An adaptive axial flow mixer for treating oilfield chemical production waste liquid

Abstract

This invention relates to an adaptive axial flow mixer for treating waste liquid from oilfield chemical production. It includes an inlet pipe head, an outlet pipe head connected to a pre-flow buffer that releases flow and pressure pulses during the input of the waste liquid, and an adaptive feed pipe head connected to the outlet of the pre-flow buffer that adapts to changes in the operating conditions of the pre-flow buffer to introduce reactants into the waste liquid at a fixed ratio. The outlet of the adaptive feed pipe head is also connected to an axial flow mixer, and the outlet of the axial flow mixer head is connected to an outlet pipe head that outputs the mixed liquid. A follow-flow feeder assembly is provided on the outside of the pre-flow buffer that adjusts the reactant input pressure to the adaptive feed pipe head based on its slow-release deformation. A reset balancing mechanism, linked to the pre-flow buffer and limiting its initial position, is also provided on the outside of the adaptive feed pipe head.

Description

Technical Field

[0001] This invention relates to the field of oilfield chemical production equipment technology, and in particular to an adaptive axial flow mixer for treating waste liquid from oilfield chemical production. Background Technology

[0002] Oilfield chemicals, also known as oilfield chemical agents, refer to the agents used in oilfield drilling, well completion, oil production, water injection, enhanced oil recovery, and gathering and transportation processes. Oilfield chemicals are diverse and can be classified in various ways. According to the oilfield chemical agent type code standard used in China's petroleum and natural gas industry, oilfield chemicals can be divided into six categories: general chemicals, drilling chemicals, oil and gas development chemicals, enhanced oil recovery chemicals, oil and gas gathering and transportation chemicals, and water treatment chemicals. As a field of fine chemicals, oilfield chemicals are experiencing rapid growth due to the rapid development of high technology in the modern oilfield industry, which places increasingly higher demands on the performance and quality of oilfield chemicals. The growth momentum of oilfield chemical demand mainly comes from oil well drilling and enhanced oil recovery, with these two areas expected to grow rapidly at an average annual rate of 9.7% and 6.5% respectively; thus, the global oilfield chemical market demand is showing strong growth.

[0003] Oilfield chemicals will be widely used in the drilling process. In this process, drilling fluids are added to drilling mud to stabilize the rock. These fluids contain various chemical additives to ensure they are not absorbed by the formation, thus making the drilling process efficient. The growing demand for advanced drilling fluids, coupled with the increasingly longer shelf lives of these chemicals, is a key driver of the oilfield chemicals market. The expansion of the oil and gas industry, increased exploration and production activities, and advancements in drilling technology will drive the growth of the oilfield chemicals market during the forecast period.

[0004] Currently, oilfield chemical production processes generate solid waste, liquid waste, and gas waste. Liquid waste requires treatment to meet standards before discharge. This treatment involves mixing neutralizing agents, flocculants, and other reactants into the waste liquid in a specific ratio according to its flow rate to ensure optimal treatment results. However, traditional mixing of flocculants and other reactants with waste liquids widely utilizes stirred tanks (such as paddle and frame mixers), primarily relying on mechanical agitation. The working principle involves the rotating impeller driven by a power unit, causing simultaneous axial and radial motion of the material, resulting in shearing and diffusion mixing effects. This method suffers from drawbacks: intermittent mixing, unsuitable for continuous flow processing; difficulty in precisely controlling agitation intensity, with excessive agitation potentially leading to floc breakage; sensitivity to flow rate fluctuations requiring frequent adjustments to agitation parameters; large footprint; high maintenance costs; and relatively high energy consumption. Therefore, some companies have begun developing flow-guided mixing devices that can achieve mixing of flocculants with waste liquids during transport. However, most existing mixing devices using such diversion pipelines provide fixed-opening, quantitative feeding, which cannot adaptively adjust the amount of reactant added based on fluctuations in the flow rate and pressure of the input waste liquid. This easily leads to problems of excessive or insufficient reactant addition, thus affecting the final effect of waste liquid treatment. At the same time, some devices that can adjust the feeding amount require additional electronic flow sensors and control systems for auxiliary adjustment, resulting in a complex overall structure, higher equipment and maintenance costs, and a tendency for sensor monitoring data drift to reduce adjustment accuracy, which also increases energy consumption. They cannot meet the low-cost and stable operation requirements of oilfield chemical production enterprises and have poor applicability in production waste liquid treatment scenarios. Summary of the Invention

[0005] The purpose of this invention is to provide an adaptive axial flow mixer for treating oilfield chemical production wastewater that can adaptively adjust the amount of reactant added based on the flow and pressure fluctuations of the wastewater input without the need for electronic sensing and control systems. This solves the problems of existing pipeline mixing devices being unable to adapt to flow and pressure fluctuations and relying on complex and costly electronic control systems.

[0006] The technical solution adopted in this invention is as follows: an adaptive axial flow mixer for treating waste liquid from oilfield chemical production, comprising an inlet pipe head, an output end of which is connected to a pre-flow slowing pipe capable of slowly releasing flow and pressure pulses during the input process of the waste liquid flow, an adaptive feeding pipe capable of adaptively mixing reactants into the waste liquid flow in a fixed proportion according to the working condition changes of the pre-flow slowing pipe, and an axial flow mixing pipe connected to the output end of the adaptive feeding pipe, the output end of which is connected to an outlet pipe head for outputting the mixed liquid flow, wherein, a follow-flow feeder component is provided on the outside of the pre-flow slowing pipe capable of dynamically adjusting the liquid flow pressure of the reactants input to the adaptive feeding pipe according to the slow-release deformation it undergoes, and a reset balancing mechanism is provided on the outside of the adaptive feeding pipe, which is linked to the pre-flow slowing pipe and limits its initial working position. Its advantages lie in absorbing the pressure and flow pulses of the input waste liquid through the pre-positioned slow-flow fitting, while converting the waste liquid flow fluctuations into a usable slow-release structural deformation signal. There is no need to set up additional electronic flow and pressure sensors and corresponding electronic control adjustment units. The amount of reactant added can be adaptively adjusted proportionally according to the flow rate of the input waste liquid by relying solely on mechanical linkage. This avoids the impact of excessive or insufficient addition of reactant on the waste liquid treatment effect, simplifies the overall structure, reduces equipment costs and subsequent maintenance costs, and avoids the problem of reduced adjustment accuracy caused by the drift of electronic sensing components. It can meet the low-cost operation requirements of continuous and stable waste liquid treatment in oilfield chemical production enterprises.

[0007] According to a preferred embodiment, the pre-flow buffer includes a rigid outer cylinder shell, a rubber inner cylinder shell, a slow-release guide tube head, and a limiting sealing ring. The slow-release guide tube heads are coaxially inserted at both ends of the rubber inner cylinder shell, and a limiting sealing ring is fitted radially outwardly to the slow-release guide tube head to clamp and limit the rubber inner cylinder shell. A rigid outer cylinder shell, coaxially arranged with the rubber inner cylinder shell and jointly defining the annular gas cavity, is also fitted onto the rubber inner cylinder shell, and the radially outer annular surface of the limiting sealing ring is connected to the end face of the rigid outer cylinder shell. Its advantage is that when the input waste liquid flow rate increases and the pressure rises, the high-pressure waste liquid will squeeze the elastic rubber inner cylinder shell, causing it to expand and deform, squeezing out the gas in the annular gas cavity. This converts the pressure and flow rate changes of the waste liquid into gas pressure changes. Simultaneously, the expansion and deformation of the rubber inner cylinder shell itself can buffer and absorb the pressure pulse brought by the waste liquid flow rate, avoiding subsequent mixing imbalance caused by instantaneous flow impact.

[0008] According to a preferred embodiment, a first air-guiding connecting pipe head and a second air-guiding connecting pipe head arranged in alignment are also inserted on the outer wall of the rigid outer cylinder shell; a plurality of third air-guiding connecting pipe heads are also inserted circumferentially at intervals on the annular surface of the limiting sealing ring.

