ZY-ZQY系列蒸汽离心压缩机是江苏中一科技节能股份有限公司专门针对MVR系统研制开发的水蒸气离心压缩机，专用于MVR系统中二次蒸汽的回收利用，以提高MVR系统的节能效果。ZY-ZQY steam centrifugal compressor is the special designed compressor on MVR system by Jiangsu Zhongyi Energy Efficiency Technology Co.,Ltd which is used in MVR system for recycle of second steam and improving energy-saving effect of MVR system.
2、结构及特点structure and characteristics
ZY-ZQY系列蒸汽离心压缩机结构和原理：Structure and principle of ZY-ZQY steam centrifugal compressor
ZY-ZQY系列蒸汽压缩机包括：压缩机本体＋高速齿轮箱＋油站和底座＋联轴器＋电机+仪器和仪表，还有其它为蒸汽压缩机有效、安全运行所需要的所有的辅助设备。ZY-ZQY steam compressor includes: compressor host machine, high speed gear box, hydraulic station and base, coupling, motor, instruments and other auxiliary devices for the effective and safety operation.
ZY-ZQY系列蒸汽离心压缩机：ZY-ZQY steam centrifugal compressor 压缩机本体：compressor ontology 高速齿轮箱：high speed gear box 油站和底座：station and the base
联轴器：coupling 电机：electrical machine 仪器：instrument 仪表：indicator 辅助设备：auxiliary equipment
ZY - ZQY series steam compressor drives the impeller to rotate at high speed through the motor, thus to form a negative pressure state at the entrance of the water vapor compressor to suck in low temperature and low pressure saturated steam. After been heated and pressurized by the compressor, the steam will become high temperature and high pressure saturated steam at the exit and will be used by the MVR system.
The characteristics of the ZY-ZQY steam centrifugal compressor
(1) The impeller type line is advanced、high efficiency and can be used in a variety of conditions.
Design according to the three dimensional flow theory and forecast performance according to CFD flow analysis technology, the steam compressor design parameters are fully guaranteed; the isentropic efficiency of steam compressor is not less than 80% at the same time, it is of high stability condition.
(2) Impeller finish manufacturing. Impeller is milled precisely by five-axis machining center, with precision size, after heat treatment, NDT test, speed test (115% work speed) and many times of dynamic balance (such as balance precision grade G2.5) detection, make sure the security and impeller meets the requirements;
(3) Impeller is anti-corrosion and easy to assemble and disassemble.
The impeller is made of stainless steel or titanium alloy accoring to the medium condition and it is of various corrosion resistance. The connection of impeller and the main shaft adopts the cross section and the pull rod which is with good centring repeatability, safe and reliable torque and easy to assemble and disassemble;
( 4 ) High dynamic balance precision and stable operation.
All rotating parts are of high dynamic balance precision and rotor group overall dynamic balance. Dynamic balance precision grade reaches G2.5 and the whole unit operates stably;
(5) Casing well made. Casing is casted and lathed by stainless steel 316L and passed through sand blasting;
(6) Good design of high-speed gear box.
High speed gear box adopts casting which can keep enough stiffness of the rotor under maximum load. Gear box adopts horizontal split structure to make sure enough machining precision to guarantee the cooperation with the bearing, the good centring precision of the rotor and the oil sealing property. The case structure can prevent harmful deformation caused by the temperature gradient inside the case during the transient process and the stable operation. The gearbox and compressor exist as a whole body but also separated from each other to make sure the lubricating oil will not pollute the medium, at the same time it can also prevent the steam from entering into the gear box to shorten the servive life of the gear and bearing;
( 7 ) Integrated oil station and the base, eliminate resonance effectively.
Oil station is the independent oil supply system of the steam compressor, supply all the required pure lubricating oil for the gear and bearing. Integrated station and the base with sufficient rigidity and strength can effectively control and eliminate resonance and is easy to install, inspect and clean.
( 8 ) High degree of automation and good reliability.
All parameters such as temperature, pressure, vibration adopt programming control, make timely and effective control of steam compressor, high degree of automation, good reliability;
( 9 ) Using the anti-surge device, effectively avoid surge of the steam compressor;
( 10 ) High efficiency and energy saving, easy to operate.
Working speed of the steam compressor adopts frequency control makes the steam compressor adapt very well to the adjustment of the MVR system, thus it will be of high efficiency and energy saving and easy to operate;
( 11 ) Good sealing property.
Steam compressor shaft adopts non-contact labyrinth seal and high pressure steam blocking seal in the casing place to ensure no impurities and air enter into the water vapor compressor.High-speed bearing box adopts non-contact labyrinth seal to prevent oil leakage and the entrance of air, water, impurities and so on from the outside. The medium is 100% without oil;
( 12 ) Packaged structure, cover a small area, save space, convenient installation;
( 13 ) The whole machine daily maintenance is easy and convenient.
