Efficient flocculation adjusting multi-point dosing and optimized mixing device and method for slurry

Abstract

The application relates to the technical field of mud treatment, and discloses a mud efficient flocculation multi-point dosing optimization mixing device and method, which comprises an equipment bearing frame, the equipment bearing frame is arranged in at least two layers, a medicament mixing unit arranged on the equipment bearing frame, the medicament mixing unit provides a plurality of medicament mixing areas for medicament preparation, a flocculation reaction tank arranged on one side of the equipment bearing frame, a plurality of static mixers arranged on the flocculation reaction tank, a mud pretreatment unit arranged on the side of the equipment bearing frame away from the flocculation reaction tank, mud enters the mud pretreatment unit for sedimentation, and a primary mixing reaction equipment used for primary mixing of medicaments prepared by the medicament mixing unit and the mud pretreatment unit.

Description

Technical Field

[0001] This application relates to the field of mud treatment technology, and in particular to a mud high-efficiency flocculation adjustment multi-point dosing and optimized mixing device and method. Background Technology

[0002] In engineering operations such as building pile foundation construction, mine tailings discharge, municipal pipeline dredging, and river and lake dredging, a large amount of mud with high solid content is continuously generated. If this mud is discharged directly without treatment, it will not only cause water and soil pollution, but also waste water and solid resources. Therefore, it is necessary to achieve solid-liquid separation of mud by adding chemicals for flocculation and flocculation adjustment, so that the supernatant after treatment meets the standards for reuse or discharge, while the sludge can be centrally solidified and treated.

[0003] Currently, the industry has developed various supporting devices and processes for the chemical dosing, mixing, and flocculation treatment of sludge. The mainstream sludge chemical dosing and mixing devices in existing technologies mainly consist of a reagent preparation tank, a single-path dosing pipeline, a mixing tank, a sedimentation tank, and a transfer pump. The conventional process is as follows: one or more reagents are mixed and prepared in a single preparation tank; the reagents are then pumped into the mixing tank through a single-path dosing pipeline and mixed with the pretreated sludge; finally, the mixture is sent to the sedimentation tank for solid-liquid separation. Some improved devices add a simple mixer at the dosing pipeline to improve the mixing effect between the reagents and the sludge. Meanwhile, the supporting structure of existing devices is mostly a single-layer frame or a decentralized arrangement, with reagent preparation, sludge mixing, and flocculation reaction units operating independently and connected by long-distance pipelines.

[0004] In general, existing mud dosing and mixing devices mostly prepare single-agent formulations, and uneven mixing is prone to occur when multiple agents are mixed; the dosing point is singular, the agent and mud contact is insufficient, and the flocculation and flocculation effect is poor; there is a lack of real-time detection of the initial reaction state between the agent and the mud, and the agent-mud ratio cannot be dynamically controlled, which can easily lead to agent waste or substandard treatment. Summary of the Invention

[0005] To address the aforementioned problems, this application provides a device and method for efficient mud flocculation adjustment, multi-point chemical dosing, and optimized mixing.

[0006] The technical solution provided in this application for a high-efficiency mud flocculation multi-point dosing and optimized mixing device and method adopts the following: Firstly, a multi-point dosing and optimized mixing device for efficient flocculation of sludge is proposed, comprising: an equipment support frame, wherein the equipment support frame is arranged in at least two layers; a reagent mixing unit mounted on the equipment support frame; the reagent mixing unit provides multiple reagent mixing areas for reagent preparation; a flocculation reaction tank located on one side of the equipment support frame, wherein multiple static mixers are provided on the flocculation reaction tank; a sludge pretreatment unit located on the side of the equipment support frame away from the flocculation reaction tank, wherein the sludge enters the sludge pretreatment unit for sedimentation; and a primary mixing reaction device, which is a reagent-sludge reaction state detection unit, without forced mixing function, only used for temporary storage of pretreated sludge, and collecting preliminary reagent-sludge reaction data through sensors to provide a basis for dynamic control.

