Method for recycling processing waste gas generated by thermal cracking of waste tires

Abstract

The invention relates to the technical field of waste tire thermal cracking waste gas recovery, and particularly discloses a waste tire thermal cracking processing waste gas recycling method which comprises the following steps: S1, waste gas is guided into a primary filter through a pipeline, impurities in the gas are adsorbed through the primary filter, and carbon black is intercepted on the surface of a filter screen; then the carbon black on the surface of the filter screen is collected through a collecting device; and S2, gas is conveyed into a heat exchange system through primary filtration, waste gas is cooled through the heat exchange system, and meanwhile heat recovered by a heat exchange device can heat water. According to the waste tire thermal cracking processing waste gas recycling method, primary filtering is arranged, impurities in gas can be accurately adsorbed through a filter screen, carbon black is intercepted on the surface of the filter screen, then the carbon black is collected through a collecting device, the carbon black can be applied to multiple industries such as rubber products, printing ink and coatings, carbon black resources are effectively recycled, and the recycling effect is good. And resource waste is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of waste tire pyrolysis waste gas recovery, and specifically relates to a method for recycling and utilizing the processing waste gas of waste tire pyrolysis. Background Technique

[0002] Waste tires mainly consist of rubber, carbon black, steel wires, and a small amount of additives. At the same time, waste tire pyrolysis is a technology that converts waste tires into useful substances through high-temperature decomposition. The waste tires are heated to a certain temperature, usually 400 - 600 °C, to cause the high-molecular polymers in the tires to undergo pyrolysis reactions and break chemical bonds. At the same time, when waste tire pyrolysis is carried out, technologies such as pretreatment of tires, pyrolysis reactions, and separation and collection of products are required. First, pretreatment operations such as cleaning and cutting of waste tires are required to remove impurities, soil, etc. on the tire surface and cut the tires into appropriate sizes for subsequent feeding and processing. Then, the pyrolysis reaction is that the pretreated waste tires are sent into a pyrolysis reactor and heated under the condition of isolating air or introducing a small amount of inert gas. The benefits of waste tire pyrolysis are that it can convert waste tires into a variety of valuable resources. For example, pyrolysis oil can be used as fuel or chemical raw materials, carbon black can be used in industries such as rubber products, inks, and coatings, and steel wires can be recycled and reused, realizing the recycling of resources and reducing environmental pollution. It can reduce the occupation of land by tires. Waste tires are large in volume, and pyrolysis treatment can effectively reduce the stock of waste tires and reduce the occupation of land resources;

[0003] At the same time, when waste tire pyrolysis is carried out, a waste gas recovery and utilization method is required. Waste gas recovery and utilization can bring benefits such as reducing pollutant emissions and resource conservation. However, during use, the waste gas generated by waste tire pyrolysis cannot be recovered more effectively, and the recovery efficiency is low, which easily leads to waste of resources. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for recycling and utilizing the processing waste gas of waste tire pyrolysis to solve the problem in the above background technique that the waste gas generated by waste tire pyrolysis cannot be recovered more effectively, the recovery efficiency is low, and it easily leads to waste of resources.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A method for recycling and utilizing the processing waste gas of waste tire pyrolysis, including the following steps:

[0006] S1: Guide the waste gas to the inside of the primary filter through a pipeline, adsorb the impurities inside the gas through the primary filter, intercept the carbon black on the surface of the filter screen, and then collect the carbon black on the surface of the filter screen through a collection device;

[0007] S2: The primary filtration transfers the gas into the heat exchange system. The waste gas is cooled by the heat exchange system. Meanwhile, the heat recovered by the heat exchange device can heat the water. The gas temperature is detected by the induction device. When the induction device detects that the temperature is too high, it guides the gas to the opening of the heat exchange system for re-heat exchange. At the same time, pollutants such as benzene, toluene, and xylene generated by the heat exchange system can be purified by the separation system.

[0008] S3: The heat exchange system allows the waste gas to enter the inside of the condensation system. The waste gas is decomposed by the condensation system, and pollutants such as benzene, toluene, and xylene generated by the decomposition are collected and purified by the separation system.

