CN117065375B - Method for preparing ASA powder based on spray drying method - Google Patents

Method for preparing ASA powder based on spray drying method Download PDF

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Publication number
CN117065375B
CN117065375B CN202311336626.5A CN202311336626A CN117065375B CN 117065375 B CN117065375 B CN 117065375B CN 202311336626 A CN202311336626 A CN 202311336626A CN 117065375 B CN117065375 B CN 117065375B
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asa
drying
illumination intensity
inlet
atomizing
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CN117065375A (en
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刘翰卿
马超
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Shandong Yuanbang New Material Co ltd
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Shandong Yuanbang New Material Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/16—Evaporating by spraying
    • B01D1/18—Evaporating by spraying to obtain dry solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/0082—Regulation; Control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

The application belongs to the field of material preparation research, and discloses a method for preparing ASA powder based on a spray drying method, wherein a flocculating agent is not required in the process of preparing ASA powder, so that on one hand, the material cost can be reduced; on the other hand, without a washing process, the generation of waste water can be avoided. In addition, the method can control the granularity of the ASA powder more accurately, and is more suitable for preparing ASA powder with small granularity. The technical field of the method of the invention comprises drying to eliminate liquid from solid materials or articles; measurement of the intensity, speed, spectral composition, polarization, phase or pulse characteristics of infrared light, visible light, ultraviolet light, and the like.

Description

Method for preparing ASA powder based on spray drying method
Technical Field
The application belongs to the field of material preparation research, and particularly relates to a method for preparing ASA powder based on a spray drying method.
Background
ASA (English name: acrylonitrile Styrene acrylate copolymer), engineering plastics, is a graft copolymer of acrylic rubber body and acrylonitrile and styrene. ASA and ABS are structurally similar, which retains the excellent mechanical and physical properties of ABS as an engineering plastic.
However, ASA itself has poor coloring ability, and uneven surface color, and even pearlescent five-color phenomena often occur in the application process of ASA materials. In general, this problem can be achieved by selecting ASA powder of smaller particle size and concentrated particle size distribution to prepare the product.
In view of the above problems, the present application provides a method for preparing ASA powder based on a spray drying method to prepare ASA powder having a small particle size and a concentrated particle size distribution.
Disclosure of Invention
In order to solve the defects of the prior art, the application provides a method for preparing ASA powder based on a spray drying method, and flocculant is not required to be used in the process of preparing ASA powder, so that on one hand, the material cost can be reduced; on the other hand, without a washing process, the generation of waste water can be avoided. In addition, the method can control the granularity of the ASA powder more accurately, and is more suitable for preparing ASA powder with small granularity. The technical field of the method of the invention comprises drying to eliminate liquid from solid materials or articles; measurement of the intensity, speed, spectral composition, polarization, phase or pulse characteristics of infrared light, visible light, ultraviolet light, and the like.
The technical effect to be achieved by the application is realized through the following scheme:
in a first aspect, the present invention provides a method for preparing ASA powder based on a spray drying process, the method being based on an ASA drying system; the system comprises: the device comprises a feeding part, an atomizing part, a gating control part, a recycling part, a drying part and control equipment; the outlet of the feeding part is connected with the inlet of the atomizing part, and the outlet of the atomizing part is connected with the inlet of one of the recovery part and the drying part through the gating control part; the control equipment is electrically connected with the feeding part, the atomizing part, the gating control part and the drying part respectively;
wherein, the inlet of the atomizing part is provided with a spraying device; a plurality of optical detection assembly has set gradually along ASA fog flow direction on the inner wall of atomizing portion, optical detection assembly includes: the device comprises a light emitter, a first illumination intensity sensor and a second illumination intensity sensor, wherein the first illumination intensity sensor and the light emitter are arranged opposite to each other in the direction perpendicular to the flowing direction, and the second illumination intensity sensor is arranged between the first illumination intensity sensor and the light emitter on the inner wall of the atomization part; a fan is arranged in the drying part;
the method comprises the following steps:
controlling the outlet of the atomization part to be communicated with the inlet of the recovery part;
controlling the feed section to flow ASA emulsion from an inlet of the feed section to the spraying device;
controlling the spraying device to spray ASA emulsion into a cavity in the atomization part at a preset initial speed so as to atomize the ASA emulsion into ASA mist;
if the illumination intensity detected by each optical detection assembly is larger than a first illumination intensity threshold value, and the difference between the optical intensities detected by the specified number of optical detection assemblies closest to the outlet of the atomizing part does not exceed a second illumination intensity threshold value; controlling the gating control part to communicate the outlet of the atomizing part with the inlet of the drying part so that ASA mist flows to the drying part; wherein the first illumination intensity threshold is positively correlated with the speed at which ASA emulsion flows from the inlet of the feed section to the spraying device;
and controlling the fan to blow a drying medium into the drying part so as to obtain ASA powder at the outlet of the drying part.
