CN102527088A

CN102527088A - Pressure-reducing type asphalt four-component separating device

Info

Publication number: CN102527088A
Application number: CN2011104415838A
Authority: CN
Inventors: 高莉宁; 赵澜; 陈华鑫; 贺孟霜; 陈改霞; 张晓峰
Original assignee: Changan University
Current assignee: Changan University
Priority date: 2011-12-19
Filing date: 2011-12-19
Publication date: 2012-07-04
Anticipated expiration: 2031-12-19
Also published as: CN102527088B

Abstract

The invention discloses a pressure-reducing type asphalt four-component separating device, which consists of a glass adsorbing column, a collecting component part and a pressure-reducing control part, and a plurality of groups of test samples are separated at the same time by a four-way flow divider valve by means of reducing pressure in a vacuum-pumping way, applying force by the atmosphere and controlling the flowing speed by a vacuum meter. Impression and labor consumption of the existing pressurizing type asphalt separating four-component test technology are overcome by the pressure-reducing type asphalt four-component separating device, the pressure in a system is controlled by the vacuum meter for providing a stable acting force, and a plurality of groups of tests are carried out at the same time, so that the separating precision and working efficiency are improved. In addition, the work intensity of experiment staff is reduced, and semi automation of the asphalt four-component separation is realized.

Description

Decompression type pitch four component separators

Technical field

The present invention relates to a kind of separated from bitumen device, is a kind of semi-automatic experimental provision of efficient, accurate separate bitumen four components, can isolate the asphalitine of bi tumenf orr oad, saturated branch, fragrance branch and colloid fast, accurately.

Background technology

(T0618-1993) stipulate according to highway engineering pitch and asphalt testing regulations (JTJ052-2000) medium pitch chemical constituent test (four component method), when using the column chromatography chromatogram method to separate saturated branch, fragrance branch and colloid, separate owing to asphalt viscosity is difficult to rely on the deadweight of liquid greatly; Pressurization reaches the separation purpose by the bigeminy rubber ball traditionally; After improving, use air compressor that pressure is provided, still, this pressurization needs testing crew to pressurize in other substantial length of operation; The experimental work amount is big; Human error is big, and the adsorption column internal gas pressure is difficult to control in the separation process, causes that flow rate of liquid differs in the adsorption column; Isolated four component sample randomnesss are big, the experimental data inaccuracy.

Summary of the invention

For the inexactness and consumption manpower property that overcomes existing adding pressure type separate bitumen four constituent tests technology; The purpose of this invention is to provide a kind of pitch four component decompression separation devices, adopt to vacuumize decompression, rely on the atmospheric pressure application of force; Adopt vacuum valve control flow velocity; Not only improved the separation accuracy, and greatly practiced thrift the working time of testing crew, realized semi-automation.

The present invention solves the technical scheme that its realistic problem adopts:

Connect and compose by glass adsorption column, round-bottomed flask and depressed control device; Said glass adsorption column is provided with vacuum extractor, and the bleeding point on it links to each other with decompression, flow-dividing control elements such as vacuum meter, protection bottle, vacuum triple valve, four-hole flow divider and vavuum pumps successively; Following termination liquid head connects round-bottomed flask and collects component.

The glass adsorption column is provided with the decompressor of bleeding, and round-bottomed flask is collected component.

The wall thickness of glass adsorption column should be at least 0.3cm.

The invention has the beneficial effects as follows: this decompression separation device have simple to operate, experimental data stable, save advantages such as human resources, be embodied in: 1. vavuum pump decompression separation, simple to operate, be easy to control, good stability; 2. press in the system and accurately control, guarantee required constant flow rate by pressure vacuum gauge; 3. semi-automatic operation is tested human error and is reduced, and data accuracy improves; 4. the four-hole shunt head realizes that many group samples separate with under the condition, but increases work efficiency and the data comparative; 5. in the separation process, the whole system pressurized, broken glass is not understood outer not spattering, and guarantees the testing crew personal safety.

Description of drawings

Below in conjunction with accompanying drawing and case study on implementation the present invention is further specified.

Fig. 1 is the structural representation of decompression type separator of the present invention.

Fig. 2 is the structure chart of glass adsorption column.