[0009] According to a preferred embodiment, a first flow-regulating inner shell and a second flow-regulating inner shell are slidably disposed within the variable-volume manifold shell of the adaptive feeding fitting, capable of sliding axially and conforming to the inner wall of the shell cavity. The first and second flow-regulating inner shells are coaxially connected in series. Thus, when the first flow-regulating inner shell undergoes axial translation, the mixing chamber jointly defined by it and the upper section of the variable-volume manifold shell adapts to accommodate the waste liquid flow and reactant that can converge and whose flow rate changes in real time within the mixing chamber, in a manner that synchronizes volume changes. Its advantage is that when the input waste liquid flow rate increases, causing the mixing chamber to need to accommodate a larger volume of mixed liquid flow, the volume of the mixing chamber expands synchronously with the axial translation of the first flow-regulating inner shell, and conversely, shrinks synchronously. This allows it to always adapt to the real-time volume changes of the input waste liquid flow, maintaining the axial flow continuity of the mixing process, avoiding pressure buildup or insufficient supply in the mixing chamber due to flow fluctuations, and ensuring a stable and continuous mixing process.

[0010] According to a preferred embodiment, the variable-capacity manifold shell has a plurality of through-flow guide holes spaced circumferentially on its shell wall, and the first flow-regulating inner shell also has through-flow guide grooves on its shell wall that communicate with the through-flow guide holes and adjustably limit the exposed area of ​​the output port of the through-flow guide holes during the axial translation of the first flow-regulating inner shell. Its advantage is that when the first flow-regulating inner shell is axially translated, the communication area between the through-flow guide grooves and the through-flow guide holes changes synchronously: when the input waste liquid flow rate increases, the axial movement of the first flow-regulating inner shell exposes more of the through-flow guide holes, increasing the flow rate of the reactant into the mixing chamber; conversely, it reduces the exposed area, decreasing the reactant flow rate. This allows the reactant flow rate to change synchronously with the waste liquid flow rate without additional electronic control adjustment, ensuring the accuracy of the constant-ratio mixing.

[0011] According to a preferred embodiment, the reset balancing mechanism includes a balancing tube disposed on the outer side of the variable capacity manifold shell and communicating with the third gas guide pipe head, a balancing piston body slidably embedded in the balancing tube, and a linkage push-pull rod connected to the balancing piston body and slidably passing through the bottom end of the balancing tube, wherein the linkage push-pull rod extends to the lower axial end outside the balancing tube and is inserted into the variable capacity manifold shell and connected to the upper end face of the first flow regulating inner shell. Its advantage lies in the fact that when the input waste liquid flow rate increases, the rubber inner tube shell expands under pressure, and the gas in the annular gas chamber is squeezed into each balance tube, pushing the balance piston body to move downward against the reset trend. At the same time, the linkage push-pull rod drives the first flow-regulating inner tube shell to move axially, thereby expanding the volume of the mixing chamber and increasing the reactant passage area. Conversely, when the input waste liquid flow rate decreases, the rubber inner tube shell contracts, and the annular gas chamber forms a negative pressure, driving the balance piston body to reset upward. The linkage first flow-regulating inner tube shell moves in the opposite direction, reducing the volume of the mixing chamber and decreasing the reactant passage area. The entire process relies on mechanical linkage to achieve adaptive and proportional adjustment of the reactant addition amount according to the waste liquid flow rate, without the need for an additional electronic control unit. The adjustment response is stable and timely.

[0012] According to a preferred embodiment, a fourth gas guiding pipe head, which connects to the third gas guiding pipe head, is inserted into the upper axial end of the balance tube; several circumferentially spaced variable volume manifold shells are also connected to the bottom surface of their shell cavities via a common-pressure annular gas pipe. Its advantage lies in ensuring consistent gas pressure within each variable volume manifold shell, enabling synchronized movement of the balance piston bodies in all directions, preventing the first flow regulating inner shell from being misaligned or jammed due to uneven thrust, and ensuring the stability of the axial sliding of the first flow regulating inner shell.

[0013] According to a preferred embodiment, the in-flow feed assembly includes a flow guide ring housing fitted onto the variable volume manifold housing, a reactant output pipe head inserted into the radially inner annular surface of the flow guide ring housing and communicating with the through-flow guide hole, a reactant input pipe connected to the flow guide ring housing, a storage tank connected to the input end of the reactant input pipe, a variable frequency pressurized liquid pump installed on the reactant input pipe, and a power regulating mechanism that can dynamically adjust the real-time power of the variable frequency pressurized liquid pump. Its advantage lies in that when the input waste liquid flow rate increases, the pressure change output by the pre-flow buffer simultaneously drives the power regulating mechanism to increase the power of the variable frequency pressurized liquid pump, thereby increasing the reactant supply pressure. Combined with the increased reactant inlet area, this further matches the reactant dosage requirements of the large-flow waste liquid. Conversely, the output power of the variable frequency pressurized liquid pump is simultaneously reduced to decrease the reactant supply pressure, achieving dual proportional regulation, further improving the accuracy of reactant addition and avoiding deviations in proportional mixing.

[0014] According to a preferred embodiment, the power adjustment mechanism includes a mounting frame, a sliding rheostat unit mounted on the mounting frame and electrically connected to the variable frequency pressurized hydraulic pump, an adjustment linkage rod connected to the adjustment slide of the sliding rheostat unit, a first piston shell connected to the first air guide pipe head, and a first adjustment piston body slidably embedded in the piston shell and connected to one end of the adjustment linkage rod inserted into the first piston shell. Its advantages lie in the fact that when the input waste liquid flow rate increases, the rubber inner tube shell expands under pressure, causing the air pressure in the annular gas chamber to rise. This air pressure pushes the first adjusting piston to slide, which in turn drives the adjusting linkage rod to pull the adjusting slide of the sliding rheostat unit, reducing the resistance of the sliding rheostat unit connected to the circuit and increasing the working power of the frequency converter pressurizing pump, thereby increasing the reactant supply pressure. Conversely, when the input waste liquid flow rate decreases, the air pressure in the annular gas chamber decreases, and the first adjusting piston slides in the opposite direction, increasing the connected resistance and reducing the power of the frequency converter pressurizing pump. This achieves mechanical linkage adjustment of the reactant supply pressure according to the waste liquid flow rate, completing the dual ratio adjustment without the need for an additional electronic control sensor unit, ensuring the mixing ratio accuracy. At the same time, the overall structure is simple and reliable, reducing equipment maintenance costs.

[0015] According to a preferred embodiment, the two ends of the main pipe shell of the axial flow mixing pipe are integrally connected to a mixing inlet pipe and a mixing outlet pipe, respectively, which can be connected to the variable volume manifold shell and the liquid outlet pipe. The main pipe shell includes alternating spiral mixing pipes and flat mixing pipes connected in series. Its advantages are that the spiral mixing pipe guides the mixture along a spiral path, causing the waste liquid and reactant to continuously undergo axial collision and radial shearing under the spiral guidance, improving mixing uniformity; while the flat mixing pipe, with its increased flow cross-sectional width and reduced thickness, forces the liquid to further diffuse and mix laterally during thin-layer flow, preventing stratification of materials of different densities, enhancing the mixing effect in the axial flow process, and achieving uniform mixing during transportation without additional stirring, reducing overall energy consumption and meeting the needs of continuous waste liquid treatment.

[0016] The beneficial effects of this invention are: This application addresses the practical need for proportional mixing of reactants with waste liquid during the treatment of oilfield chemical production waste liquid. Through a mechanical linkage structure, fluctuations in the flow rate and pressure of the input waste liquid are directly converted into adaptive adjustments to the amount of reactant added and the volume of the mixing chamber. The entire process can achieve continuous proportional mixing of reactants and waste liquid without the intervention of electronic sensors and electrical control systems. This solves the problems of traditional stirred tank mixing, which cannot continuously process waste liquid and easily damages flocs. It also avoids the shortcomings of existing pipeline mixing devices, which rely on electrical control, have complex structures and high costs, and whose adjustment accuracy is easily affected by sensor drift. This application is suitable for the low-cost and stable treatment of waste liquid in oilfield chemical production enterprises.

