Method for optimizing and adjusting dangerous chemical port cargo transportation mode considering operation benefit

Abstract

The application discloses a kind of dangerous chemical port goods transport mode optimization adjustment method considering operation benefit, it is related to dangerous chemical port transport management technical field, including: collecting the data related to dangerous chemical port and goods transport and the operation data of first time period, the dangerous chemical throughput of second time period is predicted and preliminary distribution of transport mode is carried out, effect evaluation is carried out to preliminary distribution result;First, predict the dangerous chemical throughput of third time period, and preliminary distribution of transport mode is carried out to each dangerous chemical;Again, grade determination result is carried out to the dangerous chemical throughput of third time period, transport mode is optimized and adjusted;According to the above mode, the transport mode of following each time period is optimized and adjusted in turn;Through specific benefit calculation method, design dynamic proportion adjustment and effect feedback mechanism, realize transport structure optimization from the dimension of port operation benefit, form closed-loop iterative optimization process, effectively improve dangerous chemical port overall operation benefit and operation rationality.

Description

Technical Field

[0001] This invention relates to the field of hazardous chemical port transportation management technology, specifically a method for optimizing and adjusting hazardous chemical port cargo transportation modes while considering operational efficiency. Background Technology

[0002] As a crucial hub for the transshipment of hazardous chemicals by land and water, hazardous chemical ports undertake the collection and distribution functions of various hazardous chemical goods, such as refined oil and chemical products. In actual operation, the same hazardous chemical goods often have multiple transportation and process options. For example, multi-stage transshipment can be adopted, such as "ship-tank-truck" or "truck-tank-ship," relying on the buffering and regulating functions of the port's storage tanks; or a "truck-ship" direct unloading process can be used, achieving direct transshipment at the wharf, thereby reducing tank occupation and simplifying operations. Different modes of transportation differ in terms of resource occupation, energy consumption costs, operation time, and rate structure at the port, directly affecting the port's operating revenue, operating costs, and overall operational efficiency. How to dynamically allocate the proportion of operations among various feasible modes of transportation from the perspective of the port's own operation entity, so as to maximize the port's operational efficiency while meeting safety production requirements and basic throughput plans, is an important issue in the current refined management of hazardous chemical ports.

[0003] Currently, technologies related to transportation mode optimization and cost control are mostly focused on full-chain logistics cost calculation and route planning. For example, patent CN118569767A, "A Method for Calculating the Full-Chain Cost of Multimodal Transport," integrates all process costs, including transportation costs, loading and unloading fees, transshipment fees, risk costs, and management costs, to construct a multimodal transport cost assessment model, aiming to provide cargo owners or logistics companies with the most cost-effective transportation solutions. However, there is still a lack of a practical and operable transportation mode optimization method specifically tailored to the operational characteristics and benefit objectives of hazardous chemical ports.

[0004] To address the aforementioned shortcomings, this invention aims to propose a feasible and implementable method for optimizing cargo transportation in hazardous chemical ports. This method can optimize the transportation structure from the perspective of port operational efficiency, effectively improving the overall operational efficiency and rationality of hazardous chemical ports. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, the present invention aims to provide a method for optimizing and adjusting the transportation mode of hazardous chemical ports that considers operational efficiency. Based on data related to hazardous chemical ports and cargo transportation, as well as operational data for a first time period, the method optimizes the transportation structure from the perspective of port operational efficiency by using specific efficiency calculation methods, incorporating the characteristics and operational requirements of hazardous chemical transportation modes, and designing dynamic proportion adjustment and effect feedback mechanisms. This forms a closed-loop iterative optimization process, effectively improving the overall operational efficiency and operational rationality of hazardous chemical ports.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A method for optimizing and adjusting the transportation mode of hazardous chemical port cargo, taking into account operational efficiency, includes the following steps: (1) Collect data related to hazardous chemical port and cargo transportation, as well as operational data for the first time period, and calculate the net revenue and unit time operational efficiency value of each optional transportation mode for each hazardous chemical in the first time period. (2) Use the throughput of each hazardous chemical in the port in the first time period to predict the throughput of each hazardous chemical in the second time period; make a preliminary allocation of transportation modes based on the unit time operation efficiency value of each transportation mode for each hazardous chemical; collect the actual operation data of the adjusted second time period and compare it with the actual operation data of the first time period, and evaluate the effect of the preliminary allocation results from the two dimensions of "operation efficiency" and "operation stability". (3) Using the actual operating data of the second time period and the unit time operating efficiency value of each transportation mode for each hazardous chemical, first predict the throughput of each hazardous chemical in the third time period, and make a preliminary allocation of transportation modes for each hazardous chemical; then optimize and adjust the throughput and transportation modes of hazardous chemicals in the third time period based on the level judgment results of the effect evaluation of the second time period. (4) Following the method in step (3), optimize and adjust the transportation methods for each time period in turn until the optimization scheme meets the upper and lower limits of port cargo transportation. All turnover transportation schemes for hazardous chemicals must not exceed the maximum operating load capacity of the hazardous chemical port.

[0007] In this invention, the data related to cargo transportation in step (1) includes cargo and planning basic data, transportation mode data, equipment configuration data, equipment performance data, rate revenue data, and equipment cost data.

[0008] In this invention, for a certain hazardous chemical H i Transportation M i Processing volume V i The formula for calculating its net income is as follows: (1) Calculate income R ( i , m , V ) ; in, F i The loading and unloading fee rate for this hazardous chemical; k These are the mode coefficients; (2) Calculation cost C (i , m , V ) ①When H i When the hazardous chemical is other than sulfuric acid or gasoline: ; in, Q i The flow rate data of the pumps used for this hazardous chemical; E i Equipment cost rate for the equipment used for this hazardous chemical; ②When H i When it is sulfuric acid: ; in, Q i The flow rate data for the pumps used to process the sulfuric acid; E 8 represents the cost rate of the pump during sulfuric acid loading. E 11 Cost rates for using acid gas treatment equipment when loading sulfuric acid onto trucks; ③When H i When using gasoline: ; in, Q i This refers to the flow rate data of the pump used for this gasoline. E i Cost rate of the pump for gasoline transportation E j The cost rate for using oil and gas treatment equipment when transporting gasoline; (3) Calculate net income U ( i , m , V ) .

