Bismuth salicylate powder production system and bismuth salicylate powder production process

Abstract

The invention discloses a bismuth salicylate powder production system and a bismuth salicylate powder production process. The system comprises a configuration module, a spin-drying module, a drying module, a dry material crushing module, an airflow mixing module and a packaging module which are connected in sequence, the preparation module is used for preparing bismuth salicylate slurry; the spin-drying module is used for spin-drying the bismuth salicylate slurry prepared by the preparation module; the drying module is used for drying the bismuth salicylate wet material spin-dried by the spin-drying module; the dry material crushing module is used for crushing the bismuth salicylate dry material dried by the drying module to form powder with preset granularity; the airflow mixing module is used for carrying out airflow mixing on powder with preset granularity; and the packaging module is used for packaging the powder mixed by the airflow mixing module. According to the system, caking of the bismuth salicylate powder can be reduced, the uniformity of the bismuth salicylate powder is improved, then the finished product quality of the bismuth salicylate powder is improved, and the using effect of the bismuth salicylate powder is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of synthetic bismuth raw material medicines, in particular to a bismuth salicylate powder production system and a bismuth salicylate powder production process. Background Art

[0002] During the production process of bismuth salicylate powder, the bismuth salicylate powder is prone to agglomeration, which affects the quality of the bismuth salicylate powder, and the uneven particle size also affects the use effect. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a bismuth salicylate powder production system that can reduce agglomeration of the bismuth salicylate powder, improve the uniformity of the bismuth salicylate powder, and thereby improve the quality of the finished bismuth salicylate powder and the effectiveness of the bismuth salicylate powder.

[0004] The invention also provides a production process for bismuth salicylate powder.

[0005] The first aspect of the present invention provides a bismuth salicylate powder production system, which includes a configuration module, a drying module, a drying module, a dry material crushing module, an airflow mixing module and a packaging module connected in sequence; the configuration module is used to configure bismuth salicylate slurry; the drying module is used to dry the bismuth salicylate slurry configured by the configuration module; the drying module is used to dry the bismuth salicylate wet material dried by the drying module; the dry material crushing module is used to crush the bismuth salicylate dry material dried by the drying module to form a powder of a preset particle size; the airflow mixing module is used to perform airflow mixing on the powder of the preset particle size; and the packaging module is used to package the powder mixed by the airflow mixing module.

[0006] In some embodiments, the airflow mixing module includes an airflow supply device and an airflow mixer; the airflow mixer has a mixing chamber, which is respectively connected to the discharge port of the dry material crushing module and the airflow supply port of the airflow supply device; the discharge port of the dry material crushing module is used to supply powder of a preset particle size to the mixing chamber; the airflow supply device is used to introduce airflow into the mixing chamber to mix the powder.

[0007] In some embodiments, the airflow supplied by the airflow supply device is compressed air or compressed nitrogen.

[0008] In some embodiments, the exhaust port of the air flow mixer is provided with a filtering device, and the filtering device is used to filter the exhaust gas passing through the exhaust port.

[0009] In some embodiments, the configuration module includes a hot water supply module, a synthesis reactor and a reactor stirring paddle built into the synthesis reactor; the hot water supply module is connected to the synthesis reactor to supply hot water of a preset temperature to the synthesis reactor; the synthesis reactor is used to synthesize bismuth salicylate slurry; the synthesis stirring paddle is used to stir the bismuth salicylate slurry in the synthesis reactor.

[0010] In some embodiments, the drying module includes a centrifuge, a material receiving bin, a wet material crushing device and a first vacuum loader; the configuration module is connected to the centrifuge of the drying module to supply bismuth salicylate slurry to the centrifuge; the centrifuge is used to dry the bismuth salicylate slurry into block wet material; the material receiving bin is connected to the discharge port at the bottom of the centrifuge; a discharge port is provided at the bottom of the material receiving bin, and the wet material crushing device is provided at the discharge port and is used to break up the block wet material into granular wet material; the wet material crushing device is connected to the drying module through the first vacuum loader, and the first vacuum loader is used to transport the granular wet material to the drying module.

