CN111125607B - Emission control method and device for volatile organic compounds in oil storage warehouse - Google Patents

Emission control method and device for volatile organic compounds in oil storage warehouse Download PDF

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CN111125607B
CN111125607B CN201911295644.7A CN201911295644A CN111125607B CN 111125607 B CN111125607 B CN 111125607B CN 201911295644 A CN201911295644 A CN 201911295644A CN 111125607 B CN111125607 B CN 111125607B
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substances
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CN111125607A (en
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刁宇
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张栋
刘朝阳
田望
程诚
李荣光
李静
孙玲
郝一博
徐丽
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Petrochina Co Ltd
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Abstract

The disclosure provides an emission control method and device for an oil reservoir, and relates to the field of petroleum and petrochemical industry. The method can firstly acquire the concentration of various substances discharged by the oil storage, and a plurality of discharge levels corresponding to each substance, secondly acquire the evaluation weight according to the representative value of each concentration interval represented by the plurality of discharge levels of each substance, and determine the membership information of each substance according to the concentration and the discharge level of each substance, and then determine the discharge level of VOCs discharged by the oil storage according to the evaluation weight and the membership information of each substance, and finally control the discharge amount of volatile organic compounds based on the determined discharge level so as to optimize the discharge of the VOCs in the oil storage and effectively reduce the influence of the VOCs discharged by the oil storage on the environment.

Description

Emission control method and device for volatile organic compounds in oil storage warehouse
Technical Field
The disclosure relates to the field of petroleum and petrochemical industry, in particular to a method and a device for controlling emission of volatile organic compounds in an oil reservoir.
Background
Volatile organic compounds (volatile organic compounds, VOCs) are fine particulate matter (PM 2.5) and ozone (O) 3 ) Is a precursor of (a). I.e. VOCs are purified by a series of reactions (e.g. light, condensation and oxygenFormed), PM2.5 and O can be formed 3 . PM2.5 and O 3 Can cause air pollution and influence the health of human bodies.
The oil reservoir is used as one of emission sources of VOCs emission, and the emission intensity of the VOCs in the oil reservoir can be reduced only through some standard specifications at present. However, at present, the emission of VOCs emitted from the oil storage can not be effectively evaluated, the emission level of VOCs can not be obtained, and the VOCs emitted from the oil storage may cause great pollution to the environment. Therefore, there is a need for a method of controlling the discharge of VOCs from a reservoir to obtain the discharge level of VOCs discharged from the reservoir, and controlling the discharge amount of volatile organic compounds from the reservoir based on the discharge level to optimize the discharge of VOCs from the reservoir.
Disclosure of Invention
The disclosure provides a method and a device for controlling emission of volatile organic compounds in an oil storage warehouse, which can solve the problem that the emission level of the volatile organic compounds cannot be obtained in the related art. The technical scheme is as follows:
in one aspect, a method for controlling emission of volatile organic compounds from an oil reservoir is provided, the method comprising:
obtaining a concentration of a plurality of substances discharged from the reservoir, the concentration of the plurality of substances including: the volatile organic compound and at least one component contained in the volatile organic compound;
Obtaining a plurality of emission levels corresponding to each substance, wherein each emission level is used for representing one concentration interval of the corresponding substance, and two concentration intervals represented by any two adjacent emission levels are intersected;
for each substance, acquiring an evaluation weight of the substance based on representative values of concentration intervals characterized by a plurality of emission levels, wherein the representative value of a first concentration interval is an endpoint value positioned in the first concentration interval in second concentration, the first concentration interval is any concentration interval in a plurality of concentration intervals corresponding to the emission levels of the substance, and the emission level corresponding to the first concentration interval is adjacent to the emission level corresponding to the second concentration interval;
determining, for each of the substances, membership information of the substance based on a concentration of the substance and a corresponding plurality of emission levels, the membership information being used to characterize membership of the concentration of the substance to respective concentration intervals characterized by the corresponding plurality of emission levels, wherein the membership of the concentration of the substance to the concentration intervals is inversely related to an absolute value of a difference between the concentration of the substance and a representative value of the concentration interval;
Determining an emission level of volatile organic compounds emitted from the reservoir based on the evaluation weight of each of the plurality of substances and the membership information of each of the substances;
and controlling the emission amount of the volatile organic compounds based on the emission level of the volatile organic compounds emitted by the oil reservoir.
Optionally, for each of the substances, obtaining an evaluation weight of the substance based on representative values of respective concentration intervals characterized by a corresponding plurality of emission levels, including:
for each of the substances, calculating an initial weight of the substance using a first weight calculation formula based on representative values of respective concentration intervals characterized by a plurality of emission levels corresponding to the substance;
calculating an evaluation weight of each of the plurality of substances using a second weight calculation formula based on the initial weight of each of the plurality of substances;
wherein the first weight calculation formula satisfies:
the second weight calculation formula satisfies:
wherein the variety of the substances is n, and w is as follows i An initial weight of an ith species of the plurality of species, the x i Is the ith species Concentration of mass, z i An average value of representative values of each concentration interval characterized by a plurality of emission levels corresponding to the ith species, theThe evaluation weight of the i-th substance in the plurality of substances.
Optionally, the plurality of emission levels includes: three emission levels; for each of the substances, determining membership information for the substance based on the concentration of the substance and a corresponding plurality of emission levels, comprising:
for each substance, determining the membership of the concentration of the substance to three concentration intervals characterized by the three emission levels by adopting a membership calculation formula based on the concentration of the substance and the corresponding three emission levels;
the membership calculation formula satisfies the following conditions:
wherein the A 1i (x) A degree of membership of an ith species of the plurality of species to a concentration interval characterized by a first of the three emission levels, the A 2i (x) A degree of membership of the ith species to a concentration interval characterized by a second of the three emission levels, the A 3i (x) A degree of membership of the ith species to a concentration interval characterized by a third of the three emission levels, the x i For the concentration of the i-th substance, a is a representative value of a concentration interval characterized by the first emission level, b is a representative value of a concentration interval characterized by the second emission level, and c is a representative value of a concentration interval characterized by the third emission level.
Optionally, determining the emission level of the volatile organic compounds emitted from the oil reservoir based on the evaluation weight of each of the plurality of substances and the membership information of each of the substances includes:
determining an evaluation weight matrix based on the evaluation weight of each of the plurality of substances;
determining a membership matrix based on membership information of each of the plurality of substances;
calculating an evaluation set based on the evaluation weight matrix and the membership matrix by adopting an evaluation function, wherein the evaluation set comprises a plurality of evaluation results which are in one-to-one correspondence with a plurality of emission levels;
determining an emission level corresponding to the maximum value of the evaluation results in the evaluation set as the emission level of the volatile organic compounds emitted by the oil reservoir;
the evaluation function satisfies:
B＝W·R＝[b 1 b 2 … b i … b m ]；
wherein the number of the emission levels is m, B is the evaluation set, W is the evaluation weight matrix, R is the membership matrix, and B i Is the evaluation result corresponding to the i-th emission level.
Optionally, controlling the emission amount of the volatile organic compounds based on the emission level of the volatile organic compounds emitted from the oil reservoir includes:
and determining an emission mode of an emission control device based on the emission level of the volatile organic compounds emitted from the oil reservoir, and controlling the emission amount of the volatile organic compounds by the emission control device.
