CN116757122B - Method, device, equipment and storage medium for constructing simulation model of packing absorption tower - Google Patents
Method, device, equipment and storage medium for constructing simulation model of packing absorption tower Download PDFInfo
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 197
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- 238000004088 simulation Methods 0.000 title claims abstract description 33
- 238000012856 packing Methods 0.000 title claims description 69
- 239000000945 filler Substances 0.000 claims abstract description 175
- 239000007788 liquid Substances 0.000 claims abstract description 126
- 238000010276 construction Methods 0.000 claims abstract description 17
- 239000006096 absorbing agent Substances 0.000 claims description 28
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Abstract
The invention discloses a simulation model construction method, device and equipment of a filler absorption tower and a storage medium. The method comprises the following steps: acquiring preset filler absorption tower configuration information, wherein the filler absorption tower configuration information comprises filler absorption tower parameter information and filler absorption tower feeding information; determining the tower outlet pressure of the filler absorption tower according to the configuration information of the filler absorption tower, wherein the tower outlet pressure comprises tower outlet gas pressure and tower outlet liquid pressure; and determining tower outlet gas related information and tower outlet liquid related information of the filler absorption tower according to the tower outlet pressure. By the technical scheme provided by the embodiment of the invention, the problem of low calculation time delay or precision in the existing model calculation is solved, and the associated information of the filler absorption tower can be rapidly and accurately calculated so as to accurately construct the filler absorption tower model.
Description
Technical Field
The present invention relates to the field of data processing technologies, and in particular, to a method, an apparatus, a device, and a storage medium for constructing a simulation model of a packing absorption tower.
Background
Absorption is the operation of contacting a gas mixture with an appropriate liquid in which one or more components of the gas dissolve, and the insoluble components remain in the gas phase, thereby utilizing the difference in solubility of the components in the liquid to separate the different components of the gas.
In chemical processes, absorption operations are often used to achieve processes for the production of chemical products, the separation of gas mixtures, and the recovery of useful components from gases. The mass transfer direction of the absorption process is the transfer of the species from the gas phase into the liquid phase, and the reverse process is the desorption operation, with the opposite mass transfer direction. In practice, the absorption operation and the desorption operation are often coupled together, that is, the liquid absorbs the gas and the components in the liquid volatilize into the gas at the same time.
In order to ensure sufficient contact between gas and liquid phases in the absorption process in industry to realize substance transfer, absorption operations are often performed in packed absorption columns. The packed absorber needs to be able to perform calculations of simultaneous absorption and desorption operations.
There are few high-precision mechanism models available for dynamic simulation systems that are specific to a packed absorber. While some existing simple model calculations have problems of low calculation delay or accuracy.
Disclosure of Invention
The invention provides a method, a device, equipment and a storage medium for constructing a simulation model of a filler absorption tower, which are used for solving the problems of low calculation time delay or low precision in the existing model calculation.
According to an aspect of the present invention, there is provided a simulation model construction method of a packing absorption tower, including:
acquiring preset filler absorption tower configuration information, wherein the filler absorption tower configuration information comprises filler absorption tower parameter information and filler absorption tower feeding information;
determining the tower outlet pressure of the filler absorption tower according to the configuration information of the filler absorption tower, wherein the tower outlet pressure comprises tower outlet gas pressure and tower outlet liquid pressure;
and determining tower outlet gas related information and tower outlet liquid related information of the filler absorption tower according to the tower outlet pressure.
According to another aspect of the present invention, there is provided a simulation model construction apparatus of a packed absorption tower, comprising:
the system comprises a configuration information acquisition module, a storage module and a storage module, wherein the configuration information acquisition module is used for acquiring preset configuration information of a filler absorption tower, and the configuration information of the filler absorption tower comprises parameter information of the filler absorption tower and feeding information of the filler absorption tower;
the tower outlet pressure determining module is used for determining the tower outlet pressure of the filler absorption tower according to the filler absorption tower configuration information, wherein the tower outlet pressure comprises tower outlet gas pressure and tower outlet liquid pressure;
And the associated information determining module is used for determining tower outlet gas associated information and tower outlet liquid associated information of the filler absorption tower according to the tower outlet pressure.
According to another aspect of the present invention, there is provided an electronic apparatus including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of constructing a simulation model of a packed absorber according to any one of the embodiments of the invention.
According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions for causing a processor to execute the simulation model construction method of the packing absorber according to any one of the embodiments of the present invention.
