Intelligent semi-wet material feeding device and control method thereof

Abstract

The invention discloses an intelligent semi-wet material feeding device and a control method thereof, and belongs to the field of water treatment.The intelligent semi-wet material feeding device comprises an intelligent stock bin assembly, a metering conveying assembly, a drying conveying assembly, a dynamic gradient suspended phase regulation and control cabin and an intelligent control set; the intelligent stock bin assembly comprises a conical bin body, a high-frequency resonance depolymerization module, a radar level meter and a purifying and filtering dust intercepting device. The high-frequency resonance depolymerization module, the radar level meter and the purifying and filtering dust intercepting device are all arranged on the bin body. Multiple anti-sticking and anti-blocking designs and an intelligent drying and conveying technology are adopted, so that the operation reliability of the feeding device is remarkably improved; a full-process automatic control system is constructed by means of an intelligent control module and a collaborative algorithm, and unmanned intelligent operation from material feeding to concentration regulation and control is achieved; through the dynamic regulation and control cabin and the integrated design, the chemical concentration is accurately controlled, meanwhile, the occupied area and the operation cost of equipment are greatly reduced, and the energy consumption and the maintenance cost are remarkably reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of water treatment, and in particular relates to an intelligent semi-wet material dosing device and a control method thereof. Background Art

[0002] In the field of material dosing in industrial production, dry and wet methods are the mainstream technologies widely used in scenarios such as water treatment agent addition and chemical raw material distribution. Dry dosing adjusts the dosage by controlling the dry powder delivery rate of the conveyor. This method is efficient, convenient, and space-saving, but it also has disadvantages such as unstable concentration and slow dosing adjustment response. In contrast, wet dosing adjusts the dosage by pumping a fixed-concentration solution. This method has the characteristics of constant concentration and fast dosing adjustment response. However, it requires a large dissolution reservoir, a dissolution storage process, and a dual-solution alternating operation mode, resulting in large equipment space and high investment costs. Furthermore, the staged dosing method, which requires manual dissolution and cleaning, leads to disadvantages such as concentration control lag, agent waste, and fluctuating dispensing concentration. Furthermore, the conventional equal-diameter spiral conveyor structure has loose materials, and moisture can backflow, causing blockages such as material bridging and wall sticking. The accompanying open-type drop design further causes dust pollution and metering errors, limiting its application effectiveness. The existing technology is limited by the technical bottleneck of dry-wet binary separation. It can neither fully unleash the high efficiency advantages of the dry method nor break through the system complexity of the wet method. Therefore, an intelligent semi-wet material dosing device and its control method are proposed. Summary of the Invention

[0003] The purpose of the present invention is to provide an intelligent semi-wet material dosing device and a control method thereof, which adopts a closed-loop concentration monitoring system and an intelligent adjustment algorithm to achieve instant control of the dosage of the material and the water intake through precise control of the material dosage and the water intake, thereby retaining the high efficiency and convenience of dry dosing while also having the rapid adjustment responsiveness of wet dosing. At the same time, it solves the problems in the existing industrial production material dosing field, such as easy clogging and pollution, large metering errors, complex equipment, high cost, concentration fluctuations, delayed concentration control, and frequent manual intervention, and is limited by the bottleneck of dry and wet binary separation technology and cannot combine the advantages of both.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: including an intelligent silo component, a metering and conveying component, a drying and conveying component, a dynamic gradient suspension phase control cabin and an intelligent control group; The intelligent silo assembly includes a conical silo body, a high-frequency resonance deagglomeration module, a radar level meter, and a No. 1 clean filter dust interceptor, and the high-frequency resonance deagglomeration module, the radar level meter, and the No. 1 clean filter dust interceptor are all arranged on the silo body; The metering and conveying assembly includes a dual-drive screw conveyor and a gravity sensor. The dual-drive screw conveyor is independently driven by two motors, and the gravity sensor is used to provide real-time feedback on material quality. The drying and conveying assembly includes a dual-mode variable frequency fan, an inlet one-way dust blocker, a variable diameter screw compacting device, a moisture interceptor and an outlet one-way dust blocker. The dual-mode variable frequency fan cooperates with a heating wire to achieve hot air dehumidification, and the variable diameter screw compacting device is used to compact the material. The dynamic gradient suspended phase control cabin includes a No. 2 filter dust interceptor, a cabin body, an agitator, a water inlet flow control system and a concentration detector. The water inlet flow control system is used to accurately control the water inlet volume, and the concentration detector is used to monitor the concentration of the reagent in real time. The intelligent control group includes a PLC controller, an HMI human-machine interface and an Internet of Things module, which are used to build a multi-parameter collaborative control model and realize closed-loop regulation.

