TWI702260B - Carbon black treatment system after pyrolysis of waste rubber and plastic - Google Patents

Abstract

A carbon black treatment system for waste rubber and plastic after cracking, comprising: a storage tank unit to collect cracked crude carbon black; a magnetic separation unit to separate metal components; a quantitative output unit to control the output flow of crude carbon black; a crushing unit to crush the crude carbon black; One particle size classification unit sieving out standard diameter and large diameter carbon black; the grinding unit grinds and grinds large diameter carbon black; the second particle size classification unit sieving out standard diameter and large diameter carbon black; carbon black collection unit collects Standard diameter carbon black; carbon black wetting unit wets standard diameter carbon black; carbon black ash removal unit makes standard diameter carbon black deashed carbon black; carbon black granulation unit mixes deashed carbon black with dry carbon black to granulate; carbon black The drying unit dries the carbon black; the carbon black cooling and conveying unit cools and conveys the carbon black; the carbon black screening unit screens out the carbon black that meets the particle size; the carbon black storage unit sends the carbon black to the carbon black storage tank.

Description

Carbon black treatment system after pyrolysis of waste rubber and plastic

A carbon black processing system, in particular, refers to a system that automatically processes carbon black after pyrolysis of waste rubber and plastic, improves the quality of carbon black and maintains the carbon black with similar particle size.

Nowadays, people all over the world communicate frequently. As a result of frequent exchanges, people from all over the world continue to move around, which greatly increases the demand for transportation. No matter if you take airplanes, vehicles, etc., tires are required, and the use of tires is greatly increased. As the number of tires increases, the number of tires that need to be replaced due to wear and tear increases greatly. Tires are rubber products. Therefore, the recycling and reuse of waste rubber has become an important issue.

The carbon black in rubber and plastic components is the main recycling target in today's technology. Carbon black is a reinforcing material for rubber mixtures. Because of its excellent stability, carbon black can theoretically be recycled and reused continuously, but due to rubber, Plastic formulations need to add other metal and non-metal oxides or compounds to meet the basic specifications used in general commercial applications. Such substances cannot be separated from the solid carbon black in the waste rubber pyrolysis process, or because of high temperature Due to the pyrolysis, part of the material also participates in the chemical reaction, which produces additional ash, the so-called carbon black ash.

In addition, carbon black is an extremely important industrial raw material, which can be used for reinforcement or shielding of rubber, plastic, ink, and masterbatch. However, carbon black production is an extremely energy-consuming industry. If carbon black can be reused, it will be a great contribution to human society, because every ton of primary carbon black production will use two tons of petrochemical fuel and emit nearly five tons of carbon dioxide. It is extremely detrimental to the suppression of greenhouse gas emissions. Carbon black recycling is an extremely environmentally friendly process, because recycling from waste rubber and plastic is a good thing with two birds with one stone. In addition to solving the problem of rubber and plastic flooding and pollution, it also achieves energy saving by recycling carbon black. Reduction purpose. Because the process is extremely difficult, so far countries around the world are still working hard to study and try to find a more perfect solution.

In addition, various accelerators, anti-aging agents, anti-ultraviolet or other additives, dyeing agents, etc. are added in the plastic or rubber production process. These chemicals will remain in the carbon black after the cracking of the rubber and plastic. The quality of carbon black recovered from rubber and plastic cannot be as pure as virgin carbon black. Therefore, the recycled carbon black needs to undergo processes such as upgrading and refining, so that the quality of the recycled carbon black can return to comparable to that of virgin carbon black and can be reused.

The use of carbon black is mainly to take advantage of its high surface area and high structural characteristics to make elastomers or plastics have a larger contact area and entanglement, which will produce a larger reinforcement or shielding effect. Therefore, the recycling of carbon black only needs to take into account the relevant quality. Characteristics, it can produce the same effect as virgin carbon black, there is no problem in repeated use.