[0007] Furthermore, the mud pretreatment unit includes: a mud settling tank with an internal sedimentation pool; a conveying mechanism fixed inside the mud settling tank and inclined at a predetermined angle; the conveying mechanism conveys the mud; the mud to be flocculated is conveyed by the conveying mechanism to the sedimentation tank for preliminary sedimentation; the mud settling tank is divided into a pretreatment zone and a solid-liquid separation zone by a partition, the solid-liquid separation zone is provided with an overflow weir at the top, and both zones are provided with conical mud discharge ports at the bottom.

[0008] Furthermore, the reagent mixing unit includes at least: a dissolving tank disposed on the lower layer of the equipment support frame, with at least three dissolving tanks; a reagent tank disposed on the upper layer of the equipment support frame, with at least two tanks; multiple pumps adapted to the number of dissolving tanks, each pump being connected to a dissolving tank via a guide pipe; the dissolving tank is connected to the reagent tank and a static mixer via the pumps, and the pumps are used to draw liquid from the dissolving tank to the pipeline for diversion; the pumps are adjustable-flow corrosion-resistant centrifugal pumps with a check valve at the inlet end; the reagent tanks are equipped with a low-speed anti-sedimentation stirring element, and the tank body is equipped with a magnetic level gauge.

[0009] Furthermore, the dissolving vessel includes: a vessel body with an internal mixing chamber for the drug solution; a stirring element disposed within the vessel body; a vessel lid adapted to the size of the vessel body, the vessel lid being threadedly connected to the vessel body; a valve disposed at the center of the upper part of the vessel lid, the valve being connected to a pump body; multiple connection ports, the multiple connection ports serving as inlet and outlet connection areas for the drug; and a detection window disposed on the vessel lid, the detection window being used for detecting the state of the drug within the vessel body.

[0010] Furthermore, the static mixer includes: a mixing pipe providing a mixing area for the agent to be added; a drug inlet port fixed above the mixing pipe and providing a drug introduction area; drug inlet connection ports disposed at both ends of the drug inlet port, at least one of the drug inlet connection ports being tapered; and a squeeze mixing tube disposed within the mixing pipe, wherein a gap is formed between the squeeze mixing tube and the mixing pipe.

[0011] Furthermore, the extrusion mixing tube is provided with a spiral conduit inside, and the extrusion mixing tube is provided with several through holes, and the extrusion mixing tube is tapered from top to bottom.

[0012] Furthermore, the multiple dissolving tanks are independent structures, each used for the mixing and preparation of different agents, and the multiple static mixers are arranged in parallel to realize multi-point dosing and mixing of the mud.

[0013] Furthermore, the equipment support frame is a frame structure formed by welding steel profiles, and each layer of the equipment support frame is reserved with space for the installation of pipes and pumps. The discharge end of the flocculation reaction tank is connected to the sedimentation tank.

[0014] Secondly, a method for efficient flocculation and multi-point dosing optimization of mud is proposed, which includes the following steps: the mud to be flocculated is introduced into the mud pretreatment unit, and then transported to the sedimentation tank through the conveying mechanism in the mud sedimentation tank to complete the initial sedimentation and impurity removal of the mud, so as to obtain homogeneous pretreated mud and transport it to the primary mixing reaction equipment. Different pharmaceutical raw materials are added to multiple independent dissolving tanks in the pharmaceutical mixing unit to complete the simultaneous mixing and preparation of multiple pharmaceuticals. The mixing state of the pharmaceuticals in the tank is monitored through the detection window of the dissolving tank. After preparation, the mixture is ready for use. Start the pump body that matches the number of dissolving tanks, and draw the prepared medicine from each dissolving tank into the guide pipe through the valve of the dissolving tank, and then transport it to the medicine tank on the upper layer of the equipment support frame for unified storage through the connection port; The reagent in the reagent tank is transported to multiple static mixers on the flocculation reaction tank through the guide pipe. The reagent is introduced into the mixing pipe through the inlet connection port and inlet port of the static mixer. Two reagents can be mixed at the same time in the mixing pipe to obtain a mixed reagent. The primary mixing reaction equipment transports the pretreated sludge to the flocculation reaction tank, where it comes into full contact with the compounded agents to carry out the flocculation reaction. The sensors of the primary mixing reaction equipment collect the preliminary reaction data of the sludge in real time and transmit it to the electrical control unit. The electrical control unit adjusts the pump suction power or the conveying mechanism speed according to the detection data to dynamically optimize the sludge ratio. After the reaction, the sludge is returned to the solid-liquid separation zone of the sludge settling tank to complete gravity solid-liquid separation. The supernatant is discharged or reused through the overflow weir, and the bottom sludge is collected centrally through the sludge discharge port.

