CN107862439B - Method and device for determining smoothness of coal liquefaction device - Google Patents
Method and device for determining smoothness of coal liquefaction device Download PDFInfo
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Abstract
The invention discloses a method and a device for determining the smoothness of a coal liquefaction device. Wherein, the method comprises the following steps: determining at least one indicator of a coal liquefaction plant; performing data fitting on the parameter value of at least one index to obtain the index smoothness of the at least one index; determining a weight value of at least one index; and determining the smoothness of the coal liquefaction device according to the index smoothness of the at least one index and the weight value of the at least one index. The invention solves the technical problem that the operation condition of the coal liquefaction device cannot be accurately and effectively determined due to the fact that the stability of the coal liquefaction device cannot be accurately calculated in the prior art.
Description
Technical Field
The invention relates to the field of coal chemical industry, in particular to a method and a device for determining the smoothness of a coal liquefaction device.
Background
The refining enterprises mainly comprise coal refining enterprises and petroleum refining enterprises, and the long-term stable operation of the production devices of the refining enterprises brings huge economic benefits to the enterprises and is the target of the enterprise production pursuit. The device stability is a quantitative index for evaluating the running condition of the device and is an important content of enterprise process management. The operation condition of the device can be analyzed by calculating the smoothness of the device and then according to the smoothness of the device, wherein the smoothness of the device is determined according to a plurality of indexes of the device. Although some enterprises, such as Yanshan petrochemical companies, have been used to evaluate the operation of the device, the method for calculating the operation of the device by these enterprises cannot determine the smoothness of each index of the device, and further cannot accurately obtain the smoothness of the device, so that the operation of the device cannot be accurately and effectively reflected.
Aiming at the problem that the operation condition of the coal liquefaction device cannot be accurately and effectively determined due to the fact that the smoothness of the coal liquefaction device cannot be accurately calculated in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for determining the stability of a coal liquefaction device, which are used for at least solving the technical problem that the operation condition of the coal liquefaction device cannot be accurately and effectively determined due to the fact that the stability of the coal liquefaction device cannot be accurately calculated in the prior art.
According to an aspect of an embodiment of the present invention, there is provided a method of determining a smoothness of a coal liquefaction plant, including: determining at least one indicator of a coal liquefaction plant; performing data fitting on the parameter value of at least one index to obtain the index smoothness of the at least one index; determining a weight value of at least one index; and determining the smoothness of the coal liquefaction device according to the index smoothness of the at least one index and the weight value of the at least one index.
According to another aspect of the embodiments of the present invention, there is also provided an apparatus for determining the smoothness of a coal liquefaction plant, including: the index acquisition module is used for determining at least one index of the coal liquefaction device; the processing module is used for performing data fitting on the parameter value of at least one index to obtain the index stability of the at least one index; the weight obtaining module is used for determining the weight value of at least one index; and the stability obtaining module is used for determining the stability of the coal liquefaction device according to the index stability of the at least one index and the weight value of the at least one index.
In the embodiment of the invention, a data fitting mode is adopted, at least one index of the coal liquefaction device is determined, data fitting is carried out on a parameter value of the at least one index to obtain the index stability of the at least one index, then the weight value of the at least one index is determined, and finally the stability of the coal liquefaction device is determined according to the index stability of the at least one index and the weight value of the at least one index, so that the aim of accurately calculating the stability of the coal liquefaction device is fulfilled, the technical effect of accurately and effectively determining the operation condition of the coal liquefaction device is achieved, and the technical problem that the operation condition of the coal liquefaction device cannot be accurately and effectively determined due to the fact that the stability of the coal liquefaction device cannot be accurately calculated in the prior art is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of a method of determining the smoothness of a coal liquefaction plant in accordance with an embodiment of the present invention;
FIG. 2 is a flow diagram of an alternative method of determining the smoothness of a coal liquefaction plant in accordance with embodiments of the present invention;
FIG. 3 is a flow diagram of an alternative method of determining the smoothness of a coal liquefaction plant in accordance with embodiments of the present invention;
FIG. 4 is a flow diagram of an alternative method of determining the smoothness of a coal liquefaction plant in accordance with embodiments of the present invention;
FIG. 5 is a schematic illustration of an alternative trend curve according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an apparatus for determining the smoothness of a coal liquefaction plant in accordance with an embodiment of the present invention; and
FIG. 7 is a schematic diagram of an alternative apparatus for determining the smoothness of a coal liquefaction plant in accordance with embodiments of the present invention.
Wherein the figures include the following reference numerals:
601. an index acquisition module; 603. a processing module; 605. a weight obtaining module; 607. a stability obtaining module; 6011. a first acquisition module; 6013. a first adjusting module; 6015. a time acquisition module; 6017. a first judgment module; 6031. a second acquisition module; 6033. a first calculation module; 6051. building a module; 6053. a score acquisition module; 6055. a second calculation module; 60531. a third obtaining module; 60533. a second adjustment module; 60535. a fourth obtaining module; 60537. and a second judgment module.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or 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
According to an embodiment of the invention, an embodiment of a method for determining the smoothness of a coal liquefaction plant is provided.
