CN103671274B - The method of oil consumption falls in the cooling of large-scale compressor purging system nitrogen envelope - Google Patents
The method of oil consumption falls in the cooling of large-scale compressor purging system nitrogen envelope Download PDFInfo
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- CN103671274B CN103671274B CN201310712482.9A CN201310712482A CN103671274B CN 103671274 B CN103671274 B CN 103671274B CN 201310712482 A CN201310712482 A CN 201310712482A CN 103671274 B CN103671274 B CN 103671274B
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Abstract
The invention discloses the method that oil consumption falls in the cooling of a kind of large-scale compressor purging system nitrogen envelope, the method is by transforming large-scale compressor purging system, introducing nitrogen carries out shutoff and is cooled to oil smoke, nitrogen throttling is utilized to lower the temperature, the oil smoke relatively high with temperature carries out convection heat exchange, cools the oil smoke produced in compressor rotary course, makes most of oil molecule in oil smoke be cooled to fluid oil, a small amount of oil smoke is discharged with nitrogen, reduces oil smoke to greatest extent and enters air.Concrete scheme is by low pressure nitrogen tracheae access fuel tank or bottom smoke-ejecting pipe, increases nitrogen tube sealing.This method applies to large-scale compressor purging system Be very effective, not only reduces compressor oil consumption, also reduces oil smoke discharge amount simultaneously, improves environment-friendly quality.This method equipment is simple, easy and simple to handle, cheap, has broad applicability, is applicable to the large-scale compressor of the industry such as metallurgy, chemical industry.
Description
Technical field
The invention belongs to large-scale compressor purging system improvement opportunity, relate in particular to the purging system improvement of various types of compact machine lubricating oil system.
Background technique
Large-scale compressor is the main equipment in the fields such as metallurgy, chemical industry, is to provide the visual plant of energy medium.And large-scale compressor adopts turbocompressor all mostly at steel industry, chemical enterprise, turbocompressor has high rotating speed, the features such as large discharge, and vital effect is played in the operation of its lubrication system to equipment.High temperature is produced between compressor high-speed rotation axis and bearing shell, grinding is produced to lubricant oil simultaneously, oil molecule grinding and high temperature effect under distillation generation oil smoke, under the effect of range hood, be back to fuel tank together with high temperature oil return, then enter air by purging system.And in lubrication system, normal operation and the economic smoke evacuation of purging system are the difficult problems that current each compressor manufacturer assaults fortified position.
The application part relating to compressor cooling in current Chinese patent data only has No. 200720056623.6 " compressor cooling and liquid nitrogen combination cooling low-temperature test box structures ", there is no the application part of the cooling large-sized compressor purging system of nitrogen throttling at present.
Summary of the invention
The present invention is intended to the deficiency existed for prior art, provides a kind of large-scale compressor purging system nitrogen to seal the method cooling and fall oil consumption, reduces compressor oil consumption and oil smoke discharge amount, improve environment-friendly quality.
The method of oil consumption falls in the large-scale compressor purging system nitrogen envelope cooling that inventor provides, by transforming purging system, introduce nitrogen and carry out shutoff, nitrogen throttling is utilized to lower the temperature, high oil smoke relative to temperature carries out convection heat exchange, cooling oil smoke, makes most of oil molecule in oil smoke be cooled to fluid oil, reduces oil smoke to greatest extent and enters air.
Therefore, the technological scheme that inventor provides is:
(1) the oil arranged bottom the smoke exhaust fan of compressor is introduced fuel tank, increase a return tube by bottom smoke-ejecting pipe simultaneously, be connected with smoke exhaust fan bottom oil return pipe, connect low-pressure nitrogen; Deaerator is set up in the outlet of smoke exhaust fan, and the oil smoke that smoke exhaust fan is extracted out cools through nitrogen, and the oil droplet of formation is separated in deaerator, bottom deaerator, get back to fuel tank;
Or (2) increase nitrogen seal device in smoke-ejecting pipe, namely increase nitrogen tube sealing in the bottom of smoke-ejecting pipe, connect low-pressure nitrogen; Described nitrogen tube sealing is ring pipe, and nitrogen tube sealing has aperture, and carry out heat exchange with oil smoke after nitrogen throttling cooling, the oil droplet of formation gets back to fuel tank along return tube.
Above-mentioned deaerator is nitrogen throttling condensing type separator.
Above-mentioned low-pressure nitrogen is from the nitrogen pot of air separation system, and its dew point, lower than-100 DEG C, does not have water or other contaminating impurity oil.
Hole diameter in above-mentioned nitrogen tube sealing is 2mm, and number of aperture is determined according to smoke-ejecting pipe diameter: φ 100 smoke-ejecting pipe opens 6; φ 150 smoke-ejecting pipe opens 10; φ 200 smoke-ejecting pipe opens 16.
Inventor points out: nitrogen throttling produces temperature drop, the numerical value that in main learning gas, " enthalpy " falls, according to " cryogenic fluid physical property table and figure " gained of tabling look-up: temperature 300K, the nitrogen enthalpy of pressure 0.55MPa is 1440kJ/kg, and nitrogen is by throttle orifice Pressure Drop to 0.055MPa, and enthalpy is 1230kJ/kg, produce 210kJ/kg enthalpy drop, temperature drops to 282.25K, and namely lower the temperature 17.75K, or 17.75 DEG C.Be 23 DEG C of calculating with nitrogen temperature, check in: throttling falls in pressure nitrogen, the temperature producing 17.75 DEG C is fallen.The nitrogen of 23 DEG C declines 5.5 DEG C by throttle temperature, fully can carry out heat exchange, cold oil molecule with oil smoke.