[0005] Furthermore, the inner wall of the warehouse is covered with a nano-hydrophobic coating, which is made of polytetrafluoroethylene-based material with a thickness of 50 μm. The vibration frequency of the high-frequency resonance deagglomeration module is 20 kHz ± 5%, and the amplitude can be adjusted in the range of 0.1 to 0.5 mm. The radar level meter has a range of 0 to 5 m and an accuracy of ± 1 mm. The filtration accuracy of the No. 1 filter dust collector is 0.3 μm.

[0006] Furthermore, the screw diameter of the dual-drive screw conveyor is 150 mm, the gravity sensor collects mass data every 0.1 second, the measurement error is ≤±0.5%, and the dual-drive screw conveyor is arranged in a transparent acrylic sealing cover.

[0007] Furthermore, the air volume range of the dual-mode variable frequency fan is 0~50m³ / min, the heating wire is made of nickel-chromium alloy, the humidity interceptor includes multiple silicone moisture-absorbing material tubes, and the inlet one-way dust blocker and the outlet one-way dust blocker both contain check and filter structures.

[0008] Furthermore, the cabin volume of the dynamic gradient suspended phase control cabin is 500L, the water inlet flow control system includes an electromagnetic control valve and a flow sensor with an adjustment accuracy of ±1%, and the concentration detector is a laser scattering type with a measuring range of 0~20%.

[0009] A control method for an intelligent semi-wet material dosing device comprises the following steps: Initialization startup: Set the target dosage and concentration through the HMI human-machine interface, and the system will self-check and detect the material inventory; Material handling and transportation: Materials slide through the intelligent silo to the metering and conveying components for precise weighing, and then are dehumidified and compacted by the drying and conveying components for transportation; Suspended phase control and dosing: Dynamically calculate the ratio concentration according to the water flow rate and material amount, stir to form a suspension and then add; Intelligent optimization and maintenance: Optimize operating parameters through machine learning, monitor blockage risks in real time, and implement coordinated protection.

[0010] Furthermore, the concentration setting range is 0-20%, and the airflow temperature of the drying conveying assembly is controlled at 40-60°C. After the device completes dispensing, the reducing spiral stops rotating, and the dry airflow is turned on to clear and dehumidify the spiral tube. The dry airflow dehumidification lasts for approximately 10-30 seconds. The concentration detector provides feedback every 5 seconds, and concentration fluctuations are controlled within ±2%.

[0011] Furthermore, when the intelligent optimization and maintenance system detects abnormal vibration of the drying and conveying component, it triggers an alarm and shuts down the machine.

[0012] Compared with the prior art, the present invention has the following beneficial effects: By building a new material handling paradigm of "anti-sticking - precise metering - intelligent drying - closed-loop control", multiple anti-sticking designs and intelligent drying and conveying technologies, the operational reliability of the dosing device is significantly improved; relying on intelligent control modules and collaborative algorithms, a full-process automated control system is built to achieve unmanned intelligent operation from material dosing to concentration control; through dynamic control cabins and integrated design, while accurately controlling the concentration of the reagents, the equipment footprint and operating costs are greatly reduced, and energy consumption and maintenance costs are significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of an intelligent semi-wet material dosing device; Figure 2 This is a schematic diagram of the intelligent control group; Figure 3 for Figure 1 Schematic diagram of the intelligent silo component and metering and conveying component; Figure 4 for Figure 1 Schematic diagram of the drying and conveying components; Figure 5 for Figure 1 Schematic diagram of the medium dynamic gradient suspended phase control cabin; In the figure: 11. Cabin; 12. High-frequency resonance deagglomeration module; 13. Radar level meter; 14. No. 1 filter dust interceptor; 21. Dual-drive screw conveyor; 22. Gravity sensor; 311. Nickel-chromium alloy heating wire; 32. Inlet one-way dust interceptor; 33. Variable diameter screw compactor; 34. Connecting pipe; 35. Moisture interceptor; 36. Outlet one-way dust interceptor; 41. No. 2 filter dust interceptor; 42. Water inlet flow control system; 421. Control valve; 422. Flow sensor; 43. Agitator; 44. Concentration detector; 51. PLC controller; 52. HMI touch screen; 53. Alarm light. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the embodiments.