In another aspect, there is provided an emission control device for volatile organic compounds of an oil reservoir, the device comprising:
a first acquisition module for acquiring the concentration of a plurality of substances discharged from the oil reservoir, the concentration of the plurality of substances including: the concentration of the volatile organic compound, and the concentration of at least one component contained in the volatile organic compound;
the second acquisition module is used for acquiring a plurality of emission levels corresponding to each substance, wherein each emission level is used for representing one concentration interval of the corresponding substance, and two concentration intervals represented by any adjacent emission levels are intersected;
a third obtaining module, configured to obtain, for each of the substances, an evaluation weight of the substance based on representative values of concentration intervals represented by a plurality of emission levels corresponding thereto, where the representative value of a first concentration interval is an endpoint value located in the first concentration interval in a second concentration interval, the first concentration interval is any one of concentration intervals corresponding to a plurality of emission levels corresponding to the substance, and the emission level corresponding to the first concentration interval is adjacent to the emission level corresponding to the second concentration interval;
A first determining module configured to determine, for each of the substances, membership information of the substance based on a concentration of the substance and a corresponding plurality of emission levels, the membership information being used to characterize membership of the concentration of the substance to each concentration interval characterized by the corresponding plurality of emission levels, wherein the membership of the concentration of the substance to the concentration interval negatively correlates with an absolute value of a difference between the concentration of the substance and a representative value of the concentration interval;
a second determining module for determining an emission level of volatile organic compounds emitted from the reservoir based on the evaluation weight of each of the plurality of substances and the membership information of each of the substances;
and the control module is used for controlling the emission amount of the volatile organic compounds based on the emission level of the volatile organic compounds emitted by the oil storage warehouse.
Optionally, the third obtaining module is configured to:
for each of the substances, calculating an initial weight of the substance using a first weight calculation formula based on representative values of respective concentration intervals characterized by a plurality of emission levels corresponding to the substance;
Calculating an evaluation weight of each of the plurality of substances using a second weight calculation formula based on the initial weight of each of the plurality of substances;
wherein the first weight calculation formula satisfies:
the second weight calculation formula satisfies:
wherein the variety of the substances is n, and w is as follows i An initial weight of an ith species of the plurality of species, the x i For the concentration of the i-th substance, the z i An average value of representative values of each concentration interval characterized by a plurality of emission levels corresponding to the ith species, theThe evaluation weight of the i-th substance in the plurality of substances.
Optionally, the plurality of emission levels includes: three emission levels; the first determining module is used for:
for each substance, determining the membership of the concentration of the substance to three concentration intervals characterized by the three emission levels by adopting a membership calculation formula based on the concentration of the substance and the corresponding three emission levels;
the membership calculation formula satisfies the following conditions:
wherein the A 1i (x) A degree of membership of an ith species of the plurality of species to a concentration interval characterized by a first of the three emission levels, the A 2i (x) A degree of membership of the ith species to a concentration interval characterized by a second of the three emission levels, the A 3i (x) Concentration intervals that characterize the ith species for a third of the three emission levelsMembership degree, x i For the concentration of the i-th substance, a is a representative value of a concentration interval characterized by the first emission level, b is a representative value of a concentration interval characterized by the second emission level, and c is a representative value of a concentration interval characterized by the third emission level.
Optionally, the second determining module is configured to:
determining an evaluation weight matrix based on the evaluation weight of each of the plurality of substances;
determining a membership matrix based on membership information of each of the plurality of substances;
calculating an evaluation set based on the evaluation weight matrix and the membership matrix by adopting an evaluation function, wherein the evaluation set comprises a plurality of evaluation results which are in one-to-one correspondence with a plurality of emission levels;
determining an emission level corresponding to the maximum value of the evaluation results in the evaluation set as the emission level of the volatile organic compounds emitted by the oil reservoir;
The evaluation function satisfies:
B＝W·R＝[b 1 b 2 … b i … b m ]；
wherein the number of the emission levels is m, B is the evaluation set, W is the evaluation weight matrix, R is the membership matrix, and B i Is the evaluation result corresponding to the i-th emission level.
Optionally, the control module is configured to:
and determining an emission mode of an emission control device based on the emission level of the volatile organic compounds emitted from the oil reservoir, and controlling the emission amount of the volatile organic compounds by the emission control device.
In yet another aspect, there is provided an emission control device for volatile organic compounds of an oil reservoir, the device comprising: a processor, a memory, and a computer program stored on the memory and executable on the processor, the processor implementing the method of controlling emission of volatile organic compounds from a reservoir as described in the above aspect when the computer program is executed.
In yet another aspect, a computer readable storage medium having instructions stored therein, which when run on a computer, cause the computer to perform a method of controlling emission of volatile organic compounds from a reservoir as described in the above aspects is provided.
The beneficial effects that this disclosure provided technical scheme brought include at least:
the method can firstly obtain the concentration of various substances discharged by the oil storage and a plurality of discharge levels corresponding to each substance, secondly obtain the evaluation weight of the substances according to the representative value of each concentration interval represented by the discharge levels of each substance, and determine the membership information of the substances according to the concentration of each substance and the discharge levels, and then determine the discharge levels of VOCs discharged by the oil storage according to the evaluation weight and the membership information of each substance, and finally control the discharge amount of volatile organic compounds based on the determined discharge levels so as to optimize the discharge of the VOCs of the oil storage. The plurality of substances includes: the control method comprehensively considers the concentration of the VOCs and the concentration of at least one component in the VOCs, and evaluates the emission level of the VOCs emitted by the oil storage, so that the accuracy of the emission level of the obtained VOCs is higher, and the influence of the VOCs emitted by the oil storage on the environment can be effectively reduced after the emission amount of the VOCs is controlled according to the emission level.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a flow chart of a method for controlling the emission of volatile organic compounds from a reservoir according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of another method for controlling the emission of volatile organic compounds from a reservoir provided in an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a distribution of emissions detection points provided by an embodiment of the present disclosure;
FIG. 4 is a flow chart of a method for determining an evaluation weight for each substance provided by an embodiment of the present disclosure;
FIG. 5 is a block diagram of a device for controlling the emission of volatile organic compounds from a reservoir according to an embodiment of the present disclosure;
fig. 6 is a block diagram of another device for controlling the emission of volatile organic compounds from a reservoir according to an embodiment of the present disclosure.
Detailed Description
For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.
The embodiment of the disclosure provides a method for evaluating VOCs discharged by an oil reservoir, which can be applied to terminals such as computers or mobile phones. Referring to fig. 1, the emission control method may include:
and 101, acquiring the concentration of various substances discharged from the oil reservoir.
The plurality of substances includes: VOCs, in at least one component contained in VOCs.
Step 102, obtaining a plurality of emission levels corresponding to each substance.
Wherein each emission level is used to characterize one concentration interval of the corresponding substance. That is, the number of emission levels for each substance is the same as the number of concentration intervals for that substance. For example, the number of concentration intervals for each substance is 3, and correspondingly, the number of emission levels for each substance is 3.
It should be noted that the emission levels are sequentially emitted, for example, the emission levels may be arranged in a good-to-bad order, or the emission levels may be arranged in a bad-to-good order, and any two adjacent emission levels may be characterized by two concentration intervals intersecting.