[0009] S4: The condensation system transfers the finally unreacted waste gas into the microbial treatment system. The waste gas is brought into full contact with the solution inside the microbial treatment system, and the pollutants inside the waste gas are absorbed and decomposed by the microorganisms in the biological filter.

[0010] Preferably, the waste gas enters the primary filtration through a pipeline. The waste gas first contacts the filter screen, and the filter screen adsorbs the carbon black. After a certain period of time, the carbon black on the surface of the filter screen is collected by the collection device.

[0011] Preferably, the primary filtration is connected to the heat exchange system through a pipeline, and the primary filtration includes: a filtration device and a collection device;

[0012] Filtration device: It can filter the gas inside.

[0013] Collection device: It cleans the surface of the filter screen.

[0014] Preferably, the inside of the heat exchange system includes: a heat exchanger and a temperature sensor. The two ends of the heat exchanger are respectively inside the primary filtration and the condensation tower. The gas enters the heat exchanger, and heat is transferred through the heat exchanger. At the same time, the heat exchanger transfers the heat to the inside of the tire processing to heat the tire processing steps.

[0015] Preferably, the temperature sensor is installed at the end of the heat exchanger. The temperature sensor is set to a critical value. When the temperature of the waste gas passing through the heat exchange system is higher than the critical value, the waste gas returns to the opening of the heat exchange system for re-heat exchange. When the temperature of the waste gas passing through the heat exchange system is lower than the critical value, the waste gas is transferred through a pipeline to the inside of the condensation tower.

[0016] Preferably, the condensation system includes a condensation tower, a separation system, and a collection device. At the same time, both ends of the condensation tower are respectively connected to the biological filter through the heat exchange system, so that the waste gas enters the interior of the condensation tower. The condensation tower cools the waste gas, condenses the organic pollutants into a liquid, and the condensation tower is connected to the separation system through the collection device. The collection device collects pollutants such as benzene, toluene, and xylene in the condensation tower and transfers them to the interior of the separation system through the collection device.

[0017] Preferably, the separation system in S3 includes devices such as distillation, extraction, and rectification, and the separation system treats pollutants such as benzene, toluene, and xylene.

[0018] The interior of the microbial treatment system includes a biological filter. The biological filter is connected to the condensation tower through a pipeline. The waste gas contacts the filter material layer placed inside the biological filter, and the waste gas contacts the microorganisms attached to the surface of the filter material. The condensation tower transfers the unreacted gas to the microbial treatment system.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The method for recycling the processing waste gas of waste tire pyrolysis:

[0020] 1. A primary filter is set up. The filter screen can accurately adsorb impurities in the gas, and the carbon black is retained on the surface of the filter screen. Subsequently, the collection device is used to collect the carbon black, which can be applied to multiple industries such as rubber products, inks, and coatings. The effective recovery of carbon black resources avoids resource waste.

[0021] 2. A heat exchange system is set up. While cooling the waste gas, the heat exchange system transfers the recovered heat to the interior of the tire processing link for heating, realizing the transfer of heat, providing heat support for the tire processing process, reducing additional energy consumption, and enabling the recycling of energy, making the method more energy-saving and emission-reducing.

[0022] 3. A condensation system is set up. The condensation system can decompose the waste gas, collect pollutants such as benzene, toluene, and xylene in the waste gas, and purify them through a separation system such as distillation, extraction, and rectification, enabling the effective recovery and utilization of these organic pollutants.

[0023] 4. A microbial treatment system is set up. When the remaining waste gas is input into the biological filter, the microorganisms inside will absorb and decompose the residual pollutants in the waste gas, such as hydrocarbons, alcohols, esters, etc. Through multiple treatment processes, the pollutant emissions in the waste gas are greatly reduced, and the environmental pollution is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the process of the present invention;

[0025] Figure 2 It is a schematic diagram of the exhaust gas path structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the equipment connection structure of the present invention. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figures 1-3 , the present invention provides a technical solution: a method for recycling and utilizing the processing exhaust gas of waste tire pyrolysis;

[0029] This method for recycling and utilizing the processing exhaust gas of waste tire pyrolysis can improve its recovery rate. The specific implementation method is as follows:

