Continuous shearing device for superfine nitroguanidine
By designing a continuous shearing device for ultrafine nitroguanidine, and utilizing a multi-stage spiral stirring shearing machine and a particle size analyzer, the problems of single particle size and difficult reaction control in existing devices were solved, achieving efficient continuous production and stable product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGXIA BELITE BIOTECHNOLOGY CO LTD
- Filing Date
- 2025-03-27
- Publication Date
- 2026-04-21
AI Technical Summary
Existing equipment for preparing ultrafine nitroguanidine suffers from problems such as uniform particle size, inability to continuously feed and discharge materials, and difficulty in reaction control, resulting in low production efficiency and unstable product quality.
Design a continuous shearing device for ultrafine nitroguanidine, including a mixing and batching tank, a spiral mixing shearing machine and a control device. Through multi-stage spiral mixing shearing and real-time monitoring by a portable particle size analyzer, continuous feeding and discharging and particle size control are achieved.
It improves shearing efficiency, enables multiple selections of product particle size, ensures the stability of the production process and product quality, and reduces equipment footprint and operational difficulty.
Smart Images
Figure CN224142072U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of chemical equipment technology, and in particular to a continuous shearing device for ultrafine nitroguanidine. Background Technology
[0002] Nitroguanidine, as an important industrial raw material, is widely used in military, civilian, and pharmaceutical industries. In the production process of nitroguanidine, the raw material needs to be stirred, conveyed, and sheared to ensure its uniformity and particle size meet requirements. Currently, the preparation of ultrafine nitroguanidine typically uses a batch-type shearing device. However, this shearing device suffers from problems such as uniform particle size, inability to continuously feed and discharge materials, and difficulty in reaction control. Specifically, the sheared nitroguanidine particles have a uniform size, failing to meet the diverse particle size requirements of different customers; the reaction process is intermittent, making continuous production impossible, resulting in low production efficiency; and it is difficult to precisely control the flow rate and particle size during the nitroguanidine material conveying process, and the shearing frequency during the reaction is also difficult to precisely control, affecting the stability of product quality. Utility Model Content
[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a continuous shearing device for ultrafine nitroguanidine, which has high shearing efficiency, easy control of the reaction process, and can realize continuous feeding and discharging, while the product particle size can be selected in multiple ways.
[0004] This application provides a continuous shearing device for ultrafine nitroguanidine, comprising: a mixing and batching tank, a first material conveying pipeline, a material control valve, a material flow meter, a material discharge pipeline, a shearing mechanism, and a control device;
[0005] The mixing tank is used for mixing and storing nitroguanidine. The output end of the mixing tank is connected to the input end of the first material conveying pipeline. The material control valve and the material flow meter are both located on the first material conveying pipeline. The material control valve is located near the output end of the mixing tank, and the material flow meter is located between the material control valve and the output end of the first material conveying pipeline.
[0006] The shearing mechanism includes a primary spiral mixing shearing machine, a secondary spiral mixing shearing machine, a tertiary spiral mixing shearing machine, a first three-way valve, a second three-way valve, and a third three-way valve. Each of the primary, secondary, and tertiary spiral mixing shearing machines includes spiral mixing blades, a mixing shaft, a drive mechanism, and a mixing tank. The spiral mixing blades are fixedly mounted on the mixing shaft, and the drive mechanism is connected to the mixing shaft. Both the mixing shaft and the spiral mixing blades are located in the mixing tank, and the drive mechanism is located at the top of the mixing tank. Each mixing tank is equipped with a portable particle size analyzer. The output end of the first material conveying pipeline is connected to the mixing tank corresponding to the primary spiral mixing shearing machine.
[0007] The output end of the mixing tank corresponding to the first-stage spiral mixing and shearing machine is connected to the input end of the mixing tank corresponding to the second-stage spiral mixing and shearing machine through the inlet end and the first outlet end of the first three-way valve, and the second outlet end of the first three-way valve is connected to the input end of the material discharge pipeline; the output end of the mixing tank corresponding to the second-stage spiral mixing and shearing machine is connected to the input end of the mixing tank corresponding to the third-stage spiral mixing and shearing machine through the inlet end and the first outlet end of the second three-way valve, and the second outlet end of the second three-way valve is connected to the input end of the material discharge pipeline; the output end of the mixing tank corresponding to the third-stage spiral mixing and shearing machine is connected to the input end of the material discharge pipeline through the inlet end and the first outlet end of the third three-way valve, and the second outlet end of the third three-way valve is connected to the input end of the mixing and batching tank;
[0008] The control device includes a frequency converter and a control mechanism. The frequency converter is connected to the control mechanism. The control mechanism is also connected to the material control valve, the material flow meter, the first three-way valve, the second three-way valve, and the third three-way valve. The control mechanism is also connected to each of the portable particle size analyzers. The frequency converter is also connected to each of the drive mechanisms.
