Large and medium-sized air separation equipment products are the leading products of our company
The air separation equipment designed and manufactured by our company has been serialized, with the maximum specification of 82, m/h. In the 199s, the molecular sieve purification air separation plant with booster expander process was developed, and the application of new technologies such as structured packing distillation column, hydrogen-free argon production and large-scale internal compression process has reached the international level, taking the leading position in China.
the large and medium-sized air separation equipment designed and manufactured by our company include: 2/h, 3 m/h, 4 m/h, 5 m/h, 6 m/h, 8 m/h and high-purity nitrogen series equipment. Since 199s, our company has further expanded the international market, and exported 15 m/h, 32 m/h, 45 m/h, 6 m/h and 15 m/h air separation equipment and all-liquid equipment of various specifications to Indonesia, India, Philippines, Iran, EU, Vietnam, Turkey, Iraq and other countries.
since 2, according to the market changes, our company has intensified the development of large-scale internal compression air separation products, and successively provided metallurgical and chemical enterprises with complete sets of large-scale internal compression air separation equipment with oxygen pressure levels of 2.5—11.Mpa and capacities of 2,, 3,, 4,, 5,, 6, and 8,.
our company can also design and manufacture full-extraction air separation equipment according to the specific requirements of users, which can simultaneously produce gas and liquid products of oxygen, nitrogen, argon and rare gases, or separately produce gas and liquid products of oxygen or nitrogen. Aluminum plate-fin heat exchanger is widely used in industrial gas separation and liquefaction, petrochemical industry, power transportation machinery and refrigeration equipment because of its compact structure, light weight and high heat transfer efficiency. Our company has strong strength in the design and manufacture of plate-fin heat exchangers, has a perfect production system and accumulated rich experience. It has the largest vacuum brazing furnace and complete sets of manufacturing and inspection equipment in China, and is the production base of plate-fin heat exchangers in China. BCK 3-8/6 and BCK 2.1-9/6 aluminum plate-fin switching heat exchangers won the National Silver Award in 1985. At present, the maximum size of solderable product unit is 135×135×78mm, which can exchange heat of nine fluids at the same time.
The products of shell-and-tube heat exchangers include tubular, finned-tube, sleeve-type, coiled-tube, double-tube plate and inner-finned-tube, which can be designed and produced according to different needs of users. Among them, the multi-stream high-pressure coiled-tube heat exchanger (the maximum design pressure is more than 2Mpa, the maximum external dimension is φ 3× 22, and the tonnage is more than 9 tons) has been listed as a technical innovation project by the State Economic and Trade Commission. Our company is one of the backbone enterprises that design and manufacture centrifugal air compressors and oxygen compressors in China, with more than 3 years of design and manufacturing experience.
Over the years, we have cooperated with Xi 'an Jiaotong University, China Academy of Sciences, Tsinghua University, Zhengzhou University of Technology and other scientific research institutes on several projects. * * * Together, we have developed design software for compressor aerodynamic and thermal calculation, bearing and rotor dynamic calculation, impeller strength calculation, etc., and used these software to take the lead in carrying out experimental research on three-dimensional impeller model level in China. In the early 198s, we developed the first H-type isothermal compressor with near-inlet guide vane adjustment in China. The machine has advanced performance, the variability rate is over 86%, and the isothermal efficiency of the whole machine is over 74%. The vertical oil-free lubrication and piston-type oxygen and nitrogen compressor developed by our company has the characteristics of advanced pneumatic performance, compact structure, small floor space, stable operation and high reliability, and has a high market share. In 1995, the company imported a large-scale software package for designing and processing the three-dimensional impeller from NREC, including the performance prediction of centrifugal compressor, the three-dimensional fluent analysis and the three-dimensional impeller simulation of machining software, and purchased a five-axis linkage numerical control machining center specially used for processing the three-dimensional impeller from Boston Machine Tool Company, and successfully applied it to the design and processing of this kind of products in our company, which greatly improved the design and processing accuracy of the products and ensured the consistency between the design and the actual operation value.