[0009] In this invention, for a certain hazardous chemical H i Transportation M i Processing volume V i Its unit time operating efficiency value A i The calculation formula is as follows: ; in, Indicates net income, Q iThe flow rate data for the pumps used to process this hazardous chemical. t g The necessary preparation time for loading and unloading goods.

[0010] In this invention, during the forecasting of hazardous chemical throughput, considering the continuous nature of production planning, greater emphasis is placed on the impact of recent data on production operations in the next time period. This means dividing the previous time period into two phases and increasing the weighting of the next phase on the volume of each hazardous chemical being transported in or out. The prediction formula is as follows: ; in: T 1i This refers to the amount of the hazardous chemical that was transported in or out in the previous stage; T 2i This refers to the amount of the hazardous chemical that will be transported in or out in the next stage.

[0011] In this invention, the preliminary allocation of methods for transporting hazardous chemicals is as follows: ① When there is only one mode of transport for hazardous chemicals, the proportion of that mode of transport does not need to be changed, that is, the proportion of that mode of transport is 100%; ② When there are two methods for transporting hazardous chemicals in or out: ; Here, we assume that the two modes of transportation for a certain hazardous chemical to be transported in or out are respectively M m , M n Their corresponding unit time operational efficiency values ​​are respectively A m , A n , Indicates the mode of transportation used for hazardous chemicals M m The initial allocation amount.

[0012] In this invention, the preliminary allocation results are evaluated as follows: The operational efficiency index and operational stability index values ​​were obtained by using the actual operational data of the adjusted second time period to quantify the "operational effectiveness" and "operational stability". The weighted average method is used to combine the operational efficiency index value and the operational stability index value to calculate the final performance evaluation score. The performance evaluation level is then determined based on a pre-set score range.

[0013] In this invention, the process of obtaining the operational efficiency index value that quantifies "operational effectiveness" is as follows: Subtract the net profit from the previous period's operating data from the net profit of the current period's operating data to obtain the difference. The difference is calculated by subtracting the sorted unit-time operational efficiency values ​​from the previous time period's operational efficiency values ​​from the sorted unit-time operational efficiency values ​​in the current time period's operational data. ; Using a scoring matrix, the difference is... and difference This translates into a quantifiable operational efficiency score.

[0014] In this invention, the process of quantifying the operational stability index value of "operational stability" is as follows: The fluctuation in the number of tasks was statistically analyzed and calculated, and the calculation method is shown in the following formula: ; in, G i No. i The number of assignments within a given time period; The preset threshold for the fluctuation range of the number of operations is used to quantify and score the results, thus obtaining the final operation stability index value.

[0015] In this invention, step (3) involves optimizing and adjusting the throughput and transportation method of hazardous chemicals in the third time period based on the effect evaluation results of the second time period. This process is divided into two cases: ① If there is only one mode of transportation for the inbound or outbound transport of hazardous chemicals: Based on the results of the effectiveness assessment level, the numerical value of the predicted hazardous chemical throughput is optimized and adjusted to obtain the adjusted predicted hazardous chemical throughput. ② There are two scenarios for the transportation of hazardous chemicals in or out: taking into account the effectiveness assessment results of the two transportation methods, the forecast of hazardous chemical throughput and the proportion of the two transportation methods will be adjusted.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention is an optimization method based on cargo and planning data, transportation mode data, equipment configuration data, equipment performance data, fee revenue data, equipment cost data, and historical operating data. It has reliable data support, and the method is closely integrated with the actual transportation characteristics of the port, making it highly implementable.

[0017] This invention, based on the prediction of future hazardous chemical throughput, makes an initial proportional allocation of transportation operations in conjunction with specific benefits; it provides feedback on the effect of the initial proportional allocation from the perspectives of operational efficiency and operational stability; and based on the rating results, it makes targeted optimizations and adjustments to subsequent throughput forecasts and the proportion of transportation modes, and continuously cycles through this process; the entire process is a closed-loop iterative optimization process, dynamically adjusting the operational proportion of each transportation mode, significantly improving the overall port operating revenue while ensuring relatively stable operations, and achieving optimized allocation of port resources, including equipment, storage capacity, and operating time. Attached Figure Description

[0018] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Figure 1 This is the overall flowchart of the present invention, combined with Figure 1 The present invention will now be described in further detail. The present invention operates on a monthly cycle, with the first ten days of each month as the first period, the middle ten days as the second period, and the last ten days as the third period, with a cycle of three months.

[0021] I. Collecting core data on hazardous chemical port cargo transportation 1. Basic data on goods and plans As shown in Table 1, the hazardous chemicals transiting through the hazardous chemical port are vegetable oil, ethylene glycol, hydrochloric acid, 98% H₂SO₄, 32% NaOH, 50% NaOH, 48% KOH, 30% CaCl₂, gasoline, diesel, and jet fuel. The numbers represent the concentration of the hazardous chemicals. The minimum operational standards that must be met for the import or export of each hazardous chemical are as follows: H ij , H ic (m³); Since the operations at the berths along the wharf include the direct unloading, loading, and unloading of hazardous chemicals by truck and ship, and the berths are divided into chemical berths and refined oil berths, the maximum load capacity for ship transportation at the wharf for chemical berths and refined oil berths are respectively... H mt1 , H mt2(m³), the wharf's ship transportation methods include direct unloading from trucks to ships, unloading from ships to storage tanks, and loading hazardous chemicals from storage tanks onto ships. A dedicated tanker parking area is provided at the wharf's front for direct unloading from trucks to ships. Direct unloading from trucks to ships means that hazardous chemicals are unloaded directly from ships into tankers without passing through storage tanks, or directly from tankers onto ships. The road loading area has two loading sheds, with separate sheds for chemicals and refined oil products. Therefore, the maximum load capacity for road loading of chemicals and refined oil products is respectively... H gz1 , H gz2 (m³); Meanwhile, the unloading areas for chemicals and refined oil products are also arranged separately, so the maximum unloading capacity of chemicals and refined oil products on highways is respectively... H gx1 , H gx2 (m³). It should be noted that the minimum operating standard value and the port's maximum operating load capacity are statistics for a certain period of time.