The purpose of the present invention is to provide a carbon black treatment system for waste rubber and plastic after pyrolysis, which is suitable for powdered bulk coarse carbon black of different sizes after pyrolysis of waste rubber and plastic. The metal components in the coarse carbon black are removed by magnetic force and then Use classification equipment to homogenize the coarse carbon black particle size to perform high-efficiency wetting, ash removal, dehydration, granulation, drying, cooling, and then carbon black screening, packaging and screening of carbon black. Become a carbon black finished product.

In order to achieve the objective of the above system, the technical means provided by the present invention is a waste rubber and plastic cracked carbon black treatment system, which includes: a storage tank unit for collecting waste rubber and plastic cracked coarse carbon black; a magnet The selection unit is used for transporting the crude carbon black from the storage tank unit to a buffer tank, and at least one magnetic magnet is used to separate the adsorbable metal components in the crude carbon black; a certain amount of output unit is used for The coarse carbon black in the buffer tank is controlled by a rotating throttle valve to control the output flow of the coarse carbon black to quantitatively output to a screw conveyor to stably supply the coarse carbon black; a crushing unit is the output of the quantitative output unit The coarse carbon black is crushed into carbon blacks of different particle sizes and output; a first particle size grading unit is used to screen the carbon black output from the crushing unit to the standard diameter carbon black and larger than Large-diameter carbon black with preset particle size and output separately; a grinding unit for grinding the large-diameter carbon black output from the first particle size classification unit into carbon black with different particle sizes and output ; A second particle size grading unit for screening the carbon black output from the milling unit into standard diameter carbon black meeting the preset particle size and large diameter carbon black larger than the preset particle size, respectively Output, and the large-diameter carbon black larger than the predetermined particle size is output to the grinding unit to process its particle size; a carbon black capture unit for collecting the sieved by the second particle size classification unit Standard diameter carbon black; a carbon black wetting unit for wetting the standard diameter carbon black of the carbon black capture unit; a carbon black ash removal unit including an extraction unit with a built-in chemical liquid and a dehydration unit for The wet standard diameter carbon black sent to the extraction unit produces chemical action, so that the standard diameter carbon black forms a carbon black slurry, and then the carbon black slurry is discharged to the dehydration unit to remove excess water and become dehydrated carbon Black; a carbon black granulating unit, mixing the dehydrated carbon black with a powdery dry carbon black, and controlling the mixing ratio for granulation to form carbon black that meets the preset particle size; a carbon black drying unit , The carbon black produced by the carbon black granulation unit is placed in a drying furnace, and the drying furnace is placed in a fire box to introduce hot air from the fire box to heat the carbon black and dry the carbon black A lifter at the end of the drying furnace is concentrated and discharged at the center of the drying furnace; a carbon black cooling and conveying unit for cooling and conveying the carbon black processed by the carbon black drying unit; a carbon black screening unit for processing the carbon black The carbon black cools the carbon black conveyed by the conveying unit, and separates the metal components again, and screens the carbon black particle size. The carbon black whose particle size does not meet the preset particle size is returned to the carbon black granulation unit , To retain carbon black that meets the preset particle size; a carbon black storage unit transports the carbon black that meets the preset particle size screened by the carbon black screening unit to a carbon black storage tank.

In one embodiment, it further includes a carbon black packaging unit for taking out the carbon black in the carbon black storage tank and packaging to make a carbon black product.

In one embodiment, the chemical liquid of the carbon black ash removing unit is an acid liquid, and the extraction unit includes a pickling tank to remove metal ions or metal oxides in the standard coarse carbon black; or, the carbon The chemical liquid of the black ash removing unit is an acid liquid, and the extraction unit includes a pickling tank to remove metal ions or metal oxides in the standard diameter coarse carbon black.

In one embodiment, the chemical liquid further comprises the chemical liquid being an alkaline solution, and the extraction unit comprises an alkaline washing tank. The standard diameter coarse carbon black is added to the alkaline washing tank to remove the standard diameter coarse carbon The silicon dioxide contained in the black is then removed from the excess water by the dehydration unit.

In one embodiment, the moisture content of the wet carbon black and the dry carbon black after mixing is 30-40%.