It is also to be noted that, when the number of the plurality of emission levels is 3 or more, that is, when each substance corresponds to three or more emission levels, one end point value of the first target concentration zone coincides with one end point value of the second target concentration zone. The first target concentration interval is any one of a plurality of emission levels corresponding to each substance, and one emission level exists between the emission level corresponding to the first target concentration interval and the emission level corresponding to the second target concentration interval. For example, assuming that there are three emission levels, one end value of the concentration interval corresponding to the first emission level of the three emission levels coincides with one end value of the concentration interval corresponding to the third emission level.
Step 103, for each substance, obtaining an evaluation weight of the substance based on representative values of concentration intervals characterized by a plurality of emission levels.
The representative value of the first concentration interval is an endpoint value of the second concentration interval, which is located in the first concentration interval, the first concentration interval is any one of a plurality of concentration intervals corresponding to a plurality of emission levels corresponding to the substance, and the emission level corresponding to the first concentration interval is adjacent to the emission level corresponding to the second concentration interval.
Step 104, determining membership information of each substance based on the concentration of the substance and a corresponding plurality of emission levels.
The membership information is used for representing membership of the concentration of the substance to each concentration interval represented by the corresponding emission levels. The degree of membership of a concentration of a substance to a concentration interval is inversely related to the absolute value of the difference between the concentration of the substance and the representative value of the concentration interval. That is, the larger the absolute value of the difference between the concentration of the substance and the representative value of a certain concentration range, the smaller the degree of membership of the concentration of the substance to the concentration range. The smaller the absolute value of the difference between the concentration of the substance and the representative value of a certain concentration interval, the greater the degree of membership of the concentration of the substance to the concentration interval.
If the degree of membership of the concentration of the substance to a certain concentration interval characterized by a plurality of emission levels corresponding to the substance is larger, the degree that the concentration of the substance belongs to the concentration interval is higher. Conversely, if the degree of membership of the concentration of a substance to a certain concentration interval characterized by a plurality of emission levels corresponding to the substance is smaller, the degree to which the concentration of the substance belongs to the concentration interval is lower.
Step 105, determining the emission level of VOCs emitted from the reservoir based on the evaluation weight of each of the plurality of substances and the membership information of each of the substances.
The number of emission levels of VOCs discharged from the reservoir is the same as the number of emission levels of each of the plurality of substances.
And 106, controlling the discharge amount of the VOCs based on the discharge level of the VOCs discharged by the oil reservoir.
In the embodiment of the disclosure, the terminal may establish a communication connection with the emission control device, and may send the determined emission level to the emission control device for the emission control device to control the emission amount of the volatile organic compounds based on the obtained emission level, so as to optimize the emission of the volatile organic compounds from the oil reservoir.
In summary, the embodiments of the present disclosure provide a method for controlling the emission of VOCs in an oil reservoir, where the method may first obtain the concentration of a plurality of substances emitted from the oil reservoir and a plurality of emission levels corresponding to each substance, then obtain an evaluation weight of each substance according to a representative value of each concentration interval represented by the plurality of emission levels of each substance, and determine membership information of each substance according to the concentration and the emission level of the substance, then determine the emission level of VOCs emitted from the oil reservoir according to the evaluation weight and the membership information of each substance, and finally control the emission amount of volatile organic compounds based on the emission level, so as to optimize the emission of VOCs in the oil reservoir. The plurality of substances includes: the control method comprehensively considers the concentration of the VOCs and the concentration of at least one component in the VOCs, and evaluates the emission level of the VOCs emitted by the oil storage, so that the accuracy of the emission level of the obtained VOCs is higher, and the influence of the VOCs emitted by the oil storage on the environment can be effectively reduced after the emission amount of the VOCs is controlled according to the emission level.
Fig. 2 is a flowchart of another method for controlling the emission of VOCs in an oil reservoir, which may be applied to a terminal such as a computer or a mobile phone, according to an embodiment of the present disclosure. Referring to fig. 2, the emission control method may include:
step 201, obtaining the concentration of various substances discharged from the oil reservoir.
The concentration of the plurality of substances includes: VOCs, in at least one component contained in VOCs. The various substances are the evaluation factors of VOCs discharged by the oil reservoir.
In the embodiment of the disclosure, a concentration detection point may be disposed around the oil reservoir, a concentration detection device is disposed at a position where the concentration detection point is located, the concentration detection device may collect concentrations of multiple substances discharged from the oil reservoir, and may send the collected concentrations of the multiple substances to the terminal, and accordingly, the terminal may obtain the concentrations of the multiple substances at the concentration detection point. In order to improve the accuracy of the obtained concentration of the plurality of substances, the terminal may generally obtain the concentration of the plurality of substances collected by the concentration detection apparatus located at the position of the concentration detection point at the downwind direction. Note that the concentration detection point located in the leeward direction may be referred to as a leeward point. Typically, the downwind point may be determined by the staff based on a reference point set around the reservoir, and the current wind direction. The concentration detection device is also arranged at the position of the reference point, and correspondingly, the terminal can also acquire the concentration of various substances at the reference point.
Optionally, the concentration detection device may detect a wind direction at a position where the concentration detection device is located, and may send the detected wind direction to the terminal, where the terminal may display the wind direction after receiving the wind direction. When determining the downwind point, the worker may first determine a reference point around the reservoir and set a concentration detection device at the reference point. Then, the worker can determine the leeward point around the oil reservoir according to the wind direction detected by the concentration detection apparatus provided at the position of the reference point.
In the embodiment of the disclosure, the number of the leeward points may be plural, the terminal may acquire the concentration of the plural substances collected by the concentration detection apparatus at the position of each leeward point of the plural leeward points, and may use the average value of the concentration of each substance collected by the plural concentration detection apparatuses as the concentration of the substance, thereby further ensuring the accuracy of the acquired concentration of each substance. Wherein the average value may be an arithmetic average value.
For example, referring to fig. 3, assuming that a reference point is set around the oil reservoir O, the wind direction is southwest wind, the number of leeward points determined according to the wind direction and the reference point a is three, and the three leeward points are B, C and D, respectively.
In embodiments of the present disclosure, VOCs discharged from a reservoir may include a plurality of components, and in order to improve the evaluation efficiency of evaluating the discharge of VOCs from the reservoir, the concentration of the plurality of components having a greater influence on the quality of air and the concentration of VOCs may be generally used to evaluate the VOCs discharged from the reservoir. Currently, the larger percentage of VOCs can include a variety of components that have a greater impact on air quality: benzene, toluene and xylene. Correspondingly, the terminal can acquire the concentration of VOCs, the concentration of benzene, the concentration of toluene and the concentration of xylene, which are acquired by the concentration detection equipment at the position of the downwind point.