[0030] S1: Guide the exhaust gas to the inside of the primary filter through a pipeline. Adsorb the impurities inside the gas through the primary filter, intercept the carbon black on the surface of the filter screen, and then collect the carbon black on the surface of the filter screen through a collection device;

[0031] S2: The primary filter transports the gas to the inside of the heat exchange system. Cool down the exhaust gas through the heat exchange system. At the same time, the heat recovered by the heat exchange device can heat the water. Detect the gas temperature through the induction device. When the induction device detects that the temperature is too high, guide the gas to the opening of the heat exchange system to re - conduct heat exchange. At the same time, pollutants such as benzene, toluene, and xylene generated by the heat exchange system can be purified through the separation system;

[0032] S3: The heat exchange system makes the exhaust gas enter the inside of the condensation system. Decompose the exhaust gas through the condensation system, collect the pollutants such as benzene, toluene, and xylene generated by the decomposition, and purify them through the separation system;

[0033] S4: The condensation system transports the finally unreacted exhaust gas to the inside of the microbial treatment system, makes the exhaust gas fully contact with the solution inside the microbial treatment system, and enables the pollutants inside the exhaust gas to be absorbed and decomposed by the microorganisms in the biological filter.

[0034] The waste gas is separated and passed through the pipeline into the primary filter multiple times, and the gas enters the interior of the filtering device, causing the waste gas to flow inside. When the waste gas moves to the surface of the filter screen, the filter screen filters the waste gas, adsorbing the carbon black inside the waste gas, and the carbon black adheres to the surface of the filter screen. The carbon black on the surface of the filter screen is collected regularly through the collection system, and the carbon black is centrally processed to complete the primary filtration of the waste gas, and then it flows out from the interior of the filtering device and enters the heat exchange system through the pipeline. At this time, the waste gas flows inside the heat exchange system, and the heat exchange system absorbs heat from the waste gas to cool it down. At the same time, the heat transferred out is transmitted to the tire processing on the other side to increase the heat of the tire processing with this heat. At the same time, the temperature sensing device filters the temperature of the discharged gas. When the temperature is higher than the set temperature, the temperature sensor transmits an electrical signal to the control device, causing the solenoid valve to control the opening of the connecting pipeline of the terminal heat exchange device, causing the waste gas to flow back, and the gas enters the heat exchange device again. When the temperature is lower than the set value, the solenoid valve on the pipeline connecting the terminal to the condensation tower is opened, causing the gas to move through the heat exchange device into the interior of the condensation tower, causing the waste gas to react inside the condensation tower. At the same time, inside the heat exchange system, pollutants such as benzene, toluene, and xylene may be generated, which are collected, and then purified through the separation system. The condensation tower decomposes the waste gas inside it, collects pollutants such as benzene, toluene, and xylene in the waste gas, and then purifies pollutants such as benzene, toluene, and xylene through the separation system to recover the pollutants. At the same time, in S2 and S3, the collected pollutants such as benzene, toluene, and xylene can be transmitted to the same separation system for unified purification. Finally, the waste gas that has not been decomposed by the condensation tower enters the microbial treatment system through the pipeline, causing the waste gas to enter the interior of the biological filter through the pipeline, causing the waste gas to come into contact with the microorganisms. At this time, the microorganisms can decompose the residual pollutants in the interior waste gas, and then the waste gas is discharged to reduce environmental pollution.

[0035] The waste gas enters the primary filter through the pipeline, causing the waste gas to first contact the filter screen, and the filter screen adsorbs the carbon black. After a certain period of time, the carbon black on the surface of the filter screen is collected through the collection device;

[0036] The waste gas first enters the interior of the primary filter, and the filtering device filters the waste gas, adsorbing the carbon black in the waste gas and collecting the carbon black in the waste gas. The carbon black can be used in multiple industries such as rubber products, inks, and coatings, and the carbon black is recycled.

