Horizontal descaling tank

Abstract

The utility model relates to the technical field of oil field gathering and transportation production, in particular to a horizontal descaling tank which comprises a tank body, a stirring assembly, a scale gathering assembly and a liquid storage tank, and a water baffle is fixedly installed on the inner side of the tank body. The device is reasonable and compact in structure, existing well-known magnetic seeds such as liquid magnets or ferroferric oxide magnetic seeds are added into the liquid storage tank, the magnetic seeds enter the inner side of the left portion of the tank body after passing through the seed feeding pipeline, produced water enters the inner side of the left portion of the tank body through the water inlet, and when the stirring assembly works, the magnetic seeds and the produced water entering the tank body are fully mixed, so that the production efficiency is improved. The mixed liquid passes through the overflowing channel between the lower side of the water baffle and the inner side of the lower portion of the tank body and then gradually fills the scale gathering assembly in an overflowing mode, when the scale gathering assembly works, scaling ions in produced water are gathered and rapidly separated out, the scaling amount and the calcium loss rate are greatly increased, and therefore the scaling ions are efficiently removed, and the service life of the scale gathering assembly is prolonged. And long-term less-scale or no-scale operation of subsequent process pipelines is ensured.

Description

Technical Field

[0001] This utility model relates to the field of oilfield gathering and transportation production technology, and is a horizontal descaling tank. Background Technology

[0002] Scaling in oilfield pipelines is caused by the deposition of insoluble salts formed by calcium and magnesium ions and carbonate and sulfate ions in mineralized water. This leads to reduced pipe diameter, increased resistance, increased energy consumption, and even blockage. Traditional descaling methods such as hot washing, mechanical cleaning, chemical cleaning, and the addition of scale inhibitors have achieved certain results, but they also have problems such as high operating costs and significant environmental pollution, making it difficult to meet the needs of efficient, safe, and sustainable production in oilfields.

[0003] Chinese patent document CN104209301A discloses a method and apparatus for rapid scale collection and removal in a gathering and transportation pipeline. The rapid scale collection and removal apparatus for a gathering and transportation pipeline comprises six three-way cylinders connected by stainless steel flanges to form a descaling unit. The structure of each descaling unit is as follows: the right end of the first three-way cylinder is connected to the left end of the second three-way cylinder; the lower end of the first three-way cylinder is connected to the upper end of the third three-way cylinder; the right end of the second three-way cylinder is connected to the upper end of the sixth three-way cylinder; the lower end of the second three-way cylinder is connected to the upper end of the fourth three-way cylinder; the left end of the fourth three-way cylinder is connected to the right end of the third three-way cylinder; and the right end of the fourth three-way cylinder is connected to the upper end of the fifth three-way cylinder. Each descaling unit contains a heating rod working cylinder in its upper and lower horizontal cylinders, and the heating rod working cylinder is covered with a screen. Four descaling units are connected by flanges to form a complete unit. A descaling unit is provided, with one end of the first, second, and third control valves connected, the other end of the third control valve connected to the first descaling unit, the other end of the first descaling unit connected to the fourth control valve, one end of the fourth, fifth, and sixth control valves connected, the other end of the sixth control valve connected to the second descaling unit, the other end of the second descaling unit connected to the seventh control valve, one end of the seventh, eighth, and ninth control valves connected, the other end of the ninth control valve connected to the third descaling unit, the other end of the third descaling unit connected to the tenth control valve, one end of the tenth, eleventh, and twelfth control valves connected, and the other ends of the second, fifth, eighth, and eleventh control valves connected together.

[0004] Chinese patent document CN108204206A discloses a gathering and conveying pipe bundle, a scale-collecting core, a gathering and conveying coalescence descaling device and system. The gathering and conveying pipe bundle includes: a branch pipe connected to the incoming liquid pipeline; a guide pipe connected to the outgoing liquid pipeline; multiple bottom branch pipes, all connected to the branch pipe; multiple top branch pipes, all connected to the guide pipe; and multiple sets of risers, each set of risers having one end connected to a bottom branch pipe and the other end connected to a top branch pipe. Each set of risers includes multiple risers. The branch pipe is used to introduce water from the incoming liquid pipeline, which then passes sequentially through the bottom branch pipes, risers, and top branch pipes before being discharged to the outgoing liquid pipeline via the guide pipe. The scale-collecting core... The scale-collecting core cylinder is disposed within at least one of the bottom branch pipe, top branch pipe, and riser pipe of the aforementioned gathering and transporting pipe bundle. The scale-collecting core cylinder includes: a mesh plate assembly disposed within the pipe bundle; wherein the mesh plate assembly has multiple first mesh plates, which intersect each other; the gathering and transporting coalescing descaling device includes: a gathering and transporting pipe bundle, which is the aforementioned gathering and transporting pipe bundle; a scale-collecting core cylinder disposed within the pipe bundle, which is the aforementioned scale-collecting core cylinder; and a gathering and transporting coalescing descaling system includes: multiple gathering and transporting coalescing descaling devices, which are the gathering and transporting coalescing descaling devices described above; wherein the multiple gathering and transporting coalescing descaling devices are connected in series or in parallel.