[0011] In some embodiments, the centrifuge further has a pure water inlet, a washing water outlet, a flow valve connected to the pure water inlet, and a conductivity testing device connected to the washing water outlet; the pure water inlet is used to introduce pure water so that the centrifuge washes the bismuth salicylate slurry through pure water; the flow valve is used to control the supply flow entering the pure water inlet; the washing water outlet is used to discharge the washing water; the conductivity testing device is used to detect the actual conductivity of the washing water; wherein the conductivity testing device signal is connected to and controls the flow valve and is configured to control the flow valve to close the pure water supply to stop washing when the actual conductivity is less than the preset conductivity.

[0012] In some embodiments, the drying module includes a single-cone vacuum dryer, a heating jacket and a drying stirring paddle; the heating jacket is arranged between the outer shell and the inner wall of the single-cone vacuum dryer and is used to heat the closed cavity formed by the inner wall of the single-cone vacuum dryer to a preset drying temperature; the drying stirring paddle is arranged in the closed cavity; the closed cavity of the single-cone vacuum dryer is connected to the drying module and is used to heat the bismuth salicylate wet material at a preset drying temperature to dry it into bismuth salicylate dry material; the drying stirring paddle is used to stir the bismuth salicylate wet material in the single-cone vacuum dryer.

[0013] In some embodiments, the dry material crushing module includes a hammer mill, which is arranged below the discharge port of the single-cone vacuum dryer and is used to crush the bismuth salicylate dry material dried by the single-cone vacuum dryer to form a powder of a preset particle size.

[0014] The second embodiment of the present invention provides a bismuth salicylate powder production process, which is applied to the bismuth salicylate powder production system of the first embodiment of the present invention, and comprises the following steps:

[0015] S1: preparing bismuth salicylate slurry through a configuration module;

[0016] S2: drying the bismuth salicylate slurry through a drying module;

[0017] S3: Drying the wet material after spinning through the drying module;

[0018] S4: The dried dry material is broken up into powder of a preset particle size through the dry material crushing module;

[0019] S5: performing air flow mixing on the powder of preset particle size through the air flow mixing module;

[0020] S6: The mixed powder is packaged through the packaging module.

[0021] It can be seen from the technical solution that the embodiments provided by the present invention have the following advantages:

[0022] (1) The bismuth salicylate powder production system can sequentially prepare bismuth salicylate slurry, spin dry bismuth salicylate slurry, dry bismuth salicylate wet material, crush bismuth salicylate dry material, mix bismuth salicylate powder, and package the mixed bismuth salicylate powder. Therefore, this system can achieve fully enclosed continuous production, reduce manual intervention, improve the degree of production automation and processing efficiency, and make operation more flexible and convenient;

[0023] (2) By setting up an airflow mixing module, bismuth salicylate powder can be mixed with airflow. The shear force generated by the high-speed airflow and the high-frequency collision between particles can effectively break the soft agglomerates of the material and disperse it into original particles or smaller agglomerate units. The airflow mixing redistributes particles of different sizes through the combined action of dynamic dispersion-mixing-grading, forming a more reasonable particle size distribution (such as the gaps between coarse particles are filled with fine powder), thereby reducing the bulk density and improving the fluidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 2 is a schematic structural diagram of a bismuth salicylate powder production system according to an embodiment of the present invention;

[0026] Figure 2 4 is a flow chart of a process for producing bismuth salicylate powder according to an embodiment of the present invention.

[0027] Reference numerals:

[0028] Bismuth salicylate powder production system 100;

[0029] Configuration module 1, hot water supply module 11, heating kettle 111, heating stirring paddle 112, synthesis reactor 12, reactor stirring paddle 13, reactor stirring paddle drive motor 14, diaphragm pump 15;

[0030] Drying module 2, centrifuge 21, material receiving bin 22, wet material crushing device 23, first vacuum loader 24;

[0031] Drying module 3, single cone vacuum dryer 31;

[0032] Dry material crushing module 4, hammer mill 41;

[0033] Airflow mixing module 5, airflow mixer 51;

[0034] Packing module 6, buffer silo 61, automatic packing machine 62, weighing platform 63;

[0035] Steel frame support structure 7;

[0036] Second vacuum loader 8. DETAILED DESCRIPTION

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] Reference below Figure 1-Figure 2 A bismuth salicylate powder production system 100 and a bismuth salicylate powder production process according to an embodiment of the present invention are described.