Fig. 1,1 glass adsorption column, 1-1 aspirating hole, 1-2 connect the liquid head, 2 round-bottomed flasks, 3 decompression control sections, 3-1 baro-vacuum gauge, 3-2 are protected bottle, 3-3 vacuum triple valve, 3-4 four-hole flow divider and vavuum pump 3-5.

The specific embodiment

With reference to Fig. 1; Decompression type pitch four component separators mainly are made up of three parts: glass adsorption column 1, collection component part 2 and decompression control section 3; The control section 3 that wherein reduces pressure is made up of vacuum meter 3-1, protection bottle 3-2, vacuum triple valve 3-3, four-hole flow divider 3-4 and vavuum pump 3-5; 3-5 provides gross pressure through vavuum pump, and vacuum meter 3-1 accuracy-control system internal pressure guarantees to separate required constant flow rate.The aspirating hole 1-1 of glass adsorption column 1 is connected with vavuum pump 3-5 with baro-vacuum gauge 3-1, protection bottle 3-2, vacuum triple valve 3-3, four-hole flow divider 3-4 successively; Meeting liquid head 1-2 links to each other with round-bottomed flask 2.

Package unit of the present invention mainly is made up of three parts: glass adsorption column, collection component part and decompression control section.In use, fill fixedly phase of alundum (Al conduct in the glass adsorption column, after flowing phase adds; Whole device forms enclosed system, starts vavuum pump, makes the certain pressure differential of the inside and outside generation of instrument; The flowing phase pressurized gets into cylinder, and after the last appearance, thereby separated pitch separates purpose according to each component reach different with the mutual suction-operated in the flowing phase of fixing phase; In this process, through regulating pressure valve and pressure vacuum gauge to satisfy test required flow rate: 2mL/min～4mL/min

Because be in pressured state during this device work, for the stability and the security that guarantee work, the glass wall of used glass elements all need be thickeied, thickness is greater than 0.3cm.

With Esso 90# bi tumenf orr oad is example, specifies the application of utilization the present invention in pitch four constituent tests.

Case study on implementation 1: separate the concrete operations of one group of sample.

1, preparation

Regulation according to the chemistry constituent test of the T0618-1993 pitch in JTJ052-2000 highway engineering pitch and the asphalt testing regulations (four component method) is prepared: at 500 ℃ of following activation 50g alundum (Al 6h; Slough the normal heptane 100mL of aromatic hydrocarbons; Take by weighing 1.0g left and right sides Esso 90# bi tumenf orr oad test appearance, through boil, after the filtration, concentration the filtrating of 10mL; 3 of 150mL round-bottomed flasks of weighing (asphalitine is not included in the 10mL filtrating after the processing).

2, experimental procedure

(1), according to order assembling decompression type pitch four component separators shown in Figure 1, feeds 50 ± 1 ℃ of recirculated waters;

(2), the charging aperture on the glass adsorption column adds ready 50g alundum (Al, and fixedly phase alundum (Al consolidation is guaranteed in concussion, adds flowing phase normal heptane 30mL; Start vavuum pump, rotation vacuum triple valve communicates with system, enclosed system, and adjusting vacuum is 0.04～0.05MPa, makes normal heptane quick humidification alundum (Al adsorption column;

(3), adsorption column is wetting finish after, slowly rotate the vacuum triple valve and make system lead to atmosphere, add ready 10mL appearance liquid, change No. 1 round-bottomed flask; Rotation vacuum triple valve enclosed system is slowly regulated vacuum to 0.02Mpa; After treating that kind liquid gets into pillar fully, add the 50mL normal heptane, regulate vacuum meter, control vacuum is 0.02～0.05MPa, guarantees that the eluant, eluent flow velocity is 2mL/min～4mL/min, and No. 1 round-bottomed flask is collected saturated branch;

(4), treat that the eluant, eluent normal heptane all gets in the adsorption column, saturated branch is collected and is finished, and rotation vacuum triple valve and atmosphere add 80mL toluene, change No. 2 round-bottomed flask; Rotation vacuum triple valve closed system is regulated vacuum and is guaranteed flow velocity, and No. 2 round-bottomed flasks are collected fragrance and divided;

(5), treat that eluant, eluent toluene all gets into adsorption column after, fragrance divide to be collected and to be finished, rotation vacuum triple valve and atmosphere add 40mL toluene: absolute ethyl alcohol (V: V, 1: 1) mixed solution, change No. 3 round-bottomed flask; Rotation vacuum triple valve closed system, regulating vacuum is that 0.02～0.05MPa guarantees flow velocity; Liquid to be mixed adds 40mL toluene and 40mL absolute ethyl alcohol wash-out after getting into adsorption column successively, and No. 3 round-bottomed flask is collected colloid;

(6), after colloid was collected and accomplished, rotation vacuum triple valve and atmosphere were taken off round-bottomed flask No. 3; Close vavuum pump, dismounting decompression type pitch four component separators, glass cleaning adsorption column.