[0015] Furthermore, multiple static mixers perform reagent mixing operations in parallel. The reagent is accelerated into the mixing pipe after entering the conical inlet port. Relying on the flow guidance and flow diversion effect of the spiral guide tube and the through hole of the extrusion mixing pipe, the two reagents are fully and uniformly mixed. Based on the preliminary reaction data of the reagent and mud detected by the primary mixing reaction equipment, the reagent delivery volume is adjusted by regulating the pump power or the mud delivery rate of the mud pretreatment unit, so as to dynamically optimize the reagent-mud ratio and improve the efficiency and effect of flocculation and flocculation adjustment reaction.

[0016] In summary, this application includes the following beneficial technical effects: The integrated layout of components such as the reagent mixing unit and pump body is achieved by using a layered equipment support frame, which reserves space for pipeline and equipment installation, resulting in high space utilization, compact device structure, and convenient on-site installation and maintenance, thus solving the problem of the scattered layout of existing devices.

[0017] Multiple independent dissolving tanks are used to achieve simultaneous and independent preparation of different reagents, avoiding mutual interference between reagents. Combined with centralized storage of reagent tanks, this enables large-scale preparation of reagents and improves reagent preparation efficiency.

[0018] The primary mixing reaction equipment is set up to monitor the initial reaction state of the reagent and the mud in real time. Based on the monitoring data, the pumping power and mud delivery rate are dynamically adjusted to achieve precise reagent-mud ratio, avoid reagent waste, improve mud flocculation effect, and solve the problem that the existing equipment cannot dynamically control the ratio. Attached Figure Description

[0019] Figure 1 This is a perspective view of a multi-point dosing and optimized mixing device for efficient flocculation of mud according to the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of a multi-point dosing and optimized mixing device for efficient flocculation of mud according to the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the support frame of the device of the present invention.

[0022] Figure 4 This is a perspective view of the static mixer of the present invention.

[0023] Figure 5 This is a cross-sectional view of the static mixer of the present invention.

[0024] Explanation of reference numerals in the attached drawings: 1. Mud pretreatment unit; 2. Primary mixing reaction equipment; 3. Equipment support frame; 4. Chemical dissolving tank; 5. Flocculation reaction tank; 6. Static mixer; 7. Chemical tank; 8. Pump body; 11. Mud sedimentation tank; 12. Conveying mechanism; 13. Sedimentation tank; 21. Observation end; 22. Mixing reaction box; 23. Cover plate; 24. Flow valve; 41. Tank body; 42. Tank cover; 43. Valve; 44. Connection port; 45. Detection window; 61. Chemical inlet port; 62. Chemical inlet connection port; 63. Mixing pipeline; 64. Extrusion mixing pipe. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0026] Example 1 This application discloses a multi-point dosing and optimized mixing device for efficient mud flocculation. (Refer to...) Figures 1 to 5 The specific structure is as follows: Figure 1 As shown, the equipment support frame 3, mud pretreatment unit 1, reagent mixing unit, multi-point reagent mixing unit, flocculation reaction tank 5, and primary mixing reaction equipment 2 are integrated into the equipment support frame 3. They are sealed and connected through pipes, flanges and quick-connect couplings. The electrical control unit is electrically connected to each power component and detection component to achieve overall automated control. Specifically: such as Figure 2 As shown, the equipment support frame 3 is a double-layer frame structure formed by welding of steel profiles. It is made of channel steel and treated with epoxy zinc-rich anti-corrosion paint. The lower layer is reserved for the installation position of the chemical dissolving tank 4, and the upper layer is reserved for the installation position of the chemical tank 7 and the pump body 8. Each layer is reserved for the laying of pipes and electrical wiring with a width of ≥15cm, and each component installation position is equipped with an anti-slip fixed base. A flocculation reaction tank 5 installation platform is set on one side of the support frame, and a mud pretreatment unit 1 docking platform is set on the other side. The overall structure is suitable for on-site hoisting and movement.