[0037] The primary filter is connected to the heat exchange system through the pipeline, and the primary filter includes: a filtering device and a collection device;

[0038] Filtering device: It can filter the gas inside;

[0039] Collection device: Clean the surface of the filter screen;

[0040] The filtration device filters the gas entering the interior, causing carbon black to adsorb on the surface of the filter screen inside the filtration device. At the same time, the collection device regularly collects the carbon black on the filter screen surface and centrally processes the carbon black.

[0041] The heat exchange system includes: a heat exchanger and a temperature sensor inside. The two ends of the heat exchanger are respectively inside the primary filtration and the condensation tower, allowing the gas to enter the heat exchanger. The heat exchanger transfers heat, and at the same time, the heat exchanger transfers the heat to the interior of tire processing to heat the tire processing steps;

[0042] The exhaust gas after primary filtration enters the interior of the heat exchanger, enabling the heat exchanger to absorb the temperature inside the exhaust gas and cool the temperature of the exhaust gas. At the same time, the heat exchanger transfers the collected temperature to the interior of tire processing to recover the heat of the exhaust gas. Then, the gas after heat exchange in the heat exchanger passes by the surface of the temperature sensor, and the temperature sensor detects the heat of the exhaust gas. When the exhaust gas temperature is too high, the waste gas re-enters the heat exchanger for heat conduction. At the same time, when the exhaust gas temperature is lower than the set value, the exhaust gas can be discharged through the heat exchanger.

[0043] The temperature sensor is installed at the end of the heat exchanger and is set to a critical value. When the exhaust gas temperature passing through the heat exchange system is higher than the critical value, the exhaust gas is returned to the opening of the heat exchange system for re-heat exchange. When the exhaust gas temperature passing through the heat exchange system is lower than the critical value, the exhaust gas is transported through a pipeline to the interior of the condensation tower;

[0044] The temperature sensor filters the exhaust gas after heat exchange in the heat exchanger. When the temperature of the exhaust gas is higher than the set temperature value, the exhaust gas can be guided into the heat exchanger for secondary heat exchange. When the temperature is lower than the set temperature value, the gas enters the interior of the condensation system.

[0045] The condensation system includes a condensation tower, a separation system, and a collection device. At the same time, the two ends of the condensation tower are respectively connected to the heat exchange system and the biological filter pool, allowing the exhaust gas to enter the interior of the condensation tower. The condensation tower cools the exhaust gas, causing the organic pollutants to condense into a liquid. The condensation tower is connected to the separation system through the collection device, and the collection device collects pollutants such as benzene, toluene, and xylene in the condensation tower and transfers them to the interior of the separation system through the collection device;

[0046] The exhaust gas enters the interior of the condensation tower. When the gas flows inside the condensation tower, the condensation tower decomposes the exhaust gas and collects pollutants such as benzene, toluene, and xylene in the exhaust gas. Then, the collected benzene, toluene, xylene, and other pollutants are transferred to the interior of the separation system, and the separation system extracts and stores them.

[0047] The separation system in S3 includes devices such as distillation, extraction, and rectification. The pollutants such as benzene, toluene, and xylene are treated through the separation system.

[0048] The pollutants such as benzene, toluene, and xylene are transferred to the inside of devices such as distillation, extraction, and rectification, and the pollutants such as benzene, toluene, and xylene are purified through these devices.

[0049] The internal of the microbial treatment system includes a biological filter. The biological filter is connected to the condensation tower through a pipeline. The waste gas contacts the filter material layer placed inside the biological filter, so that the waste gas contacts the microorganisms attached to the surface of the filter material. The condensation tower transfers the unreacted gas to the microbial treatment system.

[0050] The end of the pipeline is installed at the bottom of the biological filter, so that the gas is directly discharged into the inside of the biological filter. At this time, the microorganisms inside the biological filter contact the waste gas, so that the microorganisms absorb and decompose the residual pollutants in the waste gas, treat the waste gas, and then discharge the waste gas that has undergone multiple treatments.

[0051] Working principle: When using the method for recycling the processing waste gas of waste tire pyrolysis, a primary filtration, heat exchange system, condensation system, and microbial treatment system are set up, which increases the overall practicability.