At present, there are two types of centrifugal air compressors designed and manufactured by our company: single-shaft DA type and double-shaft H type, with dozens of specifications, the flow rate ranges from 8m/min to 2,3m/min, and the discharge pressure ranges from .6Mpa-2.Mpa；: Oil-free piston-type oxygen and nitrogen compressors are available in single row, double row, three rows and four rows. The displacement of a single compressor ranges from 3 m/h to 7,5 m/h, the exhaust pressure ranges from .2 MPa to 3. MPa, and the exhaust pressure of the booster can reach 6.4MPa. A brand-new compressor can also be designed and manufactured according to the special requirements of users. Turbo-expander is one of the main supporting units of air separation equipment. Our company has been engaged in the research, development, design and manufacture of turbo-expander since 196s. Up to now, more than a thousand units have been operated in steel, petrochemical and other industrial sectors, and some of them have been exported abroad with air separation equipment.
in the late 198s and early 199s, our company cooperated with Xi 'an Jiaotong University in the research and development of supercharged turboexpander, introduced the physical property database from abroad, and developed the design and calculation software for thermodynamic characteristics and power at both ends of supercharged turboexpander suitable for multi-component media. The company specially established the expander cold test bench, and obtained a lot of empirical data through experiments, which enriched the design and calculation software and greatly improved the design accuracy. In 1995, the company introduced the design and processing software package of turbine expansion machinery from NREC, and the five-axis CNC machining center specially used for three-dimensional impeller machining from Boston Machine Tool Company. These softwares can be used to predict and optimize the performance of expander and supercharger, analyze the three-dimensional flow field, and design and model the three-dimensional impeller. In 23, the company upgraded and optimized the NREC software. The combination of software and hardware can realize the automatic machining of three-dimensional impeller, which greatly improves the design accuracy, ensures the high consistency between the design performance and the actual operating parameters, and greatly improves the efficiency of the unit, approaching or reaching the advanced level in the world today. Our company is engaged in the design, complete sets, configuration, debugging and on-site technical services of control system and instrument engineering of domestic and export air separation units.
the control system covers nearly 1, sets of extra-large, large, medium and small air separation equipment with 8--8Nm3/h/h, and the pressure swing adsorption and LNG cold energy utilization are realized. From qdz and electric unit instrument cluster to PLC, DCS, remote monitoring advanced control and ITCC.
our company has also undertaken the design, complete sets and debugging of instrument control systems for several sets of environmental protection projects (pharmaceutical factory, paper mill and sewage treatment).
our company has adopted the following kinds of control systems to meet the multi-layer requirements of users:
Honeywell(Micro TDC3, TDC3, TPS, ePKS, TPS) in the United States
Foxboro (I/A series) in the United States
ABB(Infi9, Freelance 2, IndustrialIT)
Yokogawa, Japan (μ XL, CS1, CS3)
Emerson, USA (Delta V)
Siemens, Germany (S7-2, S7-3, S7-4, PCS7)
GE, USA (Fanuc97, PCS7) <
schneider (quantum) of the United States
Yomotoke (Harmonas) of Japan
Zhongkong (JX-3xp) of Zhejiang University
Hollysys (Macs) of Beijing
Triconex (TS 3) of the United States
ORMRON(C4P, CPMEA) of Japan.
The automation control level of our company is at the advanced level in air separation industry, and the following controls have been achieved so far:
1. Local optimization control of air separation unit, such as automatic start-up, automatic loading and unloading of air compressor and booster, anti-surge control and automatic load change of delivery flow, etc., and advanced automatic load change control of the whole air separation unit has been realized.
2. The instrument and electricity integrated control of large, medium and small air separation units monitors all air separation complete sets of equipment (including each unit) through DCS system, which reduces a lot of external hard wiring, low-voltage control electrical components and engineering installation materials between instrument and electricity, improves the reliability of air separation equipment, and makes the control system more cost-effective.
3, the implementation of remote monitoring, through the Inter for remote real-time analysis and guidance of air separation operation, greatly convenient for users.
4. data communication between DCS and the computer of the factory management network.
5. ITCC control is adopted for large air separation supporting units (air compressor, booster, steam turbine, oxygen permeable unit and nitrogen permeable unit, etc.) to complete the integration of emergency shutdown interlock protection, comprehensive control and protection of units and safety protection system of air separation unit.
6. The remote diagnosis and fault diagnosis center for turbine machinery and remote monitoring center for air separation equipment have been established. Our company designs and produces all kinds of supporting valves for all kinds of industrial gas separation and liquefaction equipment. The main products are: butterfly valve, stop valve, throttle valve, check valve, regulating valve and switching valve, with 22 varieties and about 2 specifications. The nominal pressure is .6-22 MPa, the operating temperature is-196℃-2℃, and the transmission modes are manual, electric and pneumatic.
recently, our company has developed and studied various specifications of plane and spherical soft seal switching valves and plane hard seal switching butterfly valves used in molecular sieve pre-purification process air separation equipment, which are characterized by high temperature resistance, long service life, simple structure, flexible and stable opening, and have been successfully applied to air separation equipment of many users.