[0017] This application buffers the flow and pressure pulses generated during the waste liquid input process using a pre-flow buffering pipe. Simultaneously, it utilizes the pressure change in the annular gas chamber after the pre-flow buffering pipe deforms under pressure to drive the follow-flow agent supply component and the reset balancing mechanism. This allows for automatic and continuous adjustment of the reactant input pressure based on real-time flow fluctuations in the waste liquid. Simultaneously, it adjusts the effective volume of the mixing chamber in the adaptive feeding pipe, as well as the cross-section of the reactant input channel and the cross-section of the mixed liquid output guide channel, ensuring precise mixing of the reactant and waste liquid according to a preset ratio. The entire adjustment process is based entirely on the coupled response of fluid mechanics and structural mechanics, eliminating the need for additional electronic control components, sensors, or complex feedback control systems. This significantly simplifies the overall device design and greatly improves system reliability and anti-interference capabilities. Therefore, this application offers outstanding advantages such as simple structure, stable operation, low failure rate, and low maintenance costs. It is particularly suitable for industrial waste liquid treatment scenarios requiring long-term continuous operation, effectively supporting the efficient and stable operation of subsequent chemical or biological treatment units while ensuring mixing accuracy, ultimately ensuring the reliability and consistency of the overall waste liquid treatment effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a preferred adaptive axial flow mixer for treating oilfield chemical production waste liquid proposed in this invention; Figure 2 This is a schematic diagram of the axial cross section of a preferred adaptive axial flow mixer for treating oilfield chemical production waste liquid proposed in this invention. Figure 3 This is a cross-sectional schematic diagram of another partial section of a preferred adaptive axial flow mixer for treating oilfield chemical production waste liquid proposed in this invention; Figure 4 This is a schematic cross-sectional view of section AA of a preferred adaptive axial flow mixer for treating oilfield chemical production waste liquid proposed in this invention; Figure 5 This is a plan view of the stacked plan of the variable-capacity manifold shell and the first flow-regulating inner shell of a preferred adaptive axial flow mixer for treating oilfield chemical production waste liquid proposed in this invention, in the unfolded state. Figure 6 This is another partial cross-sectional view of the second flow regulating inner shell and the limiting sealing ring of a preferred adaptive axial flow mixer for treating oilfield chemical production waste liquid proposed in this invention.

[0019] List of reference numerals 1: Liquid inlet pipe; 2: Pre-flow slowing pipe; 3: Adaptive feeding pipe; 4: Axial flow mixing pipe; 5: Liquid outlet pipe; 6: Flow-following agent supply assembly; 7: Reset balancing mechanism; 8: Flow turbulence assembly; 21: Rigid outer cylinder shell; 22: Rubber inner cylinder shell; 23: Slow-release guide pipe; 24: Limiting sealing ring; 211: First gas guide connecting pipe; 212: Second gas guide connecting pipe; 241: Third... 31: Air guide connecting pipe head; 32: Variable volume manifold shell; 33: First flow regulating inner shell; 34: Flow regulating column; 311: Through flow guide hole; 321: Through flow guide groove; 322: Support rod; 323: Impact arc cone; 324: Flow diversion turbine; 331: Porous tube; 332: Buffer flow equalizer; 341: Positioning support crossbar; 41: Main pipe shell; 42: Mixing input 43: Mixing output pipe head; 411: Spiral mixing pipe; 412: Flat shell mixing pipe; 61: Flow guide ring shell; 62: Reactant output pipe head; 63: Reactant input pipe; 64: Storage tank; 65: Variable frequency pressurized liquid pump; 66: Power adjustment mechanism; 611: Porous flow equalization ring plate; 612: Anti-interference radial vertical plate; 661: Mounting frame; 662: Sliding variable resistance unit; 663: Adjustment linkage rod; 664: Piston cylinder shell; 665: First adjusting piston body; 71: Balance tube cylinder; 72: Balance piston body; 73: Linkage push-pull rod; 711: Fourth gas guide connecting pipe head; 712: Co-pressure annular gas pipe; 81: Turbulence column; 82: Positioning side frame; 83: Composite magnetic shielding guide tube; 84: Magnetic block; 85: Elastic limiter; 86: Electromagnet; 87: Two-position switch; 88: Opening and closing adjustment mechanism. Detailed Implementation

[0020] The following is a detailed explanation with reference to the accompanying drawings. Example

[0021] This application provides an adaptive axial flow mixer for treating waste liquid from oilfield chemical production, comprising an inlet pipe head 1, a pre-positioned slow-flow pipe 2, an adaptive feeding pipe 3, an axial flow mixing pipe 4, an outlet pipe head 5, a flow-following agent supply assembly 6, a reset and balancing mechanism 7, and a flow disturbance assembly 8.

[0022] according to Figures 1-6In one specific embodiment, the input end of the inlet pipe 1 is connected to the output end of the liquid flow drive pump via a liquid supply pipeline. The output end of the inlet pipe 1 is connected to a pre-flow buffer 2 capable of slowly releasing the flow and pressure pulses during the input of the waste liquid. An adaptive feed pipe 3 is also connected to the output end of the pre-flow buffer 2, capable of adaptively mixing reactant into the waste liquid in a fixed proportion according to changes in the operating conditions of the pre-flow buffer 2. The output end of the adaptive feed pipe 3 is also connected to an axial flow mixing pipe 4. The output end of the axial flow mixing pipe 4 is connected to an outlet pipe 5 that outputs the mixed liquid. The output end of the outlet pipe 5 is connected to a filtration device to separate flocculent matter and other substances precipitated in the waste liquid. A follow-flow feeder assembly 6 is also provided on the outside of the pre-flow buffer 2, capable of dynamically adjusting the liquid flow pressure of the reactant input to the adaptive feed pipe 3 based on its slow-release deformation. A reset balancing mechanism 7, which is linked to the pre-flow buffer fitting 2 and defines its initial position, is also provided on the outside of the adaptive feeding fitting 3. A flow-disrupting component 8, which agitates the directional flow of the mixed liquid within the axial flow mixing fitting 4, is also inserted into the axial flow casing 41 of the axial flow mixing fitting 4 in a manner that can be linked to changes in the operating conditions of the pre-flow buffer fitting 2. The pre-flow buffer fitting 2 of this application can effectively buffer flow and pressure pulses caused by uneven fluid flow or pumping fluctuations during waste liquid input, thereby significantly improving the operational stability of the entire system. When the pre-positioned slow-flow pipe 2 is subjected to the pressure of the waste liquid, it undergoes controllable elastic deformation. This deformation further causes a change in the volume of its internal annular gas chamber, leading to a corresponding change in the gas pressure within the chamber. This pressure change caused by physical deformation is cleverly used to drive the flow-following agent supply component 6 and the reset balancing mechanism 7. This allows for automatic and continuous adjustment of the reactant input pressure based on real-time fluctuations in the waste liquid flow rate. Simultaneously, it adjusts the effective volume of the mixing chamber in the adaptive feeding pipe, as well as the cross-section of the reactant input flow channel and the cross-section of the mixed liquid output guide channel. This ensures that the reactant and waste liquid are always precisely mixed according to a preset ratio. The entire adjustment process is based entirely on the coupled response of fluid mechanics and structural mechanics, eliminating the need for additional electronic control components, sensors, or complex feedback control systems. This significantly simplifies the overall structural design of the device and greatly improves the system's reliability and anti-interference capabilities. Therefore, this application has outstanding advantages such as simple structure, stable operation, low failure rate and low maintenance cost. It is particularly suitable for industrial waste liquid treatment scenarios that require long-term continuous operation. While ensuring mixing accuracy, it effectively supports the efficient and stable operation of subsequent chemical or biological treatment units, and ultimately ensures the reliability and consistency of the overall waste liquid treatment effect.

