CN102288009A - Automatic control system and method of fluidized bed for drying solid preparation - Google Patents
Automatic control system and method of fluidized bed for drying solid preparation Download PDFInfo
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- CN102288009A CN102288009A CN2011101639343A CN201110163934A CN102288009A CN 102288009 A CN102288009 A CN 102288009A CN 2011101639343 A CN2011101639343 A CN 2011101639343A CN 201110163934 A CN201110163934 A CN 201110163934A CN 102288009 A CN102288009 A CN 102288009A
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Abstract
The invention discloses an automatic control system of a fluidized bed for drying a solid preparation. The control system comprises a fan, a wind speed detection instrument, an air-out temperature monitor, an air processing unit, a temperature regulator, an air-in temperature monitor, a fluidized bed differential pressure gauge, a material temperature and humidity monitor and a control cabinet, wherein the fan is connected with a fluidized bed body through a pipeline; the wind speed detection instrument is arranged in a pipeline which is used for connecting the fan with the fluidized bed body; the air-out temperature monitor is arranged on the pipeline is which used for connecting the fan with the fluidized bed body; the air processing unit is connected with the fluidized bed body through a pipeline; the temperature regulator is arranged on the air processing unit; the air-in temperature monitor is arranged on a pipeline which is used for connecting the temperature regulator with the fluidized bed body; the fluidized bed differential pressure gauge and the material temperature and humidity monitor are arranged on the fluidized bed body; and the control cabinet is electrically connected with the components. The system and method provided by the invention can be used for the drying operation process of various materials under various complex working conditions, parameters can be regulated voluntarily, and the control effect is good; the drying efficiency is improved; and the particle yield is high, the fine powder is less, and the automation level of the automatic control process of the fluidized bed drying is improved.
Description
Technical field
The present invention relates to the system in a kind of machinery, electronics, control and Computer Applied Technology field, be specifically related to a kind of fluid bed automatic control system and control method thereof that is used for the solid pharmaceutical preparation drying.
Background technology
Production process at the pharmaceuticals industry solid pharmaceutical preparation; the drying of utilizing fluid bed to carry out molecule is equipped with the wet granulator modal a kind of granulation mode of granulating; this mode is owing to the production efficiency height, and the granular mass that makes is good, has obtained using widely at pharmacy corporation.
But, the dry run of fluid bed be many in the parameters interactional result that intercouples, control principle that it is dry and method be full maturity not also, using in a lot of engineerings is needing a large amount of processes of groping.
The fluidized bed drying control procedure is mainly by regulating manually and groping at present.Should prevent that the scene of sinking to the bottom from appearring in the excessive particle of stickiness; Also to prevent from material is flown De Taigao, cause particle fragmentation easily, finally to form fine powder too many, influences the particle recovery rate.
The embodiment of extensive employing is in the prior art: the air heat control method is set up and is become out or the pass pattern, stops logical steam when temperature reaches setting value, but the air themperature continuation rising that heat exchanger still had surplus heat and was this moment; When the needs air themperature rose as early as possible, heat exchanger was just started working again, and temperature rises slower, will cause temperature fluctuation big like this, and is sluggish big, influenced the effect of equipment drying.Along with the carrying out of dry run, factors such as the characteristic of material, supply bag resistance all can change, and can not make air quantity remain on best level by the adjusting of manually carrying out air quantity.
Summary of the invention
The present invention discloses a kind of fluid bed automatic control system and control method thereof that is used for the solid pharmaceutical preparation drying, can be used for the following dry running of various materials, can adjust voluntarily that parameter, control are effective, to improve drying efficiency, particle recovery rate height, fine powder few at multiple complex working condition.
