A production system for removing impurities from a carbon black dispersion

Abstract

The utility model relates to the technical field of carbon black production, especially to a production system for removing impurities in carbon black dispersion liquid, which comprises an oxidation kettle connected with a carbon black dispersion liquid conveying pipeline, a discharge port of the oxidation kettle connected with a sedimentation device, a discharge port of the sedimentation device connected with an adsorption device, a discharge port of the adsorption device connected with a first filter device, a discharge port of the first filter device connected with a second filter device, a discharge port of the second filter device connected with a third filter device, and a discharge port of the third filter device connected with a carbon black dispersion liquid storage tank. The production system has a reasonable structure and can effectively remove impurities in the carbon black dispersion liquid, greatly improving the purity of the carbon black dispersion liquid and thus ensuring the corresponding use effect.

Description

Technical Field

[0001] This utility model relates to the field of carbon black production technology, and in particular to a production system for removing impurities from carbon black dispersion. Background Technology

[0002] Carbon black dispersions are stable systems formed by uniformly dispersing carbon black particles in a liquid medium (such as water, organic solvents, etc.). Their core components are carbon black, a dispersion medium, and dispersing agents. Based on their functional properties, they are commonly used in inks, coatings, batteries, antistatic coatings, and rubber applications. In practical applications, carbon black dispersions require uniform black color, free from stratification and sedimentation. However, due to contamination from raw carbon black materials, dispersion media, additives, or the production process, carbon black dispersions often contain impurities (such as common mechanical impurities like metal scraps and sand particles), undispersed carbon black aggregates, and water-soluble ions (such as metal ions). If these impurities are not removed, they can affect the stability of the carbon black dispersion, thereby impacting its performance. Therefore, it is necessary to develop a production system for removing impurities from carbon black dispersions. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a production system for removing impurities from carbon black dispersion, which can effectively remove impurities from carbon black dispersion, greatly improve the purity of carbon black dispersion, and thus ensure its corresponding use effect.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A production system for removing impurities from a carbon black dispersion includes an oxidation reactor connected to a carbon black dispersion conveying pipeline. The outlet of the oxidation reactor is connected to a settling device, the outlet of the settling device is connected to an adsorption device, the outlet of the adsorption device is connected to a first filtration device, the outlet of the first filtration device is connected to a second filtration device, the outlet of the second filtration device is connected to a third filtration device, and the outlet of the third filtration device is connected to a carbon black dispersion storage tank.

[0006] As an improved technical solution, the oxidation reactor includes a reactor body, with a feed inlet and an oxidant inlet at the top of the reactor body, and a discharge outlet at the bottom of the reactor body. The reactor body is equipped with a stirring shaft, one end of which is connected to a motor. The stirring shaft is equipped with multiple stirring rods, and the stirring rods are equipped with multiple hollowed-out stirring blocks.

[0007] As an improved technical solution, the sedimentation device includes a body, the top of which is provided with a feed inlet and a flocculant inlet, the bottom of which is provided with a sediment outlet, and the upper side of which is provided with a discharge outlet; the body is provided with a rotating shaft inside, one end of which is connected to a motor, and multiple stirring components are provided on the rotating shaft, with iron filings adsorption components between two adjacent stirring components.

[0008] As a further improved technical solution, the number of the multiple stirring components is four, and each stirring component includes two stirring plates, on which multiple cones are provided.

[0009] As a further improved technical solution, the iron filings adsorption component is a magnetic plate symmetrically arranged on both sides of the stirring shaft, and the magnetic plate is detachably connected to the rotating shaft.

[0010] As an improved technical solution, the adsorption device includes a body, with an inlet on the upper part of one side of the body and an outlet on the lower part of the other side of the body. The interior of the body is provided with an activated carbon adsorption layer, a silica adsorption layer and a chelating resin adsorption layer in sequence.

[0011] As an improved technical solution, the thickness ratio of the activated carbon adsorption layer, the silica adsorption layer, and the chelating resin adsorption layer is 0.5:1:1.5.

[0012] As an improved technical solution, the first filtration device is a ceramic membrane treatment device with a pore size of 0.1-10μm.

[0013] As an improved technical solution, the second filtration device is an ultrafiltration membrane treatment device with a molecular weight cutoff of 1,000-100,000 Daltons.

[0014] As an improved technical solution, the third filtration device is a nanofiltration membrane treatment device with a molecular weight cutoff of 200-2000 Daltons.

