Ventilation system optimization design process and principle

Ventilation system design is actually the process of selecting critical fan and fan locations in a known ventilation network. By setting and optimizing the fan, the ventilation network realizes the orderly flow of the downhole air under the action of the fan power source to meet the wind requirements of the mine working face. System design must follow the basic principles of reasonable technology, economical, practical, safe and reliable.

The mine ventilation system is based on the development system and the stope structure. Therefore, when formulating the ventilation system, it is necessary to prepare the system map, mining method map, mining schedule, mining middle plan, service chamber (such as crushing system). Layout drawings, etc. The main contents of the ventilation system are: determining the ventilated roadway of the system, the ventilation network structure of the stope, and the working surface and location where ventilation is required. The drafting scheme is mainly based on the ventilation mode and the location of the fan. According to the characteristics of the mine, the fan can be selected for centralized ventilation (such as centralized ventilation) and the fan with more dispersed ventilation (such as multi-stage station). Select key installation lanes in the main roadway of the wind turbine. The installed roadway must have such characteristics: the screw unit roadway can control the total inlet or total return air of the system or section, and the independent ventilation system or the inlet and return air passages of the working face can be considered as the installed roadway. Centralized ventilation is actually a kind of ventilation method with less installed points and relatively concentrated fans. It is mainly suitable for the mines with relatively concentrated working faces, and a single mine with main inlet and return air shafts. Single main fan ventilation can not control the multi-middle working face of the underground to control the wind, and the reliability is poor. Multi-stage machine ventilation is a kind of ventilation method for multi-fan combined operation, suitable for the middle of the operation and the scattered working surface. The mine has high reliability and good ventilation effect.

Due to the backward calculation method and calculation tool, the traditional ventilation system design cannot solve the ventilation network iteratively, so it is impossible to know in advance the ventilation effect of the system design scheme. The ventilation expert introduces advanced mathematical models and calculation methods. The proposed ventilation system and ventilation scheme can be comprehensively calculated and optimized, and the optimization results of the network can be used to accurately evaluate the advantages and disadvantages of the design scheme. To carry out comprehensive network optimization design and calculation, it is necessary to prepare raw data related to the ventilation system, such as converting the ventilation network into a mathematical model (database) expressed by node number, node coordinates, node-related data, and if necessary, roadway must be prepared. Basic parameters (section, perimeter, support code) and basic data for the ventilation system.

Ventilation network generation is the initial processing of raw data, mainly to complete data conversion, independent loop delineation, air volume initial draft, network initial calculation and so on.

Fan optimization and selection of fan selection is the process of selecting the appropriate fan for all installed roadways in the proposed ventilation system. Due to the different network wind resistance and network characteristics of each installed point, the required fan models are different, the same installation point. There are also multiple optional fans or multiple installation angles in the roadway. Therefore, there must be an optimized selection process. The equipment operating cost and infrastructure cost within the service life of the ventilation system are the main function of the ventilation expert to optimize the selection of the fan. mathematical model.

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Changchun FAW Sihuan Automobile Pipeline Co., Ltd

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Rooted in the northeast, it radiates across the country.Sihuan Pipeline Company, integrating R&D, design, production, experiment and testing, has been specialized in producing nylon gas transmission pipeline, fuel pipeline and high-pressure pipeline products for 20 years.At present, the enterprise has nearly 40000 square meters of modern production workshops and business office buildings, more than 200 senior employees, and an annual output of 56 million automobile


pipeline products.Its subsidiaries are located in Chengdu, Qingdao, Ma'anshan, Jinan, Foshan and other cities. Yuncheng Branch is under preparation to meet the needs of customers in different regions.



Innovative fusion, leading technology

<R&D>

Sihuan Pipeline Co., Ltd. takes technological innovation as its eternal pursuit, and has accumulated profound technical information through 20 years of scientific research, providing the most advanced technical support for each product project.The company has been recognized by the municipal technology center and participated in the revision of several national standards and industrial standards.The scientific research team has reached cooperation with Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun University of Technology and other scientific research institutes, jointly developed a number of provincial science and technology department projects, and achieved a number of technical achievements.The testing laboratory has passed the ISO17025 laboratory management system certification. It has more than 40 sets of tube performance testing equipment and raw material testing instruments, and the testing means are


internationally leading.



Lean production, better quality than gold

<Production>

Sihuan Pipeline Company, based on the industry trend, formulates equipment procurement plans every year and continues to introduce world-class production equipment. Now, it has several automatic extrusion production lines in Merafil, Switzerland, as well as international top equipment such as Clarke bellows molding machine in France, Opel shrink pipe machine in Italy, which are stable, efficient, highly accurate, meet the diversified needs of the main engine factory, and achieve the brand charm of Sihuan.

Scientific management, safeguard quality.The production department implements a quality control system higher than the national standard, adopts 6S management on the site, regularly carries out personnel training, and constantly improves the process procedures.The quality inspection department must inspect every product and every process, resolutely put an end to the delivery of substandard products, and strive to promote product quality to the highest standards in the industry.



Four ring quality, famous throughout the country


<Products>

The products produced by Sihuan Pipeline Company are related to brake systems (including vacuum brake pipes, air brake pipes, spiral pipes, rear axle brake pipes);Fuel system (cover to atmospheric ash filter pipe, fuel pipe, crankcase vent pipe, vacuum pipe);New energy thermal management system and industrial energy storage water inlet and return pipeline assembly integrate safety functions such as check valve, flow regulating valve and exhaust valve, which directly affect vehicle performance and are prerequisites for safe driving;SCR system (including electric heating urea pipe, cooling water pipe and gas pipeline);High pressure pipeline products are used in clutch power assist system and hydraulic lifting pipeline. Excellent performance, stable physical performance, excellent chemical resistance, good processing performance and long service life.All products have passed the CQC certification, and all parameters tested in the laboratory are far higher than the national standards and industry standards.

After 20 years of hard work, Sihuan Pipeline Company has won recognition from all walks of life. It has successively won honorary titles such as "Jilin Province Small Giant Enterprise in Science and Technology", "High tech Enterprise Certificate", Changchun "Specialized, Special and New" SMEs. Its products are


now available to FAW Jiefang, FAW Pentium, Heavy Duty Truck Group, CIMC, Rolls Royce, Yapu, Sany Heavy Industry, GeelyContinental Group and other well-known enterprises are A-level suppliers of FAW Jiefang and other OEMs, and excellent suppliers of Anhui Valin.


In the future, Sihuan Pipeline Co., Ltd. will cater to the national carbon peak strategy, research and develop low emission pipeline manufacturing technology in a forward-looking manner, provide customers with high-quality products and services with innovation and quality, and create a better future for the automotive industry!


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