CN113528170A - Treatment method for waste tire cracking carbon black - Google Patents
Treatment method for waste tire cracking carbon black Download PDFInfo
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- CN113528170A CN113528170A CN202110626181.9A CN202110626181A CN113528170A CN 113528170 A CN113528170 A CN 113528170A CN 202110626181 A CN202110626181 A CN 202110626181A CN 113528170 A CN113528170 A CN 113528170A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/07—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of solid raw materials consisting of synthetic polymeric materials, e.g. tyres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B17/0206—Selectively separating reinforcements from matrix material by destroying the interface bound before disintegrating the matrix to particles or powder, e.g. from tires or belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B17/0412—Disintegrating plastics, e.g. by milling to large particles, e.g. beads, granules, flakes, slices
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- 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
- C09C1/50—Furnace black ; Preparation thereof
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/005—After-treatment of coke, e.g. calcination desulfurization
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/02—Multi-step carbonising or coking processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The invention discloses a method for treating waste tire pyrolysis carbon black, which belongs to the technical field of waste tire recycling and comprises the following steps: s1, putting the waste tires into an extrusion device, destroying the main body mechanism of the waste tires, and obtaining broken rubber blocks of the waste tires and separated steel wires; s2, carrying out secondary crushing on the crushed rubber blocks obtained in the previous step through a crushing device, and crushing the rubber blocks into rubber particles with the diameter of 3-4 cm; s3, putting the rubber particles obtained in the previous step into a cleaning device for cleaning, and filtering by a filter screen to remove impurities doped in the rubber particles; s4, putting the rubber particles in the previous step into a sealed solution tank, and dissolving the rubber particles in the sealed solution tank.
Description
Technical Field
The invention belongs to the technical field of waste tire recycling, and particularly relates to a treatment method for waste tire cracking carbon black.
Background
With the development of industrial and modern civilization, the treatment of various industrial and domestic wastes has become a big problem. The waste rubber is one kind of solid waste, and the main source is waste rubber products and leftover materials in the production process of the rubber products, and the quantity of the waste rubber products and the leftover materials is second to that of waste high polymer materials and is second to waste plastics.
The waste tires are used as garbage to be burned, buried or idle and piled up. The method not only occupies land resources, releases harmful substances to the environment and pollutes soil and underground water, but also can not recycle valuable resources such as rubber elastomers, fabrics, polyesters, metals and the like contained in rubber wastes, thereby causing huge resource waste.
China is the largest rubber consumer country in the world, and the consumption scale of China continuously occupies the first place of the world for many years. Meanwhile, China is a country with extremely deficient rubber resources, more than 75% of natural rubber and more than 40% of synthetic rubber are imported each year, and the overall external dependence of rubber resources exceeds 70%.
Waste tires are a renewable resource. The used tire can be continuously used through retreading; the waste tire can be changed into valuables by producing the reclaimed rubber, the rubber powder and other utilization modes.
In the prior art, a large amount of pollutants which affect the environment, such as waste water, waste gas, waste residues, dioxin and the like, are generated in the process of recycling and cracking waste tires, and how to solve or reduce the pollutants generated in the cracking process is a main discussion problem in the cracking process of the waste tires.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for treating waste tire cracking carbon black, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a treatment method for waste tire cracking carbon black comprises the following steps:
s1, putting the waste tires into an extrusion device, destroying the main body mechanism of the waste tires, and obtaining broken rubber blocks of the waste tires and separated steel wires;
s2, carrying out secondary crushing on the crushed rubber blocks obtained in the previous step through a crushing device, and crushing the rubber blocks into rubber particles with the diameter of 3-4 cm;
s3, putting the rubber particles obtained in the previous step into a cleaning device for cleaning, and filtering by a filter screen to remove impurities doped in the rubber particles;
s4, putting the rubber particles in the previous step into a sealed solution tank, and dissolving the rubber particles in the sealed solution tank;
s5, conveying the rubber particles into a high-temperature cracking device, wherein the high-temperature cracking device adopts a high-temperature cracking furnace with a rotary furnace structure, and hollow heating balls are added into the high-temperature cracking device;
s6, after cracking for 2 hours, heating the internal temperature of the pyrolysis device to 200-450 ℃;
s7, after the temperature is raised, the pyrolysis device performs oil production for 8 hours, the produced pyrolysis oil is stored in an oil storage tank, and waste gas and waste water generated in the process are purified;
and S8, after the oil production work is finished, cooling the waste tires by a condensation cooling system of the high-temperature cracking device for 8 hours, and discharging the solid materials after cooling to finish the cracking process of the waste tires.