[0015] After adopting the above technical solution, the beneficial effects of this utility model are:

[0016] The production system for removing impurities from carbon black dispersion includes an oxidation reactor connected to a carbon black dispersion conveying pipeline. The outlet of the oxidation reactor is connected to a settling device, the outlet of the settling device is connected to an adsorption device, the outlet of the adsorption device is connected to a first filter, the outlet of the first filter is connected to a second filter, the outlet of the second filter is connected to a third filter, and the outlet of the third filter is connected to a carbon black dispersion storage tank. Under the operation of the conveying pump, the carbon black dispersion enters the oxidation reactor along the carbon black dispersion conveying pipeline. After treatment with an oxidant (oxidizing low-valence metal ions to high-valence states, making them easier to precipitate or complex and separate), it enters the settling device along the pipeline. After adding a flocculant, it undergoes flocculation and sedimentation (removing metal fragments and sand particles). The carbon black dispersion then enters the adsorption device along the pipeline, where a large number of metal ions are removed through adsorption treatment. It then enters the first filter, the treated carbon black dispersion enters the second filter, and then the third filter. Finally, it is stored in the carbon black dispersion storage tank. The production system with the above structure is reasonably designed and can effectively remove impurities from the carbon black dispersion, greatly improving the purity of the carbon black dispersion and thus ensuring its corresponding performance.

[0017] The oxidation reactor consists of a reactor body with a feed inlet and an oxidant inlet at the top and a discharge outlet at the bottom. Inside the reactor body is a stirring shaft, one end of which is connected to a motor. Multiple stirring rods are mounted on the shaft, and each stirring rod has a perforated stirring block. When the carbon black dispersion and oxidant enter the reactor body, the motor starts, driving the stirring shaft, stirring rods, and stirring blocks to rotate. These three components work together to mix the carbon black dispersion and oxidant, ensuring thorough contact and reaction between the oxidant and the carbon black dispersion. This achieves the oxidation of metal ions in the carbon black dispersion, facilitating subsequent processing.

[0018] The sedimentation device comprises a main body with a feed inlet and flocculant inlet at the top, a sediment outlet at the bottom, and a discharge outlet on one side of the upper part. Inside the main body is a rotating shaft, one end of which is connected to a motor. Multiple stirring components are mounted on the shaft, with iron filings adsorbing components positioned between adjacent stirring components. The carbon black dispersion, after oxidation treatment, enters the main body, and flocculant is added. Once the motor starts, it drives the rotating shaft, multiple stirring components, and adsorption components to mix the carbon black dispersion and flocculant, ensuring thorough contact and facilitating the flocculation and sedimentation of metal filings and other impurities, thus significantly improving flocculation efficiency. The iron filings adsorption component can also adsorb metal iron filings.

[0019] The system comprises four mixing components, each consisting of two mixing plates with multiple conical sections. Upon motor startup, the two mixing plates and the conical sections on each component rotate, ensuring thorough contact between the flocculant and the carbon black dispersion, thus improving flocculation efficiency. Simultaneously, the conical sections also disperse any aggregated carbon black.

[0020] The iron filings adsorption component consists of symmetrically arranged magnetic plates on both sides of the stirring shaft, with a detachable connection between the magnetic plates and the shaft. The magnetic plates can attract iron filings, and once a certain amount has been attracted, the magnetic plates can be removed from the shaft for cleaning. This structure facilitates the removal of iron filings from the carbon black dispersion; the detachable design makes installation and disassembly convenient and cleaning easy.

[0021] Since the adsorption device includes a main body, a feed inlet is provided on the upper part of one side of the main body, and a discharge outlet is provided on the lower part of the other side of the main body, the interior of the main body is provided with an activated carbon adsorption layer, a silica adsorption layer and a chelating resin adsorption layer in sequence.

[0022] The thickness ratio of the activated carbon adsorption layer, the silica adsorption layer, and the chelating resin adsorption layer is 0.5:1:1.5. This thickness ratio allows for better removal of metal ions.

[0023] Because the first filtration device is a ceramic membrane treatment device with a pore size of 0.1–10 μm, it can effectively remove adsorbent powder, undispersed carbon black particles, and other impurities produced during the adsorption process, preventing contamination of subsequent equipment and impacting the treatment effect.

[0024] The second filtration device is an ultrafiltration membrane treatment device with a molecular weight cutoff of 1,000-100,000 Daltons. It can retain colloids, incompletely dispersed carbon black particles, large molecular organic matter, and bacteria, etc.

