Continuous extraction tower experimental device

Abstract

The utility model relates to the technical field of laboratory devices, in particular to a continuous extraction tower experimental device which comprises an extraction tower, a raw material liquid storage tank, an extraction agent storage tank and a raffinate storage tank. The raw material liquid storage tank is communicated with the bottom of the extraction tower, and the extraction agent storage tank is communicated with the top of the extraction tower; an extraction phase outflow pipe is arranged at the bottom of the extraction tower, a raffinate phase outflow pipe is arranged at the top of the extraction tower, and the raffinate phase outflow pipe is connected with a raffinate phase storage tank; the raw material liquid storage tank is communicated with the first balance pipe, the raffinate storage tank is communicated with the second balance pipe, the extraction agent storage tank is communicated with the third balance pipe, and the first balance pipe, the second balance pipe and the third balance pipe are communicated with one another; a solute adding pipe is arranged on the raw material liquid storage tank, a Y-shaped filter is arranged on the raw material liquid flowing pipe, and the Y-shaped filter is located at the front end of the raw material liquid conveying pump. By balancing the pressure and filtering the raw material liquid, the continuous and stable extraction experiment can be realized, and the device is more convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to laboratory device technical field, concretely relates to a continuous extraction column experimental device. BACKGROUND

[0002] Extraction is a post-processing means in chemical experiment, is also the basic experimental skill that student must master, therefore, in the process of experimental teaching, often through the corresponding extraction experimental device to the extraction process is simulated, thereby reaches the purpose of experimental teaching, extraction includes intermittent extraction and continuous extraction, each has the application in actual production, among them, continuous extraction can realize the continuous extraction process, thereby make the production process continuous and stable, to improve the production efficiency has played the active role.

[0003] In the process of experimental teaching to continuous extraction, need to use continuous extraction experimental teaching device, such as China utility model CN207614404U, carousel type extraction column experimental device, but in practice, it is found that each liquid storage tank in the experimental device needs to keep the state of open, because the organic solvent volatilizes in the experimental process, on the one hand, affect the laboratory environment, on the other hand, also affect the health of students, bring inconvenience to experimental teaching operation.

[0004] At the same time, in the process of experimental exploration, it is found that because the solute in the raw material liquid is directly added to the raw material liquid storage tank, the solute often does not dissolve completely, the undissolved solute enters the pump body at the rear end, which is easy to cause the blockage and damage of the pump body, and is not convenient for the stable connection of experimental operation, therefore, an experimental device capable of effectively avoiding easy volatilization pollution and ensuring continuous and stable operation of the experimental device is a technical problem to be solved. UTILITY MODEL CONTENTS

[0005] The utility model aims at the deficiency of prior art, provides a continuous extraction column experimental device, to reach the purpose that experimental device can continuous and stable operation.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme: a continuous extraction column experimental device, including extraction tower, the bottom of extraction tower is connected with raw material liquid flow pipe and extraction phase outflow pipe, the top of extraction tower is connected with extractant flow pipe and raffinate phase outflow pipe, the raw material liquid flow pipe is connected with raw material liquid storage tank, the extractant flow pipe is connected with extractant storage tank, the raffinate phase outflow pipe is connected with raffinate phase storage tank, the raw material liquid storage tank, extractant storage tank and raffinate phase storage tank are all closed settings, the top of raw material liquid storage tank is connected with first balance pipe, the top of raffinate phase storage tank is connected with second balance pipe, the top of extractant storage tank is connected with third balance pipe, first balance pipe, second balance pipe and third balance pipe are interconnected.

[0007] Furthermore, a raw material delivery pump is installed on the raw material flow pipe, a raw material flow meter is installed behind the raw material delivery pump, a raw material sampling pipe is installed on the raw material flow pipe, and the raw material flow pipe extends into the interior of the extraction tower.

[0008] Furthermore, a raw material return pipe is provided on the raw material flow pipe. The raw material return pipe is located at the front end of the raw material flow meter and is connected to the top of the raw material storage tank.