In one embodiment, the moisture content of the carbon black after drying needs to be less than 2%.

The features of the invention include: the invention applies the principle of magnetism to separate the magnetically adsorbable metal components mixed in the coarse carbon black, so that the subsequent coarse carbon black is easy to process, and these metal components also have economic value. The invention can crush coarse carbon blacks of different sizes in advance to a predetermined particle size close to a preset particle size suitable for processing, can accelerate the particle size screening speed and shorten the process time. The present invention can produce carbon black of similar particle size. In addition, the present invention also performs carbon black ash removal (extraction using chemical methods) during the manufacturing process to improve the quality of the produced carbon black.

The embodiments of the present invention are described in detail below in conjunction with the drawings. The accompanying drawings are mainly simplified schematic diagrams, which only schematically illustrate the basic structure of the present invention. Therefore, only elements related to the present invention are indicated in these drawings. And the displayed components are not drawn based on the number, shape, size ratio, etc. of the actual implementation. The actual size of the actual implementation is a selective design, and the component layout may be more complicated.

First, please refer to Figure 1. The carbon black processing system 1 in this embodiment includes: a storage tank unit 11, a magnetic separation unit 12, a certain amount output unit 13, a pulverization unit 14, a first particle size classification unit 15, and a grinding unit 16 , A second particle size classification unit 17, a carbon black capture unit 18, a carbon black wetting unit 19, a carbon black ash removal unit 20, a carbon black granulation unit 21, a carbon black drying unit 22, a carbon black The black cooling conveying unit 23, a carbon black screening unit 24, and a carbon black storage unit 25.

The storage tank unit 11 is used to collect waste rubber and plastic cracked coarse carbon black; the magnetic separation unit 12 is used to transport the coarse carbon black in the storage tank unit 11 to a buffer tank (not shown in the figure) ), at least one magnetic magnet is used to separate the adsorbable metal components in the coarse carbon black; the quantitative output unit 13 is used to pass the coarse carbon black in the buffer tank through a flow control mechanism (not shown) It is shown that the flow control mechanism (such as a rotating throttle valve and other components) controls the output flow of coarse carbon black to quantitatively output it to a screw conveyor to stably supply coarse carbon black to subsequent units for continuous processing; the crushing unit 14 is The coarse carbon black output by the quantitative output unit 13 is crushed into carbon black of different particle sizes and output; the first particle size classification unit 15 is used for further screening the carbon black output by the crushing unit 14 The standard diameter carbon black 151 meeting the preset particle size and the large diameter carbon black 152 larger than the preset particle size are output separately; the grinding unit 16 is used to output the first particle size classification unit 15 The large diameter carbon black 152 is pulverized into carbon black of different particle sizes and output; the second particle size classification unit 17 is used to screen the carbon black output from the grinding unit 16 to meet the preset particle size The standard diameter carbon black 171 and the large diameter carbon black 172 larger than the predetermined particle size are output separately, and the large diameter carbon black 172 larger than the predetermined particle size is output to the grinding unit for processing. Particle size; the carbon black capturing unit 18 is used to collect the standard diameter carbon black 171 sieved out by the second particle size classification unit 17; a carbon black wetting unit 19 is used to wet the carbon black capturing unit 18 The standard diameter carbon black 171; carbon black ash removal unit 20, which includes an extraction unit 201 with a built-in chemical liquid and a dehydration unit 202, used to send the wet standard diameter carbon black 171 to the extraction unit 201 to produce Chemical action, so that the standard diameter carbon black 171 forms a carbon black slurry, and then the carbon black slurry is discharged to the dehydration unit 202 to remove excess water and become dehydrated carbon black (wet carbon black); carbon black granulation unit 21 , The dehydrated carbon black is mixed with a powdered dry carbon black, and the mixing ratio of the dehydrated carbon black and the dry carbon black is controlled for granulation (preferably, the moisture content after the two is mixed is 30-40% At this time, it is better to start granulation, which can easily form the required particle size under proper humidity, and the formed carbon black has a moisture content of less than 2%) to form a carbon black that meets the preset particle size; The carbon black drying unit 22 puts the carbon black produced by the carbon black granulation unit 21 into a drying furnace, and places the drying furnace in a fire box to introduce hot air from the fire box to heat the carbon black , The dried carbon black is discharged from the center of the drying furnace by the lifter at the end of the drying furnace; the carbon black cooling and conveying unit 23 is used to cool and transport the carbon black processed by the carbon black drying unit 22; carbon black screening The unit 24 is used to process the carbon black conveyed by the carbon black cooling and conveying unit 23, and apply the principle of magnetic attraction again to separate the metal components in the carbon black and screen the carbon black particle size, The unqualified carbon black 242 whose carbon black particle size does not meet the preset particle size is returned to the carbon black granulation unit 21 for re-granulation, while the qualified carbon black 241 that meets the preset particle size is retained; The storage unit 25 transports the qualified carbon black 241 of the predetermined particle size screened by the carbon black screening unit 24 to a carbon black storage tank to obtain high blackness quality carbon black of the same particle size.