[0009] According to some embodiments of this application, the continuous shearing device for ultrafine nitroguanidine further includes a cooling water circulation system, which includes a cooling water tank, a circulation pump, and a cooling water delivery pipeline. Each of the stirring shafts is a hollow stirring shaft, and a cooling water channel is formed inside the stirring shaft. One end of the cooling water delivery pipeline is connected to the cooling water tank, and the other end of the cooling water delivery pipeline is connected to each of the stirring shafts. The circulation pump is located on the cooling water delivery pipeline and is connected to the control mechanism.
[0010] According to some embodiments of this application, the cooling water delivery pipeline includes a circulating water input pipeline and a circulating water output pipeline. The input end of the circulating water input pipeline is connected to the cooling water tank, the output end of the circulating water input pipeline is connected to the input end of each of the stirring shafts, the input end of the circulating water output pipeline is connected to the output end of each of the stirring shafts, the output end of the circulating water output pipeline is connected to the cooling water tank, and the circulating pump is located on the circulating water input pipeline.
[0011] According to some embodiments of this application, the continuous shearing device for ultrafine nitroguanidine further includes a first temperature detector, a second temperature detector, and a third temperature detector. The first temperature detector is located at the output end of the stirring shaft corresponding to the first-stage spiral stirring shearing machine, the second temperature detector is located at the output end of the stirring shaft corresponding to the second-stage spiral stirring shearing machine, and the third temperature detector is located at the output end of the stirring shaft corresponding to the third-stage spiral stirring shearing machine. The control mechanism is also connected to the first temperature detector, the second temperature detector, and the third temperature detector respectively.
[0012] According to some embodiments of this application, the shearing mechanism further includes a second material conveying pipeline, the inlet end of the first three-way valve is connected to the output end of the mixing tank corresponding to the first-stage spiral mixing shear, the first outlet end of the first three-way valve is connected to the input end of the second material conveying pipeline, and the output end of the second material conveying pipeline is connected to the input end of the mixing tank corresponding to the second-stage spiral mixing shear.
[0013] According to some embodiments of this application, each of the drive mechanisms includes a rotary motor and a reducer, wherein the rotary motor is connected to the corresponding stirring shaft through the reducer.
[0014] According to some embodiments of this application, the shearing mechanism further includes a third material conveying pipeline, the inlet end of the second three-way valve is connected to the output end of the mixing tank corresponding to the secondary spiral mixing shear, the first outlet end of the second three-way valve is connected to the input end of the third material conveying pipeline, and the output end of the third material conveying pipeline is connected to the input end of the mixing and batching tank.
[0015] According to some embodiments of this application, the shearing mechanism further includes a fourth material conveying pipeline, the inlet end of the third three-way valve is connected to the output end of the mixing tank corresponding to the three-stage spiral mixing shear, the first outlet end of the third three-way valve is connected to the input end of the fourth material conveying pipeline, and the output end of the fourth material conveying pipeline is connected to the input end of the mixing and batching tank.
[0016] In this application, the mixing and batching tank is used for the mixing and storage of nitroguanidine, ensuring uniform mixing of materials. This application integrates mixing, conveying, and shearing functions to achieve integrated operation of nitroguanidine production, reducing equipment footprint and improving production efficiency. By setting up material control valves and material flow meters, the material conveying flow rate can be precisely controlled, ensuring the stability of the production process. By setting up a three-stage spiral mixing and shearing machine and a portable particle size analyzer, fine shearing and real-time monitoring of nitroguanidine particles can be achieved, ensuring product quality. Automated control is achieved through a control device, reducing manual intervention and lowering operational difficulty and production costs. The application includes a three-stage spiral mixing and shearing machine. The shear strength of the spiral stirring blades increases progressively to achieve a progressively smaller particle size. Through a three-stage spiral stirring shearing process (first-stage, second-stage, and third-stage), nitroguanidine is sheared step-by-step, achieving precise control of the ultrafine nitroguanidine particle size. A portable particle size analyzer detects the nitroguanidine particle size and sends the results to the control mechanism. Based on the results, the control mechanism selects whether the material enters the next stage or is discharged directly. If the final stage fails to meet the particle size requirements, the liquid can be returned to the mixing tank for reprocessing until the detected nitroguanidine particle size meets the preset requirements. This design, including the three-way valve and portable particle size analyzer, allows for flexible adjustment of the material flow direction based on real-time detection results, ensuring the product particle size meets the requirements. This application achieves high shearing efficiency, easy control of the reaction process, continuous feeding and discharging, and multiple selectable product particle sizes.