[0041] Example 1

[0042] like Figure 1 As shown, an embodiment of the first aspect of the present invention provides a bismuth salicylate powder production system 100, which includes a configuration module 1, a drying module 2, a drying module 3, a dry material crushing module 4, an air flow mixing module 5 and a packaging module 6 connected in sequence.

[0043] Configuration module 1 is capable of configuring bismuth salicylate slurry. Drying module 2 is capable of drying the bismuth salicylate slurry configured by configuration module 1 to obtain a wet bismuth salicylate material. Drying module 3 is capable of drying the wet bismuth salicylate material dried by drying module 2. Dry material crushing module 4 is capable of crushing the dry bismuth salicylate material dried by drying module 3 to form a powder of a predetermined particle size. Airflow mixing module 5 is capable of mixing the powders of the predetermined particle size. Packaging module 6 is capable of packaging the powder mixed by airflow mixing module 5.

[0044] The configuration module 1, the drying module 2, the drying module 3, the dry material crushing module 4, the air flow mixing module 5 and the packaging module 6 form a material conveying path.

[0045] It should also be noted that the air flow mixing module 5 here is used to mix a single bismuth salicylate powder.

[0046] In related art, bismuth salicylate powder is only screened during production. However, screening only grades the bismuth salicylate powder. In the present application, by providing an airflow mixing module 5, airflow mixing of the bismuth salicylate powder can be achieved, redistributing particles of different sizes to form a more reasonable particle size distribution, thereby reducing bulk density and improving fluidity.

[0047] In some specific examples, the preset particle size is 5 μm to 8 μm.

[0048] It can be seen from the technical solution that the embodiments provided by the present invention have the following advantages:

[0049] (1) The bismuth salicylate powder production system 100 can sequentially prepare bismuth salicylate slurry, spin-dry the bismuth salicylate slurry, dry the wet bismuth salicylate material, crush the dry bismuth salicylate material, mix the bismuth salicylate powder, and package the mixed bismuth salicylate powder. As a result, the system can achieve fully enclosed continuous production, reduce manual intervention, improve the degree of automation and processing efficiency of production, and make operation more flexible and convenient;

[0050] (2) By setting up the airflow mixing module 5, the bismuth salicylate powder can be mixed with airflow. The shear force generated by the high-speed airflow and the high-frequency collision between particles can effectively break the soft agglomerates of the material and disperse it into original particles or smaller agglomerate units. The airflow mixing redistributes particles of different sizes through the combined action of dynamic dispersion-mixing-grading, forming a more reasonable particle size distribution (such as the gaps between coarse particles are filled with fine powder), thereby reducing the bulk density and improving the fluidity.

[0051] In some specific examples, the bismuth salicylate powder production system 100 further includes a steel frame support structure 7 for support.

[0052] Example 2

[0053] like Figure 1 As shown, the airflow mixing module 5 further includes an airflow supply device and an airflow mixer 51. The airflow mixer 51 has a mixing chamber, which is connected to the discharge port of the dry material pulverization module 4 and is also connected to the airflow supply port of the airflow supply device. The discharge port of the dry material pulverization module 4 can supply powder of a preset particle size to the mixing chamber, and the airflow supply device can introduce airflow into the mixing chamber to mix the powder.

[0054] Furthermore, the airflow supplied by the airflow supply device is compressed air or compressed nitrogen.

[0055] For example, compressed air and compressed nitrogen are used as dry airflows, which can simultaneously dynamically dry the material, reduce the moisture content, and inhibit the agglomeration tendency of the bismuth salicylate powder. The moisture content of the compressed air and compressed nitrogen is set and adjusted by those skilled in the art based on actual production conditions and is not limited here.

[0056] For example, an inert gas (such as argon) may be introduced into the mixing chamber to replace the air, thereby reducing the risk of flammability and explosion, improving safety, and reducing the risk of explosion caused by static electricity generated by friction between powders during mixing.

[0057] Furthermore, the exhaust port of the airflow mixer 51 is equipped with a filter device that can filter the exhaust gas passing through the exhaust port. Specifically, the exhaust gas here is a mixture of compressed air and a portion of the powder. By providing the filter device, the dust concentration in the exhaust gas can be controlled within environmental protection standards (e.g., less than 10mg / m³), reducing dust emission caused by vibration during the mixing process and improving the workshop environment.