[0015] The following examples are intended to illustrate the present invention but are not intended to limit the scope of protection of the present invention. The conditions in the examples may be further adjusted according to specific conditions. Simple improvements to the method of the present invention within the scope of the present invention are also within the scope of protection claimed in the present invention.

[0016] See also Figure 1-5 The present invention provides an intelligent semi-wet material feeding device, including an intelligent silo component, a metering and conveying component, a drying and conveying component, a dynamic gradient suspended phase control cabin and an intelligent control group.

[0017] The intelligent silo assembly includes a conical silo body 11. The conical silo body 11 is made of stainless steel 304, with a cone angle of 90°. The inner wall of the conical silo body 11 is fully covered with a nano-hydrophobic coating. The nano-hydrophobic coating is made of polytetrafluoroethylene (PTFE) and has a thickness of 50 μm. The intelligent silo assembly also includes a high-frequency resonance deagglomeration module 12, a radar level meter 13 and a No. 1 filter dust collector 14. The high-frequency resonance deagglomeration module 12 is welded to the side wall of the cone of the silo body, with a vibration frequency of 20kHz±5% and an adjustable amplitude of 0.1~0.5mm; the radar level meter 13 is vertically installed on the top of the silo, with a measuring range of 0~5m and an accuracy of ±1mm. The No. 1 filter dust collector 14 is installed on the top of the silo body 11. The filtration accuracy of the No. 1 filter dust collector 14 is 0.3μm, and the bottom is connected to the feed port of the metering and conveying assembly.

[0018] After the material (such as powdered activated carbon) enters the silo, the nano-coating reduces adhesion, and the high-frequency resonance deagglomeration module 12 can break the bridge; the radar level meter 13 measures the inventory data in the silo 11 in real time and feeds it back to the intelligent control group.

[0019] The metering and conveying assembly includes a dual-drive screw conveyor 21, the screw diameter of the dual-drive screw conveyor 21 is φ150mm, and the dual motors independently drive the left and right rotating blades. The dual-drive screw conveyor 21 is set in a sealed cover (transparent acrylic, IP65 protection).

[0020] The metering and conveying assembly further includes a gravity sensor 22 , which is embedded in a bracket of the dual-drive screw conveyor 21 .

[0021] The double-screw conveyor pushes materials at a constant speed (adjustable speed from 0.1 to 1 m / s). The gravity sensor collects mass data every 0.1 seconds and transmits it to the intelligent control unit. The measurement error is ≤±0.5%.

[0022] The drying and conveying component includes a dual-mode variable frequency fan 31 with an air volume of 0-50 m³ / min. The dual-mode variable frequency fan 31 has a built-in nickel-chromium alloy heating wire 311, which can be turned on and off by adjusting the switch. The dual-mode variable frequency fan 31 is set in the conveying pipeline, and the conveying pipeline (stainless steel 316L, Φ80 mm) is covered with an insulation layer.

[0023] The dry conveying assembly also includes an inlet one-way dust blocker 32 and a variable diameter spiral compactor 33. The inlet one-way dust blocker 32, located at the blower outlet, incorporates a check valve and a filter to prevent backflow of material. The variable diameter spiral compactor 33 is powered by a motor. The conveying pipeline is terminated by a hydrophobic, heat-resistant, and wear-resistant flexible connecting pipe 34 to prevent vibration from affecting the seal. The rear of the hydrophobic, heat-resistant, and wear-resistant flexible connecting pipe 34 is flanged to a moisture trap 35. The moisture trap 35 is detachable and contains multiple hygroscopic silicone tubes at its center. An outlet one-way dust blocker 36, incorporating a check valve and a filter, is located at the bottom of the moisture trap 35. This prevents moisture from the dynamic gradient suspension phase control chamber within the pipe outlet from flowing back when feeding is stopped, potentially leading to powder agglomeration and blockage in the conveying pipeline.

[0024] The conveying pipeline inlet is flexibly connected to the outlet of the metering conveying assembly. The conveying pipeline outlet is connected to the feed port at the top of the dynamic gradient suspension phase control chamber. When installing the drying conveying assembly, ensure that the flanges of each unit are sealed (using silicone gaskets). The drying conveying assembly pipeline should be tilted at an angle of ≥5° to prevent material accumulation.