[0022] Table 1: Basic Data on Goods and Plans

[0023] 2. Transportation mode data As shown in Table 2, there are six modes of cargo transportation in hazardous chemical ports: unloading from ships to storage tanks, loading hazardous chemicals from storage tanks onto ships, unloading from tank trucks to storage tanks, loading hazardous chemicals from storage tanks onto tank trucks, unloading from tank trucks directly onto ships without passing through storage tanks, and unloading from ships directly onto tank trucks without passing through storage tanks. These are denoted as follows: M 1~ M 6. The respective process flows are shown in Table 2. As shown in Table 3, the methods of transporting hazardous chemicals in or out vary depending on the actual operation of the port. At the same time, there are a maximum of two methods for transporting hazardous chemicals in or out.

[0024] Table 2: Transportation methods involved in hazardous chemical ports

[0025] Table 3: Methods of transporting various hazardous chemicals in and out

[0026] 3. Equipment configuration data In the transportation of hazardous chemicals at ports, the main core energy-consuming equipment includes various pumps and motors, oil and gas recovery devices, and acid gas treatment devices. Among these, pumps and motors are categorized according to requirements into ship-mounted pumps, ship loading pumps, road loading pumps, and road unloading pumps, as shown in Table 2. M 1~ MThe pumps used for the six modes of transportation are ship-mounted pumps, ship-loading pumps, road unloading pumps, road loading pumps, road unloading pumps, and ship-mounted pumps, respectively. According to the design specifications, a 300-type gasoline vapor recovery device is used for ship loading at the dock to meet the vapor recovery requirements of gasoline loading, while an 800-type gasoline vapor recovery device is used for road loading to meet the vapor recovery requirements of gasoline loading. The acid gas collected during sulfuric acid loading needs to be sent to an alkaline washing tank for recovery and treatment. The treated liquid is discharged into a neutralization tank and discharged after the liquid pH reaches the standard.

[0027] 4. Equipment performance data As shown in Table 4, the equipment performance data mainly refers to the flow data of various pumps, namely the flow data per unit time (m³ / h) of ship-mounted pumps, loading pumps, truck-loading pumps, and unloading pumps. The flow data varies depending on the mode of transportation and the type of hazardous chemicals being transported.

[0028] Table 4: Flow Rate of Pumps and Machinery at Hazardous Chemical Ports

[0029] 5. Fee Revenue Data As shown in Table 5, the port operating revenue standard corresponding to the unit volume (m³) of each hazardous chemical loading and unloading, i.e., the loading and unloading fee rate (yuan / m³).

[0030] Table 5: Hazardous Chemicals Port Handling Fees

[0031] 6. Equipment cost data As shown in Table 6, the equipment cost rate is the unit time energy consumption cost (RMB / h) or unit handling volume cost (RMB / m³) generated by the hazardous chemical port equipment during operation. Among them, various pumps have different equipment cost rates depending on the transportation method and the type of hazardous chemicals being transported, in RMB / h; Meanwhile, oil and gas recovery devices are required when loading gasoline onto ships at the dock and onto trucks on roads, and different models of oil and gas recovery devices are available depending on the transportation method. These devices have different cost rates during operation, in RMB / h; sulfuric acid requires acid gas treatment devices during loading, and the charging standard is based on unit volume, in RMB / m³.

[0032] Table 6: Cost Rates for Hazardous Chemical Port Equipment

[0033] 7. Historical Operational Data In actual port operations, it is necessary to collect the actual operational records from the first ten days of the first month as historical port operational data. This includes the quantity of each hazardous chemical transported in or out within a specific time period, i.e., the throughput of hazardous chemicals; the mode of transport used for each hazardous chemical transport and the number of operations for each mode of transport.G The term "operation count" refers to the number of times each pump is used during the transportation of hazardous chemicals. For example, in direct unloading from truck to ship, the number of operations of the road unloading pump is recorded when tank trucks are unloaded directly onto ships without passing through storage tanks (truck→ship); while in direct unloading from ship to tank truck without passing through storage tanks (ship→truck), the number of operations of the ship-mounted pump is recorded.

[0034] II. Calculate benefits, forecast throughput, and preliminarily allocate transportation modes based on historical and rate data. 1. Calculate net income U ( i , m , V ) Given the port's historical operating data, equipment cost data, and fee revenue data, their net profit can be calculated. For a specific hazardous chemical... H i Transportation M i Processing volume V i : (1) Calculate income R ( i , m , V ) ; in, F i The loading and unloading fee rate for this hazardous chemical; k This is the mode coefficient, when the transportation mode is... M 1~ M At 4 o'clock, k Take 1, when the mode of transportation is M 5~ M At 6 o'clock, k Take 0.85 (due to the simplified process of direct unloading by truck and ship, the fee can be appropriately reduced).

[0035] (2) Calculation cost C ( i , m , V ) ①When H i When the hazardous chemical is other than sulfuric acid or gasoline: ; in, Q i The flow rate data of the pumps used for this hazardous chemical; E i Equipment cost rate for the equipment used for this hazardous chemical.

[0036] ②When H i When it is sulfuric acid: ; in, Q i The flow rate of the pump used for this sulfuric acid is 60 m³ / h. E 8 represents the cost rate of the pump during sulfuric acid loading. E 11 Cost rates for using acid gas treatment equipment when loading sulfuric acid onto trucks.

[0037] ③When H i When using gasoline: ; in, Q i Flow data for the pump used for this gasoline: when using M 2. Pump flow rate during transportation Q i It is 200 m³ / h; when using M 4. Pump flow rate during transportation. Q i It is 100 m³ / h. E i Cost rate of the pump for gasoline transportation E j Cost rates for using oil and gas processing equipment when transporting gasoline: When adopting M 2. Transportation methods E i for E 3, E j for E 9; When adopting M 2. Transportation methods E i for E 7, E j for E 10 .

[0038] (3) Calculate net income U ( i , m , V ) ; It is important to note that in actual port operations, among the various modes of transportation for hazardous chemicals... R / C >1 indicates that with volume VAs the volume of hazardous chemicals increases, so does the revenue, meaning that the growth rate of revenue is greater than the growth rate of costs. The larger the volume of hazardous chemicals, the greater the net profit.

