Electric stirring chloride ion titration cell device

Abstract

The utility model discloses an electric stirring chloride ion titration cell device, and belongs to the technical field of electrochemical instrument analysis. Comprising a central chamber (1), a cathode side arm (2), a reference side arm (3), a tank cover (4), an electrolytic cathode (5), an electrolytic anode (6), an indicator electrode (7), a reference electrode (8), a reference chamber (9), a stirring motor (10), a stirring paddle (11), a threaded piece (12), a first glass tube (13), a second glass tube (14), a first sand core (15), a second sand core (16) and a third sand core (17), the stirring motor (10) is fixedly connected with the stirring paddle (11) through the threaded piece (12), and the other parts are connected through frosted or glass tubes. The electric stirring device disclosed by the utility model has the beneficial effects that the electric stirring can avoid the condition that the electrode is abraded or the magneton is clamped in a dead angle of a titration cell and the like caused by collision between the magneton and the electrode during magnetic stirring in the past, and the electric stirring can ensure that the stirring speed is more controllable and more stable, so that the analysis efficiency of an instrument is improved.

Description

Technical Field

[0001] The utility model relates to an electrically stirred chloride ion titration cell device, belonging to the technical field of electrochemical instrument analysis. Background Art

[0002] Waste lubricating oil contains a large amount of polycyclic aromatic hydrocarbons and organic sulfur, organic chlorine, organic nitrogen and other compounds. If it is directly discharged without regeneration treatment, it will seriously pollute the water and soil and endanger the living environment of humans, animals and plants.

[0003] The regeneration of waste lubricating oil includes the steps of heavy metal removal, hydrogenation removal of organic sulfur, chlorine, nitrogen compounds and inorganic chlorine compounds, and then the regenerated and refined waste lubricating oil is separated from the acidic wastewater through a cold high-pressure separator. Acidic wastewater will corrode equipment and pipelines and needs to be further treated in a sewage treatment plant. In order to ensure that the treated wastewater meets the discharge requirements, the chloride ion content in the wastewater needs to be tested.

[0004] Microcoulometric analysis is one of the most commonly used methods for determining chloride ion content. The core component of this method is the chloride ion titration cell. Two pairs of electrodes, indicator electrode-reference electrode and electrolytic anode-electrolytic cathode, are inserted into the titration cell. During the measurement, the sample is injected into the titration cell with a syringe. The chloride ions in the sample react with the silver ions in the electrolyte to generate silver chloride, causing the silver ion concentration in the electrolyte to change. The indicator electrode-reference electrode indicates this change, and then the change signal is amplified by an amplifier, and the amplified signal is added to the electrolytic electrode. The electrolytic anode electrolyzes silver ions to supplement the part titrated by the sample until the silver ion concentration in the electrolyte returns to the original level. The amount of electricity consumed in the electrolysis process can be calculated using Faraday's law to determine the chloride ion content in the sample.

[0005] In order to ensure that the entire titration-electrolysis reaction process in the titration cell is carried out quickly and evenly, the electrolyte needs to be stirred continuously during the measurement. The common chloride ion titration cell uses a magnetic stirrer to complete this operation. However, after actual use, it was found that magnetic stirring has problems such as unstable stirring rate, easy collision of the magnet with the electrode or stuck in the dead corner of the titration cell and difficult to rotate normally, resulting in unreliable measurement results. Therefore, the utility model improves the device for stirring operation and develops a chloride ion titration cell device with electric stirring. Summary of the invention

[0006] The utility model aims to provide an electric stirring chloride ion titration cell device with easy-to-control stirring operation and more stable stirring rate.

[0007] In order to achieve the above purpose, the technical solution of the utility model is:

[0008] A chloride ion titration cell device with electric stirring, comprising a central chamber 1, a cathode side arm 2, a reference side arm 3, a cell cover 4, an electrolytic cathode 5, an electrolytic anode 6, an indicator electrode 7, a reference electrode 8, a reference chamber 9, a stirring motor 10, a stirring paddle 11, a threaded member 12, a No. 1 glass tube 13, a No. 2 glass tube 14, a No. 1 sand core 15, a No. 2 sand core 16, and a No. 3 sand core 17. The cell cover 4 is provided with a stirring paddle port 401, an injection port 402, an electrolytic anode interface 403, and an indicator electrode interface 404; the cell cover 4 and the central chamber 1, the electrolytic cathode 5 and the cathode side arm 2, the electrolytic anode 6 The electrolysis anode interface 403 and the pool cover 4, the indicator electrode 7 and the pool cover 4 through the indicator electrode interface 404, the reference electrode 8 and the reference chamber 9, and the reference chamber 9 and the reference chamber side arm 3 are all connected and sealed with frosted metal; the stirring paddle 11 passes through the stirring paddle opening 401 on the pool cover 4, and is connected and fixed to the stirring motor 10 by a threaded part 12; the central chamber 1 is connected to the cathode side arm 2 through a No. 1 glass tube 13, and a No. 1 sand core 15 is provided at the connection; the central chamber 1 is connected to the reference side arm 3 through a No. 2 glass tube 14, and a No. 2 sand core 16 is provided at the connection; a No. 3 sand core 17 is provided at the bottom of the reference chamber 9.

[0009] Furthermore, the stirring paddle port 401 is located at the center of the pool cover 4 , and the sample inlet 402 is located at the central axis of the pool cover 4 and directly in front of the stirring paddle port 401 .

