Device for filter-pressing platinum-carbon catalyst particles and detecting chloride ion concentration in platinum-carbon catalyst particles

Abstract

The utility model discloses a device for carrying out filter pressing on platinum-carbon catalyst particles and detecting chloride ion concentration in the platinum-carbon catalyst particles, relates to a device for cleaning platinum-carbon catalysts and detecting ions, and aims to solve the technical problems that an existing platinum-carbon particle separation device is single in function and cannot meet the requirement of batch production. The device comprises a plurality of filter pressing tanks which are connected in series and have the same structure, wherein each filter pressing tank comprises a tank body, a stirrer, an air pipe, a porous ceramic supporting sheet, a discharge pipe, a chloride ion detection pipe, a communicating pipe and a turbidity detector; a stirrer, an air pipe and a porous ceramic supporting sheet are arranged in a tank body of the filter pressing tank, a discharge pipe and a communicating pipe are arranged at the bottom of the tank body, and the communicating pipe is connected in parallel with a chloride ion detection pipe connected with a turbidity detector. The device can be used for quickly carrying out solid / liquid separation and washing on the platinum-carbon catalyst on a large scale and detecting chloride ions in the platinum-carbon catalyst, is thorough in washing and low in water consumption, and can be applied to the field of platinum-carbon catalyst preparation.

Description

Technical Field

[0001] The utility model relates to a device for separating platinum-carbon catalyst particles prepared by an alcohol reduction method from a solvent and for testing the chloride ion concentration in a press filtrate. Background Art

[0002] Carbon-supported platinum (platinum-carbon) catalyst is a widely used hydrogen fuel cell catalyst at present. Microwave-alcohol reduction method is to disperse platinum ion solution in polyol solvent, and after microwave heating, platinum ion is reduced into platinum nanoparticles by alcohol, and then quantitative carbon powder is added to the mixed solution to uniformly adsorb platinum nanoparticles on carbon carrier to form carbon-supported platinum particles. Subsequent processing needs to separate platinum-carbon solid particles from the mixed solution, and clean the platinum-carbon particles to remove alcohol solvent. If chloroplatinic acid is used as platinum source, the solution after the reaction also contains a large amount of chloride ions, and the chloride ions in the platinum-carbon catalyst can greatly affect its catalytic performance, so the chloride ions must be cleaned as thoroughly as possible by washing, and for this reason, it is necessary to carry out multiple suction filtration separations to its solid and liquid, and simultaneously the chloride ion concentration in the filtrate is quickly tested. However, the existing post-processing device cannot complete the work of cleaning and chloride ion detection at the same time, and cannot meet the requirements of batch production. Utility Model Content

[0003] The utility model aims to solve the technical problem that the existing platinum-carbon particle separation device has a single function and cannot meet the requirements of mass production, and provides a device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein.

[0004] The utility model discloses a device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein, comprising a plurality of filter press tanks of the same structure connected in series, the filter press tanks comprising a tank body 1, an agitator 2, an air pipe 3, a porous ceramic support sheet 4, a discharge pipe 5, a chloride ion detection tube 6, a connecting pipe 7 and a turbidity detector 8;

[0005] The tank body 1 of the filter press tank is cylindrical, and an agitator 2 is arranged inside the tank body 1. The stirring motor 2-1 of the agitator 2 is connected to the stirring paddle 2-3 through the stirring shaft 2-2; the air pipe 3 is arranged outside the stirring shaft 2-2, and the axes of the stirring shaft 2-2, the air pipe 3 and the tank body 1 coincide; the upper end of the air pipe 3 is provided with an air inlet 3-1 and an air outlet 3-2, and an exhaust valve 3-3 is arranged at the front end of the air outlet 3-2;

[0006] A water inlet pipe 1-1 is arranged on the upper part of the tank body 1, and the water inlet pipe 1-1 extends into the interior of the tank body 1 and a spray head 1-1-1 is arranged at the end of the water inlet pipe 1-1; a discharge pipe 5 is connected to the bottom of the tank body 1, and a porous ceramic support sheet 4 is arranged at the bottom of the tank body 1 for supporting filter paper;