[0039] 2. Calculate the operating efficiency value per unit time. A i After calculating the net profit, you can divide the net profit by the time taken to transport each hazardous chemical in or out to obtain the operating efficiency per unit time. ; in, t g The necessary preparation time for loading and unloading goods is taken as 0.5 hours per operation.

[0040] After calculating the unit-time operational efficiency value, the unit-time operational efficiency values ​​generated by each mode of transportation for all hazardous chemicals are sorted to obtain the sorting results. P .

[0041] 3. Forecast of hazardous chemical throughput in mid-month Considering the continuous nature of production planning, greater emphasis is placed on the impact of recent data on production operations in the next time period. This involves dividing a time period into two phases and increasing the weighting of the next phase. This allows for the prediction of the volume of hazardous chemicals being transported in or out, as shown in the following formula: ; in: T 1i This refers to the amount of the hazardous chemical that was transported in or out in the previous stage; T 2i This refers to the amount of the hazardous chemical that will be transported in or out in the next stage.

[0042] 4. Preliminary adjustments to hazardous chemical transportation methods in mid-month ① When there is only one way to transport hazardous chemicals in or out, it is not necessary to change the proportion of the transportation method of the hazardous chemicals, that is, the proportion of the transportation method is 100%.

[0043] ② When there are two methods for transporting hazardous chemicals in or out ; Here, we assume that the two modes of transportation for a certain hazardous chemical to be transported in or out are respectively M m , M n Their corresponding unit time operational efficiency values ​​are respectively A m , A n .

[0044] The above-mentioned forecasts for hazardous chemical throughput and preliminary adjustments to hazardous chemical transportation methods can be implemented with reference in the middle of the first month. The implementation method is to adjust the proportion of each transportation method according to the volume of hazardous chemicals transported in or out (e.g., the proportion of each method initially allocated). M m 60% M n M m (40%) of the transportation operations for hazardous chemicals are arranged.

[0045] III. Compare and analyze operational data and assign scores across two dimensions to evaluate the effectiveness of the preliminary allocation results. Collect actual operating data from the first month after the adjustment and compare it with the actual operating data from the first ten days of the month. Judge the effect of the adjustment from two dimensions: "operational efficiency" and "operational stability".

[0046] 1. Calculate the operational efficiency index value B 1 Subtract the net profit from the operating data at the beginning of the month from the net profit in the mid-month operating data to obtain the difference. The difference is obtained by subtracting the sorted unit-time operational efficiency values ​​from the mid-month operational data from the sorted unit-time operational efficiency values ​​of the early-month operational data. Taking into account both net income and operational efficiency per unit time, the preliminary adjusted plan was evaluated, and the weighted scores for its effectiveness are shown in Table 7 below: Table 7: Weighted Score Table for Benefit Performance

[0047] 2. Calculate the stability index value of the operation. B 2 The number of operations for each mode of transportation in the mid-month operational data is subtracted from the number of operations for each mode of transportation in the early-month operational data to obtain a difference. This difference is then compared with the number of operations in the early-month data to determine the fluctuation in the number of operations. The calculation method is shown in the following formula: ; in, G i No. i The number of assignments within a given time period.

[0048] The fluctuations are categorized into four levels, and the weighted scores for the specific number of operations are shown in Table 8 below. Table 8: Weighted Score Table for Number of Assignments

[0049] 3. Calculate the performance evaluation score. D iAnd conduct an effectiveness evaluation and level determination. (1) Calculate the effect level score D i The weighted average method was used to score and rate the initial adjustment effect from the perspectives of operational efficiency and operational stability. The specific formula is as follows: ; (2) Determine the level of effectiveness evaluation. ① When 4≤ D i When the value is ≤3.6, the rating is "Excellent", indicating that the operational efficiency and stability are relatively excellent. ② When 3.4≤ D i When the score is ≤2, the rating is "good", indicating that either the operational efficiency or the operational stability is good. ③ When 1.8≤ D i When the score is ≤1, the rating is "average", indicating that the operational efficiency and stability are relatively average.

[0050] IV. Implement differentiated optimization and adjustment strategies based on performance evaluation levels. First, using the methods employed in the first ten days of the month, a preliminary forecast of the throughput of hazardous chemicals in the second ten days is made. Then, based on the effectiveness assessment results of each mode of transportation for each type of hazardous chemical, the transportation methods for the second ten days are optimized and adjusted, in two scenarios: (1) There is only one mode of transportation for the hazardous chemicals to be transported in or out. For hazardous chemicals that rely on only one mode of transportation, port operating revenue cannot be increased by adjusting the proportion of transportation modes. Instead, the throughput forecast for hazardous chemicals can be adjusted based on the effectiveness level assessment results. The volume of hazardous chemicals with better assessment results can be increased, thereby increasing port operating revenue.

[0051] ①The effectiveness evaluation level is "excellent". Implementation plan ①: Increase the volume of hazardous chemicals by 20% based on the forecast value for the second half of the month (the increase ratio can be adjusted according to the actual situation).

[0052] ② If the effectiveness assessment level is "good", implement plan ②: do not change the forecast value of hazardous chemical throughput in the second half of the month. In this case, the port revenue will still be positive, but the relative growth rate will be less than that of hazardous chemicals with an effectiveness assessment level of "excellent".

[0053] ③ The effectiveness evaluation level is "average". Implementation plan ③: Based on the predicted value of hazardous chemical throughput in the second half of the month, reduce it by 10% (the reduction ratio can be adjusted according to the actual situation). At the same time, the throughput of hazardous chemicals shall not be less than the minimum operating standard value for the transportation of hazardous chemicals in or out.