For example, referring to fig. 3, assuming that 4 concentration detection points (i.e., points a, B, C, and D in fig. 3) are provided around the reservoir, at least one component included in VOCs includes: the concentrations of each of the plurality of substances at each concentration detection point obtained by the terminal are shown in table 1. As can be seen from Table 1, the benzene concentration at the downwind point B obtained at the terminal was 0.06 milligrams per cubic meter (mg/m 3 ) Toluene concentration of 0.322mg/m 3 The concentration of xylene was 0.121mg/m 3 The concentration of VOCs was 1.536mg/m 3 . Benzene concentration at downwind point C was 0.04mg/m 3 Toluene concentration of 0.364mg/m 3 The concentration of xylene was 0.156mg/m 3 The concentration of VOCs was 1.327mg/m 3 . Assuming that the terminal takes the arithmetic average of the concentration of each substance at three downwind points as the concentration of that substance, referring to Table 1, the concentration of benzene in the plurality of substances obtained by the terminal is 0.057mg/m 3 Toluene concentration of 0.366mg/m 3 The concentration of xylene was 0.136mg/m 3 The concentration of VOCs was 1.265mg/m 3 。
TABLE 1
In the embodiment of the disclosure, the terminal may acquire the concentrations of the plurality of substances when the current environmental condition satisfies the preset environmental condition, so as to further ensure the accuracy of the acquired concentrations of the plurality of substances. The environmental conditions may include, among others: wind speed and weather conditions. The preset environmental conditions may include: the wind speed is within the wind speed range, and the weather condition is sunny. The wind speed range may be determined by a worker based on detection criteria for VOCs.
Alternatively, the wind speed may range from 1 meter per second (m/s) to 2m/s.
It should be noted that, in general, the wind speed at each concentration detection point may be different. In order to improve the efficiency of acquiring the concentrations of the plurality of substances on the premise of ensuring the accuracy of the concentrations of the plurality of substances acquired by the terminal, the terminal can acquire the concentrations of the plurality of substances when the current environmental condition at each leeward point meets the preset environmental condition.
Optionally, an environment detection device may be disposed at a location where each concentration detection point is located, and each environment detection device may detect a current environmental condition at the concentration detection point. Each environment detection device may establish a communication connection with the terminal and may transmit the detected environmental condition to the terminal. Accordingly, the terminal may acquire the current environmental condition. Alternatively, each concentration detection apparatus may include: an environmental detection component for detecting an environmental condition. Accordingly, the concentration detection apparatus may also send the detected environmental condition to the terminal. Correspondingly, the terminal can acquire the current environmental condition of each concentration detection point.
Alternatively, the environment detection unit and the environment detection group in the concentration detection apparatus may also detect the atmospheric pressure, the ambient temperature, and the relative humidity of the current environment, and may transmit the detected atmospheric pressure, ambient temperature, and relative humidity to the terminal. Correspondingly, the terminal can also acquire the atmospheric pressure, the ambient temperature and the relative humidity of the current environment.
For example, assuming that there are 4 concentration detection points A, B, C and D in total, wherein the leeward points are B, C and D, the current environmental condition at each concentration detection point acquired by the terminal is shown in table 2, it can be seen from table 2 that the wind speeds at the 4 concentration detection points acquired by the terminal are 0.8, 1.2, 1.5 and 1.3 in order, wherein the wind speeds at the positions of the leeward points B, C and D are all within the wind speed range [1,2], and the weather is sunny, so that the terminal can determine that the current environmental condition satisfies the preset environmental condition, and the terminal can acquire the concentrations of the plurality of substances acquired by each concentration detection device.
TABLE 2
It can also be seen from Table 2 that the terminal acquires a current ambient air pressure of 102.51 kilopascals (kPa), an ambient temperature of 17.4 degrees Celsius (C.) and a relative humidity of 32.6%.
Step 202, obtaining a plurality of emission levels corresponding to each substance.
Wherein each emission level may be used to characterize one concentration interval of a corresponding substance. That is, the number of emission levels for each substance is the same as the number of concentration intervals for that substance. Alternatively, the number of concentration intervals for each substance is 3, and correspondingly, the number of the plurality of emission levels may be 3.
It should be noted that in the embodiment of the present disclosure, the plurality of emission levels are sequentially emitted, for example, the plurality of emission levels may be arranged from good to poor, or from poor to good, and two concentration intervals characterized by any adjacent two emission levels in the plurality of emission levels intersect.
By way of example, the number of the plurality of emission levels is 3, the 3 emission levels may be arranged from good to bad, then a first emission level of the plurality of emission levels may be good, a second emission level may be medium, a third emission level may be bad, and the concentration interval of the first emission level characterization may intersect the concentration interval of the second emission level characterization, and the concentration interval of the second emission level characterization may intersect the concentration interval of the third emission level characterization.
Step 203, for each substance, acquiring an evaluation weight of the substance based on representative values of concentration intervals characterized by a plurality of emission levels.
The representative value of the first concentration interval may be an endpoint value located in the first concentration interval in the second standard concentration interval, where the first concentration interval is any one of a plurality of concentration intervals corresponding to a plurality of emission levels corresponding to the substance, and the emission level corresponding to the first concentration interval is adjacent to the emission level corresponding to the second concentration interval.
When the number of the plurality of emission levels is 3 or more, that is, when each substance corresponds to three or more emission levels, one end point value of the first target concentration region coincides with one end point value of the second target concentration region. The first target concentration interval is any one of a plurality of emission levels corresponding to each substance, and one emission level exists between the emission level corresponding to the first target concentration interval and the emission level corresponding to the second target concentration interval. For example, assuming that there are three emission levels, one end value of the concentration interval corresponding to the first emission level of the three emission levels coincides with one end value of the concentration interval corresponding to the third emission level.
It should also be noted that, in the embodiment of the present disclosure, since each substance has a different influence on the air quality, the concentration ranges of the emission level characterization of each substance are also different, and accordingly, the representative values of the concentration ranges of the emission level characterization of each substance are also different.
In an alternative implementation, referring to fig. 4, the process of obtaining the evaluation weight of each substance may include:
step 2031, for each substance, calculating an initial weight of the substance using a first weight calculation formula based on the concentration of the substance and the plurality of emission levels of the substance.
The first weight calculation formula may satisfy:
in the formula (1), w i Is the initial weight of the ith substance in the plurality of substances, i is a positive integer, x i Z is the concentration of the i-th substance i Average of representative values of each concentration interval characterized for a plurality of emission levels corresponding to the ith species.
Alternatively, the average value of the representative values of the respective concentration intervals may refer to an arithmetic average value, a geometric average value, and a root mean square of the representative values of the respective concentration intervals.
Illustratively, the VOCs are assumed to comprise at least one component comprising: benzene, toluene, and xylene, 3 emission levels for each substance, and the concentration intervals characterized by the emission levels of each substance pre-stored in the terminal are shown in Table 3, the concentrations of the various substances obtained at the terminal are shown in Table 1, i.e., the benzene concentration is 0.057mg/m 3 Toluene concentration of 0.366mg/m 3 The concentration of xylene was 0.136mg/m 3 The concentration of VOCs is 1.265mg +.m 3 。
TABLE 3 Table 3
As can be seen from table 3, the first of the 3 emission levels is good, the second emission level is medium, and the third emission level is bad. Let a denote the representative value of the concentration interval of the first emission level characterization, b denote the representative value of the concentration interval of the second emission level characterization, c denote the representative value of the concentration interval of the third emission level characterization. The representative value a=0.01 of the concentration interval characterized by the first emission level of benzene, the representative value b=0.03 of the concentration interval characterized by the second emission level, and the representative value c=0.1 of the concentration interval characterized by the third emission level. Representative values of the concentration intervals characterized by the three emission levels of toluene are, in order: representative values of concentration intervals characterized by three emission levels of xylenes are, in order, a=0.07, b=0.2, and c=0.6: representative values of concentration intervals characterized by three emission levels of vocs, a=0.03, b=0.07, and c=0.2, are: a=0.13, b=0.4, and c=2.0. Wherein, in Table 3 "+ -infinity' representing positive infinity.