[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0018] Additional aspects and advantages of this application will become apparent and readily understood in conjunction with the following description of the embodiments, in which:
[0019] Figure 1 This is a schematic diagram of the structure of the continuous shearing device for ultrafine nitroguanidine provided in the embodiments of this application;
[0020] Figure 2 This is a schematic diagram showing the connection relationship between the various components and the control device provided in the embodiments of this application.
[0021] Figure label:
[0022] 100 mixing and batching tank, 110 mixing paddle, 120 mixing motor, 130 first material conveying pipeline, 140 material control valve, 150 material flow meter, 160 material discharge pipeline;
[0023] Shearing mechanism 200, primary spiral mixing shear 210, primary spiral mixing blade 211, primary mixing shaft 212, primary mixing tank 213, secondary spiral mixing shear 220, secondary spiral mixing blade 221, secondary mixing shaft 222, secondary mixing tank 223, tertiary spiral mixing shear 230, tertiary spiral mixing blade 231, tertiary mixing shaft 232, tertiary mixing tank 233, first three-way valve 241, second three-way valve 242, third three-way valve 243, second material conveying pipeline 251, third material conveying pipeline 252, fourth material conveying pipeline 253. Detailed Implementation
[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0025] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0026] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.
[0027] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.
[0028] Nitroguanidine, as an important industrial raw material, is widely used in military, civilian, and pharmaceutical industries. In the production process of nitroguanidine, the raw material needs to be stirred, conveyed, and sheared to ensure its uniformity and particle size meet requirements. Currently, the preparation of ultrafine nitroguanidine typically uses a batch-type shearing device. However, this shearing device suffers from problems such as uniform particle size, inability to continuously feed and discharge materials, and difficulty in reaction control. Specifically, the sheared nitroguanidine particles have a uniform size, failing to meet the diverse particle size requirements of different customers; the reaction process is intermittent, making continuous production impossible, resulting in low production efficiency; and it is difficult to precisely control the flow rate and particle size during the nitroguanidine material conveying process, and the shearing frequency during the reaction is also difficult to precisely control, affecting the stability of product quality.
[0029] To address the aforementioned problems, this application proposes a continuous shearing device for ultrafine nitroguanidine. The embodiments of this application will be further described below with reference to the accompanying drawings.
[0030] Reference Figures 1 to 2This application provides a continuous shearing device for ultrafine nitroguanidine, including a mixing and batching tank 100, a first material conveying pipeline 130, a material control valve 140, a material flow meter 150, a material discharge pipeline 160, a shearing mechanism 200, and a control device. The mixing and batching tank 100 is used for mixing and storing nitroguanidine. The output end of the mixing and batching tank 100 is connected to the input end of the first material conveying pipeline 130. The material control valve 140 and the material flow meter 150 are both located on the first material conveying pipeline 130, with the material control valve 140 located near the output end of the mixing and batching tank 100, and the material flow meter 150 located near the material control valve 140. Between 0 and the output end of the first material conveying pipeline 130; the shearing mechanism 200 includes a first-stage spiral mixing shear 210, a second-stage spiral mixing shear 220, a third-stage spiral mixing shear 230, a first three-way valve 241, a second three-way valve 242, and a third three-way valve 243. Each of the first-stage spiral mixing shear 210, second-stage spiral mixing shear 220, and third-stage spiral mixing shear 230 includes spiral mixing blades, a mixing shaft, a drive mechanism, and a mixing tank. The spiral mixing blades are fixedly mounted on the mixing shaft, and the drive mechanism is connected to the mixing shaft. Both the mixing shaft and the spiral mixing blades are located in the mixing tank, and the drive mechanism is located at the top of the mixing tank. Each mixing tank is equipped with a portable... The particle size analyzer connects the output end of the first material conveying pipeline 130 to the mixing tank corresponding to the first-stage spiral mixing shear 210. The output end of the mixing tank corresponding to the first-stage spiral mixing