JPS59109967A - System for inputting-outputting drawing for plant design calculation - Google Patents

Abstract

PURPOSE:To reduce errors produced when simulating a program and to shorten the implementing period of an output graphic, by providing a graphic processing program to a graphic processing terminal device. CONSTITUTION:A steady process simulator 16 is connected with a host computer 11 and a graphic terminal processing device 13 is connected to the host computer 11 through a data base managing system 14 and graphic processing program 15. Streams flowing between each apparatus are drawn on the tablet 3-3 of the device 13 in the form of flows and elemental characteristic sheets representing specifications of each apparatus, such as name of inputted variable, calculating conditions, etc., are read out by the system 14. Then, calculating conditions, such as parameter value, external input value, etc., are set on the tablet 3-3 and data to be inputted into the simulator 16 are implemented and, at the same time, the block of sheets displayed on a display device 3-2 is replaced with a symbol picture registered in the system 14. Then, a simulated result is implemented by using the symbol and the implementing period of an output graphic is shortened.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an input/output method for drawings for plant design calculations, and in particular, to a method for inputting and outputting drawings for plant design calculations, and in particular, a large-scale system that can reduce data input errors in plant simulation and shorten the time required to create output results. It concerns input/output methods for large-scale plant systems.

[Prior art]

Conventionally, plants have used steady-state process simulators that calculate material balance and energy balance. This process simulator does not have the ability to read the input data required for simulation from drawings, and humans code the data manually based on the drawings, so when dealing with large-scale plant systems with many input variables, it is difficult to Errors in the order of operations occur, and many troubles occur before simulation can begin.

FIG. 1 is a flowchart showing the procedure of a conventional simulation.

As an example, the procedure of the simulator will be explained according to "Computer Utilization Technology" edited by the Chemical Engineering Society (Maki Shoten 1978. PP94-134).

(1) Setting a simulation plan...Plans that utilize process simulation include designing new processes and improving existing plants. At this stage, the external factors (conditions) of the simulation are investigated and
Clarify the evaluation items and organize the items to be considered after the simulation.

(2) Creating a process flow sheet...Create a process flow sheet in accordance with the simulation objective 1fC. A process flow sheet is, for example, a configuration diagram showing information on the main equipment that makes up a chemical process and the flow of main substances, and is the basis for designing and examining chemical processes.

・1(3) Decomposition into unit operation functions...In order to create a mathematical model, the process flow sheet is divided into unit operations. Usually, the unit is the function of one device, but depending on the purpose of the simulation, it may be further divided into smaller units.

(4) Creating a mathematical model...Create a mathematical model for each divided unit operation. For standard unit operations, it may be sufficient to prepare material data using a model provided in the simulator, but depending on the purpose of the simulation, it may be necessary to create a new mathematical model.

(5) Creation of information flow/jet notes/
...Information flow sheet,
It expresses the connection relationship of the mathematical model of unit operations in the process flow sheet. Since the information flow sheet is a diagram for performing a simulation, it also includes the process flow, features that are not on the sheet, and mathematical models necessary for performing the simulation (for example, stream merging and diversion). . Usually, a mathematical model is represented by a block, and the flow of information between mathematical models is represented by a stream, which is given a stream name.

(6) Consideration of recycling stream and degree of freedom...
...Perform preliminary calculations before actually starting the simulation. When there is no recycle stream, the mathematical model can be calculated sequentially from upstream to downstream of the stream. However, when there is a recycle stream, a mathematical model that inputs the uncalculated recycle stream from the downstream side cannot be calculated. The reason is that a mathematical model cannot be calculated unless all input variables are known. If there is a mathematical model that cannot be calculated, the subsequent mathematical models shown below &401 will not be calculated, and simulation will eventually become impossible. In order to avoid this, we proceed with the calculation by cutting off any one point in the recycle stream and assuming the state of the stream.
The calculation is continued by replacing the assumed value with the corrected value until the convergence condition (the condition that the difference between them is less than or equal to a certain threshold) is satisfied. Since the convergence time usually differs depending on where in the recycle stream the assumed value is given, the place where the assumed value is given and its initial value are determined by this operating procedure.

(7) Creating simulation data...Input data to the simulator includes (a) Name of the mathematical model to be used (block name L) (b) Connection relationship between mathematical models (S) IJ-me number ), (C) There are three parameters for each mathematical model. Once the necessary data is in place, code it according to the simulator's input format, but as the process becomes more complex, there will be more opportunities for errors, so pay attention to the following: (b) Duplication of stream numbers and block names, (b) Use of non-existent block names, (c) Mistakes in block and stream names, (e) Grammatical errors in input forms, (e) Parameter entry order Errors, etc.