The simulation model construction scheme of the filler absorption tower provided by the embodiment of the invention comprises the following steps: acquiring preset filler absorption tower configuration information, wherein the filler absorption tower configuration information comprises filler absorption tower parameter information and filler absorption tower feeding information; determining the tower outlet pressure of the filler absorption tower according to the configuration information of the filler absorption tower, wherein the tower outlet pressure comprises tower outlet gas pressure and tower outlet liquid pressure; and determining tower outlet gas related information and tower outlet liquid related information of the filler absorption tower according to the tower outlet pressure. By the technical scheme provided by the embodiment of the invention, the problem of low calculation time delay or precision in the existing model calculation is solved, and the associated information of the filler absorption tower can be rapidly and accurately calculated so as to accurately construct the filler absorption tower model.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a simulation model construction method of a packing absorption tower according to a first embodiment of the present invention;
FIG. 2 is a schematic structural view of a packed absorber according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a simulation model construction apparatus of a packing absorption tower according to a fourth embodiment of the present invention;
fig. 4 is a schematic structural view of an electronic device implementing a simulation model construction method of a packed absorption tower according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 1 is a flowchart of a method for constructing a simulation model of a packing absorption tower according to an embodiment of the present invention, where the method may be performed by a simulation model constructing apparatus of a packing absorption tower, the simulation model constructing apparatus of a packing absorption tower may be implemented in hardware and/or software, and the simulation model constructing apparatus of a packing absorption tower may be configured in an electronic device. As shown in fig. 1, the method includes:
S110, acquiring preset filler absorption tower configuration information, wherein the filler absorption tower configuration information comprises filler absorption tower parameter information and filler absorption tower feeding information.
The dynamic simulation method is widely applied to dynamic characteristic analysis of various chemical processes, advanced control system design, start-stop process, safety analysis and research, chemical process simulation training system and the like. Among various unit devices of the dynamic simulation software, the absorption tower is a relatively complex unit device, and the stability and solving speed of calculation of the absorption tower influence the performance of the whole chemical process simulation software. And the absorption and analysis unit operation is widely applied in the chemical process. The solving algorithm of the packing absorption tower provided by the invention has the advantages of high calculation precision, strong stability and clear solving thought, and is suitable for computer solving. The simulation model construction method of the filler absorption tower provided by the embodiment of the invention can be realized through dynamic simulation software (Omnisim).
Fig. 2 is a schematic structural diagram of a packing absorption tower provided by the embodiment of the invention, and as shown in fig. 2, the packing absorption tower comprises a packing layer and a tower kettle tank body, and the simulation model construction of the packing absorption tower can be understood as performing calculation of pressure flow, component balance, energy balance and the like on the packing layer and the tower kettle tank body.
In the embodiment of the invention, preset configuration information of the filler absorption tower is acquired, wherein the configuration information of the filler absorption tower comprises parameter information of the filler absorption tower and feeding information of the filler absorption tower. It is understood that the parameter information of the filler absorption tower is the parameter information of the filler absorption tower equipment, and the feeding information of the filler absorption tower comprises the feeding information of the top of the filler absorption tower and the feeding information of the tower kettle. Optionally, the parameter information of the filler absorption tower comprises the diameter and the height of a filler layer, the initial liquid holdup of the tower, the initial liquid holdup composition mole fraction of the tower, the diameter and the height of a tower kettle, the initial liquid holdup of the tower kettle, the initial liquid holdup composition mole fraction of the tower kettle and the initial liquid holdup height of the tower kettle; the filler absorption tower feeding information comprises liquid phase feeding composition and flow rate, gas phase feeding composition and flow rate of the absorption tower.
S120, determining the tower outlet pressure of the filler absorption tower according to the configuration information of the filler absorption tower, wherein the tower outlet pressure comprises tower outlet gas pressure and tower outlet liquid pressure.
Optionally, determining the tower outlet pressure of the packing absorption tower according to the configuration information of the packing absorption tower includes: determining the inlet gas pressure of the filler absorption tower according to the configuration information of the filler absorption tower; determining the tower outlet gas pressure of the filler absorption tower according to the tower inlet gas pressure; and determining the tower outlet liquid pressure of the filler absorption tower according to the tower outlet gas pressure. For example, the packing absorber configuration information may be input into a pre-trained inlet gas pressure determination model, and the inlet gas pressure of the packing absorber may be determined based on the output of the near-column gas pressure model. By way of example, the inlet gas pressure of a packed absorber can be determined based on the gas phase feed composition and flow rate of the packed absorber.
