CN106310715B - A kind of space flight kerosene dissolving water filtering method - Google Patents
A kind of space flight kerosene dissolving water filtering method Download PDFInfo
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- CN106310715B CN106310715B CN201610817666.5A CN201610817666A CN106310715B CN 106310715 B CN106310715 B CN 106310715B CN 201610817666 A CN201610817666 A CN 201610817666A CN 106310715 B CN106310715 B CN 106310715B
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- nitrogen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0202—Separation of non-miscible liquids by ab- or adsorption
Abstract
The invention belongs to Aeronautics and Astronautics technical field of engines, and in particular to a kind of space flight kerosene dissolving water filtering method.This approach includes the following steps：1) nitrogen when filling blasts；2) nitrogen after the completion of filling blasts；3) heat exchanger liquid nitrogen cooling cycle drum nitrogen.This method can make the free water in kerosene with nitrogen, and effusion can reduce the content of free water in kerosene, and the experiment and transmitting for improving the very low kerosene of water content for rocket engine use.
Description
Technical field
The invention belongs to Aeronautics and Astronautics technical field of engines, and in particular to a kind of space flight kerosene dissolving water filtering method.
Background technology
A new generation of China rocket engine uses liquid oxygen and space flight kerosene for propellant.It is each to adapt to new generation's carrier rocket
Launching site concrete condition (the lowest temperature temperature of engine kerosene entrance experiment is -25 DEG C) needs to carry out coal to add tight examination
The certification test that oil temperature is -30 DEG C~-25 DEG C.Therefore, kerosene need to be cooled to corresponding temperature and carries out examination test run.
It finds that -15 DEG C~-20 DEG C analysis can be approximately less than in low temperature due to the dissolving moisture content in kerosene in the test run of early period
Going out distribution of particles not equal ice crystal, the ice crystal of bulky grain is also big compared with filter screen, can block filter screen in long period commissioning process,
Kerosene inlet pressure is caused to decline the failure so as to cause test run.
Conventional dissolving water minimizing technology is filtration method, and ice crystal is removed by the method for filtering.Due to aqueous in kerosene
Amount is very big, is modeled to filter, and it is 82394mm to analyze its inner surface screen surface product2If the net thickness in icing face is
0.5mm~1mm.It is 0.041kg~0.081kg that ice quality, which is precipitated, after estimation crystallization accordingly, by being blocked by filter in recycling
The method that the ice crystal cut takes out, can gradually remove the moisture in kerosene.But needing to recycle many times could complete, and consider simultaneously
The content of dissolving water in kerosene and the local temperature rise generated when removing filter, also part ice crystal melt, this is just
Needing to carry out more cycle-indexes just can be cleared by ice crystal.The method is complicated for operation due to than relatively time-consuming, and deicing effect
Not significantly.
Invention content
In order to solve the problems in background technology, the present invention provides one kind taking the effective space flight of short and deicing
Kerosene dissolves water filtering method.
The specific technical solution of the present invention is：
1) nitrogen when filling blasts；
When filling kerosene into container, nitrogen is blasted into equipment and is inserted into kerosene charging line end, uses dew point for -79.5
DEG C, the nitrogen that purity is 99.95% carries out nitrogen to kerosene and blasts, and persistently blasts nitrogen 1 hour, utilizes filling kerosene and nitrogen
Opposite flow at high speed increases the contact area of moisture content and nitrogen in kerosene, is carried out to the moisture content in kerosene using nitrogen preliminary
It absorbs；
2) nitrogen after the completion of filling blasts；
2.1) nitrogen of container bottom blasts；
It is -79.5 DEG C to be filled with dew point from container bottom after the completion of filling, the nitrogen that purity is 99.95%, holding container pressure
Power forces the moisture in nitrogen and kerosene to repeat to contact, and the moisture content in kerosene is reabsorbed in 1.1 atmospheric pressure；Often
Saturated gas was excluded every 10 minutes, measures the water content of nitrogen in saturated gas, is re-filled with new nitrogen, cycle is multiple, until
The water content in kerosene is measured less than until 10ppm；
2.2) nitrogen in the case of not cooling down blasts；
After measuring in container kerosene water content and being less than 10ppm, by the case where not cooling down by pump by coal
Oil is recycled to container top by container bottom, and persistently carries out nitrogen in cyclic process and blast, and lasts about 30min, by kerosene
In water content be reduced to 5-6ppm；
3) heat exchanger liquid nitrogen cooling cycle drum nitrogen
By liquid nitrogen be that refrigerant carries out circulation temperature lowering using heat exchanger to kerosene, and blast in cyclic process dew point be-