shear 210 is connected to the input end of the mixing tank corresponding to the second-stage spiral mixing shear 220 via the inlet and outlet ends of the first three-way valve 241. The second outlet end of the first three-way valve 241 is connected to the input end of the material discharge pipeline 160. The output end of the mixing tank corresponding to the second-stage spiral mixing shear 220 is connected to the input end of the mixing tank corresponding to the third-stage spiral mixing shear 230 via the inlet and outlet ends of the second three-way valve 242. The outlet end is connected to the input end of the material discharge pipeline 160; the output end of the mixing tank corresponding to the three-stage spiral mixing shear machine 230 is connected to the input end of the material discharge pipeline 160 through the inlet end and the first outlet end of the third three-way valve 243, and the second outlet end of the third three-way valve 243 is connected to the input end of the mixing and batching tank 100; the control device includes a frequency converter and a control mechanism. The frequency converter is connected to the control mechanism, and the control mechanism is also connected to the material control valve 140, the material flow meter 150, the first three-way valve 241, the second three-way valve 242, and the third three-way valve 243 respectively. The control mechanism is also connected to each portable particle size analyzer, and the frequency converter is also connected to each drive mechanism.
[0031] It should be noted that the mixing tank 100 is equipped with a stirring paddle 110, which is connected to a stirring motor 120. The stirring motor 120 is connected to a control mechanism. The control mechanism is used to drive the stirring paddle 110 to rotate via the stirring motor 120, so as to stir the nitroguanidine material in the mixing tank 100. After the nitroguanidine is uniformly mixed, the material is transported through the first material conveying pipeline 130 to the mixing tank corresponding to the first-stage spiral mixing shear machine 210 via the output end of the mixing tank 100. The material flow meter 150 is used to monitor the flow rate of the material conveyed in the first material conveying pipeline 130 in real time and generate a flow detection signal. The flow detection signal is then sent to the control mechanism. The control mechanism controls the opening of the material control valve 140 according to the flow detection signal to control the material flow rate and prevent excessive or insufficient material conveying.
[0032] It should be noted that the first-stage spiral mixing shear 210 is used for initial shearing of materials to refine particle size; the second-stage spiral mixing shear 220 is used for further shearing of materials to refine them; and the third-stage spiral mixing shear 230 is used to control the flow direction of materials to achieve multi-stage shearing or direct discharge.
[0033] It should be noted that the spiral mixing blades are fixed on the mixing shaft and rotate with the shaft to shear the material; the mixing shaft is used to connect the drive mechanism and the spiral mixing blades to transmit power; the drive mechanism is used to provide power to drive the mixing shaft to rotate; the mixing tank is used to contain the material and the mixing components and provide shearing space; the portable particle size analyzer is used to detect the particle size of the material through a sensor and feed the detection result back to the control mechanism. The control mechanism is used to determine whether the particle size of the material meets the preset target particle size based on the detection result. If it does, it is output to the target material collection mechanism through the material discharge pipeline 160. If it does not meet, it is continued to be transported to the next stage spiral mixing shear 210 for further shearing; when the material sheared by the three-stage spiral mixing shear 230 does not reach the preset target particle size, the control mechanism controls the material in the three-stage spiral mixing shear 230 to be transported to the mixing and batching tank 100 through the second output end of the third three-way valve 243 for re-mixing until the particle size detection result obtained by the corresponding portable particle size analyzer meets the preset target particle size.
[0034] It should be noted that the portable particle size analyzer should be installed in a position inside the mixer that represents the overall particle size distribution, avoiding proximity to the helical mixing blades or walls, and should be secured with appropriate clamps or brackets to ensure stability.
[0035] It should be noted that the control mechanism controls the rotational speed of the drive mechanism through a frequency converter, thereby controlling the rotational speed of the corresponding spiral mixing shear.