[0005] Existing tubular scale collection devices have good performance in single-well systems, but their performance in combined stations is not ideal. This is mainly because the large flow rate of the combined station results in the short residence time of the produced water in the device, and the scale is discharged from the device before it can crystallize and precipitate. Summary of the Invention

[0006] This utility model provides a horizontal descaling tank that overcomes the shortcomings of the prior art. It can effectively solve the problem that existing tubular scale collection devices have low scaling efficiency when the scale is discharged before it crystallizes and precipitates when the volume of extracted water is large.

[0007] The technical solution of this utility model is achieved through the following measures: A horizontal descaling tank includes a tank body, a stirring assembly, a scale-collecting assembly, and a storage tank. A baffle plate is fixedly installed on the inner side of the tank body, and a flow passage is formed between the lower side of the baffle plate and the lower inner side of the tank body. A stirring assembly is provided in the tank body corresponding to the left position of the baffle plate, and a scale-collecting assembly for collecting scale-forming ions in the extracted water is provided in the tank body corresponding to the right position of the baffle plate. An inlet, a seed inlet, and an oil outlet are provided at intervals on the outer side of the tank body corresponding to the left position of the baffle plate. A seed inlet pipeline is fixedly connected between the outlet of the storage tank and the seed inlet. An outlet is provided on the upper outer side of the tank body corresponding to the right position of the baffle plate. The scale-collecting assembly includes a flow mechanism and a heater. A flow chamber is provided on the inner side of the right part of the tank body. Several flow mechanisms are arranged parallel to each other at intervals in the flow chamber. A heater is provided in each flow mechanism.

[0008] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0009] The aforementioned scale-collecting component may also include an adsorption shell and a magnet. The tank includes a left end cap, a tank body, and a right end cap that are detachably and fixedly installed together from left to right. The water inlet is located on the upper outer side of the left end cap. The seed inlet and oil outlet are spaced apart on the upper left side of the tank body. A sealing plate is fixedly installed on the inner side of the left end of the right end cap. A fixing plate is provided on the inner side of the right end of the tank body corresponding to the left side of the sealing plate. Several adsorption shells fitted into the inner right side of the tank body are fixedly installed on the left side of the fixing plate along the circumferential direction. The lower left side of the uppermost adsorption shell is fixedly installed together with the upper side of the baffle plate. A magnet is provided inside the adsorption shell. The adsorption shell, the left side of the fixing plate, and the right side of the baffle plate form a flow chamber. The water outlet is located on the upper outer side of the right end cap. A connecting hole extending from the left end to the left side of the fixing plate is provided on the upper right side of the sealing plate.

[0010] The aforementioned flow passage mechanism may include a corrugated plate, and a number of pairs of guide rails are provided on the inner wall of the flow passage chamber. Each pair of guide rails is equipped with a corrugated plate that is inclined upward on the right side relative to the left side. The corrugated plate includes a number of corrugated plates fixed together, and a number of heaters are provided at intervals between two corrugated plates of each corrugated plate.

[0011] The aforementioned corrugated plate may also include a fixing frame, the upper right side and the lower right side of the fixing frame being slidably mounted on the left side of a pair of guide rails in the front-back direction, and the inner side of the fixing frame being fixedly mounted together with the outer side of the corrugated plate.

[0012] The heater may include an electric heating rod and a sleeve. Two sleeves are provided between two of the two corrugated plates of each corrugated plate, and each sleeve contains an electric heating rod.

[0013] The upper inner wall of the can body corresponding to the position above the adsorption shell can be provided with a closed upper chamber, and a number of pairs of upper pulleys are arranged at intervals on the left and right sides of the upper chamber. The lower inner wall of the can body corresponding to the position below the adsorption shell is provided with a closed lower chamber, and a number of pairs of lower pulleys are arranged at intervals on the left and right sides of the lower chamber.

[0014] The above may also include a sewage tank, with a sewage discharge hole on the lower right side of the adsorption shell that communicates with the right side of the flow chamber. A sewage discharge pipe with its lower end sealed and passing through the tank body is fixedly connected to the outside of the adsorption shell corresponding to the position of the sewage discharge hole. The lower end of the sewage discharge pipe is fixedly connected to the inlet of the sewage tank, and a sewage discharge valve is installed on the sewage discharge pipe.

[0015] The aforementioned stirring assembly may include a stirring motor and stirring blades. The stirring motor is fixedly installed on the left side of the middle part of the left end cap. A stirring shaft is provided on the inner side of the left part of the tank body corresponding to the left side of the baffle plate. Several stirring blades are arranged at intervals on the outer side of the stirring shaft. The left end of the stirring shaft passes through the left end cap and is connected to the right end of the output shaft of the stirring motor. A magnetic seed inlet is fixed on the inner side of the tank body corresponding to the seed inlet position, located above the stirring blades. The magnetic seed inlet is conical with a smaller top and a larger bottom.

[0016] The above may also include a control module and a dosing pump. A first liquid level sensor is provided on the left side of the tank body, and a second liquid level sensor is provided inside the storage tank. The upper end of the seeding pipeline is fixedly connected to the outlet of the dosing pump, and the inlet of the dosing pump is fixedly connected to the outlet of the storage tank. A first flow meter, a first pressure gauge, and a first control valve are installed sequentially along the direction of medium flow on the seeding pipeline. The first liquid level sensor, the first flow meter, and the first control valve are all connected to the control module.