[0023] like Figure 2As shown, the pre-flow-slowing fitting 2 includes a rigid outer tube shell 21, a rubber inner tube shell 22, a slow-release guide tube head 23, and a limiting sealing ring 24. Preferably, the slow-release guide tube head 23 is coaxially inserted at both ends of the rubber inner tube shell 22. More preferably, a limiting sealing ring 24 is also fitted on the radially outer side of the slow-release guide tube head 23 to clamp and limit the rubber inner tube shell 22. Preferably, a rigid outer tube shell 21 is also fitted on the rubber inner tube shell 22, coaxially arranged with it and jointly defining the annular air cavity, and the radially outer annular surface of the limiting sealing ring 24 is connected to the end face of the rigid outer tube shell 21 to seal the axial openings at both ends of the rigid outer tube shell 21, thereby forming an annular air cavity with a closed chamber. The slow-release guide tube head 23 guides the waste liquid flow into and out of the inner layer guide channel defined by the rubber inner tube shell 22. When the flow rate of the waste liquid fluctuates, the rubber inner tube shell 22 is compressed and expands elastically, thereby buffering the flow pulse and pressure pulse. At the same time, the expansion of the rubber inner tube shell 22 will squeeze the annular air cavity, causing the air pressure inside the annular air cavity to increase. This air pressure change will be synchronously transmitted to the following agent supply component 6, the reset balance mechanism 7 and the turbulence component 8, triggering subsequent adaptive adjustment actions and disturbance to the directional flow of the mixed liquid.

[0024] Preferably, a first gas-conducting connecting pipe head 211 and a second gas-conducting connecting pipe head 212, arranged in alignment, are also inserted into the outer wall of the rigid outer cylinder shell 21. Preferably, a plurality of third gas-conducting connecting pipe heads 241 are also inserted circumferentially at intervals on the annular surface of the limiting sealing ring 24. Preferably, an air filling / draining port is also provided on the outer wall of the rigid outer cylinder shell 21. Specifically, the slow-release guiding pipe head 23 located on the input side of the rubber inner cylinder shell 22 is connected to the liquid inlet pipe head 1. Preferably, the slow-release guiding pipe head 23 located on the output side of the rubber inner cylinder shell 22 is connected to the input end of the variable volume manifold shell 31. Preferably, the axial ends of the rubber inner cylinder shell 22 are provided with radially inner annular ends that can be easily assembled and combined and effectively clamped and positioned by the slow-release guiding pipe head 23 and the limiting sealing ring 24. Preferably, the end of the slow-release guiding pipe head 23 is integrally connected to a flange. Preferably, the radial outer edge of the limiting sealing ring 24 is provided with an extended connecting cylinder shell. Preferably, sealing gaskets are embedded on the mating end faces of the limiting sealing ring 24 and the slow-release guide pipe head 23, so that when the two are connected by bolts and nuts, the sealing gaskets can fill the assembly gap when the two are mated. Specifically, circumferentially spaced bolt columns are pre-connected on the annular end face of the slow-release guide pipe head 23 by welding or integral molding, so that the relative assembly position of the two is limited by fitting nuts on the bolt columns. The rigid outer cylinder shell 21, the slow-release guide pipe head 23 and the limiting sealing ring 24 are made of stainless steel, with high structural strength, not easily corroded by oilfield production waste liquid, long service life and adaptable to complex waste liquid treatment scenarios. The rubber inner cylinder shell 22 is made of oil-resistant rubber integrally molded, with good elastic deformation ability and corrosion resistance, can maintain stable elastic buffering performance in the oilfield waste liquid environment for a long time, is not prone to aging failure, and reduces the frequency of daily maintenance and replacement.

[0025] Preferably, a first flow-regulating inner shell 32 and a second flow-regulating inner shell 33 are slidably disposed within the variable-volume manifold shell 31 of the adaptive feeding pipe fitting 3, capable of sliding along its axial direction and conforming to the inner wall of its cavity. Preferably, the first flow-regulating inner shell 32 and the second flow-regulating inner shell 33 are coaxially connected in series in a manner that forms a flow guiding channel. When the first flow-regulating inner shell 32 undergoes axial translation, the mixing chamber jointly defined by the first flow-regulating inner shell 32 and the upper section of the variable-volume manifold shell 31 adaptably accommodates the waste liquid flow and reactant that can converge and whose flow rate changes in real time within the mixing chamber in a manner that synchronously changes in volume. This is to buffer the waste liquid flow and reactant with variable volume, reduce the flow rate fluctuation of the output mixed liquid flow, and enable the mixed liquid flow to flow smoothly in the axial flow mixing pipe fitting 4 and undergo fusion mixing, ensuring the uniformity of the flow duration and mixing effect of the mixed liquid flow in the axial flow mixing pipe fitting 4. Specifically, the first flow-regulating inner shell 32 can move axially downward under the impact of the increased pressure of the waste liquid flow, increasing the distance between the bottom surface of its inner chamber and the top surface of the inner chamber of the variable-volume manifold shell 31. This increases the volume of the mixing chamber jointly constructed by the two, allowing the increased pressure and flow rate of the waste liquid flow and the reactant to achieve a pressure reduction after mixing due to the increased volume of the mixing chamber, ensuring a stable output mixed liquid flow pressure. When the waste liquid flow pressure decreases, the reset balancing mechanism pushes the first flow-regulating inner shell upward, reducing the volume of the mixing chamber and increasing the output liquid flow pressure, ensuring a stable output flow rate. Preferably, a flow-regulating column 34, capable of changing the size of the guide cross-section of the output port of the second flow-regulating inner shell 33, is centrally located in the lower section of the variable-volume manifold shell 31. The flow regulating column 34, in coordination with the second flow regulating inner shell 33, partially blocks and fills the outlet of the cavity of the vertically moving inner flow regulating shell 33, thereby limiting the real-time flow rate of the mixed liquid output from the adaptive feeding fitting 3. Furthermore, as the second flow regulating inner shell 33 moves up and down along with the first flow regulating inner shell 32, the flow regulating column 34 can be at least partially inserted into the output port at the lower axial end of the second flow regulating inner shell 33. This changes the conductive cross-sectional area of ​​the output port of the second flow regulating inner shell 33. Therefore, when the hydraulic pressure of the waste liquid increases and the input flow velocity increases, the downward-moving second flow regulating inner shell 33 allows more of the conical flow regulating column 34 to be inserted into its output port, reducing the conductive cross-sectional area of ​​the output port. This achieves reverse compensation for the increased flow velocity, further improving the stability of the real-time flow rate of the output mixed liquid, preventing large fluctuations in output flow rate synchronously with input flow rate, and ensuring the stability of subsequent mixing operations.