(8) Execution and evaluation of the simulation...Even if all the simulation termination conditions are satisfied, from a chemical process standpoint, the simulation results are often incorrect in the early stages of the simulation. , it is necessary to thoroughly consider the simulation results. If there are any parts that look unnatural or unsatisfactory, you will need to repeat the previous steps as many times as you like.

Among the simulation procedures (1) to (8) above, errors are likely to occur in (7) creation of simulation data. The root cause of errors is the process
Although simulations are being considered using flow sheets or information sheeters, there is a drawback that input data must be coded by humans based on drawings because drawings cannot be input.

Furthermore, from the point of view of drawing output, conventionally, simulations are performed before drawings are created.3 This is because the plant configuration may change depending on the results of the simulation. In other words, since simulation and drawing creation are serial operations, this is naturally done.

[Purpose of the invention]

The purpose of the present invention is 1. To improve these conventional problems,
An object of the present invention is to provide a drawing input and output port creation method for plant design calculations, which can reduce data input errors that occur during plant simulation and shorten the time required to create output diagrams created as a result of simulation.

[Summary of the invention]

The drawing input and output port creation method for plant design calculations of the present invention uses a computer system having a steady process simulator, a graphic processing terminal device, and a data pace management system, in which equipment is blocked and streams flowing between the equipment are created as flows. Draw the block flow sheet representing each on the tablet on the graphic processing terminal device, and call up the element characteristic sheet representing specifications such as input/output variable names and calculation conditions for each device from the data pace management system.
Set calculation conditions such as parameter values and external input values on the tablet to create input data to the steady process simulator, and display simulation results on a plant configuration diagram (process flow diagram) using symbols. The process flow diagram is created by registering the blocks of the block flow sheet displayed on the display of the graphics processing terminal device in the data pace management system and replacing them with symbol diagrams. be.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is an overall block diagram of a computer system showing an embodiment of the present invention.

The computer system of the present invention is an organic combination of three devices: a steady process simulator 16, a graphic processing terminal device 13, and a database management system 14, as shown in FIG. Note that 17 is a core memory, 15 is a graphics processing program, and 12 is a memory accessed through the database management system 14.

FIG. 3 is a flowchart of a simulation procedure showing an embodiment of the present invention.

A simulation procedure using the three devices shown in FIG. 2 will be explained.

(21) Setting up a simulation plan: A process engineer develops a concept for 7 simulations. Here, we will mainly consider the equipment model (mathematical model) required to perform the simulation. That is, all equipment models that are considered necessary are listed in light of the purpose of the simulation, such as selecting an alternative configuration plan.

Among these device models, for those that can use already created models, use the already created models as much as possible to shorten the preparation period for starting simulation.

(22) Checking already created equipment models A list of equipment models created so far is read from areas 2 and 7 of the memory 12 and displayed on the display. Use a stylus pen to mark the number of the device model to be used in this simulation. The selected equipment name is displayed on the display to facilitate the creation of blocks 70--sheets. If the device model to be used this time is not on the list, a new mathematical model is created and stored in areas 2 and 13 of the memory 12.

(23) Creation of element characteristic sheet After creating the device model, create an element characteristic sheet showing the input/output groups and parameter names of the device model. The equipment model is represented by a block (rectangle) on the block flow sheet, which is an input diagram to the simulator, but is represented by equipment symbols on the process-flow diagram. Therefore, when creating the element characteristic sheet, a symbol diagram showing the equipment is also created and displayed on the element characteristic sheet. Note that the input/output variable names used in the device model are registered in the variable list. The variable list is used later when inputting figures, and is stored in the memory area 28.
is stored in.

(24) Drawing input) 1″L V-p to 96″7″-phz・740
There are 3 types of 1″.

(a) Device model name to be used (block name) (b) Connection relationship between device models (flow name) (C) Calculation conditions (external input values, parameter values) These data are obtained using the graphic processing terminal device 13. , block flow sheet) and input it on the element 41 sheet. That is, data (a) (b
) is input from the block flow sheet, and data (C) is input from the element characteristic sheet.

A block flow sheet is created on a tablet by the designer as follows.

(1) Read the framework of the block flow sheet from memory areas 2 and 10. (2) Read the device model name to be used from the already created device model list (memory areas 2, 7') using a command and display it. (3) After specifying the name of the device to be placed with the stylus pen, specify its location on the tablet. As a result,
A block is placed and a name is displayed inside the block.