[0025] The third filtration unit is a nanofiltration membrane treatment device that retains molecular weights in the 200-2000 Dalton range. It retains divalent metal ions (such as Ca). 2+ Mg 2+ At the same time, it retains some monovalent ions and small molecules to maintain the ion balance of the dispersion. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a production system for removing impurities from carbon black dispersion according to the present invention;

[0027] Among them, 1-carbon black dispersion conveying pipeline, 2-oxidation kettle, 20-stirring rod, 21-stirring block, 3-sedimentation device, 30-stirring component, 300-stirring plate, 301-conical body, 31-iron filings adsorption component, 4-adsorption device, 40-activated carbon adsorption layer, 41-silica adsorption layer, 42-chelating resin adsorption layer, 5-first filter device, 6-second filter device, 7-third filter device, 8-carbon black dispersion storage tank, 9-connecting rod. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] A production system for removing impurities from carbon black dispersions, such as Figure 1 As shown, the system includes an oxidation reactor 2 connected to a carbon black dispersion conveying pipeline 1. The outlet of the oxidation reactor 2 is connected to a settling device 3. The outlet of the settling device 3 is connected to an adsorption device 4. The outlet of the adsorption device 4 is connected to a first filtration device 5 (a ceramic membrane treatment device with a pore size of 0.1-10μm). The outlet of the first filtration device 5 is connected to a second filtration device 6 (an ultrafiltration membrane treatment device with a molecular weight cutoff of 1000-100000 Daltons). The outlet of the second filtration device 6 is connected to a third filtration device 7 (a nanofiltration membrane treatment device with a molecular weight cutoff of 200-2000 Daltons). The outlet of the third filtration device 7 is connected to a carbon black dispersion storage tank 8.

[0030] Under the operation of the delivery pump, the carbon black dispersion enters the oxidation reactor through the carbon black dispersion delivery pipe. After treatment with the oxidant (oxidizing low-valence metal ions to high-valence states, making them easier to precipitate or complex and separate), it enters the sedimentation device through the pipe. After adding flocculant, it undergoes flocculation and sedimentation (removing metal fragments and sand particles). The carbon black dispersion then enters the adsorption device through the pipe, where it removes a large number of metal ions after adsorption treatment. It then enters the first filtration device through the pipe (effectively removing adsorbent powder, undispersed carbon black particles, and other impurities from the adsorption process, preventing contamination of subsequent equipment and affecting the treatment effect). The treated carbon black dispersion then enters the second filtration device (which retains colloids, incompletely dispersed carbon black particles, large molecular organic matter, and bacteria, etc.) and finally enters the third filtration device (which retains divalent metal ions, such as Ca). 2+ Mg 2+(While retaining some monovalent ions and small molecules to maintain the ionic balance of the dispersion), the carbon black dispersion is finally stored in a storage tank. The production system with the above structure is rationally designed, effectively removing impurities from the carbon black dispersion, greatly improving its purity, and thus ensuring its performance in use.

[0031] The oxidation reactor 2 includes a reactor body with a feed inlet and an oxidant inlet at the top and a discharge outlet at the bottom. Inside the reactor body is a stirring shaft, one end of which is connected to a motor. Multiple stirring rods 20 are mounted on the stirring shaft, and multiple hollowed-out stirring blocks 21 are mounted on the stirring rods. Carbon black dispersion and oxidant enter the reactor body. After the motor starts, it drives the stirring shaft, multiple stirring rods, and stirring blocks to rotate. These three components work together to stir and mix the carbon black dispersion and oxidant, promoting full contact and reaction between the oxidant and the carbon black dispersion. This achieves the oxidation of metal ions in the carbon black dispersion, facilitating subsequent processing.

[0032] The settling device 3 includes a main body with a feed inlet and a flocculant inlet at the top, a settling outlet at the bottom, and a discharge outlet on one side of the upper part. Inside the main body is a rotating shaft, one end of which is connected to a motor. Multiple stirring components 30 are mounted on the shaft, and an iron filings adsorption component 31 is positioned between adjacent stirring components. The carbon black dispersion after oxidation treatment enters the main body, and flocculant is added. After the motor starts, it drives the rotating shaft, multiple stirring components, and the adsorption component to mix the carbon black dispersion and flocculant, ensuring sufficient contact between the two and facilitating the flocculation and settling of metal filings and other impurities, thus greatly improving flocculation efficiency. The iron filings adsorption component can also adsorb metal iron filings.

