RAP preprocessing method and system based on heat-cold energy dual-cycle recovery

Abstract

The invention discloses an RAP pretreatment method and system based on heat-cold energy double-circulation recovery. The RAP pretreatment method comprises the steps that S1, a pre-impurity-removal material is obtained; s2, obtaining a primarily screened material; s3, performing primary preheating, primary crushing and primary screening on the primarily screened material to obtain a first material and a second material; after the first-stage preheating, first-stage heat energy recovery is carried out; s4, the second material is subjected to second-stage preheating and second-stage crushing and then mixed with the first material, second-stage screening is carried out, a third material and a fourth material are obtained, and second-stage heat energy recovery is carried out after second-stage preheating; s5, the fourth material is subjected to low-temperature treatment, low-temperature shaping and three-stage screening, and the low-temperature treatment temperature ranges from-15 DEG C to-20 DEG C; cold energy recovery is carried out after low-temperature treatment; and three RAP pretreated materials with different particle size ranges are obtained. And through hot-cold multi-stage refined pretreatment and hot-cold energy double-circulation recovery, the performance of RAP pretreatment materials is improved, and the cost is saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of road engineering materials, and in particular relates to a RAP pretreatment method and system based on heat-cold energy dual-cycle recovery. Background Art

[0002] Highway construction has shown rapid development in recent years. By the end of 2023, the total mileage of highways in China had reached 5.4368 million kilometers, of which 183,600 kilometers were expressways, providing important support for economic and social development. However, with the gradual decline in highway service performance during operation and the need for quality upgrades, the scale of periodic road maintenance and renovation projects has continued to expand, resulting in a sharp increase in the generation of waste pavement materials (RAP). Currently, factory-mixed hot recycling technology, as the mainstream RAP recycling method in China, still faces technical bottlenecks such as limited mixing ratios due to material variability. Although refined recycling technology has effectively reduced material variability by reducing RAP agglomeration, the existing technology system still has key issues that need to be addressed, such as incomplete treatment, high energy consumption, and a lack of energy recycling mechanisms.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a RAP pretreatment method and system based on heat-cold energy dual-cycle recovery. The technical problem to be solved by the present invention is achieved through the following technical solutions: In a first aspect, the present invention provides a RAP pretreatment method based on heat-cold energy dual cycle recovery, comprising the following steps: S1. Obtaining waste asphalt recycling material and removing impurities to obtain pre-removed impurity material; S2. Preliminary screening is performed on the pre-cleaned material to obtain the pre-screened material with a particle size of R0 and store it in the pre-screened material bin, 0<R0≤40mm; S3, sequentially performing primary preheating, primary crushing, and primary screening on the pre-screened material 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 a first material bin, and the second material is stored in a second material bin; Wherein, after the first stage preheating is completed, the first stage heat energy recovery is also included; S4, performing secondary preheating and secondary crushing on the second material, mixing it with the first material and performing 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 a third material bin, and the fourth material is stored in a fourth material bin; Wherein, after the secondary preheating is completed, the secondary heat energy recovery is also included; S5, performing low-temperature treatment, low-temperature shaping and three-stage screening on the fourth material, wherein the low-temperature treatment is performed at a temperature of -15 to -20°C for 5 to 8 minutes; wherein the low-temperature treatment also includes cold energy recovery; 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 are obtained, 0<R31≤5mm, 5<R32≤10mm, 10<R33≤20mm; the third material is mixed with the fifth material to obtain three RAP pretreated materials with different particle size ranges.