[0027] like Figure 2 As shown, the mud pretreatment unit 1 includes a mud settling tank 11 and an inclined adjustable speed conveying mechanism 12. The mud settling tank 11 is made of stainless steel and is divided into a pretreatment zone and a solid-liquid separation zone by a partition. Both zones have conical mud discharge ports at the bottom. The solid-liquid separation zone has an overflow weir and a supernatant discharge port (not shown in the figure) at the top. The conveying mechanism 12 is a corrosion-resistant rubber scraper conveyor, which is fixed at an inclination of 30°-45° in the pretreatment zone of the mud settling tank 11 and is electrically connected to the electrical control unit. The discharge end of the scraper conveyor faces the flocculation reaction tank 5 and is used to transport the pretreated mud to the primary mixing reaction equipment 2. The solid-liquid separation zone of the mud settling tank 11 and the discharge end of the flocculation reaction tank 5 are connected by a pipeline to realize the return sedimentation of the mud after the reaction.

[0028] The reagent mixing unit includes at least three independent dissolving tanks 4, at least two reagent tanks 7, and a corrosion-resistant centrifugal pump body 8 adapted to the number of dissolving tanks 4. The dissolving tanks 4 are located on the lower layer of the equipment support frame 3, and are cylindrical tanks made of PE material. Stainless steel agitators and agitator drive motor (not shown in the figure) are installed inside the tanks. The top of the dissolving tanks 4 is equipped with a tank cover 42, which is connected to the tank body 41 by a threaded seal. The tank cover 42 is equipped with a central valve 43, at least two DN25 connection ports 44, and a transparent acrylic inspection window 4. 5. The breathing valve and the central valve 43 are sealed to the inlet flange of the pump body 8. The connection port 44 serves as the raw material feeding port and the drug outlet port, respectively. The detection window 45 is used to visually observe the mixing state and liquid level of the drug in the tank. The drug tank 7 is located on the upper layer of the equipment support frame 3. It is a 304 stainless steel tank. The tank body is equipped with a magnetic float level gauge. The tank is equipped with a low-speed stirring element (not shown in the figure) to prevent drug precipitation. The feed end of the drug tank 7 is connected to the discharge end of the pump body 8 of the dissolving tank 4. The discharge end is connected to the static mixer 6. In actual use, pump body 8 is a corrosion-resistant centrifugal pump, which is electrically connected to the electrical control unit. Pump body 8 is selected as a flow-adjustable corrosion-resistant centrifugal pump (model IHF100-80-160 recommended), with a flow range of 5-50 m³ / h, to meet the quantitative delivery requirements of different agents. A check valve is installed at the inlet end of pump body 8 to prevent backflow of agents. The pump body 8 is connected to the pipeline by a flange seal to realize independent suction and quantitative delivery of agents in a single tank.

[0029] like Figures 3 to 5 As shown, the multi-point reagent mixing unit consists of multiple parallel static mixers 6, mounted on top of the flocculation reaction tank 5, spaced 30cm apart. They are connected to the discharge end of the reagent tank 7 via a diversion valve, ensuring uniform reagent distribution among the static mixers 6. Each static mixer 6 includes a mixing pipe 63, a reagent inlet port 61, a reagent connection port 62, and a conical extrusion mixing pipe 64. Both the mixing pipe 63 and the reagent inlet port 61 are made of 304 stainless steel. The reagent inlet port 61 is fixed above the mixing pipe 63, and the reagent connection ports 62 are located at both ends of the reagent inlet port 61. The end is a conical structure (taper 1:5) to reduce the resistance to drug introduction and prevent pipe blockage; the conical extrusion mixing tube 64 is coaxially arranged inside the mixing pipe 63, forming a 10mm gap with the mixing pipe 63. The extrusion mixing tube 64 is conical from top to bottom (upper port diameter 60mm, lower port diameter 40mm), and a spiral guide tube (lead 100mm) is installed inside the tube. The tube wall is evenly opened with through holes of 5mm diameter. The discharge end of the extrusion mixing tube 64 faces the inside of the flocculation reaction tank 5; the static mixer 6 can realize the synchronous introduction and full turbulent mixing of the two agents to obtain a compound mixed agent.