[0009] Furthermore, a solute addition pipe is provided above the raw material liquid storage tank, the bottom of the solute addition pipe extends into the raw material liquid storage tank, a sieve hole is provided at the bottom of the solute addition pipe, and the top of the solute addition pipe is connected to the raw material liquid return pipe.

[0010] Furthermore, a Y-type filter is installed on the raw material liquid flow pipe, and the Y-type filter is located in front of the raw material liquid delivery pump.

[0011] Furthermore, an extractant delivery pump is installed on the extractant flow pipe, and an extractant flow meter is installed behind the extractant delivery pump. The extractant flow pipe extends into the interior of the extraction tower.

[0012] Furthermore, an extraction phase sampling tube is provided on the extraction phase effluent tube.

[0013] Furthermore, a raffinate sampling tube is provided on the raffinate effluent tube.

[0014] Furthermore, the bottom of the raffinate storage tank is connected to the top of the feed liquid storage tank.

[0015] Furthermore, drain pipes are provided at the bottom of the raw material flow pipe, the extractant flow pipe, and the extract phase outlet pipe.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model can achieve pressure balance in the raw material liquid storage tank, raffinate storage tank and extractant storage tank through the air pressure balance pipe. On the one hand, it can effectively avoid environmental pollution caused by solvent evaporation, and on the other hand, it can make the experimental operation continuous and stable.

[0018] 2. By setting up a solute addition tube and a Y-type filter, this utility model facilitates the dissolution of the solute and prevents undissolved solute from entering the pump body and causing damage to the pump body. This helps the experimental device to operate continuously and stably and plays a positive and beneficial role in experimental operations. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 The utility model Figure 1 Part of the local amplification schematic view of A part in the middle.

[0021] The name corresponding to each mark in the figure:

[0022] 1, extraction column; 11, tower body; 111, fixed ring; 12, motor; 13, rotating shaft; 131, rotating disc; 14, first extraction phase flow pipe; 15, extraction phase discharge pipe; 151, extraction phase discharge valve; 16, second extraction phase flow pipe; 161, extraction phase flow valve; 17, extraction phase sampling pipe; 171, extraction phase sampling valve; 18, raffinate phase flow pipe; 19, raffinate phase sampling pipe; 191, raffinate phase sampling valve; 2, raw material liquid storage tank; 21, first raw material liquid flow pipe; 211, Y type filter; 22, first raw material liquid discharge pipe; 221, first raw material liquid discharge valve; 23, second raw material liquid flow pipe; 24, raw material liquid sampling pipe; 241, raw material liquid sampling valve; 25, raw material liquid return pipe; 251, raw material liquid return valve; 26, third raw material liquid flow pipe; 27, second raw material liquid discharge pipe; 271, second raw material liquid discharge valve; 28, solute adding pipe; 281, screen hole; 3, extractant storage tank; 31, first extractant flow pipe; 32, extractant discharge pipe; 321, extractant discharge valve; 33, second extractant flow pipe; 34, third extractant flow pipe; 4, raffinate phase storage tank; 41, raffinate phase return pipe; 411, raffinate phase return valve; 5, raw material liquid delivery pump; 6, raw material liquid flow meter; 7, extractant delivery pump; 8, extractant flow meter; 9, air pressure balance pipe; 91, first balance pipe; 92, second balance pipe; 93, third balance pipe. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art belong to the protection scope of the utility model.

[0024] Embodiments of the utility model:

[0025] As Figures 1-2 shown, in the embodiment, the extraction column 1 is arranged, the extraction column 1 includes the tower body 11, the fixed ring 111 is uniformly arranged from top to bottom in the inside periphery of the tower body 11, the motor 12 is arranged at the top of the tower body 11, the motor 12 is drivingly connected with the rotating shaft 13, the rotating disc 131 is uniformly arranged from top to bottom on the rotating shaft 13, the rotating disc 131 is staggered with the fixed ring 111, the blank section is arranged at the upper and lower ends of the fixed ring 111.

[0026] In this embodiment, a raw material liquid storage tank 2 is provided, a first raw material liquid flow pipe 21 is provided at the bottom of the raw material liquid storage tank 2, a Y-type filter 211 is installed on the first raw material liquid flow pipe 21, the first raw material liquid flow pipe 21 is connected with a raw material liquid delivery pump 5, and a first raw material liquid discharge pipe 22 is provided below the first raw material liquid flow pipe 21, a first raw material liquid discharge valve 221 is installed on the first raw material liquid discharge pipe 22; the raw material liquid delivery pump 5 is connected with a second raw material liquid flow pipe 23, a raw material liquid sampling pipe 24 is provided on the second raw material liquid flow pipe 23, and a raw material liquid sampling valve 241 is installed on the raw material liquid sampling pipe 24; the second raw material liquid flow pipe 23 is connected with a raw material liquid flow meter 6, the raw material liquid flow meter 6 is connected with a third raw material liquid flow pipe 26, the third raw material liquid flow pipe 26 is connected with the bottom of the extraction tower 1 and extends into the interior of the extraction tower 1, a second raw material liquid discharge pipe 27 is provided at the bottom of the third raw material liquid flow pipe 26, and a second raw material liquid discharge valve 271 is installed on the second raw material liquid discharge pipe 27.

[0027] In this embodiment, the second raw material liquid flow pipe 23 is connected with a raw material liquid return pipe 25, the raw material liquid return pipe 25 is located at the front end of the raw material liquid flow meter 6, and a raw material liquid return valve 251 is installed on the raw material liquid return pipe 25; a solute adding pipe 28 is provided on the raw material liquid storage tank 2, sieve holes 281 are provided at the bottom of the solute adding pipe 28, and the upper portion of the solute adding pipe 28 is connected with the raw material liquid return pipe 25.

[0028] In this embodiment, an extractant storage tank 3 is provided, a first extractant flow pipe 31 is provided at the bottom of the extractant storage tank 3, the first extractant flow pipe 31 is connected with an extractant delivery pump 7, an extractant discharge pipe 32 is provided at the bottom of the first extractant flow pipe 31, and an extractant discharge valve 321 is installed on the extractant discharge pipe 32; the extractant delivery pump 7 is connected with a second extractant flow pipe 33, the second extractant flow pipe 33 is connected with an extractant flow meter 8, the extractant flow meter 8 is connected with a third extractant flow pipe 34, and the third extractant flow pipe 34 is connected with the top of the extraction tower 1 and extends into the interior of the extraction tower 1.

[0029] In this embodiment, a first extractant phase outflow pipe 14 is provided at the bottom of the extraction tower 1, the first extractant phase outflow pipe 14 is connected with a second extractant phase outflow pipe 16, the first extractant phase outflow pipe 14 is connected with an extractant phase discharge pipe 15 at the bottom, and an extractant phase discharge valve 151 is installed on the extractant phase discharge pipe 15; an extractant phase sampling pipe 17 is provided above the second extractant phase outflow pipe 16, an extractant phase sampling valve 171 is installed on the extractant phase sampling pipe 17, and an extractant phase outflow valve 161 is installed at the end of the second extractant phase outflow pipe 16.

[0030] The top of the extraction column 1 in the embodiment is provided with a raffinate phase outflow pipe 18 connected with a raffinate phase storage tank 4, and a raffinate phase sampling pipe 19 is arranged on the raffinate phase outflow pipe 18, and a raffinate phase sampling valve 191 is installed on the raffinate phase sampling pipe 19; a raffinate phase reflux pipe 41 is arranged at the bottom of the raffinate phase storage tank 4, and a raffinate phase reflux valve 411 is installed on the raffinate phase reflux pipe 41.

