CN113717550B - Device and method for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles - Google Patents
Device and method for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles Download PDFInfo
- Publication number
- CN113717550B CN113717550B CN202110979194.4A CN202110979194A CN113717550B CN 113717550 B CN113717550 B CN 113717550B CN 202110979194 A CN202110979194 A CN 202110979194A CN 113717550 B CN113717550 B CN 113717550B
- Authority
- CN
- China
- Prior art keywords
- carbon black
- pyrolysis
- flue gas
- spiral
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000006229 carbon black Substances 0.000 title claims abstract description 153
- 239000002245 particle Substances 0.000 title claims abstract description 120
- 239000010920 waste tyre Substances 0.000 title claims abstract description 32
- 229920001971 elastomer Polymers 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000000197 pyrolysis Methods 0.000 claims abstract description 201
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 114
- 239000003546 flue gas Substances 0.000 claims abstract description 114
- 239000007789 gas Substances 0.000 claims abstract description 33
- 239000002296 pyrolytic carbon Substances 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 66
- 229910052757 nitrogen Inorganic materials 0.000 claims description 27
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000010926 purge Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 abstract description 41
- 238000002834 transmittance Methods 0.000 abstract description 14
- 238000004939 coking Methods 0.000 description 8
- 239000000693 micelle Substances 0.000 description 7
- 238000013021 overheating Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 229920002209 Crumb rubber Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 238000007233 catalytic pyrolysis Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229940098458 powder spray Drugs 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 238000007158 vacuum pyrolysis Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/44—Carbon
- C09C1/48—Carbon black
- C09C1/482—Preparation from used rubber products, e.g. tyres
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
The invention discloses a device and a method for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles, wherein the device comprises a support, and a feeding screw, a rubber particle pyrolysis screw, a carbon black deep pyrolysis screw and a cooling screw are fixed on the support; the feeding screw comprises a horizontal screw and a vertical screw which are connected with each other, and the input end of the colloidal particle pyrolysis screw is provided with a central flue gas inlet, a central flue gas outlet, a pyrolysis spiral sheet, a colloidal particle inlet, a jacket flue gas inlet, a pyrolysis gas outlet, a first pyrolysis carbon black outlet and a jacket flue gas outlet; the carbon black deep pyrolysis spiral is provided with a conveying spiral pyrolysis carbon black inlet, a flue gas inlet, a second pyrolysis carbon black outlet and a flue gas outlet; the pyrolytic carbon black inlet is communicated with the first pyrolytic carbon black outlet; the inlet end of the cooling screw is connected with the second pyrolytic carbon black outlet; the output end of the hot blast stove is respectively communicated with the jacket flue gas inlet and the flue gas inlet through a flue gas pipeline. The invention can independently adjust the pyrolysis temperature and realize that the light transmittance index of the pyrolysis carbon black toluene is more than 85 percent.
Description
Technical Field
The invention relates to the technical field of harmless and resource utilization of solid wastes, in particular to a device and a method for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles.
Background
The environment-friendly carbon black generally means that the total content of polycyclic aromatic hydrocarbon PAHS in the carbon black is less than 10ppm or the light transmittance of toluene is higher than 80%. Polycyclic aromatic hydrocarbons in carbon black have carcinogenicity, and the carbon black has a wide range of applications, so the requirements for the quality of the carbon black are higher and higher. In the prior art, the high-quality environment-friendly carbon black is prepared by mainly using low-density coal tar and ethylene tar which are generated by anoxic combustion. The waste tire contains about 30 percent of carbon black, and with the development of the waste tire pyrolysis technology, the environment-friendly carbon black prepared by pyrolyzing waste tire colloidal particles realizes the resource utilization of the waste tire on the one hand and avoids the environmental pollution caused by disordered rough treatment such as waste tire stacking, landfill and the like on the other hand.
The pyrolysis of the waste tire refers to the process of decomposing the waste tire into products such as combustible gas, pyrolysis oil, pyrolysis carbon black and the like in an oxygen-free atmosphere by heating. There are many methods for pyrolysis of waste tires, such as catalytic pyrolysis, vacuum pyrolysis, hydropyrolysis, low-temperature pyrolysis, superheated steam stripping pyrolysis, co-pyrolysis, plasma pyrolysis, and the like; the reactor mainly adopts a moving bed, a fixed bed, a rotary kiln and a fluidized bed.
For example, chinese patent publication No. CN212532869U discloses an integrated fixed bed reactor for co-pyrolysis of biomass and waste plastics, which includes a first pyrolysis chamber, a second pyrolysis chamber, and a catalytic chamber; the first pyrolysis bin is positioned at the upper part and comprises a first bin gate, a first material tray, a first outlet pipeline and a first heater for heating the first pyrolysis bin; the second pyrolysis bin is positioned in the middle and comprises a second bin door, a second material tray, a second outlet pipeline and a second heater for heating the second pyrolysis bin; the catalytic bin is positioned at the lower part and comprises a third inlet pipeline, a third inlet, a catalytic reactor, a third outlet and a third bin gate; the first outlet conduit, the second outlet conduit and the third inlet conduit provided with the mixer are connected.