Wherein the operating pressure within the packed absorber is mainly determined by the pressure variation of the feed gas phase, and the gas pressure drop through the packed absorber is given by the user, in particular:
in the method, in the process of the invention,is the pressure of the gas entering the tower, and is unit kPa; />Is the pressure of the off-column gas; unit kPa;the pressure drop in the packed column is given by the user at the interface in kPa.
And for the liquid entering the tower, the pressure value of the liquid entering the tower does not influence the operating pressure of the packed absorption tower, so that the current liquid entering the tower of the packed absorption tower is a boundary condition specified by a user; for the liquid exiting the column, the pressure is equal to the pressure of the gas entering the column plus the static pressure of the liquid in the kettle body, specifically,
in the method, in the process of the invention,is the pressure of the liquid fed into the tower, and is unit kPa; />Is the pressure of the liquid coming out of the tower, and is unit kPa;is the pressure of the gas entering the tower, and is unit kPa; />The unit kmol/m3 is the molar density of the liquid in the tower kettle; />Is the gravity acceleration rate, the unit is m/s2; />The average molecular weight of the liquid in the tower kettle is kg/kmol; />The liquid level of the liquid in the tower kettle is expressed as m.
S130, determining tower outlet gas related information and tower outlet liquid related information of the filler absorption tower according to the tower outlet pressure.
The tower outlet gas related information may include information related to flow rate, component, temperature, etc. of the tower outlet gas, and the tower outlet liquid related information may include information related to flow rate, component, temperature, etc. of the tower outlet liquid. It will be understood that the off-column gas-related information refers to the related information of the gas finally flowing out from the top of the packed absorption column, and the off-column liquid-related information refers to the related information of the liquid flowing out from the bottom outlet of the packed absorption column.
Optionally, the tower outlet gas related information comprises the flow rate and the component of tower outlet gas, and the tower outlet liquid related information comprises the flow rate and the component of tower outlet liquid; determining tower outlet gas related information and tower outlet liquid related information of the filler absorption tower according to the tower outlet pressure, wherein the method comprises the following steps of: determining the gas flow and the components of the filler layer outlet of the filler absorption tower according to the tower outlet pressure; determining the flow of tower outlet gas of the filler absorption tower according to the gas flow of the filler layer outlet; determining the components of the tower outlet gas of the filler absorption tower according to the flow of the tower outlet gas of the filler absorption tower, the gas flow and the components of the outlet gas of the filler layer; and determining the flow and the components of the tower outlet liquid of the filler absorption tower according to the flow and the components of the liquid at the outlet of the filler layer of the filler absorption tower.
Optionally, determining the gas flow and the component of the filler layer outlet of the filler absorption tower and the liquid flow and the component of the filler layer outlet according to the tower outlet pressure includes: constructing a component balance equation of a packing layer of the packing absorption tower; acquiring a characteristic equation of the filler absorption tower; and determining the gas flow and the components of the filler layer outlet of the filler absorption tower and the liquid flow and the components of the filler layer outlet according to the tower outlet pressure, the component balance equation and the characteristic equation.
Specifically, the entire packed absorber consists of two sections: a packing layer part and a tower kettle tank body part. In the component balance calculation, it is necessary to perform the component balance calculation for the two portions separately.
The component balance equation of the packing layer of the packing absorption tower is as follows:
i=1…n+N+m
in the method, in the process of the invention,the unit kmol/h is the flow rate of the liquid flowing from the top of the column into the packing.
It should be noted that the number of the substrates,total flow of material from the top of the column>Are not equal and haveThe body is as follows:
wherein,the flow of the gas phase part of the material fed into the tower from the tower top; />And->The value of (2) may be determined by feeding +.>Multiplying the respective phase fractions. />The unit kmol/h is the flow rate of the gas flowing into the packing layer from the tower kettle;
Likewise, the number of the cells to be processed,total flow of material entering tower with tower kettle>Not equal, in particular:
wherein,the flow of the liquid phase part of the material fed into the tower from the tower kettle; />， />The value of (2) can be determined by feeding the column bottom +.>Multiplying the respective phase fractions.
The mole fraction of the component i in the liquid flowing into the packing layer from the top of the tower is free of units; />The mole fraction of the component i in the gas flowing into the packing layer from the tower kettle is free of units; />The mole fraction of the component i in the liquid flowing out of the packing layer from the tower kettle is free of units; />The mole fraction of the component i in the gas flowing out of the packing layer from the top of the tower is free of units; n, m are the amounts of absorbed component, desorbed component and inert component, respectively.