[0054] (2) There are two modes of transportation for the entry or exit of hazardous chemicals. In both cases, assume that the transportation mode with the highest operational efficiency per unit time is... M a The transportation mode ranked second in terms of operational efficiency per unit time is M b The execution plan is shown in Table 9 below: Table 9: Implementation Plan Table

[0055] Option 1: Do not change the proportion of transportation methods (if the effect evaluation level is excellent under both modes, it indicates that the proportion of transportation methods is very reasonable, so the proportion of transportation methods will not be changed); at the same time, increase the volume of hazardous chemicals by 20% based on the forecast value for the throughput in the second half of the month (the increase ratio can be adjusted according to the actual situation). Option 2: Do not change the proportion of transportation modes (if one mode is rated as excellent and the other as good, it indicates that the proportion of transportation mode is relatively reasonable, so the proportion of transportation mode will not be changed); at the same time, increase the predicted throughput of hazardous chemicals in the latter half of the month by 10% (the increase percentage can be adjusted according to the actual situation; since the evaluation level of the proportion of transportation mode is slightly weaker than that of Option 1, the increase percentage of the predicted throughput is relatively lower). Option 3: Do not change the proportion of transportation modes (if the effect evaluation level is good under both modes, it indicates that the proportion of transportation modes is relatively balanced, so do not change the proportion of transportation modes); do not change the predicted value of the hazardous chemical throughput; Option 4: The proportion of transportation methods with an effectiveness evaluation rating of "Excellent" will be increased by 0.20 based on the original proportion of transportation methods (the increase ratio can be adjusted according to the actual situation; if one of the two modes has an effectiveness evaluation rating of "Excellent" and the other is "Average", it indicates that the proportion of that transportation method is unreasonable, so the proportion of the transportation method with an effectiveness evaluation rating of "Excellent" will be increased); the predicted value of the hazardous chemical transportation volume will not be changed. Option 5: The proportion of transportation methods with an effectiveness rating of "Good" will be increased by 0.10 based on the original proportion of transportation methods (the increase ratio can be adjusted according to the actual situation; if one of the two modes has an effectiveness rating of "Good" and the other has an effectiveness rating of "Average", it indicates that the proportion of that transportation method is not reasonable, so the proportion of transportation methods with an effectiveness rating of "Good" will be increased); the predicted value of the hazardous chemical transportation volume will not be changed. Option Six: Maintain the same proportion of transportation modes (if the effectiveness evaluation level is "average" under both modes, indicating a relatively balanced proportion of transportation modes, but the operational efficiency and stability are not ideal, then the proportion of transportation modes will not be changed); reduce the predicted throughput of hazardous chemicals in the latter half of the month by 10% (the reduction percentage can be adjusted according to the actual situation), while the throughput of hazardous chemicals must not be less than the minimum operational standard value for the inbound or outbound transport of hazardous chemicals. This optimized adjustment plan will be implemented as a reference during actual operation in the latter half of the month, and historical operational data will be collected after the actual operation in the latter half of the month.

[0056] V. Iteratively optimize processes to form a sustainable closed-loop management system. The cycle is based on one month, divided into the first, middle, and last ten days of the month, with a three-month cycle.

[0057] The actual operational data generated in the first ten days of the first month is used as historical operational data. This data is used to forecast the throughput of hazardous chemicals and make preliminary allocations of transportation methods in the middle of the month, and is then implemented as a reference during actual operations in the middle of the month. Adjusted actual operational data for the middle of the month is collected and compared with the data from the first ten days. The effectiveness of the preliminary allocation results is evaluated, and differentiated optimization and adjustment strategies are implemented based on the effectiveness evaluation level, and are then implemented as a reference during actual operations in the latter half of the month. The actual operational data generated in the latter half of the first month is used as historical operational data. This data is used to forecast the throughput of hazardous chemicals and optimize and adjust transportation methods in the first ten days of the second month. The forecasting and adjustment methods are similar to those used in the preparation phase from the middle to the end of the first month, and are then implemented as a reference during actual operations in the middle of the month. This iterative cycle continues until the optimized solution meets the upper and lower limits of port cargo transportation. That is, the preliminary or optimized adjustments to the above-mentioned hazardous chemical transportation methods must meet the minimum operating standards for each hazardous chemical, and the turnover transportation of all hazardous chemicals must not exceed the maximum operating capacity of the hazardous chemical port. When the solution reaches the above optimal state, that is, when the transportation solution meets the upper and lower limits of port cargo transportation, the transportation solution continues to be used in the next time period. It should be noted that when implementing the initial allocation or optimization adjustment plan, the actual operation of the port should be the primary consideration. The actual throughput of hazardous chemicals should not exceed 20% of the forecast value. If the operation plan exceeds the port throughput forecast, it is recommended to arrange the operation at other ports.

[0058] The process is carried out in three-month cycles. After each cycle, the process starts again from collecting historical operational data, to initial allocation, to optimization and adjustment until the optimal situation is reached, which is in line with the actual operation of the hazardous chemical port and also maximizes the operational efficiency of the hazardous chemical port.

[0059] VI. Case Studies Assume that the minimum operating standards and maximum load capacity of hazardous chemical cargo at a certain hazardous chemical port per ten days are as shown in Table 10. The minimum operating standards for the direct unloading of vegetable oil, ethylene glycol, and hydrochloric acid by truck or ship are 900, 740, and 710 m³, respectively; the minimum operating standard for the inbound or outbound transport of 98% H₂SO₄ is 450 m³; the minimum operating standard for the inbound or outbound transport of 32% NaOH is 1000 m³; the minimum operating standard for the inbound or outbound transport of 50% NaOH is 330 m³; the minimum operating standard for the inbound or outbound transport of 48% KOH is 220 m³; the minimum operating standard for the inbound or outbound transport of 30% CaCl₂ is 650 m³; the minimum operating standard for the inbound or outbound transport of gasoline is 3500 m³; the minimum operating standard for the inbound or outbound transport of diesel is 2000 m³; and the minimum operating standard for the inbound or outbound transport of aviation kerosene is 1100 m³. The maximum operating load capacity for loading chemicals and refined oil products by road is 43,400 and 47,000 m³, respectively; the maximum operating load capacity for unloading chemicals and refined oil products by road is 44,200 and 79,000 m³, respectively; and the maximum operating load capacity for ship transportation at the chemical and refined oil product terminals is 83,000 and 79,000 m³, respectively.

[0060] Table 10: Basic Data on Goods and Plans

[0061] The flow rates of various pumps are shown in Table 11. The flow rates of the ship-mounted pump and the ship loading pump for refined oil are 200 and 200 m³ / h, respectively; the flow rates of the ship-mounted pump and the ship loading pump for chemicals are 100 and 120 m³ / h, respectively; the flow rates of the road unloading pump and the road loading pump for refined oil are 200 and 100 m³ / h, respectively; and the flow rates of the road unloading pump and the road loading pump for chemicals are 120 and 60 m³ / h, respectively.