The terminal may calculate based on the above first weight calculation formula, i.e., formula (1):
Initial weight of benzene w 1 ＝0.057/[(0.01+0.03+0.1)/3]＝1.21；
Initial weight w of toluene 2 ＝0.366/[(0.322+0.364+0.411)/3]＝1.26；
Initial weight w of xylene 3 ＝0.136/[(0.03+0.07+0.2)/3]＝1.36；
Initial weight w of VOCs 4 ＝1.265/[(0.13+0.4+2.0)/3]＝1.52。
Step 2032, calculating an evaluation weight of each substance by using a second weight calculation formula based on the initial weight of each substance in the plurality of substances.
Wherein, the second weight calculation formula satisfies:
in the formula (2),the evaluation weight of the i-th substance among the plurality of substances is the evaluation weight of the n-th substance, i.e., n is the number of the plurality of kinds of substances.
By way of example, assume that the initial weight of a terminal to acquire each of a plurality of substances is: initial weight of benzene w 1 Initial weight w of toluene=1.21 2 Initial weight of xylene w=1.26 3 Initial weight w of vocs=1.36 4 =1.52. The terminal calculates based on the above second weight calculation formula, i.e., formula (2):
evaluation weight of benzene
Evaluation weight of toluene
Evaluation weight of xylene
Evaluation weight of VOCs
In another alternative implementation, the terminal may determine the evaluation weight of each substance based on the representative value of the concentration interval characterized by the last emission level of the plurality of emission levels of the substance, e.g., may determine the inverse of the representative value of the concentration interval characterized by the last emission level as the evaluation weight of the substance.
Step 204, for each substance, determining the membership degree of the concentration of the substance to a plurality of concentration intervals characterized by a plurality of emission levels by adopting a membership degree calculation formula based on the concentration of the substance and a plurality of emission levels corresponding to the concentration of the substance.
Wherein the membership degree of the concentration of a substance to a certain concentration interval is inversely related to the absolute value of the difference between the concentration of the substance and the representative value of the concentration interval. That is, the larger the absolute value of the difference between the concentration of the substance and the representative value of a certain concentration range, the smaller the degree of membership of the concentration of the substance to the concentration range. The smaller the absolute value of the difference between the concentration of the substance and the representative value of a certain concentration interval, the greater the degree of membership of the concentration of the substance to the concentration interval.
In this embodiment of the present application, if the degree of membership of the concentration of a substance to a certain concentration interval characterized by a plurality of emission levels corresponding to the substance is greater, the degree to which the concentration of the substance belongs to the concentration interval is greater. Conversely, if the degree of membership of the concentration of a substance to a certain concentration interval characterized by a plurality of emission levels corresponding to the substance is smaller, the degree to which the concentration of the substance belongs to the concentration interval is lower. Alternatively, the membership may range from 0,1, i.e., 0 or more to 1.
If each substance corresponds to three emission levels, then for each substance, the terminal may determine the membership of that substance to each of the three concentration intervals characterized by the three emission levels based on equation (3) below.
In the formula (3), A 1i (x) A membership degree of the ith substance in the plurality of substances to the concentration interval characterized by the first emission level, A 2i (x) Membership of the ith species in the plurality of species to the concentration interval characterized by the second emission level, A 3i (x) For the membership of the ith substance in the plurality of substances to the concentration interval characterized by the third emission level, a is the representative value of the concentration interval characterized by the first emission level, b is the representative value of the concentration interval characterized by the second emission level, and c is the representative value of the concentration interval characterized by the third emission level.
For example, assume that the terminal obtains a benzene concentration of 0.057mg/m 3 Toluene concentration of 0.366mg/m 3 The concentration of xylene was 0.136mg/m 3 The concentration of VOCs was 1.265mg/m 3 Concentration intervals characterized by emission levels of each of the plurality of substances stored in advance are shown in table 3, and three emission levels corresponding to each substance are good, medium, and poor in order. The terminal may calculate the membership of each substance to the concentration interval characterized by the corresponding emission level based on the above formula (3), for example, bringing the benzene concentration of 0.057 into the above formula (3), and may sequentially obtain the membership A of benzene to the concentration interval characterized by the first of the three emission levels 11 (x) =0, membership a of concentration interval characterized by second emission level 21 (x) =0.61, membership a of concentration interval characterized by third emission level 31 (x) =0.39. The membership of each substance calculated by the above formula (3) to three concentration intervals by bringing the concentrations of toluene, xylene and VOCs into the above order at the terminal may be as shown in table 4.
TABLE 4 Table 4
As can be seen from table 4, the membership of toluene to the concentration interval characterized by the three emission levels was 0, 0.58 and 0.42 in order. The xylene membership to the concentration interval characterized by the three emission levels was 0, 0.49 and 0.51 in order. The membership of VOCs to the concentration interval characterized by the three emission levels was 0, 0.46 and 0.54 in order.
Step 205, determining an evaluation weight matrix based on the evaluation weight of each of the plurality of substances.
The evaluation weight matrix may be a matrix of rows and columns composed of the evaluation weights of each of the plurality of substances.
By way of example, assume that the various substances are: benzene, toluene, xylene and VOCs, and the evaluation weight of benzeneEvaluation weight of toluene->Evaluation weight of xylene->Evaluation weight of VOCs->The evaluation weight matrix W acquired by the terminal is: w= [0.23 0.24 0.25 0.28 ] ] T 。
Step 206, determining a membership matrix based on membership information of each of the plurality of substances.
The membership matrix may be a matrix composed of membership of each of a plurality of concentration intervals characterized by a plurality of emission levels of each of a plurality of substances to the substance. The number of rows of the membership matrix is equal to the number of various substances, and the number of columns of the membership matrix is equal to the number of emission levels.
By way of example, assume that the various substances are: benzene, toluene, xylene and VOCs, each corresponding to three emission levels, the membership of each substance obtained by the terminal to the concentration interval represented by the three emission levels is shown in table 4, and the membership matrix R obtained by the terminal is:
step 207, calculating an evaluation set by adopting an evaluation function based on the evaluation weight matrix and the membership matrix.
The evaluation set includes a plurality of evaluation results corresponding to a plurality of emission levels one by one. That is, the number of evaluation results is equal to the number of emission levels.
The evaluation function satisfies:
B＝W·R＝[b 1 b 2 … b i … b m ]formula (4)
In the formula (4), B is an evaluation set, W is an evaluation weight matrix, R is a membership matrix, and B i The i-th evaluation result.
For example, assume that the terminal determines an evaluation weight matrix w= [0.230.240.250.28 ]] T Determined membership matrixThe emission evaluation matrix determines the first evaluation result B in the evaluation set B according to the above formula (4) 1 =0, second evaluation result b 2 =0.53, third evaluation result b 3 =0.47, i.e. evaluation set b= [ 0.53 0.47]]。
And step 208, determining the emission level corresponding to the maximum value of the evaluation results in the evaluation set as the emission level of VOCs emitted by the oil reservoir.