Chinese patent publication No. CN107384458A discloses a high-temperature pyrolysis reactor, which comprises a reactor body, a rubber powder spray pipe, a nozzle, a mixer, a cooling device, a chilled gas nozzle, and the like.
In the prior art, the moving bed pyrolysis technology can reduce the secondary reaction of pyrolysis intermediate products, thereby improving the yield of pyrolysis oil; the low pressure advantageously reduces the amount of carbonaceous residue that adheres to the pyrolytic carbon black, thereby increasing its potential for reuse as carbon black. But the flue gas flow of the existing moving bed pyrolysis device is single, the system temperature cannot be independently adjusted according to the pyrolysis characteristic of colloidal particles, the pyrolysis rate of the colloidal particles is low, the oil content of the pyrolytic carbon black is high, the light transmittance of the pyrolytic carbon black toluene is less than 1%, and the index of export environment-friendly carbon black cannot be reached.
Disclosure of Invention
The invention provides a device for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles, which adopts two-stage pyrolysis screws, wherein the pyrolysis temperature can be independently controlled and adjusted, and the light transmittance index of pyrolysis carbon black toluene is larger than 85% by combining high-temperature nitrogen purging.
A device for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles comprises a support and a hot blast stove, wherein a feeding screw, a rubber particle pyrolysis screw, a carbon black deep pyrolysis screw and a cooling screw are fixed on the support;
the feeding screw comprises a horizontal screw and a vertical screw which are connected with each other, and a storage bin for storing and supplying colloidal particles is arranged on the horizontal screw; the colloidal particles are extruded and fed by a horizontal screw and a vertical screw in sequence and then enter a colloidal particle pyrolysis screw;
the input end of the colloidal particle pyrolysis spiral is provided with a central flue gas inlet, and the output end of the colloidal particle pyrolysis spiral is provided with a central flue gas outlet; a pyrolysis spiral sheet is arranged inside the colloidal particle pyrolysis spiral, a colloidal particle inlet is formed in the upper side wall of the colloidal particle pyrolysis spiral, which is close to the input end, a jacket flue gas inlet is formed in the lower side wall of the colloidal particle pyrolysis spiral, and the colloidal particle inlet is communicated with the lower end of the vertical spiral; the upper side wall of the colloidal particle pyrolysis spiral, which is close to the output end, is provided with a pyrolysis gas outlet, and the lower side wall of the colloidal particle pyrolysis spiral, which is close to the output end, is provided with a first pyrolysis carbon black outlet and a jacket flue gas outlet;
a conveying screw is arranged inside the carbon black deep pyrolysis screw, the input end of the carbon black deep pyrolysis screw is provided with a pyrolysis carbon black inlet and a flue gas inlet, and the output end of the carbon black deep pyrolysis screw is provided with a second pyrolysis carbon black outlet and a flue gas outlet; the pyrolytic carbon black inlet is communicated with the first pyrolytic carbon black outlet;
the inlet end of the cooling screw is connected with the second pyrolytic carbon black outlet and is used for reducing the temperature of the carbon black;
the output end of the hot blast stove is provided with a tee joint which is respectively communicated with the jacket flue gas inlet and the flue gas inlet through a flue gas pipeline and is used for providing heat for the colloidal particle pyrolysis spiral and the carbon black deep pyrolysis spiral; and a flue gas pipeline communicated with the flue gas inlet is provided with a regulating valve.
In the invention, in order to realize the sealing of the feeding port and reduce the gap between the rubber particles, the feeding is carried out in a mode of combining a horizontal screw and a vertical screw. In the operation process, the horizontal spiral is full of materials, and when the colloidal particles are conveyed horizontally, the colloidal particles can be extruded compactly, so that the sealing effect is achieved, meanwhile, the gap between the colloidal particles is reduced through extrusion, and air brought by feeding is reduced. Because the two spirals are 90 degrees, in order to prevent the blockage of the horizontal spiral, the output force of the vertical spiral in the feeding spiral is 5 to 10 percent higher than that of the horizontal spiral.
In order to further improve the quality of the carbon black, a high-temperature nitrogen port is preferably arranged at the second pyrolytic carbon black outlet of the deep pyrolytic spiral of the carbon black, and the flow direction of the nitrogen gas is opposite to the conveying direction of the pyrolytic carbon black. High temperature nitrogen gas can prevent oil gas cooling condensation, and the existence of nitrogen gas makes the interior pyrolysis tolerance of carbon black degree of depth pyrolysis spiral reduce simultaneously, prevents that pyrolysis gas from adsorbing on the carbon black surface after cooling to water-cooling spiral. Further preferably, the high-temperature nitrogen gas can be replaced by a high-temperature non-condensable gas, wherein the non-condensable gas refers to the non-condensable gas after condensation of the pyrolysis gas.