[0025] A dual-mode variable-frequency blower 31 delivers air, while a heating wire dehumidifies to prevent moisture backflow. The airflow temperature is controlled by the system at 40-60°C. When the liquid level in the dynamic gradient suspended phase control chamber reaches the set high level, or when continuous dispensing exceeds two hours, the metering and conveying components cease operation, the water inlet flow control system stops supplying water, the reducing screw stops rotating, and a dry airflow is activated to clear and dehumidify the spiral tube. The dry airflow dehumidification lasts approximately 10-30 seconds. The material is dehumidified in the dry airflow, with an agglomeration rate of ≤0.5%. A reducing screw compactor 33 gradually densifies the material during conveying, reducing air voids between the materials and preventing the ingress of moisture-laden air from the end, which can lead to material compaction.

[0026] The dynamic gradient suspended phase control cabin has a cabin volume of 500L and is made of PP material. The cabin is equipped with a high-efficiency stirrer 43, a water inlet flow control system 42, and a concentration detector 44. The top of the cabin is integrated with a No. 2 filter dust interceptor 41, and the outlet at the bottom of the cabin is connected to a dosing pump.

[0027] The water inlet flow regulating system 42 is controlled by an electromagnetic regulating valve 421 and a flow sensor 422. The fluid regulation accuracy of the water inlet flow regulating system 42 is ±1%. The concentration detector 44 adopts a laser scattering type. The concentration detector 44 has a range of 0~20%. The dosing pump can adopt a screw pump with a flow rate of 0~5m³ / h.

[0028] Based on the real-time feedback from the water flow regulating system 42 and the feedback from the gravity sensor 22 to the PLC controller 51, the intelligent control group dynamically calculates the proportioning concentration, and the agitator forms a uniform suspension with a concentration fluctuation of ≤±2%.

[0029] The intelligent control system includes a PLC controller 51, which connects to various sensors via a bus. The HMI 52 displays real-time curves (concentration, flow rate, and temperature). The IoT module (LAN / Wi-Fi) supports cloud access. Materials (such as cement or flour) can be replaced as needed by modifying database parameters through the HMI.

[0030] The intelligent control group has a built-in material database (50 material characteristic parameters), runs a multi-parameter collaborative control model (PID + feedforward algorithm of dosage-concentration-flow rate), and the machine learning module optimizes the control parameters every 24 hours.

[0031] An intelligent semi-wet material dosing device has a control method as follows: ‌Step 1: System Initialization‌ The operator sets the target parameters through HMI52: dosage 60kg / h, concentration 10%, and starts self-test.

[0032] The radar level meter 13 detects that the lime stock is ≥30%, and the high-frequency resonance depolymerization module 12 is on standby; the control cabin water inlet valve 42 is opened to pre-fill water to the lowest liquid level.

[0033] Step 2: Material handling and transportation The lime slides down through the silo cone to the metering and conveying assembly, and is pushed by the dual-drive screw conveyor 21 at a speed of 0.4 m / s. The gravity sensor 22 provides real-time quality feedback.

[0034] The drying and conveying component is started: the dual-mode variable frequency fan 31 delivers air at 30m³ / min, the heating wire module 311 is heated to 45°C, and the dried lime is pushed through the variable diameter spiral compacting device 33 at a speed of 0.4m / s. After being compacted by the variable diameter spiral compacting device 33, the material passes through the hydrophobic, heat-resistant and wear-resistant flexible connecting pipe 34, the humidity interceptor 35, and the outlet one-way dust blocker 36, and enters the control cabin.

[0035] Step 3: Suspended phase control and addition The PLC controller 51 automatically calculates the stirring speed based on the water flow rate (set at 10 m³ / h) and the amount of lime added; The concentration detector 44 feeds back data every 5 seconds, and the PLC controller 51 dynamically fine-tunes the opening of the water inlet valve (accuracy ±1%) to maintain the concentration within the range of 4.9-5.1%; The suspension is transported to the water treatment reaction tank through a dosing pump.

[0036] ‌Step 4: Smart Optimization and Maintenance‌ The machine learning module performs data fitting between the preset concentration and the actual concentration and optimizes the operating parameters, automatically optimizing the metering screw speed to 0.28m / s; The material blockage warning system detects abnormal vibration of the screw conveyor (>5mm / s²), triggering HMI alarm 53, which flashes red and causes the machine to shut down.

[0037] The high-frequency resonance deaggregation module 12 is activated three times per hour.

[0038] The above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art may make other changes or modifications based on the above description, and these obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. An intelligent semi-wet material dosing device, characterized by: It includes intelligent silo components, metering and conveying components, drying and conveying components, dynamic gradient suspension phase control cabin and intelligent control group; The intelligent silo assembly includes a conical silo body, a high-frequency resonance deagglomeration module, a radar level meter, and a No. 1 clean filter dust interceptor, and the high-frequency resonance deagglomeration module, the radar level meter, and the No. 1 clean filter dust interceptor are all arranged on the silo body; The metering and conveying assembly includes a dual-drive screw conveyor and a gravity sensor. The dual-drive screw conveyor is independently driven by two motors, and the gravity sensor is used to provide real-time feedback on material quality. The drying and conveying assembly includes a dual-mode variable frequency fan, an inlet one-way dust blocker, a variable diameter screw compacting device, a moisture interceptor and an outlet one-way dust blocker. The dual-mode variable frequency fan cooperates with a heating wire to achieve hot air dehumidification, and the variable diameter screw compacting device is used to compact the material. The dynamic gradient suspended phase control cabin includes a No. 2 filter dust interceptor, a cabin body, an agitator, a water inlet flow control system and a concentration detector. The water inlet flow control system is used to accurately control the water inlet volume, and the concentration detector is used to monitor the concentration of the reagent in real time. The intelligent control group includes a PLC controller, an HMI human-machine interface and an Internet of Things module, which are used to build a multi-parameter collaborative control model and realize closed-loop regulation.

2. The intelligent semi-wet material feeding device according to claim 1, characterized in that: The inner wall of the warehouse is covered with a nano-hydrophobic coating, which is made of polytetrafluoroethylene material with a thickness of 50μm. The vibration frequency of the high-frequency resonance deagglomeration module is 20kHz±5%, and the amplitude can be adjusted in the range of 0.1~0.5mm. The radar level meter has a range of 0~5m and an accuracy of ±1mm. The filtration accuracy of the No. 1 filter dust collector is 0.3μm.

3. The intelligent semi-wet material feeding device according to claim 1, characterized in that: The screw diameter of the dual-drive screw conveyor is 150 mm, the gravity sensor collects mass data every 0.1 second, and the measurement error is ≤±0.5%. The dual-drive screw conveyor is arranged in a transparent acrylic sealing cover.

4. The intelligent semi-wet material feeding device according to claim 1, characterized in that: The air volume range of the dual-mode variable frequency fan is 0~50m³ / min, the heating wire is made of nickel-chromium alloy, the humidity interceptor contains multiple silicone moisture-absorbing material tubes, the inlet one-way dust blocker and the outlet one-way dust blocker both contain check and filter structures, and the variable diameter spiral compacting device gradually densifies the material conveying process by reducing the diameter, reducing the air void ratio between materials, reducing the risk of compaction caused by moisture intrusion at the end, and making the material feeding more uniform.

5. The intelligent semi-wet material feeding device according to claim 1, characterized in that: The dynamic gradient suspended phase control cabin is provided with a No. 2 filter dust interceptor, the water inlet flow control system includes an electromagnetic regulating valve and a flow sensor, the electromagnetic regulating valve and the flow sensor are interlocked with the intelligent control group, and the concentration detector is a laser scattering type.

6. A control method for an intelligent semi-wet material dosing device, using the intelligent semi-wet material dosing device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Initialization startup: Set the target dosage and concentration through the HMI human-machine interface, and the system will self-check and detect the material inventory; Material handling and transportation: Materials slide through the intelligent silo to the metering and conveying components for precise weighing, and then are dehumidified and compacted by the drying and conveying components for transportation; Suspended phase control and dosing: Dynamically calculate the ratio concentration according to the water flow rate and material amount, stir to form a suspension and then add; Intelligent optimization and maintenance: Through machine learning, the data difference between the preset concentration and the actual concentration is fitted and the operating parameters are optimized, and the blockage risk is monitored in real time and linked protection is implemented.

7. The control method of the intelligent semi-wet material feeding device according to claim 6, characterized in that: The concentration setting range is 0~20%, and the air flow temperature of the drying and conveying component is controlled at 40~60℃. When the liquid level of the dynamic gradient suspended phase control cabin reaches the set high liquid level, or the continuous dispensing exceeds 2 hours, the metering and conveying component stops running, the water inlet flow regulation system stops taking in water, the reducing spiral stops rotating, and the dry air flow is turned on to clear and dehumidify the spiral tube. The dehumidification time of the dry air flow is about 10~30 seconds. The concentration detector feeds back data every 5 seconds, and the concentration fluctuation is controlled within ±2%.

8. The control method of the intelligent semi-wet material feeding device according to claim 7, characterized in that: When the intelligent optimization and maintenance system detects abnormal vibration of the drying and conveying component, it triggers an alarm and shuts down the machine.

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