A system and method for the high-value resource utilization of co-pyrolysis of carbon slag and waste tire rubber particles

Abstract

The present invention discloses a system for the high-value resource utilization of co-pyrolysis of carbon slag and waste tire rubber particles, comprising: a carbon slag / rubber particle receiving and mixing module, a material lifting and conveying module, a material buffer silo, a co-pyrolysis and upgrading module for carbon slag / rubber particles, a pyrolysis oil condensation and separation module, a non-condensable gas pressure stabilizing and gas storage cabinet, a carbon black cooling and buffer silo, a carbon black high-value treatment module, high-quality carbon black particles, a flue gas purification module, and a measurement, prediction and control module. Through the collection and analysis of signals, the mixing ratio of carbon slag and rubber particles is automatically controlled, as well as the automatic transportation of the mixed material; the present invention also discloses a method for the high-value resource utilization of co-pyrolysis of carbon slag and waste tire rubber particles. By using the present invention, automatic calculation can be carried out through the feedback of various signals, and some modules of the system can be automatically adjusted, which can reduce the labor input and labor intensity, lower the labor cost, and realize continuous production and all-weather operation.

Description

Technical Field

[0001] The present invention belongs to the field of harmless and resource utilization of solid waste, and in particular relates to a system and method for co-pyrolysis and high-value resource utilization of carbon slag and waste tire rubber particles. Background Art

[0002] Commonly used ways for resource utilization of waste tires include: direct retreading, production of reclaimed rubber powder, direct incineration, pyrolysis, etc. Among them, pyrolysis is the most effective and thorough treatment method for waste tires. Pyrolysis of waste tires solves the dangers and hazards caused by the accumulation of waste tires. Through pyrolysis, waste tires can recover combustible gas, oil products and pyrolytic carbon black, and pyrolytic carbon black is the key product of tire pyrolysis.

[0003] With the continuous update of the waste tire pyrolysis oil refining process, current waste tire pyrolysis equipment on the market is mainly divided into batch pyrolysis equipment and continuous pyrolysis equipment. Compared with continuous pyrolysis equipment, batch pyrolysis equipment has problems such as ineffective time periods of frequent heating, cooling, slag discharging and reloading, and fuel waste. However, due to its lower investment cost, batch pyrolysis equipment also has a wider coverage in the market.

[0004] However, due to the frequent start and stop of batch pyrolysis equipment, and there is no obvious separation channel between pyrolysis oil and carbon black, it is difficult to precisely control the pyrolysis temperature, resulting in high oil content and unstable performance of the pyrolytic carbon black produced, which is generally treated as carbon slag. Since carbon black with a high oil content cannot be widely used as a high-value-added product in fields such as rubber, plastics, coatings, and inks. Since the calorific value of carbon slag is equivalent to that of coal, most carbon slag is made into spherical carbon black or made into carbon black coal balls together with coal for heating and combustion, so the price is relatively low. How to recycle carbon slag with a high oil content, improve its quality and performance stability, and achieve high-value utilization is an urgent problem to be solved. Summary of the Invention

[0005] The present invention provides a system and method for co-pyrolysis and high-value resource utilization of carbon slag and waste tire rubber particles, realizing the co-enhanced pyrolysis of carbon slag and rubber particles, improving the added value of products, and increasing the adaptive adjustment ability of the system through the setting of a measurement and prediction control module.

[0006] A system for co-pyrolysis and high-value resource utilization of carbon slag and waste tire rubber particles, comprising:

[0007] A carbon slag / rubber particle receiving and mixing module, used for mixing carbon slag and rubber particles. According to different requirements, the mixing ratio between carbon slag and rubber particles can be adjusted, and the unique design between the mixing modules ensures uniform mixing between carbon slag and rubber particles. The obtained mixed material is sent to a material buffer bin through a material lifting and conveying module;

[0008] Material lifting and conveying module, used to convey mixed materials;

[0009] The material buffer silo is used to store the mixed material conveyed by the material lifting and conveying module, and a mixed material weight sensor is installed in the material buffer silo;

[0010] The carbon slag / colloid particle co-pyrolysis quality improvement module uses heat source to co-pyrolyze carbon slag and colloid particles, with a pyrolysis efficiency of 99%. The generated pyrolysis oil and gas are sent to the pyrolysis oil condensation separation module; the generated crude carbon black is sent to the carbon black cooling buffer bin;

[0011] The pyrolysis oil condensation and separation module is used to condense the pyrolysis oil and gas produced by the carbon slag / colloid particle co-pyrolysis and quality improvement module, and separate it into pyrolysis oil and non-condensable gas. The non-condensable gas is sent to the non-condensable gas pressure-stabilizing gas storage cabinet, and the pyrolysis oil condensation and separation module is equipped with a pyrolysis oil liquid level sensor;

[0012] A non-condensable gas pressure-stabilizing gas storage tank is used to store the non-condensable gas separated by the pyrolysis oil condensation separation module, and the non-condensable gas pressure-stabilizing gas storage tank is equipped with a pyrolysis gas volume sensor;

[0013] Carbon black cooling and buffering bin, used to store the crude carbon black produced by the carbon slag / colloid particle co-pyrolysis and upgrading module;

[0014] The carbon black high-value processing module is used to process the crude carbon black produced by the carbon slag / colloid particle co-pyrolysis and quality improvement module to produce higher quality carbon black particles;

[0015] High-quality carbon black is the carbon black particles produced after being processed by the carbon black high-value processing module;

[0016] The flue gas purification module uses low-temperature SCR and wet desulfurization technology to remove nitrogen and sulfur pollutants from the flue gas generated after the pyrolysis oil and pyrolysis gas are burned by the burner, and the clean flue gas is discharged into the atmosphere;

[0017] The measurement and prediction control module obtains the pyrolysis oil of the pyrolysis oil condensation and separation module through the pyrolysis oil level sensor and the non-condensable gas reserves in the non-condensable gas pressure-stabilizing gas storage cabinet through the pyrolysis gas volume sensor, and obtains the material quantity in the material buffer silo through the mixed material weight sensor, automatically calculates the mixing ratio of carbon slag and colloid particles, controls the carbon slag / colloid particle receiving mixing module to adjust the mixing ratio of carbon slag and colloid particles, and automatically replenishes the mixed material into the material buffer silo through the material lifting module.