In an alternative embodiment of the invention, the method further comprises:
and if the illumination intensity detected by the at least one optical detection assembly is not greater than the first illumination intensity threshold value, controlling the spraying device to reduce the particle size of the liquid drops in the ASA mist.
In an alternative embodiment of the invention, the method further comprises:
if the difference between the optical intensities detected by a designated number of optical detection assemblies adjacent to the atomizing area outlet exceeds a second illumination intensity threshold, controlling the speed of ASA emulsion flowing from the inlet of the feed area to the atomizer to decrease.
In an alternative embodiment of the invention, the method further comprises:
if the ASA powder particle size is greater than the upper particle size threshold, controlling the rate of ASA emulsion flow from the inlet of the feed section to the spraying device to decrease.
In an alternative embodiment of the present invention, controlling the blower to blow a drying medium into the drying part includes:
adjusting the actual temperature of the drying medium to an initial temperature, wherein the initial temperature is positively correlated to the speed at which the ASA emulsion flows to the spraying device;
blowing the drying medium with the temperature adjusted into the drying part;
if the particle size of the ASA powder is greater than the upper particle size threshold, the actual temperature of the drying medium is raised until the particle size of the ASA powder is not greater than the upper particle size threshold.
In an alternative embodiment of the invention, the method further comprises:
and if the actual temperature of the drying medium reaches the preset upper temperature limit, increasing the flow speed of the drying medium.
In an alternative embodiment of the invention, the specified number is a preset value; alternatively, the specified amount is inversely related to the rate at which ASA emulsion flows from the inlet of the feed section to the spraying device.
In a second aspect, the present invention provides an apparatus for preparing ASA powder based on a spray drying process, the apparatus being applied to a control device for carrying out the process of the first aspect.
In a third aspect, the present invention provides an electronic device, comprising:
a processor; and
a memory arranged to store computer executable instructions which, when executed, cause the processor to perform the method of the first aspect.
In a fourth aspect, the present invention provides a computer-readable storage medium storing one or more programs, which when executed by an electronic device comprising a plurality of application programs, cause the electronic device to perform the method of the first aspect.
Drawings
In order to more clearly illustrate the embodiments or prior art solutions of the present application, the drawings that are required for the description of the embodiments or prior art will be briefly described below, it being apparent that the drawings in the following description are only some of the embodiments described in the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a flow chart of a method for preparing ASA powder based on a spray drying process in one embodiment of the present application;
FIG. 2 is a schematic structural view of an apparatus for preparing ASA powder based on spray drying in the examples of the present application;
fig. 3 is a schematic structural diagram of an embodiment of an electronic device according to the present application.
Detailed Description
For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The invention will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, some operations associated with the present application have not been shown or described in the specification to avoid obscuring the core portions of the present application, and may not be necessary for a person skilled in the art to describe in detail the relevant operations based on the description herein and the general knowledge of one skilled in the art.
Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated.