[0062] Table 11: Flow Rate of Pumps and Machinery at Hazardous Chemical Ports

[0063] The loading and unloading rates for chemical cargo are shown in Table 12. The loading and unloading rates for vegetable oil, ethylene glycol, hydrochloric acid, 98% H2SO4, 32% NaOH, 50% NaOH, 48% KOH, 30% CaCl2, gasoline, diesel, and jet fuel are RMB 8.74, 10.74, 11.21, 17.48, 12.83, 14.25, 14.35, 12.16, 11.18, 12.60, and 11.85 per cubic meter, respectively.

[0064] Table 12: Hazardous Chemicals Port Handling Fees

[0065] The cost rates for hazardous chemical port equipment are shown in Table 13. Among them, the energy consumption of ship-mounted pumps for refined oil and chemicals is RMB 85 and RMB 45 / h, respectively; the energy consumption of ship-loading pumps for refined oil and chemicals is RMB 90 and RMB 50 / h, respectively; the energy consumption of road unloading pumps for refined oil and chemicals is RMB 40 and RMB 35 / h, respectively; the energy consumption of road loading pumps for refined oil and chemicals is RMB 35 and RMB 30 / h, respectively; the energy consumption of 300-type and 800-type oil and gas recovery devices is RMB 60 and RMB 80 / h, respectively; and the energy consumption of sulfuric acid gas treatment device is RMB 0.9 / m³.

[0066] Table 13: Cost Rates for Hazardous Chemicals Port Equipment

[0067] Table 14 shows the historical operational data of a hazardous chemical port in the first ten days of a certain month, divided into the upper and lower phases, recording the throughput and number of operations for each mode of transport for each hazardous chemical. It is also known that the vessels passing through this hazardous chemical port are 1000-ton class hazardous chemical vessels, carrying hazardous chemical cargo with a maximum content of 1300 m³ for refined oil and 900 m³ for chemical products; the maximum content of hazardous chemical cargo carried by tank trucks is 40 m³.

[0068] Table 14: Historical Operational Data of Hazardous Chemical Ports in the First Ten Days of a Certain Month

[0069] 1. Based on historical operational data, calculate the net revenue and unit-time operational efficiency value for each mode of transportation of hazardous chemicals in the first ten days of the month, and rank the unit-time operational efficiency values. The historical operational data from the two phases are combined for calculation, resulting in the calculation table shown in Table 15 below. Among them: (1) For H 1. Adopt M 5. Transportation methods, throughput of 780m³, and 20 operations. Because direct unloading by truck and ship is used, the mode coefficient is... k Take 0.85, and use a highway unloading pump; pump flow rate... Q i For a capacity of 120 m³ / h, the equipment cost rate is... E i It costs 35 yuan per hour. H 1. Loading and unloading rates for vegetable oil F i The price is 8.74 yuan / m³. Therefore: ① Income R : ; ② Cost C : ; ③ Net income U : ; ④ Operational efficiency value per unit time A : ; The calculation methods for the net revenue and unit-time operating efficiency value of the remaining hazardous chemicals are the same as above, with the following differences: ① H 4. Adopt M 4. Shipments out of the country: The cost calculation differs slightly because 98% H2SO4 requires an acid gas treatment device during loading. ; ② H 9 adopted M 2. Shipments are exported. The cost calculation differs slightly because gasoline requires a vapor treatment unit during loading. ; ③ H 9 adopted M 4. Shipping out, where the cost calculation differs due to the need for an oil and gas treatment device during gasoline loading: ; The operational efficiency values ​​per unit time were then sorted, and the sorting results are shown in Table 15 below.

[0070] Table 15: Calculation Table for the First Ten Days of the Month

[0071] 2. Forecast the throughput of hazardous chemicals in mid-month and make preliminary allocations for transportation methods. The throughput of hazardous chemicals in mid-month was predicted using historical operational data collected from two phases. H 1. Adopt M 5. Taking transportation methods as an example: The throughput forecasting method for the other hazardous chemicals transportation modes is the same, and the results are shown in Table 15. All hazardous chemicals meet the minimum operating standard value and the port's maximum operating load capacity.

[0072] The initial allocation of transportation modes is calculated by merging the two phases of historical operational data. H 1. Adopt M 5. M Taking transportation methods as an example, for hazardous chemical goods... H 1. Adopt M The proportion of 5 modes of transportation is For hazardous chemical goods H 1. Adopt M The proportion of 6 modes of transportation is For other hazardous chemicals transported in or out using two modes of transport, the preliminary allocation calculation method is the same, and the results are shown in Table 15.

[0073] 3. Based on the forecast of hazardous chemical throughput and the preliminary allocation of transportation methods, the preliminary allocation results will be implemented with reference during actual operation in the middle of the month, and the effectiveness of the preliminary allocation results will be evaluated. Based on the forecast of hazardous chemical throughput in mid-month and the preliminary allocation of transportation modes, the actual port operation data for mid-month is shown in Table 16.

[0074] Table 16: Actual Operational Data of Hazardous Chemical Ports in a Certain Month

[0075] Based on the above calculation method, the port's net revenue and operating efficiency per unit time were calculated in the middle of the month, and the operating efficiency per unit time was sorted. At the same time, a preliminary forecast of the throughput of hazardous chemicals in the second half of the month was made. The calculation results are shown in Table 17 below.

[0076] Based on the actual port operation data in mid-month, the effectiveness of the preliminary allocation plan for the first ten days of the month was evaluated. The evaluation results are shown in Table 18 below. Among them, [the following data is presented]. H 1. Adopt M 5. Taking transportation methods as an example: Due to ΔU >0, ΔP =0, then B 1 = 4; at the same time ,but B 2=4, so the performance evaluation score is If the effectiveness evaluation level is "Excellent", then the evaluation level is "Excellent". The evaluation methods for the effectiveness evaluation levels of other transportation modes of hazardous chemicals are as above, and the results are shown in Table 18 below.

