Pretreatment system of carbon material

Abstract

The utility model relates to the field of catalyst preparation, and discloses a pretreatment system of a carbon material, which comprises a washing unit and a drying unit, the washing unit comprises a bubbling washing unit and a warm water washing unit; the bubbling washing unit is used for carrying out bubbling washing on the carbon material, and a working medium is flowing water and gas; the warm water washing unit is used for carrying out warm water washing on the carbon material, and a working medium is flowing water; and the drying unit is used for drying the carbon material from the washing unit. The pretreatment system for the carbon material has the advantages of being capable of removing impurities and fine powder at the same time, simple, safe and environmentally friendly, and a carbon material carrier obtained by pretreating the carbon material through the pretreatment system for the carbon material can efficiently adsorb active components.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of catalyst preparation, and particularly relates to a pretreatment system of carbon material. BACKGROUND

[0002] Because of its rich pore structure, large specific surface area and excellent adaptability, the carbon material catalyst carrier with carbon element as the main component has very wide application in the catalyst industry. However, various impurities on the carbon material may have adverse effects on subsequent catalytic chemical reactions. A large amount of wastewater produced by using acid washing method to remove impurities will cause environmental pollution and has safety hazards. In addition, because of poor wear resistance, the carbon material as a catalyst carrier often carries a large amount of fine powder. When preparing the catalyst, these fine powders will also adsorb active components, compete with the carbon material, reduce the loading rate of active components, and cause material loss. Therefore, for the carbon material catalyst carrier, it is necessary to develop a carrier pretreatment system that can greenly and safely remove impurities and fine powder at the same time. SUMMARY

[0003] The utility model discloses a pretreatment system of carbon material, which can overcome the problems of the prior art, such as low efficiency of carrier adsorbing active components, large pollution and safety hazards caused by the carrier carrying a large amount of fine powder. The pretreatment system of carbon material has the advantages of being able to remove impurities and fine powder at the same time, simple, safe and environmentally friendly. The carbon material carrier obtained by using the pretreatment system of carbon material to pretreat the carbon material can efficiently adsorb active components.

[0004] The pretreatment system of carbon material provided by the utility model will be described in detail below. It should be understood that the description herein is only for illustration and explanation of the utility model and does not limit the utility model. The endpoints and any values disclosed in this text are not limited to the exact range or value, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, the endpoints of each range, the endpoints of each range and individual point values, and individual point values can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0005] In the utility model, "fine powder" refers to carbon material with a particle size of less than 1mm.

[0006] In the utility model, carbon material refers to carbon material containing metal impurities and fine powder.

[0007] The utility model provides a kind of pretreatment system of carbon material, the system includes: washing unit, drying unit, wherein, washing unit includes: bubble washing unit, hot water washing unit;Bubble washing unit: for the bubble washing of carbon material, working medium is flowing water and gas;Hot water washing unit: for the hot water washing of carbon material, working medium is flowing water;Drying unit is used to dry the carbon material from washing unit.

[0008] In the utility model, the connection order of bubble washing unit and hot water washing unit is not specially limited, as long as the purpose of the utility model can be achieved, and appropriate connection order can be selected, and the following is exemplary description, but not therefore limit the scope of the utility model. According to one preferred embodiment of the utility model, the pretreatment system includes bubble washing unit, hot water washing unit and drying unit connected in series along the material flow direction. According to another preferred embodiment of the utility model, the pretreatment system includes hot water washing unit, bubble washing unit and drying unit connected in series along the material flow direction.

[0009] According to one preferred embodiment of the utility model, the pretreatment system further includes a screening unit, and the screening unit is used for screening the carbon material to be washed.

[0010] According to one preferred embodiment of the utility model, the pretreatment system further includes an iron removal unit, and the iron removal unit is used for removing iron from the carbon material to be washed.

[0011] According to one preferred embodiment of the utility model, the pretreatment system further includes a polishing unit, and the polishing unit is used for polishing the carbon material to be washed.

[0012] In the utility model, the connection order of screening unit, iron removal unit and polishing unit is not specially limited, as long as the purpose of the utility model can be achieved, and appropriate connection order can be selected, and the following is exemplary description, but not therefore limit the scope of the utility model. According to one preferred embodiment of the utility model, the pretreatment system includes screening unit, iron removal unit and polishing unit connected in series along the material flow direction.

[0013] In the utility model, the polishing mode of polishing unit is not specially limited, as long as the purpose of the utility model can be achieved, and appropriate mode can be selected, and the following is exemplary description, but not therefore limit the scope of the utility model. According to one preferred embodiment of the utility model, the polishing unit is arranged to be capable of dry grinding and wet grinding.

[0014] According to one preferred embodiment of the utility model, the pretreatment system further includes an elemental analysis unit, and the elemental analysis unit is used for elemental analysis of the carbon material after washing.