For achieving the above object, the present invention discloses a kind of fluid bed automatic control system that is used for the solid pharmaceutical preparation drying, and this control system is arranged on fluidized bed by the side of, be connected the fluid bed lathe bed with circuit by pipeline, the running of control fluid bed is characterized in that this control system comprises:
Blower fan, this blower and pipeline connects above-mentioned fluid bed lathe bed;
Wind speed detector, this wind speed detector are arranged in the pipeline that connects above-mentioned blower fan and fluid bed lathe bed;
Leaving air temp monitor, this leaving air temp monitor are arranged on the pipeline outer wall that connects above-mentioned blower fan and fluid bed lathe bed;
Air conditioner unit, this air conditioner unit connects above-mentioned fluid bed lathe bed by pipeline;
Thermoregulator, this thermoregulator are arranged on the above-mentioned air conditioner unit;
EAT monitor, this EAT monitor are arranged on the pipeline that connects above-mentioned thermoregulator and fluid bed lathe bed;
Fluid bed differential pressure indicator and temperature of charge and humidity detection instrument, this fluid bed differential pressure indicator and temperature of charge and humidity detection instrument are separately positioned on one's body the above-mentioned fluidized bed; And,
Switch board, this switch board is connected with the humidity detection instrument circuit with above-mentioned blower fan, wind speed detector, leaving air temp monitor, air conditioner unit, thermoregulator, EAT monitor, fluid bed differential pressure indicator and temperature of charge respectively by cable.
The fan frequency converter, blast regulator and the input/output module that be provided with control module in the above-mentioned switch board, are connected respectively with above-mentioned control module circuit.
Above-mentioned control module comprises main control module, and the air quantity control module, the fluidized-bed temperature control module that are connected with this main control module circuit respectively, trembles a bag control module, air conditioner unit control module and the dry control module that stops;
Above-mentioned fluidized-bed temperature control module, tremble bag control module and the air conditioner unit control module is formed dry control module;
Above-mentioned air quantity control module also circuit connects above-mentioned fan frequency converter;
Above-mentioned fluidized-bed temperature control module also circuit connects above-mentioned thermoregulator;
Above-mentioned tremble bag control module also circuit connect be arranged on above-mentioned fluidized bed on one's body tremble bag system;
Above-mentioned air conditioner unit control module also circuit connects above-mentioned air conditioner unit;
Above-mentioned drying stops also circuit connection fluid bed of control module.
A kind of control method that is used for the fluid bed automatic control system of solid pharmaceutical preparation drying is characterized in that the method includes the steps of:
Step 1 tentatively preestablishes technological parameter, and this technological parameter comprises: air quantity initial target value, terminal point determining mode and corresponding value, thermoregulator opening value, EAT, tremble bag and control a parameter;
Step 5.1 main control module adopts the PID method that real-time desired value of air quantity and air measuring value are revised, and the air quantity control module is adjusted the work of blower fan according to the controlled quentity controlled variable of revised value adjustment fan frequency converter;
Step 5.2 main control module adopts the PID method that temperature of charge, EAT and leaving air temp are revised, and the fluidized-bed temperature control module is regulated the fluid bed internal temperature according to the aperture of revised value adjustment thermoregulator;
The dry control module that stops of step 6 judges whether the fluid bed operating state satisfies the terminal point determining value, if the dry run of then controlling fluid bed finishes, and if not, then proceeds drying, and jumps to step 3.
The present invention is used for the fluid bed automatic control system and the control method thereof of solid pharmaceutical preparation drying and compares with prior art, its advantage is, control system of the present invention is applicable to the following dry running of various materials at multiple complex working condition, the dry materials that can be used for multifrequency nature, can adjust voluntarily parameter, algorithm rationally, control is effective;
Adopt the PID method to revise technological parameter in real time, can shorten drying time, improve drying efficiency, simultaneously, particle recovery rate height, fine powder is few, and dry mass is good;
Control method drives fluid bed and works automatically, reduces personnel labor intensity, does not need manual intervention.
Description of drawings
Fig. 1 is used for the structural representation of the fluid bed automatic control system of solid pharmaceutical preparation drying for the present invention;
Fig. 2 is used for the module map of control module of the fluid bed automatic control system of solid pharmaceutical preparation drying for the present invention;
Fig. 3 is used for the method flow diagram of control method of the fluid bed automatic control system of solid pharmaceutical preparation drying for the present invention.
The specific embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention.
As shown in Figure 1, the present invention has illustrated a kind of fluid bed automatic control system that is used for the solid pharmaceutical preparation drying, and this control system comprises switch board 1, blower fan 2, leaving air temp monitor 3, fan frequency converter, wind speed detector, fluid bed differential pressure indicator 7, temperature of charge and humidity detection instrument 8, EAT monitor 9, thermoregulator 10 and air conditioner unit 11.
