Technology strength
Moon Group is a key national high-tech enterprise and has a national enterprise technical center composed of over 300
industrial experts, a post-doctoral research station and a combined national and local engineering laboratory.
Moon Group has firstly passed ISO9001 quality management system certification and ISO14001 environmental management system certification. The products of -Moon Group have passed multiple authoritative certification including ASME pressure vessel product U certification, CCC certification and EU CE certification successively.
In the “eleventh five-year plan” period, -Moon Group has undertaken and completed 11 national technological innovation plans and 18 provincial technological innovation plans and taken charge of revising 4 national standards and 8 industrial standards.
Product Introduction
The gas compressor products provided by -Moon Group include natural gas compressors, CBM compressors, crude stabilization gas compressors, biogas compressors, vinyl chloride compressors, carbon dioxide compressors, ammonia compressors, nitrogen compressor,propane compressors, mixed refrigerant (MR) compressors, BOG compressors, flash steam compressors, COG compressors, water gas compressors, cracked gas compressors, etc. The series compressors are characterized by safety, high efficiency and environmental protection, applies to various energy and petrochemical industries involving petroleum gas recovery, natural gas gathering,transportation and liquefaction, CBM (gas) gathering, transportation and liquefaction, biological gas (all biogas and landfill gas) pressurization liquefaction, coal chemical (coal-to-gas, water gas) pressurization liquefaction, chemical industry, etc. and can meet the requirements of pressurization, liquefaction, transportation, etc. of various special process gases.
Equipment strength
1.German KLINGEBLNBERG screw rotor grinding machine
2.British HOLROYD screw rotor grinding machine
3.MAKINO A88 machining center (positioning accuracy 0.0025mm)
4.MAKINO flexible machining center
5.MAKINO A77 machining center (14 workbenches, 188 tool aprons)
6.American three-coordinate measuring system
7.Rotor dynamic balancing detector
8.Screw head assembly shop
9.Experimental center
10.Food technology laboratory
Characteristic-Open type screw compressors
1.With its international leading rotor profile, the open type screw compressor was awarded a national patent(No.: ZL02 2 14708.X; ZL02 2 67272.9; 200710013500.9).
The open type screw compressor is characterized by high efficiency and energy saving. The efficiency of the open type screw compressor is over 7% higher than a water injection screw compressor or a diesel oil injection screw compressor, over 12% higher than a dry screw compressor and over 6% higher than the oil injection screw compressor leading in the industry.
2.The open type screw compressor was warded with grade II national science and technology advance prize. The open type screw compressor has low noise level and higher environmental protection quality. The noise level of the open type screw compressor is over 15dB(A) lower than
a dry screw compressor, over 10 dB(A) lower than a water injection screw compressor or a diesel oil injection screw compressor ad over 8 dB(A) lower than a common oil injection screw compressor.
3.The abrasive machining precision of the rotor is twice higher than the milling precision.
4.The micro-oil screw can effectively prevent the rotor and shell from being corroded and has long service life.
5.The motor is directly connected, doesn’t include a speed increasing gear and has fewer moving parts and lower failure rate.
6.The axial force balancing technology is adopted and the thrust bearing has long service life.
7.The rotor uses a sliding bearing for radial support, thus eliminating mechanical abrasion and realizing higher reliability; in addition, the impact of compressor clearance can be controlled, and the service life of the sliding bearing that bears radial force is far too longer than that of a rolling
bearing.
8.A slide valve instead of an imported throttle valve is used in flow regulation, and power consumption is decreased with flow reduction, thereby realizing 15~100% stepless regulation and achieving the purpose of real energy saving and consumption reduction. The power consumption of flow regulation with a slide valve is over 35% lower than that with a bypass valve under semi-load operating conditions. The current load level of the compressor can be accurately
indicated via an energy indicator, thus realizing control automatization.
9.The scope of applicable working conditions is wide. There is still high efficiency of single-stage compression under the working conditions with high compression ratio.
10.During two-stage compression, the applicable compression ratio is higher (over 40), the efficiency is high, and the system is simple and runs more stably and reliably.
11.The oil circulation system combines forced oil feeding with differential oil feeding and has high performance in lubrication, sealing, cooling and noise reduction.