FIG. 4 is a diagram showing a block flow sheet immediately before completion of placement.

Among the devices at the bottom left of the screen in FIG. 4, those whose placement has been completed are marked with a diagonal line. In Figure 4, the fifth device name CLU
It shows that all the other devices have been placed except for PD2.

(4) When information is being transmitted between device models, enter the flow. Flow from one device to another
In this case, indicate the bending point of the flow with the stylus pen, and press 2.
Connect the points with straight lines. Enter a name for the flow. Note that the function of the graphic processing terminal device 130 makes it possible to partially enlarge the drawing and apply a mesh to prevent the flow from being distorted.

When a block flow sheet is drawn on the tablet by this operation, the block name, block position, flow start point/end point position, etc. are read using the graphic processing terminal device 13, and the data base management system 14 The data is stored in memory areas 2.1 to 2.3 through the memory area.

(25) Creation of simulation input data Create simulation input data based on the data read from the drawing. This data is stored in memory via the database management system 14 so that it can be read at any time.
Area 2. ．． 11.

(20 Simulation Execution The simulation is started by loading the input data to the simulator. If the target plant system includes recycling, the convergence variable is It is necessary to set initial values.The steady process simulator displays the presence or absence of recycling and the names of variables that give initial values, so the designer uses this as a guide to set initial values.

As a result, convergence calculation is performed and the final calculation result is obtained.

(27) Outputting calculation results to input drawings To save the calculation results, output the calculation results to input drawings (block flow sheets, element characteristic sheets), and store these drawings in memory 2/14. . The block flow sheet displays the main calculation results in order to understand the characteristics of the entire plant. The variable names to be displayed are registered in advance using a variable list. The designer can view the block flow diagram displayed after the simulation is completed.
Look at the sheet and use the stylus pen to indicate the name of the flow you want to display. The results are displayed in a matrix.

On the other hand, in order to understand the simulation results in detail,
All input and output variable values for each equipment model are displayed on the element characteristic sheet. By storing this sheet in memory area 2.9, detailed examination of the simulation is possible at any time.

(28) Creation of PFD (process flow diagram)...A block flow sheet is sufficient as a drawing for simulation, but in order to submit it to a customer, etc. Process flow diagram (P l”
D) is required. As for the PFD drawing procedure, first,
Call up the block flow diagram on the display. If you use the stylus to indicate a block in the block flow diagram and the mesh in which it should be placed, the block will be replaced with a symbol diagram on another screen.

In order to save the effort of sequentially switching screens to view the replacement status, the entire layout mesh is regarded as one screen, and the occupancy status of the symbol diagram is indicated by hatching.

Figure 5 shows the block diagram showing the replacement status to the symbol diagram.
It is a flow sheet.

FIG. 5 is a flow sheet of the desulfurization system, showing 31
3 is an adsorption tower, 32 is a desulfurization tower, 33 is a reduction tower, 34 is a condenser, 35 is a reactor, 36 is a condenser, 37 is a sulfurization tower, 3
8 is a performance calculation section, and 39 is a capacitor.

When the symbol diagram occupies a certain amount of the screen, the creation of one screen of the symbol diagram is finished, and the screen is switched to check the creation status of the symbol diagram.

Next, fill in the flow of the symbol section using a stylus pen and add the flow name. In this way, screens of symbol diagrams are created one after another and the PFD is completed. Note that scrolling is possible in order to check the connection relationship between screens displaying symbol diagrams.

FIG. 6 is a symbol diagram in which a flow is added after block replacement, and the screen is scrolled to check connections between screens.

After replacing all blocks with symbol diagrams and checking the creation status, a PFD is output using an XY plotter.

The detailed operation will be explained below according to the procedure shown in FIG.

A. Every time you create a screen display device model for a table creation model, its information (creation number,
The device name, subroutine name, notes) are stored in the memory areas 2 and 7 by the graphic processing program 15. Note that in order to simplify the search for information stored in the memory 12,
Management of the memory 12 utilizes a database management system 14. A list of device models can be found in memory area 2.
By calling up the information stored in 13 as it is, it can be easily displayed on the display 5/2.

When the number of the device model to be used is specified using the stylus pen 3 and the cow, the graphic processing program 15 performs the following processing.

(a) When the i device model is specified, stylus pen 3
・Read the position on raw tablet 3・δ.

(b) The position on the tablet of the creation number of each device model is stored in memory areas 2 and 7 when the device model is registered. Among the positions of these creation numbers, search for the one closest to the position of the stylus pen read with (al).

