WO2023043149A1 - 분진량 예측 장치 및 방법 - Google Patents
분진량 예측 장치 및 방법 Download PDFInfo
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- WO2023043149A1 WO2023043149A1 PCT/KR2022/013635 KR2022013635W WO2023043149A1 WO 2023043149 A1 WO2023043149 A1 WO 2023043149A1 KR 2022013635 W KR2022013635 W KR 2022013635W WO 2023043149 A1 WO2023043149 A1 WO 2023043149A1
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- amount
- dust
- bpa
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- liquid
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- 239000000428 dust Substances 0.000 title claims abstract description 333
- 238000000034 method Methods 0.000 title claims abstract description 116
- 239000007788 liquid Substances 0.000 claims abstract description 160
- 230000008569 process Effects 0.000 claims abstract description 97
- 239000000843 powder Substances 0.000 claims description 45
- 238000004519 manufacturing process Methods 0.000 claims description 24
- 230000005611 electricity Effects 0.000 claims description 21
- 230000003068 static effect Effects 0.000 claims description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 20
- 239000001301 oxygen Substances 0.000 claims description 20
- 229910052760 oxygen Inorganic materials 0.000 claims description 20
- 239000003507 refrigerant Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 18
- 230000002159 abnormal effect Effects 0.000 claims description 16
- 238000001816 cooling Methods 0.000 description 19
- 238000007711 solidification Methods 0.000 description 18
- 230000008023 solidification Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 17
- 238000004880 explosion Methods 0.000 description 11
- 230000007704 transition Effects 0.000 description 10
- 239000002245 particle Substances 0.000 description 9
- 230000008901 benefit Effects 0.000 description 8
- 230000008014 freezing Effects 0.000 description 8
- 238000007710 freezing Methods 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229940106691 bisphenol a Drugs 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003442 weekly effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 150000002835 noble gases Chemical class 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
- B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
Definitions
- the present invention relates to an apparatus and method for predicting the amount of dust, and more particularly, to an apparatus and method for predicting the amount of dust generated in the manufacturing process of BPA prills.
- dust generated in the process of producing BPA (Bisphenol-A) prills through a prill tower may be stored in a dust filter.
- the dust filter may include a bag filter through which dust introduced from the prill tower is filtered and a dust box where dust is finally stored.
- the dust stored in the dust filter is a combustible material, and when more than a certain amount of dust is dispersed in a certain space, static electricity that can act as an ignition source may accumulate. That is, if oxygen, static electricity (ignition source), and dust (combustible material) are present in the bag filter at a certain level or higher, there is a risk that the bag filter may catch fire or explode. Therefore, it is important to detect the occurrence of an unexpected accident in advance by checking the amount of dust stored in the bag filter.
- the dust box of the dust filter is replaced at regular intervals, and the amount of dust stored in the dust box during the corresponding period is confirmed post fact.
- this conventional method has a problem in that the amount of dust stored in the dust filter cannot be checked in real time.
- a dust filter is provided with a sensor for detecting the amount of dust to check the amount of dust.
- this conventional method has a problem in that the manufacturing cost of the BPA prill production apparatus increases because a sensor for detecting the amount of dust is necessarily provided.
- the present invention has been made to solve the above problems, and an object of the present invention is to provide a dust amount prediction device and method for predicting the amount of dust generated in the production process of BPA frills in real time using a learned model.
- the dust amount prediction device is a dust amount prediction device for predicting the amount of dust generated during a process in which BPA prills are produced from liquid BPA flowing into a frill tower, using a learned differential amount prediction model, a differential amount prediction unit configured to predict a differential amount generated in the process from information on the flow rate of the liquid BPA flowing into the tower; and a dust amount prediction unit configured to predict the amount of dust generated in the process from the differential amount predicted by the differential amount prediction unit by using the learned dust amount prediction model.
- the differential amount prediction model may be pre-learned to predict the differential amount that can be generated from the liquid BPA based on the flow rate information of the liquid BPA flowing into the prill tower and a preset differential amount generation rate.
- the differential amount production ratio may be preset to indicate a correspondence between the amount of the liquid BPA and the differential amount generated from the liquid BPA.
- the differential amount prediction model may be pre-learned to predict the differential amount by further considering at least one of characteristic information of the liquid BPA flowing into the prill tower and process condition factors of the prill tower.
- the differential amount prediction unit may be configured to determine the differential amount production rate corresponding to at least one of the characteristic information of the liquid BPA and the process condition factor, and to predict the differential amount based on the determined differential amount production rate. .
- the characteristic information of the liquid BPA may include at least one of temperature information and composition information of the liquid BPA.
- the process condition factors include the speed at which the liquid BPA flowing into the prill tower is injected into the prill tower, the speed at which BPA prills and fines generated in the process are output from the prill tower to the outside, and in the process It may be configured to include at least one of an amount of refrigerant flowing into the prill tower, a temperature of the refrigerant, an internal temperature of the prill tower, and a pressure difference between a dust filter in which the dust is stored and the inside of the prill tower.