[0017] This utility model has a reasonable and compact structure. Existing known magnetic seeds, such as liquid magnets or iron oxide magnetic seeds, are added to the storage tank. The magnetic seeds enter the inner left side of the tank through the seeding pipeline. The extracted water enters the inner left side of the tank through the inlet. When the stirring component is working, it fully mixes the magnetic seeds with the extracted water entering the tank. The mixed liquid gradually fills the scale-forming component by overflow through the flow channel between the lower side of the baffle plate and the lower inner side of the tank. When the scale-forming component is working, it causes the scale ions in the extracted water to gather and precipitate rapidly, which greatly increases the amount of scale and the calcium loss rate, thereby efficiently removing scale ions and ensuring long-term low-scale or scale-free operation of subsequent process pipelines. Attached Figure Description

[0018] Appendix Figure 1 This is a schematic diagram of the main structure of the preferred embodiment of the present utility model.

[0019] Appendix Figure 2 This is a schematic diagram of the front cross-sectional structure of Embodiment 1 of this utility model.

[0020] Appendix Figure 3 This is a schematic diagram of the main sectional view of the tank in Embodiment 1 of this utility model.

[0021] Appendix Figure 4 These are schematic diagrams of the main cross-sectional structure of embodiments two to eight of this utility model.

[0022] Appendix Figure 5 This is a three-dimensional structural diagram of the flow-through mechanism in Embodiment 2 of this utility model.

[0023] Appendix Figure 6 This is a side sectional view of the sleeve in Embodiment 5 of this utility model.

[0024] The codes in the attached diagram are as follows: 1 is the baffle plate, 2 is the flow channel, 3 is the storage tank, 4 is the seeding pipeline, 5 is the left end cap, 6 is the tank body, 7 is the right end cap, 8 is the sealing plate, 9 is the adsorption shell, 10 is the magnet, 11 is the fixing plate, 12 is the guide rail, 13 is the corrugated plate, 14 is the fixing frame, 15 is the electric heating rod, 16 is the sleeve, 17 is the upper chamber, 18 is the lower chamber, 19 is the upper pulley, 20 is the lower pulley, 21 is the drain tank, 22 is the drain pipe, 23 is the drain valve, 24 is the stirring motor, 25 is the stirring blade, and 26 is the stirring shaft. 27 is the magnetic seed inlet, 28 is the control module, 29 is the dosing pump, 30 is the first liquid level sensor, 31 is the second liquid level sensor, 32 is the first flow meter, 33 is the second flow meter, 34 is the third flow meter, 35 is the first pressure gauge, 36 is the second pressure gauge, 37 is the third pressure gauge, 38 is the first control valve, 39 is the second control valve, 40 is the third control valve, 41 is the first connecting pipeline, 42 is the second connecting pipeline, 43 is the negative pressure pump, 44 is the water inlet pipeline, 45 is the water outlet pipeline, 46 is the flow chamber, and 47 is the pre-mixing zone. Detailed Implementation

[0025] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0026] In this utility model, 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.

[0027] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0028] Example 1: As shown in the attached document Figures 1 to 4 As shown, the horizontal descaling tank includes a tank body, a stirring assembly, a scale-collecting assembly, and a storage tank 3. A baffle plate 1 is fixedly installed on the inner side of the tank body, and a flow channel 2 is formed between the lower side of the baffle plate 1 and the lower inner side of the tank body. A stirring assembly is provided in the tank body corresponding to the left position of the baffle plate 1, and a scale-collecting assembly for collecting scale-forming ions in the extracted water is provided in the tank body corresponding to the right position of the baffle plate 1. An inlet, a seed inlet, and an oil outlet are provided at intervals on the outer side of the tank body corresponding to the left position of the baffle plate 1. A seed inlet pipeline 4 is fixedly connected between the outlet of the storage tank 3 and the seed inlet. An outlet is provided on the upper outer side of the tank body corresponding to the right position of the baffle plate 1. The scale-collecting assembly includes a flow mechanism and a heater. A flow chamber 46 is provided on the inner side of the right part of the tank body. Several flow mechanisms are arranged parallel to each other at intervals in the flow chamber 46, and a heater is provided in each flow mechanism.

[0029] A known magnetic seed, such as a liquid magnet or a magnetite, is added to the storage tank 3. The magnetic seed enters the inner left side of the tank through the seeding pipeline 4. The extracted water enters the inner left side of the tank through the inlet. When the stirring component is working, it fully mixes the magnetic seed with the extracted water entering the tank. The mixed liquid gradually fills the scale-forming component by overflow through the flow channel 2 between the lower side of the baffle plate 1 and the lower inner side of the tank. When the scale-forming component is working, it causes the scale ions in the extracted water to aggregate and precipitate rapidly, which greatly increases the amount of scale and the calcium loss rate, thereby efficiently removing scale ions and ensuring long-term low-scale or scale-free operation of the subsequent process pipelines.

[0030] The above-mentioned horizontal descaling tank can be further optimized and / or improved according to actual needs:

[0031] Example 2: As an optimization of the above examples, as shown in the appendix. Figures 1 to 4 As shown, the scale-collecting assembly also includes an adsorption housing 9 and a magnet 10. The tank includes a left end cap 5, a tank body 6, and a right end cap 7, which are detachably and fixedly installed together from left to right. The water inlet is located on the upper outer side of the left end cap 5. The seed inlet and oil outlet are spaced apart on the upper left side of the tank body 6. A sealing plate 8 is fixedly installed on the inner side of the left end of the right end cap 7. A fixing plate 11 is provided on the inner side of the right end of the tank body 6 corresponding to the left side of the sealing plate 8. Several adsorption housings 9 are fixedly installed on the left side of the fixing plate 11 along the circumferential direction. The lower left side of the uppermost adsorption housing 9 is fixedly installed together with the upper side of the baffle plate 1. A magnet 10 is provided inside the adsorption housing 9. The adsorption housing 9, the left side of the fixing plate 11, and the right side of the baffle plate 1 form a flow chamber 46. The water outlet is located on the upper outer side of the right end cap 7. A connecting hole extending from the left end to the left side of the fixing plate 11 is provided on the upper right side of the sealing plate 8.