[0015] According to a preferred embodiment of the utility model, the role of the element analysis is: if the metal element content in the carbon material after washing is >2200 ug / g, preferably, the K element content is >1000 ug / g, or the Na element content is >1000 ug / g, or the Fe element content is >200 ug / g, then the carbon material is sent into the washing unit again.In the utility model, the element analysis unit can be selected and determined as required.

[0016] In the utility model, as long as the purpose of element analysis on the carbon material after washing can be achieved, the composition of the element analysis unit is not specially limited, and the following is exemplarily explained, but the scope of the utility model is not limited thereto.According to a preferred embodiment of the utility model, the element analysis unit comprises: an inductively coupled plasma spectrometer.

[0017] In the utility model, as long as the purpose of bubble washing of the carbon material can be achieved, the composition of the bubble washing unit is not specially limited, and the following is exemplarily explained, but the scope of the utility model is not limited thereto.According to a preferred embodiment of the utility model, the bubble washing unit comprises: a fine powder content detection device, which is used for fine powder content detection on the effluent water of the bubble washing unit.Further, according to a preferred embodiment of the utility model, the bubble washing unit comprises: a first washing kettle, a flowing water inlet, a flowing water outlet, a fine powder content detection device and a gas inlet arranged on the first washing kettle.

[0018] In the utility model, as long as the purpose of warm water washing of the carbon material can be achieved, the composition of the warm water washing unit is not specially limited, and the following is exemplarily explained, but the scope of the utility model is not limited thereto.According to a preferred embodiment of the utility model, the warm water washing unit comprises: a TDS analysis device, which is used for TDS analysis on the effluent water of the warm water washing unit.Further, according to a preferred embodiment of the utility model, the warm water washing unit comprises: a second washing kettle, a flowing water inlet, a flowing water outlet and a TDS analysis device arranged on the second washing kettle.

[0019] The pretreatment system of the carbon material has the advantages of being capable of removing impurities and fine powder simultaneously, being simple, safe and environmentally friendly, and the carbon material carrier obtained by pretreating the carbon material by using the pretreatment system of the carbon material has high active component adsorption efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the implementation process and device schematic diagram in the embodiment.

[0021] REFERENCE SIGNS

[0022] 1 - shaker; 2 - tramp iron remover; 3 - tumbler; 4 - first washing kettle; 5, 5' - flowing water inlet; 6, 6' - flowing water outlet; 7 - fine powder content detection device; 8 - gas inlet; 9 - second washing kettle; 10 - TDS analysis device. DETAILED DESCRIPTION

[0023] The present application will be described in detail below by way of examples. It is necessary to point out here that the following examples are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above content of the present application.

[0024] The specific experimental steps or conditions not mentioned in the examples and comparative examples can be carried out according to the conventional experimental steps described in the literature in the art or the operation or conditions. The reagents or instruments not mentioned by the manufacturer are all conventional products that can be obtained by purchase.

[0025] In the examples,

[0026] The pretreatment of carbon materials uses Figure 1 The flow and equipment shown are realized, wherein:

[0027] The screening unit comprises a shaker;

[0028] The tramp iron removal unit comprises a tramp iron remover;

[0029] The polishing unit comprises a tumbler;

[0030] The bubbling washing unit comprises a first washing kettle and a flowing water inlet, a flowing water outlet, a fine powder content detection device, and a gas inlet arranged on the first washing kettle;

[0031] The warm water washing unit comprises a second washing kettle and a flowing water inlet, a flowing water outlet, and a TDS analysis device arranged on the second washing kettle;

[0032] The elemental analysis unit comprises an inductively coupled plasma spectrometer;

[0033] The drying unit comprises an oven.

[0034] Table 1 is the particle size distribution, fine powder content, and metal element content of the samples at each stage in Example 1;

[0035] Table 2 is the particle size distribution, fine powder content, metal element content, and noble metal loading rate of the samples after pretreatment in each example;

[0036] Method for testing noble metal loading rate: the pretreated carbon material sample is immersed in chloroplatinic acid solution, then dried and calcined, and the mass of platinum loaded on the carbon material sample is detected, and the noble metal loading rate = mass of platinum loaded on the carbon material sample / mass of platinum in the chloroplatinic acid solution consumed * 100%.

[0037] Example 1

[0038] The carbon material sample 1 (activated carbon, wherein the proportion of activated carbon with a particle size of 4-8 mesh is 92.3wt%, the fine powder content is 0.42wt%, the K content is 4366μg / g, the Na content is 1519μg / g, and the Fe content is 760μg / g) is sent to a vibrating screen machine for screening, and the upper screen of the vibrating screen machine is 4 mesh and the lower screen is 8 mesh. The sample between the two screens after screening is sent to an iron remover for iron removal, and then to a rotary pot for polishing, first dry grinding for 5min, and then wet grinding for 8min, and the volume ratio of carbon material to water during wet grinding is 1:0.1.

