Xinran Screw compressor steam compression recovery
Engineering technical scheme
SHANGHAI XINRAN COMPRESSOR CO.,LTD
1 project design conditions
1.1 projects of heat condition
The steam source conditions: saturated steam 0.1 MPa. A, 100 ℃, for compressed to 0.45 MPa. A, 145 ℃, steam 4 t/h;
Project name: screw compressor steam compression recovery project.
1.2 project construction site:
Installation location: design of unit installed near a owner waste heat sources of heat/steam plant.
1.3 the power requirements (can be adjusted according to the actual circumstance of the owner)
Screw compressor steam for electricity provided by the user is responsible for:
(1) control power supply: ac power AC380V, 3 phase, 50 hz;
(2) the power supply: compressor body and auxiliary power adopts ac power AC10000V, 3 phase, 50 hz;
1.4 water requirement (can be adjusted according to the actual circumstance of the owner)
Screw water vapor compressor mainly include: the unit steam humidity adjusting water;Mechanical seal with circulating cooling water;Lubricating oil system in circulating cooling water three parts.
The unit steam humidity control water use oxygen or boiler feed water;
Mechanical seal with use demineralized water circulating cooling water;
Lubricating oil system using cold water circulation industry cooling water;According to the industrial circulating cooling water treatment design specification (GB 50050-2007), cooling water water quality must meet the following requirements, can also according to the local water quality, but shall not be lower than in the table below standard：
ITEM | Allowed values |
turbidity | ≤6 NTU |
hardness | ≤150 mg/L |
Total alkalinity | ≤200mg/L |
PH (25℃) | 6.8~9.5 |
The oil content | ≤1.6mg/L |
The temperature | ≤30 ℃ |
Cl2 | 0.06~0.33mg/L |
Fe | ≤0.33 mg/L |
Cu | ≤0.033 mg/L |
Cl- | ≤233 mg/L |
S2O4-＋Cl- | ≤833 mg/L |
SiO2 | ≤58 mg/L |
Mg2+×SiO2 | ≤16000 mg/L |
NH3-N | ≤3.3 mg/L |
COD5 | ≤3mg/L |
2 equipment selection scheme
2.1 the screw compressor design parameters of steam
According to the heat source parameters and user requirements, design steam into screw compressor compression parameters after the ascension, compressed steam back to users continue to use the steam equipment.
Item | SREW STEAM AIR COMPRESSOR | ||
SREW STEAM AIR COMPRESSOR | MODEL | XR-190-700 | |
QTY | 1 SET | ||
The steam humidity adjusting the parameters of the warm water reduction (optional) | Pressure：MPa.a | >0.5 | |
The temperature：℃ | 102 | ||
The amount of water：t/h | 0.5 | ||
Design inlet pressure：MPa.A | 0.1 | ||
Design inlet temperature：℃ | 100 | ||
Design into the steam dryness： | 0.9 | ||
The design of exhaust steam pressure：MPa.A | 0.45 | ||
The design of exhaust steam temperature：℃ | 145 | ||
Compressed steam：t/h | 4 | ||
Compressor rated speed：r/min | 3000 | ||
Compressor shaft power：kw | 655 | ||
Frequency modulation motor | POWER：kW | 700 | |
Voltage：V | 10KV | ||
frequency：Hz | 30~50 | ||
2.2 Screw compressor equipment of steam
Item | Name | MODEL | QYT | UNIT | FACTORY |
1 | Screw compressor unit of steam | XR190—700（The whole device prizing） | 1 | SET | SHANGHAI XINRAN |
1.1 | MOTOR | XR190 | 1 | PC | SHANGHAI XINRAN |
1.2 | PLCControl cabinet and the instrument | XR-TK | 1 | SET | SHANGHAI XINRAN |
1.3 | Lubricating oil system | With the host device prizing | 1 | SET | SHANGHAI XINRAN |
1.4 | Seal cooling water system | With the host device prizing | 1 | PC | SHANGHAI XINRAN |
1.5 | VSD MOTOR | 700kW-10KV | 1 | SET | HENGSHUI MOTOR |
1.6 | The inverter | 700kW-INVERTOR MOTOR | 1 | PC | XIWANG LANSEN |
1.7 | Steam humidity control system | With the host device prizing | 1 | SET | SHANGHAI XIRAN |
1.8 | Steam accumulator tank (inlet) | 1 | PC | SHENYANG RELI | |
1.9 | Steam buffer tank | 1 | PC | SHENYANG RELI | |
1.10 | Interface accessories | Interface companion flange, fasteners, anchor bolt, and sealing gasket | 1 | PC | SHANGHAI XINRAN |
2.3 Equipment process
Note: the figure only said related system schematic diagram, see configuration table scope of supply.
Unit for main equipment overall dimensions and weight: (dimension estimates, specific length will be subject to the final design)
ITEM | NAME | MODEL | SIZE（M） | QTY | WEIGHT（T） |
1 | Screw compressor unit of steam | XR-190-700 | 5.5×2×2.5 | 1SET | 10 |
2 | PLC Control cabinet and the instrument | XR-TK | 0.8×0.6×2.2 | 1SET | 0.4 |
3 | Inverter | 1SET | |||
4 | Steam accumulator tank (inlet) | 1SET | |||
5 | Steam buffer tank | 1SET |
Generating set around the room not less than 1.5 m, speed regulation and grid-connection control cabinet installed near the equipment for field observation operation control.