(C) The creation number found through the above search is stored in memory area 2.・Stored in 7. This number is used when creating a block flow sheet.

B. Creation of element characteristic sheet The element characteristic sheet consists of the following data.

(1) Table framework (including title), (ii) Data to be written in the calculation input field, (iii) Data to be written in the calculation output field, GV) Data to be written in the input constant parameter field, (V) Symbol diagram.

At the stage of creating the element characteristic sheet, the parameter values to be written later to start the simulation and the input values and output values to be written after the simulation is executed are left blank. At this stage, the main task is to write input/output variable names, parameter names, and their units in the appropriate columns.

Here, a variable list is used to simplify the listing of the variable names and parameter names. The variable list is a table in which input/output variable names, parameter names, and their units used in the device model are restored, and is stored in the memory, engineering, rear 2, and 8. The element characteristic sheet is created by the graphic processing program 15. The processing details are as follows.

(a) Call up the frame of the element characteristic sheet stored in the memory area 2.9 onto the display 3.2. (
b) For each of the input variable name, output variable name, and parameter name, specify the designated variable list number and display each name and unit in the corresponding column of the element characteristic sheet.

(C) Save the symbol diagram of the element characteristic sheet to memory area 2. - Call from 10 and display it in the corresponding column.

The variable list is not only necessary for creating an element characteristic sheet, but is also used to distinguish between multiple variables included in one flow and to display calculation results on a block flow sheet.

When drawing the C0 drawing input block flow sheet, the graphic processing program 15 performs the following processing according to FIG.

Step 41...The name of the equipment model used for simulation is read from the memory areas 2 and 7, and the equipment model name is displayed together with the framework of the block flow sheet. Step 42: A command to draw a block is given, and the position is specified using the stylus pen, so a block is drawn centered at that position. Step 4
3... After the name shown at the bottom left of the block flow sheet is indicated with a stylus pen, the block in which it is to be entered is indicated with the stylus pen in the same way. The position of the stylus is read, and first, it searches for which name is specified. The method determines that the closest name to the stylus has been indicated.

Next, in a similar manner, the block indicated by the stylus pen is determined and the indicated name is written in the block. Step 44: For the blocks whose arrangement has been completed, mark the name at the bottom left of the block flow sheet. Step 45: A command to draw a flow is given, and the positions of bending points of the flow are indicated with a stylus pen, so these points are successively connected with straight lines. Step 46...Finally, after a command to draw the name of the flow is given, the name and its position are given with the stylus pen, so the name is displayed at the designated position. Step 47...The block drawn by the above operation.
Store the following data in memory in order to recall the flow sheet and draw it on the display.

(a) Store the block position in memory area 2.1. (b) Save the block name and flow name to memory area 2.
Store in 2. (e) Store the start and end points of the flow and the positions of the bending points in the middle in memory areas 2 and 3.

When inputting data from the element characteristic sheet, the graphic processing program 15 performs the following processing.

(i) The name of the device model used for simulation is read from memory areas 2 and 7, and its element characteristic sheets are sequentially displayed on the screen.

(11) For each element characteristic sheet, read the value written in the parameter column with the stylus pen and store it in memory area 2.

(1:1) For each element characteristic sheet, if there is external input, add headquarters to the input variable name. This is a process for the simulator user to identify variables that will be external inputs from among a large number of input variables without error. The processing details are as follows. (a) Search for a flow whose starting point does not come from any block on the block flow sheet. (b) In addition to the flow that is external input,
If there is no input flow, display middle age for all input variables on the element characteristic sheet for that block. (c) If there is an input flow in addition to the flow that is an external input, perform the following processing to separate external variables. In other words, flows that are not external inputs are connected to other blocks, so
Explore that block. The output variable name of the element characteristic sheet of the searched block is compared with the input variable name of that block, and variables with the same name are not considered as external inputs. The remaining variables are external input variables, so a middle mark is displayed.

(IV) For each of the 9 element characteristic sheets, stylus space
The external input value written in the calculation input field by K is read and stored in memory area 2, Cow.

D. Based on the data read from the simulator input data creation block flow sheet, the simulator input data is created using the graphic processing program 1.
Create in 5.

The input data for the simulator is as follows.

Namely, (a) subroutine name, (b) input/output variable name of each subroutine, (c) external input value, (c) parameter name and value of each subroutine, and (e) recycling loop initial value.

Here, in order to clarify the image of the input data of the simulator, the actual input data will be explained using FIG. 9, taking the simple block flow sheet shown in FIG. 8 as an example.