[0010] The beneficial effects of the utility model are: 1. The electrolyte is stirred by a stirring paddle 11 connected and fixed by a stirring motor 10 and a threaded part 12, thereby avoiding the wear of the electrode caused by the collision between the magnet and the electrode during previous magnetic stirring; 2. Compared with previous magnetic stirring, the stirring motor 10 can make the stirring rate more controllable and more stable, thereby improving the analysis efficiency of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] Figure 2 It is a top view of the pool cover 4.

[0013] Figure 1 In the figure, 1 is a central chamber, 2 is a cathode side arm, 3 is a reference side arm, 4 is a cell cover, 5 is an electrolytic cathode, 6 is an electrolytic anode, 7 is an indicator electrode, 8 is a reference electrode, 9 is a reference chamber, 10 is a stirring motor, 11 is a stirring paddle, 12 is a threaded part, 13 is a No. 1 glass tube, 14 is a No. 2 glass tube, 15 is a No. 1 sand core, 16 is a No. 2 sand core, and 17 is a No. 3 sand core; Figure 2 In the figure, 401 is a stirring paddle port, 402 is a sample injection port, 403 is an electrolysis anode interface, and 404 is an indicator electrode interface. DETAILED DESCRIPTION

[0014] The following will describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention. Example 1

[0015] Reference Figure 1 and Figure 2 Making the utility model. A chloride ion titration cell device with electric stirring, wherein the central chamber 1, cathode side arm 2, and reference side arm 3 are all glass containers, and the volumes are 80mL, 8mL, and 8mL respectively. 60mL, 6mL, and 5mL of acetic acid electrolyte containing a constant silver ion concentration of 70% by volume are poured into the central chamber 1, the cathode side arm 2, and the reference side arm 3 respectively. The central chamber 1 is connected to the cathode side arm 2 through a No. 1 glass tube 13, and a No. 1 sand core 15 is provided at the connection; the central chamber 1 is connected to the reference side arm 3 through a No. 2 glass tube 14, and a No. 2 sand core 16 is provided at the connection; and a No. 3 sand core 17 is provided at the bottom of the reference chamber 9. Each sand core plays a role in filtering impurities and ensuring the purity of the electrolyte. The stirring paddle 11 is made of polytetrafluoroethylene, has a rotating diameter of 20 mm, and a rod length of 170 mm. It is placed in the central chamber 1 and covered with the pool cover 4, so that the stirring paddle 11 passes through the stirring paddle port 401, and then the stirring paddle 11 and the stirring motor 10 are connected and fixed with the screw 12, so that the paddle of the stirring paddle 11 is located 10 mm above the bottom of the pool cup. The electrolytic cathode 5 is made of Pt, the electrolytic anode 6 is made of Ag, the indicator electrode 7 is made of Ag, and the reference electrode 8 is made of Ag / AgCl; the reference chamber 9 is filled with paste AgCl. The electrolytic anode 6 is connected to the pool cover 4 through the electrolytic anode interface 403, and the indicator electrode 7 is connected to the pool cover 4 through the indicator electrode interface 404; at the same time, the electrolytic cathode 5 is connected to the cathode side arm 2, the reference electrode 8 is connected to the reference chamber 9, and the reference chamber 9 is connected to the reference side arm 3. Connect each electrode to the main unit of the microcoulometric chlorine analyzer with a wire, start the stirring motor 10 and each component of the analyzer, set and adjust the stirring rate and end point voltage of the stirring motor 10, wherein the stirring rate can be adjusted to the corresponding optimal value according to different samples. After stable operation, inject the sample from the injection port 402 to analyze the chloride ion content of the sample.

[0016] The above is only an implementation method of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. An electrically stirred chloride ion titration cell device, characterized in that: The invention comprises a central chamber (1), a cathode side arm (2), a reference side arm (3), a cell cover (4), an electrolytic cathode (5), an electrolytic anode (6), an indicator electrode (7), a reference electrode (8), a reference chamber (9), a stirring motor (10), a stirring paddle (11), a threaded member (12), a No. 1 glass tube (13), a No. 2 glass tube (14), a No. 1 sand core (15), a No. 2 sand core (16), and a No. 3 sand core (17). The cell cover (4) is provided with a stirring paddle port (401), an injection port (402), an electrolytic anode interface (403), and an indicator electrode interface (404). The cell cover (4) is connected to the central chamber (1), the electrolytic cathode (5) is connected to the cathode side arm (2), and the electrolytic anode (6) is connected to the electrode through an electric The anode interface (403) is connected to the pool cover (4), the indicator electrode (7) is connected to the pool cover (4) through the indicator electrode interface (404), the reference electrode (8) is connected to the reference chamber (9), and the reference chamber (9) is connected to the reference side arm (3); the stirring paddle (11) passes through the stirring paddle opening (401) on the pool cover (4) and is connected and fixed to the stirring motor (10) through a threaded member (12); the central chamber (1) is connected to the cathode side arm (2) through a No. 1 glass tube (13), and a No. 1 sand core (15) is provided at the connection; the central chamber (1) is connected to the reference side arm (3) through a No. 2 glass tube (14), and a No. 2 sand core (16) is provided at the connection; and a No. 3 sand core (17) is provided at the bottom of the reference chamber (9).

2. The electrically stirred chloride ion titration cell device according to claim 1, characterized in that: The stirring paddle opening (401) is located at the exact center of the pool cover (4), and the sample inlet (402) is located on the central axis of the pool cover (4) and exactly in front of the stirring paddle opening (401).

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