[0030] In the above embodiment, multiple static mixers 6 are arranged in parallel at 30cm intervals on the top of the flocculation reaction tank 5. The reagent is evenly distributed to each mixer according to a preset ratio through the diversion valve, so that the reagent is added to the mud flow field from multiple points simultaneously, increasing the contact area between the reagent and the mud and solving the problem of insufficient contact of the traditional single-point dosing.

[0031] In actual use, the conical drug inlet connection port 62 accelerates the introduction of the drug through the diameter reduction effect, reducing flow resistance; the gap formed by the conical extrusion mixing tube 64 and the mixing pipe 63 generates turbulence, which, together with the swirling flow guidance of the spiral conduit inside the tube, makes the drug form a rotating flow field; the through hole on the extrusion mixing tube realizes the diversion and diffusion of the drug. The triple action of swirling flow, diversion and turbulence realizes the full and uniform mixing of the two drugs without power.

[0032] In actual use, the flocculation reaction tank 5 is a reinforced concrete or stainless steel cavity, installed on the mounting platform on one side of the equipment support frame 3. The tank is equipped with a drug distribution pipe, a guide plate, and a low-speed agitator (not shown in the figure, but any components that can be implemented in the existing technology can be used). The drug distribution pipe is connected to the discharge end of the static mixer 6. The guide plate is evenly distributed in the tank to extend the contact path between the drug and the mud. The speed of the low-speed agitator is adjustable from 20 to 30 r / min to prevent the flocs from breaking and to ensure sufficient contact and deep flocculation between the agent and the mud. The feed end of the flocculation reaction tank 5 is connected to the discharge end of the primary mixing reaction equipment 2, and the discharge end is connected to the solid-liquid separation zone of the mud sedimentation tank 11. An air vent is provided at the bottom of the tank.

[0033] The primary mixing reaction device 2 includes a detection and observation end 21, a mixing reaction chamber 22, a cover plate 23, and a flow valve 24. The mixing reaction chamber 22 is a 304 stainless steel cavity structure, located between the mud pretreatment unit and the flocculation reaction tank. Its feed end is connected to the discharge end of the scraper conveyor of the mud pretreatment unit 1, and its discharge end is connected to the flocculation reaction tank through the flow valve 24. The flow valve 24 is electrically connected to the electrical control unit for precise control of the mud delivery rate. The top of the mixing reaction chamber 22 is fitted with a cover plate 23 to prevent impurities. The device is used for the entry of substances and the volatilization of reagents. The detection and observation end 21 is located at the front end of the mixing reaction chamber 22. The side wall of the mixing reaction chamber 22 is provided with a transparent observation window, which is arranged corresponding to the detection and observation end 21. The interior is equipped with a turbidity sensor and a flocculant monitoring sensor, both of which are electrically connected to the electrical control unit. The testing personnel can perform operations such as sensor debugging and manual observation of the reaction status at the detection and observation end 21. This device is only a detection unit and does not have a forced mixing function. The mixing reaction chamber 22 is only used to temporarily store the pretreated mud and complete the detection of the initial reaction of the drug mud.

[0034] In the above embodiments, furthermore, each pipe connection is sealed with flanges and gaskets or quick-connect fittings. Breathing valves are provided on the top of the dissolving tank 4 and the reagent tank 7 to prevent excessive pressure inside the tank and to avoid the volatilization of the reagent. At the same time, the bottom of the dissolving tank 4, the reagent tank 7, the flocculation reaction tank 5, and the primary mixing reaction equipment 2 are all provided with vents, and each vent is equipped with a valve 43. The equipment support frame 3 is provided with a cleaning water interface, which is connected to the cleaning port of each unit to facilitate the drainage of residual materials and cleaning after use.

[0035] To further enhance the overall coordination of the device, an electrical control unit can be added during actual use. The electrical control unit includes a control cabinet, a frequency converter, and a data acquisition module. The control cabinet is located on one side of the equipment support frame 3 and integrates the frequency converter and the data acquisition module. The data acquisition module is electrically connected to the sensors of the primary mixing reaction device 2 and the level gauge of the reagent tank 7 to collect detection data and level data. The frequency converter is electrically connected to the pump body 8, the conveying mechanism 12, and each stirring component. It can adjust the pumping power of the pump body 8, the conveying rate of the conveying mechanism 12, and the rotation speed of the stirring components in real time according to the collected detection data to achieve dynamic closed-loop control of the drug sludge ratio.

