Dangerous Chemicals Transportation Research Articles

Path planning based on reinforcement learning

With the wide application of mobile robots in industry, path planning has always been a difficult problem for mobile robots. Reinforcement learning algorithms such as Q-learning play a huge role in path planning. Traditional Q-learning algorithm mainly uses - greedy search policy. But for a fixed search factor -greedy. For example, the problems of slow convergence speed, time-consuming and many continuous action transformations (such as the number of turns during robot movement) are not conducive to the stability requirements of mobile robots in industrial transportation. Especially for the transportation of dangerous chemicals, continuous transformation of turns will increase the risk of objects toppling. This paper proposes a new method based on - greedy 's improved dynamic search strategy is used to improve the stability of mobile robots in motion planning. The experiment shows that the dynamic search strategy converges faster, consumes less time, has less continuous transformation times of action, and has higher motion stability in the test environment.

Allocation of Resources for Emergency Response to Coal-to-Oil Hazardous Chemical Accidents under Railway Transportation Mode

Railways of the National Energy Group using their own trains have become an important mode of transportation for coal-to-oil hazardous chemicals. Under the circumstances of the shortage of emergency resources and the coupling of multiple disasters, how to establish an effective and reasonable emergency resource allocation scheme for the railway transportation of dangerous chemicals from a disaster site is of great significance to the national task of ensuring safety for the transportation of energy. This paper focuses on the allocation of emergency rescue resources for railway transportation accidents involving coal-to-oil hazardous chemicals, considering the scenarios of the leakage of coal-to-oil, railway line damage, etc. According to the number of trapped people at the initial moment, the disaster situation and accident type, affected areas, etc., a multi-objective optimization model with the shortest response time of the emergency team and the lowest cost of transporting emergency materials along the railway transportation channel of coal-to-oil hazardous chemicals is constructed, based on the calculation method using the initial weight and the emergency weight assigned by the emergency rescue team. Furthermore, in order to avoid the problem of the weight of the local accident points being too small to participate in a rescue, a bee colony algorithm model based on pre-allocation was designed and compared with two traditional algorithms, allowing the realization of the search and selection of allocation methods. The analysis of the examples shows that the proposed method is efficient and fast, and the research results are practical and feasible, which can provide a scientific basis for the rapid decision of emergency rescue resource allocation in multi-disaster scenarios for large energy groups, and provide a reference for the allocation of public security emergency resources in the national emergency response.

Study on safety evaluation of hazardous chemicals transportation industry in Capital city based on principal component analysis and cluster analysis

With the reform of chemical transportation industry accelerating, the safety evaluation of chemical transportation industry in China is becoming more and more standardized. Based on the theory of big data analysis and SPSS software as a platform, first of all, of the Beijing 91 the system construction and management of dangerous chemicals transportation enterprises, safety culture, safety production standardization 24 safety evaluation indexes such as principal component analysis, it is concluded that safety training basic requirements, loading and unloading operation, parking lot, civil air defense, vehicle dynamic supervision, system construction and management, safety production standardization, pilot eight kinds of factors as the main indexes for safety assessment. After using the eight indexes of 91 clustering analysis for transport enterprises, the enterprise is divided into five clusters of reasonable results, through the summary of common characteristics within the same cluster enterprises, it is concluded that the handling operation index plays an important role in classification for transport enterprises such as conclusion, can provide reference for other areas. At the same time, the conclusion can be used as a reference for the follow-up safety evaluation of hazardous chemical transportation enterprises, so as to achieve the purpose of targeted safety inspection.

Discussion on Integrated Design of Emergency Storage Facilities for Dangerous Chemicals Transportation Accidents and Bridge Drainage Run off Treatment Facilities of Expressway

Based on the investigation on the collection and treatment of the runoff from the bridge-deck of some expressways involving sensitive water bodies, this paper proposed an integrated design idea of the emergency storage facility and the bridge-deck rainwater runoff treatment facility for the transportation accident of dangerous chemicals in the expressway. The integrated design idea improves the disadvantages of simultaneous treatment of rainwater and accident-water in the bridge-deck runoff treatment system. The process flow, plane layout, functional unit volume design, conversion device, and control system involved in the integrated design are discussed.

Numerical Study on the Leakage and Diffusion of Insoluble Dangerous Chemicals from Ship in Inland River

Considering the accidents of ships for dangerous chemicals transportation in inland rivers, a numerical method for the simulation of the leakage and diffusion processes of dangerous chemicals in inland rivers is proposed in this paper. Geographic information, such as rivers and buildings in the model, is obtained through Google Earth and structures of rivers and buildings are described by Auto CAD. In addition, the Fluent is adopted to simulate the leakage and diffusion processes of the dangerous chemicals where the standard k-ε model is used to calculate the turbulent flow. Considering the interaction between chemicals and water, the VOF method is used to describe the leakage, drift and diffusion process of dangerous chemicals groups on the water surface. Taking a section of the Yangtze River as an example, the leakage and diffusion processes from a ship carrying 3,000 tons of low-solubility and low-volatile dangerous chemicals are studied, and the characteristics of leakage and diffusion are analyzed in detail. During the simulation, the area of the maximum group of leaked dangerous chemicals reaches up to about 1800 m2 , and the number reaches up to 45. Furthermore, the influence of density, viscosity, water velocity and leakage velocity on the leakage and diffusion processes is investigated in this paper.

