CN2896280Y

CN2896280Y - Precise testing device of condensation point of petroleum product

Info

Publication number: CN2896280Y
Application number: CN 200620001861
Authority: CN
Inventors: 税碧垣; 关中原
Original assignee: China Petroleum and Natural Gas Co Ltd
Current assignee: China Petroleum and Natural Gas Co Ltd
Priority date: 2006-01-26
Filing date: 2006-01-26
Publication date: 2007-05-02
Anticipated expiration: 2016-01-26

Abstract

The utility model relates to an accurate solidifying point testing device for the test not included in the other category and the petroleum products pertaining to the field of petroleum industry technology which is joined up by an out-wrapped circulation water jacket [2] connected with a hot water inlet [1], a hot water outlet [6] and a program-controlled water bath and the bottom center of the oil tank [30] is provided with pipe section that is connected to the miniature measuring pump [26] through the oil tank outlet valve [29]. The outlet of the miniature measuring pump [26] is connected to the ring pipeline [27] and communicated with the pipeline at the top of the oil tank [30]. From the outlet of the miniature measuring pump [26] on the ring pipeline [27], a plurality of orifices are opened up and connect a plurality of sample container valves [25], [24], [23], [22] and [21] in series. After entering the cold bath [8], the orifices are connected by the hose [11] respectively to the bottom of a sample container [10] in the cold bath [8]. The cold bath [8] is connected with a cooling coil [7] that is connected with a low-temperature program-controlled water bath, is filled with the cooling liquid therein and is provided with a thermometer [4] on the top. The device is characterized in that the operation is easy and convenient, the testing oil sample has not history of structural damage, the precision is high and the repeatability is good.

Description

The accurate proving installation of petroleum products questionable points

Technical field

The utility model is the accurate proving installation of the petroleum products questionable points of test petroleum products questionable points, relates to test not to be covered of other class and petroleum industry technical field.

Background technology

Petroleum products questionable points is a crucial technical indicator in the oil quality characteristic test, its expression be that petroleum products is cooled to the maximum temperature of liquid level when not mobile under test condition.For crude oil, condensation point has determined inlet temperature necessary in pipe conveying procedure, thereby determined also which kind of delivery technology whole delivery line adopts, in case and stopping transportation can allow time of stopping transportation, be the parameter of must emphasis in pipe design and the operational process considering; For product oil diesel oil particularly, it has determined product oil to allow the ambient temperature conditions of using.No matter from which kind of angle, the test of petroleum products questionable points all is crucial.Moreover, precision of test result has directly determined equipment disposition and operation process on engineering, and with operating cost and energy-saving and cost-reducing directly related.In view of this, various countries formulate the testing standard that petroleum products questionable points is arranged mostly, with the foundation of following as industry.As according to People's Republic of China's " petroleum products questionable points determination method " (GB/T 510-83), its condensation point assay method is defined as: the test tube (height 160 ± 10mm that oil sample is contained in regulation, internal diameter 20 ± 1mm, outer wall at 30mm at the bottom of the distance has an annular graticule) in, earlier oil sample is heated to 50 ± 1 ℃, when test tube is put into the temperature that is cooled to expect in the sleeve pipe, test tube was tilted 45 ° through 1 minute, whether the observation liquid level moves, then reheat 50 ± 1 ℃ as moving, continue to be cooled to than test temperature last time low 4 ℃ or low temperature more, till its test temperature makes liquid level can stop to move, reheat 50 ± 1 ℃ afterwards again, continue to be cooled to than test temperature last time high 4 ℃ or higher temperature mensuration, till certain test temperature has had liquid level to move, after finding the condensation point temperature range like this, hang down 2 ℃ or the mobile high 2 ℃ of tests again of temperature of ratio with regard to employing than the temperature that moves, so repeatedly, can make liquid level motionless and improve 2 ℃ when liquid level is moved up to definite certain test temperature, just get the condensation point of the motionless temperature of liquid level as sample.And the necessary replication of regulation condensation point, begin test temperature for the second time than measured condensation point is high 2 ℃ for the first time.The difference that its repeatability requires same operator to measure two results is no more than 2 ℃, and the difference of two laboratory results is no more than 4 ℃.From as can be seen last, the mensuration program is numerous and diverse and may cause than mistake.Therefore, in People's Republic of China's oil and gas industry standard " condensation point of crude oil determination method " (SY/T 0541-94), carried out simplifying significantly and having adjusted the criterion of condensation point: regulation is preheating to 50 ± 1 ℃ oil sample behind the test tube of packing into, with the cooling velocity cooling samples of 0.5～1.0 ℃/min when being higher than 8 ℃ of expection condensation points, the flowability of a sample of 2 ℃ of observation is whenever fallen, until with test tube horizontal positioned 5s and the maximum temperature of sample when not flowing is condensation point.In the sector standard, 2～4 test tubes of general use, tilt slightly during regulation observation liquid level, if liquid level moves, then in 3s, put back to sleeve pipe and continue cooling, and as with test tube horizontal positioned 5s and sample when also having mobile sign, then put back to sleeve pipe rapidly and continue 1 ℃ or 2 ℃ of cooling, hardship does not move, and then this temperature is a condensation point, otherwise the sample revision test of changing oil.The same national standard of its repeatability regulation.