[0036] It should be noted that, referring to Figures 1 to 2The first-stage spiral mixing shear machine 210 has spiral mixing blades 211, mixing shaft 212, mixing tank 213, and driving mechanism, respectively. The second-stage spiral mixing shear machine 220 has spiral mixing blades 221, mixing shaft 222, driving mechanism, and mixing tank, respectively. The third-stage spiral mixing shear machine 230 has spiral mixing blades 231, mixing shaft 232, driving mechanism, and mixing tank, respectively. The first-stage spiral mixing shear machine 210, the second-stage spiral mixing shear machine 220, and the third-stage spiral mixing shear machine 230 are progressively advanced in function, structure, and processing effect, respectively suitable for different process stages and production needs. The first-stage spiral mixing shear machine 210 is used for the preliminary treatment of nitroguanidine, its main function being coarse mixing and preliminary shearing of the nitroguanidine raw material. It processes larger nitroguanidine particles and has relatively lower requirements for mixing uniformity, its main purpose being to provide pre-treated nitroguanidine material for subsequent processes. The second-stage spiral mixing shear machine 220 is used for the intermediate treatment of nitroguanidine material, further mixing and refining the shearing of the first-stage treated nitroguanidine. Its processing effect is finer than the first stage, with smaller nitroguanidine particles and higher mixing uniformity. The third-stage spiral mixing shear machine 230 is used for the final treatment of nitroguanidine material, its main function being high-precision mixing and ultra-fine shearing of nitroguanidine. It processes even smaller nitroguanidine particles and has the highest requirements for mixing uniformity, typically used for producing high-quality or high-uniformity ultra-fine nitroguanidine. The first-stage spiral mixing shear machine 210 has a relatively simple structure. The spiral blade design focuses more on conveying and initially shearing large particles. The stirring shaft has a low rotation speed and moderate shearing force to meet the needs of coarse processing. The second-stage spiral mixing shear machine 220 has a more complex structure than the first stage. The spiral blade design focuses more on refining materials and uniform mixing. The stirring shaft has a higher rotation speed and stronger shearing force to meet the requirements of intermediate processing. The third-stage spiral mixing shear machine 230 has the most complex structure. The spiral blade design focuses more on high-precision shearing and uniform dispersion. The stirring shaft has the highest rotation speed and the greatest shearing force to meet the high standards of final processing.
[0037] In this application, the mixing and batching tank 100 is used for mixing and storing nitroguanidine, ensuring uniform mixing of materials. This application integrates mixing, conveying, and shearing functions to achieve integrated operation of nitroguanidine production, reducing equipment footprint and improving production efficiency. By setting up a material control valve 140 and a material flow meter 150, the material conveying flow can be precisely controlled, ensuring the stability of the production process. By setting up a three-stage spiral mixing and shearing machine 230 and a portable particle size analyzer, fine shearing and real-time monitoring of nitroguanidine particles can be achieved, ensuring product quality. Automated control is achieved through the control device, reducing manual intervention, lowering operational difficulty and production costs. The application includes a first-stage spiral mixing and shearing machine 210, a second-stage spiral mixing and shearing machine 220, and a third-stage spiral mixing and shearing machine... The shearing intensity of the spiral stirring blades in the shearing machine 230 increases progressively to achieve a progressively smaller particle size. Through the setup of a first-stage spiral stirring shearing machine 210, a second-stage spiral stirring shearing machine 220, and a third-stage spiral stirring shearing machine 230, nitroguanidine is sheared in stages, achieving precise control of the ultrafine nitroguanidine particle size. A portable particle size analyzer is used to detect the nitroguanidine particle size and send the detection results to the control mechanism. The control mechanism selects whether the material enters the next stage or is directly discharged based on the detection results. If the particle size requirement is not met in the last stage, the liquid can be returned to the mixing and batching tank 100 for reprocessing until the detected nitroguanidine particle size meets the preset requirements. This design, including the three-way valve and the portable particle size analyzer, allows for flexible adjustment of the material flow direction based on real-time detection results, ensuring that the product particle size meets the requirements. This application achieves high shearing efficiency, easy control of the reaction process, continuous feeding and discharging, and multiple selectable product particle sizes.
[0038] Reference Figure 2 It is understandable that the continuous shearing device for ultrafine nitroguanidine also includes a cooling water circulation system, which includes a cooling water tank, a circulation pump, and a cooling water delivery pipeline. Each stirring shaft is a hollow stirring shaft, and a cooling water channel is formed inside the stirring shaft. One end of the cooling water delivery pipeline is connected to the cooling water tank, and the other end of the cooling water delivery pipeline is connected to each stirring shaft. The circulation pump is located on the cooling water delivery pipeline and is connected to the control mechanism.