Further optimizing the technical scheme, in the step S1, the steel wire obtained after the repeated rolling of the extrusion roller in the extrusion equipment is recycled by the magnet equipment for other purposes.
Further optimize this technical scheme, in S4, add in the sealed solution jar and have the isoamyl acetate solvent, the isoamyl acetate solvent is dissolved rubber particle with higher speed, the sealed solution jar is sealed with the cracker and is communicated, transports the rubber particle after dissolving to the cracker and carries out the schizolysis work.
Further optimizing the technical scheme, the isoamyl acetate solvent is collected after being volatilized and the isoamyl acetate gas is cooled for recycling, and the next accelerated dissolution work of the rubber particles is carried out.
Further optimizing the technical scheme, in the step S5, the hollow heating ball is designed by adopting a stainless steel material, hot molten salt is filled in the hollow heating ball, the diameter of the hollow heating ball is 2cm, and the total volume ratio of the hollow heating ball to the rubber particles is 2: 3.
Further optimizing the technical solution, in S7, the exhaust gas generated in the period includes non-condensable gas and flue gas, and the purification treatment of the exhaust gas generated in the period includes the following specific contents: collecting the non-condensable gas containing the sulfur component for a back combustion treatment, and conveying the non-condensable gas containing the sulfur component to a combustion chamber through a water-sealed tank, a flame arrester and a combustion nozzle for full and complete combustion; and carrying out wet dust removal atomization on the flue gas containing sulfur components in a desulfurization and dust removal tower, wherein an atomization agent in the desulfurization and dust removal tower adopts gypsum aqueous solution.
Further optimizing the technical scheme, in S7, the waste water generated in the period includes waste water in a water-sealed tank and waste water in a desulfurization and dust removal tower, and the purification treatment of the waste gas generated in the period includes the following specific contents: completely recycling the wastewater in the water-sealed tank, adding weak alkali liquor after recycling, and neutralizing the wastewater for a desulfurization and dust removal tower; and (3) completely recovering the wastewater in the desulfurization and dust removal tower, filtering a mixture of calcium hydroxide, calcium sulfide and calcium sulfite in the wastewater, and recycling the filtered water.
In step S7, after filtering the mixture of calcium hydroxide, calcium sulfide, and calcium sulfite in the wastewater, the collected mixture of calcium hydroxide, calcium sulfide, and calcium sulfite is subjected to filter pressing and drying, and then is used for roadbed filling or other buildings.
Further optimizing the technical scheme, the temperature in the cracking process of the high-temperature cracking device is controlled at 200-450 ℃, and the interior of the high-temperature cracking device in the cracking process is in an oxygen-deficient environment.
Further optimizing the technical scheme, the combustion temperature of a combustion chamber in the high-temperature cracking device is controlled to be more than 1100 ℃, and because the waste tires do not contain a catalyst containing metal cations, the generation amount of dioxin in the treatment method for cracking the carbon black by the waste tires can be ignored.
Compared with the prior art, the invention provides a treatment method for waste tire cracking carbon black, which has the following beneficial effects:
1. according to the method for treating the waste tire pyrolysis carbon black, the waste tire is pretreated in multiple steps before pyrolysis treatment, so that the method is beneficial to directly extracting and recovering substances with recovery values such as steel wires and the like, can prevent impurities from influencing the pyrolysis process, prevents the problem of value reduction caused by impurity doping, and improves the feasibility of the method for treating the waste tire pyrolysis carbon black.
2. According to the method for treating the waste tire pyrolysis carbon black, the hollow heating balls with higher temperature are directly contacted with the rubber particles by adding the hollow heating balls, so that the dissolution of the rubber particles is accelerated, the processing efficiency of the method for treating the waste tire pyrolysis carbon black is improved, and the processing time of the method for treating the waste tire pyrolysis carbon black is shortened.