Fluid bed includes fluid bed lathe bed 4, and fluid bed inside is provided with hothouse, and the bottom of fluid bed is provided with and is the cavernous plate of fish scale shape, in its hothouse material is carried out dry run, and material forms sulphided state in fluid bed, realizes dry.
Fluid bed also includes trembles bag system 5, and this trembles the top that bag system 5 is arranged on fluid bed lathe bed 4.This is trembled bag system 5 and is provided with cylinder, and it realizes pumping by trembling a bag cylinder drive, carries out in the dry process at material, prevents that material from sticking at a product of trembling bag surface and minimizing segmentation.
Be provided with at the side of fluid bed lathe bed 4 and tremble bag differential pressure indicator 6, tremble bag differential pressure indicator 6 and connect switch board 1 by the shielding line circuit.This is trembled bag differential pressure indicator 6 and is arranged on that to tremble bag system 5 other, and monitoring is in real time trembled and trembled the inside and outside pressure differential of bag in the bag system 5.
Fluid bed differential pressure indicator 7 and temperature of charge and humidity detection instrument 8 are successively set on the side of fluid bed lathe bed 4 from top to bottom, and fluid bed differential pressure indicator 7 and temperature of charge are connected switch board 1 with humidity detection instrument 8 by the shielding line circuit.Fluid bed differential pressure indicator 7 monitoring fluid bed internal pressure in real time is poor, and simultaneously, temperature of charge and humidity detection instrument 8 be the temperature and humidity of monitoring fluid bed materials inside in real time, to determine whether dry run is finished an index.
It is other that blower fan 2 is arranged on fluid bed lathe bed 4.Fluid bed lathe bed 4 tops are connected with pipeline, this pipeline is extended to the bottom of fluid bed lathe bed 4 by fluid bed lathe bed 4 tops, and be arranged on ground blower fan 2 and be connected, this blower fan 2 is by this pipeline and fluid bed internal communication, bleeding by blower fan 2 makes the inner negative pressure that forms of fluid bed, makes fluid bed internal circulation air.
Leaving air temp monitor 3 is arranged on the pipeline outer wall that is used to connect fluid bed lathe bed 4 and blower fan 2, and connects switch board 1 by the shielding line circuit, and monitoring in real time transfers to switch board 1 by the temperature of air-out in the fluid bed with leaving air temp information.
Also be provided with the air monitoring instrument between blower fan 2 and fluid bed in the pipe of pipeline, the air monitoring instrument connects switch board 1 by the shielding line circuit, and this air monitoring instrument is used to detect the wind speed of current blower fan 2 pipeline sections, and wind speed information is transferred to switch board 1.
Thermoregulator 10 is arranged on the air conditioner unit 11, is used to control the air themperature that enters fluid bed inner drying chamber.The aperture of thermoregulator 10 control valves, the aperture of valve drives the aperture of cold and hot wind shutter on the air conditioner unit 11, controls the ratio of cold and hot wind regime, and then the temperature of control hot-air.
On the pipeline that connects air conditioner unit 11 and fluid bed, also be provided with EAT monitor 9, and connect switch board 1 by the shielding line circuit.After monitoring is carried out adjustment by thermoregulator 10 in real time,, and transfer to switch board 1 from the air themperature of air conditioner unit 11 to the fluid bed transmission.
Switch board 1 is arranged in the control area of far-end, is connected with each parts (blower fan 2, leaving air temp monitor 3, fan frequency converter, wind speed detector, fluid bed differential pressure indicator 7, temperature of charge and humidity detection instrument 8, EAT monitor 9, thermoregulator 10 and air conditioner unit 11) circuit of above-mentioned control system by cable.The fan frequency converter and the blast regulator that be provided with control module in this switch board 1, are connected respectively with the control module circuit, and the input/output module that is connected with the control module circuit.Fan frequency converter is connected with blower fan 2 circuit respectively with blast regulator, and fan frequency converter and blast regulator are used to regulate the air output of blower fan 2.Input/output module adopts touch-screen, is used for the information of indicative control unit and the monitoring information of each monitoring device, and to the control module sending controling instruction.
As shown in Figure 2, control module comprises main control module 12, and the air quantity control module 13 that is connected with main control module 12 circuit respectively, dry control module 14 and the dry control module 15 that stops.
Wherein, main control module 12 adopts Siemens PLC C 300, also can use Siemens 313C, and air quantity control module 13 adopts Siemens module SM323, and the dry control module 15 that stops adopts Siemens module SM323, SM334.