[0077] Table 17: Mid-month Calculation Table

[0078] Table 18: Mid-month Performance Evaluation

[0079] 4. Implement differentiated optimization and adjustment strategies based on the performance evaluation level, and iteratively optimize the process. Implement differentiated optimization and adjustment strategies based on the performance evaluation level: (1) For example, with H 1. Adopt M 5. M Taking transportation methods as an example, there are two scenarios for transporting hazardous chemicals in or out. The transportation method with the highest unit-time operational efficiency is... M 6. The effectiveness evaluation level was good, ranking second. M 5. If the effectiveness evaluation level is excellent, then implement Plan Two, without changing the proportion of transportation methods, that is... M 5% accounted for 0.34%. MThe proportion of 6 is 0.66; at the same time, based on the forecast of hazardous chemical throughput in the second half of the month, it is increased by 10%, that is, based on the preliminary forecast of hazardous chemical throughput, the final adjusted hazardous chemical throughput is 2520×110%=2772m³.

[0080] For example, with H 2. Adopt M 5. M Taking transportation methods as an example, there are two scenarios for transporting hazardous chemicals in or out. The transportation method with the highest unit-time operational efficiency is... M 6. The effectiveness evaluation level was good, ranking second. M 5. If the effectiveness evaluation level is good, then implement Plan 3, without changing the proportion of transportation methods, that is... M 5% accounted for 0.34%. M 6 accounted for 0.66%; meanwhile, the predicted throughput of this hazardous chemical remains unchanged, that is, the hazardous chemical... H 2. The throughput forecast remains at 4180m³.

[0081] For example, with H 5. Adopt M 4. M Taking transportation methods as an example, there are two scenarios for transporting hazardous chemicals in or out. The transportation method with the highest unit-time operational efficiency is... M 4. The effectiveness evaluation level is average, ranking second. M 5. If the effectiveness evaluation rating is "Excellent", then implement Plan Four. The proportion of transportation methods with an "Excellent" effectiveness evaluation rating will increase by 20% based on the original proportion of transportation methods, which means the final... M 4 accounted for 0.38. M 5 accounted for 0.62%; meanwhile, the predicted throughput of this hazardous chemical remains unchanged, that is, the hazardous chemical... H The outbound throughput forecast remains at 3680m³.

[0082] For example, with H 6 adopts M 4. M Taking transportation methods as an example, there are two scenarios for transporting hazardous chemicals in or out. The transportation method with the highest unit-time operational efficiency is... M 4. The effectiveness evaluation level is average, ranking second. M 5. If the effectiveness evaluation level is "moderate," then implement Plan 6, without changing the proportion of transportation methods, which means the final... M 4 accounted for 0.59. M The proportion of 5 was 0.42; meanwhile, based on the forecast for hazardous chemicals throughput in the latter half of the month, it was reduced by 10%, that is, for hazardous chemicals... HThe predicted outbound throughput is 3420 m³, which meets the minimum operating standard for this hazardous chemical.

[0083] For example, with H 10 use M 2. M Taking transportation methods as an example, there are two scenarios for transporting hazardous chemicals in or out. The operational efficiency per unit time is ranked first among the two. M 2. The effectiveness evaluation level is average, ranking second. M 4. If the effectiveness evaluation level is "Good", then implement Plan 5. The proportion of transportation methods with an effectiveness level of "Good" will increase by 0.10 from the original proportion of transportation methods, that is, the final... M 2 accounted for 0.74. M 4 accounted for 0.26%; meanwhile, the predicted throughput of this hazardous chemical remains unchanged, that is, the hazardous chemical... H 10 The outbound throughput forecast remains at 6000 m³.

[0084] The transportation methods for other hazardous chemicals entering or leaving fall into two categories, and the optimization and adjustment strategies are consistent with the methods described above.

[0085] (2) For example, with H 4. Adopt M Taking the transportation method of hazardous chemicals as an example, if the transportation method of hazardous chemicals is used for both inbound and outbound transportation, the effect evaluation level is general, and the implementation plan ③ is adopted. Based on the predicted value of hazardous chemicals throughput in the second half of the month, the throughput is reduced by 10%, that is, the final adjusted hazardous chemicals throughput is 1880×90%=1692m³, which meets the minimum operating standard value of the hazardous chemicals.

[0086] For example, with H 4. Adopt M 4. Taking the transportation method of hazardous chemicals as an example, if the transportation method of hazardous chemicals is either for import or export, the effect evaluation level is excellent, and the implementation plan ① is adopted. Based on the predicted value of hazardous chemicals throughput in the second half of the month, the throughput is increased by 20%, that is, the final adjusted hazardous chemicals throughput is 560×120%=672m³.

[0087] For example, with H 5. Adopt M Taking the transportation method of hazardous chemicals as an example, if the transportation method for hazardous chemicals is either for inbound or outbound transport, and the effectiveness evaluation level is good, then Plan ② will be implemented without changing the forecast value for the throughput of hazardous chemicals in the latter half of the month. H 2. The throughput forecast remains at 1280m³.

[0088] The other modes of transportation for hazardous chemicals entering or leaving the country are considered as one case, and the optimization and adjustment strategies are consistent with the methods described above.

[0089] The final optimized adjustment plan for all transportation modes of hazardous chemicals is shown in Table 17. This plan was implemented as a reference during the actual port operations in the latter half of the month, and verification showed that it met the port's maximum operational capacity. Actual port operation data was collected in the latter half of the month and compared with data from the middle of the month to optimize and adjust the transportation plan. This was then implemented as a reference during the first ten days of the next cycle. This process was iterated until all hazardous chemicals met the minimum operational standards while also not exceeding the port's maximum operational capacity. A cycle consisted of three periods. After three periods, the iteration restarted, starting with collecting historical operational data, initial allocation, and iterative adjustments and optimizations to transportation modes to align with the actual operation of the hazardous chemical port and optimize its operational efficiency.