3. According to the method for treating the waste tire cracking carbon black, the waste gas, the waste water and the waste residues generated in each cracking link are purified, and the purified waste gas, the waste water and the waste residues are recycled or recycled for other purposes, so that the pollution problem generated in the waste tire cracking process is solved, the energy is saved, the environment is protected, and the method for treating the waste tire cracking carbon black is favorable for large-scale popularization.
Drawings
FIG. 1 is a schematic flow chart of a treatment method for waste tire cracked carbon black according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, a method for processing waste tire cracked carbon black includes the following steps:
s1, putting the waste tires into an extrusion device, destroying the main body mechanism of the waste tires, and obtaining broken rubber blocks of the waste tires and separated steel wires;
s2, carrying out secondary crushing on the crushed rubber blocks obtained in the previous step through a crushing device, and crushing the rubber blocks into rubber particles with the diameter of 3-4 cm;
s3, putting the rubber particles obtained in the previous step into a cleaning device for cleaning, and filtering by a filter screen to remove impurities doped in the rubber particles;
s4, putting the rubber particles in the previous step into a sealed solution tank, and dissolving the rubber particles in the sealed solution tank, wherein the amount of the rubber particles put into the sealed solution tank is 5 tons;
s5, conveying the rubber particles into a high-temperature cracking device, and adding hollow heating balls into the high-temperature cracking device;
s6, after cracking for 1 hour, heating the internal temperature of the pyrolysis device to 200-450 ℃;
s7, after the temperature is raised, the pyrolysis device performs oil production for 4 hours, the produced pyrolysis oil is stored in an oil storage tank, and waste gas and waste water generated in the process are purified;
and S8, after the oil production work is finished, cooling the waste tires by a condensation cooling system of the high-temperature cracking device for 4 hours, and discharging the solid materials after cooling to finish the cracking process of the waste tires.
Specifically, in S1, the steel wire obtained by repeatedly rolling the steel wire by the pressing roller of the pressing device is recovered by the magnet device for another use. The waste tire is pretreated in multiple steps before cracking treatment, so that the method is beneficial to directly extracting and recovering materials with recovery value such as steel wires and the like, can prevent impurities from influencing the cracking process, prevents the problem of value reduction caused by impurity doping, and improves the feasibility of the treatment method for the waste tire cracking carbon black.
Specifically, in S4, the isoamyl acetate solvent is added into the sealed solution tank, the isoamyl acetate solvent accelerates the dissolution of the rubber particles, the sealed solution tank is communicated with the cracking device in a sealing manner, and the dissolved rubber particles are transmitted to the cracking device for cracking.
Specifically, the isoamyl acetate solvent is collected after cooling of the isoamyl acetate gas after volatilization for recycling, and the next accelerated dissolution work of the rubber particles is carried out.
Specifically, in S5, the hollow heating ball is designed using a stainless steel material, the hollow heating ball is filled with hot molten salt, the diameter of the hollow heating ball is 2cm, and the total volume ratio of the hollow heating ball to the rubber particles is 2: 3. By adding the hollow heating balls, the hollow heating balls with higher temperature directly contact with the rubber particles, so that the dissolution of the rubber particles is accelerated, the processing efficiency of the processing method for the waste tire pyrolysis carbon black is improved, and the processing time of the processing method for the waste tire pyrolysis carbon black is shortened.
Specifically, in S7, the exhaust gas generated in the period includes non-condensable gas and flue gas, and the purification treatment of the exhaust gas generated in the period includes the following specific contents: the non-condensable gas containing the sulfur component is collected for the back combustion treatment, and is transmitted into the combustion chamber through the water seal tank, the flame arrester and the combustion nozzle for full and complete combustion, so that a large amount of fuel is saved while air pollution is prevented, and energy is saved; and carrying out wet dust removal atomization on the flue gas containing sulfur components in a desulfurization and dust removal tower, wherein an atomization agent in the desulfurization and dust removal tower adopts gypsum aqueous solution.
Specifically, in S7, the waste water generated in the process includes waste water in a water-sealed tank and waste water in a desulfurization and dust removal tower, and the purification treatment of the waste gas generated in the process includes the following specific contents: completely recycling the wastewater in the water-sealed tank, adding weak alkali liquor after recycling, and neutralizing the wastewater for a desulfurization and dust removal tower; and (3) completely recovering the wastewater in the desulfurization and dust removal tower, filtering a mixture of calcium hydroxide, calcium sulfide and calcium sulfite in the wastewater, and recycling the filtered water.