Fig. 1 is a flowchart of a method for determining the smoothness of a coal liquefaction plant according to an embodiment of the present invention, as shown in fig. 1, the method including the steps of:
step S102, at least one index of the coal liquefaction device is determined.
In step S102, the coal liquefaction apparatus is used for processing a material (containing solid particles such as coal and catalyst) under high pressure or high temperature and hydrogenation, wherein the coal liquefaction apparatus may be a direct coal liquefaction apparatus.
In an alternative embodiment, the device stability of the direct coal liquefaction device is calculated, and the device stability is analyzed to obtain the operation condition of the device. The device stability of the direct coal liquefaction device is calculated by calculating the stability of each index in the direct coal liquefaction device and processing the stability of each index. The indexes of the direct coal liquefaction device refer to parameters which can cause certain influence on the reaction of the direct coal liquefaction device. Specifically, whether a certain parameter is an index of the direct coal liquefaction plant may be determined by the following method: and adjusting the value of the parameter within a certain range, acquiring the running time of the direct coal liquefaction device under the condition that the value of the parameter changes, finally judging whether the running time is within a preset range, and if so, determining that the parameter is an index of the direct coal liquefaction device.
It should be noted that the selection of the index of the direct coal liquefaction device needs to be targeted, that is, whether the selection of the index reasonably determines whether the smoothness of the direct coal liquefaction device can truly reflect the operation condition of the device.
In addition, it should be noted that the coal liquefaction device includes a plurality of parameters (for example, a temperature of the feeding pipe, a feeding amount of the pulverized coal, and the like), but not all of the parameters may be used as an index of the coal liquefaction device, and the index that may be used as the coal liquefaction device is a parameter that has a certain influence on a reaction of the coal liquefaction device.
Through the step S102, an index that has a certain influence on the reaction of the coal liquefaction apparatus may be selected from the parameters of the plurality of coal liquefaction apparatuses, and the stability of the coal liquefaction apparatus may be evaluated according to the index of the coal liquefaction apparatus.
And step S104, performing data fitting on the parameter value of the at least one index to obtain the index smoothness of the at least one index.
In an alternative embodiment, after the index of the direct coal liquefaction device is determined, a time-point operation value of the index is obtained, and the index stability of the index is calculated by using a mean square error formula according to the time-point operation value of the index and the number of the time-point operation values of the index. Specifically, the parameter values corresponding to the index are collected and stored at regular intervals (for example, 5 minutes) within a predetermined time period (for example, 0 to 9 points), the mean square error of the parameter values corresponding to the index within the time period is calculated by using a mean square error formula, and the index stability of the index is calculated according to the mean square error. The time point operation values are parameter values corresponding to the index collected at regular intervals in a preset time period, and the number of the time point operation values is the number of times of collecting the index parameter values in the preset time period.
It should be noted that the index smoothness obtained by the above calculation method is further weighted and summed to obtain the device smoothness of the coal liquefaction device. Because the index of the coal liquefaction device is a parameter which influences the coal liquefaction device, the running condition of the coal liquefaction device can be more accurately reflected by calculating the index stability of the coal liquefaction device and obtaining the device stability of the coal liquefaction device on the basis.
And step S106, determining the weight value of at least one index.
In an alternative embodiment, the weight value of each index is calculated by using an analytic hierarchy process (AHP process). The analytic hierarchy process is a decision process for decomposing elements related to decision into levels of target, criterion, scheme and the like, and carrying out qualitative and quantitative analysis on the basis. Specifically, an AHP software is used for modeling, a hierarchical structure diagram of the coal liquefaction device is constructed, experts in the field score the indexes, and then the weighted value of each index is obtained according to the constructed hierarchical structure diagram and the scoring result of the relevant indexes by the experts.
It should be noted that whether the weight value of the index is calculated reasonably plays an important role in evaluating whether the smoothness of the coal liquefaction device is reasonable. Since the calculation of the weight value of the index is determined by the scoring result of experts in the field, the determination of the weight value of the index is subjective, and sensitivity analysis needs to be performed on the obtained weight value. The sensitivity is used for representing whether the weight value of the index is sensitive, and the smaller the value of the sensitivity is, the less sensitive the weight value of the index is, namely, the stability is higher. Specifically, experts in the field change the scores of related indexes and obtain the weight values of the indexes, if the smile change of the indexes can cause large change of the corresponding weight values, the weight values of the indexes have large subjective influence, the weight values of the indexes need to be recalculated, and the influence caused by subjectivity can be reduced by the method.