Development and Application of Real-time Monitoring System for Dangerous Chemicals Transport Vehicles Based on Internet +

Vehicle transportation accounts for 80% of the dangerous chemicals transport volume in China, and it is of great significance to ensure safe transportation of dangerous chemicals. Based on the idea of Internet +, this paper establishes a real-time monitoring system to realize all-round network management of vehicle information, driving status and security risks. This study designs a radio frequency identification (RFID) system to collect real-time data of dangerous chemicals transport vehicles, using a vehicle information concentrator to collect vehicle data and transmit it through mobile network; based on hardware design, it uses TOMCAT as the application server, Java as the system development language, and MYSQL as the database to develop a background management system for dangerous chemicals transport vehicles, and this system has a vehicle information management platform and a real-time vehicle monitoring platform. The application of the real-time monitoring system shows that the system can collect vehicle information, driver information, etc.; as well as locate the vehicles in real time and realize the danger warning of dangerous chemicals.

Applied Research of Fault Tree Analysis Method of Liquefaction Dangerous Goods Safety Management in the Yangtze River Water Transportation

In recent years, with the rapid development of petroleum, chemical and energy industry around the Yangtze River, the variety and quantity transportation of dangerous chemicals has also dramatically increased through Yangtze River. This paper applies fault tree analysis method of specific LPG to obtain problems existing in the Yangtze river water transportation safety management and according to these series of problem, it puts forward some relevant management measures, hoping to minimum the possibility and damage of potential risk accident so as to the risk control measures more scientific, strict and meticulous.

Research on Cause Analysis and Safety Management for Road Transportation Accidents of Dangerous Chemicals

With increasing transport amount of dangerous chemicals, the number of transportation accidents also rises, thus safe transport of dangerous chemicals becomes more critical. In this article, existing problems in dangerous chemicals transportation and corresponding reasons are analyzed. Through combination of domestic and foreign advanced technology and national conditions, control strategies and measures for safe transportation of dangerous chemicals are studied in depth, in is proposed that preventive measures need to be taken. The preventive measures include establishing a management system, risk early warning mechanism and transport information platform which are based on modern information technology, establishing transport industry standard, ensuring good security propaganda work, setting emergency and consultation service system, carrying out special rectification work for transportation safety, so as to ensure scientific, reasonable and effective control of dangerous chemicals transport, reduce and avoid related accidents.

Simulation Platform of Monitoring and Tracking Micro System for Dangerous Chemicals Transportation

Real test method of monitoring and tracking micro system for dangerous chemicals transportation has many disadvantages: long test cycle, high test cost, high test risk and bad reproducibility. Aimed at these disadvantages, a simulation platform which can be used for the simulation test of monitoring and tracking micro system is developed. This simulation platform is composed of motion simulator and simulation environment. The motion simulator is a kind of parallel robot with Hexaglide structure and has a total of 8 degrees of freedom(DOF). This parallel simulator can not only realize the motion simulation of yaw, pitch and roll, but also provide pure linear motion in the Y direction, which is significant for the acceleration or deceleration simulation. The simulation environment is developed with a sealed cavity, in which a steel tank is used to simulate the tanker for dangerous chemicals transportation. The environment parameters such as temperature, humidity, concentration of combustible gas, the pressure and liquid level in tank can be measured and changed. Based on the motion simulator and the simulation environment, motion parameters such as position, attitude, angular rate, velocity and acceleration and the environment parameters can be measured simultaneously by micro system and standard sensors. With the comparison of these measured data, the micro system can be validated. This simulation platform provides a good test method for the monitoring and tracking micro system and has important significance for dangerous chemicals transportation.

Simulation Environment for Dangerous Chemicals Transportation

Aimed at the disadvantages of real test method for micro system, a simulation environment for dangerous chemicals transportation is developed. This simulation environment is based on the motion simulation platform, which is a kind of Hexaglide operation platform and has a total of 8 dof. With the motion simulation platform and the simulation environment, the motion parameters such as attitude, angular rate, velocity and acceleration and the environment parameters such as temperature, humidity, concentration of combustible gas, the inner pressure and liquid level of tank are measured by micro system and standard sensors simultaneously. With the comparison of test data, the micro system can be validated. In this paper, the structure of motion simulation platform is presented; the hardware structure and integration are described respectively; the software of simulation environment is introduced and some experiment results are shown.