The component balance equation of the packing layer is n+n+m equations, and the number of the unknown quantity is 2 (n+n+m) +2, so that n+n+m+2 equations are introduced to solve.
In the embodiment of the invention, a normalization equation of a model and a characteristic equation of a filler absorption tower are introduced, wherein the normalization equation of the model is as follows:
the characteristic equation of the packed absorber is:
i=1…n1
i=1…n2
i=1…N1
i=1…N2
i=1…m
in the method, in the process of the invention,controlling the mole fraction of the absorbed component for the gas film in the gas flowing out of the packing layer;controlling the mole fraction of the desorbed component for the gas film in the gas flowing out of the packing layer; / >Controlling the mole fraction of the absorbed component for the liquid film in the liquid flowing out of the packing layer; />Controlling the mole fraction of the desorbed components for the liquid film in the liquid flowing out of the packing layer; />Is the mole fraction of inert components in the liquid flowing out of the packing layer; ，/>，/>，/>all are mole fractions at equilibrium (for solution see example three); />， />The number of transfer units under operating conditions (see example three for a solution).
Thus, 2 x (n+n+m) +2 equations and 2 x (n+n+m) +2 unknowns are all calculated, and the flow rates of the gas phase and the liquid phase at the outlet of the packing layer and the mole fractions of each component can be calculated (the method for calculating the equations is described in the second embodiment).
In the embodiments of the present invention, it will be understood that the gas flowing out of the packing layer is not the final outlet gas of the packing tower, because a part of the gas phase may be carried in the top feed, and this part of the gas phase may flow out of the packing absorption tower together with the gas flowing out of the packing layer after being mixed with the gas flowing out of the packing layer, specifically:
total flow of final overhead stream:；
the final tower outlet stream from the tower top has the following mole fraction:
wherein: i=1 … n+n+m;
it is understood that the total flow of the final tower outlet flow at the top of the tower is the flow of the tower outlet gas of the filler absorption tower, and the mole fraction of each component of the final tower outlet flow at the top of the tower is the component of the tower outlet gas of the filler absorption tower.
Liquid flow rate at tower bottom outletThe PF relationship can be calculated and can be regarded as a known quantity, and the calculated quantity can be directly used in the calculation of the component balance.
Liquid holdup in the tower kettle changes:
the concentration of the liquid at the outlet of the tower kettle is the same as that in the tower kettle, and the component balance equation of the tank body of the tower kettle is as follows:
wherein: i=1 … n+n+m
The flow and the components of the tower outlet liquid of the filler absorption tower can be calculated by the component balance equation of the tower kettle tank body.
Optionally, the tower outlet gas related information further comprises a temperature of tower outlet gas, and the tower outlet liquid related information further comprises a temperature of tower outlet liquid; determining tower outlet gas related information and tower outlet liquid related information of the filler absorption tower according to the tower outlet pressure, wherein the method comprises the following steps of: and determining the temperature of the tower outlet gas and the temperature of the tower outlet liquid according to the tower outlet pressure, the flow and the components of the tower outlet gas and the flow and the components of the tower outlet liquid.
In particular, the packed absorber is a complex unit operation of coupling mass and heat transfer together, so the heat transfer process is simplified in this model, and it is approximately considered that the heat transfer in the absorber has reached equilibrium, in particular, the temperature of the gas flowing out from the top of the packing layer is the same as the temperature of the liquid flowing in from the top of the packing layer, i.e The method comprises the steps of carrying out a first treatment on the surface of the Further, the gas exiting the column is a gas phase mixed gas contained in the top feed of the column and the gas flowing out from the top of the packing layer, and the temperatures of the gas phase mixed gas and the gas phase mixed gas are the same, but there is a possibility that a certain mixed heat exists, and the temperature after mixing is calculated by P-H flash evaporation:
；
the liquid temperature of the tower kettle is as follows:；
from the above formula, the temperature of the off-column gas is calculated based on the off-column pressure, the flow rate and the composition of the off-column gas, and the flow rate and the composition of the off-column liquidAnd the temperature of the liquid leaving the column->。
The simulation model construction method of the filler absorption tower provided by the embodiment of the invention comprises the following steps: acquiring preset filler absorption tower configuration information, wherein the filler absorption tower configuration information comprises filler absorption tower parameter information and filler absorption tower feeding information; determining the tower outlet pressure of the filler absorption tower according to the configuration information of the filler absorption tower, wherein the tower outlet pressure comprises tower outlet gas pressure and tower outlet liquid pressure; and determining tower outlet gas related information and tower outlet liquid related information of the filler absorption tower according to the tower outlet pressure. By the technical scheme provided by the embodiment of the invention, the problem of low calculation time delay or precision in the existing model calculation is solved, and the associated information of the filler absorption tower can be rapidly and accurately calculated so as to accurately construct the filler absorption tower model.