Specifically, in S7, after filtering the mixture of calcium hydroxide, calcium sulfide, and calcium sulfite in the wastewater, the collected mixture of calcium hydroxide, calcium sulfide, and calcium sulfite is subjected to filter pressing and drying, and then is used for roadbed filling or other construction.
Specifically, the temperature in the cracking process of the high-temperature cracking device is controlled at 200-450 ℃, and the interior of the high-temperature cracking device in the cracking process is in an oxygen-deficient environment.
Specifically, the combustion temperature of a combustion chamber in the pyrolysis device is controlled to be more than 1100 ℃, and because the waste tires do not contain a catalyst containing metal cations, the generation amount of dioxin in the treatment method for cracking the carbon black by the waste tires can be ignored. The waste gas, waste water and waste residue generated in each link of cracking are purified, and the purified waste gas, waste water and waste residue are recycled or recycled for other use, so that the pollution problem generated in the cracking process of the waste tires is solved, the energy is saved, the environment is protected, and the method for treating the waste tire cracking carbon black is favorable for large-scale popularization.
Example two:
a treatment method for waste tire cracking carbon black comprises the following steps:
s1, putting the waste tires into an extrusion device, destroying the main body mechanism of the waste tires, and obtaining broken rubber blocks of the waste tires and separated steel wires;
s2, carrying out secondary crushing on the crushed rubber blocks obtained in the previous step through a crushing device, and crushing the rubber blocks into rubber particles with the diameter of 3-4 cm;
s3, putting the rubber particles obtained in the previous step into a cleaning device for cleaning, and filtering by a filter screen to remove impurities doped in the rubber particles;
s4, putting the rubber particles in the previous step into a sealed solution tank, and dissolving the rubber particles in the sealed solution tank, wherein the amount of the rubber particles put into the sealed solution tank is 10 tons;
s5, conveying the rubber particles to a high-temperature cracking device, wherein the high-temperature cracking device adopts a high-temperature cracking furnace with a rotary furnace structure, increases the heat transfer area, slowly rotates, is uniformly heated, and avoids local overheating. The pyrolysis effect is good, the pyrolysis efficiency is improved, and hollow heating balls are added into the high-temperature pyrolysis device;
s6, after cracking for 2 hours, heating the internal temperature of the pyrolysis device to 200-450 ℃;
s7, after the temperature is raised, the pyrolysis device performs oil production for 8 hours, the produced pyrolysis oil is stored in an oil storage tank, and waste gas and waste water generated in the process are purified;
and S8, after the oil production work is finished, cooling the waste tires by a condensation cooling system of the high-temperature cracking device for 8 hours, and discharging the solid materials after cooling to finish the cracking process of the waste tires.
Specifically, in S1, the steel wire obtained by repeatedly rolling the steel wire by the pressing roller of the pressing device is recovered by the magnet device for another use. The waste tire is pretreated in multiple steps before cracking treatment, so that the method is beneficial to directly extracting and recovering materials with recovery value such as steel wires and the like, can prevent impurities from influencing the cracking process, prevents the problem of value reduction caused by impurity doping, and improves the feasibility of the treatment method for the waste tire cracking carbon black.
Specifically, in S4, the isoamyl acetate solvent is added into the sealed solution tank, the isoamyl acetate solvent accelerates the dissolution of the rubber particles, the sealed solution tank is communicated with the cracking device in a sealing manner, and the dissolved rubber particles are transmitted to the cracking device for cracking.
Specifically, the isoamyl acetate solvent is collected after cooling of the isoamyl acetate gas after volatilization for recycling, and the next accelerated dissolution work of the rubber particles is carried out.
Specifically, in S5, the hollow heating ball is designed using a stainless steel material, the hollow heating ball is filled with hot molten salt, the diameter of the hollow heating ball is 2cm, and the total volume ratio of the hollow heating ball to the rubber particles is 2: 3. By adding the hollow heating balls, the hollow heating balls with higher temperature directly contact with the rubber particles, so that the dissolution of the rubber particles is accelerated, the processing efficiency of the processing method for the waste tire pyrolysis carbon black is improved, and the processing time of the processing method for the waste tire pyrolysis carbon black is shortened.