[0052] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for recycling and utilization of processing waste gas from pyrolysis of waste tires, characterized in that: It includes the following steps: S1: Guide the waste gas to the inside of the primary filter through a pipeline. Adsorb the impurities inside the gas through the primary filter, intercept the carbon black on the surface of the filter screen, and then collect the carbon black on the surface of the filter screen through a collection device; S2: The primary filter transports the gas to the inside of the heat exchange system. Cool the waste gas through the heat exchange system. At the same time, the heat recovered by the heat exchange device can heat the water. Detect the gas temperature through the induction device. When the induction device detects that the temperature is too high, guide the gas to the opening of the heat exchange system to perform heat exchange again. At the same time, pollutants such as benzene, toluene, and xylene generated by the heat exchange system can be purified through the separation system; S3: The heat exchange system enables the waste gas to enter the inside of the condensation system. Let the waste gas enter the inside of the condensation system. Decompose the waste gas through the condensation system, collect the pollutants such as benzene, toluene, and xylene generated by the decomposition, and purify them through the separation system; S4: The condensation system transports the finally unreacted waste gas to the inside of the microbial treatment system, enables the waste gas to come into full contact with the solution inside the microbial treatment system, and enables the pollutants inside the waste gas to be absorbed and decomposed by the microorganisms inside the biological filter.

2. The method for recycling and utilization of processing waste gas from thermal cracking of waste tires according to claim 1, characterized in that: The waste gas enters the inside of the primary filter through a pipeline, enables the waste gas to first contact the filter screen, enables the filter screen to adsorb the carbon black, and after a certain period of time, collect the carbon black on the surface of the filter screen through a collection device.

3. A method for recycling and utilizing the processing waste gas of waste tire pyrolysis according to claim 1, characterized in that: The primary filter is connected to the heat exchange system through a pipeline, and the primary filter includes: a filtering device and a collection device; Filtering device: Can filter the gas inside; Collection device: Clean the surface of the filter screen.

4. A method for recycling and utilization of processing waste gas from thermal cracking of waste tires according to claim 1, characterized in that: The inside of the heat exchange system includes: a heat exchanger and a temperature sensor. The two ends of the heat exchanger are respectively inside the primary filter and the condensation tower. Let the gas enter the inside of the heat exchanger, transfer the heat through the heat exchanger. At the same time, the heat exchanger transfers the heat to the inside of the tire processing, and heats the steps of tire processing.

5. A method for recycling and utilization of processing waste gas from thermal cracking of waste tires according to claim 1, characterized in that: The temperature sensor is installed at the end of the heat exchanger. The temperature sensor is set to a critical value. When the temperature of the waste gas passing through the heat exchange system is higher than the critical value, make the waste gas return to the opening of the heat exchange system to perform heat exchange again. When the temperature of the waste gas passing through the heat exchange system is lower than the critical value, transport the waste gas to the inside of the condensation tower through a pipeline.

6. A method for recycling and utilization of processing waste gas from thermal cracking of waste tires according to claim 4, characterized in that: The condensation system includes a condensation tower, a separation system and a collection device. At the same time, the two ends of the condensation tower are respectively connected to the heat exchange system and the biological filter. Let the waste gas enter the inside of the condensation tower. Cool the waste gas through the condensation tower. Cool the waste gas through the condensation tower, condense the organic pollutants into a liquid. And the condensation tower is connected to the separation system through the collection device. Collect the pollutants such as benzene, toluene, and xylene in the condensation tower through the collection device, and transfer them to the inside of the separation system through the collection device.

7. A method for recycling and utilization of processing waste gas from thermal cracking of waste tires according to claim 1, characterized in that: The separation system in S3 includes: devices such as distillation, extraction, and rectification. Treat pollutants such as benzene, toluene, and xylene through the separation system.

8. A method for recycling and utilization of processing waste gas from pyrolysis of waste tires according to claim 1, characterized in that: The internal of the microbial treatment system includes a biological filter, which is connected to a condensation tower through a pipeline. The waste gas contacts the filter media layer placed inside the biological filter, so that the waste gas contacts the microorganisms attached to the surface of the filter media. The condensation tower transfers the unreacted gas to the microbial treatment system.

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