ASA has good mechanical physical properties. ASA and ABS are structurally similar, being composed of acrylonitrile and butadiene rubber, which retains the excellent mechanical and physical properties of ABS as an engineering plastic. In addition, ASA has strong weather resistance. When a double bond is contained in a polymer, the double bond is easily opened by ultraviolet rays in sunlight having a large energy intensity, and the aging resistance of the polymer is lowered. The ASA replaces butadiene rubber containing unsaturated double bonds in ABS with acrylic rubber containing no unsaturated double bonds, so that the ABS can resist degradation, aging and fading caused by ultraviolet irradiation, and meanwhile, the degradation or discoloration caused by high temperature in the oxidation processing process in the atmosphere is strongly ensured, so that the aging resistance and weather resistance of the material are greatly improved. According to the test result, the aging resistance of ASA is more than 10 times that of ABS. ASA also has a relatively good high temperature resistance, and ASA is an antistatic material which can reduce dust accumulation on the surface. That is, ASA has a wide application space.
In the automotive field, ASA does not develop grey as well after prolonged weathering as specially treated aging-resistant ABS (many microscopic cracks and cavitation on the surface due to weathering or water currents). Typical applications of ASA are exterior parts of exterior mirrors, radiator grilles, tail baffles, lamp covers, etc. that are subjected to severe conditions such as sun and rain, strong wind blows, etc. And the motorcycle panel, the camping automobile, the small hull, the surfboard and other fields are gradually extended.
In the horticulture field ASA has proven to be particularly suitable for horticulture irrigation equipment, lawn mower housings and the like.
In the field of electronics, housings for durable devices are preferred, such as: all-weather housings for sewing machines, telephones, kitchen equipment, satellite antennas, etc.
ASA/PVC blends have been used in roofing siding and window type materials in the construction field for practical applications for over 10 years abroad.
However, ASA itself has poor coloring ability, and uneven surface color, and even pearlescent five-color phenomena often occur in the application process of ASA materials. In general, this problem can be achieved by selecting ASA powder of smaller particle size and concentrated particle size distribution to prepare the product.
In the related art, ASA is treated by flocculation, washing and then is dried by adding an ebullated bed, the technology needs to add flocculant, most of the flocculant is inorganic salt, and in order to remove the flocculant, many factories filter and wash flocculated materials, and the content of the flocculant in ASA can be reduced, but the wastewater is increased, so that the environment is polluted. The wet materials after washing and filtering are dried by a fluidized bed, so that the wet materials are comprehensively processed from emulsion to finished products through three steps, and wastewater is generated.
Therefore, how to prepare ASA powder with smaller particle size and concentrated particle size distribution, and avoid the use of flocculating agent as much as possible in the preparation process, is a problem to be solved urgently.
Various non-limiting embodiments of the present application are described in detail below with reference to the attached drawing figures.
The invention provides a method for preparing ASA powder based on a spray drying method, which is based on an ASA drying system; the system comprises: the device comprises a feeding part, an atomizing part, a gating control part, a recycling part, a drying part and control equipment.
Wherein, the feeding part, the atomizing part, the recovery part and the drying part are provided with cavities for gas and colloid to flow. The feed section is used to convey the ASA emulsion to the atomizing section, which is optionally a hopper. The atomizing section is used to atomize the ASA emulsion fed from the feeding section into small droplets (i.e., mist). The gating control part is used for controlling the atomizing part to be communicated with one of the recovery part and the drying part, and optionally, the gating control part is a gating switch. The recovery part is used for recovering the ASA mist discharged from the atomization part, optionally, the recovery part is provided with a liquid pump and a liquid level detector, and when the liquid level detector detects that the liquid level of the ASA emulsion in the recovery part is higher than a preset liquid level threshold value, the liquid pump is started to pump the ASA emulsion in the recovery part into the feeding part. The drying part is used for drying the ASA mist discharged from the atomizing part into ASA powder. The inside of drying part is provided with the fan, and the fan is blown into the drying part inside with the dry medium. Alternatively, the drying medium used in the method of the present invention may be air, nitrogen, argon, helium or a mixture of the foregoing gases.