No matter be national standard or industry standard, all there is very big defective: for industry standard, after tilting, continue cooling test science not, because moving, liquid level also shows the structure of having destroyed formation under the crude oil low temperature, surveying can not be accurately again, and in moving process, be difficult to avoid shaking or temperature variation does not impact the structure that forms under the crude oil low temperature, but like this numerous and diverse running program time and effort consuming, and under non-airtight condition, cause the light constituent volatilization to influence test findings along with repeating heating.In addition, because the two all adopts circular test tube, because heat transferred is difficult to guarantee that the oil sample central temperature is consistent with the edge, and it is regular and be convenient to observe the liquid level situation of movement to be difficult to assurance oil sample liquid level.Main is that final condensation point test result is difficult to accomplish higher accuracy.

The utility model content

The purpose of this utility model be design a kind of test petroleum products questionable points simple to operate, save time, the accurate proving installation of the oil sample non-structure destroys history, accuracy and accuracy are high petroleum products questionable points.

The utility model realizes that the technical scheme of above-mentioned purpose is the regulation with reference to existing standard, it is the oil tank 30 of outsourcing cyclic water jacket 2 is made of oil sample 3 annulus line 27 of miniature volume pump 26 and insulation circulation line, on oil sample 3 circulation lines, pick out many pipeline sections side by side to 8 li of cryostats, termination one airtight sample holder 10 on the every pipeline section.Concrete formation as shown in Figure 1, be exactly outsourcing cyclic water jacket 2 and have the bottom center of the oil tank 30 that hot water inlet 1 and hot water outlet 6 be connected with program control water-bath to have pipeline section to connect miniature volume pump 26 through oil tank outlet valve 29, miniature volume pump 26 outlet T-Ring shape pipelines 27 also are communicated with it to oil tank 30 tops, begin out a plurality of mouthfuls of a plurality of sample holder valves 25 of connection upwards arranged side by side from miniature volume pump 26 exits of

annulus line

27,24,23,22,21, enter cryostat 8 backs are respectively connect a sample holder 10 in cryostat 8 respectively by flexible pipe 11 bottom, be provided with the cooling coil 7 that is connected the program control water-bath of low temperature by the cold liquid of cooling coil inlet 31 and the cold liquid outlet 32 of cooling coil in the cryostat 8, in the cryostat 8 liquid coolant is arranged, and the thermometer 4 of packing at the top.Wherein the forward plane of structure of a row sample holder 10 is clear glass or organic glass observation window or can installs magnifier again additional in the cryostat 8 of cuboid container, and can observe oil sample graticule 36 in each sample holder 10, cooling coil 7 is installed behind the sample holder 10, between cooling coil 7 and the sample holder 10 background light can be installed, with convenient observation.There is cryostat inlet 9 at cryostat 8 tops so that pour into liquid coolant and rectangular mouthful 14 of a plurality of cryostat, and in the inboard of each mouthful or the outside paste lid and face the flexible heat-insulating layer that mouth has joint-cutting so that the adjuster bar 34 of regulating fixing sample holder 10 is by upright position inclination 45.Sample holder 10 (see figure 3)s are cuboid closed containers of clear glass or organic glass material, and its bottom center has oil sample 3 to import and export pipe, and the bottom is seated at the bracket 35 interior and chuckings of sample holder frame 13.The structure of sample holder frame 13 as shown in Figure 2, it is made up of support plate 33, adjuster bar 34, bracket 35 and hinge axis 12, become the porose bracket of flute profile and bottom land central authorities 35 to be connected by hinge axis 12 hinges with the top of rectangle support plate 33 on one side, the bottom of support plate 33 and cryostat 8 inner bottom parts are connected, and bracket 35 is connected at the hinge place and one stretches out adjuster bar 34 outside the cryostat 8 vertically upward and from cryostat rectangular mouthful 14 with bracket 35.Cooperate with adjuster bar 34, the cryostat that cryostat 8 top adjuster bars 34 stretch out corrects and sample holder 10 is in vertical position and 45 ° the position of tilting for rectangular mouthfuls 14 liang.The groove of the bracket 35 here will with sample holder 10 wringing fits.