79.5 DEG C, the nitrogen that purity is 99.95%, until the water content in kerosene is reduced to 3.6ppm.
Cool down to kerosene as refrigerant due to the use of liquid nitrogen, cannot directly stop recycling in cyclic process, it is necessary to first
It could stop cycle after refrigerant is excluded completely, kerosene in container can not be carried out in this step in time and stand sampling, to improve work
Make efficiency and use to be reduced to whether -30 degree, flow decline are sentenced more than 2% in temperature by observing kerosene circular flow
It is disconnected that water is precipitated, and judge whether to have reached the purpose that required moisture is less than 3.6ppm indirectly, it can stop as met
Moisture removal operates, and by moisture chemical examination come verification time moisture.
The beneficial effects of the invention are as follows：
1, method of the invention can make the free water in kerosene with nitrogen, effusion by rousing drying nitrogen to kerosene
The content of free water in kerosene can be reduced, the experiment and transmitting for improving the very low kerosene of water content for rocket engine make
With.
2, method of the invention rouses nitrogen during kerosene uses liquid nitrogen refrigerant fast cooling to kerosene, can slow down
Free water and dissolving water form the speed of icing core inside kerosene, so as to avoid the icing of kerosene at low temperature.Pass through reality
From the point of view of trampling result, by kerosene heat exchange before and heat transfer process in, to kerosene carry out rouse nitrogen, can successfully solve kerosene-
Test System for Rocket Engine Test is carried out in the case of 30 DEG C, the problem of filter screen leads to flow blockage is precipitated in ice crystal.
Description of the drawings
Fig. 1 is flow chart of the method for the present invention；
Kerosene oil flow situation of change curve when Fig. 2 kerosene uses liquid nitrogen refrigerant fast cooling；
Pressure flow curve when Fig. 3 does not filter out the failure of technique using dissolving water.
Fig. 4 normal pressure flow curves after using dissolving water to filter out technique.
Specific implementation mode
The present invention provides a kind of space flight kerosene to dissolve water filtering method, and this method takes short and deicing significant effect.
The specific steps of this method are as shown in Figure 1：
Nitrogen when step 1) fills blasts；
When filling kerosene into container, nitrogen is blasted into equipment and is inserted into kerosene charging line end, uses dew point for -79.5
DEG C, the nitrogen that purity is 99.95% carries out nitrogen to kerosene and blasts, and persistently blasts nitrogen 1 hour, utilizes filling kerosene and nitrogen
Opposite flow at high speed increases the contact area of moisture content and nitrogen in kerosene, is carried out to the moisture content in kerosene using nitrogen preliminary
It absorbs；
Nitrogen after the completion of step 2) filling blasts；
The nitrogen of step 2.1) container bottom blasts；
It is -79.5 DEG C to be filled with dew point from container bottom after the completion of filling, the nitrogen that purity is 99.95%, holding container pressure
Power forces the moisture in nitrogen and kerosene to repeat to contact, and the moisture content in kerosene is reabsorbed in 1.1 atmospheric pressure；Often
Saturated gas was excluded every 10 minutes, measures the water content of nitrogen in saturated gas, is re-filled with new nitrogen, cycle is multiple, until
The water content in kerosene is measured less than until 10ppm；
Nitrogen in the case of step 2.2) does not cool down blasts；
After measuring in container kerosene water content and being less than 10ppm, by the case where not cooling down by pump by coal
Oil is recycled to container top by container bottom, and persistently carries out nitrogen in cyclic process and blast, and lasts about 30min, by kerosene
In water content be reduced to 5-6ppm；
Step 3) heat exchanger liquid nitrogen cooling cycle drum nitrogen
By liquid nitrogen be that refrigerant carries out circulation temperature lowering using heat exchanger to kerosene, and blast in cyclic process dew point be-