[0058] Example 3

[0059] like Figure 1 As shown, the configuration module 1 further includes a hot water supply module 11, a synthesis reactor 12, and a reactor stirring paddle 13 built into the synthesis reactor 12. The hot water supply module 11 is connected to the synthesis reactor 12 and can supply hot water at a preset temperature to the synthesis reactor 12. The synthesis reactor 12 is capable of synthesizing a bismuth salicylate slurry. The synthesis stirring paddle can stir the bismuth salicylate slurry within the synthesis reactor 12. By providing the hot water supply module 11 and the synthesis stirring paddle, the reaction rate of the bismuth salicylate slurry can be increased, thereby improving the production efficiency of bismuth salicylate powder.

[0060] In a specific example, the hot water supply module 11 can supply hot water at a preset temperature to the synthesis reactor 12. Bismuth hydroxide is then added to the synthesis reactor 12 while stirring using a synthesis stirring paddle. Salicylic acid is then added to the synthesis reactor 12 while stirring continuously using the synthesis stirring paddle. After the addition of the ingredients is complete, the stirring reaction continues for a period of time while the reaction temperature in the synthesis reactor 12 is controlled.

[0061] Specifically, the configuration module 1 further includes a reactor stirring paddle driving motor 14 , and the reactor stirring paddle 13 is driven by the reactor stirring paddle driving motor 14 .

[0062] The hot water supply module 11 includes a heating kettle 111, a heating and stirring paddle 112, and a steam heating component. The steam heating component is used to heat the heating kettle 111, and the heating and stirring paddle 112 is built into the heating kettle 111 to stir and increase heating efficiency.

[0063] The configuration module 1 also includes a plurality of diaphragm pumps 15, at least one diaphragm pump 15 is connected between the heating kettle 111 and the synthesis reactor 12 to transport pure water at a preset temperature in the heating kettle 111 to the synthesis reactor 12; at least one diaphragm pump 15 is arranged at the outlet of the synthesis reactor 12 to transport the bismuth salicylate slurry to the outside of the synthesis reactor 12, for example: at least one diaphragm pump 15 is arranged between the outlet of the synthesis reactor 12 and the centrifuge 1 to transport the bismuth salicylate slurry to the centrifuge 1.

[0064] Example 4

[0065] like Figure 1 As shown, the drying module 2 further includes a centrifuge 21, a receiving bin 22, a wet material pulverizing device 23, and a first vacuum loader 24. The configuration module 1 is connected to the centrifuge 21 of the drying module 2, and the bismuth salicylate slurry configured in the configuration module 1 can be supplied to the centrifuge 21. The centrifuge 21 is capable of drying the bismuth salicylate slurry into a bulk wet material; the receiving bin 22 is connected to the discharge port at the bottom of the centrifuge 21; the receiving bin 22 has a discharge port at the bottom, and the wet material pulverizing device 23 is located at the discharge port and is capable of breaking up the bulk wet material into granular wet material; the wet material pulverizing device 23 is connected to the drying module 3 via the first vacuum loader 24, and the first vacuum loader 24 is capable of conveying the granular wet material to the drying module 3.

[0066] A receiving bin 22 is located below the discharge port at the bottom of the centrifuge 21. A pulverizing device is installed below the discharge port of the receiving bin 22. After drying in the centrifuge 21, the bulk material falls by gravity into the receiving bin 22 and then into the pulverizing device from the discharge port of the receiving bin 22, eliminating the need for additional conveying and drive mechanisms. Furthermore, after centrifugal discharge, the material falls directly into the receiving bin 22 without manual handling or transfer, preventing it from being exposed to air and absorbing moisture. The receiving bin 22 also serves as a temporary buffer, balancing the cadence of centrifugal discharge and the wet material pulverization device 23, ensuring continuous feeding of the pulverization process.

[0067] The wet material pulverizer 23 breaks up the lumpy wet material obtained after centrifuge 21 drying to produce granular wet material. The granular wet material is then conveyed to the drying module 3 for drying by a first vacuum loader 24. During this process, compared to lumpy wet material, granular wet material has a greater surface area per unit mass, which helps improve heat conduction and water evaporation rates. Furthermore, the granular wet material obtained after breaking up has greater fluidity, reducing the likelihood of it getting stuck in the conveying path. This helps improve the stability of continuous feeding and, in turn, enhances the production efficiency of bismuth salicylate.