In some embodiments, after determining the off-column gas-related information and off-column liquid-related information of the packed absorber from the off-column pressure, further comprising: determining tower bottom physical property data of the filler absorption tower according to the tower outlet liquid association information; wherein, the physical property data of the tower kettle comprise tower kettle holding density, average molecular weight of the tower kettle holding and height of the tower kettle holding.
Specifically, the tower kettle holding density can be calculated according to the newly calculated tower kettle temperature, composition and pressure:the method comprises the steps of carrying out a first treatment on the surface of the Wherein the temperature, the composition and the pressure of the tower kettle are that of the tower outlet liquid of the filler absorption tower,Composition and pressure.
The average molecular weight of the liquid held by the tower kettle can be updated according to the following formula:；
the height of the liquid held by the tower kettle can be updated according to the following formula:。
table 1 is a variable table used in the method for constructing a simulation model of a packed absorption tower according to the embodiment of the present invention, and the physical meaning of all variables used in the embodiment of the present invention can be referred to table 1.
Table 1 variable table
/>
/>
/>
Example two
The second embodiment of the invention provides a component balance equation solving process of a filler layer, which specifically comprises the following steps:
the values in N, m, N1, N2 are recalculated to obtain the number of non-zero components, and the algorithm is as follows:
/>
；
1) When newm=0 holds, the amount of inert components is 0, and all components are absorbed or desorbed;
(1) when new1=0 and newn1=0:
i=1…n2
i=1…N2
in the formula, i=1 … n2
Wherein i= … N2;
(2) when new2=0 and newn2=0:
/>
i=1…n1
i=1…N1
in the formula, i=1 … n1
Wherein i= … N1;
(3) when (new1+newn1) ×new2+newn2) noteq0 holds:
wherein: i= … n1
Wherein: i= … N1
Wherein: i= … n2
Wherein: i= … N2.
2) When newm+.0 holds:
(1) when newn=0 and newn=0 holds at the same time:
i=1…n+N+m
i=1…n+N+m；
(2) when the above equation is not satisfied:
i whenAnd->At the same time, when the method is established:
a. when new1=0 and newn1=0 are simultaneously established:
i=1…n2
i=1…N2
in the formula, i=1 … n2
In the formula, i=1 … N2
Wherein i= … m;
b. when new2=0 and newn2=0 are simultaneously established:
i=1…m
i=1…n1
i=1…N1；
c. when (new1+newn1) ×new2+newn2) noteq0:
wherein: i= … n1
Wherein: i= … N1
Wherein: i= … n2
Wherein: i= … N2
Where i= … m. />
II whenAnd->At the same time, when the method is established:
a. when new2=0 and newn2=0 are simultaneously established:
i=1…n1
i=1…N1
in the formula, i=1 … n1
In the formula, i=1 … N1
In the formula, i= … m
b. When new1=0 and newn1=0:
i=1…m
i=1…n2/>
i=1…N2
C. when (new1+newn1) ×new2+newn2) noteq0 holds:
wherein: i= … n1
Wherein: i= … N1
Wherein: i= … n2
Wherein: i= … N2
In the formula, i= … m
III whenAnd->At the same time, when the method is established:
wherein: i=1 … n 1->
Wherein: i= … N1
Wherein: i= … n2
Wherein: i= … N2
In the formula, i= … m
Where i= … m.