[0018] In order to ensure the mixing effect of carbon slag and rubber particles, and to prevent obvious stratification of carbon slag and rubber particles due to density difference after mixing, preferably, the coaxial bidirectional screw device is controlled by the same motor, and the screw blades on both sides of the material partition have different directions, so as to control the transportation of carbon slag and rubber particles to both sides and mix them after passing through the guide bin.

[0019] In order to further improve the mixing effect of carbon slag and rubber particles, preferably, a collision column is provided under the guiding bin, and the extension line of the inclined plate of the guiding bin coincides with the top end of the collision column. The two materials of carbon slag and rubber particles falling from both sides of the coaxial double - helix device are impacted with the collision column under the guiding action of the guiding bin. Finally, after the carbon slag / rubber particles are dispersed by colliding with the collision column, they are mixed, which can ensure better mixing uniformity between the carbon slag and the rubber particles.

[0020] In order to further improve the pyrolysis efficiency of carbon slag and rubber particles, preferably, a number of material deflectors are provided between the spiral blades of the homogeneous pyrolysis helix to make the rubber particles mix evenly, increase the heat exchange temperature difference, and strengthen heat transfer.

[0021] Generally speaking, the thermal conductivity coefficients of carbon slag and rubber particles are different. By mixing carbon slag and rubber particles, the pyrolysis efficiency of the mixed material of carbon slag and rubber particles can be improved. And through the arrangement of the material deflectors in the homogeneous pyrolysis helix, the mixing between carbon slag and rubber particles can be made more uniform. Moreover, by using the arrangement of the material deflectors, the filling rate of the mixed material in the homogeneous pyrolysis helix can be higher, improving the utilization rate of the homogeneous pyrolysis helix.

[0022] In order to further improve the pyrolysis efficiency of carbon slag and rubber particles, preferably, the set temperature of the high - temperature upgrading helix is higher than the set temperature of the homogeneous pyrolysis helix, which is used to continue pyrolyzing the mixed material discharged from the homogeneous pyrolysis helix and improve the quality of pyrolytic carbon black. So that the pyrolytic material produced from the homogeneous pyrolysis helix can produce pyrolytic carbon black with a toluene extract light transmittance higher than 90% under the action of the high - temperature upgrading helix.

[0023] In order to achieve the regulation and control of pyrolysis non - condensable gas, preferably, the non - condensable gas pressure - stabilizing gas storage tank adopts a floating - plate design. The floating plate on the non - condensable gas pressure - stabilizing gas tank will move up and down with the change of the non - condensable gas volume inside it. Through the design of the floating plate, the change of the non - condensable gas storage can be measured more accurately.

[0024] In order to realize the high - value resource utilization of pyrolytic carbon black, preferably, a carbon black high - value treatment module is added to the system. By grinding, granulating and drying the pyrolytic carbon black, the quality of the pyrolytic carbon black is improved, and high - quality carbon black particles are produced.

[0025] In order to achieve the up - to - standard discharge of pyrolysis high - temperature flue gas, preferably, the flue gas purification system removes pollutants such as NOx, SO2 and particulate matter in the tail gas through low - temperature SCR and wet desulfurization technologies.

[0026] To achieve the regulation of the mixing ratio of carbon slag and rubber particles, preferably, on one side of the material buffer silo for storing carbon slag, an electric control valve is provided. Through the measurement and prediction control module, based on the measured changes of the pyrolysis gas flow sensor and the pyrolysis oil level sensor, the electric control valve is automatically adjusted, and the coaxial bidirectional spiral device is started, achieving the effect of automatically adjusting the mixing ratio of carbon slag and rubber particles.

[0027] Since carbon slag is the product after pyrolysis in an intermittent pyrolysis device, although the oil content in carbon slag is still relatively high, resulting in poor quality, the pyrolysis oil and gas produced after its re-pyrolysis only account for 3% - 5% of the total mass, while the pyrolysis oil and gas produced from the pyrolysis of waste tires account for about 60% of the mass. Therefore, when the pyrolysis device only pyrolyzes carbon slag, the pyrolysis oil and gas produced are not enough to provide heat for the device, and when completely pyrolyzing waste tires, the pyrolysis oil and gas produced cannot be completely consumed. Therefore, the adjustable ratio co-pyrolysis design of carbon slag / rubber particles can realize the continuous resource utilization of carbon slag, solving problems such as the ineffective time periods of frequent heating, cooling, slag discharging, and reloading, as well as fuel waste in intermittent pyrolysis devices.

