CN214528800U - Preparation facilities of high pigment carbon black - Google Patents
Preparation facilities of high pigment carbon black Download PDFInfo
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- CN214528800U CN214528800U CN202120055676.6U CN202120055676U CN214528800U CN 214528800 U CN214528800 U CN 214528800U CN 202120055676 U CN202120055676 U CN 202120055676U CN 214528800 U CN214528800 U CN 214528800U
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Abstract
The invention discloses a preparation device of high-pigment carbon black, which comprises an ozone generating device, a material mixing device, a gas-solid separation device and a tail gas decomposition device, and is characterized in that the material mixing device comprises a cylinder, a material inlet, a material outlet, a gas inlet and a tail gas outlet; the material outlet is connected with the material tank through a valve body; the gas inlet is connected with the ozone generating equipment; the tail gas outlet is connected with the gas-solid separation equipment; the gas-solid separation equipment can be connected with the tail gas decomposition equipment; the barrel can rotate.
Description
Technical Field
The present invention relates to a device for producing high-quality carbon black, and more particularly, to a device for producing carbon black by oxidizing carbon black with a mixed gas containing ozone and other gases.
Background
In ancient times, people burned animal and vegetable oils, pine branches, and collected the black ash (the earliest carbon black) that was used in the formulation of inks and black pigments. In 1872, the first commercial production of Carbon Black on a large scale occurred in the world, with the formation of the term "Carbon Black".
The pigment carbon black is carbon black used for production of products such as printing ink, paint, plastics and the like, and accounts for about 90% of non-rubber carbon black. The classification of pigment carbon blacks is internationally generally classified into three types, i.e., high-pigment carbon blacks, medium-pigment carbon blacks, and low-pigment carbon blacks, according to the coloring power of the carbon blacks.
The binders for coatings, paints and printing inks are generally polar, whereas conventional carbon black has few surface functional groups and no polarity per se, and thus is difficult to disperse uniformly in a solvent. Therefore, it is necessary to perform oxidation treatment on carbon black to increase oxygen-containing functional groups on the surface of the carbon black, thereby increasing the polarity of the surface of the carbon black and facilitating dispersion in a solvent.
The oxidation modification technology used at home and abroad at present is divided into liquid phase oxidation, gas phase oxidation, plasma oxidation and the like. The liquid phase oxidation uses nitric acid, potassium permanganate, sodium hypochlorite and the like as oxidants, the technology is mature, and generally, the processes of oxidation, water washing, drying and the like are carried out, so that more waste acid and waste water are generated, and the pollution is serious. Plasma oxidation and catalyst oxidation have high requirements on experimental conditions and high required cost. The oxidant used in the gas phase oxidation mainly comprises ozone, oxygen, air, carbon dioxide and the like, wherein the technology for oxidizing carbon black by ozone has the advantages of high oxidation efficiency, mild reaction conditions, environmental protection, low cost and the like.
Xu Chen et al use air and ozone oxidation Carbon black, XPS results show that air oxidation makes the surface oxygen content 7.3 times the original, ozone treatment surface oxygen content 10 times the former (Xu Chen, Mark Farber, et al. mechanisms of surfactant adsorption on non-polar, air-oxidized and ozone-treated Carbon surfaces [ J ] Carbon 2003, 41 (8): 1489-1500). After ozone oxidation treatment, the volatile content of common carbon black is increased, and the pH value is changed from 8.25 to 3-4 (study on surface modification of Yidonating forest, Wanghaixing, ozone oxidation carbon black [ J ], Hebei chemical industry, 2006, 29 (7): 17-19). Experiments show that the pH value of the carbon black is reduced, the volatile content is increased, and the fluidity is increased along with the increase of the ozone oxidation time (Wuhaihua, the oxidation process of the carbon black and the research on preparing water-based color paste by oxidizing the carbon black [ D ]. the university of eastern China & 2017: 31-45).