The connection relation of each part is as follows: the outlet of the feeding part is connected with the inlet of the atomizing part, and the outlet of the atomizing part is connected with the inlet of one of the recovery part and the drying part through the gating control part; the control equipment is electrically connected with the feeding part, the atomizing part, the gating control part and the drying part respectively. Alternatively, the outlet of the recovery part is connected with the inlet of the feeding part, so that the ASA emulsion recovered by the recovery part can be recovered by the feeding part, thereby avoiding raw material waste.
In addition, the spraying device is arranged at the inlet of the atomizing part, and devices which can perform atomization treatment on liquid and emulsion in the related art can be used as the spraying device in the invention.
A plurality of optical detection assemblies are sequentially arranged on the inner wall of the atomization part along the flowing direction of ASA fog. The optical detection assembly includes: the system comprises a light emitter, a first illumination intensity sensor and a second illumination intensity sensor. The first illumination intensity sensor and the illuminator are opposite to each other in the direction perpendicular to the flowing direction, and the second illumination intensity sensor is arranged between the first illumination intensity sensor and the illuminator on the inner wall of the atomizing part.
Particle size refers to the size of the particles. Typically the size of the sphere particles is indicated by the diameter and the size of the cube particles is indicated by the side length. For irregular particles, a certain sphere diameter that behaves the same as the particle may be taken as the equivalent diameter of the particle. The particle size is usually indicated by indexes such as D50, D97, specific surface area and the like. The light emitter is used for emitting light in a specified wavelength range, and the wavelength of the light emitted by the light emitter can be determined according to the requirements of users. Preparing the maximum value of the particle size range of the ASA powder target, namely the upper limit threshold value of the particle size; the minimum value of the particle size range targeted for preparing ASA powder is the lower threshold of particle size. In an alternative embodiment of the invention, the wavelength emitted by the light emitter is positively correlated with the variance of the upper and lower granularity thresholds. That is, the method of the present invention adapts the preparation of ASA powder of different target particle sizes by adjusting the wavelength of the light emitted by the light emitter.
The method for preparing ASA powder based on spray drying method in the invention is carried out by a control device, and comprises the following steps:
s100: and controlling the outlet of the atomization part to be communicated with the inlet of the recovery part.
At the beginning of the method execution, the system does not reach a stable state, when the particle size of liquid drops contained in the ASA mist discharged from the atomization part is possibly not matched with the particle size of target ASA powder, the outlet of the atomization part is communicated with the inlet of the recovery part, so that the ASA mist discharged from the atomization part is condensed into ASA emulsion in the recovery part, and the recovery of the ASA emulsion is realized.
S102: controlling the feeding part to flow ASA emulsion from the inlet of the feeding part to the spraying device.
In order to ensure the feeding speed, the flow rate of the ASA emulsion flowing from the inlet of the feeding part to the spraying device is almost equal to the flow rate of the ASA mist sprayed by the spraying device. Optionally, a high-pressure pump is arranged in the spraying device, and the high-pressure pump can pump the ASA emulsion sent by the feeding part into a nozzle of the spraying device.
S104: and controlling the spraying device to spray the ASA emulsion into the cavity inside the atomization part at a preset initial speed.
This step is capable of atomizing the ASA emulsion into ASA mist.
S106: if the illumination intensity detected by each optical detection assembly is larger than a first illumination intensity threshold value, and the difference between the optical intensities detected by the specified number of optical detection assemblies closest to the outlet of the atomizing part does not exceed a second illumination intensity threshold value; the gating control part is controlled to communicate the outlet of the atomizing part with the inlet of the drying part so that the ASA mist flows to the drying part.
In an alternative embodiment of the present invention, for a certain optical detection component, an average value of illumination intensities detected by the first illumination intensity sensor and the second illumination intensity sensor included in the optical detection component may be used as the illumination intensity detected by the optical detection component. Wherein the first illumination intensity threshold is positively correlated with the speed at which ASA emulsion flows from the inlet of the feed section to the spraying device. Optionally, the second illumination intensity threshold is inversely related to the volume of the atomizing area.
In addition, the light intensity threshold is also an amount related to the ASA emulsion ingredients and needs to be determined by a binding test.
The light emitting part and the illumination intensity sensor are arranged in a forward direction or a lateral direction, and if the light emitted by the light emitting part is refracted by the liquid drop in the atomizing part, the illumination intensity sensor can detect the refracted light. If the light emitted from the light emitting portion is reflected by the liquid droplets in the atomizing portion, the refracted light is less likely to be detected by the illuminance sensor.
It is known from the tyndall effect that when a beam of light passes through the colloid, a bright "path" is observed in the colloid from the direction perpendicular to the incident light, which is known as the tyndall phenomenon, also known as the tyndall effect. When light irradiates the particles in the light propagation process, if the particles are many times larger than the wavelength of incident light, light reflection occurs; if the particles are smaller than the wavelength of the incident light, scattering of light occurs, and light emitted around the particles by the light waves is observed, which is called scattered light or opalescence. The tyndall effect is a scattering phenomenon of light or opalescence phenomenon.
The illumination intensity detected by each optical detection assembly is greater than a first illumination intensity threshold, which indicates that the ASA droplet has a particle size not greater than an upper particle size threshold when passing through the location of each optical assembly.
The difference between the optical intensities detected by the specified number of optical detection assemblies nearest the atomizer outlet does not exceed a second illumination intensity threshold, indicating that the ASA droplets are no longer coagulated at a location adjacent the atomizer outlet and that the ASA droplets thereafter enter the dryer section, also retaining their particle size.
The particle size of the liquid drops directly affects the particle size of the ASA powder, and therefore, the method can accurately control the particle size of the ASA powder.
In an alternative embodiment of the invention, the specified number is a preset value, which can be set according to the needs of the user. In another alternative embodiment of the invention, the specified amount is inversely related to the speed at which ASA emulsion flows from the inlet of the feed section to the spraying device.
S108: and controlling the fan to blow a drying medium into the drying part so as to obtain ASA powder at the outlet of the drying part.
The wind blown into the drying part by the fan can take away the liquid phase part in the ASA liquid drops, and the rest solid phase part is ASA powder.
In the method, flocculant is not needed in the process of preparing ASA powder, so that the material cost can be reduced; on the other hand, without a washing process, the generation of waste water can be avoided. In addition, the method can control the granularity of ASA powder more accurately, and is more suitable for preparing ASA powder with small granularity.
Further, the technical scheme controls the production process of the ASA powder through the thought of taking the result as a guide, so long as the granularity of the obtained ASA liquid drops meets the requirement, the granularity of the obtained ASA powder meets the requirement, and the specification, the shape and the size of equipment adopted in the process can be determined according to the actual production condition of a user, thereby being beneficial to reducing the equipment cost.
In addition, the method of the invention has no limitation on the components and the content of the ASA emulsion, and the preparation process of the ASA emulsion can be designed according to the actual production condition.
In an alternative embodiment of the invention, the spraying device is controlled to reduce the particle size of the ASA mist if the intensity of the illumination detected by the at least one optical detection assembly is not greater than a first threshold intensity of illumination, indicating that the particle size of the ASA droplets is too large. As to how the spraying device is controlled, it can be determined according to the working principle of the spraying device actually used. In the alternative, the spraying device is a sprayer, and the sprayer comprises a rotary vane and a spray vane, so that the working states of the rotary vane and the spray vane can be adjusted, and the granularity of liquid drops can be adjusted.