[0028] Further preferably, to improve the automation level of the continuous pyrolysis mixing ratio adjustment of carbon slag and rubber particles, the measurement and prediction control module includes a mixed material weight sensor, a pyrolysis oil level sensor, a pyrolysis gas flow sensor, an electric slide valve adjustment signal, and a coaxial reverse spiral start signal. Among them, the measurement and prediction control module can obtain the current amounts of pyrolysis oil and pyrolysis gas by acquiring the signals of the pyrolysis oil level sensor and the pyrolysis gas flow sensor, calculate the time that can continue to provide combustion, and control the electric slide valve adjustment signal to adjust the opening degree of the electric slide valve, ultimately achieving the purpose of controlling the mixing ratio of carbon slag and rubber particles. Through the above adjustment, after multiple iterations, a state of balance between the total energy required for pyrolysis and the pyrolysis gas and pyrolysis oil produced by pyrolysis can be finally achieved. And through the pyrolysis oil condensation and separation module and the pyrolysis oil and pyrolysis gas stored in the non-condensable gas pressure stabilizing gas storage tank, an elastic interval for logic adjustment is ensured, as well as the energy reserve when the device restarts.

[0029] The control logic is as follows:

[0030] W 胶粒 = kW 碳渣

[0031] W 处理量 = W 碳渣 + kW 碳渣

[0032] In the formula: W 处理量 —Total pyrolysis amount of the pyrolysis system, kg / h

[0033] W 胶粒 —Rubber particle processing amount, kg / h

[0034] W 碳渣 — Carbon slag treatment volume, kg / h

[0035] K — Ratio of rubber particles to carbon slag

[0036] Q 总能耗 = W 碳渣 P 碳渣 + kW 碳渣 P 胶粒 + Q 高值化

[0037] Where: Q 总能耗 — Total energy required for pyrolysis of W 胶粒 and W 碳渣 kJ / h

[0038] Q 高值化 — Energy required for the high-value conversion module of carbon black, kJ / h

[0039] P 碳渣 — Energy required for pyrolysis of unit weight of carbon slag, kJ / Kg

[0040] P 胶粒 — Energy required for pyrolysis of unit weight of rubber particles, kJ / Kg

[0041] W 碳渣 — Carbon slag treatment volume, kg / h

[0042] K — Ratio of rubber particles to carbon slag

[0043] Q 产出 = W 碳渣 α1q 油 + kW 碳渣 α2q 油 + W 碳渣 β1q 气 + kW 碳渣 β2q 气

[0044] Where: α1 — Yield of pyrolysis oil corresponding to carbon slag, %

[0045] α2 — Yield of pyrolysis oil corresponding to rubber particles, %

[0046] β1 — Yield of pyrolysis gas corresponding to carbon slag, %

[0047] β2 — Yield of pyrolysis gas corresponding to rubber particles, %

[0048] q 油 — Calorific value of pyrolysis oil, kJ / Kg

[0049] q 气 — Calorific value of pyrolysis gas, kJ / Kg

[0050] W 碳渣 — Carbon slag treatment capacity, kg / h

[0051] K — Ratio of rubber particles to carbon slag

[0052] Q 总能耗 ≈Q 产出 +Q 缓存

[0053] In the formula: Q 缓存 — Pyrolysis oil and pyrolysis gas stored in the pyrolysis oil condensation separation module and the non-condensable gas pressure stabilizing and gas storage tank for adjustment

[0054] Q 产出 — Total energy of pyrolysis gas and pyrolysis oil produced after the mixed material of carbon slag and waste tire rubber particles passes through the carbon slag / rubber particle co-pyrolysis and quality improvement module

[0055] This application also proposes a method for high-value resource utilization of co-pyrolysis of carbon slag and waste tire rubber particles, which is realized based on a system for high-value resource utilization of co-pyrolysis of carbon slag and waste tire rubber particles, and includes the following steps:

[0056] Step 1: Use the carbon slag / rubber particle receiving and mixing module to mix carbon slag and rubber particles into a uniformly mixed material;

[0057] Step 2: The mixed material is sent to the material buffer bin for temporary storage under the action of the material lifting and conveying module;

[0058] Step 3: Rubber particles enter the carbon slag / rubber particle co-pyrolysis and quality improvement module from the material buffer bin, and high-temperature pyrolysis oil and gas and pyrolysis crude carbon black are generated through the homogeneous pyrolysis screw and high-temperature quality improvement screw. The high-temperature pyrolysis oil and gas lead to the pyrolysis oil condensation separation module, and the pyrolysis crude carbon black leads to the carbon black cooling and buffer bin;

[0059] Step 4: After passing through the pyrolysis oil condensation separation module, the high-temperature pyrolysis oil and gas are divided into pyrolysis oil and non-condensable gas. The non-condensable gas enters the non-condensable gas pressure stabilizing and gas storage tank. The pyrolysis oil burns in the hot blast stove in the carbon slag / rubber particle co-pyrolysis and quality improvement module to provide heat for the co-pyrolysis of carbon slag and rubber particles. The non-condensable gas goes to the carbon black high-value treatment module to provide heat for the high-value treatment of crude carbon black. When the non-condensable gas gas volume sensor feeds back insufficient non-condensable gas volume, the rich waste pyrolysis oil can also be used in the carbon black high-value treatment module;

[0060] Step 5: The pyrolysis crude carbon black enters the carbon black cooling and buffer bin for cooling and storage;

[0061] Step 6: The crude carbon black enters the carbon black high-value treatment module for high-value treatment to produce high-quality carbon black particles;

[0062] Step 7: After the waste heat flue gas discharged from the carbon slag / rubber particle co-pyrolysis upgrading module and the carbon black high-value treatment module removes pollutants such as NOx, SO2, and particulate matter through the flue gas purification module, the clean flue gas is discharged through the chimney.

[0063] Compared with the prior art, the present invention has the following beneficial effects:

[0064] The co-pyrolysis high-value resource utilization system and method of carbon slag and waste tire rubber particles of the present invention realizes the high-value resource utilization of low-quality carbon slag and produces high-quality carbon black particles compared with the prior art. And the present invention has the advantages of high pyrolysis efficiency, compact equipment, low investment cost, and long operation cycle. By setting up a measurement and prediction control module, the concept of automatically adjusting the mixing ratio of carbon slag / rubber particles is proposed, and the self-adaptive adjustment and automatic operation are realized in combination with the reserves of pyrolysis oil and pyrolysis gas and the weight of the mixed materials. Description of the Drawings

[0065] Figure 1 It is the system flow chart of the co-pyrolysis high-value resource utilization system and method of carbon slag and waste tire rubber particles of the present invention;

[0066] Figure 2 It is the schematic diagram of the carbon slag / rubber particle receiving and mixing module in the co-pyrolysis high-value resource utilization system and method of carbon slag and waste tire rubber particles of the present invention;

[0067] Figure 3 It is the flow chart of the carbon slag / rubber particle co-pyrolysis upgrading module of the co-pyrolysis high-value resource utilization system and method of carbon slag and waste tire rubber particles of the present invention;

[0068] Figure 4 It is the flow chart of the measurement and prediction control module in the co-pyrolysis high-value resource utilization system and method of carbon slag and waste tire rubber particles of the present invention; Detailed Embodiments

[0069] To make the purpose, technical solutions, and advantages of the present invention clearer, the present invention will be further described below in conjunction with the embodiments and their accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the described embodiments belong to the scope of protection of the present invention.

[0070] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings as understood by those of ordinary skill in the field to which the present invention pertains. The terms such as "including" or "comprising" used in the present invention mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" do not limit to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", and "right" are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0071] Example

[0072] See Figure 1 , a co-pyrolysis high-value resource utilization system for carbon slag and waste tire rubber particles in this example, includes a carbon slag / rubber particle receiving and mixing module 1, a material lifting and conveying module 2, a material buffer silo 3, a carbon slag / rubber particle co-pyrolysis upgrading module 4, a pyrolysis oil condensation and separation module 5, a non-condensable gas pressure stabilizing and gas storage tank 6, a carbon black cooling and buffer silo 7, a carbon black high-value treatment module 8, high-quality carbon black 9, a flue gas purification module 10, and a measurement, prediction and control module 11.

[0073] The carbon slag / rubber particle receiving and mixing module 1 in this example is used to mix carbon slag and rubber particles. See Figure 2, the carbon slag / colloid receiving and mixing module 1 includes a material bin 101, a material partition 102, an electric slide valve 103, a coaxial bidirectional spiral device 104, a colloid outlet 105, a carbon black outlet 106, a guiding bin 107, a collision column 108, and a carbon slag / colloid mixed material buffer bin 109. The material bin 101 is divided into two chambers by the material partition 102. The left chamber is for the entry of colloid materials, and the right chamber is for the entry of carbon slag materials. An electric slide valve 103 is provided at the lower part of the right chamber. By adjusting the electric slide valve 103, the passing amount of the carbon slag materials is controlled, and finally different mixing ratios of carbon slag / colloid are achieved. Among them, the coaxial bidirectional spiral device 104 includes a spiral cylinder body, and a spiral shaft and spiral blades arranged inside the spiral cylinder body. Specifically, the middle of the coaxial bidirectional spiral device 104 is divided into two sections by the material partition 102. Positive and negative spiral blades are provided at both ends of the spiral shaft located at the material partition 102. By driving the spiral shaft to rotate with a motor, the colloid and carbon slag can fall from both ends of the spiral cylinder body, that is: the colloid falls from the colloid outlet 105, and the carbon slag falls from the carbon black outlet 106. The falling carbon slag and colloid are guided by the inclined plates on both sides of the guiding bin 107. The carbon slag and colloid fall along the guiding bin 107 and mix after hitting the top of the collision column 108, and then fall into the carbon slag / colloid mixed material buffer bin 109 for temporary storage here. Further, a number of bin wall vibrators can be provided on the lower side wall of the guiding bin 107 to prevent material accumulation and improve the fluidity of the materials.

[0074] The material lifting and conveying module 2 in this embodiment is used to convey the mixed materials;

[0075] The material buffer bin 3 in this embodiment is used to store the mixed materials conveyed by the material lifting module 2, and is equipped with a mixed material weight sensor 1101. The mixed material weight sensor 1101 is used to measure the weight of the mixed materials in the material buffer bin 3 and feed this data back to the calculation and prediction control module 11;

[0076] The carbon slag / colloid co-pyrolysis and upgrading module 4 in this embodiment uses a heat source to co-pyrolyze the carbon slag and colloid, see Figure 3, the carbon slag / colloid co-pyrolysis upgrading module 4 includes a homogenizing pyrolysis screw 401, a high-temperature upgrading screw 402, a hot blast stove 403, and a burner 404. The material buffer bin 3, the homogenizing pyrolysis screw 401, the high-temperature upgrading screw 402, and the carbon black cooling buffer bin 7 are arranged and connected in an up-and-down structure. The mixed material in the material buffer bin 3 falls into the homogenizing pyrolysis screw 401 under the action of gravity and moves to the other side of the homogenizing pyrolysis screw under the push of the screw. After the pyrolysis of the mixed material in the homogenizing pyrolysis screw 401 is completed, it falls into the high-temperature upgrading screw 402 under the action of gravity and moves to the other side of the high-temperature upgrading screw under the push of the screw. Deep pyrolysis is carried out through the high-temperature upgrading screw, and finally it falls into the cooling buffer bin 7 under the action of gravity. Both the homogenizing pyrolysis screw 401 and the high-temperature upgrading screw 402 are heated by the high-temperature flue gas from the hot blast stove 403, and the set temperature of the high-temperature upgrading screw 402 is higher than the set temperature of the homogenizing pyrolysis screw 401. By controlling the different high-temperature flue gas flow rates of the two screws, the temperatures of the two screws are adjusted differently. The greater the high-temperature flue gas flow rate, the higher the temperature; conversely, the smaller the high-temperature flue gas flow rate, the lower the temperature. Through the design of the high and low temperatures of the two screws, the homogenizing pyrolysis screw 401 with a slightly lower temperature is preferentially used to complete most of the pyrolysis of the mixed material, and finally the high-temperature upgrading screw 402 with a higher temperature is used to completely pyrolyze the mixed material that has not been completely pyrolyzed, and the light transmittance of the produced crude carbon black toluene extract is higher than 90%. The high-temperature flue gas of the hot blast stove 403 is generated after the pyrolysis oil condensed and separated by the pyrolysis oil condensation separation module 5 is burned by the burner 404.

[0077] The homogenizing pyrolysis screw 401 includes a second screw cylinder body. A second screw shaft and second screw blades are arranged in the second screw cylinder body. The second screw blades are driven to rotate by a motor through the second screw shaft. Specifically, a material pusher 4011 is arranged between two second screw blades on the second screw shaft of the homogenizing pyrolysis screw 401, and a total of 6-8 material pushers 4011 are arranged on the second screw shaft of the homogenizing pyrolysis screw 401. The material pusher 4011 is used to push the mixed material in the homogenizing pyrolysis screw 401, so that the materials with different temperatures are mixed evenly under the action of the material pusher 4011. Prevent the local temperature of the mixed material in the homogenizing pyrolysis screw 401 from being too high and the local temperature from being insufficient, which affects the pyrolysis effect. Finally, the effect of strengthening heat transfer is achieved.

[0078] The high-temperature upgrading screw 402 includes a third screw cylinder body. A third screw shaft and third screw blades are arranged in the third screw cylinder body. The third screw blades are driven to rotate by a motor through the third screw shaft.

[0079] In the pyrolysis oil condensation and separation module 5 of this embodiment, the pyrolysis oil condensation and separation module 5 is used to condense the pyrolysis oil and gas generated after pyrolysis by the carbon residue / rubber particle co-pyrolysis and upgrading module 4. The condensed pyrolysis oil is sent to the carbon residue / rubber particle co-pyrolysis and upgrading module 4 as fuel for combustion. A liquid level sensor 1102 is provided on the pyrolysis oil condensation and separation module 5 to monitor the pyrolysis oil storage and feed back signals to the calculation, prediction and control module 11.

[0080] In this embodiment, the non-condensable gas pressure stabilizing gas storage tank 6 is used to store the non-condensable gas separated by the pyrolysis oil condensation and separation module 5. The non-condensable gas pressure stabilizing gas storage tank 6 adopts a floating plate design. The floating plate on the non-condensable gas pressure stabilizing gas storage tank 6 will move up and down with the change of the non-condensable gas volume inside, and feed back signals to the calculation, prediction and control module 11 through the pyrolysis gas volume sensor 1103. The non-condensable gas stored in the non-condensable gas pressure stabilizing gas storage tank 6 is used as fuel for the carbon black high-value treatment module 8.

[0081] In this embodiment, the carbon black cooling and buffer bin 7 is used to store the crude carbon black produced by the carbon residue / rubber particle co-pyrolysis and upgrading module 4 and plays a role in slowly cooling the crude carbon black.

[0082] In this embodiment, the carbon black high-value treatment module 8 is used to process the crude carbon black produced by the carbon residue / rubber particle co-pyrolysis and upgrading module 4 to produce carbon black particles of higher quality. An oil-gas dual-purpose burner is provided in the carbon black high-value treatment module 8. The oil-gas dual-purpose burner mainly uses the pyrolysis gas provided by the non-condensable gas pressure stabilizing gas storage tank 6 as fuel. When the pyrolysis gas storage is insufficient, the pyrolysis oil provided by the pyrolysis oil condensation and separation module 5 can also be used as fuel.

[0083] In this embodiment, the high-quality carbon black 9 is the carbon black particles produced after being processed by the carbon black high-value treatment module 8;

[0084] In this embodiment, the flue gas purification module 10 is used to remove nitrogen and sulfur-containing pollutants in the flue gas generated after the combustion of pyrolysis oil and pyrolysis gas by the burner, and the generated clean flue gas is discharged into the atmosphere. The flue gas purification module 10 removes NOx, SO2 and particulate matter pollutants in the tail gas through low-temperature SCR and wet desulfurization technologies.

[0085] In this embodiment, for the calculation, prediction and control module 11, see Figure 4, by obtaining the reserves of pyrolysis oil in the pyrolysis oil condensation and separation module 5, the non-condensable gas in the non-condensable gas pressure stabilizing and gas storage tank 6, and the amount of materials in the material buffer silo 3, automatically calculate and obtain the change trends of pyrolysis oil and non-condensable gas, predict the ratio relationship between the output and energy consumption under the current mixing ratio of carbon slag and rubber particles, measure and predict that the control module 11 operates normally to automatically calculate the mixing ratio of carbon slag and rubber particles, and control the carbon slag / rubber particle receiving and mixing module 1 to adjust the mixing ratio of carbon slag and rubber particles. Through the above adjustment, after multiple iterations, a state of balance between the total energy required for pyrolysis and the pyrolysis gas and pyrolysis oil produced by pyrolysis can be finally achieved. And through the pyrolysis oil stored inside the pyrolysis oil condensation and separation module 5 and the non-condensable gas pressure stabilizing and gas storage tank 6, as well as the pyrolysis gas, an elastic range during logical adjustment is ensured, and the energy reserve for equipment restart is satisfied.

[0086] The control logic is as follows:

[0087] W 胶粒 =kW 碳渣

[0088] W 处理量 =W 碳渣 +kW 碳渣

[0089] In the formula: W 处理量 —Total pyrolysis amount of the pyrolysis system, kg / h

[0090] W 胶粒 —Rubber particle processing amount, kg / h

[0091] W 碳渣 —Carbon slag processing amount, kg / h

[0092] K—Ratio of rubber particles / carbon slag

[0093] Q 总能耗 =W 碳渣 P 碳渣 +kW 碳渣 P 胶粒 +Q 高值化

[0094] In the formula: Q 总能耗 —Total energy required for pyrolysis of W 胶粒 and W 碳渣 , kJ / h

[0095] Q 高值化 —Energy required for the carbon black high-value utilization module, kJ / h

[0096] P 碳渣 —Energy required for pyrolyzing unit weight of carbon slag, kJ / Kg

[0097] P 胶粒— Energy required to pyrolyze per unit weight of rubber particles, kJ / Kg

[0098] W 碳渣 — Carbon slag treatment capacity, kg / h

[0099] K — Ratio of rubber particles to carbon slag

[0100] Q 产出 =W 碳渣 α1q 油 +kW 碳渣 α2q 油 +W 碳渣 β1q 气 +kW 碳渣 β2q 气

[0101] Where: α1 — Yield of pyrolysis oil corresponding to carbon slag, %

[0102] α2 — Yield of pyrolysis oil corresponding to rubber particles, %

[0103] β1 — Yield of pyrolysis gas corresponding to carbon slag, %

[0104] β2 — Yield of pyrolysis gas corresponding to rubber particles, %

[0105] q 油 — Calorific value of pyrolysis oil, kJ / Kg

[0106] q 气 — Calorific value of pyrolysis gas, kJ / Kg

[0107] W 碳渣 — Carbon slag treatment capacity, kg / h

[0108] K — Ratio of rubber particles to carbon slag

[0109] Q 总能耗 ≈Q 产出 +Q 缓存

[0110] Where: Q 缓存 — Pyrolysis oil and pyrolysis gas stored in the pyrolysis oil condensation separation module and the non-condensable gas pressure stabilizing gas storage tank for regulation

[0111] Q 产出 — Total energy of pyrolysis gas and pyrolysis oil produced after the mixed material of carbon slag and waste tire rubber particles passes through the carbon slag / rubber particle co-pyrolysis upgrading module

[0112] A method for co-pyrolysis and high-value resource utilization of carbon slag and waste tire rubber particles in this embodiment includes the following steps:

[0113] Step 1, use the carbon slag / rubber particle receiving and mixing module 1 to mix carbon slag and rubber particles into a uniformly mixed material;

[0114] Step 2: The mixed materials are sent to the material buffer bin 3 for temporary storage under the action of the material lifting and conveying module 2;

[0115] Step 3: The rubber particles enter the carbon residue / rubber particle co-pyrolysis and upgrading module 4 from the material buffer bin 3, and pass through the homogeneous pyrolysis screw 401 and the high-temperature upgrading screw 402 to generate high-temperature pyrolysis oil gas and pyrolysis crude carbon black. The high-temperature pyrolysis oil gas goes to the pyrolysis oil condensation and separation module 5, and the pyrolysis crude carbon black goes to the carbon black cooling and buffer bin 7;

[0116] Step 4: After passing through the pyrolysis oil condensation and separation module 5, the high-temperature pyrolysis oil gas is divided into pyrolysis oil and non-condensable gas. The non-condensable gas enters the non-condensable gas pressure stabilizing and gas storage tank 6. The pyrolysis oil burns in the hot blast stove in the carbon residue / rubber particle co-pyrolysis and upgrading module 4 to provide heat for the carbon residue / rubber particle co-pyrolysis. When the non-condensable gas gas volume sensor 1103 feeds back that the non-condensable gas volume is insufficient, the rich waste pyrolysis oil can also be used in the carbon black high-value treatment module 8;

[0117] Step 5: The pyrolysis crude carbon black enters the carbon black cooling and buffer bin 7 for cooling and storage;

[0118] Step 6: The crude carbon black enters the carbon black high-value treatment module 8 for high-value treatment to produce high-quality carbon black particles;

[0119] Step 7: The waste heat flue gas discharged from the carbon residue / rubber particle co-pyrolysis and upgrading module 4 and the carbon black high-value treatment module 8 removes pollutants such as NOx, SO2 and particulate matter in the flue gas through the flue gas purification module 10, and the clean flue gas is discharged through the chimney.

[0120] The features and benefits of the present invention are illustrated by reference to the embodiments. Accordingly, the present invention should not be explicitly limited to these exemplary embodiments that illustrate some possible non-limiting combinations of features, which may exist alone or in other combinations of features.

[0121] The above-described embodiments are only specific embodiments of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit it. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A co-pyrolysis high-value resource utilization system for carbon slag and waste tire rubber particles, comprising: The carbon slag / rubber pellet receiving and mixing module is used to mix carbon slag and rubber pellets, and the obtained mixed material is sent to the material buffer bin through the material lifting and conveying module; The material lifting and conveying module is used to convey the mixed material; the material buffer silo is used to store the mixed material conveyed by the material lifting and conveying module, and the material buffer silo is equipped with a mixed material weight sensor; the carbon slag / colloid particle co-pyrolysis and upgrading module uses a heat source to co-pyrolyze the carbon slag and the colloid particle, and the generated pyrolysis oil and gas are led to the pyrolysis oil condensation and separation module, and the generated crude carbon black is led to the carbon black cooling buffer bin; the pyrolysis oil condensation and separation module is used to condense the pyrolysis oil and gas generated by the carbon slag / colloid particle co-pyrolysis and upgrading module, and separate it into pyrolysis oil and non-condensable gas, and the non-condensable gas is sent to the non-condensable gas pressure-stabilizing gas storage cabinet, and the pyrolysis oil condensation and separation module is equipped with a pyrolysis oil level sensor; the non-condensable gas pressure-stabilizing gas storage cabinet is used to store the non-condensable gas separated by the pyrolysis oil condensation and separation module, and the non-condensable gas The pressure-stabilizing gas storage cabinet is equipped with a pyrolysis gas volume sensor; a carbon black cooling buffer bin is used to store the crude carbon black produced by the carbon slag / colloid particle co-pyrolysis and upgrading module; a carbon black high-value processing module is used to process the crude carbon black produced by the carbon slag / colloid particle co-pyrolysis and upgrading module to produce higher quality carbon black particles; high-quality carbon black is the carbon black particles produced after being processed by the carbon black high-value processing module; a flue gas purification module is respectively connected to the carbon black high-value processing module of the carbon slag / colloid particle co-pyrolysis and upgrading module to remove the waste flue gas generated after the combustion of pyrolysis oil and pyrolysis gas; a measurement and prediction control module obtains the pyrolysis oil of the pyrolysis oil condensation and separation module through the pyrolysis oil level sensor and obtains the non-condensable gas reserves in the non-condensable gas pressure-stabilizing gas storage cabinet through the pyrolysis gas volume sensor. The material amount in the material buffer bin is obtained through the mixed material weight sensor, the required mixing ratio of carbon slag and colloid particles is automatically calculated, and the carbon slag / colloid particle receiving and mixing module is controlled to adjust the mixing ratio of carbon slag and colloid particles, and the mixed material is automatically added to the material buffer bin through the material lifting module; the carbon slag / colloid particle receiving and mixing module includes, from top to bottom, a material bin that is interconnected, a material partition, an electric gate valve, a coaxial bidirectional spiral device, a colloid particle outlet, a carbon black outlet, a guide bin, a collision column, and a carbon slag / colloid particle mixed material buffer bin; the material bin is divided into two chambers by the material partition, one chamber is used to enter the colloid particle material, and the other chamber is used to enter the carbon slag material, and an electric gate valve is arranged at the lower part of the chamber on the side where the carbon slag material is entered, through the electric The gate valve is adjusted to control the flow area of the carbon slag material; the falling carbon slag and rubber particles are guided by the inclined plates on both sides of the guide bin, and the carbon slag and rubber particles fall along the guide bin and collide with the top of the collision column to mix, and then fall into the carbon slag / rubber particle mixed material buffer bin for temporary storage; the measurement and prediction control module includes a mixed material weight sensor, a pyrolysis oil level sensor, a pyrolysis gas volume sensor, an electric gate valve adjustment signal and a coaxial reverse spiral start signal; the measurement and prediction control module obtains the signals of the pyrolysis oil level sensor and the pyrolysis gas volume sensor, respectively obtains the current amount of pyrolysis oil and pyrolysis gas, calculates the time to continue to provide combustion, and controls the electric gate valve adjustment signal, adjusts the opening of the electric gate valve, and controls the mixing ratio of carbon slag and rubber particles;The pyrolysis oil and pyrolysis gas stored inside the pyrolysis oil condensation separation module and the non-condensable gas pressure stabilizing gas storage tank are used to ensure an elastic range during logic regulation and meet the energy reserve when the equipment restarts. The control logic is as follows: W 胶粒 = kW 碳渣 ; W 处理量 = W 碳渣 + kW 碳渣 ; Where: W 处理量 — Total pyrolysis amount of the pyrolysis system, kg / h; W 胶粒 — Treatment amount of rubber particles, kg / h; W 碳渣 — Carbon residue treatment capacity, kg / h; K — Ratio of rubber particles to carbon residue; Q 总能耗 =W 碳渣 P 碳渣 +kW 碳渣 P 胶粒 +Q 高值化 ; Where: Q 总能耗 — Total energy required for pyrolysis of W 胶粒 and W 碳渣 Total required energy, kJ / h; Q 高值化 — Energy required for the high-value conversion module of carbon black, kJ / h; P 碳渣 — Energy required for pyrolysis per unit weight of carbon residue, kJ / Kg; P 胶粒 — Energy required for pyrolysis per unit weight of rubber particles, kJ / Kg; W 碳渣 — Carbon residue treatment capacity, kg / h; K — Ratio of rubber particles to carbon residue; Q 产出 = W 碳渣 α1q 油 + kW 碳渣 α2q 油 + W 碳渣 β1q 气 + kW 碳渣 β2q 气 ; Where: α1—the pyrolysis oil yield corresponding to carbon slag, %; α2—the pyrolysis oil yield corresponding to colloidal particles, %; β1—the pyrolysis gas yield corresponding to carbon slag, %; β2—the pyrolysis gas yield corresponding to colloidal particles, %; q 油 —the calorific value of pyrolysis oil, kJ / Kg; q 气 —the calorific value of pyrolysis gas, kJ / Kg; W 碳渣 —the carbon slag treatment capacity, kg / h; K—the ratio of colloidal particles to carbon slag; Q 总能耗 ≈Q 产出 +Q 缓存 ; Where: Q 缓存 — Pyrolysis oil condensate separation module and non-condensable gas pressure stabilizing and gas storage tank stores pyrolysis oil and pyrolysis gas required for regulation; Q 产出 — Total energy of pyrolysis gas and pyrolysis oil produced after the mixed material of carbon slag and waste tire rubber particles passes through the carbon slag / rubber particle co-pyrolysis upgrading module.

2. A co-pyrolysis high-value resource utilization system for carbon slag and waste tire rubber particles according to claim 1, characterized in that, The coaxial bidirectional screw device includes a screw cylinder, a screw shaft and screw blades arranged in the screw cylinder. The middle of the coaxial bidirectional screw device is divided into two sections by a material partition plate. Positive and reverse screw blades are provided at both ends of the screw shaft located on the material partition plate, so that the rubber pellets fall from the rubber pellet outlet of the screw cylinder, and the carbon slag falls from the carbon black outlet.

3. A co-pyrolysis high-value resource utilization system for carbon slag and waste tire rubber particles according to claim 1, characterized in that, The carbon slag / rubber pellet co-pyrolysis and upgrading module includes a homogeneous pyrolysis screw, a high-temperature upgrading screw, a hot blast stove and a burner; both the homogeneous pyrolysis screw and the high-temperature upgrading screw are heated by the high-temperature flue gas from the hot blast stove, and the set temperature of the high-temperature upgrading screw is higher than the set temperature of the homogeneous pyrolysis screw; the high-temperature flue gas of the hot blast stove is generated after the pyrolysis oil condensed and separated by the pyrolysis oil condensation and separation module is burned by the burner.

4. A co-pyrolysis high-value resource utilization system for carbon slag and waste tire rubber particles according to claim 3, characterized in that, A material pusher is arranged between two second screw blades on the second screw shaft of the homogeneous pyrolysis screw. A total of 6-8 material pushers are provided on the second screw shaft of the homogeneous pyrolysis screw, and the material pushers are used to push the mixed material in the homogeneous pyrolysis screw.

5. A co-pyrolysis high-value resource utilization system for carbon slag and waste tire rubber particles according to claim 1, characterized in that, The non-condensable gas pressure stabilizing and storage tank adopts a floating plate design. The floating plate on the non-condensable gas pressure stabilizing and storage tank will float up and down with the change of the non-condensable gas volume in it, and feedback signals to the calculation and prediction control module through the pyrolysis gas volume sensor. The non-condensable gas stored in the non-condensable gas pressure stabilizing and storage tank is used as the fuel for the carbon black high-value treatment module.

6. A co-pyrolysis high-value resource utilization system for carbon slag and waste tire rubber particles according to claim 1, characterized in that, The carbon black high-value treatment module is used to carry out high-value treatment on the crude carbon black stored in the carbon black cooling and buffer bin and produce high-quality carbon black; an oil-gas dual-purpose burner is arranged in the carbon black high-value treatment module. The oil-gas dual-purpose burner uses the pyrolysis gas provided by the non-condensable gas pressure stabilizing and storage tank as fuel. When the pyrolysis gas reserve is insufficient, the pyrolysis oil provided by the pyrolysis oil condensation and separation module is used as fuel.

7. A method for the high-value resource utilization of co-pyrolysis of carbon slag and waste tire rubber particles, characterized in that, A co-pyrolysis and high-value resource utilization system for carbon slag and waste tire rubber pellets for implementing any one of claims 1-6 includes the following steps: Step 1, using the carbon slag / rubber pellet receiving and mixing module to mix carbon slag and rubber pellets into a uniformly mixed material; Step 2, the mixed material is sent to the material buffer bin for temporary storage under the action of the material lifting and conveying module; Step 3, the rubber pellets enter the carbon slag / rubber pellet co-pyrolysis and upgrading module from the material buffer bin, and high-temperature pyrolysis oil gas and pyrolysis crude carbon black are generated through the homogeneous pyrolysis screw and the high-temperature upgrading screw. The high-temperature pyrolysis oil gas leads to the pyrolysis oil condensation and separation module, and the pyrolysis crude carbon black leads to the carbon black cooling and buffer bin; Step 4, the high-temperature pyrolysis oil gas is divided into pyrolysis oil and non-condensable gas after passing through the pyrolysis oil condensation and separation module. The non-condensable gas enters the non-condensable gas pressure stabilizing and storage tank. The pyrolysis oil burns in the hot blast stove in the carbon slag / rubber pellet co-pyrolysis and upgrading module to provide heat for the co-pyrolysis of carbon slag / rubber pellets. The non-condensable gas goes to the carbon black high-value treatment module to provide heat for the high-value treatment of crude carbon black. When the pyrolysis gas volume sensor feedbacks that the non-condensable gas volume is insufficient, the rich waste pyrolysis oil is used in the carbon black high-value treatment module; Step 5, the pyrolysis crude carbon black enters the carbon black cooling and buffer bin for cooling and storage; Step 6, the crude carbon black enters the carbon black high-value treatment module for high-value treatment to produce high-quality carbon black particles; Step 7, the waste heat flue gas discharged from the carbon slag / carbon particle co-pyrolysis upgrading module and the carbon black high-value treatment module is passed through the flue gas purification module to remove NOx, SO2 and particulate matter in the flue gas, and then the clean flue gas is discharged through the chimney.

Images