79.5 DEG C, the nitrogen that purity is 99.95%, until the water content in kerosene is reduced to 3.6ppm.
By certain of test bay twice for low temperature kerosine test, experiment for the first time due to not filtering out technique using dissolving water,
In commissioning process due under low temperature ice crystal precipitation result in scram, refer to Fig. 3.It is carried out subsequently through the technique of this patent
Dissolving water filters out, and it is 20ppm to fill before kerosene filling from kerosene library sample examination water content, by process vessel filling process
Middle bulging nitrogen carries out container bottom drum 10 cycles of nitrogen to reach moisture in kerosene being 5.8ppm after filling；Then it has carried out not
Down cycles rouse nitrogen, and heat exchange cycle rouses nitrogen, and in kerosene heat transfer process, kerosene circular flow is stablized, and maintains 12.0- always
13dm3/ s, refers to Fig. 2.After temperature drops to -27 DEG C, the kerosene of kerosene heat-exchange system is excluded, kerosene shielding is pumped into respectively
Mouth and outlet filter dismounting are checked, it is found that filter is in apparent good order and condition, no icing phenomenon.Meanwhile kerosene is carried out in time
Sample examination, as a result the moisture in kerosene is less than 3.6ppm.
The method filtered out according to this dissolving water carries out that treated kerosene, is applied to the low temperature kerosene supply of rocket engine
In, using effect is good；Do not occur the stopping state formed due to ice crystal during entire experiment, pressure in commissioning process and
Changes in flow rate situation is shown in Fig. 4 in detail.
Claims (1)
1. a kind of space flight kerosene dissolves water filtering method, which is characterized in that include the following steps：
1) nitrogen when filling blasts；
When filling kerosene into container, nitrogen is blasted into equipment and is inserted into kerosene charging line end, uses dew point for -79.5 DEG C,
The nitrogen that purity is 99.95% carries out nitrogen to kerosene and blasts, and persistently blasts nitrogen 1 hour, utilizes filling kerosene and nitrogen phase
To flow at high speed, increase kerosene in moisture content and nitrogen contact area, the moisture content in kerosene is tentatively inhaled using nitrogen
It receives；
2) nitrogen after the completion of filling blasts；
2.1) nitrogen of container bottom blasts；
It is -79.5 DEG C to be filled with dew point from container bottom after the completion of filling, and the nitrogen that purity is 99.95%, holding container pressure exists
1.1 atmospheric pressure force the moisture in nitrogen and kerosene to repeat to contact, and the moisture content in kerosene are reabsorbed；Every 10
Minute excludes saturated gas, measures the water content of nitrogen in saturated gas, is re-filled with new nitrogen, and cycle is multiple, up to measuring
Water content in kerosene is less than until 10ppm；
2.2) nitrogen in the case of not cooling down blasts；
After measuring in container kerosene water content and being less than 10ppm, by the case where not cooling down by pump by kerosene by
Container bottom is recycled to container top, and persistently carries out nitrogen in cyclic process and blast, and lasts about 30min, will be in kerosene
Water content is reduced to 5-6ppm；
3) heat exchanger liquid nitrogen cooling cycle drum nitrogen
It is that refrigerant carries out circulation temperature lowering using heat exchanger to kerosene, and it is -79.5 to blast dew point in cyclic process by liquid nitrogen
DEG C, the nitrogen that purity is 99.95%, until the water content in kerosene is reduced to 3.6ppm.
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| CN201610817666.5A CN106310715B (en) | 2016-09-12 | 2016-09-12 | A kind of space flight kerosene dissolving water filtering method |
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| CN201610817666.5A CN106310715B (en) | 2016-09-12 | 2016-09-12 | A kind of space flight kerosene dissolving water filtering method |
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| US2730240A (en) * | 1952-02-08 | 1956-01-10 | Union Oil Co | Dehydration of oils |
| CN1023072C (en) * | 1990-03-31 | 1993-12-15 | 沈汉石 | Method for separation of oil from water and oil purification equipment |
| DE102009008676A1 (en) * | 2009-02-12 | 2010-08-19 | Hydac Filtertechnik Gmbh | Device for a fuel filter system |
| CN202490466U (en) * | 2012-03-21 | 2012-10-17 | 北京航天星汉科技有限公司 | Fuel oil dehydration and deoxygenation preparation device |
| CN103816697B (en) * | 2014-02-17 | 2016-04-13 | 天津大学 | A kind of method of Aero-Space fuel oil on-line continuous dehydration and deoxidation |
| CN103980936B (en) * | 2014-05-29 | 2016-03-30 | 沈阳航天新光集团有限公司 | The online dehydration and deoxidation equipment of fuel |
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