- the dust amount prediction model may be pre-learned to predict the amount of dust from the predicted differential amount based on a previously set correlation between the powder amount and the dust amount.
- the correlation may be configured to be set in advance based on a correspondence between the amount of powder and the amount of dust generated from the liquid BPA.
- the liquid BPA may be introduced into the prill tower during the process to generate the BPA prill, the fine powder, and the dust.
- An apparatus for predicting the amount of dust is configured to diagnose the state of the dust filter based on the amount of oxygen and the amount of static electricity of the dust filter in which the dust generated in the process is stored and the amount of dust predicted by the dust amount prediction unit. It may further include a risk level determining unit.
- the risk determining unit may be configured to determine a state of the dust filter as a normal state or an abnormal state, and output a warning notification when the determined state of the dust filter is the abnormal state.
- BPA prill manufacturing apparatus may include a dust amount predicting apparatus according to one aspect of the present invention.
- a dust prediction method is a dust amount prediction method for predicting the amount of dust generated during a process in which BPA prills are produced from liquid BPA flowing into a prill tower, using a learned differential amount prediction model, A differential amount prediction step of predicting a differential amount generated in the process from flow rate information and characteristic information of the liquid BPA flowing into the prill tower and process condition factors of the prill tower; and a dust amount prediction step of predicting the amount of dust generated in the process from the differential amount predicted in the differential amount prediction step by using the learned dust amount prediction model.
- the amount of dust generated in the BPA prill production process can be predicted in real time based on the learned model.
- FIG. 1 is a diagram schematically illustrating a BPA prill production apparatus for producing BPA prills from liquid BPA.
- FIG. 2 is a diagram schematically showing an apparatus for predicting the amount of dust according to an embodiment of the present invention.
- 3 is a diagram schematically showing the amount of fine powder and the amount of dust generated from liquid BPA.
- Figure 4 is a diagram schematically showing the operating configuration of the dust amount prediction device according to an embodiment of the present invention.
- FIG. 5 is a diagram schematically illustrating a phase transition process of liquid BPA in the BPA prill process.
- FIG. 6 is a diagram schematically illustrating a phase transition process of liquid BPA when the temperature of liquid BPA in FIG. 5 is changed.
- FIG. 7 is a view schematically illustrating a phase transition process of liquid BPA when the composition of liquid BPA in FIG. 5 is changed.
- FIG. 8 is a diagram schematically showing the amount of dust predicted by the dust amount prediction device according to an embodiment of the present invention.
- FIG. 9 is a diagram schematically illustrating a dust amount prediction method according to another embodiment of the present invention.
- FIG. 1 is a diagram schematically illustrating a BPA prill production apparatus for producing BPA prills from liquid BPA.
- liquid BPA (Bisphenol-A) is Molten BPA, and may be configured to flow into the prill tower 10 during the process to generate BPA prills, fine powder, and dust.
- the BPA prill generating device may include a prill tower (10) and a dust filter (20).
- the frill tower 10 may include a BPA inlet 11, a BPA outlet 12, a body 13, a refrigerant inlet 14, a BPA output 15 and a dust output 16. there is.
- the BPA inlet 11 may be configured to introduce liquid BPA.
- liquid BPA may flow into the prill tower 10 through the BPA inlet 11 .
- the BPA outlet 12 may be connected to the BPA inlet 11, and liquid BPA introduced through the BPA inlet 11 may be extracted.
- the BPA discharge unit 12 may include one or more holes through which liquid BPA may be discharged.
- the BPA discharge unit 12 rotates at a predetermined RPM and discharges the introduced liquid BPA into the main body unit 13 .
- the main body 13 may be configured such that the liquid BPA discharged from the BPA discharge unit 12 falls. Specifically, the discharged liquid BPA may be cooled while falling from the upper side of the main body 13 to the lower side.
- One or more refrigerant inlets 14 may be provided in the main body 13 so that the external refrigerant flows into the main body 13 .
- the refrigerant is a cooling gas capable of lowering the temperature of liquid BPA, and for example, air, nitrogen, noble gases, or a combination thereof may be applied.
- BPA prills can be formed from liquid BPA.
- fine powder and dust may be generated due to collisions between the formed BPA frills and the inside of the frill tower 10 or collisions between the BPA frills.
- BPA prills, fine powder, and dust can be classified according to the particle size. More specifically, BPA prills, fines and dust can be classified according to the particle size preset for each.
- the dust filter 20 through the dust output unit 16 can be introduced into
- the dust output unit 16 It does not flow into, and can be accumulated on the lower side of the body portion (13). That is, BPA prills and fine powder generated from liquid BPA may be located on the lower side of the body portion 13 .
- the BPA output unit 15 is provided on the lower side of the body portion 13, and the BPA output unit 15 may be configured to output the BPA frill and the differential powder located on the lower side of the body portion 13 to the outside.
- the BPA output unit 15 may be configured as a conveyor capable of outputting BPA frills and powder to the outside.
- the dust output unit 16 may be provided on the upper side of the body unit 13 and may be configured to connect the inside of the body unit 13 and the dust filter 20 . Dust generated inside the main body 13 may flow into the dust filter 20 through the dust output unit 16 .