[0039] The polished sample is sent to a first washing kettle for bubble washing, flowing water is introduced through the flowing water inlet, and the flowing water is discharged from the flowing water outlet, so that the volume ratio of carbon material to water in the first washing kettle is maintained at 1:1.8, and air is introduced through the gas inlet at the same time, wherein the conductivity of the water is 1μS / cm, the water flow rate is 3m / s, the gas flow rate is 3m / s, and the bubble diameter is 10-20mm. At the same time, the fine powder content detection device arranged at the flowing water outlet is used to detect the fine powder content of the water discharged from the flowing water outlet arranged on the first washing kettle every 5min, and when the difference between the fine powder content and the result of the last fine powder content detection is less than 5% of the result of the last fine powder content detection, the bubble washing is stopped.

[0040] The sample after bubble washing is sent to a second washing kettle for warm water washing, flowing water is introduced through the flowing water inlet, and the flowing water is discharged from the flowing water outlet, so that the volume ratio of carbon material to water in the second washing kettle is maintained at 1:1.8, wherein the conductivity of the water is 1μS / cm, and the water temperature is 60℃. At the same time, the TDS analysis device arranged at the flowing water outlet is used to analyze the TDS of the water discharged from the flowing water outlet arranged on the second washing kettle every 5min, and when the difference between the TDS value and the result of the last TDS analysis is less than 5% of the result of the last TDS analysis, the warm water washing is stopped.

[0041] The washed sample is sent to an inductively coupled plasma spectrometer for element analysis, and the K element content is 756 μg / g, the Na element content is 545 μg / g, and the Fe element content is 106 μg / g. The sample after element analysis is sent to an oven for drying, the drying temperature is 120℃, and the sample is dried to a moisture content of less than 1%, to obtain the pretreated carbon material sample 1'. The particle size distribution, fine powder content, and metal element content of the samples at each stage are shown in Table 1.

[0042] Example 2

[0043] According to the method of Example 1, except that no screening unit is provided, and the to-be-washed carbon material is not screened.

[0044] Example 3

[0045] According to the method of Example 1, except that no iron removal unit is provided, and the to-be-washed carbon material is not iron-removed.

[0046] Example 4

[0047] According to the method of Example 1, except that no polishing unit is provided, and the to-be-washed carbon material is not polished.

[0048] Comparative Example 1

[0049] According to the method of Example 1, except that only a screening unit is provided, and no subsequent pretreatment is performed.

[0050] Table 1 Particle size distribution, fine powder content, and metal element content of samples at each stage in Example 1

[0051]

[0052] Table 2 Particle size distribution, fine powder content, and metal element content of pretreated samples in each example

[0053]

[0054] The above detailed the pretreatment system of the carbon material provided by the present application, but the present application is not limited thereto. Within the technical concept of the present application, various simple modifications can be made to the technical solution of the present application, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present application will not be described again. However, these simple modifications and combinations should also be considered as disclosed by the present application, and all belong to the protection scope of the present application.

Claims

1. A pretreatment system of carbon material, characterized by, The system comprises: a washing unit, a drying unit, wherein, The washing unit comprises: a bubbling washing unit, a warm water washing unit; The bubbling washing unit is used for bubbling washing of the carbon material, and the working medium is flowing water and gas; The warm water washing unit is used for warm water washing of the carbon material, and the working medium is flowing water; The drying unit is used for drying the carbon material from the washing unit.

2. The pre-treatment system of claim 1, wherein, The pre-treatment system comprises, in the direction of the material flow, the bubbling washing unit, the warm water washing unit, and the drying unit in series.

3. The pre-treatment system of claim 1, wherein, The pre-treatment system comprises, in the direction of the material flow, the warm water washing unit, the bubbling washing unit, and the drying unit in series.

4. The pre-treatment system of any of claims 1-3, wherein, The pre-treatment system further comprises: a screening unit for screening the carbon material to be washed; and / or an iron removal unit for removing iron from the carbon material to be washed; and / or a grinding unit for grinding the carbon material to be washed.

5. The pre-treatment system of claim 4, wherein, The pre-treatment system comprises, in the direction of the material flow, the screening unit, the iron removal unit, and the grinding unit in series.

6. The pre-treatment system of claim 4, wherein, The grinding unit is configured to be capable of dry grinding and wet grinding.

7. The pre-treatment system of any of claims 1-3, wherein, The pre-treatment system further comprises: an elemental analysis unit for elemental analysis of the carbon material after washing.

8. The pre-treatment system according to any one of claims 1-3, wherein, The bubbling washing unit comprises: a fine powder content detection device for fine powder content detection of the effluent water of the bubbling washing unit; and / or The warm water washing unit comprises: a TDS analysis device for TDS analysis of the effluent water of the warm water washing unit.

9. The pre-treatment system of any of claims 1-3, wherein, The bubbling washing unit comprises: a first washing kettle, a flowing water inlet arranged on the first washing kettle, a flowing water outlet, a fine powder content detection device, and a gas inlet.

10. The pre-treatment system of any of claims 1-3, wherein, The warm water washing unit comprises: a second washing kettle, a flowing water inlet arranged on the second washing kettle, a flowing water outlet, and a TDS analysis device.

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