[0007] A liquid outlet valve 5-1 is provided at one end of the discharge pipe 5 close to the tank body 1, and a discharge valve 5-2 is installed at the end of the discharge pipe 5; a connecting pipe 7 is provided on the pipeline between the liquid outlet valve 5-1 and the discharge valve 5-2;

[0008] The chloride ion detection tube 6 is composed of a detection tube liquid inlet valve 6-1, a detection tube liquid outlet valve 6-2, a tube body 6-3, a liquid storage cup 6-4, a liquid adding valve 6-5, a detection valve 6-6 and a cleaning valve 6-7; the chloride ion detection tube 6 is connected in parallel to the connecting tube 7, wherein the lower side of the tube body 6-3 is connected to the connecting tube 7 through the detection tube liquid inlet valve 6-1, the upper side of the tube body 6-3 is connected to the connecting tube 7 through the detection tube liquid outlet valve 6-2, the upper side of the tube body 6-3 is connected to the liquid storage cup 6-4 through the liquid adding valve 6-5, the lower side of the tube body 6-3 is connected to the turbidity detector 8 through the detection valve 6-6, and a cleaning valve 6-7 is also provided below the tube body 6-3;

[0009] A connecting water pipe valve 7-1 is arranged in front of the connection point between the connecting pipe 7 and the chloride ion detection tube 6, and a second connecting water pipe valve 7-2 is arranged behind the connection point between the connecting pipe 7 and the chloride ion detection tube 6. The connecting pipe 7 is connected to the water inlet pipe 1-1 of the rear filter press tank through a quick connector.

[0010] Furthermore, a pressure gauge is provided on the upper part of the tank body 1, and the gauge pressure in the tank is not greater than 0.8 MPa;

[0011] Furthermore, the connection between the stirring shaft 2-2, the air pipe 3 and the tank body 1 is sealed with silicone rubber.

[0012] Furthermore, the gas outlet of the gas pipe 3 is lower than the liquid level in the tank. This arrangement not only produces a filter press effect, but also has the function of stirring the liquid material.

[0013] Furthermore, the tank body 1 is made of stainless steel to avoid introducing impurities into the catalyst.

[0014] Furthermore, the material of the stirring paddle 2-3 is polytetrafluoroethylene to avoid introducing impurities into the catalyst.

[0015] Furthermore, a bracket 9 is provided at the bottom of the tank body 1 of the filter press tank, and the bracket 9 supports the tank body 1 .

[0016] Furthermore, the number of filter press tanks is 2 to 4.

[0017] Furthermore, the turbidity detector 8 is also provided with a data processing and display device 8-1.

[0018] Furthermore, the stirrer 2 may be replaced by an ultrasonic stirrer or used together with the ultrasonic stirrer.

[0019] Furthermore, the tube body 6 - 3 of the chloride ion detection tube 6 is provided with scales so as to measure the amount of the AgNO 3 solution added according to the volume of the liquid in the tube body 6 - 3 .

[0020] The operation process of the device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein is as follows:

[0021] 1. Paste the filter paper on the porous ceramic support sheet 4 at the bottom of the tank body, wet it with water and make the filter paper fit;

[0022] 2. Injecting the platinum-carbon catalyst mixture after microwave reduction and carbon-loaded platinum into the tank body 1 in the first filter press tank through the water inlet pipe 1-1, and operating the first filter press tank;

[0023] 3. Close the water pipe valve 7-1, open the liquid outlet valve 5-1 and the discharge valve 5-2 on the discharge pipe 5; introduce argon, nitrogen or air into the tank body 1 through the air inlet 3-1 of the air pipe 3, control the air flow so that the air pressure in the tank body 1 slowly rises and stabilizes at 0.4-0.5MPa, and start filter pressing; the concentration of chloride ions in the first filter press is very high, and the filtrate flowing out of the discharge valve 5-2 is collected for wastewater treatment;

[0024] Fourth, close the liquid outlet valve 5-1 on the discharge pipe 5, inject a certain amount of deionized water into the tank body 1 through the water inlet pipe 1-1, turn on the stirrer 2, stir at a low speed of 80 to 100 rpm, and gradually increase the speed to 600 to 800 rpm to fully stir the solution and wash the platinum carbon particles;