- dust may be output to the outside of the frill tower 10 through the BPA output unit 15, but hereinafter, the dust will be described as flowing into the dust filter 20 through the dust output unit 16. do.
- dust may be generated in the process of solidifying liquid BPA discharged from the BPA discharge unit 12 .
- dust may be generated while the generated BPA frills and/or fine particles collide with the lower side of the body portion 13 .
- dust may be generated by colliding with each other in the process of outputting BPA frills and/or fine powder accumulated on the lower side of the body part 13 to the outside through the BPA output part 15.
- the dust generated inside the main body 13 is generated by the refrigerant introduced through the refrigerant inlet 14 and/or the internal pressure difference between the main body 13 and the dust filter 20. ) It can flow into the dust filter 20 through.
- the dust filter 20 may include a bag filter 21 and a dust box 22.
- the bag filter 21 may be configured such that dust passing through the dust output unit 16 is introduced.
- a sensing unit 23 for measuring the amount of oxygen and the amount of static electricity inside the bag filter 21 may be provided.
- the dust box 22 may be configured to accumulate dust introduced into the bag filter 21 .
- the dust box 22 may be configured to be detachable from the bag filter 21 . Therefore, when dust accumulates in the dust box 22 at a predetermined rate or more, the dust box 22 attached to the bag filter 21 is recovered, and a new dust box 22 or a cleaned dust box 22 is returned to the bag. It can be re-mounted on the builder (21).
- Figure 2 is a diagram schematically showing the dust amount prediction device 100 according to an embodiment of the present invention.
- the dust amount prediction device 100 may be configured to predict the amount of dust generated during a process of producing BPA prills from liquid BPA flowing into the prill tower 10 .
- the dust amount prediction device 100 may predict the amount of dust generated from liquid BPA flowing into the prill tower 10 . Specifically, the dust amount prediction device 100 may predict the amount of dust flowing from the prill tower 10 to the bag filter 21 .
- the dust amount prediction device 100 may include a differential amount prediction unit 110 and a dust amount prediction unit 120 .
- the differential amount predictor 110 may be configured to predict the differential amount generated in the process from flow information of the liquid BPA flowing into the prill tower 10 using the learned differential amount prediction model.
- information on the flow rate of liquid BPA may be information on the flow rate of liquid BPA introduced into the main body 13 from the outside through the BPA inlet 11 .
- the differential amount prediction model may be pre-learned to predict the differential amount that can be produced from the liquid BPA based on the flow rate information of the liquid BPA flowing into the prill tower 10 under process conditions and the differential amount generation ratio set in advance.
- the differential amount production ratio may be preset to indicate a correspondence between the amount of liquid BPA and the differential amount generated from the liquid BPA.
- the size of particles generated in the BPA prill process may be 0.15 mm or less, greater than 0.15 mm and less than or equal to 0.5 mm, greater than 0.5 mm and less than or equal to 0.85 mm, greater than 0.85 mm and less than or equal to 2 mm, or greater than 2 mm.
- the particle size is 0.15 mm or less, it is classified as fine powder, and the rest can be classified as BPA prills.
- the differential amount production rate may be set in advance as a ratio of the amount of the fine powder to the total amount of liquid BPA introduced into the prill tower 10 in the course of the experiment. Then, based on the differential amount generation rate, the differential amount prediction model can be learned to output the differential amount (differential amount) that can be generated when information on the amount of liquid BPA is input. Accordingly, the differential amount predictor 110 may predict the differential amount corresponding to the flow rate information of the liquid BPA currently flowing into the prill tower 10 by using the learned differential amount prediction model.
- the dust amount prediction unit 120 may be communicatively connected to the differential amount prediction unit 110 .
- the dust amount prediction unit 120 may be configured to predict the amount of dust generated in the process from the differential amount predicted by the differential amount prediction unit 110 using the learned dust amount prediction model.
- the dust amount prediction model may be pre-learned to predict the amount of dust from the predicted amount of dust based on a previously set correlation between the amount of fine powder and the amount of dust.
- the preset correlation between the amount of fine powder and the amount of dust may be preset based on the correspondence between the amount of fine powder and the amount of dust generated from liquid BPA.
- the correlation between the amount of powder and the amount of dust may be a value previously set through an experiment. Specifically, the amount of fine powder and the amount of dust generated at each predetermined period may be obtained, and a correlation between the amount of fine powder and the amount of dust may be established based on the amount of fine powder and the amount of dust obtained at each period. That is, the dust amount prediction unit 120 predicts what will be generated in the process from the differential amount predicted to be generated in the process by the differential amount predictor 110 based on the correlation between the preset amount of fine powder and the amount of dust. amount of dust can be calculated.
- 3 is a diagram schematically showing the amount of fine powder and the amount of dust generated from liquid BPA.
- the embodiment of FIG. 3 may be experimental data obtained by measuring the total amount of powder generation and the total amount of dust generation every week.