[0032] Based on demand, the produced water flow rate Q, m 3 / d; the extracted water flow velocity v, m / s; the cross-section of tank body 6 is circular, and the cross-sectional area A (m) of tank body 6 (inner side); where the formula for calculating A is: ;

[0033] The inner wall diameter of tank body 6 is D1, in meters; the formula for calculating D1 is: ;

[0034] The outer wall diameter of tank body 6 is D2, in meters; the formula for calculating D2 is: ;

[0035] The length of tank body 6 is L1, m; the liquid volumetric flow rate is V. L m 3 / h; Liquid area percentage A L It is usually taken between 0% and 100%; the formula for calculating L1 is:

[0036] ;

[0037] The volume V1,m of the tank body 6 3 The formula for calculating V1 is: ;

[0038] The water content of the incoming liquid is ,%; the height of the water baffle 1, H1, m; the formula for calculating H1 is: ;

[0039] The residence time t, min, of the liquid in the tank; the formula for calculating t is: ;

[0040] The volume V2,m of the flow chamber 46 3 The formula for calculating V2 is: ;

[0041] The length L2 of the flow chamber 46 is in meters; the formula for calculating L2 is: ;

[0042] The thickness d1, m, of the adsorption shell 9 (magnetic field); the formula for calculating d1 is: ;

[0043] The inlet height (the distance between the lower side of the inlet and the bottom wall of the tank body) H2, in meters; the formula for calculating H2 is:

[0044] ;

[0045] The outlet height (the distance between the lower side of the outlet and the bottom wall of the tank body) H3, in meters; the formula for calculating H3 is:

[0046] ;

[0047] The diameter of the inlet is d2, m; the diameter of the outlet is d3, m; the formulas for calculating d2 and d3 are:

[0048] ;

[0049] The upper left, rear left and lower left of the fixing plate 11 are all fixedly installed with an adsorption shell 9 that is fitted inside the right side of the tank body 6.

[0050] This horizontal descaling tank can be used as a rapid scale collection and removal device, enabling the removal of calcium carbonate scale from oilfield produced water (mineralized water) without special treatment. At the same time, the flow mechanism can be disassembled and replaced without the use of large equipment. The flow mechanism filled with scale can be cleaned using conventional treatment methods before reuse. In addition, this invention can also heat the liquid and can be used as a heat preservation device, thereby meeting the production needs under different conditions.

[0051] Example 3: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown in Figures 4 to 6, the flow mechanism includes a corrugated perforated plate. Several pairs of guide rails 12 are provided on the inner wall of the flow chamber 46. Each pair of guide rails 12 is equipped with a corrugated perforated plate that is inclined upward on the right side relative to the left side. The corrugated perforated plate includes several corrugated perforated pieces 13 fixed together. Several heaters are arranged at intervals between two corrugated perforated pieces 13 of each corrugated perforated plate.

[0052] Depending on the requirements, the guide rail 12 is a known technology, such as two triangular prisms spaced back and forth or horizontal bars arranged in the front and back directions. This arrangement makes it easy for the flow mechanism to quickly pull out the corrugated plate forward after pulling out the tank body 6 to the right, which is convenient for disassembly and maintenance. The corrugated plate can be reused after cleaning.

[0053] The right side of the corrugated plate is tilted upward relative to the left side. In this embodiment, the corrugated plate is placed at an angle of 45°. The corrugated plate 13 is a known prior art, such as a perforated plate corrugated packing. The included angle of the V-shaped groove on the surface of the corrugated plate 13 is 120 degrees. The material of the corrugated plate 13 is PTFE (polytetrafluoroethylene). The corrugated plate includes six corrugated plates 13 fixed together, that is, the number of layers of the corrugated plate is six.

[0054] The magnetic induction intensity of the magnet 10 inside the adsorption housing 9 is B, GS; six pairs of guide rails 12 are provided on the inner wall of the flow chamber 46, and each pair of guide rails 12 is equipped with a corrugated plate that is inclined upward on the right side relative to the left side, that is, there are six corrugated plates. The lengths of the six corrugated plates from left to right are L3, m; L4, m; L5, m; L6, m; L7, m; L8, m;

[0055] The formulas for calculating L3 and L8 are as follows: ;

[0056] The formulas for calculating L4 and L7 are as follows: ;

[0057] The calculation formulas for L5 and L6 are as follows: ;

[0058] The width W1 of the corrugated plate, in meters; the formula for calculating W1 is: ;

[0059] The thickness H4 of the corrugated plate, in meters; the formula for calculating H4 is: ;

[0060] Example 4: As an optimization of the above examples, as shown in the appendix. Figure 5As shown, the corrugated plate also includes a fixing frame 14. The upper right and lower right sides of the fixing frame 14 are slidably mounted on the left side of the pair of guide rails 12 in the front-back direction. The inner side of the fixing frame 14 is fixedly mounted together with the outer side of the corrugated plate 13.