In order to realize the accurate control of the quality of the pyrolytic carbon black, preferably, temperature measuring points are arranged at a jacket flue gas inlet, a jacket flue gas outlet, a central flue gas inlet, a central flue gas outlet and a flue gas inlet of a carbon black deep pyrolysis spiral of the colloidal particle pyrolysis spiral.
In order to ensure the temperature of the deep pyrolysis of the carbon black, preferably, the flue gas inlet is arranged at the lower part of the spiral input end of the deep pyrolysis of the carbon black, and the flue gas entering the flue gas inlet is mixed flue gas of the hot blast stove and the central flue gas outlet. The existing multi-stage spiral pyrolysis system has single flue gas flow and can not adjust the temperature of each stage according to the pyrolysis process. At the initial stage of micelle pyrolysis, because the temperature is low, the intensification needs to absorb more heat, and the heat transfer difference in temperature is big, and higher wall temperature can lead to the coking, and high temperature can lead to the productivity of oil to reduce simultaneously, consequently adopts lower wall temperature to make the pyrolysis rate of micelle reach 93% ~ 95% in micelle pyrolysis spiral, and then recycles the temperature that carbon black degree of depth pyrolysis spiral slightly improved carbon black, and supplementary with high temperature nitrogen gas again, the oil gas of absorption on carbon black surface is got rid of to the high efficiency.
Preferably, the jacket flue gas outlet of the colloidal particle pyrolysis spiral is communicated with the central flue gas inlet. In order to avoid local overheating and coking of the colloidal particle pyrolysis spiral jacket, the flue gas inlet of the colloidal particle pyrolysis spiral jacket is divided into two ports, the flue gas enters the jacket from the bottom, high-temperature flue gas discharged from the jacket enters the center again to continue heating colloidal particles, and the heat exchange area is increased. The flue gas temperature of the inlet of the colloidal particle pyrolysis spiral jacket is high, and the flow velocity of the flue gas is reduced by the two inlets, so that the wall surface temperature at the inlet is reduced, and overheating and coking in a local area are avoided.
In order to avoid local overheating and coking of the colloidal particle pyrolysis spiral, a jacket flue gas inlet of the colloidal particle pyrolysis spiral is divided into two ports, the flue gas enters the jacket from the bottom, high-temperature flue gas discharged from the jacket enters a central flue gas inlet again to continue heating colloidal particles, and the heat exchange area is increased. The flue gas temperature of the jacket inlet of the colloidal particle pyrolysis spiral is high, and the flow velocity of the flue gas is reduced by the two inlets, so that the wall surface temperature at the inlet is reduced, and overheating and coking in a local area are avoided.
In order to improve the quality of the pyrolytic carbon black, preferably, the pyrolysis rate of colloidal particles in the colloidal particle pyrolysis spiral reaches 93-95%. The waste tire colloidal particles basically complete pyrolysis in the colloidal particle pyrolysis spiral, so that the carbon black only removes a small amount of oil gas adsorbed on the surface of the carbon black in the deep pyrolysis spiral, the coking cannot be caused even if the temperature of the carbon black is slightly increased, and the gas yield cannot be obviously increased.
Since the scrap tire rubber particles expand first and then decrease during pyrolysis, in order to prevent the rubber particles from expanding and blocking the spiral, the rotation speed of the pyrolysis spiral of the rubber particles is preferably controlled to make the treatment capacity of the pyrolysis spiral 55-60% of the cold full load treatment capacity. The cold full load here is the maximum transport capacity in the cold non-heated state at the same rotational speed. Meanwhile, due to the poor heat conduction performance of the colloidal particles, the temperature of the colloidal particles close to the wall surface is high, the temperature far away from the wall surface is low, the spiral rotating speed is properly increased, the mixing of the colloidal particles is facilitated, and the colloidal particles are heated uniformly.
Furthermore, one end of the cooling spiral is provided with a carbon black inlet and a cooling water inlet, the other end of the cooling spiral is provided with a cold carbon black outlet and a cooling water outlet, and the carbon black inlet is communicated with the second pyrolysis carbon black outlet, so that deep pyrolysis of the carbon black is realized.
In order to meet the environmental protection carbon black standard, the toluene transmittance index of the carbon black at the outlet of the cooling spiral cold carbon black is preferably higher than 85%.
The invention also provides a method for preparing the environment-friendly carbon black by pyrolyzing the waste tire colloidal particles, and the device for preparing the environment-friendly carbon black by pyrolyzing the waste tire colloidal particles comprises the following steps:
step 1, adding colloidal particles into a stock bin;
step 4, adjusting the load of the hot blast stove to ensure that the flue gas temperature of the flue gas inlet of the upper jacket of the colloidal particle pyrolysis spiral is 740-760 ℃, and the flue gas temperature of the flue gas outlet of the jacket is 560-580 ℃;
and 5, adjusting an adjusting valve on a flue gas pipeline between the hot blast stove and the flue gas inlet to ensure that the temperature of the flue gas inlet of the deep pyrolysis spiral of the carbon black is 550-570 ℃.
step 7, introducing heated nitrogen into a high-temperature nitrogen port, wherein the temperature of the nitrogen is 430-450 ℃;
and 8, cooling and discharging the pyrolytic carbon black from a cold carbon black outlet of the cooling spiral.