Of course, in one embodiment, a carbon black packaging unit 26 may be further included for taking out the carbon black from the carbon black storage tank and packaging to make a carbon black product.

In one embodiment, the chemical liquid of the aforementioned carbon black ash removing unit 20 can be an acid liquid, and the extraction unit 201 can be a pickling tank 2011, and the metal in the standard diameter carbon black 171 is removed by the acid liquid Ions or metal oxides to reduce the gray scale of carbon black (that is, increase the blackness).

In one embodiment, the aforementioned chemical liquid further includes lye, and the extraction unit 201 may be an alkaline washing tank (or the extraction unit 201 may be an acid washing tank and an alkaline washing tank). The diameter carbon black 171 is added to the alkaline washing tank to remove the silicon dioxide (ie white carbon black) contained in the standard diameter carbon black 171, and then the dehydration unit 202 removes excess water.

The above-mentioned embodiments only illustrate the principles, features and effects of the present invention, and are not intended to limit the scope of implementation of the present invention. Anyone who is familiar with the art can comment on the above without departing from the spirit and scope of the present invention. Modifications and changes to the implementation form. Any equivalent changes and modifications made by using the contents disclosed in the present invention shall still be covered by the following patent application scope. Therefore, the protection scope of the present invention should be as listed in the scope of patent application.

1: Carbon black processing system 11: Storage tank unit 12: Magnetic separation unit 13: Quantitative output unit 14: Crushing unit 15: First particle size classification unit 151: Standard diameter carbon black 152: Large diameter carbon black 16: Grinding unit 17: Second particle size classification unit 171: Standard diameter carbon black 172: Large diameter carbon black 18: Carbon black capture unit 19: Carbon black wetting unit 20: Carbon black ash removal unit 201: Extraction unit 2011: Pickling tank 2012 : Alkaline washing tank 202: Dehydration unit 21: Carbon black granulation unit 22: Carbon black drying unit 23: Carbon black cooling and conveying unit 24: Carbon black screening unit 241: Qualified carbon black 242: Unqualified carbon black 25: Carbon black storage Unit 26: Carbon black packaging unit

FIG. 1 is a three-dimensional system diagram of a carbon black treatment system after pyrolysis of waste rubber and plastic according to an embodiment of the present invention.

1: Carbon black treatment system

11: storage tank unit

12: Magnetic separation unit

13: Quantitative output unit

14: Crushing unit

15: The first particle size classification unit

151: Standard diameter carbon black

152: Large diameter carbon black

16: Milling unit

17: The second particle size classification unit

171: Standard diameter carbon black

172: Large diameter carbon black

18: Carbon black capture unit

19: Carbon black wetting unit

20: Carbon black ash removal unit

201: Extraction unit

2011: pickling tank

2012: Alkaline washing tank

202: dehydration unit

21: Carbon black granulation unit

22: Carbon black drying unit

23: Carbon black cooling conveyor unit

24: Carbon black screening unit

241: qualified carbon black

242: unqualified carbon black

25: Carbon black storage unit

26: Carbon black packaging unit

Claims (5)