Example III
The third embodiment of the invention provides a method for calculating the number of mass transfer units and the equilibrium concentration, which specifically comprises the following steps:
in the embodiment of the invention, the sectional area of the absorption tower is as follows:in m 2 The method comprises the steps of carrying out a first treatment on the surface of the The molar flow rate of the actual gas entering the tower per unit area is as follows: />The unit is kmol/m 2 ·hr。
The reference state area molar flow rate of the gas film control component entering the tower is as follows:unit kmol/m 2 Hr, where i=1 … n1;
units: kmol/m 2 Hr, where i= … N1
Molar flow rate per unit area of liquid fed into the column:units: kmol/m 2 ·hr；
Reference state area molar flow of liquid film control component into the column:
units: kmol/m 2 Hr, where i=1 … n2
Units: kmol/m 2 Hr, where i=1 … N2
Height of mass transfer unit for absorbed component:
in the formula, i=1 … n1
In the formula, i=1 … n2
Mass transfer unit height of desorbed components:
in the formula, i=1 … N1
In the formula, i=1 … N2
Mass transfer unit number:
i=1…n1
i=1…n2
i=1…N1
i=1…N2
1) For n1 components that are gas film controlled to be absorbed:
firstly judging whether the user has selective chemical guidance, if so, the equilibrium concentration of the corresponding components Equal to 0, otherwise, the following calculation is made for this component:
(1) calculating the component loss degree of the component in the feed liquid phase:
it is known that:,/>,/>calculating the composition loss degree of the gas film control absorbed composition: />
i=1…n1
(2) The equilibrium concentration of this component was calculated:
i=1…n1；
then making n1 times of judgment, if there isi= … n1 holds true, changing the sign of this component i to an inert component.
2) For liquid film control of absorbed components
Firstly judging whether the user has selective chemical guidance, if so, the equilibrium concentration of the corresponding componentsOtherwise, the following calculation is performed for the component:
(1) calculating the component loss degree of the component in the feed gas phase:
it is known that:，/>，/>calculating the component loss degree of the liquid film controlled absorbed component:
i=1…n2
(2) calculating the component loss degree of the component in the feed liquid phase:
it is known that:，/>，/>calculating the component loss coefficient of the absorbed component controlled by the liquid film:
i=1…n2
(3) the equilibrium liquid phase concentration of this component was calculated:
i=1…n2
then making n2 times of judgment, if there isi= … n2 holds, the flag of component i is changed to an inert component.
3) For controlling desorbed components by gas film
Firstly judging whether the user has selective chemical guidance, if so, the equilibrium concentration of the corresponding componentsOtherwise, the following calculation is performed for the component:
(1) Calculating the component loss degree of the component in the feed liquid phase:
it is known that:,/>,/>and (5) calculating the component loss degree of the component which is desorbed by the gas film control: />
i=1…N1
(2) The equilibrium concentration of this component was calculated:
i=1…N1
then N1 times of judgment are carried out, if there isi= … N1 holds, the flag of component i is changed to an inert component.
4) For liquid film control of desorbed components
Firstly judging whether the user has selective chemical guidance, if so, the equilibrium concentration of the corresponding componentsEqual to 0, otherwise, the following calculation is made for this component:
(1) calculating the component loss degree of the component in the feed gas phase:
it is known that:，/>，/>calculating the component loss degree of the liquid film controlled absorbed component:
i=1…N2
(2) calculating the component loss tangent of the component in the feed liquid phase:
it is known that:，/>，/>calculating the component loss degree of the liquid film controlled absorbed component:
i=1…N2
(3) the equilibrium liquid phase concentration of this component was calculated:
i=1…N2
then N2 times of judgment are carried out, if there isi= … N2 holds true, changing the sign of component i to an inert component.
Finally, to,/>A determination is made if their value is abnormally large (this problem is due to systematic errors in average impulse), in particular:
if there are:if the numerical value is too large, then +.>；
If there are: If the numerical value is too large, then +.>
。
Example IV
Fig. 3 is a schematic structural diagram of a simulation model building device for a packing absorption tower according to a fourth embodiment of the present invention. As shown in fig. 3, the apparatus includes:
a configuration information obtaining module 310, configured to obtain preset configuration information of a packing absorption tower, where the configuration information of the packing absorption tower includes parameter information of the packing absorption tower and feeding information of the packing absorption tower;
a tower outlet pressure determining module 320, configured to determine a tower outlet pressure of the packed absorber according to the packed absorber configuration information, where the tower outlet pressure includes a tower outlet gas pressure and a tower outlet liquid pressure;
the related information determining module 330 is configured to determine, according to the outlet pressure, outlet gas related information and outlet liquid related information of the packed absorber.
Optionally, the tower outlet pressure determining module is configured to:
determining the inlet gas pressure of the filler absorption tower according to the configuration information of the filler absorption tower;
determining the tower outlet gas pressure of the filler absorption tower according to the tower inlet gas pressure;
and determining the tower outlet liquid pressure of the filler absorption tower according to the tower outlet gas pressure.