The reasonable weight value of the coal liquefaction device index can be obtained through the step S106, and the weight value is introduced, so that the influence of which index or indexes on the operation of the coal liquefaction device is larger when the coal liquefaction device operates under the abnormal condition is reflected through the weight value of the index, various indexes of the coal liquefaction device can be adjusted according to theoretical calculation, and the stability of the coal liquefaction device can be further ensured to accurately and effectively reflect the operation condition of the device.
And S108, determining the stability of the coal liquefaction device according to the index stability of the at least one index and the weight value of the at least one index.
In step S108, after the index stability of at least one index and the weight value of at least one index are obtained, the index stability of the index is weighted, so as to obtain the device stability of the coal liquefaction device, specifically, the stability of the device may be calculated by the following formula:
in the above formula, S represents the smoothness of the coal liquefaction apparatus, N is at least one index number of the coal liquefaction apparatus, σiThe index smoothness, w, of the ith indexiIs the weighted value of the ith index.
After the device stability of the coal liquefaction device is obtained, the device stability of the coal liquefaction device needs to be analyzed, that is, the operation condition of the coal liquefaction device is determined according to the device stability of the coal liquefaction device.
Based on the solutions disclosed in steps S102 to S108 of the above embodiments, it can be known that the stability of the coal liquefaction apparatus is determined by determining at least one index of the coal liquefaction apparatus, and performing data fitting on a parameter value of the at least one index to obtain an index stability of the at least one index, then determining a weight value of the at least one index, and finally determining the stability of the coal liquefaction apparatus according to the index stability of the at least one index and the weight value of the one index, and it is easy to note that since the device stability of the coal liquefaction apparatus is obtained by performing weighting processing on each index after calculating the index stability of the coal liquefaction apparatus and the weight value of each index of the coal liquefaction apparatus, the index stability of the coal liquefaction apparatus and the weight value corresponding to each index play an important role in evaluating the operation condition of the coal liquefaction apparatus, and therefore, the present application ensures the rationality of selecting the weight value corresponding to each index through sensitivity analysis, the purpose of accurately calculating the stability of the coal liquefaction device is achieved, the technical effect of accurately and effectively determining the operation condition of the coal liquefaction device is achieved, and the technical problem that the operation condition of the coal liquefaction device cannot be accurately and effectively determined due to the fact that the stability of the coal liquefaction device cannot be accurately calculated in the prior art is solved.
Fig. 2 shows a flow chart of an alternative method for determining the smoothness of a coal liquefaction plant, and as shown in fig. 2, the method may determine at least one index of the coal liquefaction plant, and specifically includes the following steps:
step S202, acquiring at least one parameter of the coal liquefaction device during operation;
step S204, adjusting parameter values of each parameter based on a corresponding first preset rule;
step S206, acquiring the adjustment time consumed when the parameter value of each parameter is adjusted to the corresponding target value;
and S208, judging whether the adjusting time corresponding to each parameter meets the corresponding preset condition, wherein the parameter of which the adjusting time meets the corresponding preset condition is determined to be used as the index of the coal liquefaction device.
In the above steps S202 to S208, since the coal liquefaction device has a plurality of parameters, the operation of the coal liquefaction device is affected to a certain extent by changing the parameter value of each parameter, but the degree of the effect of each parameter is different. Therefore, experts in the field first eliminate some parameters of the coal liquefaction device which are not influenced much, and then adjust parameter values of other parameters according to a first preset rule to further determine the index of the coal liquefaction device. Wherein, the first preset rule that different parameters correspond is different, for example, to inlet pipe temperature, its first preset rule is: reducing the current temperature by 5 ℃, then increasing the reduced temperature by 5 ℃, and recording the adjustment time of the process; and for the feeding amount of the pulverized coal, the first preset rule is as follows: firstly increasing 10t/h (namely 110t/h) on the basis of the current coal powder feeding amount (for example, 100t/h), then increasing 10t/h (namely 120t/h) on the basis of the current coal powder feeding amount, and finally increasing 5t/h (namely 125t/h) on the basis of the current coal powder feeding amount, and recording the adjustment time of the process. Table 1 shows the correspondence between each parameter and its adjustment time under the corresponding first preset rule.
TABLE 1
In table 1, the adjustment times of the concentrations of the three kneaders 103A, 103B and 103C described above were considered to be uniform.
It should be noted that the preset conditions corresponding to different parameters are also different, for example, for the temperature of the feed pipe, if the corresponding preset condition is that the adjustment time is not less than 15min, the adjustment time corresponding to the temperature of the feed pipe meets the preset condition, and therefore, the temperature of the feed pipe can be used as an index of the coal liquefaction device; and the preset condition corresponding to the coal powder feeding amount is that the adjusting time is not less than 10 minutes, and if the adjusting time corresponding to the coal powder feeding amount is 8 minutes, the coal powder feeding amount cannot be used as the index of the coal liquefaction device.