3、型号说明 Model specification
压缩机型号： ZY-ZQY10-80/96-1.88A The compressor model: ZY-ZQY10-80/96-1.88A
压缩机型号说明： The instruction of the compressor model:
Ø ZY -------江苏中一节能科技股份有限公司 Jiangsu Zhongyi Energy Efficiency Technology Co.,Ltd
Ø ZQY-------蒸汽压缩机 steam compressor
Ø 10--------t/h，水蒸气蒸发量 t/h, water vapor evaporation
Ø 80/90-----℃，进出口饱和蒸汽温度 ℃, Import and export of saturated steam temperature
Ø 1.88------压比 pressure ratio
Ø A---------设计序号 design number
4、性能参数 performance parameter
蒸气蒸发量：5t/h～25t/h； Steam evaporation: 5t/h～25t/h;
进出口饱和蒸汽温差：5℃～20℃。saturated steam temperature difference of the import and export: 5℃～20℃.
最大压比：2.0 The biggest pressure ratio: 2.0
最大等熵效率：82% The biggest isentropic efficiency: 82%
5、选型 Model selection
客户提供的参数： The parameters given by the customer:
Ø 客户使用环境描述 Customers use environment description
Ø 蒸汽中腐蚀性介质的成分和含量（%） The composition and content of corrosive medium in the steam ( % )
Ø 蒸汽蒸发量(t/h) The steam evaporation( t/h )
Ø 进口饱和蒸汽温度(℃) Import saturated steam temperature (℃)
Ø 出口饱和蒸汽温度(℃) Export saturated steam temperature (℃)
Ø 进口饱和蒸汽压力(Pa) Imports saturated steam pressure (Pa)
Ø 出口饱和蒸汽压力(Pa) Export saturated vapor pressure (Pa)
Our company will design the most suitable steam compressor according to customers’ parameters, requirements and operating environment.
6、应用于MVR系统 Applied to MVR system
MVR（Mechanical Vapor Re-compression）——机械蒸汽再压缩，是指将蒸发(蒸馏等)过程的二次蒸汽(温度低、压力低)用压缩机进行压缩，提高其温度、压力，重新作为热源加热需要被蒸发的物料，从而达到循环利用蒸汽的目的，使蒸发过程不需要外加蒸汽；即用少量的电能获得较多的热能，从而减少系统对外界能源的需求的一项高效节能技术。
MVR (Mechanical Vapor Re-compression) - Mechanical Vapor re-compression, which means re-compress the second steam(low temperature, low pressure) of the evaporation (distillation, etc.) process by the compressor to increase its temperature and pressure and to be used as the heat source again to heat the material needs to be vaporized, thus to achieve the purpose of steam recycling and evaporation process does not need additional steam. It is a kind of high effcient energy saving technology which use a small amount of electricity to get more heat energy and reduce the system’s demand for outside world energy.
Roots compressor is a positive displacement blower, it conveys the air through the space between the impellers and the air volume is in direct proportion to the speed of the fan. Roots blower is with hard exhaust properties, when pressure changes, the flow rate change is very small. In theory, regardless of changes in the fan outlet pressure, as long as the fan is with enough intensity and motor is not overload, every turns, the conveying capacity of air is constant. Thus it is suitable for the variable pressure and permanent flow condition. As the roots blower has surging during the working process, it will cause higher noise which will bring impact to the surrounding environment.
离心鼓风机是根据动能转换为压力能的原理，利用高速旋转的叶轮将气体加速后然后减速、改变流向，使动能转换为压力能。离心鼓风机流量调节方便，噪音低，压力变化时，流Centrifugal blower is according to the principle of converting kinetic energy to pressure energy, using high-speed rotating impeller to accelerate the gas and then slow down, change flow direction to convert kinetic energy to pressure energy. Centrifugal blower flow regulation is convenient, low noise, pressure change, change of flow, pressure and flow can be adjusted in a certain range.Therefore, it is applicable to unstable pressure flow condition.
High-speed single-stage centrifugal blower is designed according to the three dimensional flow theory which is more in line with the fluid flow regularity, the impeller effciency is higher than that of multistage low-speed centrifugal blower which widely adopts the two dimensional flow theory;Second, high-speed single-stage centrifugal blower using the axial inlet, and inlet prewhirl device is installed in front of the impeller to reduce the loss of the inlet;Third, high-speed single-stage centrifugal blower as the primary structure, it is short flow and small loss.To sum up, the effciency of the single stage high speed centrifugal blower is 15% higher than the multistage low-speed centrifugal blower which can create higher economic benefit for clients.