Description of drawings

The accurate proving installation pie graph of Fig. 1 petroleum products questionable points

Fig. 2 sample holder shelf structure figure

Fig. 3 sample holder synoptic diagram

Wherein

1-hot water inlet 2-cyclic water jacket

3-oil sample 4-temperature juice

5-stirrer 6-hot water outlet

7-cooling coil 8-cryostat

9-cryostat inlet 10-sample holder

11-flexible pipe 12-hinge axis

Rectangular mouthful of 13-sample holder frame 14-cryostat

15-heat-insulation layer 16-pipeline rebound valve

17-recycling can inlet valve 18-recycling can

19-recycling can outlet valve 20-cryostat tapping valve

21-sample holder valve 22-sample holder valve

23-sample holder valve 24-sample holder valve

The miniature volume pump of 25-sample holder valve 26-

27-annulus line 28-valve

29-oil tank outlet valve 30-oil tank

The cold liquid outlet of the cold liquid inlet of 31-cooling coil 32-cooling coil

33-support plate 34-adjuster bar

35-bracket 36-oil sample graticule

Embodiment

Embodiment. concrete enforcement of the present utility model is described and the utility model is further described with this example.The formation of this example as shown in Figure 1, from outside be surrounded by the oil tank 30 bottom center openings of cyclic water jacket 2 to external oil tank outlet valve 29, after threeway connects valve 28 downwards, other end T-Ring shape pipeline 27, miniature volume pump 26, pipeline rebound valve 16 turns back to oil tank 30 tops and constitutes the oil sample circulation line of test, behind miniature volume pump 26, upwards connect 5

sample holder valves

25,24,23,22,21 and respectively connect respectively in the ECL of a sample holder 10 to the cryostat 8, cooling coil 7 is installed in the cryostat 8, the front is a clear glass, sample holder 10 is equipped with background light behind, the rectangular mouth 14 of the cryostat of cryostat inlet 9 and corresponding 5 sample holders 10 is arranged at cryostat 8 tops, cryostat tapping valve 20 is arranged at cryostat 8 bottoms, and circulation line connects recycling can 18 through recycling can inlet valve 17.Wherein oil tank 30 volumes are 1 liter, annulus line 27 is a Φ 10mm steel pipe, the thick poly-ethylbenzene pipe of outsourcing 10mm, miniature volume pump 26 is selected MS-CA ISMATEC wriggling volume pump for use, pipeline rebound valve 16, recycling can inlet valve 17, recycling can outlet valve 19, cryostat tapping valve 20,

sample holder valve

21,22,23,24,25, the model of oil tank outlet valve 29 and valve 28 is the manual stainless steel through type of Q41F ball valves, cryostat 8 is 800 * 200 * 100mm cuboid container, the high 80mm of cooling liquid level in the cryostat 8, sample holder 10 is high 100mm, wide 20mm, the cuboid transparent glass container of thick 5mm, the top is airtight, bottom center has outside Φ 3m, the long 10mm mouth of pipe, flexible pipe 11 is Φ 5mm, long 50m stainless steel flexible hose, one end is enclosed within outside the mouth of pipe under the sample holder 10, the other end is placed on the outlet of each sample holder valve, and fixedly the sample holder frame 13 of sample holder 10 is welded on the metal base plate in the cryostat 8.The structure of sample holder frame 13 as shown in Figure 2, wherein bracket 35 is converted into 5 * 5mm flute profile and is made a call to a Φ 4m hole in bottom land central authorities by thick 2mm steel plate, so that the mouth of pipe at 10 ends of sample holder stretches out, support plate 33 is the steel plate of wide 5mm, high 70mm, thick 3mm, its following and cryostat 8 inner bottom platings welding, the top is connected with bracket 35 hinges by the hinge axis 12 of Φ 3m, up vertically welds the adjuster bar 34 of Φ 3mm, long 160mm at bracket 35 hinge places.The strip mouth at cryostat 8 tops is wide 3mm, long 130mm.In oil tank 30, insert 0.5 liter of Daqing crude oil, starting temperature controlled water bath heats to 50 ℃ to the oil sample in the oil tank 30 3, shut-off valve 28, recycling can inlet valve 17, open oil tank outlet valve 29, pipeline rebound valve 16, starting miniature volume pump 26 makes oil sample 3 enter the oil sample circulation line, be preheating to when consistent with oil temperature to circulation line, order is opened

sample holder valve

25,24,23,22,21 and is made oil sample 3 enter 5 sample holders 10 to arrive oil sample graticule 36 positions, close