In addition, if the difference between the optical intensities detected by the specified number of optical detection assemblies adjacent to the outlet of the atomizer portion exceeds a second illumination intensity threshold value, which indicates that the ASA droplets are significantly coagulated during the flow of the ASA droplets inside the atomizer portion, the speed of the ASA emulsion flowing from the inlet of the feeding portion to the atomizer device is controlled to be reduced so as to reduce the distribution density of the ASA droplets in the atomizer portion.
Optionally, a particle size detection device is arranged at the outlet of the drying part, if the particle size of the ASA powder is detected to be larger than the upper threshold value of the particle size, the particle size of the ASA powder is excessively large, the ASA emulsion is controlled to flow from the inlet of the feeding part to the spraying device to reduce the speed when the surface charge changes and the collision record between ASA liquid drops is increased due to wind blown by a fan during the process of removing water in the drying part.
In an alternative embodiment of the invention, the temperature of the air blown by the fan is also controlled in order to increase the efficiency of the ASA powder. In an alternative embodiment of the invention, the actual temperature of the drying medium is adjusted to an initial temperature, which is positively correlated to the speed of the ASA emulsion flowing to the spraying device, prior to the ASA mist entering the dryer section. Then, the temperature-adjusted drying medium is blown into the inside of the drying section. The initial temperature may also be determined in conjunction with experimentation.
After the ASA mist enters the dryer section, the particle size of the ASA powder is detected, and if the particle size of the ASA powder is greater than an upper particle size threshold, indicating that the liquid phase in the ASA droplets is not timely removed, causing the ASA droplets to coagulate inside the dryer section, the actual temperature of the drying medium may be raised until the particle size of the ASA powder is not greater than the upper particle size threshold.
In a further optional embodiment of the present invention, in at least two adjacent optical detection assemblies of the plurality of optical detection assemblies, if a difference between the illuminance detected by the first illuminance sensor and the illuminance detected by the second illuminance sensor is greater than a preset illuminance threshold, the spraying device is restarted.
The ASA powder has a certain influence on the performance at high temperature, and the temperature of the drying medium is not too high. In an alternative embodiment of the invention, the temperature of the drying medium may be in the range of 150-200 ℃. If the actual temperature of the drying medium has reached the upper temperature limit, but the ASA particle size is still too large, the flow rate of the drying medium can be increased to rapidly carry the liquid phase in the ASA droplets.
The ASA drying system comprises: the device comprises a feeding part, an atomizing part, a gating control part, a recycling part, a drying part and control equipment; the outlet of the feeding part is connected with the inlet of the atomizing part, and the outlet of the atomizing part is connected with the inlet of one of the recovery part and the drying part through the gating control part; the control equipment is electrically connected with the feeding part, the atomizing part, the gating control part and the drying part respectively.
Based on the same idea, the embodiment of the present invention also provides an apparatus for preparing ASA powder based on a spray drying method corresponding to part of the process shown in fig. 1.
As shown in fig. 2, the apparatus for preparing ASA powder based on spray drying method, which is applied to a control device, may include one or more of the following modules:
the ASA drying system comprises: the device comprises a feeding part, an atomizing part, a gating control part, a recycling part, a drying part and control equipment; the outlet of the feeding part is connected with the inlet of the atomizing part, and the outlet of the atomizing part is connected with the inlet of one of the recovery part and the drying part through the gating control part; the control equipment is electrically connected with the feeding part, the atomizing part, the gating control part and the drying part respectively.
The first communication control module 200 is configured to: and controlling the outlet of the atomization part to be communicated with the inlet of the recovery part.
A feed module 202 configured to: controlling the feeding part to flow ASA emulsion from the inlet of the feeding part to the spraying device.
An atomization control module 204 configured to: and controlling the spraying device to spray the ASA emulsion into a cavity inside the atomization part at a preset initial speed so as to atomize the ASA emulsion into ASA mist.