- the total amount of differential generation is a value obtained by measuring the differential amount generated from liquid BPA through the prill tower 10 at weekly intervals.
- the total amount of dust generated is a value obtained by measuring the amount of dust stored in the dust box 22 at weekly intervals.
- the total amount of differential generation and the total amount of dust generation measured in the same week may be mapped to each other and displayed as respective points ( ⁇ ) in FIG. 3 .
- the correlation between the amount of fine powder and the amount of dust may be set as a ratio of the amount of generated dust to the amount of fine powder.
- it may be set based on the ratio of the total amount of dust generation to the total amount of differential generation.
- a maximum ratio or an average ratio of the total amount of dust generation to the total amount of fine dust generation may be set as a correlation.
- the correlation between the amount of fine powder and the amount of dust may be set as the maximum ratio of the total amount of dust to the total amount of fine powder.
- the correlation between the amount of fine powder and the amount of dust may be set as a correlation coefficient between the amount of fine powder and the amount of dust.
- the correlation coefficient may be calculated through the covariance of the total amount of differential generation and the total amount of dust generation. Specifically, when X is set to the total amount of differential generation and Y is set to the total amount of dust generation, the corresponding relationship between the total amount of differential generation and the total amount of dust generation is X-Y as in the embodiment of FIG. 3. It can be expressed as a graph.
- a correlation coefficient may be calculated based on the variance between the total amounts of differential generation, the variance between the total amounts of dust generation, and the covariance between the total amount of differential generation and the total amount of dust generation.
- a correlation coefficient between the total amount of fine dust generation and the total amount of dust generation may be 0.56.
- the correlation between the amount of fine powder and the amount of dust may be preset based on the amount of fine powder and the amount of dust generated in the course of the experiment. And, based on this correlation, the dust amount prediction model can be learned to predict the amount of dust (amount of dust) that can be generated when information on the differential amount is input. Therefore, the dust amount prediction unit 120 may predict the amount of dust expected to be generated in the process from the differential amount predicted by the differential amount prediction unit 110 using the learned dust amount prediction model.
- the dust amount predicting device 100 can predict the amount of dust generated during the BPA prill process even without an additional sensor for measuring the amount of dust.
- the dust amount prediction device 100 may predict the amount of dust generated during the BPA prill process in real time without measuring the amount of dust stored in the dust filter 20 ex post facto. Therefore, the dust amount prediction device 100 has the advantage of being able to detect in advance a dangerous situation in which a fire or explosion occurs in the bag filter 21 by estimating the amount of dust in real time.
- Figure 4 is a diagram schematically showing the operating configuration of the dust amount prediction device 100 according to an embodiment of the present invention.
- the differential amount prediction model may be pre-learned to predict the differential amount by further considering at least one of the characteristic information of the liquid BPA flowing into the prill tower 10 and the process condition factor of the prill tower 10 .
- the differential amount prediction model may be learned by further considering at least one of the flow rate information of the liquid BPA, the characteristic information of the liquid BPA, and the process condition factor of the prill tower 10 .
- the property information of the liquid BPA may be configured to include at least one of temperature information and composition information of the liquid BPA.
- the process condition factors include the speed at which the liquid BPA flowing into the frill tower 10 is injected into the frill tower 10, the BPA frill and fine powder generated in the process, and the output from the frill tower 10 to the outside.
- the speed the amount of refrigerant flowing into the prill tower 10 in the process, the temperature of the refrigerant, the internal temperature of the prill tower 10, and the pressure difference between the dust filter 20 and the prill tower 10 in which dust is stored. It may be configured to include at least one.
- the differential amount prediction unit 110 may determine a differential amount generation rate corresponding to at least one of the characteristic information of the liquid BPA and the process condition factor of the prill tower 10 .
- the differential amount prediction unit 110 may determine a corresponding differential amount generation rate by considering both the characteristic information of the liquid BPA and the process condition factors of the prill tower 10 .
- a plurality of differential amount production ratios may be set to correspond to the characteristic information of liquid BPA and the process condition factor of the prill tower 10, and the differential amount prediction unit 110 determines one of the plurality of differential amount production ratios.
- the differential amount predictor 110 may predict the differential amount from information on the flow rate of liquid BPA flowing into the prill tower 10 using the differential amount learning model to which the determined differential amount generation rate is applied.
- flow rate information IN1 of liquid BPA, characteristic information IN2 of liquid BPA, and process condition factor IN3 may be input to the differential amount predictor 110 .
- the differential amount prediction unit 110 may input the flow rate information (IN1) of liquid BPA, the characteristic information (IN2) of liquid BPA, and the process condition factor (IN3) into the differential amount prediction model. Also, the differential amount prediction unit 110 may output the result output from the differential amount prediction model as differential amount information OUT1 predicted to be generated in the process.
- differential amount information output from the differential amount predictor 110 may be input to the dust amount predictor 120 .
- the dust amount predicting unit 120 receives the differential amount information OUT1 output from the differential amount predicting unit 110, and the difference between the received differential amount information OUT1 and the preset differential amount and the dust amount is The correlation (IN4) can be input into the dust quantity prediction model.