In the embodiment of the disclosure, after determining the evaluation set, the terminal may compare each evaluation result in the evaluation set based on the maximum membership rule to determine the maximum value of the evaluation result, and may determine the emission level corresponding to the maximum value as the emission level of VOCs.
By way of example, assuming that the terminal determines the evaluation set b= [ 0.53 0.47], the maximum value in the evaluation set may be determined to be 0.53. Since 0.53 corresponds to the second emission level (i.e., medium), the terminal can determine that the emission level of the reservoir VOCs is medium.
Step 209, determining an emission pattern of the emission control device based on the emission level of VOCs in the oil reservoir, and controlling the emission amount of VOCs by the emission control device.
In the embodiment of the disclosure, the emission control device stores a correspondence between the emission pattern and the emission level, and after receiving the emission level of the VOCs in the oil reservoir sent by the terminal, the emission control device may determine the emission pattern according to the correspondence, and control the emission amount of the VOCs in the oil reservoir based on the determined emission pattern, thereby optimizing the emission of the VOCs in the oil reservoir.
Wherein, emission control equipment is connected with the oil reservoir, can control the discharge of the VOCs of oil reservoir. The emission control device also establishes a communication connection with the emission control device via a wired or wireless means with the terminal, through which the terminal can send the determined emission level to the emission control device, and correspondingly the emission control device can obtain the emission level.
It should be noted that, each emission mode is recorded with a corresponding emission parameter, and the emission control device can adjust the corresponding emission parameter of the oil reservoir based on the emission parameter in the mode, so as to realize control of the emission amount of VOCs, thereby optimizing the emission of VOCs in the oil reservoir.
Optionally, the sequence of the steps of the method for controlling the emission of VOCs in the oil reservoir provided in the embodiments of the present disclosure may be appropriately adjusted, and the steps may also be increased or decreased accordingly according to the situation. For example, step 201 and step 202 may be performed simultaneously, and step 205 and step 206 may be performed simultaneously. Any method that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered in the scope of the present invention, and thus will not be repeated.
In summary, the embodiments of the present disclosure provide a method for controlling the emission of VOCs in an oil reservoir, where the method may first obtain the concentration of a plurality of substances emitted from the oil reservoir and a plurality of emission levels corresponding to each substance, then obtain an evaluation weight of each substance according to a representative value of each concentration interval represented by the plurality of emission levels of each substance, and determine membership information of each substance according to the concentration and the emission level of the substance, then determine the emission level of VOCs emitted from the oil reservoir according to the evaluation weight and the membership information of each substance, and finally control the emission amount of volatile organic compounds based on the determined emission level, so as to optimize the emission of VOCs in the oil reservoir. The plurality of substances includes: the control method comprehensively considers the concentration of the VOCs and the concentration of at least one component in the VOCs, and evaluates the emission level of the VOCs emitted by the oil storage, so that the accuracy of the emission level of the obtained VOCs is higher, and the influence of the VOCs emitted by the oil storage on the environment can be effectively reduced after the emission amount of the VOCs is controlled according to the emission level.
Referring to fig. 5, an embodiment of the present disclosure provides a device for controlling the emission of VOCs from an oil reservoir, which may include:
A first obtaining module 301, configured to obtain concentrations of a plurality of substances discharged from the oil reservoir, where the plurality of substances include: VOCs, and at least one component contained in VOCs.
A second obtaining module 302, configured to obtain a plurality of emission levels corresponding to each substance, where each emission level is used to represent a concentration interval of the corresponding substance, and two concentrations represented by any two adjacent emission levels intersect.
A third obtaining module 303 is configured to obtain, for each substance, an evaluation weight of the substance based on representative values of respective concentration intervals characterized by a corresponding plurality of emission levels.
The representative value of the first concentration interval is an endpoint value of the second concentration interval, which is located in the first concentration interval, the first concentration interval is any one of a plurality of concentration intervals corresponding to a plurality of emission levels corresponding to the substance, and the emission level corresponding to the first concentration interval is adjacent to the emission level corresponding to the second concentration interval.
The first determining module 304 is configured to determine, for each substance, membership information of the substance based on a concentration of the substance and a corresponding plurality of emission levels, where the membership information is used to characterize a membership of the concentration of the substance to each concentration interval characterized by the corresponding plurality of emission levels, and the membership of the concentration of the substance to the concentration interval is inversely related to an absolute value of a difference between the concentration of the substance and a representative value of the concentration interval.
The second determining module 305 is configured to determine an emission level of VOCs emitted from the reservoir based on the evaluation weight of each of the plurality of substances and the membership information of each of the plurality of substances.
A control module 306 for controlling the discharge amount of VOCs based on the discharge level of VOCs discharged from the reservoir.
Optionally, the third obtaining module 303 is configured to:
for each substance, calculating an initial weight of the substance by using a first weight calculation formula based on representative values of respective concentration intervals characterized by the concentration of the substance and a plurality of emission levels corresponding to the substance;
calculating an evaluation weight of each substance by adopting a second weight calculation formula based on the initial weight of each substance in the plurality of substances;
wherein, the first weight calculation formula satisfies:
the second weight calculation formula satisfies:
wherein the variety of the substances is n, w i An initial weight, x, of an ith species of the plurality of species i Z is the concentration of the i-th substance i An average value of representative values of respective concentration intervals characterized for a plurality of emission levels corresponding to the i-th substance,the evaluation weight of the i-th substance among the plurality of substances.
Optionally, the plurality of emission levels includes: three emission levels; the first determining module 304 is configured to:
For each substance, determining the membership degree of the concentration of the substance to three concentration intervals represented by the three emission levels by adopting a membership degree calculation formula based on the concentration of the substance and the corresponding three emission levels;
the membership calculation formula satisfies:
wherein A is 1i (x) Concentration interval for characterization of an ith species of the plurality of species for a first of the three emission levelsDegree of genus, A 2i (x) Membership of the ith species to a concentration interval characterized by a second of the three emission levels, A 3i (x) Membership, x, of the ith species to a concentration interval characterized by a third of the three emission levels i For the concentration of the i-th substance, a is a representative value of a concentration interval characterized by the first emission level, b is a representative value of a concentration interval characterized by the second emission level, and c is a representative value of a concentration interval characterized by the third emission level.
Optionally, the second determining module 305 is configured to:
determining an evaluation weight matrix based on the evaluation weight of each of the plurality of substances;
determining a membership matrix based on membership information of each of the plurality of substances;
calculating an evaluation set based on the evaluation weight matrix and the membership matrix by adopting an evaluation function, wherein the evaluation set comprises a plurality of evaluation results which are in one-to-one correspondence with a plurality of emission levels;
Determining the emission level corresponding to the maximum value of the evaluation results in the evaluation set as the emission level of VOCs emitted by the oil reservoir;
the evaluation function satisfies:
B＝W·R＝[b 1 b 2 … b i … b m ]；
wherein the number of the emission levels is m, B is an evaluation set, W is an evaluation weight matrix, R is a membership matrix, B i Is the evaluation result corresponding to the i-th emission level.