Optionally, the data fitting of the parameter value of the at least one index to obtain the index smoothness of the at least one index includes the following steps:
step S30, obtaining a parameter value of at least one index in a predetermined time, wherein the parameter value includes: the running value of the at least one index, the mean value of the running values of the at least one index and the number of the running values of the at least one index are used for representing the numerical value of the at least one index when the coal liquefaction device runs;
step S32, determining the index smoothness of at least one index according to the parameters of at least one index by the following formula:
wherein σ is the index smoothness of at least one index, M is the number of the operation values of at least one index, xiFor the operating value of the ith at least one indicator,
is the mean of the running values of the at least one indicator.
In steps S30 to S32, the operation value of the index is a time point operation value of the index, and the average value of the operation values of the index
Calculated by the following formula:
the number M of the operation values of the index can be obtained by the following formula:
in the above formula, T is the statistical duration of the stationarity, and is counted according to the class duration, where the unit is min, and f is the value time interval of each index, and the unit is min. The time interval may be 5min, that is, the parameter value corresponding to the index is obtained every 5 minutes. When the shift time is 7 shifts, and the value time interval is 5min, the effective operation number M of the indexes is as follows:
fig. 3 shows a flowchart of an optional method for determining the smoothness of a coal liquefaction plant, and as shown in fig. 3, the method may determine a weight value of at least one indicator, and specifically includes the following steps:
step S302, constructing a hierarchical structure diagram according to an analytic hierarchy process, wherein the hierarchical structure diagram comprises: the top layer, the middle layer and the bottom layer, wherein the middle layer is used for representing the relation between at least one index;
step S304, determining the evaluation score of at least one index;
and S306, obtaining the weight value of at least one index according to the hierarchical structure chart and the evaluation score of at least one index.
In the scenario defined in steps S302 to S306, the AHP software (i.e., the analytic hierarchy process software) may construct a hierarchical structure diagram according to the analytic hierarchy process, wherein the hierarchical structure diagram is divided into a top layer, a middle layer and a bottom layer, the top layer includes a purpose of solving the problem, the middle layer includes various measures to be taken to achieve the overall goal and criteria that the scenario must follow, and may also be referred to as a policy layer, a constraint layer or a criteria layer, and the bottom layer includes various measures, scenarios, etc. for solving the problem. By using the hierarchical structure diagram, various factors to be considered are placed in a proper hierarchy, and the relationship among the factors can be clearly expressed by using the hierarchical structure.
In an optional embodiment, an expert in the art determines an evaluation score of each index, and inputs the evaluation score into AHP software, and the AHP software can obtain a weight value corresponding to each index according to the evaluation score determined by the expert and a relationship between the indexes in the hierarchical structure diagram, for example, the weights corresponding to the feed pipe temperature, the catalyst addition amount, the coal slurry concentration, the coal powder feed amount, the hydrogenation flow rate, and the reaction pressure obtained by the above method are:
W＝(0.4457，0.1122，0.0733，0.2349，0.0793，0.0547)
it should be noted that, since the weight value corresponding to each index is based on the evaluation score of the expert, the obtained index weight value has a certain subjectivity, and in order to reduce the influence of the subjective factor on the evaluation of the device smoothness, it is also necessary to perform sensitivity analysis on the obtained index weight value, that is, to obtain an evaluation score suitable for the index through sensitivity analysis, and further obtain the weight value corresponding to the index.
Fig. 4 shows a flowchart of an alternative method for determining the smoothness of a coal liquefaction plant, and as shown in fig. 4, the method may determine an evaluation score of at least one index, and specifically includes the following steps:
step S402, acquiring a preset evaluation score of at least one index;
step S404, adjusting a preset evaluation score based on a corresponding second rule by each index;
step S406, acquiring a weight value when the preset evaluation score of each index is adjusted to a corresponding score value;
step S408, determining whether the weighted value corresponding to each index satisfies a corresponding determination condition, wherein a preset evaluation score for which the weighted value satisfies the corresponding determination condition is determined as an evaluation score of at least one index.
In the scheme defined in steps S402 to S408, the preset evaluation score is an evaluation score input by an expert in the field in the AHP software, and the expert may adjust the preset evaluation score according to the second rule, where the second rules corresponding to different indexes are different, specifically, the adjustment ranges of the preset evaluation score by the expert are different in the process of adjusting the preset evaluation score, for example, the minimum adjustment range of the preset evaluation score by the expert for the feed pipe temperature is 0.05, and the minimum adjustment range of the preset evaluation score corresponding to the coal powder feeding amount is 0.05. If the expert adjusts the preset evaluation score of the index, and the weight value of the index is changed greatly, the weight value is not considered to be the final weight value, and the expert needs to input the preset evaluation score again to obtain a new weight value.
Optionally, the smoothness of the coal liquefaction plant is determined by the following formula:
wherein S is the smoothness of the coal liquefaction device, N is the number of at least one index, and σ isiAs the i-th index
Smoothness of the index, wiIs the weighted value of the ith index.