In the method, the temperature of the colloidal particle pyrolysis spiral and the temperature of the carbon black deep pyrolysis spiral can be independently adjusted, so that the quality of the carbon black can be better controlled.
Further, in the step 5, the temperature of the carbon black at the outlet of the second pyrolytic carbon black on the carbon black deep pyrolysis spiral is controlled to be 420-440 ℃, and the nitrogen flow of the high-temperature nitrogen port is 0.5-1 Nm3/h。
In order to reduce the discharge port of the pyrolysis gas, further, in step 6, a small amount of pyrolysis gas and high-temperature nitrogen gas generated by the deep pyrolysis spiral of the carbon black are discharged from the pyrolysis gas outlet of the colloidal particle pyrolysis spiral in a direction opposite to the movement direction of the carbon black.
Compared with the prior art, the invention has the advantages that:
the device has high pyrolysis efficiency, the temperatures of the colloidal particle pyrolysis spiral and the carbon black deep pyrolysis spiral can be independently adjusted, and the quality of the pyrolysis carbon black is high (the light transmittance of methylbenzene is higher than 85%).
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for producing environmentally friendly carbon black by pyrolyzing scrap tire crumb rubber in accordance with an embodiment of the present invention;
FIG. 2 is a graph showing the variation of the transmittance of carbon black toluene with the temperature of the flue gas at the spiral inlet for deep pyrolysis of carbon black in the example of the present invention;
FIG. 3 shows the temperature of the main temperature measurement point for stable operation of the device in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described below with reference to the following embodiments and the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments without inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "including" or "comprising" and the like in the present invention is intended to mean that the elements or items listed before the word "comprise" or "comprising" and the like, include the elements or items listed after the word and their equivalents, but do not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Fig. 1, the device for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles in the embodiment comprises: support 1, feed bin 2, feed spiral 3, micelle pyrolysis spiral 4, carbon black degree of depth pyrolysis spiral 5, cooling screw 6, hot-blast furnace 701, high temperature nitrogen gas mouth 8.
The support 1 is arranged in multiple layers and used for supporting all devices; the storage bin 2 is used for storing colloidal particles and has a sealing function.
The feed screw 3 is used for extruding feed and reducing the clearance of colloidal particles and comprises a horizontal screw 301 and a vertical screw 302.
The colloidal particle pyrolysis spiral 4 is heated inside and outside simultaneously, the flue gas flow direction is the same as the colloidal particle movement direction, and the flue gas heating device comprises a colloidal particle inlet 401, a pyrolysis gas outlet 402, a first pyrolysis carbon black outlet 403, a jacket flue gas inlet 404, a jacket flue gas outlet 405, a central flue gas inlet 406, a central flue gas outlet 407 and a pyrolysis spiral sheet 408.
The oil gas adsorbed on the surface of the carbon black is removed at high temperature by the deep pyrolysis spiral 5 of the carbon black, and the quality of the carbon black is improved, wherein the oil gas comprises a pyrolysis carbon black inlet 501, a second pyrolysis carbon black outlet 502, a flue gas inlet 503, a flue gas outlet 504 and a conveying spiral 505.
The cooling screw 6 is used for reducing the temperature of the carbon black and comprises a carbon black inlet 601, a cold carbon black outlet 602, a cooling water inlet 603 and a cooling water outlet 604.
The hot blast stove 701 burns pyrolysis gas to generate high-temperature flue gas to provide heat for the pyrolysis device; the outlet of the hot blast stove 701 is provided with a tee joint 702, one part of flue gas reaches the colloidal particle pyrolysis spiral 4, one part of flue gas reaches the carbon black deep pyrolysis spiral 5, and a flue gas pipeline reaching the carbon black deep pyrolysis spiral 5 is provided with an adjusting valve 703.
In the device, a plurality of temperature measuring points are arranged, including a jacket flue gas inlet temperature measuring point 901 of a colloidal particle pyrolysis spiral, a jacket flue gas outlet temperature measuring point 902, a central flue gas inlet temperature measuring point 903, a central flue gas outlet temperature measuring point 904 and a flue gas inlet temperature measuring point 905 of a carbon black deep pyrolysis spiral.
In order to realize the sealing of the feeding port and reduce the gaps among the colloidal particles, the feeding is carried out in a mode of combining the horizontal screw 301 and the vertical screw 302, and in the operation process, the horizontal screw 301 is filled with the colloidal particles, so that the colloidal particles can be extruded and compacted when the colloidal particles are conveyed horizontally. Because the two screws are 90 degrees, in order to prevent the horizontal screw 301 from being blocked, the output force of the vertical screw 302 in the feeding screw is 5 to 10 percent higher than that of the horizontal screw.
In order to avoid local overheating and coking of the colloidal particle pyrolysis spiral 4, a jacket flue gas inlet of the colloidal particle pyrolysis spiral 4 is divided into two ports, the flue gas enters the jacket from the bottom, high-temperature flue gas coming out from the jacket enters the center again to continue heating colloidal particles, and the heat exchange area is increased.