[0068] Furthermore, the centrifuge 21 also has a pure water inlet, a washing water outlet, a flow valve connected to the pure water inlet, and a conductivity testing device connected to the washing water outlet; the pure water inlet can be fed with pure water so that the centrifuge 21 can centrifugally wash the bismuth salicylate slurry through pure water; the flow valve can control the supply flow entering the pure water inlet; the washing water outlet can discharge the washing water; the conductivity testing device can detect the actual conductivity of the washing water; wherein the conductivity testing device signal is connected to and controls the flow valve and is configured to control the flow valve to close the pure water supply to stop washing when the actual conductivity is less than the preset conductivity.

[0069] In combination with the above embodiment, the centrifuge 21 can wash and dry the bismuth salicylate slurry.

[0070] In one specific example, a flow valve regulates the pure water supply flow. External pure water is used to clean the bismuth salicylate slurry during the centrifugation process to form wash water, which is then discharged from the wash water outlet of centrifuge 21 to remove waste liquid containing impurities. A conductivity tester is provided at the wash water outlet to measure the conductivity of the wash water.

[0071] During the initial washing phase, the wastewater contains a large amount of dissolved salts and ionic impurities, resulting in a high conductivity. As the number of washes increases, the impurities gradually decrease, and the conductivity decreases accordingly. When the actual conductivity is less than the preset value (i.e., less than 100 μs / cm), it indicates that the impurities have been fully washed away. The conductivity tester controls the flow valve to adjust the flow rate and stop the water supply. The washing endpoint is defined as the point where the actual conductivity falls below the preset value (100 μs / cm). After centrifuge 21 reaches the washing endpoint, it spin-dries the bismuth salicylate slurry. The drying endpoint is defined as the absence of water flowing out of the wash water outlet of centrifuge 21. After the drying endpoint, a wet block is obtained.

[0072] Furthermore, during the washing process, purified water at 60-65°C is passed through centrifuge 21 to wash the material. After each wash with 500-600L of purified water, the material is dried and washed until the conductivity of the washing water is less than 100μs / cm. This washing process is repeated at least five times. If the actual conductivity of the washing water is still higher than the preset conductivity (100μs / cm) after five washes, the number of washes is increased accordingly until the required conductivity is met. Finally, 500L of room-temperature purified water is used to cool the material. After drying, the material is discharged into a receiving bin 22 below centrifuge 21. Below this bin 22 is a wet material crushing device 23 to break up the bulk material discharged from the centrifuge.

[0073] Example 5

[0074] like Figure 1As shown, the drying module 3 further includes a single-cone vacuum dryer 31, a heating jacket, and a drying and stirring paddle; the heating jacket is arranged between the outer shell and the inner wall of the single-cone vacuum dryer 31, and the heating jacket is used to heat the closed cavity formed by the inner wall of the single-cone vacuum dryer 31 to a preset drying temperature, that is, the heating jacket heats the closed cavity enclosed by the inner wall to reach the preset drying temperature. The drying and stirring paddle is arranged in the closed cavity; the closed cavity of the single-cone vacuum dryer 31 is connected to the drying module 2 and is used to heat the bismuth salicylate wet material at a preset drying temperature to dry it into bismuth salicylate dry material; the drying and stirring paddle is used to stir the bismuth salicylate wet material in the single-cone vacuum dryer 31. In other words, the drying module 3 includes a single-cone vacuum dryer 31, a heating jacket, and a drying and stirring paddle. Among them, the heating jacket is arranged between the outer shell and the inner wall of the single-cone vacuum dryer 31, and the closed cavity enclosed by the inner wall reaches a preset drying temperature by heating. The drying stirring paddle is located in the closed cavity, and the closed cavity is connected to the drying module 2 to receive the bismuth salicylate wet material after drying. The bismuth salicylate wet material is heated and dried at a preset drying temperature (such as 60~70℃) and in a vacuum environment to form bismuth salicylate dry material; the drying stirring paddle stirs the bismuth salicylate wet material to reduce agglomeration and accelerate drying efficiency.