- the dust amount prediction unit 120 may output a result output from the dust amount prediction model as dust amount information OUT2 predicted to be generated in a process.
- the dust amount prediction device 100 is based on at least one of the flow rate, temperature, and composition information of the liquid BPA flowing into the frill tower 10 and the operating condition factor of the frill tower 10 , it has the advantage of being able to predict in real time the amount of dust expected to be generated during the BPA prill process.
- FIG. 5 is a diagram schematically illustrating a phase transition process of liquid BPA in the BPA prill process. Specifically, the embodiment of FIG. 5 illustrates a standard process by which solid BPA (BPA prills, powders and dust) is produced from liquid BPA.
- solid BPA BPA prills, powders and dust
- liquid BPA at a temperature of T1 may be discharged from the BPA discharge unit 12 at time t0.
- Times t0 to t1 may be a liquid cooling period.
- the liquid BPA may be cooled by a temperature difference between the inside of the body portion 13 and a temperature difference between the refrigerant introduced into the body portion 13 through the refrigerant inlet 14 .
- the temperature of the cooled liquid BPA at time t1 may be T0.
- Time t1 to t2 may be a solidification period.
- the cooled liquid BPA may be solidified. That is, the temperature T0 may be the freezing point of liquid BPA.
- a phase transition occurs in the liquid BPA cooled to a temperature T0 through the liquid cooling section, and the liquid BPA may be solidified in the solidification section.
- BPA prills, fine powder, and dust may be generated from liquid BPA in the solidification section.
- time t2 may be a solid cooling period.
- Solid BPA produced through the solidification section may be cooled in the solid cooling section.
- FIG. 6 is a diagram schematically illustrating a phase transition process of liquid BPA when the temperature of liquid BPA is changed in the embodiment of FIG. 5 .
- FIG. 6 is a view schematically illustrating a phase transition process of liquid BPA when the temperature of the liquid BPA flowing into the prill tower 10 is T2 greater than T1. That is, the embodiment of FIG. 6 is an embodiment for the case where the temperature of liquid BPA is increased.
- the length of the liquid cooling section may be longer than that of the liquid cooling section of FIG. 5 .
- the solidification period may be from t1_chg to t2 time. That is, the solidification period of the embodiment of FIG. 6 may be reduced by "t1_chg - t1" compared to the solidification period of the embodiment of FIG. 5 .
- the solidification time of the liquid BPA may decrease as the temperature of the liquid BPA increases.
- solid BPA particles produced in the embodiment of FIG. 6 may be smaller than particles of solid BPA produced in the embodiment of FIG. 5 . This means that in the embodiment of FIG. 6 , a greater amount of fine powder can be generated compared to the embodiment of FIG. 5 .
- the differential amount prediction unit 110 considers the temperature of the liquid BPA to predict the differential amount to be produced.
- FIG. 7 is a view schematically illustrating a phase transition process of liquid BPA when the composition of liquid BPA in FIG. 5 is changed. Specifically, FIG. 7 is a view schematically illustrating a phase transition process of liquid BPA when the composition of liquid BPA flowing into the prill tower 10 is different from the composition of liquid BPA according to the embodiment of FIG. 5 . That is, the embodiment of FIG. 7 is an embodiment for a case in which the composition of liquid BPA among the process condition factors is changed.
- the length of the liquid cooling section may be longer than that of FIG. 5 .
- the temperature of the liquid BPA may reach the freezing point at the time t1_chg. That is, since the freezing point of the mixture is lower than that of the pure substance, the freezing point of the liquid BPA of FIG. 7 may be lower than the freezing point of the liquid BPA of FIG. 5 . And, since the cooling rates in FIG. 5 and FIG. 7 are the same, the freezing point of the liquid BPA in FIG. 7 can be lowered to T3.
- the solidification period may be from t1_chg to t2 time. That is, the solidification period of the embodiment of FIG. 7 may be reduced by "t1_chg - t1" compared to the solidification period of the embodiment of FIG. 5 .
- the solidification time of the liquid BPA may be reduced as the composition of the liquid BPA is changed.
- the particles of solid BPA produced in the embodiment of FIG. 7 may be smaller than the particles of solid BPA produced in the embodiment of FIG. 5 . This means that in the embodiment of FIG. 7 , a greater amount of fine particles can be generated compared to the embodiment of FIG. 5 .
- the powder amount prediction unit 110 can predict the amount of fine powder to be produced by considering the composition of liquid BPA. there is.
- the cooling rate of the liquid BPA may be changed.
- the cooling rate of the liquid BPA in the liquid cooling section may be changed. Changes in cooling rate can affect the time it takes liquid BPA to reach its freezing point, as well as affect its solidification mechanism.
- the differential amount prediction unit 110 may predict the differential amount by further considering the temperature of the liquid BPA and the process condition factor of the prill tower 10 .
- FIG. 8 is a diagram schematically showing the amount of dust predicted by the dust amount prediction device 100 according to an embodiment of the present invention.
