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Method for testing heat value of volatile liquid sample

A volatile liquid and testing method technology, applied in the detection field, can solve problems that cannot be solved fundamentally, and achieve the effects of improving detection speed and experimental success rate, simple operation, and high hardness

Inactive Publication Date: 2020-02-18
SHANDONG NON METALLIC MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the openness of zeolite and activated carbon porous materials, the problem of volatilization of liquid samples can only be alleviated to a certain extent, and cannot be fundamentally solved.

Method used

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  • Method for testing heat value of volatile liquid sample

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Experimental program
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Effect test

Embodiment （ 1

[0027] In this embodiment, the volatile liquid sample for calorific value test is liquid aviation kerosene.

[0028] During the calorific value test, the device used for encapsulating liquid aviation kerosene is an encapsulating capsule, which is a two-section structure consisting of two parts, the capsule body 1 and the capsule cap 2, which are white and translucent.

[0029] When preparing encapsulated capsules, first take a 10L flask, add 4000g of water, heat it in a water bath to 85°C, and stir for 1min until the temperature of the water in the flask is uniform; then slowly add 850g of hypromellose and 100g of carrageenan in turn while stirring and 100g glycerin, continue to stir and mix for 20min until a uniform glue is formed, then cool to 65°C and keep the temperature for 1h, then dip in the glue and rotate to form a film, dry at 34°C, and demould to prepare capsule body 1 and capsule cap2.

[0030] The calorific value determination method of aviation kerosene specific...

Embodiment （ 2

[0039] The encapsulated capsule in this embodiment differs in structure from that of embodiment (1) in that: figure 1 As shown, on the outer side of the capsule body 1, a circumferential semicircular protrusion is set at a distance of 2 mm from the opening, and its outer diameter is 0.5 mm; on the inner side of the capsule cap 2, an axial semicircular groove is set at a distance of 1.5 mm from the opening, and its outer diameter Diameter 0.5mm.

[0040] When preparing encapsulated capsules, first add 3500g of water to a 10L flask, heat it in a water bath to 80°C, and stir for 1min until the temperature of the water in the flask is uniform; then slowly add 750g of hypromellose and 50g of carrageenan in turn while stirring , 20g carrageenan, 10g sorbitol and 40g glycerin, continue to stir and mix for 30min until a uniform glue is formed, then cool to 60°C and keep the temperature for 1.5h, and then use the outer ring 2mm away from the front face to set the outer diameter A 0.5m...

Embodiment （ 3

[0043] The difference with embodiment (two) is:

[0044] Both the protrusion on the outside of the capsule body 1 and the groove on the inside of the capsule cap 2 are semi-elliptical.

[0045] The preparation method of encapsulated capsules: First, add 2500g of water into a 10L flask, heat it in a water bath to 70°C, and stir for 50s until the temperature of the water in the flask is uniform; then slowly add 650g of hypromellose and 30g of fruit Glue, 20g carrageenan, 10g sorbitol, and 50g glycerin, continue to stir and mix for 40min until a uniform glue solution is formed, then cool to 50°C for 0.5h at a constant temperature, and then set an outer ring with a distance of 2mm from the front end. A semi-elliptical convex glass rod with a diameter of 0.5 mm is dipped in glue and rotated to form a film, dried at 40° C., and demolded to obtain a capsule body 1 and a capsule cap 2 respectively.

[0046] Using the encapsulated capsules prepared in this example, according to the te...

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Abstract

The invention, which belongs to the technical field of detection, discloses a method for testing a heat value of a volatile liquid sample. A novel encapsulation capsule for encapsulating a volatile liquid sample is prepared by hydroxypropyl methyl cellulose (HPMC), water, a gel agent and a plasticizer. The novel encapsulation capsule has advantages of high hardness, difficulty in breaking, complete combustion, few residues, low water content, stable property, capability of being stored for a long time at room temperature and the like; the re-inspection rate is reduced; and the detection speedand the experiment success rate are increased. Furthermore, a bulge and a groove which play a locking role are arranged at the corresponding positions of front ends of ae capsule body and a capsule cap of the encapsulation capsule to realize effective sealing, so that a problem of the quality deviation caused by volatilization loss of a volatile sample is solved. Besides, the method also has advantages of simple operation, high repeatability, high heat value determination accuracy and the like.

Description

technical field [0001] The invention belongs to the technical field of detection, in particular to a method for testing the calorific value of volatile liquid samples. Background technique [0002] The calorific value is an important indicator to characterize fuel oil, and there are indicator requirements in various fields of sea, land and air. For example, jet fuel is the fuel of our army's main combat aircraft, and the national mandatory standard GB 438 jet fuel specification clearly requires its calorific value to be greater than 10250 kcal / kg. At present, the calorific value of domestic blended fuel oil is usually between (9200-9500) kcal / kg. If the fuel oil with a calorific value of 9200 kcal / kg is compared with the average calorific value of bonded fuel oil of 9613 kcal / kg, it is equivalent to a heat loss of 4.3%. , implying a 1.5% speed loss. Therefore, it is of great significance to accurately measure the calorific value of fuel oil. There are mainly two methods f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/22
CPCG01N25/22
Inventor 王倩倩周燕萍王雪蓉刘运传肖勇段剑孙岩冯典英姚凯马衍东
Owner SHANDONG NON METALLIC MATERIAL RES INST
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