In FIG. 9, after all subroutines have been written, a % is inserted to indicate a delimiter (see the data number). Data number 5 5AAA X 2...
...(1) has the following meaning. First, 5AAA
indicates the subroutine name, X indicates that the variable name that follows is the input of the subroutine, and 2 indicates the number of input variables. Next data number 60Fl, data number 70
F3 is the input variable name of subroutine 5AAA. In the same way, data number 8 5AAA Y
l (2) indicates the subroutine name, a symbol indicating that the following variable name is the output of the subroutine, and the number of output variables. After writing input/output flow names for all subroutines, write blank data as a delimiter (
Data number 18). Data number 19 is an external input value.

The external input value refers to a flow that is not an output of a subroutine (a so-called flow given from the outside), such as flow Fl shown in FIG. data number 20
22 are data specifying parameters of the subroutine, 5BBB of data number 20 is the subroutine name, and 1 is the number of parameters. Data numbers 21 and 22 are parameter names and parameter values. After setting parameters for all subroutines having parameters, a blank is written as a delimiter (data number 23).

All the input data for executing the simulation has been described above. Initial value of the recycle loop that is input after checking the results after running the simulation (see above)
This will be discussed in the next section.

Now, a method for creating input data for the simulator using the graphic processing program 15 based on data read from the block flow sheet will be described below.

FIG. 10 is a flowchart of the input data creation process of the simulator.

Step 51...The subroutine name is read from memory area 2.2 and created. Step 52: Input and output variable names for each subroutine are created as follows.

(1) For each subroutine, search its input and output flows. This method searches the memory area 21.3 for a flow whose end point is closest to the location of the subroutine (block) stored in the memory area 21.1, and determines that flow as a manual flow. Similarly, a flow with the closest starting point is searched in memory areas 2 and 3, and this is set as the output flow.

(11) Next, the number of input variables is read from the calculation input column of the element characteristic sheet. The input variable name is created by adding the flow name specified when creating the block flow sheet and the input variable name on the element characteristic sheet. For example, the input flow name is AA, there are two input variables on the element characteristic sheet, and the variable names are BB and CC.
If so, the subroutine's input variable name is created as follows.

The reason why input variable names are synthesized and created as in ABB AAC is to ensure data transfer between subroutines, which will be described in the next section, and will be explained in detail in the next "Simulation Execution." Note that although the input variable names on the element characteristic sheet are written in Japanese to be easily understood by those using the simulator, they must be converted into English characters in order to create input data for the simulator. This uses the alphabetic characters in the conversion data column of the variable list. (iii) Output variable names are created in the same way (steps 53 to 54). Next, create the input data for the simulator meeting using the external input values and parameter values set from the element property sheet. state Step 55: Count the number of parameters based on the element characteristic sheet. Next, the variable name in English letters corresponding to the Japanese base on the element property sheet is read from the conversion data column of the variable list. Parameter values are read from memory area 2 cow. Based on the above data, input data corresponding to data numbers 20 to 22 in FIG. 9 is created. Step 56...The value of the external input is
Read from memory area 21.4 to create input data. When there is a plurality of input data, the external input values are set according to the order of the subroutines registered in data numbers 1 to 3 in FIG. The input data created in this way is stored in memory areas 2 and 11.

E. Execution of Simulation The process for transferring data between subroutines based on the created input data will now be described.

(a) Based on the input/output variable names of each subroutine, restore variable names so that there are no duplicates. Taking FIG. 8 as an example, the restored data is as shown in FIG. 11. Transfer this to memory area 7 of core memory 17.
・Stored to 1. The calculated value of the variable is stored in the location of memory area 7.'h corresponding to the variable name of memory area 7,.l. In principle, 0.0 is stored in the memory area 7.2 before calculation begins, but for variables that are external inputs, external input values are stored.

(b) All input values used to calculate the subroutine use the values in memory area 7.2. As a method, when using the nth input of a certain subroutine, call the nth input variable name of that subroutine from memory area 2/110 input data, and the variable name is 7 Find out where in l it is stored. This location difference is determined by the value stored in the corresponding location in the memory area 7.2.

(C) All output values of the subroutine are stored in memory area 7.2. To store the m-th output of a subroutine in memory area 7.2, first select the name of the m-th output variable of that subroutine from among the input data in memory area 2.11. call,
The flow name is M, L +), x y F1,. 1
, 0□, □15.6. The output value is stored in the corresponding position of memory area 7.2 corresponding to the searched position.