[0026] like Figure 2 , Figure 4 and Figure 5As shown, a plurality of through-flow guide holes 311 are circumferentially spaced on the shell wall of the variable-capacity manifold shell 31. More preferably, a through-flow guide groove 321, communicating with the through-flow guide holes 311 and limiting the exposed area of ​​the output port of the through-flow guide holes 311, is also formed on the shell wall of the first flow regulating inner shell 32. Preferably, the through-flow guide groove 321 expands its width from bottom to top along the axial direction of the first flow regulating inner shell 32 in a manner that allows it to selectively partially obstruct the end face of the through-flow guide hole 311 during axial translation, thereby changing the cross-sectional size of the reactant input channel. The cross-sectional size of the reactant input channel refers to the conductive cross-sectional size of the unobstructed portion of the through-flow guide hole 311. The through-flow guide groove 321 is a strip-shaped through-flow groove that is wider at the top and narrower at the bottom. The width of the lower section of the groove is smaller than the cross-sectional radius of the through-flow guide hole 311, and the width of the upper section of the groove is greater than or equal to the cross-sectional radius of the through-flow guide hole 311. More preferably, the cavity of the through-flow guide groove 321 is not radially vertically opened, but rather inclined at an angle to the radial direction, causing the reactant output through it to deviate from the central axis of the variable volume manifold shell 31. When the pressure of the input waste liquid increases, forcing the first flow regulating inner shell 32 to move downward, the cross-sectional area of ​​the cavity of the through-flow guide hole 311 exposed in the through-flow guide groove 321 increases, thereby limiting the size of the conduction cross-section at the connection position between the minimum cross-section of the reactant input flow channel, the through-flow guide hole 311, and the through-flow guide groove 321. This allows the reactant to increase its flow channel cross-section as the input pressure and flow velocity of the waste liquid increase, thus enabling the real-time flow rate of the reactant to be synchronously adjusted with the real-time flow rate of the waste liquid, maintaining stable mixing ratio accuracy without the need for an additional electrical control system. When the pressure of the input waste liquid decreases, the first regulating inner tube shell 32 moves upward under the action of the reset balancing mechanism 7, and the cross-sectional area of ​​the through guide groove 321 exposed to the through guide hole 311 decreases synchronously. The input flow rate of the reactant decreases proportionally, thereby always maintaining the preset mixing ratio of the reactant and the waste liquid.

[0027] Preferably, an impact cone 323, which can be driven by a directionally input and fluctuating flow of waste liquid, is supported on the bottom annular surface of the first flow regulating inner shell 32 by circumferentially spaced support rods 322. Preferably, a diversion turbine 324, which can be driven by the injected reactant and directionally discharged outward, is also rotatably connected to the bottom surface of the impact cone 323. Specifically, the conical slope of the impact cone 323 is set as an arc surface, so that it can more efficiently bear the impact force of the liquid flow when the waste liquid is input, drive the first flow regulating inner shell 322 to move axially synchronously, realize the rapid conversion of flow change into flow regulation action, and improve the response speed of adaptive adjustment. The diversion turbine 324 can promote the liquid flow that has undergone preliminary mixing in the mixing chamber to flow downward under the push of the reactant, and drive the preliminary mixed waste liquid and reactant to generate swirling flow during rotation, so that the two are initially mixed before entering the second flow regulating inner shell, improving the overall mixing uniformity.

[0028] Preferably, the second flow regulating inner shell 33 is a tube with a polygonal cross-sectional outline. Preferably, the inner cross-section of the lower section of the variable-capacity manifold shell 31, which is fitted onto the second flow regulating inner shell 33, is also a polygonal shape that matches the second flow regulating inner shell 33. This allows the second flow regulating inner shell 33 to limit the axial translation direction of the first flow regulating inner shell 32, preventing rotation around the axis during axial translation. The lower axial end of the second flow regulating inner shell 33 may have a gradually expanding axial guide channel, enabling it to better cooperate with the flow regulating column 34 to balance and regulate the output flow. The second flow regulating inner shell 33 is integrally connected to the first flow regulating inner shell 32 by welding or other methods. The two are assembled as a whole using a coaxial synchronous lifting method, allowing them to synchronously adjust their position following the impact of the waste liquid flow. This ensures that the flow ratio adjustment and output flow smoothness adjustment actions are triggered synchronously, further improving the consistency of adaptive regulation. Sealing rings can also be nested on the outer walls of the first flow regulating inner shell 32 and the second flow regulating inner shell 33, so that the two can fill the assembly gap while sliding axially in the variable volume manifold shell 31, preventing the reactant from leaking through the assembly gap, ensuring the airtightness of the liquid flow regulation process, and preventing oilfield waste liquid leakage from causing environmental pollution.

[0029] Preferably, the flow regulating column 34 is connected to the inner wall of the variable capacity manifold shell 31 via positioning support crossbars 341 arranged circumferentially on its sidewall. Preferably, the top of the flow regulating column 34 is a cone shape capable of variablely blocking the output port of the second flow regulating inner shell 33 to reduce its flow guiding cross-section. The bottom end of the flow regulating column 34 is integrally connected to the positioning support crossbars 341, and the other end of the positioning support crossbars 341 is welded and fixed to the inner wall of the variable capacity manifold shell 31. This structure is stable and will not shift position under liquid flow impact, ensuring the accuracy and stability of the flow regulation process. The flow regulating column 34 has a conical structure with the cone tip facing upwards, facilitating the insertion of the second flow regulating inner shell 33 as it moves downwards. The cone tip and body work together to gradually increase the blocking area on the output port of the second flow regulating inner shell 33. The change in blocking area corresponds linearly to the downward movement distance of the second flow regulating inner shell 33, ensuring the accuracy of output flow regulation. The flow regulating column 34 is made entirely of stainless steel with a passivated anti-corrosion treatment. Its high structural strength ensures it maintains structural precision and stability in oilfield wastewater environments, resisting corrosion and deformation, thus guaranteeing long-term stable operation. The linear change in the cone head and body's coverage area at the output port, combined with volume changes in the mixing chamber, creates a synergistic regulating effect. When the waste liquid input flow rate increases, it expands the mixing chamber volume to buffer the flow pressure while simultaneously limiting the output flow rate by reducing the output port cross-sectional area. This dual regulation effectively smooths out flow rate fluctuations, maintaining a stable output flow rate and providing stable flow conditions for subsequent axial flow mixing operations. Furthermore, the synchronous proportional adjustment of the reactant input flow rate via the through-flow guide groove enables precise mixing of reactants and waste liquid through a fully mechanical structure without additional electrical control equipment. This results in higher equipment reliability, lower maintenance costs, and better suitability for the complex and harsh operating environment of oilfields.

[0030] Preferably, the two ends of the main pipe shell 41 of the axial flow mixing pipe fitting 4 are integrally connected to a mixing inlet pipe head 42 and a mixing outlet pipe head 43, which can respectively connect to the variable volume manifold shell 31 and the liquid outlet pipe head 5. Preferably, the main pipe shell 41 includes alternating spiral mixing pipes 411 and flat mixing pipes 412 connected in series. More preferably, the side of the flat mixing pipe 412 is equipped with a flow-dispersing component 8 that can be inserted into its cavity. Specifically, the side of the flat mixing pipe 412 has several through-holes that match the cross-section of the flow-dispersing column 81 in a staggered array, and a sealing gasket that fills the assembly gap is embedded in the through-holes. Preferably, the flow-dispersing column 81 of the flow-dispersing component 8 is inserted into the flat mixing pipe 412 in a staggered array and can slide axially to selectively move into or out of the flat mixing pipe 412. The spiral mixing pipe 411 and the flat-shell mixing pipe 412 alternately cut and mix the axially flowed liquid stream through different flow direction changes. The flat-shell mixing pipe 412 allows the input liquid stream to flow through the flat-shaped cavity with abrupt cross-section changes, resulting in flow direction extension and cutting. Combined with the obstruction and cutting formed by the staggered distribution of flow-dispersing columns 81 inserted into the cavity, the liquid stream undergoes multiple splitting and converging within the flat-shaped cavity, accelerating the relative movement between liquid molecules. Then, the spiral mixing pipe 411 guides the liquid stream forward in a spiral, causing the liquid streams of different components to continuously tumble and exchange during the spiral flow, thereby changing the flow direction and velocity of the liquid stream multiple times, breaking the laminar and stratified state of the liquid stream, and improving the overall mixing uniformity.

[0031] Preferably, the flat-shell mixing pipe 412 is provided with shaped pipe joints at both ends, which are sealed and connected to the adjacent spiral mixing pipe 411. The shaped pipe joints can gradually guide the liquid flow from the spiral mixing pipe with a circular cross-section to the flat-shell mixing pipe with a flat cross-section, avoiding sudden changes in liquid flow pressure caused by abrupt changes in cross-section and reducing pressure loss during liquid flow transportation. Spiral guide vanes are provided in the cylindrical cavity of the spiral mixing pipe 411 by welding or other methods. The spiral guide vanes extend spirally along the axial direction of the spiral mixing pipe 411, which can limit the axial flow of the mixed liquid to a liquid flow that spirals forward along the surface of the vanes, guide the liquid flow to continuously tumble, and carry out spiral transportation, further enhancing the exchange and mixing between different component liquid flows and improving the mixing uniformity.