[0036] Example 2 Based on the efficient flocculation and multi-point dosing optimization mixing device for mud in Example 1, the specific steps include: S1. The slurry to be flocculated is introduced into the pretreatment zone of the slurry sedimentation tank 11. The tilting adjustable speed conveying mechanism 12 is started to convey the slurry to the sedimentation tank 13 to complete gravity pre-sedimentation, remove large suspended impurities with a particle size ≥0.5mm from the slurry, and obtain homogeneous pretreated slurry. The conveying mechanism 12 quantitatively conveys the homogeneous pretreated slurry to the primary mixing reaction equipment 2 for temporary storage, waiting to be mixed and reacted with the reagent.

[0037] S2. Add different reagent raw materials (polyaluminum chloride, polyacrylamide, and composite coagulant) and water to three independent dissolving tanks 4 respectively. Start the stirring device in the tank and adjust the stirring speed (50-150 r / min) according to the type of reagent to complete the independent and synchronous preparation of multiple reagents. During the preparation process, observe the mixing state of the reagents in real time through the detection window 45 of the dissolving tank 4 and monitor the liquid level height through the liquid level gauge to ensure uniform concentration of the reagents. After preparation, set aside for use.

[0038] S3. Start the corrosion-resistant centrifugal pump body 8, which is matched with the number of dissolving tanks 4, and open the central valve 43 on the top of the dissolving tank 4. The pump body 8 draws the prepared medicine from each dissolving tank 4 into the medicine tank 7 for centralized storage. The pumping rate of the pump body 8 is controlled by the electrical control unit. The low-speed stirring element in the medicine tank 7 runs continuously (20r / min) to prevent the medicine from settling. The magnetic float level gauge monitors the liquid level in the medicine tank 7 in real time. When the liquid level is lower than the preset value, the electrical control unit automatically starts the pump body 8 to add medicine.

[0039] S4. According to the requirements of the slurry flocculation process, the electrical control unit regulates the discharge end diversion valve of the agent tank 7 to deliver different types of agents to multiple parallel static mixers 6 according to a preset ratio. The agents are accelerated into the inlet port 61 through the conical inlet connection port 62, and then enter the mixing pipe 63. In the conical extrusion mixing pipe 64, the agents are guided by the spiral conduit and diffused by the through hole to achieve full and uniform mixing of the two agents, resulting in a compound mixed agent. Multiple static mixers 6 operate in parallel to achieve uniform addition of agents at multiple points. The compound mixed agent is uniformly introduced into the flocculation reaction tank 5 through the distribution pipe.

[0040] S5. The primary mixing reaction device 2 transports the temporarily stored pretreated slurry to the flocculation reaction tank 5, where it comes into full contact with the compounded reagent. The guide plate and low-speed stirring device in the flocculation reaction tank 5 ensure deep contact between the reagent and the slurry, forming stable flocs. The turbidity sensor and floc monitoring sensor in the primary mixing reaction device 2 collect the detection data of the initial reaction of the reagent and slurry in real time and transmit the data to the electrical control unit. If it is detected that the flocs are forming slowly (turbidity ≥ 200 NTU) or the flocs are too small and easily broken, the electrical control unit automatically increases the suction power of the pump body 8 through the frequency converter, increases the amount of reagent added, or reduces the speed of the slurry conveying mechanism 12 to reduce the amount of slurry conveyed, and dynamically optimizes the reagent-slurry ratio. If the reaction status is found to be up to standard, the reagent-slurry ratio is kept unchanged.

[0041] S6. The sludge after deep flocculation and flocculation reaction is returned from the discharge end of the flocculation reaction tank 5 to the solid-liquid separation zone of the sludge settling tank 11 to complete gravity solid-liquid separation. The supernatant after separation is discharged or reused through the overflow weir and the supernatant discharge port after meeting the standards. The sludge at the bottom is collected through the conical sludge discharge port and sent to the sludge solidification station for solidification treatment. During the operation, the pretreatment zone and the solid-liquid separation zone of the sludge settling tank 11 work independently to avoid mixing of the sludge to be treated with the sludge after reaction and to ensure the sedimentation effect.