The ozone oxidation device in US2682448 oxidizes carbon black by using a drum device and an exhaust gas recycling device, so that the pH value of the oxidized carbon black is reduced from 9-10 to 2.9-7. The ozone oxidation unit of US3353980 and CN202509026 uses a fluidized bed unit to oxidize carbon black. US3245820 uses a stirred bed to mix low structure furnace black (E.M. surface area at 120-150 m)2Between/g, BET specific surface area of 100-170m2G, oil absorption value of 7-14gal/100 lbs) with an ozone-containing gas stream to obtain a high flow, high pigment ink. US3333979 uses equipment to grind carbon black, destroys the agglomerate structure of the carbon black, and simultaneously introduces gas (air, oxygen, ozone, etc.) to increase the chemical activity of the carbon black, and the prepared carbon black is applied to butyl rubber, so that the tensile strength, elongation, modulus and wear resistance can be improved. CN201842796 and CN1958145 are both independent material mixing and oxidizing equipment. US9388300 is a liquid phase oxidation apparatus, requiring subsequent drying of the carbon black.
In order to realize industrialization conveniently, the utility model designs a set of high-efficiency and energy-saving gas phase oxidation carbon black method and equipment, the equipment comprises an ozone oxidation carbon black device with a built-in shoveling plate, which can accelerate material mixing and reduce reaction time; contain the tail gas and recycle the device, can not only reuse unreacted ozone, can also separate material and tail gas, do not harm equipment.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a preparation device of high-color carbon black, which comprises an ozone generating device, a material mixing device, a gas-solid separation device and a tail gas decomposition device, and is characterized in that the material mixing device comprises a cylinder, a material inlet, a material outlet, a gas inlet and a tail gas outlet; the material outlet is connected with the material tank through a valve body; the gas inlet is connected with the ozone generating equipment; the tail gas outlet is connected with the gas-solid separation equipment; the gas-solid separation equipment can be connected with the tail gas decomposition equipment; the barrel can rotate.
Preferably, the rotating speed of the cylinder is 0-10r/min, preferably 1-8r/min, and the speed can be regulated by variable frequency.
Preferably, the system further comprises an exhaust gas refiltering device, wherein the exhaust gas refiltering device comprises an air filter and a precision filter which are connected in sequence.
The air inlet of the ozone generating equipment can be filled with air, and the air outlet of the ozone generating equipment is connected with the material mixing equipment.
The air inlet of the ozone generating equipment can also be connected with the tail gas refiltering equipment, and circulating tail gas is introduced.
The material mixing equipment is made of stainless steel materials, a plurality of shoveling plates are arranged in the material mixing equipment, and the included angle between each shoveling plate and the cylinder wall is 30-120 degrees; preferably 50 to 100.
The gas-solid separation equipment is one or more cyclone separators, and the gas-solid separation equipment is connected with the tail gas decomposition equipment and/or the tail gas refiltering equipment.
The exhaust gas decomposition device may destroy ozone in the exhaust gas using high temperature or a catalyst.
The tail gas refilter equipment comprises an air filter and a precision filter which are sequentially connected, and dust is further removed from the tail gas through the tail gas refilter equipment, so that the dust is prevented from entering the ozone generator through a tail gas recycling pipeline.
Through the utility model discloses a carbon black that equipment obtained, the fluidity of carbon black be greater than 20mm, pH value is less than 6, the reflectivity is less than 30.
The utility model aims to provide a high pigment carbon black preparation method and device, this method simple accurate, with low costs is favorable to preparing high pigment carbon black, and device simple structure easily operates, recoverable tail gas of recycling simultaneously.
The utility model discloses the carbon black that chooses for use can be aggregate or powder, through controlling technological conditions such as the rotational speed of ozone concentration, airflow, pressure, reaction temperature and cylinder, changes indexes such as pH value, mobility and the blackness of carbon black, and the carbon black that prepares has mobility height, and pH value is low, characteristics such as blackness reflectivity is low.
The terms "comprising", "including", "containing", "having" and the like in the present invention do not exclude other components or steps not listed in the present invention.
Drawings
FIG. 1 is a schematic structural view of the high-color carbon black manufacturing apparatus of the present invention.
Description of reference numerals: 1-an ozone generator; 2-a cylinder body; 3-material inlet; 4-material outlet; 5-material tank 1; 6, a motor; 7-material tank 2; 8-a cyclone separator 1; 9-material tank 3; 10-a cyclone 2; 11-tail gas decomposition equipment; 12-an air filter; 13-precision filter.
