CN211784921U

CN211784921U - Determinator for determining carbonate content of calcareous sand

Info

Publication number: CN211784921U
Application number: CN201921425556.XU
Authority: CN
Inventors: 宋睿; 叶薇; 程万强; 欧阳丽; 陈格君; 高正
Original assignee: PowerChina Huadong Engineering Corp Ltd
Current assignee: PowerChina Huadong Engineering Corp Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-10-27
Anticipated expiration: 2029-08-30

Abstract

The utility model provides a survey appearance of survey calcareous sand carbonate content. The test part comprises a support frame, a spray head and a sealed reaction container; the data collecting part comprises an electronic balance, a tray thereof, a capped liquid container and a measuring cylinder; the liquid container is sealed by a cover and filled with clear water and an oil layer. The utility model discloses instrument simple structure can be through on the basis of survey carbonate content through the quality difference, receives the survey through the drainage and produces CO₂And (4) content, further determining the carbonate content, and improving the result precision.

Description

Determinator for determining carbonate content of calcareous sand

Technical Field

The utility model belongs to geotechnical engineering test field, concretely relates to apparatus of survey calcareous sand carbonate content.

Background

The calcareous sand generally refers to special rock-soil media which are rich in calcium carbonate or other insoluble carbonate substances and are caused by marine organisms, and compared with common terrestrial sand, the calcareous sand has the characteristics of porosity, internal porosity, extremely irregular shape, easiness in crushing particles and the like. With the importance of China and other countries in the world on ocean resources and the requirement of ocean defense construction, the quantity and scale of modern island engineering are larger. The carbonate content of the calcareous sand is a main index for distinguishing common quartz sand, and the amount of the carbonate content has a certain influence on the mechanical property of the calcareous sand. The method for measuring the carbonate content of the calcareous sand in the laboratory is mainly used for measuring the change of the quality of the calcareous sand by drying the calcareous sand after pickling, is very simple, but the quality of a test sample is damaged due to repeated pickling, so that the accuracy of a test result is influenced.

SUMMERY OF THE UTILITY MODEL

In order to be simpler, accurate survey calcareous sand carbonate content, the utility model provides a survey appearance of survey calcareous sand carbonate content. The utility model adopts the technical proposal that:

a tester for testing the carbonate content of calcareous sand is characterized by comprising a test part and a data collection part;

the test part comprises a support frame, a spray head and a sealed reaction container; the sprayer is arranged above the sealed reaction container, the container for containing the acid liquid is connected and fixed with the support frame and is positioned above the sealed reaction container, the container for containing the acid liquid is communicated with the sprayer in the sealed reaction container through the liquid guide pipe, and the liquid guide pipe is provided with a liquid guide pipe valve;

the data collection part comprises an electronic balance, a tray thereof, a capped liquid container and a measuring cylinder; the sealed reaction container is placed on the tray, the capped liquid container and the reaction container are communicated through the exhaust pipe, clear water and an oil layer are filled in the capped liquid container, the capped liquid container is connected with the measuring cylinder through the drain pipe, the inlet of the drain pipe is positioned in the water phase in the capped liquid container, and the exhaust port of the exhaust pipe is positioned above the surface oil layer in the capped liquid container;

the exhaust pipe and the drain pipe are respectively provided with an exhaust pipe valve and a drain pipe valve.

Furthermore, an electric micro-speed small motor is arranged in the spray head, and the spray head can rotate, so that the calcareous sand sample can be in full contact with hydrochloric acid, and the calcareous sand sample can be in full reaction.

Further, the solution filled in the cap-sealed liquid-filled container was first introduced into at least 1/2 container volumes of clear water and then poured into the oil layer.

Furthermore, the lower end position of the water outlet pipe and the liquid level of the oil layer in the capped sealed liquid container are positioned on the same horizontal plane.

Furthermore, the top cover of the reaction vessel is connected and sealed with the top flange plate through a plurality of bolts.

The utility model discloses calculate carbonate ion content principle as follows: according to the prior art, calcium carbonate is a main insoluble carbonate in calcareous sand, so when the carbonate content in the calcareous sand is measured, the calcium carbonate content is generally used as a standard. On one hand, the carbonate content of the calcareous sand is calculated according to the change of the reading of the balance; on the other hand, according to the production of CO₂The volume calculation obtains the content of carbonate in the calcareous sand: CO 2₃ ^2-+2H⁺→H₂O+CO₂×) ×; CO produced₂Measured by a gas-collecting and water-draining method using a volume measuring device according to CO₂The volume can give a fully reacted carbonate content. The utility model discloses utilize two kinds of different methods of electronic balance display and gas collection drainage device to record its calcareous sand carbonate content jointly.

The utility model discloses instrument simple structure can be through on the basis of survey carbonate content through the quality difference, receives the survey through the drainage and produces CO₂And (4) content, further determining the carbonate content, and improving the result precision.

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Drawings

FIG. 1 is a schematic view of the measuring instrument for measuring the carbonate content in the calcareous sand.

Fig. 2 is the flange of the experimental device of the present invention.

FIG. 3 is CO of an example method of the present invention₂Calibration curve of volume versus mass of carbonate ion.

In the figure, 1 support frame, 2 liquid container, 3 liquid guide tube, 4 spray head with built-in micro-motor, 5 reaction container, 6 tray, 7 electronic balance with display, 8 top cover of reaction container, 9 liquid container with cover, 10 gas exhaust tube, 11 water exhaust tube, 12 graduated cylinder, 13 flange, 14 bolt, 15 liquid guide tube valve, 16 gas exhaust tube valve and 17 water exhaust tube valve.

Detailed Description

As shown in figure 1: the utility model provides a survey appearance of survey calcareous sand carbonate content includes test section and data collection part.

The test part of the instrument comprises a support frame 1 (which can adopt a chemical experiment iron stand platform), a spray head 4 internally provided with a micro-electric motor and a sealed reaction container 5; the nozzle 4 is arranged above the inside of the sealed reaction vessel 5, the sealed reactor is sealed by connecting the reaction vessel top cover 8 and the flange 13 by bolts 14, and a sealing ring can be arranged correspondingly. The container 2 filled with dilute hydrochloric acid is connected and fixed with the support frame 1 through a plurality of bolts, and the lower end of the container 2 is communicated with the spray head 4 in the sealed reaction container 5 through the liquid guide pipe 3, so that the dilute hydrochloric acid can be sprayed to the spray head 4 through the liquid guide pipe 3 to further spray the test block in the sealed reaction container 5. A catheter valve 15 is provided on the catheter 3.

The data collection portion of the instrument includes: an electronic balance 7 and a tray 6 thereof, a capped liquid container 9 (a flask can be adopted), and a measuring cylinder 12. The content of carbonate radical is obtained by visually reflecting the numerical value of the mass change of the sample by an electronic balance 7 with a display, the other part is used for measuring the gas volume by a gas collection and drainage method, a capped and sealed liquid container 9 and a reaction container 5 are communicated by an exhaust pipe 10, and at least one part of the capped and sealed liquid container 9 is filled with1/2 container height clear water and oil layer, another volume measuring container is a measuring cylinder 12 with a scale, which is connected with the capped liquid container 9 through a drain pipe 11, the inlet of the drain pipe 11 is in the water phase in the capped liquid container 9, the exhaust port of the exhaust pipe 10 is above the surface oil layer in the capped liquid container 9, and finally the volume of water entering the measuring cylinder (water displacement) represents the CO generation₂The volume of (a).

An exhaust pipe valve 16 and a drain pipe valve 17 are provided in the exhaust pipe 10 and the drain pipe 11, respectively.

The specific test steps are as follows:

1) taking a calcareous sand sample, drying, and measuring the mass of the calcareous sand sample: 5-80 g.

2) Introducing a dilute hydrochloric acid solution with the volume of 50-800 ml and the concentration of 1.8mol/L into a liquid container 2 in FIG. 1; the mixing amount of the dilute hydrochloric acid solution and the ratio of the calcium sand sample are 10 ml: 1g of the total weight of the composition.

3) In the sealed liquid container 9 with the cover in FIG. 1, at least 1/2 container volumes of clear water are poured, and then an oil layer is poured; the top cover is covered and is connected with the measuring cylinder 12 by the exhaust pipe 10 and the drain pipe 11; the height position of the lower end of the right side water outlet of the water outlet pipe 11 is at the same level with the liquid level of the oil layer in the capped and sealed liquid container 9, and the water outlet pipe is filled with clear water.

4) Starting the test, opening each valve, then spraying dilute hydrochloric acid from the spray head 4 to fully react with the calcareous sand in the reaction container 5, firstly displaying the change of the mass of the dilute hydrochloric acid from the balance, recording the reading of the balance, and secondly reacting to generate CO₂Is discharged from an exhaust pipe 10 and enters a sealed liquid container 9, the internal pressure of the liquid container 9 changes, and clear water enters a drain pipe 11 under the action of pressure and flows into a measuring cylinder 12, so that CO generated by reaction is obtained₂Volume.

5) Calibrating CO₃ ^2-Content and CO₂Volume relationship: when the carbonate content of the calcareous sand is measured, the content of calcium carbonate is generally taken as a standard, so that 1g, 2g, 3g, 4g, 5g and 6g of calcium carbonate are respectively taken and are respectively used for measuring the CO generated by the calcium carbonate according to the instrument and a gas collection and drainage method₂Volume, drawingQuality of calcium carbonate and measured CO₂As shown in fig. 3.

6) Calculating the content of carbonate, on one hand, obtaining the mass change of the calcareous sand sample according to the change of the electronic balance value so as to calculate the content of calcium carbonate; on the other hand, according to the gas collection and drainage method, the drawn calcium carbonate quality and the measured CO₂The content of the carbonate in the calcareous sand sample is obtained according to the volume relation curve.

The utility model discloses the structure is simple, convenient operation easily shows the test result, adopts two kinds of methods of electronic balance direct reading and drainage to record calcareous sand carbonate content, improves the result precision.

Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art can change, add or replace the above examples within the scope of the present invention.

Claims

1. A tester for testing the carbonate content of calcareous sand is characterized by comprising a test part and a data collection part;

the test part comprises a support frame (1), a spray head (4) and a sealed reaction container (5); the spray head (4) is arranged above the inside of the sealed reaction container (5), the container (2) for containing the acid liquid is connected and fixed with the support frame (1) and is positioned above the sealed reaction container (5), the container (2) for containing the acid liquid is communicated with the spray head (4) in the sealed reaction container through a liquid guide pipe, and a liquid guide pipe valve is arranged on the liquid guide pipe;

the data collection part comprises an electronic balance (7) and a tray (6) thereof, a capped liquid container (9) and a measuring cylinder (12); the sealed reaction container (5) is placed on the tray, the capped sealed liquid container (9) and the sealed reaction container (5) are communicated through an exhaust pipe (10), clear water and an oil layer are filled in the capped sealed liquid container (9), the capped sealed liquid container (9) is connected with the measuring cylinder (12) through the drain pipe (11), an inlet of the drain pipe (11) is positioned in a water phase in the capped sealed liquid container (9), and an exhaust port of the exhaust pipe (10) is positioned above a surface oil layer in the capped sealed liquid container (9);

an exhaust pipe valve (16) and a drain pipe valve (17) are respectively arranged on the exhaust pipe (10) and the drain pipe (11).

2. The apparatus for measuring the carbonate content of the calcareous sand according to claim 1, wherein an electric low-speed motor is arranged in the spray head (4), and the spray head can rotate to enable the calcareous sand sample to fully contact hydrochloric acid so as to fully react.

3. The apparatus for determining the carbonate content of calcareous sand according to claim 1, wherein the solution filled in the liquid container (9) sealed with a cover is introduced into at least 1/2 container volumes of clean water and then poured into the oil layer.

4. The apparatus for measuring the carbonate content in calcareous sand according to claim 1, wherein the lower end of the drain outlet of the drain pipe (11) is positioned on the same horizontal plane with the liquid level of the oil layer in the capped liquid container (9).

5. The apparatus for determining the carbonate content in calcareous sand according to claim 1, wherein the top cover (8) of the sealed reaction vessel is connected and sealed with the top flange (13) through a plurality of bolts (14).