[0042] S7. After the mud treatment operation is completed, shut down all power components and open the drain ports at the bottom of the chemical dissolving tank 4, chemical tank 7, flocculation reaction tank 5, and primary mixing reaction equipment 2 in sequence to drain the residual materials in the tanks and pools; connect the cleaning water interface to the external water source, open the cleaning port, and thoroughly clean each unit and pipeline. The wastewater after cleaning is returned to the mud sedimentation tank 11 for unified treatment to prevent residual materials from causing component corrosion and pipeline blockage.

[0043] Example 3 The difference between this embodiment and Embodiment 2 is that this embodiment treats the flocculated slurry (25% solids content, 0.01-0.8mm particle size) generated from mine tailings discharge. The composite coagulant aid in the second reagent tank 7 is mixed with the polyaluminum chloride solution through the static mixer 6, with an initial drug-to-slurry volume ratio of 120:1. The primary mixing reaction equipment 2 detects that the flocs with a particle size ≤0.5mm are easily broken, and the electrical control unit automatically reduces the speed of the conveying mechanism 12 to 0.4m / s, the slurry conveying rate to 18m³ / h, and the drug-to-slurry volume ratio is optimized to 100:1. After treatment, the slurry solid-liquid separation efficiency is 95%, the turbidity of the supernatant is 29NTU, which meets the mine wastewater discharge standard, and the reagent utilization rate is increased by 40%.

[0044] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multi-point dosing and optimized mixing device for efficient mud flocculation, characterized in that, include: The equipment support frame is configured with at least two layers. A pharmaceutical mixing unit is mounted on the equipment support frame, and the pharmaceutical mixing unit provides multiple pharmaceutical mixing areas for pharmaceutical preparation; A flocculation reaction tank is located on one side of the equipment support frame, and multiple static mixers are installed on the flocculation reaction tank; The mud pretreatment unit is located on the side of the equipment support frame away from the flocculation reaction tank, and the mud enters the mud pretreatment unit for sedimentation; A primary mixing reaction device is used to detect the initial reaction state of the reagent and the mud; the primary mixing reaction device includes a mixing reaction chamber and a cover plate disposed on the mixing reaction chamber, and a detection and observation end disposed at the front end of the mixing reaction chamber. Flow valves are provided at both the inlet and outlet ports of the mixing reaction chamber.

2. The efficient flocculation-regulating multi-point dosing and optimized mixing device for mud according to claim 1, characterized in that, The mud pretreatment unit includes: The mud settling tank contains a settling pool. A conveying mechanism is fixed inside the mud settling tank and inclined at a predetermined angle; the conveying mechanism conveys mud. The flocculated slurry to be regulated is transported to the sedimentation tank by a conveying mechanism for preliminary sedimentation; the slurry sedimentation tank is divided into a pretreatment zone and a solid-liquid separation zone by a partition. An overflow weir is provided at the top of the solid-liquid separation zone, and a conical slurry discharge port is provided at the bottom of both zones.

3. The efficient flocculation-regulating multi-point dosing and optimized mixing device for mud according to claim 1, characterized in that, The pharmaceutical mixing unit includes at least: A dissolving tank is installed on the lower layer of the equipment support frame, and at least three dissolving tanks are provided. At least two medicine containers are mounted on the upper layer of the equipment support frame. Multiple pump bodies are provided to match the number of dissolving tanks, and each pump body is connected to a dissolving tank via a guide pipe; The dissolving tank is connected to the drug tank and the static mixer via a pump body, which is used to draw the liquid in the dissolving tank into the pipeline for diversion.

4. The efficient flocculation-regulating multi-point dosing and optimized mixing device for mud according to claim 3, characterized in that, The dissolving vessel includes: The tank body has an internal medicine mixing chamber, and a stirring element is installed inside the tank body. The tank lid is adapted to the size of the tank body; the tank lid and the tank body are connected by a threaded rotation. A valve is located at the center of the tank cover and is connected to the pump body. Multiple connection ports are provided, and each of the multiple connection ports serves as an inlet and outlet connection area for the drug. A detection window is provided on the tank cover, and the detection window is used to detect the status of the medicine inside the tank body.