[0032] like Figure 2 As shown, the flow-fed agent supply assembly 6 includes a flow guide ring shell 61 fitted on the variable volume manifold shell 31, a reactant output pipe head 62 inserted into the radial inner ring surface of the flow guide ring shell 61 and communicating with the through flow guide hole 311, a reactant input pipe 63 connected to the flow guide ring shell 61, a storage tank 64 connected to the input end of the reactant input pipe 63, a variable frequency pressurized liquid pump 65 installed on the reactant input pipe 63, and a power adjustment mechanism 66 for adjusting the real-time power of the variable frequency pressurized liquid pump 65.

[0033] More preferably, the variable frequency pressurized liquid pump 65 connects its inlet and outlet ports to the storage tank 64 and the guide ring shell 61 respectively, in a manner that the reactant in the drive storage tank 64 is pressurized and input into the guide ring shell 61 via the reactant input pipe 63. The power adjustment mechanism 66 can move its position according to the pressure change of the annular gas chamber defined by the pre-positioned slow-flow pipe 2, thereby adjusting the resistance of the electrical circuit in which the variable frequency pressurized liquid pump 65 is located and changing its operating voltage. This allows the variable frequency pressurized liquid pump 65 to provide different magnitudes of reactant liquid flow driving force in a coordinated manner according to the changes in the power adjustment mechanism 66. Thus, when the waste liquid flow fluctuates, the size of the conduction cross section of the reactant input channel changes, and the variable frequency pressurized liquid pump 65 synchronously changes its real-time flow rate of driving the reactant input to ensure that the reactant has approximately equal flow velocity when the output port changes. This allows the reactant to maintain a preset mixing ratio with the fluctuating waste liquid flow, further improving the control accuracy of the mixing ratio. When the input flow rate of the waste liquid increases, the annular gas chamber in the pre-flow buffer 2 is squeezed by the pressure of the waste liquid flow. The increased chamber pressure pushes the moving contact of the power adjustment mechanism 66 to move, reducing the resistance of the electrical circuit of the variable frequency pressurized pump 65, increasing the working power of the variable frequency pressurized pump 65, and increasing the output pressure of the reactant. This offsets the pressure drop change in the pipeline after the increase in the cross-sectional area of ​​the reactant input channel, ensuring a stable reactant input flow rate. Conversely, when the input flow rate of the waste liquid decreases, the pressure in the annular gas chamber decreases, the moving contact moves in the opposite direction, increasing the resistance of the electrical circuit, reducing the working power of the variable frequency pressurized pump 65, and reducing the reactant output pressure. This also maintains a stable reactant input flow rate. Combined with the adaptive adjustment of the flow channel cross-section of the fully mechanical structure, this provides double assurance for the accuracy and stability of the mixing ratio.

[0034] Preferably, the inlet end of the reactant output pipe head 62 is equipped with a one-way liquid guide valve and a pressure-operating valve, which ensures that it only opens for output when the reactant pressure in the guide ring shell 61 reaches a preset value. This prevents reactant leakage during non-operational periods and also prevents waste liquid from seeping back into the guide ring shell 61 and causing pipeline blockage, thus ensuring the long-term stable operation of the reactant supply pipeline. The circumferentially spaced reactant output pipe heads 62, each corresponding to a through-flow guide hole 311, can evenly deliver the reactant in the guide ring shell to each through-flow guide hole 311, ensuring uniform reactant flow at different locations and avoiding uneven flow in different channels that could lead to mixing ratio deviations, further improving the overall mixing ratio uniformity. The reactant output pipe head 62 and the guide ring shell 61 are integrally cast, with reinforced sealing at the connection point to prevent high-pressure reactant leakage and ensure structural sealing performance and operational stability.

[0035] Preferably, a porous flow equalization ring plate 611 is provided in the annular cavity of the flow guide ring shell 61, located between the inner diameter annular surface and the outer diameter annular surface. More preferably, anti-interference radial vertical plates 612 are also arranged circumferentially on the radially inner shell wall of the flow guide ring shell 61 to separate the liquid filling space on the inlet side of several reactant outlet pipe heads 62. Preferably, several flow equalization through holes are arrayed on the plate body of the porous flow equalization ring plate 611, which gradually expand and increase in size in the direction away from the reactant inlet pipe 63. The porous flow equalization ring plate 611 is welded and fixed to the inner wall of the flow guide ring shell 61 via multiple connecting legs. It can initially disperse and equalize the high-pressure reactant input through the reactant inlet pipe, ensuring uniform reactant pressure at different locations within the ring chamber. The progressively expanding flow equalization through holes can offset pressure loss along the reactant flow path, ensuring that the reactant pressure far from the reactant inlet pipe remains consistent with that near the inlet pipe, thus preventing flow deviations in the reactant output pipes caused by uneven reactant pressure in different areas. The anti-interference radial vertical plate divides the ring chamber into multiple independent filling zones, each corresponding to a reactant output pipe, preventing pressure disturbances and cross-flow between different zones. This ensures stable input pressure for each reactant output pipe, further improving flow consistency across output channels. The anti-interference radial vertical plate 612 effectively blocks pressure interference between adjacent reactant output pipes 62, preventing flow fluctuations in one area from causing simultaneous flow deviations in other channels, ensuring the independence and stability of flow output from each reactant output pipe.

[0036] Preferably, the variable frequency pressurized liquid pump 65 is a stainless steel chemical centrifugal pump with a rated pressure of 1.6MPa, which can meet the continuous operation requirements of oilfield waste liquid treatment. Its oil and corrosion resistance is suitable for the treatment scenarios of various oilfield chemical production waste liquids. It has low operating noise, low failure rate during long-term continuous operation, and is suitable for unattended field operations.

[0037] Preferably, the power adjustment mechanism 66 includes a mounting frame 661, a sliding rheostat unit 662 mounted on the mounting frame 661 and electrically connected to the variable frequency pressurized hydraulic pump 65, an adjusting linkage rod 663 connected to the adjusting slide of the sliding rheostat unit 662, a first piston shell 664 connected to the first air guide pipe head 211, and a first adjusting piston body 665 slidably embedded in the piston shell 664 and connected to one end of the adjusting linkage rod 663 inserted into the first piston shell 664. Preferably, the end of the piston shell 664 has a through sliding hole for the adjusting linkage rod 663 to pass through, and a sealing gasket to fill the assembly gap is embedded in the through sliding hole. Preferably, the variable frequency pressurized hydraulic pump 65 and the sliding rheostat unit 662 are connected in series in the same electrical circuit, and the working voltage of the variable frequency pressurized hydraulic pump 65 is changed by the change of the working position of the sliding rheostat unit 662, thereby adjusting the real-time power of the variable frequency pressurized hydraulic pump 65. The sliding rheostat unit 662 is a conventional sliding rheostat, which includes a base frame, an insulated adjusting slide, a moving conductive contact fixed on the adjusting slide, and a fixed resistance bar arranged axially along the front slow-flow pipe 2. The fixed resistance bar is connected to the power supply circuit of the variable frequency pressurized liquid pump 65. The base frame is fixedly connected to the mounting frame 661. Under the drive of the adjusting linkage rod 663, the adjusting slide can slide synchronously axially with the pressure change of the annular gas chamber, driving the moving conductive contact to slide along the fixed resistance bar to change the resistance value of the circuit. It has a simple structure, fast action response, and can realize pressure-linked power regulation without additional sensors. Its reliability is far higher than that of the electronic control sensing regulation scheme, and it is more suitable for the harsh working environment of oil fields. Preferably, the fixed resistor bar and the moving conductive contact of the power adjustment mechanism 66 are connected to the power supply circuit of the variable frequency pressurized liquid pump 65. When the pressure in the annular gas chamber changes and pushes the pressure floating piston and the insulating guide rod to move, the moving conductive contact slides synchronously along the fixed resistor bar, changing the resistance value of the circuit connected to it, thereby realizing the linkage adjustment of the working power of the variable frequency pressurized liquid pump 65. The overall structure is simple and reliable, and the adjustment response speed is fast.

