentially to water prone to scaling. The concentration of the pH adjuster and scale-forming agent in the solution is 20%-30%, which facilitates addition and management. This makes it easier to select and determine the concentration of the pH adjuster and scale-forming agent. By using the auxiliary double-alkali method for descaling, the descaling rate meets the design requirements even when the calcium and magnesium ion concentration exceeds the standard. With the assistance of the chemical method, this method can achieve a calcium removal rate of over 99%, or reach the index of SI < 0 and SAI > 6. It does not produce scale impact on subsequent processes, saves energy, and reduces maintenance and operating costs by more than 50%.

[0080] The equipment has a daily operating capacity of 1200m³. 3 After treatment, the calcium ion content of the wastewater decreased from 200 mg / L to 20 mg / L, and all the calcium ions of 180 mg / L were converted into calcium carbonate precipitate, resulting in a daily production of 540 kg of calcium carbonate scale; the scale amount m0 ​​is 540 kg.

[0081] Calcium carbonate scale consists of three parts: the first part, the floating mass m1, with a mass percentage Φ1 between 3% and 5%; therefore, m1 = m0 * Φ1; m1 ranges from 16.2 kg to 27 kg. The second part, the settling mass m2, with a mass percentage Φ2 between 70% and 80%; therefore, m2 = m0 * Φ2; m2 ranges from 378 kg to 432 kg. The third part, the adhered mass m3, with a mass percentage Φ3 between 20% and 30%; therefore, m3 = m0 * Φ3; m3 ranges from 108 kg to 162 kg. To calculate the scum removal cycle, taking a floating mass of 28.8 kg / d as an example, with a scum scale content of 10%, a scum water production rate of 98%, and the scum scraper running continuously for 30 hours and 24 hours, with a scraper speed of 0.5 r / min and scraping 20 L of scum per revolution, daily scum removal can be achieved. Calculating the automatic sludge removal cycle, taking a settling mass of 400 kg / d as an example, the sediment forms soft scale in the reaction settling tank 29 and settles to the bottom of the settling tank 29. The soft scale is evenly distributed at the bottom of the settling tank 29, and the soft scale density is 500 kg / m³. 3 Therefore, the daily volume of soft scale produced is 400 / 500 = 0.8m³. 3 The bottom area of ​​sedimentation tank 29 is designed to be 20m². 2 The probe is detected every 4 days, or the automatic sludge removal system is set to run 24 hours a day. The theoretical sludge removal capacity of the automatic sludge removal system is 4 * 0.8 = 3.2 m³. 3 The design of the negative pressure sludge removal system involves collecting sludge with a moisture content of 90%. Therefore, the actual sludge removal capacity of the automatic sludge removal system is 3.2 / 0.1 = 32 m³. 3 Design an automatic sludge removal system to collect 32m³ of sludge. 3 / h; working time 10-15min, working interval once every 24 days; The theoretical automatic packing replacement cycle is calculated, taking an adhesion mass of 120 kg / d as an example. The precipitated part adheres to the easily scaled packing. 200 first packing strips are vertically arranged in the scale reduction tank 1. Each first packing strip has a load-bearing capacity of 50 kg and can adhere to a maximum of 25 kg of calcium carbonate scale. Therefore, the 200 first packing strips can adhere to a maximum of 5000 kg of calcium carbonate scale. At this time, the total mass of the 200 first packing strips (their own weight is 2 kg) is 5400 kg. The load design of the support frame 7 is 10000 kg. At this time, the time for the easily scaled packing to reach the maximum scale amount is 5000 / 120 = 41 days. The automatic packing replacement device is designed to automatically replace the packing every 40 days, or automatically replace it after the calcium and magnesium ion online monitoring instrument reaches the set conditions.

[0082] The above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A wastewater high-efficiency coalescence descaling device, characterized in that... The system includes a right scale-reducing tank and a right scale-removing assembly located within the tank. The right scale-removing assembly includes a support frame, an upper support rod, a lower support rod, an upper pulley, a lower pulley, a packing roll, a winch, and a first packing strip with a strip structure. The support frame is installed inside the right scale-reducing tank. Several upper support rods are spaced apart on the upper part of the support frame. Several upper pulleys are rotatably installed on the outer side of each upper support rod from front to back. Lower support rods are provided on the lower part of the support frame corresponding to the positions between two adjacent upper support rods. Lower pulleys are rotatably installed on the outer side of each lower support rod corresponding to the position of an upper pulley. A packing roll corresponding to an upper pulley is rotatably installed on the upper left side of the support frame. A winch is provided on the upper right side of the support frame. A first packing strip with its first end fixedly connected to the corresponding packing roll is wound around the outer side of each leftmost upper pulley. The second end of each first packing strip is alternately wrapped around the lower pulley and the upper pulley and then fixedly connected to the winch. At least one inlet pipe is fixedly connected to the lower left side of the right scale-reducing tank at intervals. At least one outlet pipe is fixedly connected to the lower right side of the right scale-reducing tank at intervals. The first packing belt includes a central rope, spacers, packing plates, and packing wire bundles. The first and second ends of the central rope are fixedly connected to the packing roll and the winch, respectively. Several spacers are evenly distributed along the length of the outer side of the central rope. An annular packing plate fitted on the outer side of the central rope is provided between each two adjacent spacers. Several packing wire bundles are evenly distributed along the circumference of each packing plate.