In this way, the single output variable name is the key to passing calculated values between subroutines, and confusion must be prevented. The following items are required to identify input variable names. (a) Identification on the block flow sheet, (b) Identification as a physical variable. Therefore, the variable name is the flow name on the block flow sheet (a) above, and (b) the element characteristics sheet. Created by combining the variable names above (names on the variable list).

With this method, each input/output variable name of the subroutine has a unique name, so there is no possibility of making a mistake in passing calculated values. For example, consider a case where 70-F is connected from one subroutine A to another subroutine B.

Assume that one of the output variables of subroutine A is temperature CC), and the variable name on the element characteristic sheet is TC. At this time, if temperature (°C) is among the input variables of subroutine B, the temperature value calculated in subroutine A is naturally passed to subroutine B, but subroutine A
Even if there is a temperature ('C) in the element characteristic sheet of subroutine C that is not connected to subroutine A, the calculation results of subroutine A are not passed to subroutine C. The reason is that the output variable name FCT of subroutine A matches the input variable name FCT of subroutine B, but the input variable name of subroutine C does not become FCT because the flow name is not F.

Next, when the target plan)K recycle loop exists, which flow among the flows forming the loop should be set with an initial value for convergence calculation is selected and displayed on the display. As for the flow selection method, the method shown in the above-mentioned document "Computer Utilization Technology" can be used.

When the initial values for the convergence calculation are input from the tablet, the convergence calculation begins. As for the convergence calculation method, the method introduced in the above-mentioned literature can be used.

The calculation results are displayed for each subroutine as shown in FIG. This display shows that the input/output variable names, respective numbers, and calculated values of each subroutine are stored in memory area 2.
11 and memory area 71.2, it can be easily implemented. Note that the simulation results are stored in memory areas 71 and 7.2, but these are temporary core memories and cannot be recalled again. For this reason, memory areas 7.1 and 7. 2 is stored in memory areas 2 and 5 through the database management system 14.

F. Outputting calculation results to the input diagram The calculation results output for each subroutine are suitable for use as intermediate results of simulation, but
Insufficient for final preservation. The reasons for this are (1) input/output variable names and parameter names are given in English letters, making it difficult to understand what they physically mean; (11) For individual reasons, regarding (1) above, the calculation results will be displayed in the calculation input column and calculation output column of the element property sheet. Regarding (11) above, a process condition table showing the calculation results of the main flows is displayed at the bottom left of the block flow sheet.

(b) Output to the element characteristic sheet...The element characteristic sheet is stored in memory areas 2 and 9, and the calculation results are stored in memory area 2.5 through the database management system 14. It is. Therefore, in order to output the calculation results on the element characteristic sheet, the following processing may be performed. (a) Call up the element property sheet on the display. (b) Read the input/output variable names of the subroutine from memory areas 2-8, and read the calculated values corresponding to the variable names from memory areas 2-5. (C) Lightly display the read calculated value at the corresponding position on the element characteristic sheet.

(b) Output to flock flow sheet...
An overview of the process for displaying calculation results on the block flow sheet will be explained with reference to FIG.

In step 61, the components are sequentially called up on the display in accordance with the block flow sheet name specified by the designer. Move the frame of the block flow sheet to memory area 2. Call from lO.

Then, each position of the block used in the block flow sheet is read from memory area 2.l and drawn on the display. In the same way, each position of the flow is recalled from memory areas 2 and 3 and drawn on the display. Next, save the block name and flow name to memory area 2.
・Read from 2 and draw on the display. Step 6
In step 2, the position indicated by the designer with the stylus pen is read, and the flow name closest to that position is read. In step 63, the subroutine to which the flow is connected is searched, and the variable name is read from the element characteristic sheet. In step 64, the read variable name is searched for on the variable list and the process display field is referred to. If display is instructed, print the variable name (in Japanese) and unit on the process condition table. In step 65, the calculation results of the displayed variables are
Read from memory areas 2 and 5 and print at the corresponding location.

What should be noted here is to avoid confusion when recalling the calculation results when a plant with the same configuration is simulated under different conditions. For this reason, each time a simulation is performed, a case name is given for identification, and the simulation results are managed based on that name. Specifically, a unique name is given to a block flow sheet that is always used when performing a simulation, and the following data is accessed through the database management system 14 using that name as a key.

(a) Block data (memory area 2, 1),
(b) Character data (memory area 2, 2), (
C) Flow data (memory areas 2, 3),
(d) Parameters (memory areas 2., 4),
(e) Calculation results (Me) Sled Area 2,,,5),
(f) Element characteristic sheet (memory area 2, 9)
, (g) Simulation input data (memory area 2..11), (h) PFD (memory area 2..13)
), (i) Block flow sheet with calculation results (memory area 2..14) - As an example, the data structure of block data is shown in FIG.