[0038] like Figure 2As shown, the reset balancing mechanism 7 includes a balancing tube 71 with a variable-capacity manifold shell 31 on its outer surface and connected to the third air guide pipe head 241, a balancing piston body 72 slidably embedded in the balancing tube 71, and a linkage push-pull rod 73 connected to the balancing piston body 72 and slidably passing through the bottom end of the balancing tube 71. More preferably, the lower axial end of the linkage push-pull rod 73 extending outside the balancing tube 71 is also inserted into the variable-capacity manifold shell 31 and connected to the upper end face of the first flow regulating inner shell 32, so that the linkage push-pull rod 73 can move axially synchronously with the first flow regulating inner shell 32 in conjunction. Preferably, both the balancing tube 71 and the variable-capacity manifold shell 31 have through-holes for the linkage push-pull rod 73 to drive, and sealing gaskets for filling assembly gaps are embedded in the through-holes. The two sections of the balancing tube 71 separated by the balancing piston body 72 have approximately equal air pressure in the initial state, which limits the initial working position and allows for effective adaptive reciprocating translation when the annular air chamber fluctuates. The pressure change in the annular air chamber synchronously drives the balancing piston body 72 to move axially, which in turn drives the first flow-regulating inner tube shell 32 to move axially along the variable-volume manifold shell 31 through the linkage push-pull rod 73. This allows the volume of the mixing chamber to adaptively adjust with the flow rate change of the input waste liquid: when the input flow rate increases and the pressure in the annular air chamber rises, the balancing piston body 72 moves downward, pushing the first flow-regulating inner tube shell 32 downward, expanding the volume of the mixing chamber and buffering the flow pressure; when the input flow rate decreases and the pressure in the annular air chamber decreases, the balancing piston body 72 moves upward, driving the first flow-regulating inner tube shell 32 upward, reducing the volume of the mixing chamber and avoiding insufficient output pressure. This achieves fully mechanical volume adaptive adjustment, automatically adjusting the working position according to the input flow rate change without additional power input, further improving the overall operational reliability of the equipment and reducing control complexity.

[0039] Preferably, a fourth gas guide pipe head 711, which is connected to the third gas guide pipe head 241, is inserted into the upper axial end of the balance tube 71. Preferably, a plurality of circumferentially spaced variable volume manifold shells 31 are also connected to the bottom surface of their shell cavities by a common pressure annular gas pipe 712, and the common pressure annular gas pipe 712 is also provided with a gas filling and releasing valve port. The common pressure annular gas pipe 712 connects the balance tubes corresponding to the multiple variable volume manifold shells, so that the pressure of each annular gas chamber can be synchronized, ensuring that the volume adjustment action of multiple mixing chambers is consistent, avoiding the liquid flow turbulence caused by uneven pressure at different work positions, and at the same time, the overall gas pressure can be preset and adjusted through the gas valve port to adapt to the basic pressure requirements of different working conditions.

[0040] like Figure 3As shown, the positioning side frame 82 of the turbulence assembly 8 is detachably installed on the side of the flat shell mixing pipe 412, and several composite magnetic shielding guide pipes 83 made of materials such as silicon steel are inserted into the positioning side frame 82. Preferably, the turbulence column 81 is slidably inserted into the composite magnetic shielding guide pipe 83, and a magnetic suction block 84 is provided at the insertion front end of the turbulence column 81. Preferably, an elastic limiting member 85 is also fitted on the column body of the turbulence column 81 inside the composite magnetic shielding guide pipe 83 to limit the initial state of the turbulence column 81 inserted into the flat shell mixing pipe 412. The turbulence column 81 can disturb the mixed liquid flow through the flat shell mixing pipe 412, so that the mixed liquid flow can continuously change its flow direction and diverge and converge under the obstruction of the turbulence column, thereby improving the mixing uniformity. Preferably, an electromagnet 86 is also embedded at the end of the composite magnetic shielding guide tube 83 away from the flat shell mixing tube 412, and the electromagnet 86 is electrically connected to a two-position switch 87. The two-position switch 87 is linked to an opening and closing adjustment mechanism 88 mounted on the second air duct head 212. Thus, when the opening and closing adjustment mechanism 88 changes position, the two-position switch 87 closes and opens different electrical circuits, causing the electromagnet 86 in the same closed electrical circuit to pull the magnetic block 84 and the turbulence column 81 to move axially out of the flat shell mixing tube 412, thereby cleaning the flocculent precipitates on the turbulence column 81. When the mixed liquid has a high solids content and is prone to scaling, the pressure change in the annular gas chamber will synchronously trigger the opening and closing adjustment mechanism 88, causing the electromagnet 86 to switch between on and off states. This causes the turbulence column 81 to periodically extend and retract, cleaning the scale adhering to the surface of the turbulence column without stopping the machine. This prevents the scale buildup on the surface of the turbulence column from increasing and clogging the flow channel after long-term operation, ensuring a stable flow area during long-term operation and reducing the frequency of equipment downtime for maintenance. Preferably, the elastic limiter 85 is a compression spring. Under normal conditions, it pushes the turbulence column to maintain its working position inserted into the flat shell mixing tube. When the electromagnet is energized, it generates magnetic force, which overcomes the spring force to pull the turbulence column back to complete the scaling. After the power is turned off, the spring automatically pulls the turbulence column back to its original position. The structure is simple and the operation is reliable. It can automatically complete the scaling action according to the working conditions without additional complex control.

[0041] Preferably, the section of the turbulence column 81 inserted into the flat-shell mixing pipe 412 has a double-headed conical cross-section that can divert the mixed liquid flow with low obstruction. This ensures effective disturbance of the liquid flow, reduces the overall flow-facing area of ​​the turbulence column, lowers the liquid flow resistance, and makes it easier for scale to fall off under the flushing of the liquid flow, thus improving the cleaning effect of automatic descaling. The composite magnetically shielded guide pipe 83, made of materials such as silicon steel, can avoid electromagnetic crosstalk when arranged side by side, ensuring that the magnetic force of each electromagnet is independently controllable, avoiding mutual interference between the actions of adjacent turbulence columns, ensuring that the descaling action accurately corresponds to the triggering conditions, and improving the reliability of the structure. Preferably, the electromagnets 86 corresponding to two adjacent turbulence columns 81 are connected to different electrical circuits, so that the two adjacent turbulence columns can alternately complete the extension and retraction actions, without simultaneously reducing the flow area and causing a sudden change in liquid pressure. This ensures stable liquid flow during the descaling process and avoids the descaling operation affecting the continuity of the overall mixing process.

[0042] Preferably, the double-position switch 87 includes a wiring base, four stationary contact strips arranged in pairs and aligned, and a swing conductive contact plate mounted on the second linkage adjusting rod of the opening and closing adjusting mechanism 88. The swing conductive contact plate is slidably mounted on the narrowing rod of the second linkage adjusting rod, and two compensating return springs are mounted on the narrowing rod, respectively located on the upper and lower sides of the swing conductive contact plate. Under the reciprocating push of the second adjusting piston, the swing conductive contact plate alternately closes and contacts the contact ends of the two sets of stationary contact strips, thereby completing the switching of the electromagnet's on / off circuit. The structure is simple, the linkage is direct, and the station switching can be achieved without additional electrical control components, making it suitable for the harsh unattended operating environment of oil fields. Example

[0043] In another specific implementation, such as Figure 6 As shown, the output end of the second flow regulating inner shell 33 is provided with a porous tube 331 that can move axially up and down with it. The top of the flow regulating column 34 is provided with a receiving groove. Thus, the lowered second flow regulating inner shell 33 can allow the porous tube 331 to be inserted into the receiving groove of the flow regulating column 34, thereby reducing the number of its conductive side holes. Thus, when the hydraulic pressure of the mixed liquid flow in the mixing chamber increases with the increase of the flow rate of the waste liquid and the reactant, the flow rate growth trend is reduced by reducing the total cross-section of the flow channel on its output side, so as to maintain the stability of the continuous output of the mixed liquid and the adaptive feeding pipe 3.