2.4 Lubricating oil system
Screw the lubricating oil system of steam compressor adopts circulation lubrication method, form a complete set of integrated lubricating oil system.
Three screw pump oil pump selection, operation, low noise, stable flow, can undertake high speed over a long period of time. Essential oil filter adopts double barrel oil filter, but in the case of non-stop switch to clean oil absorption, oil filter, guarantee the oil circulation is not affected.
Lubricating oil is chosen N46 turbine oil, work in high temperature has good emulsification oxidation resistance, lubricating oil pressure control in 0.1 ~ 0.3 MPa.Because oil circulation for a long time after use to cause a decline in the quality, in order to ensure the lubrication system of good lubrication effect, lubricating oil should be replaced periodically, design of lubricating oil use period for 1 year.
2.5 the cooling water system
2.5.1 steam humidity control system
Unit water steam humidity control, to ensure that the unit compressed gas parameters of steam temperature to satisfy the user requirements, to prevent exhaust overheating, ensure the security and stability of equipment operation.To avoid impact on compressed steam quality, humidity control water use oxygen/boiler feed water, provided by the user is responsible for.(parameters demanded to see the public media 2.6)
2.5.2 mechanical seal cooling system
Owner directly provide demineralized water, used in mechanical seal cooling unit.(parameters demanded to see the public media 2.6)
2.5.3 oil cooling
Using external loop to provide cooling to form a complete set of lubricating oil system, industrial cooling water provided by the user is responsible for.(parameters demanded to see the public media 2.6)
2.6 equipment public medium parameters and consumption
Unit to ensure safe and stable operation, but also must provide aided engineering medium for unit operations, the parameters are as follow：
ITEM | PROJECT | PARAMENT | |
1 | Industrial circulating cooling water | Tempreture：℃ | ≤ 30 |
pressure：MPa.G | 0.2~0.5 | ||
Oil system of circulating water：t/h | 6 | ||
2 | Demineralized water Mechanical seal (cooling) | Tempreture：℃ | ≤ 35 |
pressure：MPa.G | 0.2~0.5 | ||
Machine seal cooling water circulation：t/h | 6 | ||
3 | eduction of warm water (with the exception of oxygen water/desalted water) | Tempreture：℃ | 102 |
pressure：MPa.G | > 0.5 | ||
water：t/h | 0.5 | ||
4 | Control power | Frequency：Hz | 50±1 |
voltage：V | AC380V±10% | ||
POWER：kW | 10 | ||
5 | MOTOR POWER | frequency：Hz | 50±1 |
voltage：V | AC10kV±10% | ||
power：kW | 800 | ||
6 | Lubricating oil | model： | 46#compresor oil |
installation of lubricating oil：L | 500 | ||
Oil circulation quantity：L/min | 80 | ||
3implementation plan
3.1 items and contents to be provided by users
1) The user provides the construction site of screw steam compressor unit;
2) The deoxygenated water, circulating cooling water and demineralized water required by the unit are connected by the user to one meter outside the corresponding access pipe of the unit, or to the corresponding inlet interface flange of the unit;
3) The heat source steam pipe is provided by the user and connected to the inlet flange of the screw steam compressor unit;
4) The user is responsible for the cable laying from the user's on-site power distribution cabinet to the screw steam compressor unit;
5) All energy media required on site are provided by users (including steam, circulating industrial cooling water, demineralized water, deaerated water, instrument air or compressed air, control and power supply, etc.).
3.2 contents provided by the supplier
1) According to the steam source conditions, we provide: screw steam compressor unit, speed control system, frequency conversion regulation system, import and export steam liquid separation tank and other equipment supply;
2) Installation and commissioning of screw steam compressor and control system;
3) Provide equipment list.
4) Relevant supply and installation data of equipment.
4 project benefits
Supporting equipment for the project: 1 set of screw steam compressor unit;
The main economic and technical indicators of the project are as follows:
ITEM | UNIT | Indicators | |
Unit parameters | Steam pressure after compression ： | MPa.A | 0.45 |
Steam temperature after compression ： | ℃ | 145 | |
Compressed steam volume ： | t/h | 4 | |
Annual operation time of unit ： | h | 8000 | |
Electricity consumption | Unit operating power ： | kW | 650 |
Annual power consumption ： | 10000kW.h | 520 | |
Annual power consumption cost (0.10 USD / kWh) | 10000USD/year | 52 | |
Water consumption | Industrial water volume (circulating water, temporarily excluded from consumption) | TON/YEAR | 0 |
Softening water volume (circulating water, not included in consumption temporarily) | TON/YEAR | 0 | |
Desuperheating water volume | TON/YEAR | 4000 | |
Consumption cost of desuperheating water (water price 2USD/ ton ） | USD/YEAR | 4000 | |
Steam recovery | Annual steam recovery of unit | TON/Year | 32000 |
Unit steam recovery income (150USD/ ton) | USD/YEAR | 640 | |
Total economic benefits | USD/YEAR | 600000 | |
5. Conclusion
1. The screw steam compressor is used to recover low-pressure steam, reduce the emission of low-quality steam in enterprises, and realize the secondary recycling of energy.
2. Because the whole thermodynamic system of screw steam compressor is simple, the equipment can be directly transformed on the basis of the original pipe network system, so the whole field work quantity is small and the equipment covers a small area.
3. Screw steam compressor has simple structure, no complex parts, long service life, low maintenance cost, obvious economic benefits and short return on investment.