sample holder valve

25,24,23,22,21; Starting the program control water-bath of low temperature starts working cooling coil 7, because of the expection condensation point of Daqing crude oil is approximately about 31 ℃, stop cooling when dropping to 32.5 ℃ so treat cryostat 8 temperature, keep constant temperature 2min, with first sample holder 10 inclination 45s, keep 1min, it is significantly mobile to observe the oil sample liquid level, continues 0.5 ℃ to 32.0 ℃ constant temperature 2min of cooling, and second sample holder 10 tilted 45 °, observing liquid level still has mobile, continuation is with 0.5 ℃ of gradient cooling, constant temperature, step before repeating, reach 1min to the 5th sample holder 10 inclination 45s after, observe the oil sample liquid level and do not move, illustrate that condensation point is between 30.5 ℃ to 31.0 ℃.From the beginning test again, when cryostat 8 temperature drop to 32 ℃, stop cooling specifically, keep constant temperature 2min,, keep 1min, observe liquid level and still have mobile first sample holder 10 inclination 45s; Continue to cool to 31.0 ℃ of constant temperature 2min, second sample holder 10 tilted 45 ° to keep 1min, observe liquid level and still have trace to move; Continue to cool to 30.8 ℃ of constant temperature 2min, the 3rd sample holder 10 tilted 45 ° to keep not observe any mobile of liquid level behind the 1min, therefore testing the condensation point value is 30.8 ℃.This test is successively shared just to be finished smoothly less than two hours.Tested twice again as stated above, the condensation point value is respectively 30.6 ℃, 31.0 ℃ as a result.The repeatability of three test results is no more than 0.5 ℃.Different testers use same device and same method in another laboratory, and same Daqing crude oil is tested, and the difference of test result is no more than 1.5 ℃.

As seen, this device is easy and simple to handle, quick, and the device assembling is easy to realize that test oil sample non-structure destroys history, degree of accuracy height, good reproducibility easily.

Claims

1. test the accurate proving installation of a kind of petroleum products questionable points of petroleum products questionable points, it is characterized in that the oil tank (30) of outsourcing cyclic water jacket (2) is made of the annulus line (27) of miniature volume pump (26) and insulation the circulation line of oil sample (3), on circulation line, pick out many pipeline sections side by side to cryostat (8) lining, termination one airtight sample holder (10) on the every pipeline section.

2. the accurate proving installation of petroleum products questionable points according to claim 1, it is characterized in that at outsourcing cyclic water jacket (2) and have the bottom center of the oil tank (30) that hot water inlet (1) and hot water outlet (6) be connected with program control water-bath to have pipeline section to connect miniature volume pump (26) through oil tank outlet valve (29), miniature volume pump (26) outlet T-Ring shape pipeline (27) also is communicated with it to oil tank (30) top, open a plurality of mouthfuls from miniature volume pump (26) exit of annulus line (27) and upwards connect a plurality of sample holder valves (25) side by side, (24), (23), (22), (21), enter cryostat (8) back is respectively connect the sample holder (10) in cryostat (8) respectively by flexible pipe (11) bottom, the cooling coil (7) that connects the program control water-bath of low temperature is arranged in the cryostat (8), and in liquid coolant is housed, thermometer (4) is equipped with at the top.

3. the accurate proving installation of petroleum products questionable points according to claim 1 and 2, it is characterized in that described cryostat (8) is the cuboid container, cryostat (8) is clear glass or organic glass at the forward plane of structure of a row sample holder (10), or can install magnifier again additional, sample holder (10) back is equipped with cooling coil (7) simultaneously, between cooling coil (7) and the sample holder (10) background light can be installed, cryostat inlet (9) and rectangular mouthful of a plurality of cryostat (14) are arranged at cryostat (8) top, and inboard or outside subsides lid in each cryostat rectangular mouthful (14) face the flexible heat-insulating layer that mouth has joint-cutting, and cryostat tapping valve (20) is arranged at the bottom.

4. the accurate proving installation of petroleum products questionable points according to claim 1 and 2 is characterized in that described sample holder (10) is the cuboid closed container of clear glass or organic glass material, and its bottom center has oil sample (3) to import and export pipe.

5. the accurate proving installation of petroleum products questionable points according to claim 1 and 2, it is characterized in that described sample holder frame (13) is by support plate (33), adjuster bar (34), bracket (35) and hinge axis (12) are formed, become the porose bracket (35) of flute profile and bottom land central authorities to be connected by hinge axis (12) hinge with the top of rectangle support plate (33) on one side, the bottom of support plate (33) and cryostat (8) inner bottom part are connected, bracket (35) is connected at the hinge place and one stretches out adjuster bar (34) cryostat (8) outside vertically upward and from cryostat rectangular mouthful (14) with bracket (35), and in the inboard of cryostat rectangular mouthful (14) or the outside post flexible heat-insulating layer with the isometric joint-cutting of mouth.