[0075] It should be further explained that the heating principle of the heating jacket is to set a closed interlayer (i.e., the jacket) between the outer shell and the inner wall of the single-cone vacuum dryer 31, and pass a heating medium into the jacket, and use the principle of heat conduction to transfer heat to the material inside the equipment, thereby achieving heating or temperature control of the material.

[0076] Furthermore, the dry material crushing module 4 includes a hammer crusher 41, which is arranged under the discharge port of the single-cone vacuum dryer 31. The hammer crusher 41 can crush the bismuth salicylate dry material dried by the single-cone vacuum dryer 31 to form a powder of a preset particle size.

[0077] The dried material is discharged through the discharge port of the single-cone vacuum dryer 31 to the hammer mill 41 connected below and broken up into a preset particle size. The crushed bismuth salicylate powder can be transported to the air flow mixer 51 through a vacuum conveying system for mixing and homogenization, thereby improving the uniformity of the crushed material powder particles and reducing the reduction in use effect caused by uneven particle size. The homogenized material powder is transported to the packaging device through the vacuum conveying system for packaging to complete the production of bismuth salicylate powder.

[0078] It should be further explained that the vacuum conveying system includes a second vacuum loader 8 and several conveying pipes. At least one conveying pipe is connected between the discharge port of the hammer mill 41 and the powder inlet of the single-cone vacuum dryer 31; at least one conveying pipe is connected between the powder outlet of the single-cone vacuum dryer 31 and the packaging device. Thus, the hammer mill 41, the single-cone vacuum dryer 31, and the packaging device form a conveying path for the material powder through the conveying pipes. The second vacuum loader 8 can drive the material powder along this conveying path to the packaging device.

[0079] The packaging device 6 includes a buffer silo 61, an automatic baler 62, and a weighing station 63. The buffer silo 61 is connected to the hammer crusher's discharge port via a conveying pipe. The automatic baler 66 automatically transfers the granular dry material temporarily stored in the buffer silo 61 into packaging containers (automatically bagging and packaging). The weighing station 63 re-checks the weight of the packaged granular dry material to prevent underweight or overweight. The buffer silo 61 temporarily stores the granular dry material to address the speed mismatch between upstream and downstream, specifically the inconsistency between the hammer crusher's discharge speed and the baling speed of the automatic baler 66, allowing them to operate asynchronously.

[0080] It should be further emphasized that the bismuth salicylate powder production system 100 of this embodiment can use a control system operation station to automatically control production, which has a higher degree of automation, higher processing efficiency, and more flexible and convenient operation.

[0081] The equipment used in the related art is complex, the operation is difficult, the manual labor intensity is high, the operator has a long contact time with the material, and improper treatment of emissions can easily cause secondary pollution; the bismuth salicylate powder production system 100 of the present application can be connected to the configuration module 1, the drying module 2, the drying module 3, the dry material crushing module 4, the airflow mixing module 5 and the packaging module 6 through a pipeline and a delivery pump to realize the integrated design and automated production of the bismuth salicylate powder production system 100, which greatly improves the processing efficiency, greatly improves the safety, and is simple to maintain in the later stage. At the same time, it reduces pollution sources, reduces pollution to the environment, reduces manual operation, improves the rational use of equipment, reduces material waste, and reduces production costs and manual labor intensity. The structural design of the system is more reasonable and has higher production efficiency.

[0082] Example 6

[0083] like Figure 2 As shown, the second embodiment of the present invention provides a bismuth salicylate powder production process, which includes the following steps:

[0084] S1: preparing bismuth salicylate slurry through configuration module 1;

[0085] S2: drying the bismuth salicylate slurry through the drying module 2;

[0086] S3: Drying the wet material after spinning through the drying module 3;

[0087] S4: The dried dry material is broken up into powder of a preset particle size by the dry material crushing module 4;

[0088] S5: mixing the powder of the preset particle size through the air flow mixing module 5;

[0089] S6: The mixed powder is packaged by the packaging module 6.

[0090] In some specific embodiments, step S1 includes the following sub-steps:

[0091] S11: The hot water supply module 11 adds pure water of a preset temperature to the synthesis reactor 12, and then adds bismuth hydroxide to the pure water of the preset temperature, and the synthesis stirring blade stirs at a first speed to obtain a first mixed slurry;

[0092] S12: Adding salicylic acid to the first mixed slurry to obtain a second mixed solution. Specifically, salicylic acid is added to the first mixed slurry multiple times at preset time intervals. After each addition of salicylic acid, the stirring speed is gradually increased from the current speed until a preset upper limit speed is reached.