The method of the nitrogen coolant seal purging system of the present invention's innovation, for large-scale compressor purging system, can reduce compressor oil consumption, reduces oil smoke discharge, improves environment-friendly quality.This method equipment is simple, easy and simple to handle, cheap, has broad applicability, is applicable to metallurgy, the chemical enterprise with large-scale compressor.
Accompanying drawing explanation
Fig. 1 is temperature (T-H) figure, Fig. 2 of nitrogen is that Fig. 3 is the schematic diagram increasing nitrogen seal device in smoke-ejecting pipe by the nitrogen envelope cooling process figure of low pressure nitrogen tracheae access fuel tank.
In figure: 1 is fuel tank, 2 is smoke exhaust fan, and 3 is smoke-ejecting pipe, and 4 is nitrogen tube, and 5 is smoke exhaust port, and 6 is deaerator, and 7 is return tube, and 8 is nitrogen tube sealing, and 9 is Brick wall.
Embodiment
Nitrogen coolant seal is carried out to the DH-63 type compressor purging system that Shenyang Blower Factory is produced.
Embodiment 1: the oil arranged bottom the smoke exhaust fan 2 of compressor is introduced fuel tank 1, and increase a return tube 7 by bottom smoke-ejecting pipe 3, return tube 7 is connected with bottom smoke exhaust fan 2 simultaneously, connects low pressure nitrogen tracheae 4; Deaerator 6 is set up in the outlet of smoke exhaust fan 2, and the oil smoke that smoke exhaust fan 2 is extracted out cools through nitrogen, and the oil droplet of formation is separated in deaerator 6, bottom deaerator 6, get back to fuel tank 1.
Embodiment 2: in smoke-ejecting pipe 3, increase nitrogen seal device, namely bottom the smoke-ejecting pipe 3 of φ 150mm, increase nitrogen tube sealing 8, connect low pressure nitrogen tracheae 4; Nitrogen tube sealing 8 is ring pipe, and nitrogen tube sealing 8 diameter is φ 15mm, and it has aperture, and hole diameter is 2mm, and nitrogen tube sealing 8 has 10 apertures; A return tube 7 is increased bottom smoke-ejecting pipe 3; Carry out heat exchange with oil smoke after nitrogen throttling cooling, the oil droplet of formation gets back to fuel tank along return tube 7.
By this transformation, make full use of nitrogen cooling oil smoke, day reduce oil consumption be about 5kg, year Energy Saving be 1825kg.
Claims (4)
1. the method for oil consumption falls in large-scale compressor purging system nitrogen envelope cooling, it is characterized in that by transforming purging system, introduce nitrogen and carry out shutoff, nitrogen throttling is utilized to lower the temperature, high oil smoke relative to temperature carries out convection heat exchange, cooling oil smoke, makes most of oil molecule in oil smoke be cooled to fluid oil, reduces oil smoke to greatest extent and enters air; Concrete technological scheme is:
(1) the oil arranged bottom the smoke exhaust fan of compressor is introduced fuel tank, increase a return tube by bottom smoke-ejecting pipe simultaneously, be connected with smoke exhaust fan bottom oil return pipe, connect low-pressure nitrogen; Deaerator is set up in the outlet of smoke exhaust fan, and the oil smoke that smoke exhaust fan is extracted out cools through nitrogen, and the oil droplet of formation is separated in deaerator, bottom deaerator, get back to fuel tank;
Or (2) increase nitrogen seal device in smoke-ejecting pipe, namely increase nitrogen tube sealing in the bottom of smoke-ejecting pipe, connect low-pressure nitrogen; Described nitrogen tube sealing is ring pipe, and nitrogen tube sealing has aperture, and carry out heat exchange with oil smoke after nitrogen throttling cooling, the oil droplet of formation gets back to fuel tank along return tube.
2. in accordance with the method for claim 1, it is characterized in that described deaerator is nitrogen throttle type oil fume separator.
3. in accordance with the method for claim 1, it is characterized in that the nitrogen pot of described low-pressure nitrogen from air separation system, its dew point, lower than-100 DEG C, does not contain water or other contaminating impurity oil.
4. in accordance with the method for claim 1, it is characterized in that the hole diameter in described nitrogen tube sealing is 2mm, number of aperture is determined according to smoke-ejecting pipe diameter: φ 100mm smoke-ejecting pipe opens 6; φ 150mm smoke-ejecting pipe opens 10; φ 200mm smoke-ejecting pipe opens 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310712482.9A CN103671274B (en) | 2013-12-20 | 2013-12-20 | The method of oil consumption falls in the cooling of large-scale compressor purging system nitrogen envelope |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310712482.9A CN103671274B (en) | 2013-12-20 | 2013-12-20 | The method of oil consumption falls in the cooling of large-scale compressor purging system nitrogen envelope |
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| Publication Number | Publication Date |
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| CN103671274A CN103671274A (en) | 2014-03-26 |
| CN103671274B true CN103671274B (en) | 2015-11-11 |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08144982A (en) * | 1994-11-28 | 1996-06-04 | Hitachi Ltd | Oil separator for compressor |
| DE102004028224A1 (en) * | 2004-06-09 | 2006-01-05 | Man B & W Diesel Ag | Method for operating a turbocharger and turbocharger |
| CN201083750Y (en) * | 2007-09-05 | 2008-07-09 | 高铁检测仪器（东莞）有限公司 | Compressor cooling and liquid nitrogen mixed cooling low-temperature test box structure |
| KR101245644B1 (en) * | 2011-05-04 | 2013-03-20 | 대우조선해양 주식회사 | Pump connecting structure of a natural gas supply system for a marine structure |
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