In a preferred embodiment, after obtaining the plant stability of the coal liquefaction plant, it is also necessary to analyze the plant stability of the plant.
Firstly, a standard value is obtained to judge whether the current device is normal in operation, and the specific method is as follows:
step S50, selecting data of each index under the device operation condition;
s52, screening out data higher than the alarm value, and fitting the data, wherein the data higher than the alarm value is normal data;
in step S54, an alarm value is artificially added, and fitting processing is performed again on the data after the alarm value is added.
The following three fitting results were obtained for the three steps:
the device flatness obtained by fitting the data through step S50 was 0.0892, the decorated flatness was 0.0418 obtained through step S52, and the relationship between the alarm values added at different ratios and the device flatness shown in table 2 was obtained through step S54, as shown in table 2.
TABLE 2
| Alarm value addition ratio | Stability of the device |
| 2/12 | 0.1400 |
| 3/12 | 0.1400 |
| 4/12 | 0.1400 |
| 4/12 | 0.1419 |
| 6/12 | 0.1419 |
A schematic diagram of a trend curve of the stability along with the addition proportion of the alarm value, which is shown in fig. 5, is drawn according to table 2, and it can be seen from table 2 and fig. 5 that when the proportion of the alarm value is 3/12, the stability of the device is 0.1425; when the ratio of the added alarm values is 4/12, the device smoothness is 0.1427, with a difference of 0.0002, which can be considered equal. Whereas the device smoothness was 0.1419 when the 5/12 alarm value was added, i.e. the maximum value of the device smoothness occurred between 4/12 and 5/12 but closer to 4/12 after the alarm value was added. The smaller the device stability calculated by using the mean square error is, the better the device stability is, and after the proportion of the added alarm value is 4/12, the device stability is smaller and smaller, but this does not mean that the later device stability is credible, and the value is defined by the mean square error to represent the fluctuation situation, and with the subsequent addition of a large amount of alarm values, the data is gradually replaced by the alarm values to obtain a group of data with high alarm values, and the fluctuation between the alarm data is smaller, so that the situation is presented. This is not possible because the operation of the device is detected as abnormal by the calculation of the smoothness of the device before a high alarm value occurs. Therefore, the following conclusions are drawn from the analysis of the above three fitting results: when the smoothness of the device reaches 0.1, the coal liquefaction device is not operated normally.
Example 2
According to an embodiment of the present invention, an embodiment of an apparatus for determining the smoothness of a coal liquefaction apparatus is provided, wherein the method in the above embodiment 1 may be operated in the apparatus provided in this embodiment.
Fig. 6 is a schematic structural diagram of an apparatus for determining the smoothness of a coal liquefaction apparatus according to an embodiment of the present invention, and as shown in fig. 6, the apparatus includes: an index obtaining module 601, a processing module 603, a weight obtaining module 605 and a smoothness obtaining module 607.
The index obtaining module 601 is configured to determine at least one index of the coal liquefaction apparatus.
In the index obtaining module 601, the coal liquefaction device is used for processing a material (containing solid particles such as coal and catalyst) under high pressure or high temperature and hydrogenation conditions, wherein the coal liquefaction device may specifically be a direct coal liquefaction device.
In an alternative embodiment, the device stability of the direct coal liquefaction device is calculated, and the device stability is analyzed to obtain the operation condition of the device. The device stability of the direct coal liquefaction device is calculated by calculating the stability of each index in the direct coal liquefaction device and processing the stability of each index. The indexes of the direct coal liquefaction device refer to parameters which can cause certain influence on the reaction of the direct coal liquefaction device. Specifically, whether a certain parameter is an index of the direct coal liquefaction plant may be determined by the following method: and adjusting the value of the parameter within a certain range, acquiring the running time of the direct coal liquefaction device under the condition that the value of the parameter changes, finally judging whether the running time is within a preset range, and if so, determining that the parameter is an index of the direct coal liquefaction device.
It should be noted that the selection of the index of the direct coal liquefaction device needs to be targeted, that is, whether the selection of the index reasonably determines whether the smoothness of the direct coal liquefaction device can truly reflect the operation condition of the device.
In addition, it should be noted that the coal liquefaction device includes a plurality of parameters (for example, a temperature of the feeding pipe, a feeding amount of the pulverized coal, and the like), but not all of the parameters may be used as an index of the coal liquefaction device, and the index that may be used as the coal liquefaction device is a parameter that has a certain influence on a reaction of the coal liquefaction device.
Through the index acquisition module 601, indexes which have certain influence on the reaction of the coal liquefaction device can be selected from the parameters of the coal liquefaction devices, and then the smoothness of the coal liquefaction device can be evaluated according to the indexes of the coal liquefaction device.
The processing module 603 is configured to perform data fitting on the parameter value of the at least one index to obtain the index smoothness of the at least one index.
