A rap pretreatment method and system based on hot-cold energy double cycle recovery

Abstract

The application discloses a RAP pretreatment method and system based on hot-cold energy double cycle recovery, comprising the following steps: S1, obtaining pre-impurity removal material; S2, obtaining primary screening material; S3, carrying out first-stage preheating, first-stage crushing and first-stage screening on the primary screening material to obtain first material and second material; first-stage preheating further comprises first-stage heat energy recovery; S4, carrying out second-stage preheating and second-stage crushing on the second material, mixing the second material with the first material, and then carrying out second-stage screening to obtain third material and fourth material; second-stage preheating further comprises second-stage heat energy recovery; S5, carrying out low-temperature treatment, low-temperature shaping and third-stage screening on the fourth material; the low-temperature treatment temperature is-15 to-20 DEG C; low-temperature treatment further comprises cold energy recovery; and three kinds of RAP pretreatment materials with different particle size ranges are obtained. Through the fine pretreatment of hot-cold multistage and the hot-cold energy double cycle recovery, the performance of the RAP pretreatment material is improved, and the cost is saved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of road engineering materials, and particularly relates to a RAP pretreatment method and system based on heat-cold energy double-cycle recovery. BACKGROUND

[0002] In recent years, highway construction has shown a rapid development trend. As of the end of 2023, the total mileage of highways in China has reached 5.4368 million kilometers, of which the mileage of expressways has reached 0.1836 million kilometers, providing important support for economic and social development. However, with the gradual degradation of service performance during the operation period of highways and the demand for upgrading, the scale of periodic maintenance and reconstruction projects of roads continues to expand, resulting in a sharp increase in the production of waste pavement materials (RAP). At present, plant-mixed hot recycling technology, as the main RAP recycling method in China, still faces technical bottlenecks such as limited blending ratio due to material variability. Although fine recycling technology effectively reduces material variability by reducing RAP aggregation, the existing technical system still has key problems to be solved, such as incomplete processing, high energy consumption, and lack of energy recycling mechanism.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0004] In order to solve the above problems existing in the prior art, the application provides a RAP pretreatment method and system based on heat-cold energy double-cycle recovery. The technical problems to be solved by the application are solved by the following technical solutions:

[0005] In a first aspect, the application provides a RAP pretreatment method based on heat-cold energy double-cycle recovery, comprising the following steps:

[0006] S1, obtaining waste asphalt recycling material and removing impurities to obtain pre-impurity-removed material;

[0007] S2, pre-screening the pre-impurity-removed material to obtain pre-screening material with a particle size of R0 and storing it in a pre-screening material bin, 0 < R0 ≤ 40 mm;

[0008] S3, sequentially preheating, crushing and screening the pre-screening material to obtain first material with a particle size of R11 and second material with a particle size of R12, 0 < R11 ≤ 20 mm, 20 mm < R12 ≤ 40 mm; the first material is stored in a first material bin, and the second material is stored in a second material bin;

[0009] Wherein, the first preheating further comprises first heat energy recovery after the first preheating is completed;

[0010] S4, sequentially performing secondary preheating and secondary crushing on the second material, mixing the second material with the first material, and performing secondary screening to obtain third material with a particle size R21 and fourth material with a particle size R22, 0

[0011] The secondary preheating further comprises secondary heat energy recovery.

[0012] S5, performing low-temperature treatment, low-temperature shaping and tertiary screening on the fourth material, wherein the low-temperature treatment is performed at a temperature of-15 to-20℃ for 5 to 8 minutes, and the low-temperature treatment further comprises cold energy recovery.

[0013] obtaining fifth material with a particle size R31, sixth material with a particle size R32 and seventh material with a particle size R33, 0

[0014] In an embodiment of the present application, in step S3, the primary preheating and the primary heat energy recovery comprise: using a heat-cold energy double-circulation recovery module to regulate the primary preheating and the primary heat energy recovery; the heat-cold energy double-circulation recovery module comprises a control unit, a refrigeration device, a heating device, a waste heat storage device and a cold energy storage device; the control unit comprises a plurality of controllers, a plurality of temperature sensors and a plurality of temperature height time sensors.

[0015] The controllers are respectively arranged outside the primary screening material bin, the second material bin, the fourth material bin, the waste heat storage device and the cold energy storage device; the temperature sensors are respectively arranged inside the waste heat storage device and the cold energy storage device; and the temperature height time sensors are respectively arranged in the primary screening material bin, the second material bin and the fourth material bin.

[0016] The heat-cold energy double-circulation recovery module regulates the primary preheating and the primary heat energy recovery, comprising:

[0017] S31, the controller of the primary screening material bin receives a material height signal sent by the temperature height time sensor in the primary screening material bin, and when the material height meets the preset requirement, the controller of the primary screening material bin controls the heating device to preheat the primary screening material.

[0018] S32, according to the temperature signal and the time signal sent by the temperature height time sensor in the primary screening material bin, after the preheating at the preset temperature for the preset time is completed, the controller of the primary screening material bin controls the heating device to stop the primary preheating.

[0019] S33, after the first preheating stops, the heat medium used for the first preheating is recovered to the waste heat storage device;

[0020] S34, the controller of the primary screening material bin continues to receive the material height signal sent by the temperature altimeter time sensor in the primary screening material bin, when the material height meets the preset requirement again, the temperature signal sent by the temperature sensor is received through the controller of the waste heat storage device; if the heat medium in the waste heat storage device meets the first preheating temperature, the heat medium in the waste heat storage device is directly used for the preheating of the primary screening material; if the heat medium in the waste heat storage device does not meet the first preheating temperature, the heat medium in the waste heat storage device is input into the heating device for heating and then used for the preheating of the primary screening material; steps S32 to S34 are repeated until the material processing is completed.

[0021] In an embodiment of the present application, in step S4, the secondary preheating and the secondary heat energy recovery include: adopting a hot-cold energy double cycle recovery module to regulate and control the secondary preheating and the secondary heat energy recovery;

[0022] The regulation and control of the hot-cold energy double cycle recovery module on the secondary preheating and the secondary heat energy recovery includes:

[0023] S41, the controller of the second material bin receives the material height signal sent by the temperature altimeter time sensor in the second material bin, when the material height meets the preset requirement, the controller of the second material bin controls the heating device to preheat the second material;

[0024] S42, according to the temperature signal and the time signal sent by the temperature altimeter time sensor in the second material bin, after the preheating at the preset temperature is completed for the preset time, the controller of the second material bin controls the heating device to stop the secondary preheating;

[0025] S43, after the secondary preheating stops, the heat medium used for the secondary preheating is recovered to the waste heat storage device;

[0026] S44, the controller of the second material bin continues to receive the material height signal sent by the temperature altimeter time sensor in the second material bin, when the material height meets the preset requirement again, the temperature signal sent by the temperature sensor is received through the controller of the waste heat storage device; if the heat medium in the waste heat storage device meets the secondary preheating temperature, the heat medium in the waste heat storage device is directly used for the preheating of the second material; if the heat medium in the waste heat storage device does not meet the secondary preheating temperature, the heat medium in the waste heat storage device is input into the heating device for heating and then used for the preheating of the second material; steps S42 to S44 are repeated until the material processing is completed.