[0031] In the embodiment, a gas pressure balance pipe 9 is further arranged, which comprises a first balance pipe 91, a second balance pipe 92 and a third balance pipe 93, the first balance pipe 91 is communicated with the raw material liquid storage tank 2, the second balance pipe 92 is communicated with the raffinate phase storage tank 4, and the third balance pipe 93 is communicated with the extractant storage tank 3; the first balance pipe 91, the second balance pipe 92 and the third balance pipe 93 are communicated with each other.

[0032] The principle of the utility model is:

[0033] In use, the raw material liquid is pumped into the extraction column 1 through the raw material liquid storage tank 2, and the extractant is pumped into the extraction column 1 through the extractant storage tank 3; in an embodiment of the utility model, the raw material liquid is benzoic acid-kerosene, wherein benzoic acid is the solute and kerosene is the solvent; the extractant is water; the raw material liquid and the extractant exchange the solute in the extraction column 1, and the fixed ring 111 and the rotating disc 131 make the raw material liquid and the extractant fully mix.

[0034] In the continuous conveying process of the raw material liquid and the extractant, the extractant phase, i.e. the water phase, sinks, and the raffinate phase, i.e. the kerosene phase, floats, so that an oil-water layered interface is formed in the extraction column 1; in the experimental operation process, the flow rates of the raw material liquid and the extractant are controlled, and the opening degree of the extractant phase outflow valve 161 is controlled, so that the oil-water layered interface is located in the blank section above the fixed ring 111 of the extraction column 1; in the continuous extraction process, the extractant phase flows out from the first extractant phase outflow pipe 14 and the second extractant phase outflow pipe 16 at the bottom, and the raffinate phase flows out through the raffinate phase outflow pipe 18 at the top.

[0035] In the experimental operation process, the raw material liquid is sampled through the raw material liquid sampling pipe 24, the extractant phase is sampled through the extractant phase sampling pipe 17, and the raffinate phase is sampled through the raffinate phase sampling pipe 19; by measuring the solute in the sampled product, the influence of different conditions, such as stirring intensity, raw material liquid-extractant ratio and solute mass fraction in the raw material liquid, on extraction can be explored, so that the purpose of experimental teaching is achieved.

[0036] In the utility model, the solute is added through the solute adding pipe 28 (the cover of the solute adding pipe 28 is taken off, the cover is well reconnected after adding is completed, and sealing is kept), thereby avoiding that the solute is incompletely dissolved and deposited at the bottom of the raw material liquid storage tank 2 and is pumped to the raw material liquid delivery pump 5, the pump body is influenced, and the Y-shaped filter 211 on the first raw material liquid flow pipe 21 is passed through, further realizing the removal of the incompletely dissolved solute and impurities; the raw material liquid return pipe 25 can return a certain amount of raw material liquid, avoids that the raw material liquid flowmeter 6 is caused greater pressure load, on the other hand, it is connected with the solute adding pipe, also helps the dissolution of the solute (it is needed to note that in the early stage of experiment, after the solute is completely dissolved, the experimental data are determined).

[0037] In the utility model, in order to avoid environmental pollution caused by volatilization of raw material liquid solvent, each tank is closed during experimental operation, wherein the liquid in the raw material liquid storage tank 2 and the extractant storage tank 3 decreases, the pressure in the tank body shows a decreasing trend; and the liquid in the raffinate phase storage tank 4 gradually increases, the pressure in the tank body shows a continuously increasing trend, so that the stable and continuous operation of the experiment is affected, the gas pressure is balanced through the gas pressure balance pipe 9, and the continuous and stable operation of the experimental operation is ensured.

[0038] In the utility model, after experimental operation is completed, the liquid in the pipeline needs to be emptied, and the emptying is carried out through the first raw material liquid discharge pipe 22, the second raw material liquid discharge pipe 27, the extractant discharge pipe 32 and the extraction phase discharge pipe 15; the third raw material liquid flow pipe 26 extends to the inside of the extraction tower 1, and disturbance to the extraction phase at the bottom of the extraction tower 1 is avoided.

[0039] In the utility model, the raffinate phase in the raffinate phase storage tank 4 can be recycled, and the raffinate phase return pipe 41 at the bottom of the raffinate phase storage tank 4 is used for returning, and a certain amount of solute is added after returning, so that the solute can be recycled.

[0040] In the utility model, the connection of each pipeline and the storage tank, the solute adding pipe and the like can adopt butt joints and the like, and since it is a standard part, it is not difficult for those skilled in the art to understand, and will not be repeated.

Claims

1. A continuous extraction column experimental device comprising an extraction column (1), the bottom of which is connected to a feed stream inlet pipe and to an extract phase outlet pipe, the top of which is connected to an extractant stream inlet pipe and to a raffinate phase outlet pipe (18), characterised in that: The raw material liquid flow pipe is connected with a raw material liquid storage tank (2), the extractant flow pipe is connected with an extractant storage tank (3), and the raffinate phase outlet pipe (18) is connected with a raffinate phase storage tank (4); the raw material liquid storage tank (2), the extractant storage tank (3) and the raffinate phase storage tank (4) are all arranged in a sealed mode, the upper portion of the raw material liquid storage tank (2) is connected with a first balance pipe (91), the upper portion of the raffinate phase storage tank (4) is connected with a second balance pipe (92), and the upper portion of the extractant storage tank (3) is connected with a third balance pipe (93); the first balance pipe (91), the second balance pipe (92) and the third balance pipe (93) are connected with each other.

2. The continuous extraction column experimental apparatus according to claim 1, characterized in that: A raw material liquid delivery pump (5) is arranged on the raw material liquid flow pipe, a raw material liquid flow meter (6) is arranged behind the raw material liquid delivery pump (5), a raw material liquid sampling pipe (24) is arranged on the raw material liquid flow pipe, and the raw material liquid flow pipe extends into the inside of the extraction tower (1).

3. The continuous extraction column experimental apparatus according to claim 2, characterized in that: A raw material liquid return pipe (25) is arranged on the raw material liquid flow pipe, the raw material liquid return pipe (25) is arranged at the front end of the raw material liquid flow meter (6), and the raw material liquid return pipe (25) is connected with the upper portion of the raw material liquid storage tank (2).

4. The continuous extraction column experimental apparatus according to claim 3, characterized in that: A solute adding pipe (28) is arranged on the upper portion of the raw material liquid storage tank (2), the bottom portion of the solute adding pipe (28) extends into the raw material liquid storage tank (2), a sieve hole (281) is arranged on the bottom portion of the solute adding pipe (28), and the upper portion of the solute adding pipe (28) is connected with the raw material liquid return pipe (25).

5. The continuous extraction column experimental apparatus according to claim 4, characterized in that: A Y-shaped filter (211) is arranged on the raw material liquid flow pipe, and the Y-shaped filter (211) is arranged in front of the raw material liquid delivery pump (5).

6. The continuous extraction column experimental apparatus according to claim 1, characterized in that: An extractant delivery pump (7) is arranged on the extractant flow pipe, an extractant flow meter (8) is arranged behind the extractant delivery pump (7), and the extractant flow pipe extends into the inside of the extraction tower (1).

7. The continuous extraction column experimental apparatus according to claim 1, characterized in that: An extraction phase sampling pipe (17) is arranged on the extraction phase outlet pipe.

8. The continuous extraction column experimental apparatus according to claim 1, characterized in that: A raffinate phase sampling pipe (19) is arranged on the raffinate phase outlet pipe (18).

9. The continuous extraction column experimental apparatus according to claim 1, characterized in that: The bottom portion of the raffinate phase storage tank (4) is connected with the upper portion of the raw material liquid storage tank (2).

10. The continuous extraction column experimental apparatus according to claim 1, characterized in that: The bottom portions of the raw material liquid flow pipe, the extractant flow pipe and the extraction phase outlet pipe are all provided with exhaust pipes.

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