Because the waste tire colloidal particles expand and then reduce in the pyrolysis process, in order to prevent the colloidal particles from expanding and blocking the spiral, the rotating speed of the pyrolysis spiral of the colloidal particles is controlled, so that the treatment capacity of the pyrolysis spiral is 55-60% of the cold full-load treatment capacity. Meanwhile, due to the poor heat conduction performance of the colloidal particles, the temperature of the colloidal particles close to the wall surface is high, the temperature far away from the wall surface is low, the spiral rotating speed is properly increased, the mixing of the colloidal particles is facilitated, and the colloidal particles are heated uniformly.
In order to improve the quality of the pyrolytic carbon black, the pyrolysis rate of colloidal particles in the colloidal particle pyrolysis spiral 4 reaches 93-95%.
To achieve deep pyrolysis of carbon black, a pyrolytic carbon black inlet 501 of the carbon black deep pyrolysis spiral 5 is connected to a first pyrolytic carbon black outlet 403 of the colloidal particle pyrolysis spiral 4.
In order to ensure the temperature of the deep pyrolysis of the carbon black, a flue gas inlet 503 of the deep pyrolysis spiral 5 of the carbon black is positioned at the bottom, and the flue gas is mixed flue gas of an outlet of the hot blast stove 701 and a central flue gas outlet 407 of the colloidal particle pyrolysis spiral 4. The existing multi-stage spiral pyrolysis system has single flue gas flow and can not adjust the temperature of each stage according to the pyrolysis process. At the initial stage of micelle pyrolysis, because the temperature is low, the intensification needs to absorb more heat, and the heat transfer difference in temperature is big, and higher wall temperature can lead to the coking, and high temperature can lead to the productivity of oil to reduce simultaneously, consequently adopts lower wall temperature to make the pyrolysis rate of micelle reach 93% ~ 95% in micelle pyrolysis spiral, then utilizes the temperature that carbon black degree of depth pyrolysis spiral slightly improved carbon black, and supplementary with high temperature nitrogen gas again, the oil gas of absorption on carbon black surface is got rid of to the high efficiency.
In order to further improve the quality of the carbon black, a high-temperature nitrogen port 8 is arranged at the second pyrolytic carbon black outlet 502 of the carbon black deep pyrolysis spiral 5, and the flow direction of the nitrogen is opposite to the conveying direction of the pyrolytic carbon black. High temperature nitrogen gas can prevent oil gas cooling condensation, and the existence of nitrogen gas makes the interior pyrolysis tolerance of carbon black degree of depth pyrolysis spiral reduce simultaneously, prevents that pyrolysis gas from adsorbing on the carbon black surface after cooling to water-cooling spiral.
In order to meet the standard of environment-friendly carbon black, the toluene light transmittance index of the carbon black at the outlet of the cooling screw 6 is higher than 85%.
The embodiment also provides a method for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles, which comprises the following steps of:
1) adding colloidal particles into a stock bin;
2) starting a hot blast furnace, preheating the device, and purging with nitrogen;
3) starting a feeding screw to start feeding;
4) the load of the hot blast stove is adjusted to lead the temperature of the flue gas at the inlet of the colloidal particle pyrolysis spiral jacket to be 740 to 760 ℃, the temperature of the flue gas at the outlet of the jacket to be 560 to 580 ℃,
5) adjusting a valve on a flue gas pipeline of the carbon black deep pyrolysis spiral to ensure that the temperature of a flue gas inlet of the carbon black deep pyrolysis spiral is 550-570 ℃.
6) The pyrolysis gas is extracted under negative pressure and condensed;
7) introducing heated nitrogen into the high-temperature nitrogen port, wherein the temperature of the nitrogen is 430-450 ℃;
8) the pyrolytic carbon black is cooled and discharged
In order to control the quality of the carbon black, the temperature of the colloidal particle pyrolysis spiral and the temperature of the carbon black deep pyrolysis spiral can be independently adjusted, the temperature of the carbon black at an outlet of the carbon black deep pyrolysis spiral pyrolysis carbon black is controlled to be 420-440 ℃, and the nitrogen flow at a high-temperature nitrogen port is 0.5-1 Nm3/h。
In order to reduce a pyrolysis gas outlet, a small amount of pyrolysis gas and high-temperature nitrogen generated by the carbon black deep pyrolysis spiral are opposite to the movement direction of the carbon black and are discharged from a pyrolysis gas outlet of the colloidal particle pyrolysis spiral.