- FIG. 8 is a diagram showing the comparison between the amount of dust actually generated ( ⁇ ) and the predicted amount of dust ( ⁇ ) for a predetermined period (13 months) by the dust amount prediction unit 120 .
- the dust amount predictor 120 may predict the amount of dust generated from liquid BPA by considering the differential amount information received from the differential amount predictor 110 and the correlation between the differential amount and the dust amount. Therefore, referring to FIG. 8 , it can be seen that the amount of dust predicted by the dust amount prediction unit 120 is similar to the actually generated amount of dust.
- the dust amount prediction unit 120 can predict the amount of dust generated during the BPA prill process with high accuracy from the predicted fine powder amount.
- the differential amount prediction unit 110, the dust amount prediction unit 120, and the risk level determining unit 130 provided in the dust amount prediction device 100 are processors known in the art to execute various control logics performed in the present invention.
- ASICs application-specific integrated circuits
- other chipsets logic circuits, registers, communication modems, data processing devices, and the like may optionally be included.
- the dust amount prediction device 100 may further include a storage unit 140 .
- the storage unit 140 may store data required for each component of the dust amount prediction device 100 to perform operations and functions, or data generated in the process of performing programs or operations and functions.
- the type of the storage unit 140 is not particularly limited as long as it is known information storage means capable of writing, erasing, updating, and reading data.
- the information storage means may include RAM, flash memory, ROM, EEPROM, registers, and the like.
- the storage unit 140 may store program codes in which processes executable by the differential amount prediction unit 110 , the dust amount prediction unit 120 and the risk level determination unit 130 are defined.
- the storage unit 140 may store a differential amount prediction model, a differential amount generation rate, a dust amount prediction model, and a correlation between the amount of dust and the differential amount.
- the dust amount prediction device 100 may further include a risk level determining unit 130 .
- the risk determining unit 130 diagnoses the state of the dust filter 20 based on the amount of oxygen and static electricity of the dust filter 20 in which dust generated in the process is stored and the amount of dust predicted by the dust amount prediction unit 120. can be configured to
- the risk level determination unit 130 may be communicatively connected to the sensing unit 23 . And, the risk level determination unit 130 may be connected to enable communication with the dust amount prediction unit 120.
- the risk determination unit 130 determines the amount of oxygen and static electricity IN5 of the bag filter 21 received from the sensing unit 23 and the amount of dust information OUT2 received from the dust amount prediction unit 120. Based on the condition of the dust filter 20 can be diagnosed.
- the risk determining unit 130 may determine the state of the dust filter 20 as a normal state or an abnormal state.
- the normal state may mean a state in which the amount of oxygen, the amount of static electricity, and the amount of dust are included in normal ranges, and there is no risk of fire or explosion in the dust filter 20 .
- the abnormal state may mean a state in which at least one of the amount of oxygen, the amount of static electricity, and the amount of dust is not included in a normal range.
- the abnormal state may include a warning state and a dangerous state.
- the warning state may mean a state in which at least one of the amount of oxygen, the amount of static electricity, and the amount of dust is out of a normal range, but the possibility of fire or explosion in the dust filter 20 is low. That is, the warning state is a state in which at least one of the amount of oxygen, the amount of static electricity, and the amount of dust is slightly out of the normal range, and the dust filter 20 may not be in a normal state, but the risk of fire or explosion may be low.
- the dangerous state may mean a state in which at least one of the amount of oxygen, the amount of static electricity, and the amount of dust is out of a normal range, and there is a possibility of fire or explosion in the dust filter 20 . That is, the dangerous state may be a state in which the dust filter 20 is not in a normal state and has a high risk of fire or explosion.
- a normal range, a warning range, and a danger range may be preset for each of the oxygen amount, static electricity amount, and dust amount.
- the risk determining unit 130 may determine the state of the dust filter 20 as a normal state.
- the risk level determining unit 130 may determine the state of the dust filter 20 as an abnormal state (specifically, a warning state).
- the risk level determining unit 130 may determine the state of the dust filter 20 as an abnormal state (specifically, a dangerous state). .
- the abnormal state is divided into only the warning state and the dangerous state, but the abnormal state may be further subdivided according to the possibility of fire or explosion occurring in the dust filter 20 . That is, the state range corresponding to the amount of oxygen, the amount of static electricity, and the amount of dust may be further subdivided in addition to the normal state, the warning state, and the dangerous state.
- the risk determination unit 130 may be configured to output a warning notification when the determined state of the dust filter 20 is in an abnormal state.
- the risk level determining unit 130 may output a warning notification along with the determined state of the dust filter 20 to an external display, a user terminal, and/or a central control server.
- the user and/or server may temporarily stop the BPA frill process according to the warning notification received from the risk level determination unit 130 in order to prevent fire and/or explosion from occurring in the dust filter 20.
- the state of the dust filter 20 determined by the risk level determination unit 130 is an abnormal state (particularly, a dangerous state)
- the BPA prill process may be temporarily stopped.