3, analyze experimental data

(1); Use Rotary Evaporators, remove the eluant, eluent in the round-bottomed flask respectively 1,2, No. 3, and the round-bottomed flask that will fill each component places 105 ℃ ± 5 ℃ of temperature; Vacuum drying 1h in the vacuum drying chamber of vacuum 93kPa ± 1kPa takes out the back and in drier, is cooled to room temperature.

(2), weighing fills the flask of each component and calculates respectively, gets asphalitine, saturated branch, fragrance branch and colloid, and shared percentage is respectively 8.42%, 12.96%, 56.12% and 22.50%.

4, repeated test

(1), repeating step 1-3 takes by weighing about Esso 90# bi tumenf orr oad test appearance 1.0g, gets asphalitine, saturated branch, fragrance branch and colloid, and shared percentage is respectively 8.72%, 12.52%, 56.98% and 21.78%.

(2), the precision of result of the test satisfies in the T0618-1993 pitch chemistry constituent test (four component method) requirement to precision.

5, result of the test

Parallel test twice gets its four constituent content and is respectively asphalitine 8.52%, saturated branch 12.74%, fragrance branch 56.55%, colloid 22.14%.

Case study on implementation 2: separate the concrete operations of three groups of samples simultaneously.

1, preparation

Said according to case study on implementation 1, prepare three groups of same test articles for use, number I, II, III group respectively.

2, experimental procedure

(1); According to order assembling decompression type pitch four component separators shown in Figure 1; Parallel two cover (removing vavuum pump) same apparatus that insert at two valve port places of four-hole flow divider, the circulation intake-outlet is connected with hose according to the order that goes out on advancing down successively in the adsorption column, feeds 50 ℃ ± 1 ℃ recirculated water;

(2), I, II, III group be independent operation separately all, and concrete steps are with step (2), (3), (4), (5), (6) among the case study on implementation 1-2.

3, analyze experimental data

(1) uses Rotary Evaporators; Remove in I, II, the III group eluant, eluent in the round-bottomed flask respectively 1,2, No. 3; And the round-bottomed flask that will fill each component places 105 ℃ ± 5 ℃ of temperature, 1h in the vacuum drying chamber of vacuum 93kPa ± 1kPa, the back room temperature that in drier, is cooled to of taking-up.

(2) weighing fills the flask of each component and calculates corresponding data respectively, and is as shown in table 2: (respectively organize the pitch gross mass and be 1.0000g)

Table 2

	Asphalt content (%)	Saturated minute content (%)	Fragrance divides content (%)	Gum level (%)
					The I group	8.71	12.42	56.78	22.09
The II group	8.58	12.99	55.98	22.45
					The III group	8.79	12.86	56.30	22.05
On average	8.69	12.76	56.35	22.20

(3) analyzing the contrast corresponding data can know:

The result who separates three groups of samples simultaneously satisfies in the T0618-1993 pitch chemistry constituent test (four component method) requirement to precision, and also satisfies the repeated requirement of four components test with the result of case study on implementation 1.

Claims

1. decompression type pitch four component separators; Connect and compose by glass adsorption column (1), round-bottomed flask (2) and depressed control device (3); It is characterized in that; Said glass adsorption column (1) is provided with vacuum extractor, and the bleeding point on it (1-1) links to each other with decompression, flow-dividing control elements such as vacuum meter (3-1), protection bottle (3-2), vacuum triple valve, four-hole flow divider and vavuum pumps successively; Following termination liquid head (1-2) connects round-bottomed flask and collects component.

2. decompression type pitch four component separators according to claim 1 is characterized in that the glass adsorption column is provided with the decompressor of bleeding, and round-bottomed flask is collected component.

3. decompression type pitch four component separators according to claim 1 is characterized in that the wall thickness of glass adsorption column should be at least 0.3cm.