[0025] 5. Open the liquid outlet valve 5-1 on the discharge pipe 5, the connecting water pipe valve 7-1 and the detection pipe liquid inlet valve 6-1; close the discharge valve 5-2, the detection pipe liquid outlet valve 6-2, the liquid adding valve 6-5, the detection valve 6-6 and the second connecting water pipe valve 7-2, and start the filter press;

[0026] 6. The filtrate enters from the bottom through the detection tube inlet valve 6-1 and fills the tube body 6-3; close the detection tube inlet valve 6-1, slowly open the detection valve 6-6 to adjust the volume of the filtrate in the tube body 6-3 to 10mL; open the liquid adding valve 6-5 to drip 2 drops (about 0.1ml) of 0.01mol / L AgNO3 solution in the storage cup 6-4 into the tube body 6-3, then open the detection valve 6-6, and the liquid in the tube body 6-3 flows into the turbidity detector 8 to detect the turbidity value; replace the AgNO3 solution in the storage cup 6-4 with deionized water, close the detection valve 6-6, open the cleaning valve 6-7, release the waste liquid in the tube body 6-3, and wash the tube body 6-3 with deionized water, so that the washing and detection work is completed once;

[0027] 7. If the turbidity value A≥200NTU is higher than the equipment display, collect the filtrate flowing out of the discharge valve 5-2 for wastewater treatment, and repeat the operations of steps 4, 5 and 6;

[0028] If the turbidity value A satisfies 200NTU<A<5NTU, the discharge valve 5-2 is closed, the connecting water pipe valve 7-1 and the second connecting water pipe valve 7-2 are opened, and the filtrate is introduced into the second filter press tank for washing the platinum carbon particles therein;

[0029] If the turbidity value A≤5NTU, the washing of the platinum carbon particles is completed, the liquid outlet valve 5-1 is closed, and the filter cake on the filter paper is taken out for further subsequent drying treatment;

[0030] 8. Change the serial number of the second filter press tank to the first, the serial number of the third filter press tank to the second, and so on; repeat steps 1 to 7 to complete the washing of the platinum carbon particles in each filter press tank.

[0031] The device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein of the utility model has the following advantages:

[0032] (1) Washing, filtration and chlorine content detection in the filtrate are integrated into one. On the premise that the washing effect meets the requirements, the amount of water is accurately controlled to avoid blind washing.

[0033] (2) The agitator avoids the poor washing effect caused by the transient contact between the washing solvent (water) and the particles. Through stirring, the solvent and the particles can fully contact, greatly improving the washing efficiency; at the same time, during stirring, some particles are suspended in the liquid, reducing the particles on the bottom filter paper, reducing the filtration resistance, and greatly speeding up the filtration speed. Agitator 2 can be replaced by an ultrasonic agitator or a superimposed ultrasonic agitator.

[0034] (3) Spraying: Spraying the mixed liquid while stirring or ultrasonicating can improve the washing efficiency.

[0035] (4) Multiple use of water: The filter presses are combined through a connecting pipe with a detection device, so that multiple washes can be performed with one water, saving water.

[0036] (5) Turbidity detection: The chloride ions in the filtrate react with silver nitrate to form white silver chloride precipitate, which increases the turbidity of the water. The chloride ion concentration in the filtrate can be determined based on this to ensure that the catalyst is fully washed and reduce the impact of chloride ions in the catalyst on its catalytic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic structural diagram of a device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein according to the utility model;

[0038] Figure 2It is a structural schematic diagram of the filter press tank;

[0039] Figure 3 It is a schematic diagram of the structure of the chloride ion detection tube 6;

[0040] Figure 4 It is a schematic diagram of the structure of the agitator 2 and the air pipe 3.

[0041] In the figure, 1 is the tank body, 1-1 is the water inlet pipe, 1-1-1 is the spray head, 2 is the stirrer, 2-1 is the stirring motor, 2-2 is the stirring shaft, 2-3 is the stirring paddle, 3 is the air pipe, 3-1 is the air inlet, 3-2 is the air outlet, 3-3 is the exhaust valve, 4 is the porous ceramic support plate, 5 is the discharge pipe, 5-1 is the liquid outlet valve, 5-2 is the discharge valve, 6 is the chloride ion detection tube, 6-1 is the detection tube liquid inlet valve, 6-2 is the detection tube liquid outlet valve, 6-3 is the tube body, 6-4 is the liquid storage cup, 6-5 is the liquid adding valve, 6-6 is the detection valve, 6-7 is the cleaning valve, 7 is the connecting pipe, 7-1 is the water pipe valve, 7-2 is the second water pipe valve, 8 is the turbidity detector, and 8-1 is the data processing and display instrument. DETAILED DESCRIPTION

[0042] The beneficial effects of the present invention are verified by the following examples.