[0039] It should be noted that during the continuous shearing process of ultrafine nitroguanidine, the stirring shaft and blades of the spiral stirring shearer generate a large amount of heat due to high-speed rotation and material friction. If the temperature is too high, it may lead to thermal decomposition or property changes of the nitroguanidine material, affecting product quality. This application utilizes the cooling water channel inside the hollow stirring shaft, which allows the cooling water to absorb and remove the heat generated by the stirring shaft and blades, thereby effectively controlling the temperature inside the mixing tank and ensuring process stability. High-temperature environments accelerate the aging and wear of equipment components (such as stirring shaft, bearings, seals, etc.), reducing the service life of the equipment. The cooling water circulation system set up in this application also serves to reduce the temperature of the stirring shaft and drive mechanism through cooling water circulation, thereby reducing wear and damage caused by high temperatures and extending the service life of the equipment.
[0040] Reference Figure 1 It is understood that the cooling water delivery pipeline includes a circulating water input pipeline and a circulating water output pipeline. The input end of the circulating water input pipeline is connected to the cooling water tank, the output end of the circulating water input pipeline is connected to the input end of each stirring shaft, the input end of the circulating water output pipeline is connected to the output end of each stirring shaft, and the output end of the circulating water output pipeline is connected to the cooling water tank. The circulating pump is located on the circulating water input pipeline.
[0041] It should be noted that during the continuous shearing process of ultrafine nitroguanidine, the stirring shaft and blades of the spiral stirring shearer generate a large amount of heat due to high-speed rotation and material friction. If the temperature is too high, it may lead to thermal decomposition or property changes of the nitroguanidine material, affecting product quality. This application utilizes the cooling water channel inside the hollow stirring shaft, allowing the cooling water to absorb and remove the heat generated by the stirring shaft and blades, thereby effectively controlling the temperature inside the mixing tank and ensuring process stability. High-temperature environments accelerate the aging and wear of equipment components (such as stirring shaft, bearings, seals, etc.), reducing the service life of the equipment. The cooling water circulation system set up in this application also has the function of reducing the temperature of the stirring shaft and drive mechanism through cooling water circulation, reducing wear and damage caused by high temperature, and extending the service life of the equipment. The cooling water circulation system of this application adopts a circulating water design to reduce water waste. The circulating pump transports cooling water from the cooling water tank to the stirring shaft, absorbs heat, and then returns to the cooling water tank, realizing the recycling of cooling water and reducing energy and water consumption.
[0042] Reference Figure 2It is understood that the continuous shearing device for ultrafine nitroguanidine also includes a first temperature detector, a second temperature detector, and a third temperature detector. The first temperature detector is located at the output end of the stirring shaft corresponding to the first-stage spiral stirring shear 210, the second temperature detector is located at the output end of the stirring shaft corresponding to the second-stage spiral stirring shear 220, and the third temperature detector is located at the output end of the stirring shaft corresponding to the third-stage spiral stirring shear 230. The control mechanism is also connected to the first temperature detector, the second temperature detector, and the third temperature detector respectively.
[0043] It should be noted that after the nitroguanidine raw material is mixed in the mixing tank 100, it enters the primary spiral mixing and shearing machine 210 through the first material conveying pipeline 130. The material undergoes continuous shearing in the primary, secondary, and tertiary spiral mixing and shearing machines 230, and the particle size gradually decreases. A portable particle size analyzer monitors the particle size distribution in real time, and the control mechanism adjusts the mixing speed and material flow rate according to the test results. The cooling water circulation system controls the temperature through the cooling water channel in the mixing shaft to ensure process stability. The temperature detector monitors the temperature in real time and outputs the detected temperature data to the control mechanism, which adjusts the cooling water flow rate according to the temperature data. The material is circulated or discharged through a three-way valve to ensure that the particle size reaches the ultrafine level.
[0044] Reference Figure 1 It is understood that the shearing mechanism 200 also includes a second material conveying pipeline 251, the inlet end of the first three-way valve 241 is connected to the output end of the mixing tank corresponding to the first-stage spiral mixing shear 210, the first outlet end of the first three-way valve 241 is connected to the input end of the second material conveying pipeline 251, and the output end of the second material conveying pipeline 251 is connected to the input end of the mixing tank corresponding to the second-stage spiral mixing shear 220.