Specifically, in S7, the exhaust gas generated in the period includes non-condensable gas and flue gas, and the purification treatment of the exhaust gas generated in the period includes the following specific contents: collecting the non-condensable gas containing the sulfur component for a back combustion treatment, and conveying the non-condensable gas containing the sulfur component to a combustion chamber through a water-sealed tank, a flame arrester and a combustion nozzle for full and complete combustion; and carrying out wet dust removal atomization on the flue gas containing sulfur components in a desulfurization and dust removal tower, wherein an atomization agent in the desulfurization and dust removal tower adopts gypsum aqueous solution.
Specifically, in S7, the waste water generated in the process includes waste water in a water-sealed tank and waste water in a desulfurization and dust removal tower, and the purification treatment of the waste gas generated in the process includes the following specific contents: completely recycling the wastewater in the water-sealed tank, adding weak alkali liquor after recycling, and neutralizing the wastewater for a desulfurization and dust removal tower; and (3) completely recovering the wastewater in the desulfurization and dust removal tower, filtering a mixture of calcium hydroxide, calcium sulfide and calcium sulfite in the wastewater, and recycling the filtered water. About 50 kg of waste water is generated when 3 tons of pyrolysis oil is produced by using waste tires, and the waste water is neutralized by adding weak alkali liquor, and then the neutral waste water is filtered to achieve harmlessness and is used for a desulfurization dust removal tower.
Specifically, in S7, after filtering the mixture of calcium hydroxide, calcium sulfide, and calcium sulfite in the wastewater, the collected mixture of calcium hydroxide, calcium sulfide, and calcium sulfite is subjected to filter pressing and drying, and then is used for roadbed filling or other construction.
Specifically, the temperature in the cracking process of the high-temperature cracking device is controlled at 200-450 ℃, and the interior of the high-temperature cracking device in the cracking process is in an oxygen-deficient environment.
Specifically, the combustion temperature of a combustion chamber in the pyrolysis device is controlled to be more than 1100 ℃ and higher than the generation temperature of dioxin, and because the waste tires do not contain a catalyst containing metal cations and do not contain organic or inorganic chlorine, the generation amount of dioxin in the treatment method for cracking carbon black by using the waste tires can be ignored. The waste gas, waste water and waste residue generated in each link of cracking are purified, and the purified waste gas, waste water and waste residue are recycled or recycled for other use, so that the pollution problem generated in the cracking process of the waste tires is solved, the energy is saved, the environment is protected, and the method for treating the waste tire cracking carbon black is favorable for large-scale popularization.
The invention has the beneficial effects that:
1. according to the method for treating the waste tire pyrolysis carbon black, the waste tire is pretreated in multiple steps before pyrolysis treatment, so that the method is beneficial to directly extracting and recovering substances with recovery values such as steel wires and the like, can prevent impurities from influencing the pyrolysis process, prevents the problem of value reduction caused by impurity doping, and improves the feasibility of the method for treating the waste tire pyrolysis carbon black.
2. According to the method for treating the waste tire pyrolysis carbon black, the hollow heating balls with higher temperature are directly contacted with the rubber particles by adding the hollow heating balls, so that the dissolution of the rubber particles is accelerated, the processing efficiency of the method for treating the waste tire pyrolysis carbon black is improved, and the processing time of the method for treating the waste tire pyrolysis carbon black is shortened.