Coat, block flow sheet name, sheet number, X
Address, followed by Y address. The names of block flow sheets simulated so far are stored in memory areas 2 and 6.

This information is used as a guide for searching when reviewing past simulation examples.

G. Creating a PFD (Process Flow Diagram) The process for creating a PFD is to replace the blocks on the block flow sheet with the symbol diagrams registered in the element characteristic sheet.

The process will be explained below with reference to FIG.

, Step 71 specifies the name of the block flow sheet and calls the block flow sheet. This process is the same as the process of calling a block flow sheet to write calculation results. Draw a layout mesh on the called block flow sheet. Next, in step 72, since the block to be replaced is indicated with the stylus pen, the name of the block closest to the indicated position of the pen is searched. Next, in step 73, from the element characteristic sheet of the searched block (memory area 2, .
9), reads the symbol number of that block. Next, data for drawing a symbol stored in memory areas 2 and 10 is searched based on the read symbol number. Furthermore, based on this data, a symbol diagram is drawn at the position specified by the stylus pen. That is, the mesh number is read from the indicated position of the stylus. This number means the position of the mesh when one section is divided into 12. Draw a symbol diagram at this location. However, instead of drawing on top of the block flow sheet screen, draw on the next screen. This screen is normally invisible due to the scissoring function of the graphic processing terminal device 13 (a function that lowers the brightness of only the signal portion that does not need to be displayed, making it invisible to the naked eye). In the next step 74, after drawing the symbol diagram, the mesh occupancy status occupied by the symbol diagram is displayed on the block flow sheet. The size of the symbol is set in three levels, with the smallest one being the size of one mesh, the middle one being the size of four meshes, and the largest being the size of nine meshes. Since the size of each symbol is stored in memory area 2.10, the size is read and the name of the block is written and hatched at the designated mesh number. However, when the size of the symbol is 4 meshes or 9 meshes, the symbol is arranged so that the designated mesh number is on the left corner. In step 76, when the arrangement of one screen of the symbol diagram is completed, the screen that has been made invisible by the scissoring function is called up and the symbol diagram is checked. If you wish to modify the shape and position of the symbol, do so through this screen. Next, input the flow for connecting the symbols using the tablet. Furthermore, the PFD screen is completed by assigning an identification number to the flow. Next, once you have finished drawing one screen, store the data for creating the screen (symbol number, placement position, etc.) in memory area 2 so that you can recall this screen at any time.
- Store in 12.

In step 78, in order to check the connection status between screens, processing is performed to display a certain screen and an adjacent screen in an integrated manner. In other words, when an instruction is given to move a four-column layout mesh to the left (or right) by n columns (where 1≦n≦3), the nth column on the screen that was being displayed is erased, and (4
-n) Move columns sequentially to the left (or right). Next, the n columns of the adjacent screens are moved to the blank mesh. These series of processes can be easily realized by managing each screen on a mesh-by-mesh basis and storing the creation order of each screen (memory areas 2 and 12).

Displaying a process flow sheet with an XY plotter requires drawing symbols and displaying simulation results. Information for drawing symbols is stored in memory.
The simulation results are stored in memory area 2 and 12.
The information is stored in areas 2 and 5, respectively, and these pieces of information are drawn at the corresponding positions on the process flow sheet. In other words, symbols are drawn so that one screen corresponds to the paper size (AQ or AI) of the block flow sheet, and the calculation results are displayed on the block flow sheet with financial results as they are in the process flow sheet. It should be displayed on the sheet.

Thus, in the present invention, input data is provided and visualized by block flow sheets and element characteristic sheets. As a result, input data errors are reduced by more than 90% compared to the conventional method. Furthermore, when performing a simulation, more than half of the time is often used to prepare for the simulation, that is, to search for documents of similar simulations and examine the results. However, in the present invention, all simulation results are stored in a memo IJ, and retrieval is extremely easy, so the simulation preparation period is reduced to 1/2 on average.
Reduced to 2. Additionally, vaporless engineering is possible, and the conventional effort of storing simulation result documents in a warehouse can be saved.

Furthermore, in the past, plant simulation and process flow diagram creation were considered separately, and process flow diagrams were created only after the simulation was completed. In general, the simulation and process flow diagram steps were serial. If these steps are performed in parallel, if the plant configuration is changed as a result of the simulation, there is a risk that the created process flow diagram may have to be completely reworked.

On the other hand, in the present invention, the simulation and the creation of the process flow diagram are carried out in parallel, and the completion of the simulation means that the process flow diagram is created.
It also measures the completion of the diagram. Therefore, if the period up to the creation of a process flow diagram is considered to be the period of plant design, the period will be shortened to about one-third of the conventional period.

〔Effect of the invention〕

As explained above, according to the present invention, the steady process
When using a simulator, input data errors are reduced, simulation preparation time is shortened, and simulation and process flow diagram creation are processed in parallel, which shortens plant design time and improves plant design. It is possible to achieve the same efficiency.

[Brief explanation of drawings]

Fig. 1 is a flowchart of a conventional simulation procedure, Fig. 2 is an overall block diagram of a control system showing an embodiment of the present invention, Fig. 3 is a flowchart of a simulation procedure of the present invention, and Fig. 4 is a flowchart of a simulation procedure according to the present invention. Figure 5 is the block flow sheet of the power generation plant just before the layout is completed, Figure 5 is the block flow sheet of the power generation plant showing the status of replacement with the symbol diagram, Figure 6 is the symbol diagram of the power generation plant immediately after block replacement, Figure 7 The figure is a processing flowchart for drawing a block flow sheet, Figure 8 is a simple block flow sheet, Figure 9 is a diagram showing input data corresponding to the block flow sheet in Figure 8,
Figure 0 is a processing flowchart for creating input data for the simulator, Figure 11 is a diagram showing the data structure for exchanging data between the blocks in Figure 9, and Figure 12 is a flowchart for creating input data for the simulator. A processing flowchart for displaying calculation results on a sheet, FIG. 13 is a diagram showing the data structure of block data, and FIG. 14 is a processing flowchart for creating a PFD. 11: host computer, 12: memory, 13: graphic processing terminal device, 14 = data base management system,
15: Graphic processing program, 16: Steady process simulator, 17: Core memory. (44) Figure 1 Simulation plan 1 Process flow sheet 2 Unit operation function formula model creation Figure 2 Figure 3 Figure-406- Figure 6 L −−−−−−−−
−−−−−−−−−−1−−−j Figure 8, Figure 9, Figure 10, Figure 11, Figure 12, Figure 14, Figure TART ■Replacement to read 210 block flow sheet with Louisout mesh from memory. Search for the indicated bronc 3 Replace the searched bronc with the symbol diagram 4 Display the screen occupancy status of the replaced symbol diagram 5 Symbol ↑ Explanation 6 Write the flow on the symbol diagram and make the necessary corrections 2. 12 Mori and Tsumineuchi

Claims (6)

[Claims] (1) In a computer system having a steady-state process simulator, a graphics processing terminal device, and a data pace management system, each device is blocked, and the IJ-me is expressed as a flow.・Draw a sheet on a tablet on a graphics processing terminal device, call up the element characteristic sheet representing specifications such as input/output variable names and calculation conditions for each device from the data pace management system, and record parameter values, external input values, etc. Calculation conditions are set on the tablet to create input data to the steady process simulator, and the display of the graphic processing terminal device is used to display simulation results on a process flow diagram using symbols. Plant design is characterized by creating a process flow diagram by registering the blocks of the block flow sheet displayed in the data pace management system and replacing them with symbol diagrams. Input/output method. (2) When creating the process flow diagram on another screen, the process flow diagram is created using a layout mesh that allows you to monitor the screen occupancy status of the process flow diagram without having to switch screens. An input/output method for drawings for plant design calculation according to claim 1. (3) In a computer system that has a steady process simulator, a graphic processing terminal device, and a data pace management system, a block flow sheet that represents each device as a block and a stream that flows between the devices as a flow is created as a graphic. A tablet (tuplet) on the processing terminal device is drawn, and an element characteristic sheet representing specifications such as input/output variable names and calculation conditions for each device is called from the above data/pace management system, and calculation conditions such as parameter values and external input values are displayed on the tablet. Set from above to create input data to the steady process simulator, and to identify multiple variables included in the flow, enter the flow name given on the block flow sheet and each variable. An input/output method for drawings for plant design calculations, characterized in that a variable name is created by combining a variable name representing a physical characteristic. (4) The created variable name is used as an important key when exchanging calculation data between valley blocks. Input/output method. (5) The block flow sheet is created using the distance between the center position coordinates of the block and the start point/end point position coordinates of the flow in order to search for connection relationships between blocks and flows. An input/output method for plant design calculation drawings according to claim 1 or 3. (6) Input/output of plant design calculation drawings according to claim 3, wherein the variable names representing the physical characteristics are collectively managed in order to be applied to a plurality of simulation cases. method.