[0044] Preferably, a buffer flow equalizer 332 is connected to the bottom of the porous tube 331. Specifically, the buffer flow equalizer 332 includes a buffer column shell inserted into the bottom end face of the porous tube 331 and communicating with the inner cavity of the porous tube 331, and a buffer diaphragm that divides the cavity of the buffer column shell vertically. When fluctuations occur in the mixed liquid flow within the porous tube 331, the buffer diaphragm undergoes synchronous elastic deformation to absorb the fluctuation energy, buffer the flow impact, and prevent sudden changes in output pressure from causing subsequent pipeline vibration, further improving output stability. Multiple side drain holes communicating with the cavity of the porous tube shell are provided on the side wall of the buffer column shell, which can gradually discharge the liquid flow after the buffer diaphragm deforms and buffers, allowing the fluctuating pressure to be gradually released and ensuring a stable and uniform output pressure.

[0045] This invention is not limited to the above-described optional embodiments. Anyone inspired by this invention can derive various other forms of products. Regardless of any changes in shape or structure, any technical solution falling within the scope of the claims is protected by this invention. Those skilled in the art should understand that this specification and its accompanying drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this invention is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. An adaptive axial flow mixer for treating waste liquid from oilfield chemical production, comprising an inlet pipe head (1), characterized in that, The output end of the inlet pipe (1) is connected to a pre-flow slowing pipe (2) capable of slowly releasing the flow pulses and pressure pulses during the input process of the waste liquid flow. The output end of the pre-flow slowing pipe (2) is also connected to an adaptive feeding pipe (3) capable of adaptively mixing reactant into the waste liquid flow in a fixed proportion according to the working condition changes of the pre-flow slowing pipe (2). The output end of the adaptive feeding pipe (3) is also connected to an axial flow mixing pipe (4). The output end of the axial flow mixing pipe (4) is connected to an outlet pipe (5) that outputs the mixed liquid flow. The outer side of the pre-flow slack pipe (2) is also provided with a flow-following agent supply component (6) that can adjust the liquid flow pressure of the reactant input to the adaptive feed pipe (3) according to the slow-release deformation that occurs therein. Furthermore, the outer side of the adaptive feed pipe (3) is also provided with a reset balance mechanism (7) that is linked to the pre-flow slack pipe (2) and limits its initial position.

2. The adaptive axial flow mixer for treating oilfield chemical production wastewater as described in claim 1, characterized in that, The pre-flow-slowing fitting (2) includes a rigid outer tube shell (21), a rubber inner tube shell (22), a slow-release guide tube head (23), and a limiting sealing ring (24), wherein, The rubber inner tube shell (22) is coaxially fitted with a slow-release guide tube head (23) at both ends, and a limiting sealing ring (24) that can cooperate with the slow-release guide tube head (23) to clamp and limit the rubber inner tube shell (22) is also fitted on the radial outer side of the slow-release guide tube head (23). A rigid outer tube shell (21) is also fitted on the rubber inner tube shell (22), which is coaxially arranged with it and together defines the annular air cavity, and the radial outer ring surface of the limiting sealing ring (24) is connected to the end face of the rigid outer tube shell (21).

3. The adaptive axial flow mixer for treating oilfield chemical production wastewater as described in claim 2, characterized in that, A first gas-conducting connecting pipe head (211) and a second gas-conducting connecting pipe head (212) are also inserted into the outer wall of the rigid outer cylinder shell (21). Multiple third air-guiding connecting pipe heads (241) are also inserted circumferentially at intervals on the ring surface of the limiting sealing ring (24).

4. The adaptive axial flow mixer for treating oilfield chemical production wastewater as described in claim 3, characterized in that, A first flow regulating inner shell (32) and a second flow regulating inner shell (33) are slidably disposed within the variable volume manifold shell (31) of the adaptive feeding fitting (3). The first flow regulating inner shell (32) and the second flow regulating inner shell (33) are coaxially connected in series. Thus, when the first flow regulating inner shell (32) undergoes axial translation, the mixing chamber defined by it and the upper section of the variable volume manifold shell (31) adaptably accommodates the waste liquid flow and reactant that can converge and change in real time within the mixing chamber in a manner that changes synchronously with the volume.

5. The adaptive axial flow mixer for treating oilfield chemical production wastewater as described in claim 4, characterized in that, The variable capacity manifold shell (31) has a plurality of through guide holes (311) spaced apart circumferentially on its shell wall, and the first flow regulating inner shell (32) also has through guide grooves (321) that communicate with the through guide holes (311) and adjust the exposed area of ​​the output port of the through guide holes (311) during the axial translation of the first flow regulating inner shell (32).

6. The adaptive axial flow mixer for treating oilfield chemical production wastewater as described in claim 5, characterized in that, The reset balancing mechanism (7) includes a balancing tube (71) disposed on the outer side of the variable capacity manifold shell (31) and connected to the third air guide pipe head (241), a balancing piston body (72) slidably embedded in the balancing tube (71), and a linkage push-pull rod (73) connected to the balancing piston body (72) and slidably passing through the bottom end of the balancing tube (71). The linkage push-pull rod (73) extends to the lower axial end of the outside of the balance tube (71) and is inserted into the variable capacity manifold shell (31) and connected to the upper end face of the first flow regulating inner shell (32).

7. The adaptive axial flow mixer for treating oilfield chemical production wastewater as described in claim 6, characterized in that, The upper axial end of the balance tube (71) is fitted with a fourth gas-conducting connecting pipe (711) that is connected to the third gas-conducting connecting pipe (241); the variable-capacity manifold shells (31) arranged in a plurality of circumferential intervals are also connected to the bottom surface of their shells by a common-pressure annular gas pipe (712).

8. The adaptive axial flow mixer for treating oilfield chemical production wastewater as described in claim 7, characterized in that, The following-flow agent supply assembly (6) includes a flow guide ring shell (61) fitted on the variable volume manifold shell (31), a reactant output pipe head (62) inserted into the radial inner ring surface of the flow guide ring shell (61) and communicating with the through flow guide hole (311), a reactant input pipe (63) communicating with the flow guide ring shell (61), a storage tank (64) connected to the input end of the reactant input pipe (63), a variable frequency pressurized liquid pump (65) installed on the reactant input pipe (63), and a power adjustment mechanism (66) that can adjust the real-time power of the variable frequency pressurized liquid pump (65).

9. The adaptive axial flow mixer for treating oilfield chemical production wastewater as described in claim 8, characterized in that, The power adjustment mechanism (66) includes a mounting frame (661), a sliding rheostat unit (662) mounted on the mounting frame (661) and electrically connected to the variable frequency pressurized liquid pump (65), an adjustment linkage rod (663) connected to the adjustment slide of the sliding rheostat unit (662), a first piston shell (664) connected to the first air guide pipe head (211), and a first adjustment piston body (665) slidably embedded in the piston shell (664) and connected to one end of the adjustment linkage rod (663) inserted into the first piston shell (664).

10. The adaptive axial flow mixer for treating oilfield chemical production wastewater as described in claim 9, characterized in that, The two ends of the main pipe shell (41) of the axial flow mixing pipe fitting (4) are integrally connected to a mixing inlet pipe (42) and a mixing outlet pipe (43) that can respectively connect to the variable volume manifold shell (31) and the liquid outlet pipe (5), respectively. The main casing (41) includes alternating spiral mixing pipes (411) and flat mixing pipes (412) arranged in series.

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