2. The wastewater high-efficiency coalescence descaling device according to claim 1, characterized in that... Both the first and second ends of the central rope are fixedly connected to a lifting ring, and both the outer side of the upper pulley and the outer side of the lower pulley are provided with annular grooves that are wider on the outside and narrower on the inside.

3. The wastewater high-efficiency coalescence descaling device according to claim 1 or 2, characterized in that... A feeding shaft is fixedly installed on the upper left side of the support frame. A packing roll is rotatably installed on the outside of the feeding shaft corresponding to each upper pulley position. Several turns of spare packing tape are wound around the outside of the packing roll. The first end of the spare packing tape is fixedly connected to the outside of the packing roll, and the second end of the spare packing tape is detachably fixedly connected to the first end of the first packing tape. A damping plate is provided between the inside of the packing roll and the outside of the feeding shaft.

4. The wastewater high-efficiency coalescence descaling device according to claim 3, characterized in that... The winch includes a take-up shaft, a take-up reel, a clutch, and a geared motor. The take-up shaft is fixedly installed on the upper right side of the support frame. A take-up reel is fitted on the outside of the take-up shaft corresponding to each filler roll position. A clutch is provided between the take-up reel and the take-up shaft. The geared motor is fixedly installed on the right side of the support frame. The output shaft end of the geared motor is connected to the end of the take-up shaft.

5. The wastewater high-efficiency coalescence descaling device according to claim 3, characterized in that... The spare packing strip includes several second packing strips that are detachably and fixedly connected end to end. The first end of the second packing strip is detachably and fixedly connected to the first end of the first packing strip, and the last end of the second packing strip is detachably and fixedly connected to the outside of the packing roll.

6. The wastewater high-efficiency coalescence descaling device according to claim 4 or 5, characterized in that... It also includes a control module, a force limiter installed between the reel and the take-up shaft, and an electromagnetic brake installed between the right side of the support frame and the take-up shaft. The force limiter, electromagnetic brake, clutch, and geared motor are all connected to the control module.

7. A method for efficient coalescence descaling of wastewater using the wastewater efficient coalescence descaling device as described in any one of claims 1 to 6, characterized in that... The steps include the following: S1, in the process sequence, connect at least one high-efficiency wastewater coalescence and descaling device and one sludge scraping unit. The sludge scraping unit includes a sedimentation tank, a sludge scraper and a sludge discharge system. The sludge scraper is set at the top of the sedimentation tank to scrape off floating impurities in the water. The sludge discharge system is distributed at the bottom of the sedimentation tank to ensure that the impurities at the bottom are discharged in a timely manner. S2, raw water enters the right scale-reducing tank through the inlet pipeline, and the first packing belt adsorbs scale-forming substances in the raw water; S3, the suspended scale entering the slag scraping unit is scraped off by the slag scraper; S4. When the sludge thickness at the bottom of the settling tank is greater than or equal to the set thickness or the sludge discharge cycle is equal to the set sludge discharge cycle, the sludge discharge system starts to work.

8. The efficient wastewater coalescence descaling method according to claim 7, characterized in that... In step S1, there are two efficient wastewater coalescence descaling devices, and calcium and magnesium ion monitors for collecting calcium and magnesium ion concentrations are installed on the effluent pipeline.

9. The efficient wastewater coalescence descaling method according to claim 7 or 8, characterized in that... In step S2, when the concentration of calcium and magnesium ions in the effluent is greater than or equal to the first set concentration value and less than the second set concentration value, or when the replacement cycle of the first packing belt and the second packing belt is greater than or equal to the set replacement cycle, the reduction motor starts to work and pulls out the first packing belt or the second packing belt in the scale reduction tank. When the concentration of calcium and magnesium ions in the effluent is greater than or equal to the second set concentration value, descaling agent is added into the inlet pipeline through the dosing mechanism.

10. The efficient wastewater coalescence descaling method according to claim 7 or 8, characterized in that... The dosing mechanism includes a dosing pump, connecting pipelines, and a dosing pipeline. The inlet of the dosing pump is fixedly connected to one end of the dosing pipeline, and the outlet of the dosing pump is fixedly connected to the liquid inlet pipeline. The descaling agent includes a pH adjuster and a scale-forming agent.

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