[0093] S13: After the last addition of salicylic acid, the synthesis stirring paddle is stirred at a preset upper limit speed, and the reaction temperature is maintained at a preset reaction temperature for a preset reaction time to complete the reaction.

[0094] Specifically,

[0095] In step S11, purified water at a preset temperature (70-80°C) is supplied to the synthesis reactor 12. The reactor stirring paddle 13 is driven by an electric motor to stir the reactor at a first speed (30-40 rpm / min). Then, 210-220 kg of bismuth hydroxide solid is added. After the addition, the reactor stirring paddle 13 stirs at the first speed for 10-20 minutes.

[0096] In step S12, a total of 100-125 kg of salicylic acid solid is added, and the total feeding time is 4-5 hours. After each addition of salicylic acid, the stirring speed is gradually increased from the current speed to a preset speed increase, where the preset speed increase may be 10 rpm / min, and the preset time interval is 1 hour. Specifically, salicylic acid is added to the first mixed solution to obtain a second mixed solution. As salicylic acid is gradually added, the second mixed solution becomes increasingly viscous, and the feeding stirring rate and feeding amount are as follows: the amount of salicylic acid added in the first hour is 30-35 kg, and the stirring speed is 30-40 rpm / min; the amount of salicylic acid added in the second hour is 25-30 kg, and the stirring speed is 40-50 rpm / min; the amount of salicylic acid added in the third hour is 20-25 kg, and the stirring speed is 50-60 pm / min; the amount of salicylic acid added in the fourth hour is 15-20 kg, and the stirring speed is 60-70 rpm / min; the amount of salicylic acid added in the fifth hour is 10-15 kg, and the stirring speed reaches the preset upper limit speed, which is 70-75 rpm / min.

[0097] In step S13, the synthesis stirring paddle is stirred at a preset upper limit speed of 70-75 rpm / min, and the reaction is kept at a preset reaction temperature for a preset reaction time, wherein the preset reaction temperature is 70-75° C. and the preset reaction time is 2.5-3.5 h.

[0098] In some specific embodiments, step S2 includes the following sub-steps:

[0099] S21: adding pure water for washing through the pure water inlet and flow valve;

[0100] S22: detecting the actual conductivity of the washing water by a conductivity testing device at the washing water outlet, and comparing the actual conductivity of the washing water with a preset conductivity;

[0101] S23: If the actual conductivity is less than the preset conductivity, the flow valve is controlled to adjust the wash water flow to 0 and the washing is terminated, and then step S24 is performed; if it is greater than the preset conductivity, S21-S22 are repeated;

[0102] S24: drying the bismuth salicylate slurry.

[0103] The other components and operations of the bismuth salicylate powder production system 100 according to an embodiment of the present invention are well known to those skilled in the art and will not be described in detail here. In the description of the present invention, "first feature" and "second feature" may include one or more of these features. The vertical direction, left-right direction, and front-back direction are based on the vertical direction, left-right direction, and front-back direction shown in the figure.

[0104] In the description of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature therebetween. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature.

[0105] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses 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 any one or more embodiments or examples.

[0106] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A bismuth salicylate powder production system, characterized in that: It comprises a configuration module (1), a drying module (2), a drying module (3), a dry material crushing module (4), an air flow mixing module (5) and a packaging module (6) which are connected in sequence; The configuration module (1) is used to configure bismuth salicylate slurry; The drying module (2) is used to dry the bismuth salicylate slurry configured by the configuration module (1); The drying module (3) is used to dry the wet bismuth salicylate material dried by the drying module (2); The dry material crushing module (4) is used to crush the bismuth salicylate dry material dried by the drying module (3) to form a powder with a preset particle size; The airflow mixing module (5) is used to mix powders of a preset particle size through airflow; The packaging module (6) is used to package the powder mixed by the airflow mixing module (5).