5. The efficient flocculation-regulating multi-point dosing and optimized mixing device for mud according to claim 1, characterized in that, The static mixer includes: Mixing conduits provide a mixing area for the agents to be added; A drug inlet port is fixed above the mixing pipe, providing a drug inlet area; A drug inlet connection port is provided at both ends of the drug inlet port; at least one of the drug inlet connection ports is set in a conical shape. An extrusion mixing tube is disposed inside the mixing pipe, forming a gap between the tube and the mixing pipe.

6. The efficient flocculation-regulating multi-point dosing and optimized mixing device for mud according to claim 5, characterized in that, The extrusion mixing tube has a spiral conduit inside and several through holes. The extrusion mixing tube is tapered from top to bottom.

7. The efficient flocculation-regulating multi-point dosing and optimized mixing device for mud according to claim 3, characterized in that, The multiple dissolving tanks are independent structures, each used for the mixing and preparation of different agents. The multiple static mixers are arranged in parallel to realize multi-point dosing and mixing of the mud. Each static mixer is connected to the agent tank through a diversion valve to achieve uniform distribution of the agent.

8. The efficient flocculation-regulating multi-point dosing and optimized mixing device for mud according to claim 1, characterized in that, The equipment support frame is a frame structure welded from steel profiles. Each layer of the equipment support frame is reserved with space for the installation of pipes and pumps. The discharge end of the flocculation reaction tank is connected to the sedimentation tank.

9. A method for efficient flocculation control and multi-point chemical dosing optimization mixing of mud, implemented based on the mixing device described in any one of claims 1-8, characterized in that, Includes the following steps: The flocculated slurry to be conditioned is introduced into the slurry pretreatment unit and then transported to the sedimentation tank via the conveying mechanism in the slurry sedimentation tank. This completes the initial sedimentation and impurity removal of the slurry, resulting in homogeneous pretreated slurry, which is then transported to the primary mixing reaction equipment. Different pharmaceutical raw materials are added to multiple independent dissolving tanks in the pharmaceutical mixing unit to complete the simultaneous mixing and preparation of multiple pharmaceuticals. The mixing state of the pharmaceuticals in the tank is monitored through the detection window of the dissolving tank. After preparation, the mixture is ready for use. Start the pump body that matches the number of dissolving tanks, and draw the prepared medicine from each dissolving tank into the guide pipe through the valve of the dissolving tank, and then transport it to the medicine tank on the upper layer of the equipment support frame for unified storage through the connection port; The reagent in the reagent tank is transported to multiple static mixers on the flocculation reaction tank through the guide pipe. The reagent is introduced into the mixing pipe through the inlet connection port and inlet port of the static mixer. Two reagents can be mixed at the same time in the mixing pipe to obtain a mixed reagent. The primary mixing reaction equipment transports the pretreated sludge to the flocculation reaction tank, where it comes into full contact with the compounded agents to carry out the flocculation reaction. The sensors of the primary mixing reaction equipment collect the preliminary reaction data of the sludge in real time and transmit it to the electrical control unit. The electrical control unit adjusts the pump suction power or the conveying mechanism speed according to the detection data to dynamically optimize the sludge ratio. After the reaction, the sludge is returned to the solid-liquid separation zone of the sludge settling tank to complete gravity solid-liquid separation. The supernatant is discharged or reused through the overflow weir, and the bottom sludge is collected centrally through the sludge discharge port.

10. The method for efficient flocculation and multi-point dosing optimization of mud mixing according to claim 9, characterized in that, Multiple static mixers perform reagent mixing operations in parallel. The reagents are accelerated into the mixing pipe after entering the inlet port through the conical inlet connection port. Relying on the flow guidance and flow diversion effect of the spiral guide tube and the through hole of the extrusion mixing pipe, the two reagents are fully and uniformly mixed. Based on the preliminary reaction data of reagents and mud detected by the primary mixing reaction equipment, the reagent delivery volume is adjusted by regulating the pump's suction power, or the mud delivery rate of the mud pretreatment unit is adjusted to dynamically optimize the reagent-mud ratio and improve the efficiency and effect of flocculation and flocculation adjustment reaction.

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