Optionally, the tower outlet gas related information comprises the flow rate and the component of tower outlet gas, and the tower outlet liquid related information comprises the flow rate and the component of tower outlet liquid;
the association information determining module includes:
the packing layer information determining unit is used for determining the gas flow and the components of the packing layer outlet of the packing absorption tower and the liquid flow and the components of the packing layer outlet according to the tower outlet pressure;
the tower outlet gas flow determining unit is used for determining the flow of tower outlet gas of the filler absorption tower according to the gas flow of the filler layer outlet;
the tower outlet gas component determining unit is used for determining the components of the tower outlet gas of the filler absorption tower according to the flow of the tower outlet gas of the filler absorption tower, the gas flow and the components of the outlet gas of the filler layer;
and the tower outlet liquid information determining unit is used for determining the flow and the components of tower outlet liquid of the filler absorption tower according to the flow and the components of liquid at the outlet of the filler layer of the filler absorption tower.
Optionally, the filler layer information determining unit is configured to:
constructing a component balance equation of a packing layer of the packing absorption tower;
acquiring a characteristic equation of the filler absorption tower;
And determining the gas flow and the components of the filler layer outlet of the filler absorption tower and the liquid flow and the components of the filler layer outlet according to the tower outlet pressure, the component balance equation and the characteristic equation.
Optionally, the tower outlet gas related information further comprises a temperature of tower outlet gas, and the tower outlet liquid related information further comprises a temperature of tower outlet liquid;
the association information determining module is used for:
and determining the temperature of the tower outlet gas and the temperature of the tower outlet liquid according to the tower outlet pressure, the flow and the components of the tower outlet gas and the flow and the components of the tower outlet liquid.
Optionally, the apparatus further includes:
the physical property data determining module is used for determining tower bottom physical property data of the filler absorption tower according to the tower outlet liquid related information after determining tower outlet gas related information and tower outlet liquid related information of the filler absorption tower according to the tower outlet pressure; wherein, the physical property data of the tower kettle comprise tower kettle holding density, average molecular weight of the tower kettle holding and height of the tower kettle holding.
Optionally, the parameter information of the filler absorption tower comprises the diameter and the height of a filler layer, the initial liquid holdup of the tower, the initial liquid holdup composition mole fraction of the tower, the diameter and the height of a tower kettle, the initial liquid holdup of the tower kettle, the initial liquid holdup composition mole fraction of the tower kettle and the initial liquid holdup height of the tower kettle; the filler absorption tower feeding information comprises liquid phase feeding composition and flow rate, gas phase feeding composition and flow rate of the absorption tower.
The simulation model construction device of the filler absorption tower provided by the embodiment of the invention can execute the simulation model construction method of the filler absorption tower provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Example five
Fig. 4 shows a schematic diagram of the structure of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 4, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the respective methods and processes described above, for example, a simulation model construction method of the packed absorber.
In some embodiments, the method of constructing a simulation model of a packed absorber may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the above-described simulation model construction method of the packed absorption tower may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the simulation model building method of the packed absorber by any other suitable means (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (7)
1. The method for constructing the simulation model of the filler absorption tower is characterized by comprising the following steps of:
acquiring preset filler absorption tower configuration information, wherein the filler absorption tower configuration information comprises filler absorption tower parameter information and filler absorption tower feeding information;
determining the tower outlet pressure of the filler absorption tower according to the configuration information of the filler absorption tower, wherein the tower outlet pressure comprises tower outlet gas pressure and tower outlet liquid pressure;
Determining tower outlet gas related information and tower outlet liquid related information of the filler absorption tower according to the tower outlet pressure;
wherein determining the tower outlet pressure of the filler absorption tower according to the filler absorption tower configuration information comprises:
determining the inlet gas pressure of the filler absorption tower according to the configuration information of the filler absorption tower;
determining the tower outlet gas pressure of the filler absorption tower according to the tower inlet gas pressure;
determining a liquid pressure of the packed absorber column from the column outlet gas pressure;
the tower outlet gas related information comprises the flow and the components of tower outlet gas, and the tower outlet liquid related information comprises the flow and the components of tower outlet liquid;
determining tower outlet gas related information and tower outlet liquid related information of the filler absorption tower according to the tower outlet pressure, wherein the method comprises the following steps of:
determining the gas flow and the components of the filler layer outlet of the filler absorption tower according to the tower outlet pressure;
determining the flow of tower outlet gas of the filler absorption tower according to the gas flow of the filler layer outlet;
determining the components of the tower outlet gas of the filler absorption tower according to the flow of the tower outlet gas of the filler absorption tower, the gas flow and the components of the outlet gas of the filler layer;
Determining the flow and the components of the tower outlet liquid of the filler absorption tower according to the flow and the components of the liquid at the outlet of the filler layer of the filler absorption tower;
the method for determining the gas flow and the components of the filler layer outlet of the filler absorption tower and the liquid flow and the components of the filler layer outlet according to the tower outlet pressure comprises the following steps:
constructing a component balance equation of a packing layer of the packing absorption tower;
acquiring a characteristic equation of the filler absorption tower;
and determining the gas flow and the components of the filler layer outlet of the filler absorption tower and the liquid flow and the components of the filler layer outlet according to the tower outlet pressure, the component balance equation and the characteristic equation.