The carbon black processing system after plastic cracking includes: a storage tank unit for collecting waste rubber and crude carbon black after plastic cracking; a magnetic separation unit for transporting the crude carbon black in the storage tank unit to a buffer tank In the conveying path, at least one magnetic magnet is used to separate the adsorbable metal components in the coarse carbon black; a certain amount of output unit is used to control the coarse carbon black in the buffer tank through a flow control mechanism The output flow rate is quantitatively output to a screw conveyor to stably supply coarse carbon black; a crushing unit, which crushes the coarse carbon black output by the quantitative output unit into carbon black of different particle sizes and outputs; The particle size classification unit is used to screen the carbon black output from the crushing unit to a standard diameter carbon black meeting a preset particle size and a large diameter carbon black larger than the preset particle size, and to output them separately; Unit for pulverizing the large-diameter carbon black output from the first particle size classification unit into carbon black of different particle sizes and output; a second particle size classification unit for the output of the grinding unit The carbon black screens the standard diameter carbon black that meets the preset particle size and the large diameter carbon black larger than the preset particle size, and outputs them separately, and the large diameter carbon black is output to the milling unit to process the particles Diameter size; A carbon black collection unit for collecting the standard diameter carbon black sieved by the second particle size classification unit; a carbon black wetting unit for wetting the standard diameter carbon black of the carbon black collection unit ; A carbon black ash removal unit, which includes an extraction unit with a built-in chemical liquid and a dehydration unit to chemically react the wet standard diameter carbon black sent to the extraction unit, thereby forming the standard diameter carbon black The carbon black slurry is then discharged to the dehydration unit to remove excess water and become wet dehydrated carbon black; a carbon black granulation unit mixes the dehydrated carbon black with a powdery dry carbon black, And control the mixing ratio for granulation to form carbon black particles conforming to the preset particle size; a carbon black drying unit, the carbon black particles made by the carbon black granulation unit are placed in a drying furnace, and The drying furnace is placed in a fire box to introduce the hot air of the fire box to heat the carbon black, and the dried carbon black is discharged from the center of the drying furnace by the lifter at the end of the drying furnace; a carbon black is cooled and transported A unit for cooling and conveying the carbon black processed by the carbon black drying unit; a carbon black screening unit for processing the carbon black conveyed by the carbon black cooling and conveying unit, and again separating the metal components and the carbon black particle size Size screening, sending the unqualified carbon black whose particle size does not meet the preset particle size back to the carbon black granulation unit to reshape its particle size, and output qualified carbon black that meets the preset particle size; and A carbon black storage unit transports the qualified carbon black that meets the preset particle size screened by the carbon black screening unit to a carbon black storage tank. For example, the carbon black treatment system for waste rubber and plastic after pyrolysis described in item 1 of the scope of patent application further includes a carbon black packaging unit for taking out the carbon black from the carbon black storage tank and packaging it to make One carbon black finished product. For example, the carbon black treatment system after pyrolysis of waste rubber and plastic described in the scope of patent application, wherein the chemical liquid of the carbon black ash removal unit is an acid liquid, and the extraction unit includes a pickling tank to remove the standard diameter Metal ions or metal oxides in coarse carbon black. For example, the carbon black treatment system after pyrolysis of waste rubber and plastic in the scope of the patent application, wherein the chemical liquid further includes the chemical liquid as an alkaline liquid, and the extraction unit includes an alkaline washing tank for the standard diameter carbon black It is added to the alkaline washing tank to remove the non-metal oxide containing silicon dioxide contained in the standard diameter carbon black, and then the excess water is removed by the dehydration unit. For example, the carbon black treatment system for waste rubber and plastic after pyrolysis described in item 1 of the scope of patent application, wherein the moisture content of the dehydrated carbon black and the dried carbon black after mixing is 30-50%, and the granulation is started to form The moisture content of the carbon black after drying is less than 2%.

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