- the dust amount prediction device 100 can predict the amount of dust generated in the BPA prill process in real time. Therefore, the dust amount prediction device 100 has the advantage of being able to prevent unexpected accidents such as fire and / or explosion from occurring in the process of BPA frills, or to quickly inform the outside of the occurrence of such accidents. .
- the dust amount prediction device 100 may be included in the BPA prill manufacturing device.
- the BPA prill manufacturing apparatus may include a prill tower 10, a dust filter 20, and a dust amount prediction device 100.
- the dust amount prediction device 100 includes flow rate information (IN1) of liquid BPA introduced through the BPA inlet 11, characteristic information (IN2) of liquid BPA, and process conditions of the prill tower 10.
- the factor (IN3) can be input from the outside.
- the dust amount prediction device 100 is communicatively connected to the sensing unit 23 provided in the bag filter 21, and may receive the amount of oxygen and the amount of static electricity IN5 from the sensing unit 23.
- the dust amount prediction device 100 may predict the amount of dust included in the bag filter 21 in real time in the process of producing BPA prills by the BPA frill manufacturing device. Therefore, since the BPA prill manufacturing apparatus can check the possibility of fire and/or explosion of the dust filter 20 in real time, there is an advantage in that BPA prills can be produced more safely.
- FIG. 9 is a diagram schematically illustrating a dust amount prediction method according to another embodiment of the present invention.
- each step of the method for predicting the amount of dust may be performed by the device 100 for predicting the amount of dust.
- the device 100 for predicting the amount of dust may be performed by the device 100 for predicting the amount of dust.
- the dust amount prediction method is a method of predicting the amount of dust generated during a process in which BPA prills are produced from liquid BPA flowing into the prill tower 10 .
- the dust amount prediction method may include a differential amount prediction step (S100) and a dust amount prediction step (S200).
- the differential amount prediction step (S100) is a step of predicting the differential amount generated in the process from the flow rate information of the liquid BPA flowing into the frill tower 10 using the learned differential amount prediction model, and the differential amount prediction unit ( 110) can be performed.
- the differential amount prediction unit 110 may predict the differential amount expected to be generated from information on the flow rate of liquid BPA flowing into the prill tower 10 in real time.
- the differential amount prediction unit 110 may generate differential amount information from flow rate information (IN1) of liquid BPA, characteristic information (IN2) of liquid BPA, and process condition factor (IN3).
- the dust amount prediction step (S200) is a step of predicting the amount of dust generated in the process from the differential amount predicted in the differential amount prediction step (S100) using the learned dust amount prediction model, and is performed by the dust amount prediction unit 120. It can be.
- the dust amount prediction unit 120 may receive the differential amount information OUT1 from the differential amount prediction unit 110 . Also, the dust amount prediction unit 120 may predict the amount of dust that may be generated during the BPA prill process based on the preset correlation IN4 and the differential amount information OUT1.
- the method for predicting the amount of dust according to another embodiment of the present invention has the advantage of being able to predict in real time the amount of dust that may be generated during the BPA prill process through a non-destructive method.
- the dust amount prediction method may further include a risk determining step (S300).
- the state of the dust filter 20 is diagnosed based on the amount of oxygen and static electricity of the dust filter 20 in which dust generated in the process is stored and the amount of dust predicted by the dust amount prediction unit 120. As a step of doing, it may be performed by the risk determination unit 130.
- the risk level determination unit 130 may receive the dust amount information OUT2 from the dust amount prediction unit 120 . Also, the risk level determining unit 130 may receive the amount of oxygen and the amount of static electricity IN5 from the sensing unit 23 provided in the dust filter 20 (specifically, the bag filter 21).
- the risk determining unit 130 may determine the state of the dust filter 20 as a normal state or an abnormal state based on the amount of oxygen, the amount of static electricity, and the amount of dust. If the state of the dust filter 20 is determined to be an abnormal state, the risk level determining unit 130 may be configured to output a warning notification to the outside.
- the method for predicting the amount of dust prevents accidents such as fire and/or explosion that may occur in the dust filter 20 by outputting a warning notification to the outside when the dust filter 20 is in an abnormal state. It is possible to prevent the occurrence of such an accident in advance or promptly inform the outside of the occurrence of such an accident.
- the embodiments of the present invention described above are not implemented only through devices and methods, and may be implemented through a program that realizes functions corresponding to the configuration of the embodiments of the present invention or a recording medium on which the program is recorded. Implementation can be easily implemented by an expert in the technical field to which the present invention belongs based on the description of the above-described embodiment.
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Abstract
Description
Claims (14)
- 프릴 타워로 유입되는 액상 BPA로부터 BPA 프릴이 생성되는 공정 과정에서 생성되는 분진량을 예측하는 분진량 예측 장치에 있어서,학습된 미분량 예측 모델을 이용하여, 상기 프릴 타워로 유입되는 상기 액상 BPA의 유량 정보로부터 상기 공정 과정에서 생성되는 미분량을 예측하도록 구성된 미분량 예측부; 및학습된 분진량 예측 모델을 이용하여, 상기 미분량 예측부에 의해 예측된 미분량으로부터 상기 공정 과정에서 생성되는 분진량을 예측하도록 구성된 분진량 예측부를 포함하는 것을 특징으로 하는 분진량 예측 장치.