[0090] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for optimizing and adjusting the transportation mode of hazardous chemical port cargo, considering operational efficiency, characterized in that, Includes the following steps: (1) Collect data related to hazardous chemical port and cargo transportation, as well as operational data for the first time period, and calculate the net revenue and unit time operational efficiency value of each optional transportation mode for each hazardous chemical in the first time period. (2) Use the throughput of each hazardous chemical in the port in the first time period to predict the throughput of each hazardous chemical in the second time period; make a preliminary allocation of transportation modes based on the unit time operation efficiency value of each transportation mode for each hazardous chemical; collect the actual operation data of the adjusted second time period and compare it with the actual operation data of the first time period, and evaluate the effect of the preliminary allocation results from the two dimensions of "operation efficiency" and "operation stability". (3) Using the actual operating data of the second time period and the unit time operating efficiency value of each transportation mode for each hazardous chemical, first predict the throughput of each hazardous chemical in the third time period, and make a preliminary allocation of transportation modes for each hazardous chemical; then, based on the level judgment result of the effect evaluation of the second time period, optimize and adjust the throughput and transportation mode of hazardous chemicals in the third time period. (4) Following the method in step (3), optimize and adjust the transportation methods for each time period in turn until the optimization scheme meets the upper and lower limits of port cargo transportation. All turnover transportation schemes for hazardous chemicals must not exceed the maximum operating load capacity of the hazardous chemical port.

2. The method for optimizing and adjusting the transportation mode of hazardous chemical port cargo considering operational efficiency as described in claim 1, characterized in that, The data related to cargo transportation in step (1) includes cargo and planning basic data, transportation mode data, equipment configuration data, equipment performance data, rate revenue data, and equipment cost data.

3. The method for optimizing and adjusting the transportation mode of hazardous chemical port cargo considering operational efficiency as described in claim 2, characterized in that, For a certain hazardous chemical H i Transportation M i Processing volume V i The formula for calculating its net income is as follows: (1) Calculate income R ( i , m , V ) ； in, F i The loading and unloading fee rate for this hazardous chemical; k These are the mode coefficients; (2) Calculation cost C ( i , m , V ) ①When H i When the hazardous chemical is other than sulfuric acid or gasoline: ； in, Q i The flow rate data of the pumps used for this hazardous chemical; E i Equipment cost rate for the equipment used for this hazardous chemical; ②When H i When it is sulfuric acid: ； in, Q i The flow rate data for the pumps used to process the sulfuric acid; E 8 represents the cost rate of the pump during sulfuric acid loading. E 11 Cost rates for using acid gas treatment equipment when loading sulfuric acid onto trucks; ③When H i When using gasoline: ； in, Q i This refers to the flow rate data of the pump used for this gasoline. E i Cost rate of the pump for gasoline transportation E j The cost rate for using oil and gas treatment equipment when transporting gasoline; (3) Calculate net income U ( i , m , V ) 。 4. The method for optimizing and adjusting the transportation mode of hazardous chemical port cargo considering operational efficiency as described in claim 1, characterized in that, For a certain hazardous chemical H i Transportation M i Processing volume V i Its unit time operating efficiency value A i The calculation formula is as follows: ； in, Indicates net income, Q i The flow rate data for the pumps used to process this hazardous chemical. t g The necessary preparation time for loading and unloading goods.

5. The method for optimizing and adjusting the transportation mode of hazardous chemical port cargo considering operational efficiency as described in claim 1, characterized in that, In the process of forecasting the throughput of hazardous chemicals, considering the continuous nature of production planning, more emphasis is placed on the impact of recent data on production operations in the next time period. This involves dividing the previous time period into two phases and increasing the weighting of the next phase on the volume of each hazardous chemical being transported in or out. The prediction formula is as follows: ； in: T 1i This refers to the amount of the hazardous chemical that was transported in or out in the previous stage; T 2i This refers to the amount of the hazardous chemical that will be transported in or out in the next stage.

6. The method for optimizing and adjusting the transportation mode of hazardous chemical port cargo considering operational efficiency as described in claim 1, characterized in that, The preliminary allocation of modes of transportation for hazardous chemicals is as follows: ① When there is only one mode of transport for hazardous chemicals, the proportion of that mode of transport does not need to be changed, that is, the proportion of that mode of transport is 100%; ② When there are two methods for transporting hazardous chemicals in or out: ； Here, we assume that the two modes of transportation for a certain hazardous chemical to be transported in or out are respectively M m , M n Their corresponding unit time operational efficiency values ​​are respectively A m , A n , Indicates the mode of transportation used for hazardous chemicals M m The initial allocation amount.

7. The method for optimizing and adjusting the transportation mode of hazardous chemical port cargo considering operational efficiency as described in claim 1, characterized in that, The preliminary allocation results were evaluated as follows: The operational efficiency index and operational stability index values ​​were obtained by using the actual operational data of the adjusted second time period to quantify the "operational effectiveness" and "operational stability". The weighted average method is used to combine the operational efficiency index value and the operational stability index value to calculate the final performance evaluation score. The performance evaluation level is then determined based on a pre-set score range.

8. The method for optimizing and adjusting the transportation mode of hazardous chemical port cargo considering operational efficiency as described in claim 7, characterized in that, The process of obtaining operational efficiency indicator values ​​that quantify "operational effectiveness" is as follows: Subtract the net profit from the previous period's operating data from the net profit of the current period's operating data to obtain the difference. The difference is calculated by subtracting the sorted unit-time operational efficiency values ​​from the previous time period's operational efficiency values ​​from the sorted unit-time operational efficiency values ​​in the current time period's operational data. ; Using a scoring matrix, the difference is... and difference This translates into a quantifiable operational efficiency score.

9. The method for optimizing and adjusting the transportation mode of hazardous chemical port cargo considering operational efficiency as described in claim 1, characterized in that, The process of quantifying the job stability index value of "job stability" is as follows: The fluctuation in the number of tasks was statistically analyzed and calculated, and the calculation method is shown in the following formula: ； in, G i No. i The number of assignments within a given time period; The preset threshold for the fluctuation range of the number of operations is used to quantify and score the results, thus obtaining the final operation stability index value.

10. The method for optimizing and adjusting the transportation mode of hazardous chemical port cargo considering operational efficiency as described in claim 1, characterized in that, In step (3), based on the effect evaluation results of the second time period, the optimization and adjustment of the hazardous chemical throughput and transportation methods for the third time period are divided into two cases: ① If there is only one mode of transportation for the inbound or outbound transport of hazardous chemicals: Based on the results of the effectiveness assessment level, the numerical value of the predicted hazardous chemical throughput is optimized and adjusted to obtain the adjusted predicted hazardous chemical throughput. ② There are two scenarios for the transportation of hazardous chemicals in and out: taking into account the effectiveness evaluation results of the two transportation methods, the forecast of hazardous chemical throughput and the proportion of the two transportation methods will be adjusted.

Images