2. The method of claim 1, wherein the off-column gas-related information further comprises a temperature of an off-column gas, and the off-column liquid-related information further comprises a temperature of an off-column liquid;
determining tower outlet gas related information and tower outlet liquid related information of the filler absorption tower according to the tower outlet pressure, wherein the method comprises the following steps of:
and determining the temperature of the tower outlet gas and the temperature of the tower outlet liquid according to the tower outlet pressure, the flow and the components of the tower outlet gas and the flow and the components of the tower outlet liquid.
3. The method of claim 1, further comprising, after determining the off-column gas-related information and the off-column liquid-related information for the packed absorber based on the off-column pressure:
determining tower bottom physical property data of the filler absorption tower according to the tower outlet liquid association information; wherein, the physical property data of the tower kettle comprise tower kettle holding density, average molecular weight of the tower kettle holding and height of the tower kettle holding.
4. The method of claim 1, wherein the packing absorber parameter information comprises a diameter and packing layer height of the column, an initial hold-up volume of the column, an initial hold-up composition mole fraction of the column, a diameter and height of the column, an initial hold-up volume of the column, an initial hold-up composition mole fraction of the column, an initial hold-up height of the column; the filler absorption tower feeding information comprises liquid phase feeding composition and flow rate, gas phase feeding composition and flow rate of the absorption tower.
5. The simulation model construction device of the packing absorption tower is characterized by comprising the following components:
the system comprises a configuration information acquisition module, a storage module and a storage module, wherein the configuration information acquisition module is used for acquiring preset configuration information of a filler absorption tower, and the configuration information of the filler absorption tower comprises parameter information of the filler absorption tower and feeding information of the filler absorption tower;
The tower outlet pressure determining module is used for determining the tower outlet pressure of the filler absorption tower according to the filler absorption tower configuration information, wherein the tower outlet pressure comprises tower outlet gas pressure and tower outlet liquid pressure;
the associated information determining module is used for determining tower outlet gas associated information and tower outlet liquid associated information of the filler absorption tower according to the tower outlet pressure;
wherein, the tower outlet pressure determining module is used for:
determining the inlet gas pressure of the filler absorption tower according to the configuration information of the filler absorption tower;
determining the tower outlet gas pressure of the filler absorption tower according to the tower inlet gas pressure;
determining a liquid pressure of the packed absorber column from the column outlet gas pressure;
the tower outlet gas related information comprises the flow and the components of tower outlet gas, and the tower outlet liquid related information comprises the flow and the components of tower outlet liquid;
the association information determining module includes:
the packing layer information determining unit is used for determining the gas flow and the components of the packing layer outlet of the packing absorption tower and the liquid flow and the components of the packing layer outlet according to the tower outlet pressure;
the tower outlet gas flow determining unit is used for determining the flow of tower outlet gas of the filler absorption tower according to the gas flow of the filler layer outlet;
The tower outlet gas component determining unit is used for determining the components of the tower outlet gas of the filler absorption tower according to the flow of the tower outlet gas of the filler absorption tower, the gas flow and the components of the outlet gas of the filler layer;
the tower outlet liquid information determining unit is used for determining the flow and the components of tower outlet liquid of the filler absorption tower according to the flow and the components of liquid at the outlet of the filler layer of the filler absorption tower;
wherein, the filler layer information determining unit is used for:
constructing a component balance equation of a packing layer of the packing absorption tower;
acquiring a characteristic equation of the filler absorption tower;
and determining the gas flow and the components of the filler layer outlet of the filler absorption tower and the liquid flow and the components of the filler layer outlet according to the tower outlet pressure, the component balance equation and the characteristic equation.
6. An electronic device, the electronic device comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the simulation model construction method of the packed absorber of any one of claims 1 to 4.
7. A computer-readable storage medium storing computer instructions for causing a processor to implement the method of constructing a simulation model of a packed absorber according to any one of claims 1 to 4 when executed.
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