[0033] The system comprises four mixing components 30, each including two mixing plates 300 with multiple conical bodies 301 on each plate. Upon motor startup, the two mixing plates and the multiple conical bodies on each mixing component rotate, ensuring sufficient contact between the flocculant and the carbon black dispersion, thus improving flocculation efficiency. Simultaneously, the multiple conical bodies also disperse the aggregated carbon black.

[0034] The iron filings adsorption component 31 consists of symmetrically arranged magnetic plates on both sides of the stirring shaft. The magnetic plates are detachably connected to the shaft (the stirring shaft has an integral connecting rod 9, and one end of the magnetic plate has a threaded hole, with the magnetic block threadedly connected to the connecting rod). The magnetic plates can adsorb iron filings. When a certain amount is adsorbed, the magnetic plates can be removed from the shaft through an opening on the side wall of the main body (the opening is equipped with a sealing cap). After cleaning, they can be reinstalled on the stirring shaft.

[0035] The adsorption device 4 includes a body, with an inlet on the upper part of one side of the body and an outlet on the lower part of the other side of the body. Inside the body, there are sequentially arranged an activated carbon adsorption layer 40, a silica adsorption layer 41, and a chelating resin adsorption layer 42.

[0036] The thickness ratio of the activated carbon adsorption layer 40, the silica adsorption layer 41, and the chelating resin adsorption layer 42 is 0.5:1:1.5. This thickness ratio allows for better adsorption and removal of metal ions.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A production system for removing impurities from a carbon black dispersion, characterized by, The system includes an oxidation reactor connected to a carbon black dispersion conveying pipeline. The outlet of the oxidation reactor is connected to a settling device. The outlet of the settling device is connected to an adsorption device. The outlet of the adsorption device is connected to a first filtration device. The outlet of the first filtration device is connected to a second filtration device. The outlet of the second filtration device is connected to a third filtration device. The outlet of the third filtration device is connected to a carbon black dispersion storage tank.

2. The production system for removing impurities from carbon black dispersion according to claim 1, characterized in that, The oxidation reactor includes a reactor body, with a feed inlet and an oxidant inlet at the top and a discharge outlet at the bottom. A stirring shaft is located inside the reactor body, with one end of the stirring shaft connected to a motor. Multiple stirring rods are mounted on the stirring shaft, and multiple hollowed-out stirring blocks are mounted on the stirring rods.

3. The production system for removing impurities from carbon black dispersion according to claim 1, characterized in that, The sedimentation device includes a main body, with a feed inlet and a flocculant inlet at the top, a sediment outlet at the bottom, and a discharge outlet on one side of the upper part of the main body; the main body has a rotating shaft inside, one end of which is connected to a motor, and multiple stirring components are provided on the rotating shaft, with an iron filings adsorption component between two adjacent stirring components.

4. The production system for removing impurities from carbon black dispersion according to claim 3, characterized in that, The number of the multiple stirring components is four, and each stirring component includes two stirring plates, on which multiple cones are provided.

5. The production system for removing impurities from carbon black dispersion according to claim 3, characterized in that, The iron filings adsorption component consists of symmetrically arranged magnetic plates on both sides of the stirring shaft, and the magnetic plates are detachably connected to the rotating shaft.

6. The production system for removing impurities from carbon black dispersion according to claim 1, characterized in that, The adsorption device includes a body, with an inlet on the upper part of one side of the body and an outlet on the lower part of the other side of the body. The interior of the body is provided with an activated carbon adsorption layer, a silica adsorption layer and a chelating resin adsorption layer in sequence.

7. A production system for removing impurities from carbon black dispersion according to claim 6, characterized in that, The thickness ratio of the activated carbon adsorption layer, the silica adsorption layer, and the chelating resin adsorption layer is 0.5:1:1.

5.

8. The production system for removing impurities from carbon black dispersion according to claim 1, characterized in that, The first filtration device is a ceramic membrane treatment device with a pore size of 0.1-10μm.

9. A production system for removing impurities from carbon black dispersion according to claim 1, characterized in that, The second filtration device is an ultrafiltration membrane treatment device with a molecular weight cutoff of 1,000-100,000 Daltons.

10. A production system for removing impurities from carbon black dispersion according to claim 1, characterized in that, The third filtration device is a nanofiltration membrane treatment device with a molecular weight cutoff of 200-2000 Daltons.

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