A second connectivity control module 206 configured to: if the illumination intensity detected by each optical detection assembly is larger than a first illumination intensity threshold value, and the difference between the optical intensities detected by the specified number of optical detection assemblies closest to the outlet of the atomizing part does not exceed a second illumination intensity threshold value; controlling the gating control part to communicate the outlet of the atomizing part with the inlet of the drying part so that ASA mist flows to the drying part; wherein the first illumination intensity threshold is positively correlated with the speed at which ASA emulsion flows from the inlet of the feed section to the spraying device.
A drying control module 208 configured to: and controlling the fan to blow a drying medium into the drying part so as to obtain ASA powder at the outlet of the drying part.
In an alternative embodiment of the invention, the second connectivity control module 206 is further configured to: and if the illumination intensity detected by the at least one optical detection assembly is not greater than the first illumination intensity threshold value, controlling the spraying device to reduce the particle size of the liquid drops in the ASA mist.
In an alternative embodiment of the invention, the second connectivity control module 206 is further configured to: if the difference between the optical intensities detected by a designated number of optical detection assemblies adjacent to the atomizing area outlet exceeds a second illumination intensity threshold, controlling the speed of ASA emulsion flowing from the inlet of the feed area to the atomizer to decrease.
In an alternative embodiment of the invention, the drying control module 208 is further configured to: if the ASA powder particle size is greater than the upper particle size threshold, controlling the rate of ASA emulsion flow from the inlet of the feed section to the spraying device to decrease.
In an alternative embodiment of the invention, the drying control module 208 is further configured to: adjusting the actual temperature of the drying medium to an initial temperature, wherein the initial temperature is positively correlated to the speed at which the ASA emulsion flows to the spraying device; blowing the drying medium with the temperature adjusted into the drying part; if the particle size of the ASA powder is greater than the upper particle size threshold, the actual temperature of the drying medium is raised until the particle size of the ASA powder is not greater than the upper particle size threshold.
In an alternative embodiment of the invention, the drying control module 208 is further configured to: and if the actual temperature of the drying medium reaches the preset upper temperature limit, increasing the flow speed of the drying medium.
In an alternative embodiment of the invention, the specified number is a preset value; alternatively, the specified amount is inversely related to the rate at which ASA emulsion flows from the inlet of the feed section to the spraying device.
Fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application. Referring to fig. 3, at the hardware level, the electronic device includes a processor, and optionally an internal bus, a network interface, and a memory. The Memory may include a Memory, such as a Random-Access Memory (RAM), and may further include a non-volatile Memory (non-volatile Memory), such as at least 1 disk Memory. Of course, the electronic device may also include hardware required for other services.
The processor, network interface, and memory may be interconnected by an internal bus, which may be an ISA (Industry Standard Architecture ) bus, a PCI (Peripheral Component Interconnect, peripheral component interconnect standard) bus, or EISA (Extended Industry Standard Architecture ) bus, among others. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one bi-directional arrow is shown in FIG. 3, but not only one bus or type of bus.
And the memory is used for storing programs. In particular, the program may include program code including computer-operating instructions. The memory may include memory and non-volatile storage and provide instructions and data to the processor.
The processor reads the corresponding computer program from the nonvolatile memory into the memory and then runs the computer program to form a method for preparing ASA powder based on a spray drying method on a logic level. A processor, executing the program stored in the memory, and specifically for executing any one of the aforementioned methods for preparing ASA powder based on spray drying.
The method for preparing ASA powder based on spray drying disclosed in the embodiment shown in FIG. 1 of the present application can be applied to or implemented by a processor (i.e., a deletion control module in the present invention). The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but also digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.
The electronic device may also perform a method for preparing ASA powder according to fig. 1 based on a spray drying method, and implement the functions of the embodiment shown in fig. 1, which is not described herein.