[0061] Depending on the requirements, the fixing frame 14 can be fixed in the form of a rectangular or square frame using existing known profiles, which facilitates the assembly of the corrugated sheet 13 and the installation of the heater. Multiple corrugated sheets 13 can be fixed together, which also facilitates the disassembly and assembly of the corrugated plate.

[0062] Example 5: As an optimization of the above examples, as shown in the appendix. Figure 6 As shown, the heater includes an electric heating rod 15 and a sleeve 16. Two sleeves 16 are arranged at intervals between two of the corrugated plates 13 of each corrugated plate, and each sleeve 16 is provided with an electric heating rod 15.

[0063] As required, the electric heating rod 15 is a known technology, and the sleeve 16 is fixed between the two corrugated plates 13 in the middle by a known snap fastener.

[0064] The diameter d4 of the electric heating rod 15 is in meters (m); the formula for calculating d4 is: ;

[0065] The inner diameter d5 of sleeve 16 is in meters (m); the formula for calculating d5 is: ;

[0066] The length L9 of sleeve 16 is in meters; the formula for calculating L9 is: .

[0067] The sleeve 16 is positioned between two corrugated plates 13 in the middle of the corrugated plate, one of which is positioned at the front and the other at the rear. The electric heating rod 15 can raise the temperature of the liquid in the storage tank and accelerate the scale accumulation effect. The heating temperature in the flow chamber 46 is generally set between 50°C and 75°C.

[0068] After the extracted water (mineralized water) and magnetic seeds are mixed, they flow into the flow chamber 46 together. In the magnetic field formed by the magnet 10 in the adsorption shell 9, under the combined action of the corrugated plate 13 and the electric heating rod 15, the calcium loss rate of the mixed liquid in the flow chamber 46 exceeds 50%. The electric heating rod 15 can be powered by existing photovoltaic panels.

[0069] Example 6: As an optimization of the above examples, as shown in the appendix. Figures 1 to 4 As shown, the upper inner wall of the tank body 6, corresponding to the position above the adsorption shell 9, is provided with a closed upper chamber 17, and a number of pairs of upper pulleys 19 are arranged at intervals on the left and right sides in the upper chamber 17. The lower inner wall of the tank body 6, corresponding to the position below the adsorption shell 9, is provided with a closed lower chamber 18, and a number of pairs of lower pulleys 20 are arranged at intervals on the left and right sides in the lower chamber 18.

[0070] Both the upper chamber 17 and the lower chamber 18 can be formed by an inner shell fixed to the inner side of the right side of the tank body 6 and the inner wall of the tank body 6. The inner shell can be a known non-magnetic material. The upper pulley 19 and the lower pulley 20 are both installed on the outer side of the rotating shafts that are parallel to each other on the left and right. The setting of the upper pulley 19 and the lower pulley 20 makes it convenient to separate the right end cap 7 and the sealing plate 8 from the tank body 6, and then pull the fixing plate 11 and the adsorption shell 9 out of the tank body 6 as a whole for maintenance. The disassembly and assembly are convenient.

[0071] Example 7: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown in Figure 4, it also includes a sewage tank 21. The lower right side of the adsorption shell 9 is provided with a sewage discharge hole that communicates with the right side of the flow chamber 46. A sewage discharge pipe 22 with its lower end sealed and passing through the tank body 6 is fixedly connected to the outside of the adsorption shell 9 corresponding to the position of the sewage discharge hole. The lower end of the sewage discharge pipe 22 is fixedly connected to the inlet of the sewage tank 21. A sewage discharge valve 23 is installed on the sewage discharge pipe 22.

[0072] When the fouling in the flow chamber 46 reaches a certain level, the drain valve 23 can be opened to discharge the fouling into the drain tank 21 without stopping production, ensuring the continuous and efficient operation of the equipment. If internal maintenance and repair of the tank are required, the liquid supply and magnetic seeding must be stopped, the drain valve 23 opened, the liquid in the tank and the fouling at the bottom of the tank emptied, the right end cap 7 and the sealing plate 8 removed, and the fixing plate 11 and the flow mechanism pulled out of the tank body 6. This allows access to the tank body 6 for inspection and maintenance. After completion, the equipment is reassembled in reverse order to ensure that all components are well sealed and normal production is restored. In order to facilitate the disassembly and assembly of the drain pipe 22 with the tank body 6 and the adsorption shell 9, the upper end of the drain pipe 22 and the lower adsorption shell 9 are detachably and sealed together using existing known technology.

[0073] Example 8: As an optimization of the above examples, as shown in the appendix Figures 1 to 4 As shown, the stirring assembly includes a stirring motor 24 and stirring blades 25. The stirring motor 24 is fixedly installed on the left side of the middle part of the left end cap 5. A stirring shaft 26 is provided on the inner side of the left part of the tank body 6 corresponding to the position to the left of the baffle plate 1. Several stirring blades 25 are arranged at intervals on the outer side of the stirring shaft 26. The left end of the stirring shaft 26 passes through the left end cap 5 and is connected to the right end of the output shaft of the stirring motor 24. A magnetic seed inlet 27 is fixed on the inner side of the tank body 6 corresponding to the seed inlet position, located above the stirring blades 25. The magnetic seed inlet 27 is conical with a smaller top and a larger bottom.