In an alternative embodiment, after the index of the direct coal liquefaction device is determined, a time-point operation value of the index is obtained, and the index stability of the index is calculated by using a mean square error formula according to the time-point operation value of the index and the number of the time-point operation values of the index. Specifically, the parameter values corresponding to the index are collected and stored at regular intervals (for example, 5 minutes) within a predetermined time period (for example, 0 to 9 points), the mean square error of the parameter values corresponding to the index within the time period is calculated by using a mean square error formula, and the index stability of the index is calculated according to the mean square error. The time point operation values are parameter values corresponding to the index collected at regular intervals in a preset time period, and the number of the time point operation values is the number of times of collecting the index parameter values in the preset time period.
It should be noted that the index smoothness obtained by the above calculation method is further weighted and summed to obtain the device smoothness of the coal liquefaction device. Because the index of the coal liquefaction device is a parameter which influences the coal liquefaction device, the running condition of the coal liquefaction device can be more accurately reflected by calculating the index stability of the coal liquefaction device and obtaining the device stability of the coal liquefaction device on the basis.
A weight obtaining module 605, configured to determine a weight value of at least one indicator.
In an alternative embodiment, the weight value of each index is calculated by using an analytic hierarchy process (AHP process). The analytic hierarchy process is a decision process for decomposing elements related to decision into levels of target, criterion, scheme and the like, and carrying out qualitative and quantitative analysis on the basis. Specifically, an AHP software is used for modeling, a hierarchical structure diagram of the coal liquefaction device is constructed, experts in the field score the indexes, and then the weighted value of each index is obtained according to the constructed hierarchical structure diagram and the scoring result of the relevant indexes by the experts.
It should be noted that whether the weight value of the index is calculated reasonably plays an important role in evaluating whether the smoothness of the coal liquefaction device is reasonable. Since the calculation of the weight value of the index is determined by the scoring result of experts in the field, the determination of the weight value of the index is subjective, and sensitivity analysis needs to be performed on the obtained weight value. The sensitivity is used for representing whether the weight value of the index is sensitive, and the smaller the value of the sensitivity is, the less sensitive the weight value of the index is, namely, the stability is higher. Specifically, experts in the field change the scores of related indexes and obtain the weight values of the indexes, if the smile change of the indexes can cause large change of the corresponding weight values, the weight values of the indexes have large subjective influence, the weight values of the indexes need to be recalculated, and the influence caused by subjectivity can be reduced by the method.
The weight obtaining module 605 can obtain a reasonable weight value of the indexes of the coal liquefaction device, and since the weight value is introduced, the influence of which index or indexes on the operation of the coal liquefaction device is relatively large when the coal liquefaction device operates under an abnormal condition is reflected by the weight value of the indexes, so that each index of the coal liquefaction device can be adjusted according to theoretical calculation, and the stability of the coal liquefaction device can be further ensured to accurately and effectively reflect the operation condition of the device.
The stability obtaining module 607 is configured to determine the stability of the coal liquefaction apparatus according to the index stability of the at least one index and the weight value of the at least one index.
In the stability obtaining module 607, after the index stability of at least one index and the weight value of at least one index are obtained, the index stability of the index is weighted, and then the device stability of the coal liquefaction device can be obtained, specifically, the stability of the device can be calculated by the following formula:
in the above formula, S represents the smoothness of the coal liquefaction apparatus, N is at least one index number of the coal liquefaction apparatus, σiThe index smoothness, w, of the ith indexiIs the weighted value of the ith index.
After the device stability of the coal liquefaction device is obtained, the device stability of the coal liquefaction device needs to be analyzed, that is, the operation condition of the coal liquefaction device is determined according to the device stability of the coal liquefaction device.
It can be known from the above that, by determining at least one index of the coal liquefaction device and performing data fitting on a parameter value of the at least one index, the index stability of the at least one index is obtained, then determining a weight value of the at least one index, and finally determining the stability of the coal liquefaction device according to the index stability of the at least one index and the weight value of one index, it is easy to note that since the weight processing is performed on each index after the index stability of the coal liquefaction device and the weight value of each index of the coal liquefaction device are calculated, the device stability of the coal liquefaction device is obtained, therefore, the index stability of the coal liquefaction device and the weight value corresponding to each index play an important role in evaluating the operation condition of the coal liquefaction device, and therefore, the present application ensures the rationality of selecting the weight value corresponding to each index through sensitivity analysis, the purpose of accurately calculating the stability of the coal liquefaction device is achieved, the technical effect of accurately and effectively determining the operation condition of the coal liquefaction device is achieved, and the technical problem that the operation condition of the coal liquefaction device cannot be accurately and effectively determined due to the fact that the stability of the coal liquefaction device cannot be accurately calculated in the prior art is solved.
It should be noted that the index obtaining module 601, the processing module 603, the weight obtaining module 605 and the smoothness obtaining module 607 correspond to steps S102 to S108 in embodiment 1, and the four modules are the same as the corresponding steps in the implementation example and application scenario, but are not limited to the disclosure in embodiment 1.