Optionally, the control module 306 is configured to: the discharge mode of the discharge control device is determined based on the discharge level of VOCs discharged from the reservoir, and the discharge amount of VOCs is controlled by the discharge control device.
In summary, the embodiments of the present disclosure provide an emission control device for VOCs in an oil reservoir, where the device may first obtain concentrations of a plurality of substances emitted from the oil reservoir and a plurality of emission levels corresponding to each substance, then obtain an evaluation weight of each substance according to a representative value of each concentration interval represented by the plurality of emission levels of each substance, determine membership information of each substance according to the concentration and the emission level of the substance, then determine an emission level of VOCs emitted from the oil reservoir according to the evaluation weight and the membership information of each substance, and finally control an emission amount of volatile organic compounds based on the determined emission level, so as to optimize emission of VOCs in the oil reservoir. The plurality of substances includes: the control method comprehensively considers the concentration of the VOCs and the concentration of at least one component in the VOCs, and evaluates the emission level of the VOCs emitted by the oil storage, so that the accuracy of the emission level of the obtained VOCs is higher, and the influence of the VOCs emitted by the oil storage on the environment can be effectively reduced after the emission amount of the VOCs is controlled according to the emission level.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus and each module described above may refer to the corresponding process in the foregoing method embodiment, which is not repeated herein.
Fig. 6 is a block diagram of another arrangement for controlling the emission of VOCs from a storage reservoir according to an embodiment of the present disclosure. Referring to fig. 6, the apparatus includes: a processor 401, a memory 402, and a computer program stored on the memory 402 and executable on the processor 401, when executing the computer program, implements a method for controlling the emission of VOCs in a reservoir provided by the method implementation described above, for example, the method shown in fig. 1 or fig. 2.
Embodiments of the present disclosure provide a computer readable storage medium having instructions stored therein, which when executed on a computer, cause the computer to perform a method of emission control of VOCs of an oil reservoir, such as the method shown in fig. 1 or fig. 2, provided by the method embodiments described above.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The foregoing description of the exemplary embodiments of the present disclosure is not intended to limit the present disclosure, but rather, any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the present disclosure are intended to be included within the scope of the present disclosure.

Claims (3)

1. A method for controlling the emission of volatile organic compounds from an oil reservoir, the method comprising:
obtaining the concentration of a plurality of substances discharged from the reservoir, the plurality of substances including: the volatile organic compound, and at least one component contained in the volatile organic compound, the at least one component comprising: benzene, toluene and xylene, wherein the concentrations of the plurality of substances are collected through a concentration detection device at a concentration detection point, the concentrations of the plurality of substances collected by the concentration detection device at the position of each leeward point in a plurality of leeward points are obtained, and the average value of the concentrations of the plurality of substances collected by the concentration detection device is taken as the concentration of the substances;
obtaining a plurality of emission levels corresponding to each substance, wherein each emission level is used for representing one concentration interval of the corresponding substance, two concentration intervals represented by any two adjacent emission levels are intersected, the number of the concentration intervals of each substance is three, and the plurality of emission levels comprise: three emission levels;
For each of the substances, calculating an initial weight of the substance using a first weight calculation formula based on representative values of respective concentration intervals characterized by a plurality of emission levels corresponding to the substance;
calculating an evaluation weight of each of the plurality of substances using a second weight calculation formula based on the initial weight of each of the plurality of substances;
wherein the first weight calculation formula satisfies:
the second weight calculation formula satisfies:
wherein the variety of the substances is n, and w is as follows i An initial weight of an ith species of the plurality of species, the x i For the concentration of the i-th substance, the z i An average value of representative values of each concentration interval characterized by a plurality of emission levels corresponding to the ith species, theThe evaluation weight of the i-th substance in the plurality of substances is that a representative value of a first concentration interval is an end value located in the first concentration interval in a second concentration interval, the first concentration interval is any one of a plurality of concentration intervals corresponding to a plurality of emission levels corresponding to the substances, the emission level corresponding to the first concentration interval is adjacent to the emission level corresponding to the second concentration interval, wherein the average value of the representative values of the concentration intervals is arithmetic average, geometric average and root mean square of the representative values of the concentration intervals, the concentration interval characterized by the emission level of each substance is obtained, a first emission level of the three emission levels is good, the second emission level is middle, and a third emission level is bad, wherein the concentration interval of the first emission level of benzene is [0,0.03 ] ]The concentration interval of the second emission level of benzene is [0.01,0.1 ]]The concentration interval of the third emission level of benzene is [0.03, + -infinity); the concentration range of the first emission level of toluene is [0,0.2 ]]The concentration range of the second emission level of toluene is [0.07,0.6 ]]The concentration interval of the third emission level of toluene is [0.2, + -infinity); the concentration range of the first discharge grade of the xylene is [0,0.07 ]]The concentration range of the second discharge grade of the xylene is [0.03,0.2 ]]The concentration interval of the third emission level of the xylene is [0.07, ++ infinity);the concentration range of the first emission level of the volatile organic compounds is [0,0.4 ]]The concentration range of the second emission level of the volatile organic compounds is [0.13,2.0 ]]The concentration interval of the third emission level of the volatile organic compounds is [0.4, ++ infinity a) of the above-mentioned components, ++ infinity represents positive infinity;
determining, for each of the substances, membership information of the substance based on a concentration of the substance and a corresponding plurality of emission levels, the membership information being used to characterize membership of the concentration of the substance to respective concentration intervals characterized by the corresponding plurality of emission levels, wherein the membership of the concentration of the substance to the concentration intervals is inversely related to an absolute value of a difference between the concentration of the substance and a representative value of the concentration interval;
Determining an evaluation weight matrix based on the evaluation weight of each of the plurality of substances, the evaluation weight matrix being a matrix of rows and columns made up of the evaluation weights of each of the plurality of substances;
determining a membership matrix based on membership information of each of the plurality of substances, the membership matrix being a matrix composed of membership of each of the plurality of concentration intervals characterized by a plurality of emission levels of each of the plurality of substances to the substance;
calculating an evaluation set based on the evaluation weight matrix and the membership matrix by adopting an evaluation function, wherein the evaluation set comprises a plurality of evaluation results which are in one-to-one correspondence with a plurality of emission levels;
determining an emission level corresponding to the maximum value of the evaluation results in the evaluation set as the emission level of the volatile organic compounds emitted by the oil reservoir;
the evaluation function satisfies:
B＝W·R＝[b 1 b 2 …b i …b m ]；
wherein the number of the emission levels is m, B is the evaluation set, W is the evaluation weight matrix, R is the membership matrix, and B i Is an evaluation result corresponding to the i-th emission level;
determining an emission pattern of an emission control device, by which an emission amount of the volatile organic compound is controlled, based on an emission level of the volatile organic compound emitted from the oil reservoir;
for each of the substances, determining membership information for the substance based on the concentration of the substance and a corresponding plurality of emission levels, comprising:
for each substance, determining the membership of the concentration of the substance to three concentration intervals characterized by the three emission levels by adopting a membership calculation formula based on the concentration of the substance and the corresponding three emission levels;
the membership calculation formula satisfies the following conditions:
wherein the A 1i (x) A degree of membership of an ith species of the plurality of species to a concentration interval characterized by a first of the three emission levels, the A 2i (x) A degree of membership of the ith species to a concentration interval characterized by a second of the three emission levels, the A 3i (x) A degree of membership of the ith species to a concentration interval characterized by a third of the three emission levels, the x i For the concentration of the i-th substance, a is a representative value of a concentration interval characterized by the first emission level, b is a representative value of a concentration interval characterized by the second emission level, and c is a representative value of a concentration interval characterized by the third emission level.