[0074] As required, the stirring shaft 26 is horizontally positioned at the center of the left side of the tank body 6, and the liquid level height H5 of the aqueous phase on the inner side of the left side of the tank body 6 is given by the formula: ;in The height of the water-retaining plate 1 is in meters.

[0075] Five stirring blades 25 are spaced apart on the outer side of the stirring shaft 26. Each stirring blade 25 includes two symmetrical blades fixed to the outer side of the stirring shaft 26, with a blade length L. 10 ,m;L 10 The calculation formula is: ;in The inner diameter of the tank body is 6 m;

[0076] Blade width W2, m; the formula for calculating W2 is: .

[0077] A pre-stirring zone 47 is formed inside the tank body 6 on the left side of the baffle. The pre-stirring zone 47 is used to add magnetic seeds and stir them to shorten the nucleation induction period of scale in the liquid. The magnetic seed inlet 27 is a cone shape with a smaller top and a larger bottom. In this way, the magnetic seeds can be evenly added to the extracted water on the left side of the tank body 6 after passing through the magnetic seed inlet 27, so that the magnetic seeds and the extracted water can be quickly and evenly mixed together.

[0078] Example 9: As an optimization of the above examples, as shown in the appendix Figure 1 As shown, it also includes a control module 28 and a dosing pump 29. A first liquid level sensor 30 is provided on the left side of the tank body 6, and a second liquid level sensor 31 is provided inside the storage tank 3. The upper end of the seeding pipeline 4 is fixedly connected to the outlet of the dosing pump 29, and the inlet of the dosing pump 29 is fixedly connected to the outlet of the storage tank 3. A first flow meter 32, a first pressure gauge 35, and a first control valve 38 are installed sequentially on the seeding pipeline 4 along the direction of medium flow. The first liquid level sensor 30, the first flow meter 32, and the first control valve 38 are all connected to the control module 28.

[0079] According to requirements, an inlet pipe 44 is fixedly connected to the outer side of the left end cap 5 corresponding to the inlet position. A second flow meter 33, a second pressure gauge 36, and a second control valve 39 are sequentially installed on the inlet pipe 44 along the medium flow direction. A first connecting pipe 41 is fixedly connected between the oil outlet and the inlet of the delivery pump, and a second connecting pipe 42 is fixedly connected to the outlet of the delivery pump. The delivery pump can be a known negative pressure pump 43. An outlet pipe 45 is fixedly connected between the outer side of the right end cap 7 corresponding to the outlet position and the second connecting pipe 42. A second control valve 39 is sequentially installed on the outlet pipe 45 along the medium flow direction. There is a third pressure gauge 37, a third flow meter 34, and a third control valve 40. The second flow meter 33, the second pressure gauge 36, the second control valve 39, the third pressure gauge 37, the third flow meter 34, and the third control valve 40 are all connected to the control module 28. The control module 28 is a known programmable control module. The dosing pump 29 is an electric micro feeder with a dosing capacity of 10-500 mL / min. The control module 28 is connected to the dosing pump 29. A known float-type liquid level sensor is also installed on the left side of the tank body 6. The float-type liquid level sensor is connected to the control module 28.

[0080] The storage tank 3 is a vertical cylindrical tank. The lower outer side of the storage tank 3 is provided with a slot that matches the housing of the dosing pump 29. The housing of the dosing pump 29 is snapped together with the storage tank 3, so that the storage tank 3 can be fixed to the tank body 6 through the dosing pump 29 and the seeding pipeline 4.

[0081] The volume V3, m of storage tank 3 3 The formula for calculating V3 is: ;in Let 6 be the volume of the can body.

[0082] The height of storage tank 3 is H6, m; the diameter of storage tank 3 is d6, m; the formulas for calculating H6 and d6 are:

[0083] ;

[0084] The liquid contained in storage tank 3 is ferric oxide magnetic seed mother liquor. The target concentration of the ferric oxide magnetic seed mother liquor mixed with the produced water is C1, g / L; the concentration of the ferric oxide magnetic seed mother liquor is C2, ppm; the formula for calculating C2 is: ;

[0085] The distance L between the lower side (mouth) of the storage tank 3 and the upper side of the tank body 6 11 ,m;L 11 The calculation formula is: ;

[0086] Sewage tank 21, volume V4, m 3 The formula for calculating V4 is: ;

[0087] The height of the sewage tank 21 is H7, m; the inner diameter of the sewage tank 21 is d7, m; the formulas for calculating H7 and d7 are:

[0088] .

[0089] A pre-stirring zone 47 is formed inside the tank body 6 on the left side of the baffle. Based on the changes in the liquid level of the pre-stirring zone 47 (the first liquid level sensor 30 collects the liquid level), and the pressure and flow changes of the seeding pipeline 4, the inlet pipeline 44, and the outlet pipeline 45, the magnetic seed addition flow rate is adjusted in real time by the control module 28 to mix the magnetic seed with the produced water, thereby shortening the nucleation induction period of the scale. This ensures that the produced water reaches the nucleation induction period just as it enters the flow chamber 46, achieving targeted and rapid scaling and descaling.