- 제1항에 있어서,상기 미분량 예측 모델은,상기 프릴 타워로 유입되는 상기 액상 BPA의 유량 정보와 미리 설정된 미분량 생성 비율에 기반하여, 상기 액상 BPA로부터 생성될 수 있는 상기 미분량을 예측하도록 미리 학습된 것을 특징으로 하는 분진량 예측 장치.
- 제2항에 있어서,상기 미분량 생성 비율은,상기 액상 BPA의 양과 상기 액상 BPA로부터 생성된 미분량 간의 대응 관계를 나타내도록 미리 설정된 것을 특징으로 하는 분진량 예측 장치.
- 제2항에 있어서,상기 미분량 예측 모델은,상기 프릴 타워로 유입되는 상기 액상 BPA의 특성 정보 및 상기 프릴 타워의 공정 조건 인자 중 적어도 하나를 더 고려하여, 상기 미분량을 예측하도록 미리 학습된 것을 특징으로 하는 분진량 예측 장치.
- 제4항에 있어서,상기 미분량 예측부는,상기 액상 BPA의 특성 정보 및 상기 공정 조건 인자 중 적어도 하나에 대응되는 상기 미분량 생성 비율을 결정하고, 결정된 미분량 생성 비율에 기반하여 상기 미분량을 예측하도록 구성된 것을 특징으로 하는 분진량 예측 장치.
- 제4항에 있어서,상기 액상 BPA의 특성 정보는,상기 액상 BPA의 온도 정보 및 조성 정보 중 적어도 하나를 포함하도록 구성된 것을 특징으로 하는 분진량 예측 장치.
- 제4항에 있어서,상기 공정 조건 인자는,상기 프릴 타워로 유입되는 액상 BPA가 상기 프릴 타워의 내부로 분사되는 속도, 상기 공정 과정에서 생성된 BPA 프릴과 미분이 상기 프릴 타워로부터 외부로 출력되는 속도, 상기 공정 과정에서 상기 프릴 타워로 유입되는 냉매의 양, 상기 냉매의 온도, 상기 프릴 타워의 내부 온도 및 상기 분진이 저장되는 분진 필터와 상기 프릴 타워 내부의 압력차 중 적어도 하나를 포함하도록 구성된 것을 특징으로 하는 분진량 예측 장치.
- 제1항에 있어서,상기 분진량 예측 모델은,상기 미분량과 상기 분진량에 대해 미리 설정된 상관 관계에 기반하여, 상기 예측된 미분량으로부터 상기 분진량을 예측하도록 미리 학습된 것을 특징으로 하는 분진량 예측 장치.
- 제8항에 있어서,상기 상관 관계는,상기 액상 BPA로부터 생성된 미분량과 분진량 간의 대응 관계에 기반하여 미리 설정되도록 구성된 것을 특징으로 하는 분진량 예측 장치.
- 제1항에 있어서,상기 액상 BPA는,상기 공정 과정에서 상기 프릴 타워로 유입되어 상기 BPA 프릴, 상기 미분 및 상기 분진을 생성하도록 구성된 것을 특징으로 하는 분진량 예측 장치.
- 제1항에 있어서,상기 공정 과정에서 생성되는 분진이 저장되는 분진 필터의 산소량 및 정전기량과 상기 분진량 예측부에 의해 예측된 분진량에 기반하여 상기 분진 필터의 상태를 진단하도록 구성된 위험도 결정부를 더 포함하는 것을 특징으로 하는 분진량 예측 장치.
- 제11항에 있어서,상기 위험도 결정부는,상기 분진 필터의 상태를 정상 상태 또는 이상 상태로 결정하고, 상기 결정된 분진 필터의 상태가 상기 이상 상태인 경우, 경고 알림을 출력하도록 구성된 것을 특징으로 하는 분진량 예측 장치.
- 제1항 내지 제12항 중 어느 한 항에 따른 분진량 예측 장치를 포함하는 것을 특징으로 하는 BPA 프릴 제조 장치.
- 프릴 타워로 유입되는 액상 BPA로부터 BPA 프릴이 생성되는 공정 과정에서 생성되는 분진량을 예측하는 분진량 예측 방법에 있어서,학습된 미분량 예측 모델을 이용하여, 상기 프릴 타워로 유입되는 상기 액상 BPA의 유량 정보 및 특성 정보와 상기 프릴 타워의 공정 조건 인자로부터 상기 공정 과정에서 생성되는 미분량을 예측하는 미분량 예측 단계; 및학습된 분진량 예측 모델을 이용하여, 상기 미분량 예측 단계에서 예측된 미분량으로부터 상기 공정 과정에서 생성되는 분진량을 예측하는 분진량 예측 단계를 포함하는 것을 특징으로 하는 분진량 예측 방법.
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EP22870233.8A EP4258270A1 (en) | 2021-09-15 | 2022-09-13 | Apparatus and method for predicting amount of dust |
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