The input of air quantity control module 13 also connects air monitoring instrument and temperature of charge and humidity detection instrument 8 by the shielding line circuit, and its output also connects fan frequency converter and blast regulator by the shielding line circuit.
Air quantity control module 13 is used to control the required air input of fluidized bed drying process, can effectively control and regulate air input.Air quantity control module 13 is monitored fluid bed internal temperature and wind speed in real time and is transferred to main control module 12, and main control module 12 draws required air quantity according to the dried water content of characteristic, needs of material, the specification of fluid bed.Simultaneously, revise as the corresponding air quantity of carrying of input according to fluid bed internal temperature that collects in the dry run and air monitoring instrument.According to revised air quantity, air quantity, drying time, the present humidity value at present of needs in theory, main control module 12 is regulated institute's required airflow by the frequency of air quantity control module 13 control fan frequency converters by sending air quantity regulating command and size to air quantity control module 13.
Dry control module 14 is used to control the dry run of fluid bed, read the various input quantities that are used to control, calculate and analyze for main control module 12, the information of reading in comprises the monitoring information of trembling bag differential pressure indicator 6, fluid bed differential pressure indicator 7, temperature of charge and humidity detection instrument 8, EAT monitor 9, air monitoring instrument (being installed on the cross-section of pipeline that inserts blower fan 2).Read in variable according to each monitor information, and make timely adjustment, the running of control fluid bed.
Dry control module 14 includes the fluidized-bed temperature control module 141 that is connected with main control module 12 circuit respectively, trembles bag control module 142 and air conditioner unit control module 143.Fluidized-bed temperature control module 141 adopts Siemens module SM323, trembles bag control module 142 and adopts Siemens module SM323, SM334, and air conditioner unit control module 143 adopts Siemens module SM323, SM334.
The input of fluidized-bed temperature control module 141 connects material temperature and humidity monitor 8 by the shielding line circuit, and its output connects thermoregulator 10 by the shielding line circuit.
Fluidized-bed temperature control module 141 is carried out temperature control according to the real-time amount of temperature of charge in the dry run and humidity detection instrument 8 measured materials and is handled, and output valve fed back to main control module 12, main control module 12 control fluidized-bed temperature control modules 141 drive corresponding thermoregulator 10, and its main control parameter comprises: the aperture of EAT, leaving air temp, temperature of charge, thermoregulator.The PID method is adopted in the adjustment correction, with target temperature and Current Temperatures linearisation, adopt the PI parameter to calculate again, the digital quantity of output is through the DA conversion, be transported to thermoregulator 10, thermoregulator 10 can be controlled the aperture of the cold and hot wind shutter in the air conditioner unit 11 according to analog quantity, and then the temperature of control hot-air.
The input of trembling bag control module 142 connects by the shielding line circuit trembles bag differential pressure indicator 6, and its output connects by the shielding line circuit trembles bag system 5.
Tremble bag control module 142 and be used for the motion control that fluid bed is trembled bag.Tremble bag and drive, realize pumping by trembling bag cylinder.Mainly need the parameter of control to comprise: to tremble bag number of times of trembling in a bag frequency, unit interval.According to the material characteristics decision parameter value that is dried.Material carries out in the dry process, is bonded at the product of trembling bag surface and unfinished minimizing segmentation for preventing material, need tremble pumping of bag system 5.Main control module 12 is provided with the control parameter of main control module 12 according to arts demand, and is general, the parameter of trembling bag system 5 can be set be: tremble a bag time 15S, tremble bag frequency 2S/ time, tremble a bag 10S at interval.
The input of air conditioner unit control module 143 connects EAT monitor 9 by the shielding line circuit, and its output connects air conditioner unit 11 by the shielding line circuit.
Air conditioner unit control module 143 is used to look the requirement of environment temperature, ambient humidity, EAT, and the processing of 11 pairs of air of control air conditioner unit is as cold water dehumidifying, defrost preheating, air filtration.The major parameter that air conditioner unit control module 143 is controlled comprises: pressure difference, humidity and temperature value.Air conditioner unit control module 143 monitoring EAT in real time transfers to main control module 12, and main control module 12 sends instruction according to this information to air conditioner unit control module 143, control air conditioner unit 11.