Environmental Risk Evaluation on Integrated Circuit Industry

In order to evaluate the environmental risk of integrated circuit industry, a new integrated circuit chip project was taken as an example to be investigated and analyzed. Its engineering features, process flow, risk identification, risk source intensity and measures to prevent risks were proposed. Risk identification shows that main poisonous and harmful chemicals(PHC) are corrosives and antioxidants, flammable gases and liquids and poisonous gases. Transportation, production and storage risk of PHC and potential accidental risk caused by external factors were proposed. Risk source analysis indicates that the probability of damaging and leaking accidents on facilities is 10-1 times/year. In the case of cylinders leakage, leakage rates of SiF4, Cl2 and ClF3 will be 17 g/s, 8 g/s and 8 g/s respectively. Evaporation rates of isopropyl alcohol, HF and HCl acids are 0.09 g/s. 0.38 g/s and 55 g/s respectively. Finally, Overall layout and construction safety measures, safety precautions on dangerous chemical storage and transportation, technology design and automatic control design, and emergency plan to prevent risk accident were also proponed. This work will be helpful for environmental impact assessment on similar industries.

Discussion on Construction of Control System of Environmental Risk Source for Expressway Transportation Accidents of Dangerous Chemicals in Water Environmental Sensitive Areas

Based on the analysis of the environmental risk characteristics of freeway dangerous chemicals transportation accidents, the environmental risk source control system, which combined the initiative prevention system and passive protection system, are proposed, and the relative subsystems are also elaborated in this article. The risk sources information transfer subsystem is composed by the security regulation platform of regional dangerous goods transportation and highway monitoring and communication system, and the function of the subsystem is transferring the public information between the highway and regional dangerous goods transportation security supervisory. Environmental risk sources prevention subsystem is comprised by the main engineering structures and traffic safety facilities, and the services of environmental accident risk defending platform, which composed by the runoff gathering facilities and reservoir.

Study on the Dangerous Chemicals Transport Vehicles Monitoring System Based on RFID Technique

Study on the Dangerous Chemicals Transport Vehicles Monitoring System Based on RFID Technique

Ocular and Systemic Morbidity Profile in Mass Formic Acid Injuries

A report on formic acid-induced ocular and systemic injuries. Forty-two passengers (84 eyes) with formic acid burns following a tanker and bus collision were evaluated and treated. The severity of ocular chemical injury was assessed using the Roper-Hall classification. Standard protocol for management of ocular chemical burns was adopted in all patients. Immediate irrigation of the eyes was done with tap water and all patients received frequent topical steroids, cycloplegics, and lubricating eye drops. Systemic injuries were evaluated and managed collectively by plastic and orthopedic surgeons and internists. On presentation, 48 (57.14%) eyes had grade 0, 13 (15.48%) eyes had grade I, 16 (19.1%) eyes had grade II, 3 (3.57%) eyes had grade III, and 4 (4.76%) eyes had grade IV chemical injuries. Thirty patients (71.43%) had superficial and 12 (28.57%) had deep skin burns. One (2.38%) patient died due to severe pulmonary edema and 6 (14.29%) patients had severe pulmonary complications requiring oxygen treatment. Seventy-two (87.8%) eyes healed without residual sequelae, 10 (12.2%) eyes had nebulo-macular corneal opacities, and 2 (2.44 %) eyes developed secondary glaucoma and dry eye. Formic acid injuries can lead to a significant ocular and systemic morbidity. Immediate ocular and systemic management is necessary to reduce morbidity and mortality. Strict regulations are needed for the transportation of dangerous chemicals to prevent accidental chemical injuries.

Safety Advantages of On-Site Microprocesses

Usually large-scale capacities are preferred in process industry because of the economics of scale. However, small capacities bring along several other advantages, which are emphasized especially in on-site production. By producing on-site, the transportation of dangerous chemicals can be avoided. Moreover, smaller on-site production processes also mean a step towards inherently safer technology. Microreactors represent a technology that efficiently utilizes safety advantages resulting from small scale. These safety advantages of microreactors in on-site production are studied in this contribution. Production of peracetic acid is used as a test case. This unstable and explosive chemical is used, e.g. in treatment of municipal wastewater and pulp bleaching. This study is based on comparison of a conventional batch process with the capacity of 170 kg/h and an on-site continuous microprocess producing 10 kg/h peracetic acid. Preliminary design of these processes was carried out. Four different methods were used to analyze the safety of the processes. It was found that the conventional methods for analysis of process safety might not be reliable and adequate for radically novel technology, such as microprocesses. This is understandable because the methods are partly based on experience, which is very limited in the connection of totally novel technology.

Risk Analysis of Dangerous Chemicals Transportation

Abstract Risk analysis of dangerous chemicals transportation is the basis of safety transportation decision and key of accident warning and emergency rescue as well. This article focuses on dangerous chemicals transportation risk from two dimensionalities, which are accident rate evaluation and results simulation analysis. We use information diffuse theory to evaluate dangerous chemicals transportation accident rate, and analyze the result of dangerous chemicals transportation accident with GIS simulation technology. The former method complements the fault of lacking enough observation data; the latter one with detailed geography information overcomes the defect that the analysis has low accuracy. This approach further develops the method of dangerous chemicals transportation risk analysis, and then helps to make effective decision to reduce accident and protects people's lives and fortune.

Enhancement of Management for Land Transportation of Dangerous Chemicals

Enhancement of Management for Land Transportation of Dangerous Chemicals