[0027] In an embodiment of the present application, in step S5, the low-temperature processing and the cold energy recovery include: adopting a hot-cold energy double cycle recovery module to regulate and control the low-temperature processing and the cold energy recovery;

[0028] The low-temperature treatment and cold energy recovery are regulated by the heat-cold energy double cycle recovery module, and the heat-cold energy double cycle recovery module comprises:

[0029] S51, the controller of the fourth material bin receives the material height signal sent by the temperature height timer sensor in the fourth material bin, and when the material height meets the preset requirement, the controller of the fourth material bin controls the refrigeration equipment to perform low-temperature treatment on the fourth material;

[0030] S52, according to the temperature signal and the time signal sent by the temperature height timer sensor in the fourth material bin, after the low-temperature treatment at the preset temperature for the preset time is completed, the controller of the fourth material bin controls the refrigeration equipment to stop the low-temperature treatment;

[0031] S53, after the low-temperature treatment is stopped, the refrigerant used for the low-temperature treatment is recovered to the cold energy storage equipment;

[0032] S54, the controller of the fourth material bin continues to receive the material height signal sent by the temperature height timer sensor in the fourth material bin, and when the material height meets the preset requirement again, the temperature signal sent by the temperature sensor is received through the controller of the cold energy storage equipment; if the refrigerant in the cold energy storage equipment meets the low-temperature treatment temperature, the refrigerant in the cold energy storage equipment is directly used for the low-temperature treatment of the fourth material; if the refrigerant in the cold energy storage equipment does not meet the low-temperature treatment temperature, the refrigerant in the cold energy storage equipment is input into the refrigeration equipment for cooling and then used for the low-temperature treatment of the fourth material; steps S52 to S54 are repeated until the material treatment is completed.

[0033] In an embodiment of the present application, the first preheating temperature is 110-130 DEG C, and the preheating time is 8-15 min; the second preheating temperature is 110-130 DEG C, and the preheating time is 8-15 min;

[0034] The heat medium is heat-conducting oil or water, and the refrigerant is ethylene glycol solution.

[0035] In a second aspect, the present application provides a RAP pretreatment system based on heat-cold energy double cycle recovery, comprising a heat-cold energy double cycle recovery module and a feed removal module, a preliminary screening module, a first treatment module, a second treatment module and a third treatment module connected in sequence.

[0036] The feed removal module is used for removing impurities from waste asphalt recycling material to obtain pre-impurity removal material;

[0037] The preliminary screening module is used for preliminary screening of the pre-impurity removal material to obtain preliminary screening material;

[0038] The primary processing module comprises a primary preheating unit, a primary heat energy recovery unit, a primary crushing unit and a primary screening unit; the primary preheating unit is used for preheating the primary screening material; the primary heat energy recovery unit is used for recovering the waste heat of the primary preheating unit; the primary crushing unit is used for crushing the primary screening material after preheating; and the primary screening unit is used for screening the primary screening material after primary crushing to obtain first material and second material; wherein the particle size of the first material is greater than 0 and less than or equal to 20 mm, and the particle size of the second material is greater than 20 mm and less than or equal to 40 mm.

[0039] The secondary processing module comprises a secondary preheating unit, a secondary heat energy recovery unit, a secondary crushing unit and a secondary screening unit; the secondary preheating unit is used for preheating the second material; the secondary heat energy recovery unit is used for recovering the waste heat of the secondary preheating unit; the secondary crushing unit is used for crushing the second material after preheating; and the secondary screening unit is used for screening the mixture of the first material and the second material after crushing to obtain third material and fourth material; wherein the particle size of the third material is greater than 0 and less than or equal to 5 mm, and the particle size of the fourth material is greater than 5 mm and less than or equal to 20 mm.

[0040] The tertiary processing module comprises a low-temperature processing unit, a cold energy recovery unit, a low-temperature shaping unit and a tertiary screening unit; the low-temperature processing unit is used for low-temperature processing of the fourth material, and the low-temperature processing is processing at a temperature of-15~-20℃ for 5~8 min; the cold energy recovery unit is used for recovering the cold energy of the low-temperature processing unit; the low-temperature shaping unit is used for shaping and crushing the fourth material after low-temperature processing in a low-temperature state; and the tertiary screening unit is used for screening the fourth material after shaping and crushing to obtain fifth material, sixth material and seventh material; wherein the particle size of the fifth material is greater than 0 and less than or equal to 5 mm, the particle size of the sixth material is greater than 5 mm and less than or equal to 10 mm, and the particle size of the seventh material is greater than 10 mm and less than or equal to 20 mm.

[0041] The heat-cold energy double-cycle recovery module is used for controlling and regulating the primary preheating unit, the primary heat energy recovery unit, the secondary preheating unit, the secondary heat energy recovery unit, the low-temperature processing unit and the cold energy recovery unit.

[0042] In an embodiment of the present application, the heat-cold energy double-cycle recovery module comprises a control unit, a refrigeration device, a heating device, a waste heat storage device and a cold energy storage device.

[0043] The heating device is communicated with the primary screening material bin storing the primary screening material and the second material bin storing the second material through a heat transfer pipeline, so that the heat medium heated by the heating device preheats the primary screening material and the second material through the heat transfer pipeline; the primary screening material bin and the second material bin are communicated with the waste heat storage device, so as to recover the waste heat after the primary screening material bin and the second material bin are preheated.

[0044] The refrigeration device is communicated with the fourth material bin storing the fourth material through a cold energy transfer pipeline, so that the refrigerant of the refrigeration device low-temperature processes the fourth material through the cold energy transfer pipeline; the fourth material bin is communicated with the cold energy storage device, so as to recover the cold energy after the fourth material bin is low-temperature processed.

[0045] The control unit comprises a plurality of controllers, a plurality of temperature sensors and a plurality of temperature altimeter time sensors.

[0046] The temperature sensors are arranged in the waste heat storage device and the cold energy storage device respectively, so as to obtain the temperature signals of the waste heat storage device and the cold energy storage device; the temperature altimeter time sensors are arranged in the primary screening material bin, the second material bin and the fourth material bin respectively, so as to obtain the temperature signals, the material height signals and the timing signals of the primary screening material bin, the second material bin and the fourth material bin; the controllers are arranged outside the primary screening material bin, the second material bin, the fourth material bin, the waste heat storage device and the cold energy storage device respectively, so as to receive the temperature signals of the waste heat storage device and the cold energy storage device, and receive the temperature signals, the material height signals and the timing signals of the primary screening material bin, the second material bin and the fourth material bin.

[0047] In an embodiment of the present application, the primary screening module comprises a primary screening device, the primary screening device is a single-layer heavy circular vibrating screen; the first screening unit comprises a first screening device, the second screening unit comprises a second screening device, and the first screening device and the second screening device are both double-layer high-frequency vibrating screens.

[0048] The third screening unit comprises a third screening device, the third screening device is a three-layer high-frequency vibrating screen; and the second screening device and the second screening device are both provided with ultrasonic devices.

[0049] In an embodiment of the present application, the first crushing unit comprises a first crushing device, the first crushing device is an eccentric crushing device; the second crushing unit comprises a second crushing device, and the second crushing device is a cone crushing device.

[0050] The low-temperature shaping unit comprises a low-temperature shaping device, and the low-temperature shaping device is a vertical shaft impact crusher.

[0051] In one embodiment of the present application, the refrigeration device comprises an evaporation pipe and a refrigerant located in the evaporation pipe, the outer surface of the evaporation pipe is in contact with the refrigerant for heat exchange; the heating device comprises an electric heating wire, a heat pump and a heat exchanger; the electric heating wire and the heat pump are used for heating the heat medium, and the heat exchanger is used for heat exchange;

[0052] The control unit further comprises a linkage controller; when the cold energy is insufficient during the low-temperature treatment, the linkage controller receives a linkage signal of the refrigeration device and transmits the linkage signal to the heating device, so that the heat exchanger of the heating device exchanges heat with the heat generated by the refrigeration device.

[0053] Compared with the prior art, the present application has the following advantages:

[0054] 1、The RAP pretreatment system provided by the present application can effectively remove large impurities in the RAP, thereby effectively ensuring the quality of the RAP. The material is sequentially subjected to one-stage preheating, crushing and screening, two-stage preheating, crushing and screening, and low-temperature shaping by using multi-stage processing modules, so that fine processing of the RAP is realized, and the phenomenon of pseudo coarse particles and particle agglomeration in the screened material can be greatly reduced. At the same time, the heat energy and cold energy in the preheating and low-temperature treatment are recycled by using a heat-cold energy double-cycle recycling module, so that the green, low-carbon and energy-saving effect is achieved, thereby avoiding the loss of heat and cold energy and improving the utilization efficiency of resources.

[0055] 2、The RAP pretreatment method provided by the present application controls the temperature gradient to alternately operate the preheating and drying (high temperature) and low-temperature treatment of RAP with different particle sizes, and combines heat and cold energy recycling to reduce the long-term cost of the RAP pretreatment method by optimizing energy consumption. At the same time, compared with separate heating treatment which is easy to cause secondary aging of old asphalt in RAP, separate low-temperature treatment which is easy to cause difficulty in removing water in RAP, thereby affecting the crushing and screening effect, the high-temperature and low-temperature alternating operation mode can soften and evaporate water in RAP in the heating stage, and can brittle the asphalt and ensure the integrity of the aggregate in the low-temperature stage, thereby reducing the generation of clumps and fine powder. In addition, the high-temperature and low-temperature alternating operation mode can reduce harmful gas and dust pollution, thereby significantly reducing carbon emissions. Therefore, the RAP pretreatment method provided by the present application not only realizes fine processing of RAP, but also improves energy utilization by recycling heat and cold energy, and improves the performance of the screened RAP by combining heat treatment and cold treatment, thereby reducing the impact on the environment.

[0056] 3、The present application improves the overall stability of the RAP pretreatment system through the linkage of the refrigeration device and the heating device and the redundant design of the heating device.

[0057] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of a RAP pretreatment system based on dual-cycle heat-cold energy recovery provided in an embodiment of the present invention;

[0059] Figure 2 This is a schematic diagram of the heat-cold energy dual-cycle recovery module provided in an embodiment of the present invention;

[0060] Figure 3 This is a schematic diagram of a RAP pretreatment method based on dual-cycle recovery of hot and cold energy provided in an embodiment of the present invention. Detailed Implementation

[0061] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following describes in detail a RAP pretreatment method and system based on heat-cold energy dual-cycle recovery proposed according to the present invention, in conjunction with the accompanying drawings and specific embodiments.

[0062] The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of specific embodiments in conjunction with the accompanying drawings. Through the description of the specific embodiments, a more in-depth and concrete understanding can be gained of the technical means and effects adopted by the present invention to achieve its intended purpose. However, the accompanying drawings are for reference and illustration only and are not intended to limit the technical solutions of the present invention.

[0063] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0064] The term “comprising” or any other variation is intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed.

[0065] This invention provides a RAP pretreatment system based on a dual-cycle heat-cold energy recovery system, see [link to relevant documentation]. Figure 1 The system includes a hot-cold energy dual-cycle recovery module and sequentially connected feeding and impurity removal modules, a primary screening module, a primary processing module, a secondary processing module, and a tertiary processing module.

[0066] The feeding impurity removal module is used for removing impurities from the waste asphalt recycling material to obtain pre-impurity removal material. The preliminary screening module is used for preliminary screening of the pre-impurity removal material to obtain preliminary screened material. The first-stage processing module includes a first-stage preheating unit, a first-stage heat energy recovery unit, a first-stage crushing unit, and a first-stage screening unit. The first-stage preheating unit is used for preheating the preliminary screened material; the first-stage heat energy recovery unit is used for heat energy recovery of the waste heat of the first-stage preheating unit; the first-stage crushing unit is used for crushing the preheated preliminary screened material; and the first-stage screening unit is used for screening the first-stage crushed preliminary screened material to obtain first material and second material; wherein the particle size of the first material is greater than 0 and less than or equal to 20 mm, and the particle size of the second material is greater than 20 mm and less than or equal to 40 mm.

[0067] The second-stage processing module includes a second-stage preheating unit, a second-stage heat energy recovery unit, a second-stage crushing unit, and a second-stage screening unit. The second-stage preheating unit is used for preheating the second material; the second-stage heat energy recovery unit is used for heat energy recovery of the waste heat of the second-stage preheating unit; the second-stage crushing unit is used for crushing the preheated second material; and the second-stage screening unit is used for screening the mixture of the first material and the crushed second material to obtain third material and fourth material; wherein the particle size of the third material is greater than 0 and less than or equal to 5 mm, and the particle size of the fourth material is greater than 5 mm and less than or equal to 20 mm.

[0068] The third-stage processing module includes a low-temperature processing unit, a cold energy recovery unit, a low-temperature shaping unit, and a third-stage screening unit. The low-temperature processing unit is used for low-temperature processing of the fourth material, which is processing for 5-8 min at a temperature of -15 to -20℃ (minus 15 to minus 20 degrees Celsius). The cold energy recovery unit is used for recovery of the cold energy of the low-temperature processing unit; the low-temperature shaping unit is used for shaping and crushing the fourth material after low-temperature processing in a low-temperature state; and the third-stage screening unit is used for screening the shaped and crushed fourth material to obtain fifth material, sixth material, and seventh material; wherein the particle size of the fifth material is greater than 0 and less than or equal to 5 mm, the particle size of the sixth material is greater than 5 mm and less than or equal to 10 mm, and the particle size of the seventh material is greater than 10 mm and less than or equal to 20 mm.

[0069] The heat-cold energy double-cycle recovery module is used for regulating and controlling the first-stage preheating unit, the first-stage heat energy recovery unit, the second-stage preheating unit, the second-stage heat energy recovery unit, the low-temperature processing unit, and the cold energy recovery unit.

[0070] The RAP pretreatment system provided by the application can effectively remove large impurities in the RAP, thereby effectively ensuring the quality of the RAP. The material is sequentially subjected to one-stage preheating, crushing and screening, two-stage preheating, crushing and screening and low-temperature shaping screening through the multi-stage processing modules, so that fine processing of the RAP is realized, and the pseudo coarse particles and particle agglomeration in the screened material can be greatly reduced. Meanwhile, the heat energy and cold energy in the preheating and low-temperature processing are recycled through the heat-cold energy double-circulation recycling module, so that the utilization efficiency of resources is improved.

[0071] For example, the temperature of the one-stage preheating is 110-130 DEG C, and the processing time is 8-15 min; the temperature of the two-stage preheating is 110-130 DEG C, and the processing time is 8-15 min; and the temperature of the low-temperature processing is-15--20 DEG C, and the processing time is 5-8 min. Through the preheating and drying and the low-temperature processing, the water content in the material is reduced, and the aging of the asphalt is avoided.

[0072] For example, the feeding and impurity removing module comprises a feeding device and an impurity removing device. The feeding device can be a vibrating feeding belt, and the impurity removing device can be an impurity removing machine. In this way, the waste asphalt recycling material is stably transmitted to the feeding end of the impurity removing machine through the vibrating feeding belt for impurity removal. The first discharging end of the impurity removing machine is in communication with the primary screening module, and the second discharging end of the impurity removing machine is in communication with the impurity collecting bin. The impurity removing machine can remove large impurities such as soil blocks, stone blocks, wood blocks and iron in the RAP, thereby effectively ensuring the quality of the subsequent fine screening of the RAP.

[0073] In one embodiment of the application, referring to Figure 2 The heat-cold energy double-circulation recycling module comprises a control unit, a refrigeration device, a heating device, a waste heat storage device and a cold energy storage device.

[0074] The heating device is in communication with the primary screening material bin for storing the primary screening material and the second material bin for storing the second material through a heat transfer pipeline, so that the heating medium heated by the heating device is used to preheat the primary screening material and the second material through the heat transfer pipeline. The primary screening material bin and the second material bin are in communication with the waste heat storage device, so as to recycle the waste heat after the preheating of the primary screening material bin and the second material bin.

[0075] The refrigeration device is in communication with the fourth material bin for storing the fourth material through a cold energy transfer pipeline, so that the refrigerant of the refrigeration device is used to perform low-temperature processing on the fourth material through the cold energy transfer pipeline; and the fourth material bin is in communication with the cold energy storage device, so as to recycle the cold energy after the low-temperature processing of the fourth material bin.

[0076] The control unit comprises a plurality of controllers, a plurality of temperature sensors and a plurality of temperature and height timing sensors. The temperature sensors are respectively arranged in the residual heat storage device and the cold energy storage device to obtain temperature signals of the residual heat storage device and the cold energy storage device. The temperature and height timing sensors are respectively arranged in the primary screening material bin, the second material bin and the fourth material bin to obtain temperature signals, material height signals and timing signals of the primary screening material bin, the second material bin and the fourth material bin. The controllers are respectively arranged outside the primary screening material bin, the second material bin, the fourth material bin, the residual heat storage device and the cold energy storage device to receive the temperature signals of the residual heat storage device and the cold energy storage device and to receive the temperature signals, the material height signals and the timing signals of the primary screening material bin, the second material bin and the fourth material bin. The controllers can determine whether the received signals meet the preset requirements, and then control the start or stop of the heating device, the refrigeration device, the residual heat storage device and the cold energy storage device.

[0077] In an example, the refrigeration device comprises an evaporation pipe and a refrigerant in the evaporation pipe, and an outer surface of the evaporation pipe is in contact with the refrigerant for heat exchange; the heating device comprises an electric heating wire, a heat pump and a heat exchanger; the electric heating wire and the heat pump are used for heating the refrigerant, and the heat exchanger is used for heat exchange. The control unit further comprises a linkage controller; the linkage controller is used for receiving a linkage signal of the refrigeration device when the cold energy is insufficient, and transmitting the linkage signal to the heating device to make the heat exchanger of the heating device exchange heat with the heat generated by the refrigeration device.

[0078] That is, based on the linkage controller, when the demand for cold energy increases, the heat generated by the refrigeration device during operation can be exchanged with the heat exchanger of the heating device. On the one hand, the heat exchanger absorbs the heat of the refrigeration device, thereby improving the refrigeration efficiency of the refrigeration device and increasing the refrigeration capacity. On the other hand, the heat obtained by the heat exchanger can also be used to heat the refrigerant in the heating device, thereby improving the utilization rate of heat resources. In this way, the linkage controller makes the refrigeration and heating achieve linkage and synergy. For example, the initial refrigerant entering the heating device is first absorbed by the heat exchanger to generate heat, and the preheated refrigerant is further heated to the required preheating temperature by the heat pump or the electric heating wire.

[0079] In this example, the heating device comprises an electric heating wire and a heat pump. Both the electric heating wire and the heat pump can be used to heat the refrigerant. Generally, the heat pump is used to heat the refrigerant, and the heat pump has high heating efficiency and is energy-saving. When the heat demand increases, the electric heating wire and the heat pump can be used to heat the refrigerant at the same time to meet the preheating demand. In this way, through the linkage of the refrigeration device and the heating device and the redundant design of the heating device, the overall stability of the RAP pretreatment system is improved.

[0080] In an example, the primary screening module comprises a primary screening device, which is a single-layer heavy-duty circular vibrating screen; the first screening unit comprises a first screening device, and the second screening unit comprises a second screening device, both of which are double-layer high-frequency vibrating screens. The third screening unit comprises a third screening device, which is a three-layer variable-frequency vibrating screen. The second screening device and the second screening device are both provided with ultrasonic devices, which can be used for mesh cleaning of 0-5 mm to prevent clogging.

[0081] In an example, the single-layer heavy-duty circular vibrating screen is provided with a screen hole size of 40 mm; the double-layer high-frequency vibrating screen for the first screening is provided with screen hole sizes of 20 mm and 40 mm from bottom to top; the double-layer high-frequency vibrating screen for the second screening is provided with screen hole sizes of 5 mm and 20 mm from bottom to top; the three-layer variable-frequency vibrating screen for the third screening is provided with screen hole sizes of 5 mm, 10 mm and 20 mm from bottom to top, and the vibration frequency of the three-layer variable-frequency vibrating screen is controlled by a variable-frequency motor.

[0082] For example, the single-layer heavy-duty circular vibrating screen, the double-layer high-frequency vibrating screen and the three-layer high-frequency vibrating screen are all provided with an inclination angle. That is, each vibrating screen has a certain angle between the screen surface and the horizontal plane to prevent material adhesion. Further, the single-layer heavy-duty circular vibrating screen, the double-layer high-frequency vibrating screen and the three-layer high-frequency vibrating screen are all sprayed with an anti-sticking coating, which is a polyurethane coating.

[0083] In an example, the first crushing unit comprises a first crushing device, which is an eccentric crushing device. The eccentric crushing device is used for coarse crushing of the 0-40 mm primary screening material after preheating and drying, and the dynamic jaw tooth shape is designed as a wave shape to reduce asphalt film adhesion.

[0084] In an example, the second crushing unit comprises a second crushing device, which is a cone crushing device. The cone crushing device is used for crushing the second material with a particle size of 20-40 mm after preheating and drying, and the lamination crushing makes the output particle size more uniform.

[0085] In an example, the low-temperature shaping unit comprises a low-temperature shaping device, which is a vertical shaft impact crusher. The vertical shaft impact crusher adopts a stone-on-stone mode to achieve shaping and crushing by material impact on an anvil. The vertical shaft impact crusher can project material by high-speed rotation of the rotor, strip aged asphalt film by collision between materials, and thus optimize the particle surface roughness and particle shape, and reduce excessive crushing. Further, the rotor linear speed can be dynamically adjusted according to the RAP asphalt aging degree, which can be generally set to 45-60 m / s. Further, the lining plate is designed with a groove to enhance the grinding effect on the material.

[0086] The embodiment of the present application also provides a RAP pretreatment method based on heat-cold energy double cycle recovery, referring to Figure 3 , comprising the following steps:

[0087] S1, obtaining waste asphalt recycling material and removing impurities to obtain pre-impurity removal material. This step can be specifically: the RAP obtained by milling is conveyed to the impurity removal machine feed end through the feed device, and the soil blocks, stone blocks, wood blocks, iron and the like contained in the RAP are removed, and the collected impurities are stored in the impurity collection bin.

[0088] S2, pre-impurity removal material is subjected to primary screening to obtain primary screening material with a particle size of R0 and store in the primary screening material bin, 0

[0089] S3, the primary screening material is sequentially subjected to primary preheating, primary crushing and primary screening to obtain first material with a particle size of R11 and second material with a particle size of R12, 0

[0090] Wherein, the primary preheating further includes primary heat energy recovery after the primary preheating is completed.

[0091] S4, the second material is sequentially subjected to secondary preheating, secondary crushing, mixed with the first material and subjected to secondary screening to obtain third material with a particle size of R21 and fourth material with a particle size of R22, 0

[0092] Wherein, the secondary preheating further includes secondary heat energy recovery after the secondary preheating is completed.

[0093] S5, the fourth material is subjected to low temperature treatment, low temperature shaping and tertiary screening, the low temperature treatment is at a temperature of-15~-20℃ for 5~8min; wherein, the low temperature treatment further includes cold energy recovery after the low temperature treatment is completed.

[0094] In this step, the fourth material is subjected to low temperature treatment to a preset temperature, and then subjected to low temperature treatment according to a preset time, and the treated fourth material is directly subjected to shaping operation in a low temperature state; the shaping operation includes crushing, size adjustment and shape adjustment and the like.

[0095] The fifth material with a particle size R31, the sixth material with a particle size R32 and the seventh material with a particle size R33 are obtained, 0 < R31 ≤ 5 mm, 5 < R32 ≤ 10 mm, and 10 < R33 ≤ 20 mm; the third material is mixed with the fifth material to obtain the RAP pretreatment material with three different particle size ranges. That is, three materials with different levels of fine screening are obtained, the particle size of the first level material is greater than 0 and less than or equal to 5 mm, the particle size of the second level material is greater than 5 mm and less than or equal to 10 mm, and the particle size of the third level material is greater than 10 mm and less than or equal to 20 mm.

[0096] The RAP pretreatment method provided by the application reduces the long-term cost of the RAP pretreatment method by optimizing energy consumption through temperature gradient control, alternating preheating and drying (high temperature) and low temperature treatment of RAP materials with different particle sizes, and combining heat and cold energy recovery. At the same time, compared with separate heating treatment which is easy to cause secondary aging of old asphalt in RAP, separate low temperature treatment which is easy to cause difficulty in removing moisture in RAP, and thus affects the crushing and screening effect, the high temperature and low temperature alternating operation mode can soften and evaporate moisture in RAP in the heating stage, and can brittle the asphalt and ensure the integrity of the aggregate in the low temperature stage, thereby reducing the generation of clumps and fine powder. In addition, the high temperature and low temperature alternating operation mode can reduce harmful gas and dust pollution, thereby significantly reducing carbon emissions. In this way, the RAP pretreatment method provided by the application not only realizes fine treatment of RAP, but also improves energy utilization by recycling heat and cold energy, and improves the performance of the screened RAP by combining heat treatment and cold treatment, thereby reducing the impact on the environment.

[0097] For example, the first-stage preheating temperature is 110-130℃, and the second-stage preheating temperature is 110-130℃.

[0098] For example, the heat medium is heat-conducting oil or water, and the cold medium is ethylene glycol solution.

[0099] In an embodiment of the application, in step S3, the first-stage preheating and first-stage heat energy recovery include: using a heat-cold energy double-cycle recovery module to regulate and control the first-stage preheating and first-stage heat energy recovery; the heat-cold energy double-cycle recovery module includes a control unit, a refrigeration device, a heating device, a waste heat storage device and a cold energy storage device; the control unit includes a plurality of controllers, a plurality of temperature sensors and a plurality of temperature altimeter time sensors;

[0100] The controllers are respectively arranged outside the primary screening material bin, the second material bin, the fourth material bin, the waste heat storage device and the cold energy storage device; the temperature sensors are respectively arranged inside the waste heat storage device and the cold energy storage device; and the temperature altimeter time sensors are respectively arranged in the primary screening material bin, the second material bin and the fourth material bin.

[0101] Using the heat-cold energy double-cycle recovery module to regulate and control the first-stage preheating and first-stage heat energy recovery includes:

[0102] S31, the controller of the primary screening material bin receives the material height signal sent by the temperature height timer sensor in the primary screening material bin, and when the material height meets the preset requirement, the controller of the primary screening material bin controls the heating device to preheat the primary screening material;

[0103] S32, according to the temperature signal and the time signal sent by the temperature height timer sensor in the primary screening material bin, after preheating at the preset temperature for the preset time, the controller of the primary screening material bin controls the heating device to stop the first-stage preheating;

[0104] S33, after the first-stage preheating is stopped, the heat medium used for the first-stage preheating is recycled to the waste heat storage device;

[0105] S34, the controller of the primary screening material bin continues to receive the material height signal sent by the temperature height timer sensor in the primary screening material bin, and when the material height meets the preset requirement again, the temperature signal sent by the temperature sensor is received through the controller of the waste heat storage device; if the heat medium in the waste heat storage device meets the first-stage preheating temperature, the heat medium in the waste heat storage device is directly used for preheating the primary screening material; if the heat medium in the waste heat storage device does not meet the first-stage preheating temperature, the heat medium in the waste heat storage device is input into the heating device for heating and then used for preheating the primary screening material; steps S32 to S34 are repeated until the material processing is completed.

[0106] In an embodiment of the present application, in step S4, the second-stage preheating and the second-stage heat energy recycling include: using a heat-cold energy double-cycle recycling module to regulate and control the second-stage preheating and the second-stage heat energy recycling, and the regulation and control specifically includes:

[0107] S41, the controller of the second material bin receives the material height signal sent by the temperature height timer sensor in the second material bin, and when the material height meets the preset requirement, the controller of the second material bin controls the heating device to preheat the second material;

[0108] S42, according to the temperature signal and the time signal sent by the temperature height timer sensor in the second material bin, after preheating at the preset temperature for the preset time, the controller of the second material bin controls the heating device to stop the second-stage preheating;

[0109] S43, after the second-stage preheating is stopped, the heat medium used for the second-stage preheating is recycled to the waste heat storage device;

[0110] S44, the controller of the second material bin continues to receive the material height signal sent by the temperature height timer sensor in the second material bin, when the material height meets the preset requirement again, the temperature signal sent by the temperature sensor is received through the controller of the waste heat storage device; if the heat medium in the waste heat storage device meets the secondary preheating temperature, the heat medium in the waste heat storage device is directly used for preheating of the second material; if the heat medium in the waste heat storage device does not meet the secondary preheating temperature, the heat medium in the waste heat storage device is input into the heating device for heating and then used for preheating of the second material; steps S42 to S44 are repeated until the material processing is completed.

[0111] In an embodiment of the present application, in step S5, the low-temperature treatment and cold energy recovery include: using a heat-cold energy double-cycle recovery module to regulate the low-temperature treatment and cold energy recovery, and the regulation specifically includes:

[0112] S51, the controller of the fourth material bin receives the material height signal sent by the temperature height timer sensor in the fourth material bin, and when the material height meets the preset requirement, the controller of the fourth material bin controls the refrigeration device to perform low-temperature treatment on the fourth material;

[0113] S52, according to the temperature signal and the time signal sent by the temperature height timer sensor in the fourth material bin, after the low-temperature treatment at the preset temperature for the preset time is completed, the controller of the fourth material bin controls the refrigeration device to stop the low-temperature treatment;

[0114] S53, after the low-temperature treatment is stopped, the cold medium used for the low-temperature treatment is recovered to the cold energy storage device;

[0115] S54, the controller of the fourth material bin continues to receive the material height signal sent by the temperature height timer sensor in the fourth material bin, and when the material height meets the preset requirement again, the temperature signal sent by the temperature sensor is received through the controller of the cold energy storage device; if the cold medium in the cold energy storage device meets the low-temperature treatment temperature, the cold medium in the cold energy storage device is directly used for low-temperature treatment of the fourth material; if the cold medium in the cold energy storage device does not meet the low-temperature treatment temperature, the cold medium in the cold energy storage device is input into the refrigeration device for cooling and then used for low-temperature treatment of the fourth material; steps S52 to S54 are repeated until the material processing is completed.

[0116] The present application adopts the RAP fine pretreatment process and the heat-cold energy double-cycle recovery technology, can effectively reduce the agglomeration phenomenon of RAP, ensure the high-quality grading treatment of RAP, and effectively recycle and utilize waste heat and cold air, so as to achieve the energy-saving effect, and further avoid the energy loss in the air of nature, causing unnecessary energy waste, and further save the cost of the pretreatment of RAP.

[0117] The above is further detailed description of the present application in combination with specific preferred embodiments, and cannot be deemed as limitation of the specific implementation of the present application to these descriptions. For those skilled in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, and all should be deemed as falling within the protection scope of the present application.

Claims

1. A RAP pretreatment method based on dual-cycle heat-cold energy recovery, characterized in that, Includes the following steps: S1. Obtain waste asphalt recycling material and remove impurities to obtain pre-removed material; S2. Perform a primary screening on the pre-removed impurity material to obtain a primary screening material with a particle size of R0 and store it in the primary screening material silo, where 0 < R0 ≤ 40 mm. S3. The primary screened material is subjected to primary preheating, primary crushing and primary screening in sequence to obtain a first material with a particle size of R11 and a second material with a particle size of R12, where 0 < R11 ≤ 20 mm and 20 mm < R12 ≤ 40 mm; the first material is stored in the first material silo and the second material is stored in the second material silo. The process includes a first-stage heat recovery stage after the first-stage preheating is completed. The primary preheating and primary heat recovery include: using a heat-cold energy dual-cycle recovery module to regulate the primary preheating and primary heat energy recovery; the heat-cold energy dual-cycle recovery module includes a control unit, refrigeration equipment, heating equipment, waste heat storage equipment, and cold energy storage equipment; the control unit includes multiple controllers, multiple temperature sensors, and multiple temperature and altitude timing sensors; The controllers are respectively installed outside the primary screening material bin, the second material bin, the fourth material bin, the waste heat storage device, and the cold energy storage device; the temperature sensors are respectively installed inside the waste heat storage device and the cold energy storage device; the temperature and height timing sensors are respectively installed in the primary screening material bin, the second material bin, and the fourth material bin. The regulation of primary preheating and primary heat recovery using a dual-cycle heat-cold energy recovery module includes: S31. The controller of the primary screening material silo receives the material height signal from the temperature and height timing sensor in the primary screening material silo. When the material height meets the preset requirements, the controller of the primary screening material silo controls the heating equipment to preheat the primary screening material. S32. Based on the temperature and time signals emitted by the temperature and time sensors in the primary screening material silo, after preheating for a preset time at a preset temperature, the controller of the primary screening material silo controls the heating equipment to stop the first-stage preheating. S33. After the first-stage preheating stops, the heat medium used for the first-stage preheating will be recovered to the waste heat storage device. S34. The controller of the primary screening material silo continues to receive the material height signal from the temperature and height timing sensor in the primary screening material silo. When the material height meets the preset requirements again, the controller of the waste heat storage device receives the temperature signal from the temperature sensor. If the heat medium in the waste heat storage device meets the first-stage preheating temperature, the heat medium in the waste heat storage device is directly used for preheating the primary screening material. If the heat medium in the waste heat storage device does not meet the first-stage preheating temperature, the heat medium in the waste heat storage device is input into the heating equipment for heating and then used for preheating the primary screening material. Repeat steps S32 to S34 until the material processing is completed. S4. After the second material is subjected to secondary preheating and secondary crushing, it is mixed with the first material and then subjected to secondary screening to obtain a third material with a particle size of R21 and a fourth material with a particle size of R22, where 0 < R21 ≤ 5 mm and 5 < R22 ≤ 20 mm; the third material is stored in the third material silo and the fourth material is stored in the fourth material silo. The process includes secondary heat recovery after the secondary preheating is completed. S5. The fourth material is subjected to low-temperature treatment, low-temperature shaping and three-stage screening. The low-temperature treatment is carried out at a temperature of -15 to -20°C for 5 to 8 minutes. After the low-temperature treatment is completed, cold energy recovery is also included. Obtain a fifth material with a particle size of R31, a sixth material with a particle size of R32, and a seventh material with a particle size of R33, where 0 < R31 ≤ 5 mm, 5 < R32 ≤ 10 mm, and 10 < R33 ≤ 20 mm; mix the third material with the fifth material to obtain three RAP pretreatment materials with different particle size ranges.

2. The RAP pretreatment method based on dual-cycle heat-cold energy recovery according to claim 1, characterized in that, In step S4, the secondary preheating and the secondary heat recovery include: using a heat-cold energy dual-cycle recovery module to regulate the secondary preheating and the secondary heat recovery; The control of secondary preheating and secondary heat recovery using a dual-cycle heat-cold energy recovery module includes: S41. The controller of the second material silo receives the material height signal from the temperature and height timing sensor in the second material silo. When the material height meets the preset requirements, the controller of the second material silo controls the heating equipment to preheat the second material. S42. Based on the temperature and time signals emitted by the temperature and time sensors in the second material silo, after preheating for a preset time at a preset temperature, the controller of the second material silo controls the heating equipment to stop the secondary preheating. S43. After the secondary preheating stops, the heat medium used for secondary preheating will be recovered to the waste heat storage device. S44. The controller of the second material silo continues to receive the material height signal from the temperature and height timing sensor in the second material silo. When the material height meets the preset requirements again, the controller of the waste heat storage device receives the temperature signal from the temperature sensor. If the heat medium in the waste heat storage device meets the secondary preheating temperature, the heat medium in the waste heat storage device is directly used for the preheating of the second material. If the heat medium in the waste heat storage device does not meet the secondary preheating temperature, the heat medium in the waste heat storage device is input into the heating device for heating and then used for the preheating of the second material. Repeat steps S42 to S44 until the material processing is completed.

3. The RAP pretreatment method based on dual-cycle heat-cold energy recovery according to claim 1, characterized in that, In step S5, the low-temperature treatment and the cold energy recovery include: using a heat-cold energy dual-cycle recovery module to regulate the low-temperature treatment and cold energy recovery; The use of a dual-cycle heat-cold energy recovery module to regulate low-temperature treatment and cold energy recovery includes: S51. The controller of the fourth material silo receives the material height signal from the temperature and height timing sensor in the fourth material silo. When the material height meets the preset requirements, the controller of the fourth material silo controls the refrigeration equipment to perform low-temperature treatment on the fourth material. S52. Based on the temperature and time signals emitted by the temperature and time sensors in the fourth material silo, after completing the low-temperature treatment for a preset time at the preset temperature, the controller of the fourth material silo controls the refrigeration equipment to stop the low-temperature treatment. S53. After the cryogenic treatment is stopped, the refrigerant used for cryogenic treatment will be recovered to the cold energy storage device. S54. The controller of the fourth material silo continues to receive the material height signal from the temperature and height timing sensor in the fourth material silo. When the material height meets the preset requirements again, the controller of the cold energy storage device receives the temperature signal from the temperature sensor. If the refrigerant in the cold energy storage device meets the low-temperature treatment temperature, the refrigerant in the cold energy storage device is directly used for the low-temperature treatment of the fourth material. If the refrigerant in the cold energy storage device does not meet the low-temperature treatment temperature, the refrigerant in the cold energy storage device is input into the refrigeration equipment to cool down and then used for the low-temperature treatment of the fourth material. Repeat steps S52 to S54 until the material treatment is completed.

4. The RAP pretreatment method based on dual-cycle heat-cold energy recovery according to claim 3, characterized in that, The temperature of the first-stage preheating is 110–130°C, and the preheating time is 8–15 min; the temperature of the second-stage preheating is 110–130°C, and the preheating time is 8–15 min. The heat transfer medium is heat transfer oil or water, and the coolant is an ethylene glycol solution.

5. A RAP pretreatment system based on dual-cycle heat-cold energy recovery, characterized in that, It includes a heat-cold energy dual-cycle recovery module and a feeding and impurity removal module, a primary screening module, a primary processing module, a secondary processing module and a tertiary processing module connected in sequence; The feeding and impurity removal module is used to remove impurities from waste asphalt recycling material to obtain pre-impurity removed material; The primary screening module is used to perform primary screening on the pre-purified materials to obtain the primary screened materials. The primary processing module includes a primary preheating unit, a primary heat recovery unit, a primary crushing unit, and a primary screening unit. The primary preheating unit is used to preheat the material screened at the primary level. The primary heat recovery unit is used to recover the waste heat from the primary preheating unit. The primary crushing unit is used to crush the preheated material screened at the primary level. The primary screening unit is used to screen the crushed material screened at the primary level to obtain a first material and a second material. The first material has a particle size greater than 0 and less than or equal to 20 mm, and the second material has a particle size greater than 20 mm and less than or equal to 40 mm. The secondary processing module includes a secondary preheating unit, a secondary heat recovery unit, a secondary crushing unit, and a secondary screening unit. The secondary preheating unit is used to preheat the second material. The secondary heat recovery unit is used to recover the waste heat from the secondary preheating unit. The secondary crushing unit is used to crush the preheated second material. The secondary screening unit is used to screen the mixture of the first material and the crushed second material to obtain a third material and a fourth material. The third material has a particle size greater than 0 and less than or equal to 5 mm, and the fourth material has a particle size greater than 5 mm and less than or equal to 20 mm. The three-stage processing module includes a low-temperature treatment unit, a cold energy recovery unit, a low-temperature shaping unit, and a three-stage screening unit. The low-temperature treatment unit is used to treat the fourth material at a low temperature of -15 to -20°C for 5 to 8 minutes. The cold energy recovery unit is used to recover the cold energy from the low-temperature treatment unit. The low-temperature shaping unit is used to shape and crush the fourth material after low-temperature treatment at a low temperature. The three-stage screening unit is used to screen the shaped and crushed fourth material to obtain a fifth, a sixth, and a seventh material. The fifth material has a particle size greater than 0 and less than or equal to 5 mm, the sixth material has a particle size greater than 5 mm and less than or equal to 10 mm, and the seventh material has a particle size greater than 10 mm and less than or equal to 20 mm. The heat-cold energy dual-cycle recovery module is used to regulate the primary preheating unit, primary heat energy recovery unit, secondary preheating unit, secondary heat energy recovery unit, low-temperature treatment unit, and cold energy recovery unit.

6. The RAP pretreatment system based on dual-cycle heat-cold energy recovery according to claim 5, characterized in that, The heat-cold energy dual-cycle recovery module includes a control unit, a refrigeration device, a heating device, a waste heat storage device, and a cold energy storage device; The heating equipment is connected to both the primary screening material storage bin and the second material storage bin via a heat transfer pipe, so that the heat medium heated by the heating equipment can preheat the primary screening material and the second material respectively through the heat transfer pipe; the primary screening material bin and the second material bin are both connected to the waste heat storage equipment, so as to recover the waste heat after preheating of the primary screening material bin and the second material bin. The refrigeration equipment is connected to the fourth material silo storing the fourth material through a cold energy transmission pipeline, so that the refrigerant of the refrigeration equipment can be used to treat the fourth material at low temperature through the cold energy transmission pipeline; the fourth material silo is connected to a cold energy storage device for recovering the cold energy after the fourth material silo has been treated at low temperature. The control unit includes multiple controllers, multiple temperature sensors, and multiple temperature and altitude timing sensors; The temperature sensors are respectively installed inside the waste heat storage device and the cold energy storage device to acquire temperature signals from the waste heat storage device and the cold energy storage device; the temperature, height, and timing sensors are respectively installed in the primary screening material bin, the second material bin, and the fourth material bin to acquire temperature signals, material height signals, and timing signals from the primary screening material bin, the second material bin, and the fourth material bin; the controller is respectively installed outside the primary screening material bin, the second material bin, the fourth material bin, the waste heat storage device, and the cold energy storage device to receive temperature signals from the waste heat storage device and the cold energy storage device, as well as to receive temperature signals, material height signals, and timing signals from the primary screening material bin, the second material bin, and the fourth material bin.

7. The RAP pretreatment system based on dual-cycle heat-cold energy recovery according to claim 5 or 6, characterized in that, The primary screening module includes a primary screening device, which is a single-layer heavy-duty circular vibrating screen; the first-stage screening unit includes a first-stage screening device, and the second-stage screening unit includes a second-stage screening device, both of which are double-layer high-frequency vibrating screens. The three-stage screening unit includes a three-stage screening device, which is a three-layer high-frequency vibrating screen; both the secondary screening device and the secondary screening device are equipped with ultrasonic devices.

8. The RAP pretreatment system based on dual-cycle heat-cold energy recovery according to claim 5 or 6, characterized in that, The primary crushing unit includes a primary crushing device, which is a jaw crusher; the secondary crushing unit includes a secondary crushing device, which is a cone crusher. The low-temperature shaping unit includes a low-temperature shaping device, which is a vertical shaft impact crusher.

9. The RAP pretreatment system based on dual-cycle heat-cold energy recovery according to claim 6, characterized in that, The refrigeration equipment includes an evaporator and a refrigerant located inside the evaporator, the outer surface of the evaporator being in contact with the refrigerant for heat exchange; the heating equipment includes an electric heating wire, a heat pump, and a heat exchanger; the electric heating wire and the heat pump are used to heat the heat medium, and the heat exchanger is used to perform heat exchange; The control unit also includes a linkage controller; the linkage controller is used to receive the linkage signal of the refrigeration equipment when the cooling capacity is insufficient in the low temperature treatment, and transmit the linkage signal to the heating equipment so that the heat exchanger of the heating equipment can exchange heat with the heat generated by the refrigeration equipment.

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