The embodiments also provide a computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by an electronic device comprising a plurality of application programs, enable the electronic device to perform a method of performing a method of preparing ASA powder based on a spray drying method in the embodiment shown in fig. 1, and in particular to perform any of the aforementioned methods of preparing ASA powder based on a spray drying method.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Disks (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims (7)

1. A method for preparing ASA powder based on a spray drying process, characterized in that the method is based on an ASA drying system; the system comprises: the device comprises a feeding part, an atomizing part, a gating control part, a recycling part, a drying part and control equipment; the outlet of the feeding part is connected with the inlet of the atomizing part, and the outlet of the atomizing part is connected with the inlet of one of the recovery part and the drying part through the gating control part; the control equipment is electrically connected with the feeding part, the atomizing part, the gating control part and the drying part respectively;
wherein, the inlet of the atomizing part is provided with a spraying device; a plurality of optical detection assembly has set gradually along ASA fog flow direction on the inner wall of atomizing portion, optical detection assembly includes: the device comprises a light emitter, a first illumination intensity sensor and a second illumination intensity sensor, wherein the first illumination intensity sensor and the light emitter are arranged opposite to each other in the direction perpendicular to the flowing direction, and the second illumination intensity sensor is arranged between the first illumination intensity sensor and the light emitter on the inner wall of the atomization part; a fan is arranged in the drying part;
the method comprises the following steps:
controlling the outlet of the atomization part to be communicated with the inlet of the recovery part;
controlling the feed section to flow ASA emulsion from an inlet of the feed section to the spraying device;
controlling the spraying device to spray ASA emulsion into a cavity in the atomization part at a preset initial speed so as to atomize the ASA emulsion into ASA mist;
if the illumination intensity detected by each optical detection assembly is larger than a first illumination intensity threshold value, and the difference between the optical intensities detected by the specified number of optical detection assemblies closest to the outlet of the atomizing part does not exceed a second illumination intensity threshold value; controlling the gating control part to communicate the outlet of the atomizing part with the inlet of the drying part so that ASA mist flows to the drying part; wherein the first illumination intensity threshold is positively correlated with the speed at which ASA emulsion flows from the inlet of the feed section to the spraying device;
controlling the fan to blow a drying medium into the drying part so as to obtain ASA powder at an outlet of the drying part;
if the illumination intensity detected by the at least one optical detection component is not greater than a first illumination intensity threshold value, controlling the spraying device to reduce the granularity of liquid drops in the ASA mist;
if the difference between the optical intensities detected by a designated number of optical detection assemblies adjacent to the atomizing area outlet exceeds a second illumination intensity threshold, controlling the speed of ASA emulsion flowing from the inlet of the feed area to the atomizer to decrease.
2. The method of claim 1, wherein the method further comprises:
if the ASA powder particle size is greater than the upper particle size threshold, controlling the rate of ASA emulsion flow from the inlet of the feed section to the spraying device to decrease.
3. The method of claim 1, wherein controlling the blower to blow drying medium into the interior of the dryer section comprises:
adjusting the actual temperature of the drying medium to an initial temperature, wherein the initial temperature is positively correlated to the speed at which the ASA emulsion flows to the spraying device;
blowing the drying medium with the temperature adjusted into the drying part;
if the particle size of the ASA powder is greater than the upper particle size threshold, the actual temperature of the drying medium is raised until the particle size of the ASA powder is not greater than the upper particle size threshold.
4. A method as claimed in claim 3, wherein the method further comprises:
and if the actual temperature of the drying medium reaches the preset upper temperature limit, increasing the flow speed of the drying medium.
5. The method of claim 1, wherein the specified amount is inversely related to a velocity of the ASA emulsion flowing from the inlet of the feed section to the spraying device.
6. An electronic device, comprising:
a processor; and
a memory arranged to store computer executable instructions which, when executed, cause the processor to perform the method of any of claims 1 to 5.
7. A computer readable storage medium, characterized in that the computer readable storage medium stores one or more programs, which when executed by an electronic device comprising a plurality of application programs, cause the electronic device to perform the method of any of claims 1-5.
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