Optionally, as shown in fig. 6, the index obtaining module 601 includes: a first obtaining module 6011, a first adjusting module 6013, a time obtaining module 6015, and a first determining module 6017. The first obtaining module 6011 is configured to obtain at least one parameter of the coal liquefaction apparatus during operation; the first adjusting module 6013 is configured to adjust a parameter value of each parameter based on a corresponding first preset rule; the time obtaining module 6015 is configured to obtain an adjustment time consumed when a parameter value of each parameter is adjusted to a corresponding target value; the first determining module 6017 is configured to determine whether the adjustment time corresponding to each parameter meets a corresponding preset condition, where a parameter whose adjustment time meets the corresponding preset condition is determined as an index of the coal liquefaction apparatus.
It should be noted that the first obtaining module 6011, the first adjusting module 6013, the time obtaining module 6015, and the first determining module 6017 correspond to steps S202 to S208 in embodiment 1, and the four modules are the same as the corresponding steps in the implementation example and the application scenario, but are not limited to the disclosure in embodiment 1.
Optionally, as shown in fig. 6, the processing module 603 includes: a second obtaining module 6031 and a first calculating module 6033. The second obtaining module 6031 is configured to obtain a parameter value of at least one indicator in a predetermined time, where the parameter value includes: the running value of the at least one index, the mean value of the running values of the at least one index and the number of the running values of the at least one index are used for representing the numerical value of the at least one index when the coal liquefaction device runs; the first calculating module 6033 is configured to determine the indicator smoothness of the at least one indicator according to the parameter of the at least one indicator by the following formula:
wherein σ is the index smoothness of at least one index, M is the number of the operation values of at least one index, xiFor the operating value of the ith at least one indicator,
is the mean of the running values of the at least one indicator.
Optionally, as shown in fig. 6, the weight obtaining module 605 includes: a construction module 6051, a score acquisition module 6053, and a second calculation module 6055. The constructing module 6051 is configured to construct a hierarchical structure diagram according to an analytic hierarchy process, where the hierarchical structure diagram includes: the top layer, the middle layer and the bottom layer, wherein the middle layer is used for representing the relation between at least one index; a score obtaining module 6053 for determining an evaluation score of at least one index; and a second calculating module 6055, configured to obtain a weight value of the at least one indicator according to the hierarchical structure diagram and the evaluation score of the at least one indicator.
It should be noted that the building module 6051, the score obtaining module 6053 and the second calculating module 6055 correspond to steps S302 to S306 in embodiment 1, and the three modules are the same as the corresponding steps in the example and the application scenario, but are not limited to the disclosure in embodiment 1.
Optionally, fig. 7 shows a schematic structural diagram of an optional device for determining the smoothness of the coal liquefaction device, and as shown in fig. 7, the score obtaining module 6053 includes: a third acquisition module 60531, a second adjustment module 60533, a fourth acquisition module 60535, and a second decision module 60537. The third obtaining module 60531 is configured to obtain a preset evaluation score of at least one index; the second adjusting module 60533 is used for adjusting the preset evaluation score based on the corresponding second rule for each index; the fourth obtaining module 60535 is configured to obtain a weight value when the preset evaluation score of each indicator is adjusted to a corresponding score value; the second judging module 60537 is configured to judge whether the weighted value corresponding to each index meets the corresponding judging condition, where a preset evaluation score that the weighted value meets the corresponding judging condition is determined as an evaluation score of at least one index.
It should be noted that the third obtaining module 60531, the second adjusting module 60533, the fourth obtaining module 60535 and the second determining module 60537 correspond to steps S402 to S408 in embodiment 1, and the four modules are the same as the corresponding steps in the implementation example and application scenarios, but are not limited to the disclosure in embodiment 1.
Optionally, the smoothness of the coal liquefaction plant is determined by the following formula:
wherein S is the smoothness of the coal liquefaction device, N is the number of at least one index, and σ isiThe index smoothness, w, of the ith indexiWeighted value of i-th index。
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A method of determining the smoothness of a coal liquefaction plant, comprising:
determining at least one indicator of a coal liquefaction plant;
performing data fitting on the parameter value of the at least one index to obtain the index smoothness of the at least one index;
determining a weight value of the at least one indicator;
determining the smoothness of the coal liquefaction device according to the index smoothness of the at least one index and the weight value of the at least one index;
wherein determining at least one indicator of the coal liquefaction plant comprises: acquiring at least one parameter of the coal liquefaction device during operation; each parameter is adjusted based on a corresponding first preset rule; acquiring the adjustment time consumed when the parameter value of each parameter is adjusted to the corresponding target value; and judging whether the adjusting time corresponding to each parameter meets the corresponding preset condition, wherein the parameter of which the adjusting time meets the corresponding preset condition is determined to be used as the index of the coal liquefaction device.