By applying the device and the method provided by the invention, other main parameters are unchanged, the temperature of the smoke at the spiral inlet for deep pyrolysis of the carbon black is changed, the change of the light transmittance of the toluene of the carbon black is shown in figure 2, the light transmittance of the toluene of the carbon black is obviously increased along with the rise of the temperature, and the light transmittance of the toluene of the carbon black reaches 72.3% when the temperature of the smoke at the spiral inlet for deep pyrolysis of the carbon black reaches 540 ℃. Meanwhile, the temperature of the flue gas at the deep pyrolysis spiral inlet of the carbon black is kept unchanged at 540 ℃, and a high-temperature nitrogen port is supplemented with 0.6Nm3When the nitrogen is used for the reaction, the light transmittance of the carbon black toluene is increased from 72.3 percent to 81.5 percent, which shows that the high-temperature nitrogen purging reduces the deep heat of the carbon blackThe decomposition of the spiral internal pyrolysis gas is beneficial to improving the light transmittance of the carbon black toluene. When the temperature of the flue gas at the deep pyrolysis spiral inlet of the carbon black is increased to 560 ℃, the light transmittance of the toluene of the carbon black is 92.9 percent. The parameters of the environment-friendly carbon black prepared by the device and the method are shown in the table 1.
TABLE 1
In order to obtain the environment-friendly carbon black with stable parameters, the temperature of the main temperature measuring points of the device of the invention stably operates and changes with time as shown in figure 3, and the temperature fluctuation of each main temperature measuring point is within 5 ℃.
The embodiments described above are intended to illustrate the technical solutions and advantages of the present invention, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, additions and equivalents made within the scope of the principles of the present invention should be included in the scope of the present invention.
Claims (9)
1. The device for preparing the environment-friendly carbon black by pyrolyzing the rubber particles of the waste tire is characterized by comprising a support (1) and a hot blast stove (701), wherein a feeding screw (3), a rubber particle pyrolysis screw (4), a carbon black deep pyrolysis screw (5) and a cooling screw (6) are fixed on the support (1);
the feeding screw (3) comprises a horizontal screw (301) and a vertical screw (302) which are connected with each other, and a bin (2) for storing and supplying colloidal particles is arranged on the horizontal screw (301); the colloidal particles are extruded and fed by a horizontal screw (301) and a vertical screw (302) in sequence and then enter a colloidal particle pyrolysis screw (4);
the input end of the colloidal particle pyrolysis spiral (4) is provided with a central flue gas inlet (406), and the output end of the colloidal particle pyrolysis spiral is provided with a central flue gas outlet (407); a pyrolysis spiral sheet (408) is arranged inside the colloidal particle pyrolysis spiral (4), a colloidal particle inlet (401) is formed in the upper side wall of the colloidal particle pyrolysis spiral (4) close to the input end, a jacket flue gas inlet (404) is formed in the lower side wall of the colloidal particle pyrolysis spiral (4) close to the input end, and the colloidal particle inlet (401) is communicated with the lower end of the vertical spiral; the upper side wall of the colloidal particle pyrolysis spiral (4) close to the output end is provided with a pyrolysis gas outlet (402), and the lower side wall of the colloidal particle pyrolysis spiral (4) close to the output end is provided with a first pyrolysis carbon black outlet (403) and a jacket flue gas outlet (405); the jacket flue gas outlet (405) is communicated with the central flue gas inlet (406);
a conveying screw (505) is arranged inside the carbon black deep pyrolysis screw (5), the input end of the carbon black deep pyrolysis screw (5) is provided with a pyrolysis carbon black inlet (501) and a flue gas inlet (503), and the output end of the carbon black deep pyrolysis screw is provided with a second pyrolysis carbon black outlet (502) and a flue gas outlet (504); the pyrolytic carbon black inlet (501) is communicated with the first pyrolytic carbon black outlet (403);
the inlet end of the cooling screw (6) is connected with a second pyrolytic carbon black outlet (502) and is used for reducing the temperature of the carbon black;
the output end of the hot blast stove (701) is provided with a tee joint (702) which is respectively communicated with a jacket flue gas inlet (404) and a flue gas inlet (503) through flue gas pipelines and is used for providing heat for the colloidal particle pyrolysis spiral (4) and the carbon black deep pyrolysis spiral (5); and a flue gas pipeline communicated with the flue gas inlet (503) is provided with a regulating valve.
2. The apparatus for preparing environment friendly carbon black by pyrolysis of waste tire crumb particles according to claim 1, wherein a high temperature nitrogen port (8) is provided at the second pyrolysis carbon black outlet (502) of the deep pyrolysis spiral (5) of carbon black, and the flow direction of nitrogen gas is opposite to the conveying direction of pyrolysis carbon black.
3. The device for preparing the environment-friendly carbon black by pyrolyzing the waste tire rubber particles according to claim 1, wherein temperature measuring points are arranged at a jacket flue gas inlet (404), a jacket flue gas outlet (405), a central flue gas inlet (406), a central flue gas outlet (407) of the rubber particle pyrolysis spiral (4) and a flue gas inlet (503) of the carbon black deep pyrolysis spiral (5).
4. The device for preparing the environment-friendly carbon black by pyrolyzing the waste tire rubber particles according to claim 1, wherein the flue gas inlet (503) is arranged at the lower part of the input end of the carbon black deep pyrolysis spiral (5), and the flue gas entering the flue gas inlet (503) is mixed flue gas of a hot blast stove (701) and a central flue gas outlet (407).