3. According to the method for treating the waste tire cracking carbon black, the waste gas, the waste water and the waste residues generated in each cracking link are purified, and the purified waste gas, the waste water and the waste residues are recycled or recycled for other purposes, so that the pollution problem generated in the waste tire cracking process is solved, the energy is saved, the environment is protected, and the method for treating the waste tire cracking carbon black is favorable for large-scale popularization.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A treatment method for waste tire cracking carbon black is characterized by comprising the following steps:
s1, putting the waste tires into an extrusion device, destroying the main body mechanism of the waste tires, and obtaining broken rubber blocks of the waste tires and separated steel wires;
s2, carrying out secondary crushing on the crushed rubber blocks obtained in the previous step through a crushing device, and crushing the rubber blocks into rubber particles with the diameter of 3-4 cm;
s3, putting the rubber particles obtained in the previous step into a cleaning device for cleaning, and filtering by a filter screen to remove impurities doped in the rubber particles;
s4, putting the rubber particles in the previous step into a sealed solution tank, and dissolving the rubber particles in the sealed solution tank;
s5, conveying the rubber particles into a high-temperature cracking device, wherein the high-temperature cracking device adopts a high-temperature cracking furnace with a rotary furnace structure, and hollow heating balls are added into the high-temperature cracking device;
s6, after cracking for 2 hours, heating the internal temperature of the pyrolysis device to 200-450 ℃;
s7, after the temperature is raised, the pyrolysis device performs oil production for 8 hours, the produced pyrolysis oil is stored in an oil storage tank, and waste gas and waste water generated in the process are purified;
and S8, after the oil production work is finished, cooling the waste tires by a condensation cooling system of the high-temperature cracking device for 8 hours, and discharging the solid materials after cooling to finish the cracking process of the waste tires.
2. The method as claimed in claim 1, wherein in S1, the steel wire obtained by repeatedly rolling the extrusion roller in the extrusion device is recovered by a magnet device for other uses.
3. The method as claimed in claim 1, wherein in the step S4, isoamyl acetate solvent is added into a sealed solution tank, the isoamyl acetate solvent accelerates the dissolution of the rubber particles, the sealed solution tank is in sealed communication with the cracking device, and the dissolved rubber particles are transported to the cracking device for cracking.
4. The method as claimed in claim 3, wherein the isoamyl acetate solvent is collected after cooling of the isoamyl acetate gas after volatilization for recycling and next accelerated dissolution of rubber particles.
5. The method as claimed in claim 1, wherein in the step S5, the hollow heating ball is made of stainless steel material, the hollow heating ball is filled with hot molten salt, the diameter of the hollow heating ball is 2cm, and the total volume ratio of the hollow heating ball and the rubber particles is 2: 3.
6. The method for processing waste tire cracking carbon black according to claim 1, wherein in the step S7, the exhaust gas generated in the process includes non-condensable gas and flue gas, and the purification treatment of the exhaust gas generated in the process includes the following specific contents: collecting the non-condensable gas containing the sulfur component for a back combustion treatment, and conveying the non-condensable gas containing the sulfur component to a combustion chamber through a water-sealed tank, a flame arrester and a combustion nozzle for full and complete combustion; and carrying out wet dust removal atomization on the flue gas containing sulfur components in a desulfurization and dust removal tower, wherein an atomization agent in the desulfurization and dust removal tower adopts gypsum aqueous solution.
7. The method for processing carbon black from waste tires according to claim 1, wherein in S7, the waste water generated in the process includes waste water in a water-sealed tank and waste water in a desulfurization and dust removal tower, and the purification treatment of the waste gas generated in the process includes the following specific contents: completely recycling the wastewater in the water-sealed tank, adding weak alkali liquor after recycling, and neutralizing the wastewater for a desulfurization and dust removal tower; and (3) completely recovering the wastewater in the desulfurization and dust removal tower, filtering a mixture of calcium hydroxide, calcium sulfide and calcium sulfite in the wastewater, and recycling the filtered water.
8. The method as claimed in claim 7, wherein in the step S7, the mixture of calcium hydroxide, calcium sulfide and calcium sulfite in the wastewater is filtered, and the collected mixture of calcium hydroxide, calcium sulfide and calcium sulfite is dried by pressure filtration and used as roadbed filler or other construction.
9. The method as claimed in claim 1, wherein the temperature of the pyrolysis device is controlled at 200-450 ℃, and the inside of the pyrolysis device is in an oxygen-deficient environment.
10. The method as claimed in claim 1, wherein the combustion temperature of the combustor of the pyrolysis apparatus is controlled to be over 1100 ℃, and the amount of dioxin generated in the method for processing waste tire pyrolysis carbon black is negligible due to the absence of a catalyst containing metal cations in the waste tires.
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| CN117552145A (en) * | 2024-01-04 | 2024-02-13 | 昆山东利新材料科技有限公司 | Tire regenerated environment-friendly fabric and preparation method thereof |
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