2. The method of claim 1, wherein fitting data to the parameter values of the at least one indicator to obtain an indicator flatness of the at least one indicator comprises:
obtaining a parameter value of the at least one index in a predetermined time, wherein the parameter value comprises: the operation value of the at least one index, the mean value of the operation values of the at least one index and the number of the operation values of the at least one index, wherein the operation value of the at least one index is used for representing the numerical value of the at least one index when the coal liquefaction plant operates;
determining an indicator smoothness of the at least one indicator according to the parameter of the at least one indicator by the following formula:
wherein σ is the index smoothness of the at least one index, M is the number of the operation values of the at least one index, xiFor the operation value of the ith said at least one indicator,
is the mean of the operating values of the at least one indicator.
3. The method of claim 2, wherein determining the weight value for the at least one indicator comprises:
constructing a hierarchical structure diagram according to an analytic hierarchy process, wherein the hierarchical structure diagram comprises: the top layer, the middle layer and the bottom layer, wherein the middle layer is used for representing the relation between the at least one index;
determining an evaluation score of the at least one indicator;
and obtaining the weight value of the at least one index according to the hierarchical structure chart and the evaluation score of the at least one index.
4. The method of claim 3, wherein determining an evaluation score for the at least one indicator comprises:
acquiring a preset evaluation score of the at least one index;
each index adjusts the preset evaluation score based on a corresponding second rule;
acquiring a weight value when the preset evaluation score of each index is adjusted to a corresponding score value;
and judging whether the weighted value corresponding to each index meets the corresponding judgment condition, wherein a preset evaluation score of which the weighted value meets the corresponding judgment condition is determined as the evaluation score of the at least one index.
5. The method of claim 3, wherein the smoothness of the coal liquefaction plant is determined by the formula:
wherein S is the smoothness of the coal liquefaction device, N is the number of the at least one index, and σ isiThe smoothness of the index, w, of the ith indexiThe weight value of the ith index.
6. An apparatus for determining the smoothness of a coal liquefaction plant, comprising:
the index acquisition module is used for determining at least one index of the coal liquefaction device;
the processing module is used for performing data fitting on the parameter value of the at least one index to obtain the index smoothness of the at least one index;
the weight obtaining module is used for determining the weight value of the at least one index;
the stability obtaining module is used for determining the stability of the coal liquefaction device according to the index stability of the at least one index and the weight value of the at least one index;
wherein, the index acquisition module comprises: the first acquisition module is used for acquiring at least one parameter of the coal liquefaction device during operation; the first adjusting module is used for adjusting the parameter value of each parameter based on a corresponding first preset rule; a time obtaining module, configured to obtain adjustment time consumed when the parameter value of each parameter is adjusted to the corresponding target value; and the first judging module is used for judging whether the adjusting time corresponding to each parameter meets the corresponding preset condition, wherein the parameter of which the adjusting time meets the corresponding preset condition is determined to be used as the index of the coal liquefaction device.
7. The apparatus of claim 6, wherein the processing module comprises:
a second obtaining module, configured to obtain a parameter value of the at least one indicator in a predetermined time, where the parameter value includes: the operation value of the at least one index, the mean value of the operation values of the at least one index and the number of the operation values of the at least one index, wherein the operation value of the at least one index is used for representing the numerical value of the at least one index when the coal liquefaction plant operates;
a first calculating module, configured to determine an indicator smoothness of the at least one indicator according to the parameter of the at least one indicator by using the following formula:
wherein σ is the index smoothness of the at least one index, M is the number of the operation values of the at least one index, xiFor the operation value of the ith said at least one indicator,
is the mean of the operating values of the at least one indicator.
8. The apparatus of claim 6, wherein the weight obtaining module comprises:
the construction module is used for constructing a hierarchical structure diagram according to an analytic hierarchy process, wherein the hierarchical structure diagram comprises: the top layer, the middle layer and the bottom layer, wherein the middle layer is used for representing the relation between the at least one index;
a score acquisition module for determining an evaluation score of the at least one index;
and the second calculation module is used for obtaining the weight value of the at least one index according to the hierarchical structure chart and the evaluation score of the at least one index.
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| CN203474720U (en) * | 2013-09-27 | 2014-03-12 | 神华集团有限责任公司 | Direct coal liquefaction device |
| CN106709654A (en) * | 2016-12-28 | 2017-05-24 | 中南大学 | Global operating condition evaluating and quality tracing method for hydrocracking process |
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| CN101987963A (en) * | 2009-07-31 | 2011-03-23 | 石其贵 | Application technology for converting coke oven gas into gasoline |
| CN203474720U (en) * | 2013-09-27 | 2014-03-12 | 神华集团有限责任公司 | Direct coal liquefaction device |
| CN106709654A (en) * | 2016-12-28 | 2017-05-24 | 中南大学 | Global operating condition evaluating and quality tracing method for hydrocracking process |
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