[0045] It should be noted that, through the first three-way valve 241 and the second material conveying pipeline 251, the material processed by the first-stage spiral mixing shear 210 can be diverted and conveyed to the second-stage spiral mixing shear 220, thus optimizing the production process. This design reduces the equipment footprint and the complexity of material transmission by making reasonable use of conveying pipelines and valves, thereby reducing equipment costs and maintenance difficulties.
[0046] Understandably, each drive mechanism includes a rotary motor and a reducer, with the rotary motor connected to the corresponding stirring shaft via the reducer.
[0047] It should be noted that the combination of the rotary motor and the reducer provides a stable and adjustable power output to the stirring shaft, ensuring the efficient and stable operation of the mixer, while adapting to various process requirements and extending the equipment's lifespan.
[0048] Reference Figure 1It is understood that the shearing mechanism 200 also includes a third material conveying pipeline 252, the inlet end of the second three-way valve 242 is connected to the output end of the mixing tank corresponding to the secondary spiral mixing shear 220, the first outlet end of the second three-way valve 242 is connected to the input end of the third material conveying pipeline 252, and the output end of the third material conveying pipeline 252 is connected to the input end of the mixing and batching tank 100.
[0049] It should be noted that the material processed by the second three-way valve 242 and the third material conveying pipeline 252 can be diverted and conveyed to the third-stage spiral mixing and shearing machine 230 through the second three-way valve 242, which optimizes the production process. This design reduces the equipment footprint and the complexity of material transmission by making reasonable use of the conveying pipeline and valve, thereby reducing equipment costs and maintenance difficulty.
[0050] Reference Figure 1 It is understood that the shearing mechanism 200 also includes a fourth material conveying pipeline 253, the inlet end of the third three-way valve 243 is connected to the output end of the mixing tank corresponding to the three-stage spiral mixing shear 230, the first outlet end of the third three-way valve 243 is connected to the input end of the fourth material conveying pipeline 253, and the output end of the fourth material conveying pipeline 253 is connected to the input end of the mixing and batching tank 100.
[0051] It should be noted that the material processed by the three-way valve 243 and the fourth material conveying pipeline 253 can be diverted and conveyed to the mixing and batching tank 100 through the third three-way valve 243, thus optimizing the production process.
[0052] In some embodiments, the mixing and batching tank 100 has a capacity of 500L and is equipped with stirring blades and a drive motor; the first material conveying pipeline 130 has an inner diameter of 50mm and is made of stainless steel; the material control valve 140 is an electric regulating valve with an accuracy of ±0.5%; the material flow meter 150 is an electromagnetic flow meter with a measurement range of 0-1000L / h; the spiral stirring shear machine has a capacity of 200L per stage of the mixing tank and a stirring blade speed of 100-500rpm; the portable particle size analyzer uses the laser diffraction principle and has a measurement range of 0.1-1000μm; the cooling water circulation system has a cooling water tank capacity of 100L and a circulation pump flow rate of 10L / min; and the control mechanism uses a PLC control system that supports remote monitoring and data recording.
[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0054] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.
[0055] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A continuous shearing device for ultra-fine nitroguanidine, characterized by, include: Mixing and batching tank, first material conveying pipeline, material control valve, material flow meter, material discharge pipeline, shearing mechanism and control device; The mixing tank is used for mixing and storing nitroguanidine. The output end of the mixing tank is connected to the input end of the first material conveying pipeline. The material control valve and the material flow meter are both located on the first material conveying pipeline. The material control valve is located near the output end of the mixing tank, and the material flow meter is located between the material control valve and the output end of the first material conveying pipeline. The shearing mechanism includes a primary spiral mixing shearing machine, a secondary spiral mixing shearing machine, a tertiary spiral mixing shearing machine, a first three-way valve, a second three-way valve, and a third three-way valve. Each of the primary, secondary, and tertiary spiral mixing shearing machines includes spiral mixing blades, a mixing shaft, a drive mechanism, and a mixing tank. The spiral mixing blades are fixedly mounted on the mixing shaft, and the drive mechanism is connected to the mixing shaft. Both the mixing shaft and the spiral mixing blades are located in the mixing tank, and the drive mechanism is located at the top of the mixing tank. Each mixing tank is equipped with a portable particle size analyzer. The output end of the first material conveying pipeline is connected to the mixing tank corresponding to the primary spiral mixing shearing machine. The output end of the mixing tank corresponding to the first-stage spiral mixing and shearing machine is connected to the input end of the mixing tank corresponding to the second-stage spiral mixing and shearing machine through the inlet end and the first outlet end of the first three-way valve, and the second outlet end of the first three-way valve is connected to the input end of the material discharge pipeline; the output end of the mixing tank corresponding to the second-stage spiral mixing and shearing machine is connected to the input end of the mixing tank corresponding to the third-stage spiral mixing and shearing machine through the inlet end and the first outlet end of the second three-way valve, and the second outlet end of the second three-way valve is connected to the input end of the material discharge pipeline; the output end of the mixing tank corresponding to the third-stage spiral mixing and shearing machine is connected to the input end of the material discharge pipeline through the inlet end and the first outlet end of the third three-way valve, and the second outlet end of the third three-way valve is connected to the input end of the mixing and batching tank; The control device includes a frequency converter and a control mechanism. The frequency converter is connected to the control mechanism. The control mechanism is also connected to the material control valve, the material flow meter, the first three-way valve, the second three-way valve, and the third three-way valve. The control mechanism is also connected to each of the portable particle size analyzers. The frequency converter is also connected to each of the drive mechanisms.