Detailed Description
Example 1
The equipment and the process of the invention are described as follows by combining the attached figure 1:
carbon black enters the cylinder body from the material inlet, the motor drives the cylinder body to rotate at a constant speed through the bearing, mixed gas of ozone and air prepared by the ozone generator enters the cylinder body through the gas inlet, a plurality of shoveling plates are arranged in the cylinder body, so that the carbon black can fully contact with the mixed gas for oxidation reaction, the fully oxidized carbon black enters the material tank 1 through the material outlet for collection, the tail gas enters the cyclone separator 1 through the gas outlet of the cylinder body, gas-solid separation is carried out in a cyclone separator 1, the separated carbon black enters a material tank 2, tail gas from the cyclone separator 1 is introduced into the cyclone separator 2 for gas-solid separation again, the separated carbon black enters a material tank 3, the tail gas passes through a three-way pipe, the waste gas can directly enter a waste gas decomposer device for waste gas treatment, and can also enter an ozone generator through an air filter and a precision filter as a gas source.
Example 2
Ozone is generated by an air source ozone generator, the volume ratio of ozone to air is 10:1, the gas flow rate is 5L/min, the rotating speed of a roller is 1r/min, the reaction temperature is 40 ℃, and when carbon black is oxidized for 1h, the main technical indexes of the produced carbon black are shown in a table I:
table carbon black Performance indices before and after Oxidation
| Before treatment | After treatment | Reference national standard | |
| pH | 8.9 | 3.0 | GB/T7045 |
| Fluidity/mm | 16.5 | 28.5 | GB/T7052 |
| Blackness (reflectivity) | 37.8 | 25.1 | GB/T7048 |
Example 3
Ozone is generated by an air source ozone generator, the volume ratio of ozone to oxygen is 1:1, the gas flow rate is 10L/min, the rotating speed of a roller is 6r/min, the reaction temperature is 20 ℃, and when carbon black is oxidized for 0.5h, the main technical indexes of the produced carbon black are shown in the following table II:
carbon black performance index before and after surface oxidation
| Before treatment | After treatment | Reference national standard | |
| pH | 8.9 | 2.3 | GB/T7045 |
| Fluidity/mm | 16.5 | 30.6 | GB/T7052 |
| Blackness (reflectivity) | 37.8 | 22.1 | GB/T7048 |
Example 4
Ozone is generated by an air source ozone generator, the volume ratio of the ozone to the circulating tail gas is 1:5, the gas flow rate is 2L/min, the rotating speed of a roller is 3r/min, the reaction temperature is 30 ℃, and when carbon black is oxidized for 2 hours, the main technical indexes of the produced carbon black are shown in the third table:
carbon black performance index before and after table tri-oxidation
| Before treatment | After treatment | Reference national standard | |
| pH | 8.9 | 3.1 | GB/T7045 |
| Fluidity/mm | 16.5 | 27.9 | GB/T7052 |
| Blackness (reflectivity) | 37.8 | 25.6 | GB/T7048 |
Claims (5)
1. A preparation device of high-pigment carbon black comprises an ozone generation device, a material mixing device, a gas-solid separation device and a tail gas decomposition device, and is characterized in that the material mixing device comprises a cylinder, a material inlet, a material outlet, a gas inlet and a tail gas outlet; the material outlet is connected with the material tank through a valve body; the gas inlet is connected with the ozone generating equipment; the tail gas outlet is connected with the gas-solid separation equipment; the gas-solid separation equipment can be connected with the tail gas decomposition equipment; the barrel can rotate.
2. The apparatus of claim 1, further comprising a tail gas refiltering device, wherein the gas-solid separation device is connected with the tail gas refiltering device; the tail gas refiltering device comprises an air filter and a precision filter which are sequentially connected.
3. The apparatus as claimed in claim 1, wherein the air inlet of the ozone generating device is accessible to air.
4. The apparatus of claim 2, wherein the air inlet of the ozone generating means is also connectable to the exhaust gas refiltering means.
5. The apparatus of claim 1, wherein the gas-solid separation device is one or more cyclones.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120055676.6U CN214528800U (en) | 2021-01-11 | 2021-01-11 | Preparation facilities of high pigment carbon black |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120055676.6U CN214528800U (en) | 2021-01-11 | 2021-01-11 | Preparation facilities of high pigment carbon black |
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| Publication Number | Publication Date |
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| CN214528800U true CN214528800U (en) | 2021-10-29 |
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