Dry termination control module 15 is used to realize the termination of whole dry run, its inlet circuit connects leaving air temp monitor 3, temperature of charge and humidity detection instrument 8, EAT monitor 9, its circuit of output terminal connects fluid bed, the above-mentioned information transmission of its monitoring in real time main control module 12, main control module 12 stops the termination that control module 15 sends the instruction control flow bed according to terminal point determining mode that presets and corresponding value to drying, and this terminal point determining mode and corresponding value comprise following four kinds of different embodiments:
(1) according to main control module 12 is to the regulation drying time that drying termination control module 15 is provided with in advance, Preset Time stops dry run to then controlling fluid bed.
(2) measure by the temperature of charge and the humidity detection instrument 8 that are installed on the fluid bed,, just control fluid bed and stop dry run when the moisture readings of temperature of charge and humidity detection instrument 8 has reached the numeral of default appointment.
(3) measure by the temperature of charge and the humidity detection instrument 8 that are installed on the fluid bed,, just control fluid bed and stop dry run when the temperature value reaches default designated value according to temperature of charge.
(4) detect the EAT of input fluid bed by EAT monitor 9, and detect the leaving air temp of output fluid bed by leaving air temp monitor 3.Poor according to leaving air temp and EAT just controlled fluid bed and stops dry run when this difference reaches default designated value.
Illustrate that below in conjunction with Fig. 3 the present invention is used for the control method of the fluid bed automatic control system of solid pharmaceutical preparation drying, the method includes the steps of.
Step 1 material that is dried is sent into the hothouse of fluid bed by conveyance conduit or hopper.Before the beginning fluidized bed drying process, at first according to the dried material characteristic, parameters such as the specification of fluid bed, current environment humiture, tentatively preestablish technological parameter, this technological parameter comprises: air quantity initial target value, terminal point determining mode and corresponding value, thermoregulator opening value, EAT, tremble bag and control a parameter.For example: the air quantity initial target value generally speaking, the particle of the material that is dried is little, total amount is light, it is 40% that air quantity control module 13 is provided with the air quantity initial target value; Otherwise the particle of the material that is dried is big, and total amount is heavy, and the air quantity initial target value is made as 60%.Wherein, terminal point determining can select leaving air temp value side to set, and the temperature value mode is promptly set leaving air temp and reached certain number of degrees and just finish dry run, is made as 60 degree usually.The thermoregulator opening value is used for controlling the aperture of aperture valve, and in start just, this value generally is made as 100%.General initial 50 degree that are made as of EAT.Tremble the operation that bag is trembled in the control of bag control parameter, generally speaking, bag time of trembling is 10 seconds, and trembling bag frequency is 2 times, trembles bag and is spaced apart 10 seconds.
The PID control method is a control mode common in Industry Control Application.The PID controller is the data collected and the required value of setting, compares as leaving air temp etc., then this difference is used to calculate new input value, and the purpose of the input value that this is new is can allow the data of system reach or remain on reference value.
Step 5.1 main control module 12 adopts the PID method that real-time desired value of air quantity and air measuring value are revised, and according to revised value air quantity control module 13 is adjusted to the controlled quentity controlled variable of fan frequency converter.Air quantity control module 13 outputs to this value in the fan frequency converter, with the air quantity of control blower fan 2.In engineering reality, widely used adjuster control law is ratio, integration, differential control, is called PID and regulates.With in the fluid bed, it is better to adopt following PID that effect is set in drying.Wherein, pid parameter is set at: ratio P=0.8%, the time of integration TI=35S, derivative time TD=0S.
Step 5.2 main control module 12 adopts the PID method that temperature of charge, EAT and leaving air temp are revised, and according to revised value fluidized-bed temperature control module 141 controlled quentity controlled variables is adjusted.Fluidized-bed temperature control module 141 is according to the aperture of the controlled quentity controlled variable control thermoregulator of revising 10, and thermoregulator 10 is regulated the fluid bed internal temperature by regulating the ratio of hot blast and cold wind.
The dry control module 15 that stops of step 6 judges according to terminal point determining mode that presets and corresponding value whether the fluid bed operating state satisfies the terminal point determining value, if, the dry run of then controlling fluid bed finishes, if not, then proceed drying, and jump to step 3.
This step 6 includes following four kinds of embodiments.