5. The device for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles according to claim 1, wherein the pyrolysis rate of the rubber particles in the rubber particle pyrolysis spiral (4) is 93-95%, and the rotation speed of the rubber particle pyrolysis spiral (4) is controlled to ensure that the treatment capacity is 55-60% of the maximum conveying capacity in a cold state without heating at the same rotation speed.
6. The apparatus for preparing environment-friendly carbon black by pyrolyzing scrap tire rubber particles according to claim 1, wherein one end of the cooling screw (6) is provided with a carbon black inlet (601) and a cooling water inlet (603), the other end is provided with a cold carbon black outlet (602) and a cooling water outlet (604), and the carbon black inlet (601) is communicated with the second pyrolytic carbon black outlet (502).
7. A method for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles is characterized in that the device for preparing the environment-friendly carbon black by pyrolyzing the waste tire rubber particles in any one of claims 1 to 6 is adopted, and comprises the following steps:
step 1, adding colloidal particles into a stock bin;
step 2, starting the hot blast stove, preheating the device, and purging with nitrogen;
step 3, starting a feeding screw to start feeding;
step 4, adjusting the load of the hot blast stove to ensure that the flue gas temperature of the flue gas inlet of the upper jacket of the colloidal particle pyrolysis spiral is 740-760 ℃, and the flue gas temperature of the flue gas outlet of the jacket is 560-580 ℃;
step 5, adjusting an adjusting valve on a flue gas pipeline between the hot blast stove and the flue gas inlet to ensure that the temperature of the flue gas inlet of the carbon black deep pyrolysis spiral is 550-570 ℃;
step 6, pumping out and condensing the pyrolysis gas of the carbon black deep pyrolysis spiral under negative pressure;
step 7, introducing heated nitrogen into a high-temperature nitrogen port, wherein the temperature of the nitrogen is 430-450 ℃;
and 8, cooling and discharging the pyrolytic carbon black from a cold carbon black outlet of the cooling screw.
8. The method for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles according to claim 7, wherein in the step 5, the temperature of the carbon black at the outlet of the second pyrolytic carbon black on the carbon black deep pyrolysis screw is controlled to be 420-440 ℃, and the nitrogen flow at the high-temperature nitrogen port is 0.5-1 Nm3/h。
9. The method for preparing environment-friendly carbon black by pyrolyzing scrap tire rubber particles according to claim 7, wherein in step 6, a small amount of pyrolysis gas and high-temperature nitrogen gas generated by the deep pyrolysis spiral of the carbon black are discharged from the pyrolysis gas outlet of the pyrolysis spiral of the rubber particles in a direction opposite to the movement direction of the carbon black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110979194.4A CN113717550B (en) | 2021-08-25 | 2021-08-25 | Device and method for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110979194.4A CN113717550B (en) | 2021-08-25 | 2021-08-25 | Device and method for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113717550A CN113717550A (en) | 2021-11-30 |
| CN113717550B true CN113717550B (en) | 2022-07-15 |
Family
ID=78677698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110979194.4A Active CN113717550B (en) | 2021-08-25 | 2021-08-25 | Device and method for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113717550B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115895706B (en) * | 2022-12-16 | 2023-09-01 | 浙江大学 | Waste organic polymer particle pyrolysis system for improving pyrolysis oil quality |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618305A (en) * | 2012-03-31 | 2012-08-01 | 赵旭荣 | Waste pyrolysis screw feed pump for household garbage and waste tires |
| KR101651618B1 (en) * | 2014-10-28 | 2016-08-29 | 한국생산기술연구원 | Purifying method for yielding high-caliber carbon black from waste tire |
| CN104789254B (en) * | 2015-03-25 | 2016-04-13 | 洛阳瑞泽石化工程有限公司 | A kind of junked tire micelle cracking apparatus and cracking technology thereof |
| CN204490811U (en) * | 2015-03-25 | 2015-07-22 | 洛阳瑞泽石化工程有限公司 | A kind of junked tire micelle cracking apparatus |
| AU2016250908B2 (en) * | 2015-04-20 | 2019-11-21 | Rainbow Bee Eater Ip Pty Ltd | Pyrolysis apparatus and method |
| CN105754628B (en) * | 2016-05-19 | 2018-08-21 | 神雾科技集团股份有限公司 | A kind of pyrolysis of waste tire and cracking tube cracking system |
| CN106367098B (en) * | 2016-11-16 | 2018-08-24 | 武汉科技大学 | A kind of waste old continuous cracking reactor |
| CN207391343U (en) * | 2017-09-05 | 2018-05-22 | 柳州淦源环保科技有限公司 | The black system of a kind of high temperature pyrolysis reaction device and waste tire pyrolysis oil preparation, charcoal processing |