[0043] Embodiment 1: The device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein in this embodiment is composed of four filter press tanks with the same structure connected in series, and the filter press tank is composed of a tank body 1, an agitator 2, an air pipe 3, a porous ceramic support plate 4, a discharge pipe 5, a chloride ion detection tube 6, a connecting pipe 7 and a turbidity detector 8;

[0044] The tank body 1 of the filter press tank is a cylindrical stainless steel tank, and a stirrer 2 is arranged inside the tank body 1. The stirrer 2 is a mechanical stirrer, and a stirring motor 2-1 of the stirrer 2 is connected to a polytetrafluoroethylene stirring paddle 2-3 through a stirring shaft 2-2; an air pipe 3 is arranged outside the stirring shaft 2-2, and the axes of the stirring shaft 2-2, the air pipe 3 and the tank body 1 coincide; an air inlet 3-1 and an air outlet 3-2 are arranged at the upper end of the air pipe 3, and an exhaust valve 3-3 is arranged at the front end of the air outlet 3-2;

[0045] A water inlet pipe 1-1 is arranged on the upper part of the tank body 1, and the water inlet pipe 1-1 extends into the interior of the tank body 1 and a spray head 1-1-1 is arranged at the end of the water inlet pipe 1-1; a discharge pipe 5 is connected to the bottom of the tank body 1, and a porous ceramic support sheet 4 is arranged at the bottom of the tank body 1 for supporting filter paper; a pressure gauge is also arranged on the upper part of the tank body 1;

[0046] A liquid outlet valve 5-1 is provided at one end of the discharge pipe 5 close to the tank body 1, and a discharge valve 5-2 is installed at the end of the discharge pipe 5; a connecting pipe 7 is provided on the pipeline between the liquid outlet valve 5-1 and the discharge valve 5-2;

[0047] The chloride ion detection tube 6 is composed of a detection tube liquid inlet valve 6-1, a detection tube liquid outlet valve 6-2, a tube body 6-3, a liquid storage cup 6-4, a liquid adding valve 6-5, a detection valve 6-6 and a cleaning valve 6-7; the chloride ion detection tube 6 is connected in parallel to the connecting tube 7, wherein the lower side of the tube body 6-3 is connected to the connecting tube 7 through the detection tube liquid inlet valve 6-1, the upper side of the tube body 6-3 is connected to the connecting tube 7 through the detection tube liquid outlet valve 6-2, the upper side of the tube body 6-3 is connected to the liquid storage cup 6-4 through the liquid adding valve 6-5, the lower side of the tube body 6-3 is connected to the turbidity detector 8 through the detection valve 6-6, and a cleaning valve 6-7 is also provided below the tube body 6-3; the tube body 6-3 is provided with a scale, and the turbidity detector 8 is provided with a data processing and display instrument 8-1;

[0048] A connecting water pipe valve 7-1 is arranged in front of the connection point between the connecting pipe 7 and the chloride ion detection tube 6, and a second connecting water pipe valve 7-2 is arranged behind the connection point between the connecting pipe 7 and the chloride ion detection tube 6. The connecting pipe 7 is connected to the water inlet pipe 1-1 of the rear filter press tank through a quick connector.

[0049] The platinum-carbon catalyst mixture was washed and tested using the device for filtering the platinum-carbon catalyst particles and testing the chloride ion concentration therein in Example 1. The specific operation is as follows:

[0050] 1. Paste the filter paper on the porous ceramic support sheet 4 at the bottom of the tank body, wet it with water and make the filter paper fit; then calibrate the turbidity detector 8 with 0NTU deionized water and 100NTU standard solution respectively, and the turbidity of the tested tap water is 7NTU;

[0051] 2. Injecting the platinum-carbon catalyst mixture after microwave reduction and carbon-loaded platinum into the tank body 1 in the first filter press tank through the water inlet pipe 1-1, and operating the first filter press tank;

[0052] 3. Close the water pipe valve 7-1, open the liquid outlet valve 5-1 and the discharge valve 5-2 on the discharge pipe 5; introduce argon, nitrogen or air into the tank body 1 through the air inlet 3-1 of the air pipe 3, control the air flow so that the air pressure in the tank body 1 slowly rises and stabilizes at 0.5MPa, and start the filter press; the concentration of chloride ions in the first filter press liquid is very high, and the filtrate flowing out of the discharge valve 5-2 is collected for wastewater treatment;

[0053] Fourth, close the liquid outlet valve 5-1 on the discharge pipe 5, inject a certain amount of deionized water into the tank body 1 through the water inlet pipe 1-1, turn on the stirrer 2, stir at a low speed of 90 rpm, and gradually increase the speed to 650 rpm to fully stir the solution and wash the platinum carbon particles;

[0054] 5. Open the liquid outlet valve 5-1 on the discharge pipe 5, the connecting water pipe valve 7-1 and the detection pipe liquid inlet valve 6-1; close the discharge valve 5-2, the detection pipe liquid outlet valve 6-2, the liquid adding valve 6-5, the detection valve 6-6 and the second connecting water pipe valve 7-2, and start the filter press;

[0055] 6. The filtrate enters from the bottom through the detection tube inlet valve 6-1 and fills the tube body 6-3; close the detection tube inlet valve 6-1, slowly open the detection valve 6-6 to adjust the volume of the filtrate in the tube body 6-3 to 10mL; open the liquid adding valve 6-5 to drip 2 drops (about 0.1ml) of 0.01mol / L AgNO3 solution in the storage cup 6-4 into the tube body 6-3, then open the detection valve 6-6, and the liquid in the tube body 6-3 flows into the turbidity detector 8 to detect the turbidity value; replace the AgNO3 solution in the storage cup 6-4 with deionized water, close the detection valve 6-6, open the cleaning valve 6-7, release the waste liquid in the tube body 6-3, and wash the tube body 6-3 with deionized water. At this point, one washing and detection work is completed;

[0056] 7. The turbidity value displayed by the turbidity detector 8 is 200 NTU (device display value). The filtrate flowing out of the discharge valve 5-2 is collected for wastewater treatment. The operations of steps 4, 5 and 6 are repeated to detect the turbidity value of the filtrate again.

[0057] The turbidity value displayed by the turbidity detector 8 is 120 NTU, the discharge valve 5-2 is closed, the connecting water pipe valve 7-1 and the second connecting water pipe valve 7-2 are opened, and the filtrate is introduced into the second filter press tank for washing the platinum carbon particles therein; and the operations of steps 4, 5 and 6 are repeated for the first filter press tank, and the turbidity value of the filtrate is detected again;

[0058] The turbidity value displayed by the turbidity detector 8 is 34.5 NTU, the discharge valve 5-2 is closed, the connecting water pipe valve 7-1 and the second connecting water pipe valve 7-2 are opened, and the filtrate is introduced into the second filter press tank for washing the platinum carbon particles therein; and the operations of steps 4, 5 and 6 are repeated for the first filter press tank, and the turbidity value of the filtrate is detected again;

[0059] The turbidity value displayed by the turbidity detector 8 is 4.8 NTU, which means that the washing of the platinum carbon particles is completed, the liquid outlet valve 5-1 is closed, and the filter cake on the filter paper is taken out for further subsequent drying treatment;

[0060] 8. Change the serial number of the second filter press tank to the first, the serial number of the third filter press tank to the second, and the serial number of the fourth filter press tank to the third, and repeat steps one to seven to complete the washing of the platinum carbon particles in each filter press tank.

[0061] The device of the utility model is a filter press device that can quickly stir, wash, and separate solid catalyst particles in a solution in batches. Individual filter press tanks are combined, and the chloride ion concentration in the filtrate is detected through a chloride ion detection tube 6 to achieve the purpose of solid-liquid separation, washing, and detection in the preparation process of the platinum-carbon catalyst. In this device system, water can be used multiple times, and the chloride ion concentration of the filtrate of the previous filter press tank is detected. The filtrate that meets the requirements can be used in the washing process of the next filter press tank to achieve the purpose of water saving. The utility model has a filter press device for batch solid-liquid separation, automatic solid particle washing function, and automatic detection of chloride ion concentration, which can greatly speed up the preparation process of the platinum-carbon catalyst.

Claims

1. A device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein, characterized in that The device comprises a plurality of filter press tanks of the same structure connected in series, wherein the filter press tank comprises a tank body (1), an agitator (2), an air pipe (3), a porous ceramic support sheet (4), a discharge pipe (5), a chloride ion detection tube (6), a connecting pipe (7) and a turbidity detector (8); The tank body (1) of the filter press tank is cylindrical, and a stirrer (2) is arranged inside the tank body (1), and a stirring motor (2-1) of the stirrer (2) is connected to a stirring paddle (2-3) via a stirring shaft (2-2); an air pipe (3) is arranged outside the stirring shaft (2-2), and the axes of the stirring shaft (2-2), the air pipe (3) and the tank body (1) coincide with each other; an air inlet (3-1) and an air outlet (3-2) are arranged at the upper end of the air pipe (3), and an exhaust valve (3-3) is arranged at the front end of the air outlet (3-2); A water inlet pipe (1-1) is arranged on the upper part of the tank body (1), the water inlet pipe (1-1) extends into the interior of the tank body (1) and a spray head (1-1-1) is arranged at the end of the water inlet pipe (1-1); a discharge pipe (5) is connected to the bottom of the tank body (1), and a porous ceramic support sheet (4) is arranged at the bottom of the tank body (1) for supporting filter paper; A liquid outlet valve (5-1) is arranged at one end of the discharge pipe (5) close to the tank body (1), and a discharge valve (5-2) is installed at the end of the discharge pipe (5); a connecting pipe (7) is arranged on the pipeline between the liquid outlet valve (5-1) and the discharge valve (5-2); The chloride ion detection tube (6) is composed of a detection tube liquid inlet valve (6-1), a detection tube liquid outlet valve (6-2), a tube body (6-3), a liquid storage cup (6-4), a liquid adding valve (6-5), a detection valve (6-6) and a cleaning valve (6-7); the chloride ion detection tube (6) is connected in parallel to the connecting tube (7), wherein the lower side of the tube body (6-3) is connected to the connecting tube (7) through the detection tube liquid inlet valve (6-1), the upper side of the tube body (6-3) is connected to the connecting tube (7) through the detection tube liquid outlet valve (6-2), the upper side of the tube body (6-3) is connected to the liquid storage cup (6-4) through the liquid adding valve (6-5), the lower side of the tube body (6-3) is connected to the turbidity detector (8) through the detection valve (6-6), and a cleaning valve (6-7) is also provided below the tube body 6-3; A connecting water pipe valve (7-1) is arranged in front of the connection point between the connecting pipe (7) and the chloride ion detection tube (6), and a second connecting water pipe valve (7-2) is arranged behind the connection point between the connecting pipe (7) and the chloride ion detection tube (6). The connecting pipe (7) is connected to the water inlet pipe (1-1) of the filter press tank at the rear through a quick-connect joint.

2. The device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein according to claim 1, characterized in that: A pressure gauge is also provided on the upper part of the tank body (1).

3. A device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein according to claim 1 or 2, characterized in that: The connection between the stirring shaft (2-2), the air pipe (3) and the tank body (1) is sealed with silicone rubber.

4. A device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein according to claim 1 or 2, characterized in that: The gas outlet of the air pipe (3) is lower than the liquid level in the tank.

5. A device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein according to claim 1 or 2, characterized in that: The material of the tank body (1) is stainless steel.

6. A device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein according to claim 1 or 2, characterized in that: The material of the stirring paddle (2-3) is polytetrafluoroethylene.

7. A device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein according to claim 1 or 2, characterized in that: A support (9) is also provided at the bottom of the tank body (1) of the filter press tank, and the support (9) supports the tank body (1).

8. A device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein according to claim 1 or 2, characterized in that: The number of filter press tanks is 2 to 4.

9. A device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein according to claim 1 or 2, characterized in that: The turbidity detector (8) is also provided with a data processing and display device (8-1).

10. A device for filtering platinum-carbon catalyst particles and testing the chloride ion concentration therein according to claim 1 or 2, characterized in that: The tube body (6-3) of the chloride ion detection tube (6) is provided with scales.

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