2. The continuous shearing device for ultra-fine nitroguanidine according to claim 1, characterized by The continuous shearing device for ultrafine nitroguanidine also includes a cooling water circulation system, which includes a cooling water tank, a circulation pump, and a cooling water delivery pipeline. Each of the stirring shafts is a hollow stirring shaft, and a cooling water channel is formed inside the stirring shaft. One end of the cooling water delivery pipeline is connected to the cooling water tank, and the other end of the cooling water delivery pipeline is connected to each of the stirring shafts. The circulation pump is located on the cooling water delivery pipeline and is connected to the control mechanism.
3. The continuous shearing device for ultra-fine nitroguanidine according to claim 2, characterized by The cooling water delivery pipeline includes a circulating water input pipeline and a circulating water output pipeline. The input end of the circulating water input pipeline is connected to the cooling water tank, the output end of the circulating water input pipeline is connected to the input end of each of the stirring shafts, the input end of the circulating water output pipeline is connected to the output end of each of the stirring shafts, and the output end of the circulating water output pipeline is connected to the cooling water tank. The circulating pump is located on the circulating water input pipeline.
4. The continuous shearing apparatus for ultrafine nitroguanidine according to claim 3, characterized in that, The continuous shearing device for ultrafine nitroguanidine further includes a first temperature detector, a second temperature detector, and a third temperature detector. The first temperature detector is located at the output end of the stirring shaft corresponding to the first-stage spiral stirring shearing machine, the second temperature detector is located at the output end of the stirring shaft corresponding to the second-stage spiral stirring shearing machine, and the third temperature detector is located at the output end of the stirring shaft corresponding to the third-stage spiral stirring shearing machine. The control mechanism is also connected to the first temperature detector, the second temperature detector, and the third temperature detector respectively.
5. The continuous shearing device for ultra-fine nitroguanidine according to claim 1, wherein The shearing mechanism further includes a second material conveying pipeline. The inlet end of the first three-way valve is connected to the output end of the mixing tank corresponding to the first-stage spiral mixing shear, the first outlet end of the first three-way valve is connected to the input end of the second material conveying pipeline, and the output end of the second material conveying pipeline is connected to the input end of the mixing tank corresponding to the second-stage spiral mixing shear.
6. The continuous shearing device for ultra-fine nitroguanidine according to claim 1, wherein Each of the drive mechanisms includes a rotary motor and a reducer, wherein the rotary motor is connected to the corresponding stirring shaft via the reducer.
7. The continuous shearing device for ultra-fine nitroguanidine according to claim 1, wherein The shearing mechanism also includes a third material conveying pipeline. The inlet end of the second three-way valve is connected to the output end of the mixing tank corresponding to the secondary spiral mixing shearing machine. The first outlet end of the second three-way valve is connected to the input end of the third material conveying pipeline. The output end of the third material conveying pipeline is connected to the input end of the mixing and batching tank.
8. The continuous shearing device for ultra-fine nitroguanidine according to claim 1, wherein The shearing mechanism also includes a fourth material conveying pipeline. The inlet end of the third three-way valve is connected to the output end of the mixing tank corresponding to the three-stage spiral mixing shearing machine. The first outlet end of the third three-way valve is connected to the input end of the fourth material conveying pipeline. The output end of the fourth material conveying pipeline is connected to the input end of the mixing and batching tank.