[0090] The mineralized water first flows into the inner left side of the tank body 6 through the inlet. After entering the inner left side of the tank body 6 through the inlet, the mineralized water gradually fills the pre-stirring zone 47 under the action of gravity. The oil in the mineralized water flows out through the oil outlet, the first connecting pipeline 41, and the second connecting pipeline 42 at the top of the tank body 6. The control module 28 controls the dosing pump 29 to adjust the dosing flow rate of the magnetic seed according to the flow rate of the mineralized water flowing into the tank body 6 and the liquid level in the tank. When the stirring motor 24 is working, it drives the stirring blades 25 to rotate, so that the mineralized water and the magnetic seed can be fully mixed. The mixture flows into the overflow chamber 46 under the action of the baffle plate 1. Under the action of the corrugated plate 13 and the electric heating rod 15, the scale and mineralized water are separated. The separated mineralized water flows out through the outlet pipe 45 in the upper right corner and then merges with the oil flow in the second connecting pipe 42. The separated scale and dirt gather on the surface of the corrugated plate 13. A very small amount of tiny magnetic seeds sink to the bottom of the overflow chamber 46 and are discharged into the drain tank 21 through the drain pipe 22 to ensure that the horizontal descaling tank will not be blocked due to the accumulation of calcium scale.

[0091] Different descaling processes can be selected according to the different mineralization levels of the mineralized water. When the mineralization level of the mineralized water is 0-4000ppm, the corrugated plate 13 and magnet 10 are activated. When the mineralization level is 4000ppm-8000ppm, the corrugated plate 13 and magnet 10 are activated, and the magnetic seed in the storage tank 3 is introduced into the tank body 6 through the dosing pump 29. After the stirring motor 24 is activated, it drives the blade to rotate, and the magnetic seed and liquid are fully mixed. When the mineralization level is greater than 8000ppm, the corrugated plate, magnet 10, and electric heating rod 15 are activated. The magnetic seed in the storage tank 3 is introduced into the tank body 6 through the dosing pump 29. After the stirring motor 24 is activated, it drives the blade to rotate, and the magnetic seed and liquid are fully mixed. The complete descaling process is used to ensure the best scale accumulation effect.

[0092] This horizontal descaling tank utilizes the synergistic effects of electric heating, a magnetic field, magnetic seeds, and a corrugated plate to significantly improve the calcium loss rate and scaling rate of mineralized water. Electric heating increases the fluid temperature, reducing the solubility of scaling substances; the magnetic field influences the trajectory of ions, promoting the directional migration and aggregation of scaling ions; the magnetic seeds provide adsorption sites for crystals; and the corrugated plate 13 easily adsorbs scaling ions and enhances fluid mass transfer, promoting heterogeneous nucleation scaling. These effects improve scaling efficiency and shorten the nucleation induction period. Furthermore, the flow mechanism and magnetic seeds can be removed, cleaned, and reinserted after scaling, avoiding resource waste and environmental pollution, demonstrating promising application prospects.

[0093] The above technical features constitute various embodiments of this utility model, 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 horizontal descaling tank, characterized in that... The system includes a tank, a stirring assembly, a scale-collecting assembly, and a storage tank. A baffle plate is fixedly installed on the inner side of the tank, forming a flow channel between the lower side of the baffle plate and the lower inner side of the tank. A stirring assembly is located in the tank to the left of the baffle plate, and a scale-collecting assembly for collecting scale-forming ions in the extracted water is located in the tank to the right of the baffle plate. An inlet, a seed inlet, and an oil outlet are spaced apart on the outer side of the tank to the left of the baffle plate. A seed inlet pipeline is fixedly connected between the outlet of the storage tank and the seed inlet. An outlet is located on the upper outer side of the tank to the right of the baffle plate. The scale-collecting assembly includes a flow mechanism and a heater. A flow chamber is located on the inner right side of the tank, and several flow mechanisms are arranged parallel to each other at intervals within the flow chamber. A heater is located within each flow mechanism.

2. The horizontal descaling tank according to claim 1, characterized in that... The scale-collecting assembly also includes an adsorption shell and a magnet. The tank includes a left end cap, a tank body, and a right end cap that are detachably and fixedly installed together from left to right. The water inlet is located on the upper outer side of the left end cap. The seed inlet and oil outlet are spaced apart on the upper left side of the tank body. A sealing plate is fixedly installed on the inner side of the left end of the right end cap. A fixing plate is located on the inner side of the right end of the tank body corresponding to the left side of the sealing plate. Several adsorption shells fitted into the inner right side of the tank body are fixedly installed on the left side of the fixing plate along the circumference. The lower left side of the uppermost adsorption shell is fixedly installed together with the upper side of the baffle plate. A magnet is installed inside the adsorption shell. The adsorption shell, the left side of the fixing plate, and the right side of the baffle plate form a flow chamber. The water outlet is located on the upper outer side of the right end cap. A connecting hole extending from the left end to the left side of the fixing plate is provided on the upper right side of the sealing plate.

3. The horizontal descaling tank according to claim 2, characterized in that... The flow mechanism includes a corrugated plate, and several pairs of guide rails are provided on the inner wall of the flow chamber. Each pair of guide rails is equipped with a corrugated plate that is inclined upward on the right side relative to the left side. The corrugated plate includes several corrugated plates fixed together, and several heaters are arranged at intervals between two corrugated plates of each corrugated plate.

4. The horizontal descaling tank according to claim 3, characterized in that... The corrugated plate also includes a fixing frame, the upper right and lower right sides of which are slidably mounted on the left side of a pair of guide rails in the front-back direction, and the inner side of the fixing frame is fixedly mounted together with the outer side of the corrugated plate.