One, the dry control module 15 that stops has judged whether that main control module 12 stops the regulation drying time that control module 15 is provided with to drying in advance, and generally speaking can get 30 minutes this drying time.When humidity of materials is very big, the proper extension time.If, reaching drying time of regulation, the then dry control module 15 control fluid beds that stop stop dry run.If not, then fluid bed continues material is carried out drying, and jumps to step 3.
Two, temperature of charge and the humidity detection instrument 8 that is installed on the fluid bed measured material temperature and humidity in the fluid bed, the dry control module 15 that stops judges whether the humidity of material in the fluid bed reaches main control module 12 and stop the humidity of the appointment that control module 15 presets to drying, and generally speaking this humidity set absolute humidity is 10 gram/cubic metres of air.If the then dry control module 15 control fluid beds that stop stop dry run.If not, then fluid bed continues material is carried out drying, and jumps to step 3.
Three, temperature of charge and the humidity detection instrument 8 that is installed on the fluid bed measured material temperature and humidity in the fluid bed, the dry control module 15 that stops judges whether material temperature reaches default assigned temperature value in the fluid bed, generally speaking desirable 50 degree of this temperature value, if the then dry control module 15 control fluid beds that stop stop dry run.If not, then fluid bed continues material is carried out drying, and jumps to step 3.
Four, EAT monitor 9 detects the EAT of input fluid bed, and detects the leaving air temp of output fluid bed by leaving air temp monitor 3.Main control module 12 calculates the temperature difference of its leaving air temp and EAT, and transfer to the dry control module 15 that stops, the dry control module 15 that stops judges whether the difference of leaving air temp and EAT reaches default designated value, generally speaking this difference desirable 5 is spent, and EAT is higher than leaving air temp.If the then dry control module 15 control fluid beds that stop stop dry run.If not, then fluid bed continues material is carried out drying, and jumps to step 3.
The present invention is applicable to the following dry running of various materials at multiple complex working condition, can be used for the dry materials of multifrequency nature, comprises the Chinese medicinal granule that stickiness is high, can adjust parameter, algorithm advantages of simple voluntarily, control is effective.Can shorten drying time 10%, improve drying efficiency.Particle recovery rate height, fine powder is few, dry mass is good, effectively the particle recovery rate reach 〉=92%.Reduce personnel labor intensity, do not need manual intervention.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (5)
1. it is other that fluid bed automatic control system that is used for the solid pharmaceutical preparation drying, this control system are arranged on fluid bed lathe bed (4), is connected fluid bed lathe bed (4) with circuit by pipeline, and the control fluid bed operates, and it is characterized in that this control system comprises:
Blower fan (2), this blower fan (2) connects described fluid bed lathe bed (4) by pipeline;
Wind speed detector, this wind speed detector are arranged in the pipeline that connects described blower fan (2) and fluid bed lathe bed (4);
Leaving air temp monitor (3), this leaving air temp monitor (3) are arranged on the pipeline outer wall that connects described blower fan (2) and fluid bed lathe bed (4);
Air conditioner unit (11), this air conditioner unit (11) connects described fluid bed lathe bed (4) by pipeline;
Thermoregulator (10), this thermoregulator (10) are arranged on the described air conditioner unit (11);
EAT monitor (9), this EAT monitor (9) are arranged on the pipeline that connects described thermoregulator (10) and fluid bed lathe bed (4);
Fluid bed differential pressure indicator (7) and temperature of charge and humidity detection instrument (8), this fluid bed differential pressure indicator (7) and temperature of charge and humidity detection instrument (8) are separately positioned on the described fluid bed lathe bed (4); And,
Switch board (1), this switch board (1) is connected with humidity detection instrument (8) circuit with described blower fan (2), wind speed detector, leaving air temp monitor (3), air conditioner unit (11), thermoregulator (10), EAT monitor (9), fluid bed differential pressure indicator (7) and temperature of charge respectively by cable.
2. the fluid bed automatic control system that is used for the solid pharmaceutical preparation drying as claimed in claim 1, it is characterized in that the fan frequency converter, blast regulator and the input/output module that be provided with control module in the described switch board (1), are connected respectively with described control module circuit.