2. The bismuth salicylate powder production system according to claim 1, characterized in that: The airflow mixing module (5) comprises an airflow supply device and an airflow mixer (51); The airflow mixer (51) has a mixing chamber, and the mixing chamber is respectively connected to the discharge port of the dry material crushing module (4) and the airflow supply port of the airflow supply device; The discharge port of the dry material crushing module (4) is used to supply powder of a preset particle size to the mixing chamber; The air flow supply device is used to introduce air flow into the mixing chamber to mix powder.

3. The bismuth salicylate powder production system according to claim 2, characterized in that: The airflow supplied by the airflow supply device is compressed air or compressed nitrogen.

4. The bismuth salicylate powder production system according to claim 2, characterized in that: The exhaust port of the air flow mixer (51) is provided with a filtering device, and the filtering device is used to filter the exhaust gas passing through the exhaust port.

5. The bismuth salicylate powder production system according to claim 1, characterized in that: The configuration module (1) includes a hot water supply module (11), a synthesis reactor (12), and a reactor stirring paddle (13) built into the synthesis reactor (12); The hot water supply module (11) is connected to the synthesis reactor (12) to supply hot water of a preset temperature to the synthesis reactor (12); The synthesis reactor (12) is used for synthesizing bismuth salicylate slurry; The synthesis stirring paddle is used to stir the bismuth salicylate slurry in the synthesis reactor (12).

6. The bismuth salicylate powder production system according to claim 1, characterized in that: The drying module (2) includes a centrifuge (21), a material receiving bin (22), a wet material crushing device (23) and a first vacuum loader (24); The configuration module (1) is connected to the centrifuge (21) of the drying module (2) to supply bismuth salicylate slurry to the centrifuge (21); The centrifuge (21) is used to spin dry the bismuth salicylate slurry into a block-shaped wet material; The receiving bin (22) is connected to the discharge port at the bottom of the centrifuge (21); The bottom of the receiving bin (22) is provided with a discharge port, and the wet material crushing device (23) is provided at the discharge port and is used to break up the block wet material into granular wet material; The wet material pulverizing device (23) is connected to the drying module (3) via the first vacuum loader (24), and the first vacuum loader (24) is used to transport the granular wet material to the drying module (3).

7. The bismuth salicylate powder production system according to claim 6, characterized in that: The centrifuge (21) also has a pure water inlet, a washing water outlet, a flow valve connected to the pure water inlet, and a conductivity testing device connected to the washing water outlet; The pure water inlet is used to introduce pure water so that the centrifuge (21) can centrifuge and wash the bismuth salicylate slurry through pure water; The flow valve is used to control the supply flow into the pure water inlet; The washing water outlet is used to discharge washing water; The conductivity testing device is used to detect the actual conductivity of the washing water; The conductivity testing device is connected to and controls the flow valve via a signal and is configured to control the flow valve to close the pure water supply to stop washing when the actual conductivity is less than a preset conductivity.

8. The bismuth salicylate powder production system according to claim 1, characterized in that: The drying module (3) comprises a single-cone vacuum dryer (31), a heating jacket and a drying stirring paddle; The heating jacket is arranged between the outer shell and the inner wall of the single-cone vacuum dryer (31) and is used to heat the closed cavity formed by the inner wall of the single-cone vacuum dryer (31) to a preset drying temperature; The drying and stirring paddle is arranged in the closed cavity; The sealed cavity of the single-cone vacuum dryer (31) is connected to the drying module (2) and is used to heat the bismuth salicylate wet material at a preset drying temperature to dry it into bismuth salicylate dry material; The drying stirring paddle is used to stir the bismuth salicylate wet material in the single cone vacuum dryer (31).

9. The bismuth salicylate powder production system according to claim 8, characterized in that: The dry material pulverizing module (4) comprises a hammer mill (41), which is arranged below the discharge port of the single-cone vacuum dryer (31) and is used to pulverize the bismuth salicylate dry material dried by the single-cone vacuum dryer (31) to form a powder with a preset particle size.

10. A process for producing bismuth salicylate powder, characterized in that: The following steps are involved: S1: preparing bismuth salicylate slurry through the configuration module (1); S2: drying the bismuth salicylate slurry through the drying module (2); S3: drying the wet material after being spun off through the drying module (3); S4: breaking up the dried dry material into powder of a preset particle size through the dry material crushing module (4); S5: performing airflow mixing on the powder of the preset particle size through the airflow mixing module (5); S6: The mixed powder is packaged by the packaging module (6).

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