5. The horizontal descaling tank according to claim 3 or 4, characterized in that... The heater includes an electric heating rod and a sleeve. Two sleeves are arranged at intervals between two of the two corrugated plates of each corrugated plate, and each sleeve contains an electric heating rod.

6. The horizontal descaling tank according to claim 2, 3, or 4, characterized in that... The upper inner wall of the tank body corresponding to the position above the adsorption shell is provided with a closed upper chamber, and several pairs of upper pulleys are arranged at intervals on the left and right sides of the upper chamber. The lower inner wall of the tank body corresponding to the position below the adsorption shell is provided with a closed lower chamber, and several pairs of lower pulleys are arranged at intervals on the left and right sides of the lower chamber. Or / and, it also includes a drain tank. The lower right side of the adsorption shell is provided with a drain hole that communicates with the right side of the flow chamber. A drain pipe with a sealed lower end that passes through the tank body is fixedly connected to the outside of the adsorption shell corresponding to the position of the drain hole. The lower end of the drain pipe is fixedly connected to the inlet of the drain tank. A drain valve is installed on the drain pipe.

7. The horizontal descaling tank according to claim 5, characterized in that... The upper inner wall of the tank body corresponding to the position above the adsorption shell is provided with a closed upper chamber, and several pairs of upper pulleys are arranged at intervals on the left and right sides of the upper chamber. The lower inner wall of the tank body corresponding to the position below the adsorption shell is provided with a closed lower chamber, and several pairs of lower pulleys are arranged at intervals on the left and right sides of the lower chamber. Or / and, it also includes a drain tank. The lower right side of the adsorption shell is provided with a drain hole that communicates with the right side of the flow chamber. A drain pipe with a sealed lower end that passes through the tank body is fixedly connected to the outside of the adsorption shell corresponding to the position of the drain hole. The lower end of the drain pipe is fixedly connected to the inlet of the drain tank. A drain valve is installed on the drain pipe.

8. The horizontal descaling tank according to claim 2, 3, 4, or 7, characterized in that... The stirring assembly includes a stirring motor and stirring blades. The stirring motor is fixedly installed on the left side of the middle part of the left end cap. A stirring shaft is provided on the inner side of the left part of the tank body corresponding to the left side of the baffle plate. Several stirring blades are arranged at intervals on the outer side of the stirring shaft. The left end of the stirring shaft passes through the left end cap and is connected to the right end of the output shaft of the stirring motor. A magnetic seed inlet is fixed on the inner side of the tank body corresponding to the seed inlet position, located above the stirring blades. The magnetic seed inlet is tapered, with a smaller top and a larger bottom. The assembly also includes a control module and a dosing pump. A first liquid level sensor is provided on the left side of the tank body, and a second liquid level sensor is provided inside the storage tank. The upper end of the seeding pipeline is fixedly connected to the outlet of the dosing pump, and the inlet of the dosing pump is fixedly connected to the outlet of the storage tank. A first flow meter, a first pressure gauge, and a first control valve are installed sequentially along the flow direction of the medium on the seeding pipeline. The first liquid level sensor, the first flow meter, and the first control valve are all connected to the control module.

9. The horizontal descaling tank according to claim 5, characterized in that... The stirring assembly includes a stirring motor and stirring blades. The stirring motor is fixedly installed on the left side of the middle part of the left end cap. A stirring shaft is provided on the inner side of the left part of the tank body corresponding to the left side of the baffle plate. Several stirring blades are arranged at intervals on the outer side of the stirring shaft. The left end of the stirring shaft passes through the left end cap and is connected to the right end of the output shaft of the stirring motor. A magnetic seed inlet is fixed on the inner side of the tank body corresponding to the seed inlet position, located above the stirring blades. The magnetic seed inlet is tapered, with a smaller top and a larger bottom. The assembly also includes a control module and a dosing pump. A first liquid level sensor is provided on the left side of the tank body, and a second liquid level sensor is provided inside the storage tank. The upper end of the seeding pipeline is fixedly connected to the outlet of the dosing pump, and the inlet of the dosing pump is fixedly connected to the outlet of the storage tank. A first flow meter, a first pressure gauge, and a first control valve are installed sequentially along the flow direction of the medium on the seeding pipeline. The first liquid level sensor, the first flow meter, and the first control valve are all connected to the control module.

10. The horizontal descaling tank according to claim 6, characterized in that... The stirring assembly includes a stirring motor and stirring blades. The stirring motor is fixedly installed on the left side of the middle part of the left end cap. A stirring shaft is provided on the inner side of the left part of the tank body corresponding to the left side of the baffle plate. Several stirring blades are arranged at intervals on the outer side of the stirring shaft. The left end of the stirring shaft passes through the left end cap and is connected to the right end of the output shaft of the stirring motor. A magnetic seed inlet is fixed on the inner side of the tank body corresponding to the seed inlet position, located above the stirring blades. The magnetic seed inlet is tapered, with a smaller top and a larger bottom. The assembly also includes a control module and a dosing pump. A first liquid level sensor is provided on the left side of the tank body, and a second liquid level sensor is provided inside the storage tank. The upper end of the seeding pipeline is fixedly connected to the outlet of the dosing pump, and the inlet of the dosing pump is fixedly connected to the outlet of the storage tank. A first flow meter, a first pressure gauge, and a first control valve are installed sequentially along the flow direction of the medium on the seeding pipeline. The first liquid level sensor, the first flow meter, and the first control valve are all connected to the control module.

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