3. the fluid bed automatic control system that is used for the solid pharmaceutical preparation drying as claimed in claim 2, it is characterized in that, described control module comprises main control module (12), and the air quantity control module (13), the fluidized-bed temperature control module (141) that are connected with described main control module (12) circuit respectively, trembles a bag control module (142), air conditioner unit control module (143) and the dry control module (15) that stops;
Described fluidized-bed temperature control module (141), tremble a bag control module (142) and air conditioner unit control module (143) is formed dry control module (14);
Described air quantity control module (13) is gone back circuit and is connected described fan frequency converter;
Described fluidized-bed temperature control module (141) is gone back circuit and is connected described thermoregulator (10);
The described bag control module (142) of trembling is gone back circuit and is connected to be arranged on and tremble bag system (5) on the described fluid bed lathe bed (4);
Described air conditioner unit control module (143) is gone back circuit and is connected described air conditioner unit (11);
The described dry control module (15) that stops is gone back circuit connection fluid bed.
4. control method that is used for the fluid bed automatic control system of solid pharmaceutical preparation drying is characterized in that the method includes the steps of:
Step 1 tentatively preestablishes technological parameter, and this technological parameter comprises: air quantity initial target value, terminal point determining mode and corresponding value, thermoregulator opening value, EAT, tremble bag and control a parameter;
Step 2 is according to the technological parameter of setting, and the fluid bed control system starts, and the control fluid bed carries out drying to material;
Step 3 is adjusted the real-time desired value of air quantity according to pressure difference in drying time and the detected fluid bed of fluid bed differential pressure indicator (7);
Step 4 main control module (12) carries out linearisation, normalization with the real-time desired value of fluid bed air quantity, air measuring value, temperature of charge, EAT and leaving air temp;
Step 5 main control module (12) adopts the PID method to adjust parameter, control blower fan (2) and thermoregulator (10);
The dry control module (15) that stops of step 6 judges whether the fluid bed operating state satisfies the terminal point determining value, if the dry run of then controlling fluid bed finishes, and if not, then proceeds drying, and jumps to step 3.
5. a kind of control method that is used for the fluid bed automatic control system of solid pharmaceutical preparation drying as claimed in claim 4 is characterized in that described step 5 also comprises following steps:
Step 5.1 main control module (12) adopts the PID method that real-time desired value of air quantity and air measuring value are revised, and air quantity control module (13) is adjusted the work of blower fan (2) according to the controlled quentity controlled variable of revised value adjustment fan frequency converter;
Step 5.2 main control module (12) adopts the PID method that temperature of charge, EAT and leaving air temp are revised, and fluidized-bed temperature control module (141) is regulated the fluid bed internal temperature according to the aperture of revised value adjustment thermoregulator (10).
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| CN109520240A (en) * | 2019-01-02 | 2019-03-26 | 川田机械制造(上海)有限公司 | Support the drying machine and its energy-saving drying method of realization power saving function |
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| CN105651003B (en) * | 2016-01-22 | 2018-10-19 | 青岛华仁太医药业有限公司 | A kind of fluidized drying technique of Pu Yuan and capsule for treating gastropathy particle |
| CN110360838A (en) * | 2018-04-13 | 2019-10-22 | 内蒙古中凯自动化技术有限公司 | Stability contorting product moisture content method for Air Dried System |
| CN110360838B (en) * | 2018-04-13 | 2020-10-27 | 内蒙古中凯自动化技术有限公司 | Method for stably controlling moisture content of product for pneumatic drying system |
| US11624557B2 (en) | 2018-07-02 | 2023-04-11 | Green Mountain Mechanical Design, Inc. | Vacuum drying kilns and control systems therefore |
| WO2020010094A3 (en) * | 2018-07-02 | 2020-03-26 | Green Mountain Mechanical Design, Inc. | Vacuum drying kilns and control systems therefore |
| CN109520240A (en) * | 2019-01-02 | 2019-03-26 | 川田机械制造(上海)有限公司 | Support the drying machine and its energy-saving drying method of realization power saving function |
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| CN116700158A (en) * | 2023-03-28 | 2023-09-05 | 哈尔滨葵花药业有限公司 | Fluidized bed granulator production process monitoring system and method for preparing mouth-soluble granules |
| CN116700158B (en) * | 2023-03-28 | 2024-01-09 | 哈尔滨葵花药业有限公司 | Fluidized bed granulator production process monitoring system and method for preparing mouth-soluble granules |
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