| CN107384458B (en) * | 2017-09-05 | 2023-09-29 | 柳州淦源环保科技有限公司 | System and method for preparing oil and carbon black by pyrolysis of waste tires through high-temperature pyrolysis reactor |
| KR20190092024A (en) * | 2018-01-30 | 2019-08-07 | 연세대학교 원주산학협력단 | The waste tire fast pyrolysis device with mixing and Heating Screw and pyrolysis method using it |
| CN108441242B (en) * | 2018-05-23 | 2020-04-24 | 青岛伊克斯达智能装备有限公司 | Spiral exhaust type continuous feeding device and method for waste tire thermal cracking |
| CN208199602U (en) * | 2018-05-28 | 2018-12-07 | 青岛伊克斯达智能装备有限公司 | The continuous output device of choke and waste tire thermal splitting system for solid material |
| CN109096798B (en) * | 2018-08-24 | 2020-10-20 | 大连理工大学 | Micro-oxidation activation method for waste tire pyrolytic carbon black |
| CN110591417A (en) * | 2019-10-09 | 2019-12-20 | 北京克林泰尔环保科技有限公司 | Continuous feeding and granulating device for waste tire cracking carbon black |
| CN211522119U (en) * | 2019-12-19 | 2020-09-18 | 阳光机电（寿光）有限公司 | Continuous cracking equipment for whole waste tire |
| TWM595733U (en) * | 2020-02-15 | 2020-05-21 | 林酉亮 | Improved thermal cracking equipment |
| CN212532869U (en) * | 2020-07-02 | 2021-02-12 | 上海电气电站环保工程有限公司 | Integrated fixed bed reactor for co-pyrolysis of biomass and waste plastic |
| CN111676042B (en) * | 2020-07-13 | 2024-08-20 | 浙江大学 | Continuous thermal cracking treatment method |
| CN112080296B (en) * | 2020-10-08 | 2021-12-21 | 黄锋艳 | Process system for preparing pyrolysis oil gas from waste tires |
| CN112662419B (en) * | 2020-12-09 | 2023-10-03 | 浙江大学 | Device and method for rapid pyrolysis, quality improvement and value increase of waste rubber and plastic particles |
| CN112760117A (en) * | 2020-12-09 | 2021-05-07 | 浙江大学 | Waste rubber and plastic high-efficiency pyrolysis device with heat transfer enhanced coupling grinding function |
-
2021
- 2021-08-25 CN CN202110979194.4A patent/CN113717550B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113717550A (en) | 2021-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101544901B (en) | Method and device for preparing biological oil by biomass cracking | |
| CN204490811U (en) | A kind of junked tire micelle cracking apparatus | |
| CN104789254B (en) | A kind of junked tire micelle cracking apparatus and cracking technology thereof | |
| CN101985558B (en) | Coal decomposing equipment | |
| CN100340637C (en) | Mobile biomass liquefaction system | |
| CN1730177A (en) | Biomass pyrolysis liquefied technique and double tower apparatus system thereof | |
| CN101985564B (en) | Vertical coal decomposing equipment | |
| CN113717550B (en) | Device and method for preparing environment-friendly carbon black by pyrolyzing waste tire rubber particles | |
| CN105400528A (en) | Rapid rice husk pyrolysis apparatus and matching system thereof | |
| CN205328941U (en) | Pyrolysis equipment | |
| CN102585912B (en) | Method for continuous industrial production of coal gas by multi-chamber microwave heating | |
| CN103173238B (en) | Thermal pyrolysis method for Fischer-Tropsch synthesis reaction wax residue | |
| CN205803398U (en) | A kind of low order fine coal hydrogenation pressurization fast low temperature destructive distillation device | |
| CN105885951B (en) | A kind of double bed coupling pyrolysis gasification system directly or indirectly heating combination | |
| CN112126472A (en) | Biomass pyrolysis gasification rotary furnace equipment | |
| CN107267176A (en) | A kind of efficient biomass handles tar multi-joint-production pyrolysis oven | |
| CN103215081A (en) | Comprehensive high-efficiency carbon gasification pyrolysis equipment for biomass compact forming grains | |
| CN106010610A (en) | Low-order pulverized coal hydrogenated and pressurized fast low-temperature carbonization process and device | |
| CN104726118A (en) | Low-rank pulverized coal pyrolysis and semicoke gasification composite process system | |
| CN108865204A (en) | A kind of apparatus and method of recirculating fluidized bed fine coal high pressure thermal transition volume increase tar | |
| CN205328940U (en) | System for pyrolysis coal | |
| CN201729799U (en) | Vertical coal decomposition device with horizontal insertion gas pipe | |
| CN212833623U (en) | Pyrolysis gas recycling reaction device | |
| CN212610427U (en) | Organic matter pyrolysis device | |
| CN209778753U (en) | Continuous cracking equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 310018 No. 1, No. 1 Street, Qiantang District, Hangzhou, Zhejiang Applicant after: Zhongce Rubber Group Co.,Ltd. Applicant after: Zhejiang University Address before: 310018 No. 1, Baiyang street, Qiantang New District, Hangzhou, Zhejiang Applicant before: ZHONGCE RUBBER GROUP Co.,Ltd. Applicant before: Zhejiang University |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |