Surface treatment modification device for powder modification
By combining a screw conveyor and heat transfer oil heating with a PLC control system, the problems of uncontrollable temperature and uneven agent activation in powder modification were solved, achieving a more efficient and uniform powder modification effect, and improving the contact efficiency of the modifier and the continuity of the modification process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU RUZHUO RUMO TECHNOLOGY CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-05-15
AI Technical Summary
In traditional powder modification processes, temperature is uncontrollable, resulting in unsatisfactory powder modification effects. Furthermore, heating methods consume a lot of energy, leading to uneven agent activation and uncontrollable mixing efficiency and quality.
The powder is dispersed by a screw conveyor and activated by heating with heat transfer oil. A PLC control system is used to precisely control the temperature and activation of the reagents. A closed-loop control of thermodynamic parameters and process quality analysis are established to achieve dynamic matching and optimization.
It achieves precise temperature control, more thorough powder dispersion, better modification effect, energy saving and more thorough contact between the agent and the powder, strong continuity of the modification process, high mixing uniformity and quality consistency, and reduces energy consumption and the risk of agglomeration of the modifier.
Smart Images
Figure CN224236832U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a surface treatment modification device for powder modification, belonging to the field of powder modification technology. Background Technology
[0002] Powder modification includes calcium carbonate powder modification, which is mainly obtained by activating the surface of heavy or light calcium carbonate, making it not only hydrophobic but also activated. Modified calcium carbonate is a widely used filler, applied in industries such as rubber, plastics, papermaking, coatings, paints, printing, cables, leather making, pharmaceuticals, and food. The production process of modified calcium carbonate is roughly the same as that of light calcium carbonate, but the carbonation process requires strict control of conditions to produce finer calcium carbonate particles, followed by surface treatment with an activator; liquid activators are usually used for activation.
[0003] Traditional powder modification processes often employ blade rotation to disperse the powder, and the heating method is generally self-friction heating, which makes the temperature uncontrollable and results in unsatisfactory powder modification effects. Summary of the Invention
[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a surface treatment modification device for powder modification. It uses a screw conveyor to disperse the powder and activates it by heating with heat transfer oil. The temperature control is more precise, the dispersion is more thorough, and it is more energy-efficient.
[0005] To achieve the above objectives, this utility model employs the following technical solution:
[0006] In a first aspect, this utility model provides a surface treatment modification device for powder modification, comprising a feeding section, a processing section, and a packaging section connected in sequence. The processing section includes a screw feeder connected to the feeding section, and a screw feeder heater is installed on the surface of the screw feeder. A chemical storage tank and a hot kerosene storage tank are provided on one side of the screw feeder. A chemical pipe heater is provided on the outlet pipe of the chemical storage tank. The oil outlet of the hot kerosene storage tank is connected to the screw feeder heater. A mixing and processing machine is provided below the outlet of the screw feeder. A modified screw conveyor is provided below the outlet of the mixing and processing machine. The outlet of the modified screw conveyor is connected to the packaging section through a conveying pipe.
[0007] Furthermore, the feeding section includes a bucket elevator, the lower end of which is the feeding port and the upper end is the discharging port. The discharging port of the bucket elevator is connected to a raw material storage tank, and the lower end of the raw material storage tank is connected to the feeding port of the screw feeder via a feeding screw conveyor.
[0008] Furthermore, an air hammer is installed at the bottom of the raw material storage tank.
[0009] Furthermore, the packaging section includes a pulsating bag filter, the inlet of which is connected to the outlet of the conveying pipe, and a discharge fan and a rotary valve discharge machine are respectively installed in the middle and bottom of the pulsating bag filter, with the outlet of the rotary valve discharge machine connected to an automatic packaging machine.
[0010] Furthermore, the upper part of the pulsating bag filter is connected to a platform railing with a silencer via a ladder.
[0011] Furthermore, the medicine storage tank and the hot kerosene storage tank are installed on one side of the screw feeder via a frame.
[0012] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:
[0013] In this solution, the powder is dispersed by a screw conveyor and activated by heating with heat transfer oil. This results in more precise temperature control, more thorough dispersion, greater energy savings, and better modification effect. At the same time, the agent addition method is also equipped with a water pipe heater to atomize the agent before it comes into contact with the powder, which ensures that the modifier comes into contact with the powder more thoroughly. The entire modification process is uninterrupted, and the modification time and speed can be controlled by the screw conveyor. Attached Figure Description
[0014] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:
[0015] Figure 1 This is a schematic diagram of a surface treatment modification device for powder modification provided in an embodiment of the present invention;
[0016] In the diagram: 1. Hoist; 2. Raw material storage tank; 3. Air hammer; 4. Feed screw conveyor; 5. Screw feeder; 6. Screw feeder heater; 7. Chemical storage tank; 8. Chemical pipe heater; 9. Hot kerosene storage tank; 10. Mixing and processing machine; 11. Modified screw conveyor; 12. Conveying piping; 13. Pulsating bag filter; 14. Discharge fan; 15. Material level controller; 16. Rotary valve discharge machine; 17. Automatic packaging machine; 18. Ladder; 19. Silencer; 20. Platform railing. Detailed Implementation
[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.
[0018] The following detailed description is exemplary and intended to provide further detailed explanation of the present invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this invention.
[0019] Example:
[0020] Please see Figure 1 This embodiment provides a surface treatment modification apparatus for powder modification, including a feeding section, a processing section, and a packaging section, wherein:
[0021] The feeding section includes a bucket elevator 1, a raw material storage tank 2, an air hammer 3, and a feeding screw conveyor 4. The lower end of the bucket elevator 1 is the feeding port and the upper end is the discharging port. The upper end of the raw material storage tank 2 is connected to the discharging port of the bucket elevator 1. The air hammer 3 is installed at the lower part of the raw material storage tank 2. The lower end of the raw material storage tank 2 corresponds to the beginning of the feeding screw conveyor 4, and the end discharging port of the feeding screw conveyor 4 corresponds to the processing section.
[0022] The processing unit includes a screw feeder 5, a screw feeder heater 6, a chemical storage tank 7, a chemical pipe heater 8, a hot kerosene storage tank 9, a mixing and processing machine 10, a modified screw conveyor 11, and a conveying pipe 12. The end of the feed screw conveyor 4 corresponds to the beginning of the screw feeder 5. The screw feeder heater 6 is installed at the screw feeder 5. The chemical storage tank 7 and the hot kerosene storage tank 9 are installed on one side of the screw feeder 5 through a frame. The chemical pipe heater 8 is located at the outlet pipe of the chemical storage tank 7. The oil outlet of the hot kerosene storage tank 9 is connected to the screw feeder heater 6 through a hot kerosene pump and a pipeline. The mixing and processing machine 10 is located below the outlet of the screw feeder 5. The modified screw conveyor 11 is located below the outlet of the mixing and processing machine 10. The outlet of the modified screw conveyor 11 is connected to the packaging unit through the conveying pipe 12.
[0023] The packaging section includes a pulse bag filter 13, a discharge fan 14, a material level controller 15, a rotary valve discharge machine 16, an automatic packaging machine 17, a ladder 18, a silencer 19, and a platform railing 20. The inlet of the pulse bag filter 13 is connected to the outlet of the conveying pipe 12. The discharge fan 14, the material level controller 15, and the rotary valve discharge machine 16 are respectively located in the middle, lower, and bottom of the pulse bag filter 13. The automatic packaging machine 17 is connected to the rotary valve discharge machine 16. The upper part of the pulse bag filter 13 is connected to the platform railing 20 with a silencer 19 via the ladder 18.
[0024] The powder to be modified enters the raw material storage tank 2 via the bucket elevator 1. Under the action of the air hammer 3, the powder in the raw material storage tank 2 falls into the feed screw conveyor 4, and then is conveyed to the screw feeder 5. The powder in the screw feeder 5 is heated by the screw feeder heater 6. A hot kerosene storage tank 9 set next to the screw feeder 5 provides a heat source to the screw feeder heater 6 through a pipeline. A chemical storage tank 7 is set next to the screw feeder 5. The chemical in the chemical storage tank 7 is pre-treated before being added to the screw feeder 5. The agent is activated and dispersed by heating the water heater 8. The agent and modifier are mixed at the right end of the screw feeder 5 and then enter the mixing machine 10 for further mixing. Finally, the modified screw conveyor 11 enters the pulse bag filter 13 through the conveying pipe 12 for the next step of packaging. The pulse bag filter 13 is equipped with a cooling fan 14 in the middle and a material level controller 15 at the bottom. The bottom of the pulse bag filter 13 is connected to the automatic packaging machine 17 through the rotary valve discharge machine 16.
[0025] It should be noted that traditional blade-driven powder dispersing typically uses self-friction heating, which results in uncontrollable temperature. In this solution, the powder is dispersed using a screw conveyor and activated by heating with heat transfer oil. This method offers more precise temperature control, more thorough dispersing, and greater energy efficiency. Furthermore, the agent addition process is equipped with a chemical water pipe heater, which atomizes the agent before it comes into contact with the powder, ensuring more complete contact between the modifier and the powder. The entire modification process is uninterrupted, and the modification time and speed can be controlled via the screw conveyor.
[0026] To address the problems of low heat source utilization, uneven reagent activation, and uncontrollable mixing efficiency and quality in powder modification processes, this solution introduces a PLC control system, constructing a powder modification system based on closed-loop control of thermodynamic parameters and process quality analysis. The system focuses on designing algorithm models for three key aspects: dynamic heat source matching, reagent activation control, and real-time monitoring of mixing uniformity, achieving self-optimization of process parameters.
[0027] The thermodynamic coupling model of the hot kerosene storage tank and the screw feeder heater calculates the heat source efficiency ratio in real time and dynamically adjusts the kerosene flow rate and screw conveyor speed, breaking through the traditional fixed heating mode and improving the hot kerosene heating efficiency ratio (η). h The formula is obtained through calculation by the PLC control system:
[0028]
[0029] Where: K is the heat transfer coefficient of the screw feeder heater (W / m) 2 ·K), derived from the equipment thermodynamics handbook; A is the effective heat exchange area (m²). 2The calculation is based on the spiral blade structure model; ΔT is the temperature difference (K) between the hot kerosene entering and exiting the heater, which is collected in real time by a temperature sensor; Q oil The volumetric flow rate of thermal kerosene (m³) 3 / s), measured by a flow meter; c oil The specific heat capacity of kerosene (J / kg·K) is taken as the standard physical property value of 1.93×10⁻⁶. 3 ;ρ oil Density of kerosene (kg / m³) 3 ), take the standard value of 810. When η h When the efficiency is less than 85%, the PLC will adjust the speed of the hot kerosene pump and the motor frequency of the screw feeder to ensure that the thermal efficiency is maintained above the threshold.
[0030] The temperature gradient control algorithm for the drug activation process combines drug physical parameters and dispersibility efficiency to establish an activation temperature compensation equation, eliminating the risk of drug agglomeration. The drug activation temperature compensation value (ΔT) is calculated. d The formula is obtained through the chemical activation control module embedded in the PLC:
[0031]
[0032] In the formula: E dis t is the input power (W) of the chemical tube heater, collected by a power meter; t is the residence time (s) of the chemical in the heating tube, calculated by reverse calculation based on the rotational speed of the feed screw conveyor; m med The mass flow rate of the reagent (kg / s) is obtained in real time through the weighing module; c med d is the specific heat capacity of the reagent (J / kg·K), obtained by laboratory DSC testing; d0 is the initial agglomerate particle size (μm), measured by an online image analyzer; d target The target particle size (μm) is set to ≤50; α is an empirical correction coefficient, taken as 0.25 (fitted from 30 sets of experimental data). When ΔT d When the temperature exceeds 15K, the set temperature of the medicine pipe heater is automatically increased, and the vibration frequency of the air hammer is increased to ensure that the medicine is fully activated.
[0033] The online evaluation system for mixing uniformity within the mixer is based on multi-dimensional particle size distribution data to construct a quality index, guiding the adjustment of mixing parameters and improving the coating rate of the modifier. The Mixing Quality Index (MQI) is calculated by the PLC control system, and the formula is:
[0034]
[0035] In the formula: σ i denoted as xi, representing the standard deviation (μm) of powder particle size within the i-th sampling period, measured online by a laser particle size analyzer; μ is the mean particle size of the sample (μm); xi ix is the current stirring shaft speed (rpm); opt The theoretical optimal rotational speed (rpm) is calculated based on the powder bulk density; β is the weighting coefficient, set to 0.02 (determined through DOE experiments); N is the number of consecutive samples, defaulting to 5. When MQI is greater than 0.8, the frequency converter adjustment program of the mixing machine is triggered, and the modified screw conveyor is linked to change the discharge speed to ensure that the mixing uniformity meets the standard.
[0036] In summary, this solution achieves dynamic matching of heating parameters and system-level energy efficiency optimization through a thermodynamic coupling model, reducing ineffective heat loss compared to traditional processes. The temperature gradient algorithm overcomes the limitations of reagent property differences, enabling precise control of the activation process and eliminating modifier agglomeration caused by insufficient activation. Based on real-time MQI index adjustments, equipment parameters are adjusted to complete closed-loop quality management, ensuring batch-to-batch quality consistency and avoiding powder breakage caused by over-mixing. The linkage strategy between the level controller and the rotary valve discharger, combined with MQI data to predict powder flowability, reduces the risk of material blockage in the packaging line.
[0037] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.
[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.
Claims
1. A surface treatment modification apparatus for powder modification, characterized in that, The system includes a feeding section, a processing section, and a packaging section connected in sequence. The processing section includes a screw feeder (5) connected to the feeding section, and a screw feeder heater (6) is installed on the surface of the screw feeder (5). A medicine storage tank (7) and a hot kerosene storage tank (9) are provided on one side of the screw feeder (5). A medicine pipe heater (8) is provided on the medicine outlet pipe of the medicine storage tank (7). The oil outlet of the hot kerosene storage tank (9) is connected to the screw feeder heater (6). A mixing and processing machine (10) is provided below the outlet of the screw feeder (5). A modified screw conveyor (11) is provided below the outlet of the mixing and processing machine (10). The outlet of the modified screw conveyor (11) is connected to the packaging section through a conveying pipe (12).
2. The surface treatment modification apparatus for powder modification according to claim 1, characterized in that, The feeding section includes a bucket elevator (1), the lower end of which is the feeding port and the upper end is the discharging port. The discharging port of the bucket elevator (1) is connected to a raw material storage tank (2), and the lower end of the raw material storage tank (2) is connected to the feeding port of the screw feeder (5) through a feeding screw conveyor (4).
3. The surface treatment modification apparatus for powder modification according to claim 2, characterized in that, An air hammer (3) is installed at the bottom of the raw material storage tank (2).
4. The surface treatment modification apparatus for powder modification according to claim 1, characterized in that, The packaging section includes a pulsating bag filter (13), the inlet of which is connected to the outlet of a conveying pipe (12), and the middle and bottom of the pulsating bag filter (13) are respectively provided with a discharge fan (14) and a rotary valve discharge machine (16), and the outlet of the rotary valve discharge machine (16) is connected to an automatic packaging machine (17).
5. The surface treatment modification apparatus for powder modification according to claim 4, characterized in that, The upper part of the pulsating bag filter (13) is connected to a platform railing (20) with a silencer (19) via a ladder (18).
6. The surface treatment modification apparatus for powder modification according to claim 1, characterized in that, The medicine storage tank (7) and the hot kerosene storage tank (9) are installed on one side of the screw feeder (5) via a frame.