2. The method of claim 1, wherein controlling the emission of the volatile organic compounds based on the emission level of the volatile organic compounds emitted from the reservoir comprises:
and determining an emission mode of an emission control device based on the emission level of the volatile organic compounds emitted from the oil reservoir, and controlling the emission amount of the volatile organic compounds by the emission control device.
3. A device for controlling the emission of volatile organic compounds from an oil reservoir, said device comprising:
a first acquisition module for acquiring the concentration of a plurality of substances discharged from the reservoir, the plurality of substances including: the volatile organic compound, and at least one component contained in the volatile organic compound, the at least one component comprising: benzene, toluene and xylene, wherein the concentrations of the plurality of substances are collected through a concentration detection device at a concentration detection point, the concentrations of the plurality of substances collected by the concentration detection device at the position of each leeward point in a plurality of leeward points are obtained, and the average value of the concentrations of the plurality of substances collected by the concentration detection device is taken as the concentration of the substances;
A second obtaining module, configured to obtain a plurality of emission levels corresponding to each substance, where each emission level is used to represent one concentration interval of the corresponding substance, two concentration intervals represented by any adjacent emission levels intersect, and the number of concentration intervals of each substance is three, and the plurality of emission levels includes: three emission levels;
a third obtaining module, configured to calculate, for each of the substances, an initial weight of the substance using a first weight calculation formula based on representative values of respective concentration intervals represented by a plurality of emission levels corresponding to the substance;
calculating an evaluation weight of each of the plurality of substances using a second weight calculation formula based on the initial weight of each of the plurality of substances;
wherein the first weight calculation formula satisfies:
the second weight calculation formula satisfies:
wherein the variety of the substances is n, and w is as follows i An initial weight of an ith species of the plurality of species, the x i For the concentration of the i-th substance, the z i An average value of representative values of each concentration interval characterized by a plurality of emission levels corresponding to the ith species, the The evaluation weight of the i-th substance in the plurality of substances is that a representative value of a first concentration interval is an end value located in the first concentration interval in a second concentration interval, the first concentration interval is any one of a plurality of concentration intervals corresponding to a plurality of emission levels corresponding to the substances, the emission level corresponding to the first concentration interval is adjacent to the emission level corresponding to the second concentration interval, wherein the average value of the representative values of the concentration intervals refers to an arithmetic average value, a geometric average value and a root mean square of the representative values of the concentration intervals, the concentration interval characterized by the emission level of each substance is obtained, a first emission level of the three emission levels is good, the second emission level is middle, and a third emission level is bad, wherein the concentration interval of the first emission level of benzene is [0,0.03 ]]The concentration interval of the second emission level of benzene is [0.01,0.1 ]]The concentration interval of the third emission level of benzene is [0.03, + -infinity); the concentration range of the first emission level of toluene is [0,0.2 ]]The concentration range of the second emission level of toluene is [0.07,0.6 ] ]The concentration interval of the third emission level of toluene is [0.2, + -infinity); the concentration range of the first discharge grade of the xylene is [0,0.07 ]]The concentration range of the second discharge grade of the xylene is [0.03,0.2 ]]The concentration interval of the third emission level of the xylene is [0.07, ++ infinity); the concentration range of the first emission level of the volatile organic compounds is [0,0.4 ]]The saidThe concentration range of the second emission level of volatile organic compounds is [0.13,2.0 ]]The concentration interval of the third emission level of the volatile organic compounds is [0.4, ++ infinity a) of the above-mentioned components, ++ infinity represents positive infinity;
a first determining module configured to determine, for each of the substances, membership information of the substance based on a concentration of the substance and a corresponding plurality of emission levels, the membership information being used to characterize membership of the concentration of the substance to each concentration interval characterized by the corresponding plurality of emission levels, wherein the membership of the concentration of the substance to the concentration interval negatively correlates with an absolute value of a difference between the concentration of the substance and a representative value of the concentration interval;
a second determining module configured to determine an evaluation weight matrix based on an evaluation weight of each of the plurality of substances, the evaluation weight matrix being a matrix of a plurality of rows and a column composed of the evaluation weights of each of the plurality of substances;
Determining a membership matrix based on membership information of each of the plurality of substances, the membership matrix being a matrix composed of membership of each of the plurality of concentration intervals characterized by a plurality of emission levels of each of the plurality of substances to the substance;
calculating an evaluation set based on the evaluation weight matrix and the membership matrix by adopting an evaluation function, wherein the evaluation set comprises a plurality of evaluation results which are in one-to-one correspondence with a plurality of emission levels;
determining an emission level corresponding to the maximum value of the evaluation results in the evaluation set as the emission level of the volatile organic compounds emitted by the oil reservoir;
the evaluation function satisfies:
B＝W·R＝[b 1 b 2 …b i …b m ]；
wherein the number of the emission levels is m, B is the evaluation set, W is the evaluation weight matrix, R is the membership matrix, and B i For and the ith discharge etcThe evaluation results corresponding to the levels;
a control module for determining an emission pattern of an emission control device based on an emission level of the volatile organic compounds emitted from the oil reservoir, the emission amount of the volatile organic compounds being controlled by the emission control device;
Wherein, based on the emission level of the volatile organic compounds emitted from the oil reservoir, determining an emission mode of an emission control device, and controlling the emission amount of the volatile organic compounds by the emission control device;
for each of the substances, determining membership information for the substance based on the concentration of the substance and a corresponding plurality of emission levels, comprising:
the first determining module is used for:
for each substance, determining the membership of the concentration of the substance to three concentration intervals characterized by the three emission levels by adopting a membership calculation formula based on the concentration of the substance and the corresponding three emission levels;
the membership calculation formula satisfies the following conditions:
wherein the A 1i (x) A degree of membership of an ith species of the plurality of species to a concentration interval characterized by a first of the three emission levels, the A 2i (x) A degree of membership of the ith species to a concentration interval characterized by a second of the three emission levels, the A 3i (x) A degree of membership of the ith species to a concentration interval characterized by a third of the three emission levels, the x i For the concentration of the i-th substance, a is a representative value of a concentration interval characterized by the first emission level, b is a representative value of a concentration interval characterized by the second emission level, and c is a representative value of a concentration interval characterized by the third emission level.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0238860A (en) * 1988-07-28 1990-02-08 Meidensha Corp Estimation of water quality
CN110163537A (en) * 2019-06-25 2019-08-23 北京工商大学 Water eutrophication evaluation method based on trapezoidal cloud model

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0238860A (en) * 1988-07-28 1990-02-08 Meidensha Corp Estimation of water quality
CN110163537A (en) * 2019-06-25 2019-08-23 北京工商大学 Water eutrophication evaluation method based on trapezoidal cloud model

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