12.The compressor has higher reliability and fewer wearing parts than a piston machine, is not sensitive to liquid and dust and has long operation life and low maintenance cost. The compression components are never worn and the efficiency is long and stable. The compressor has no unbalanced inertia force, runs smoothly and stably and has small capital investment. In addition, the compressor is characterized by continuous gas transmission, stable pressure without pulse, no need for a buffer tank, simple piping design and no need for design and construction of anti-resonance measures
Characteristic -Semi-hermetic type screw compressor
1.According to the technical requirements of natural gas liquefaction and other technological processes, -Moon has developed a brand new semi-hermetic screw compressor with high pressure and forced oil feeding mode. In addition to having the advantages of the open type screw compressor, the semi-hermetic screw compressor has the following advantages.
2.The compressor uses a patent technology (patent No.: 201110282509.6).
addition, the compressor is directly connected with a motor on an enclosed basis, thus reducing a set of mechanical seal; especially in the LNG liquefaction process, this can effectively avoid leakage of mixed refrigerants and will not change the proportioning ratio of mixed working media, thereby ensuring long-term running of the refrigerating system with high efficiency.
Matching compressor system
1.The lubricating oil self-cleaning system precludes oil sludge from entering the compressor, can be replaced on line and doesn’t affect production.
2.The oil pump is driven singly to realize lubrication firstly upon startup and thus to eliminate insufficient lubrication in the early startup stage of the compressor.
3.By combining forced lubrication with differential lubrication, the compressor is more suitable for working conditions with pressure fluctuation (variation of gas intake pressure and exhaust pressure).
4.Fully synthetic polyether lubricating oil is adopted. The lubricating oil is not mutually soluble in media and is separated more easily.
5.The high efficiency oil-gas separator with patent technology (patent No.: 200520081647.8; 200510042183.4) is used to ensure the oil content at the exhaust port of the unit is no larger than 3ppm. In addition, using a high efficiency oil eliminator, the oil content at the exhaust port is lower than 1ppm.
6.There are two high efficiency oil eliminators with one in use and the other for standby use, and they can be replaced on line, thus having no impact on production.
7.There are two lubricating oil filters with one in use and the other for standby use, and they can be cleaned on line, thus having no impact on production.
8.An oil way temperature control valve is installed for purposes of ensuring that the oil separator temperature is over 15 higher than the dew point and that the lubricating oil will not be emulsified and precluding moisture or heavy hydrocarbons from being separated out.
9. A slide valve is used in flow regulation or the combined mode with slide valve+variable frequency is used in air volume regulation as required by users.
10.The unit uses a slide valve instead of an imported throttle valve in air volume regulation of the compressor, and the power consumption of the unit is decreased with flow reduction, thereby achieving the purpose of real energy saving and consumption reduction. The power consumption of flow regulation with a slide valve is over 35% lower than that with a bypass valve under semi-load operating conditions.
11.Multiple units are skid-mounted on the same public foundation for convenience of installation and movement.
12.The safety valve, venting pipe and blow-off pipe are connected to the same point for unified discharge, so pipeline connection is simple and convenient during use.
Instrument control system
The microcomputer control core component is Schneider PLC, which is characterized by simple and convenient operation and maintenance, high protection level, strong immunity from interference, powerful control function, high and stable communication speed, etc.
1.The PLC of the unit displays the following parameters
Exhaust pressure
Inlet pressure
Lubricating oil temperature
Oil feed pressure
Unit outlet temperature
Cumulative running time
Oil temperature protection setting value
Oil pump on-off status
Main motor on-off status
Frequency converter frequency
Slide valve full-load status
Slide valve zero-load status
Corrected deviation value of sensor
Unit load level
Main motor starting time
Remote communication interface reserved
Running mode
2. In addition, a MODBUS RS485 communication interface is reserved to realize communication with DCS, the unit can be remotely monitored and controlled on a PC terminal, and the functions including group control of multiple units etc. can be realized.
3.The operating parameters of the unit can be displayed in real time, including gas intake pressure, exhaust pressure, exhaust temperature, oil pressure, current, flow rate, etc. during unit running.
4.Safety protection
Oil pump motor overload protection
Main motor overload protection
High exhaust pressure protection
Ultra-high exhaust temperature protection
Over-low oil pressure protection
Oil temperature protection
Low gas intake pressure protection