[0005] In one embodiment of the present invention, in step S3, the primary preheating and the primary heat energy recovery include: using a heat-cold energy dual-cycle recovery module to regulate the primary preheating and the primary heat energy recovery; 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 control unit includes multiple controllers, multiple temperature sensors, and multiple temperature and altitude timing sensors; 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; the temperature and height timing sensors are respectively arranged in the primary screening material bin, the second material bin and the fourth material bin; The use of the heat-cold energy dual-cycle recovery module to regulate the primary preheating and primary heat energy recovery includes: S31. The controller of the primary screening material bin receives a material height signal from a temperature and height timing sensor in the primary screening material bin. When the material height meets the preset requirement, the controller of the primary screening material bin controls the heating equipment to preheat the primary screening material. S32, according to the temperature signal and time signal sent by the temperature height timing sensor in the primary screening material bin, after completing the 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-level preheating; S33, after the first-stage preheating stops, the heat medium used for the first-stage preheating is recovered to the waste heat storage device; S34. The controller of the primary screening material bin continues to receive the material height signal emitted by the temperature height timing sensor in the primary screening material bin. When the material height meets the preset requirements again, the controller of the waste heat storage device receives the temperature signal emitted by the temperature sensor. If the heat medium in the waste heat storage device meets the first-level 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-level 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. Repeat steps S32 to S34 until the material processing is completed.

[0006] In one embodiment of the present invention, in step S4, the secondary preheating and the secondary heat energy recovery include: regulating the secondary preheating and the secondary heat energy recovery using a heat-cold energy dual-cycle recovery module; The use of the heat-cold energy dual-cycle recovery module to regulate the secondary preheating and secondary heat energy recovery includes: S41, the controller of the second material bin receives a material height signal from a temperature and height timing sensor in the second material bin. When the material height meets a preset requirement, the controller of the second material bin controls the heating device to preheat the second material. S42, according to the temperature signal and time signal sent by the temperature height timing sensor in the second material bin, after the preheating is completed at the preset temperature for the preset time, the controller of the second material bin controls the heating device to stop the secondary preheating; S43, after the secondary preheating stops, the heat medium used for the secondary preheating is recovered to the waste heat storage device; S44. The controller of the second material bin continues to receive the material height signal emitted by the temperature height timing sensor in the second material bin. When the material height meets the preset requirements again, the controller of the waste heat storage device receives the temperature signal emitted by 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 preheating 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 the second material. Repeat steps S42 to S44 until the material processing is completed.

[0007] In one embodiment of the present invention, in step S5, the low-temperature treatment and the cold energy recovery include: regulating the low-temperature treatment and the cold energy recovery using a heat-cold energy dual-cycle recovery module; The heat-cold energy dual cycle recovery module is used to regulate low temperature treatment and cold energy recovery, including: S51, the controller of the fourth material bin receives a material height signal sent by a temperature and height timing sensor in the fourth material bin. When the material height meets a preset requirement, the controller of the fourth material bin controls the refrigeration equipment to perform low-temperature treatment on the fourth material. S52: After completing the low-temperature treatment at a preset temperature for a preset time, the controller of the fourth material bin controls the refrigeration equipment to stop the low-temperature treatment according to the temperature signal and time signal sent by the temperature height timing sensor in the fourth material bin; S53, after the low-temperature treatment is stopped, the refrigerant used for the low-temperature treatment is recovered to the cold energy storage device; S54, the controller of the fourth material bin continues to receive the material height signal emitted by the temperature height timing sensor in the fourth material bin. When the material height meets the preset requirements again, the temperature signal emitted by the temperature sensor is received by the controller of the cold energy storage device. 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 device for cooling and then used for the low-temperature treatment of the fourth material. Repeat steps S52 to S54 until the material processing is completed.

[0008] In one embodiment of the present invention, the primary preheating temperature is 110-130° C., and the preheating time is 8-15 minutes; the secondary preheating temperature is 110-130° C., and the preheating time is 8-15 minutes; The heat medium is heat transfer oil or water, and the coolant is ethylene glycol solution.

[0009] In a second aspect, the present invention provides a RAP pretreatment system based on heat-cold energy dual-cycle recovery, comprising a heat-cold energy dual-cycle recovery module and a feed impurity removal module, a primary screening module, a primary treatment module, a secondary treatment module, and a tertiary treatment module connected in sequence; The feed impurity removal module is used to remove impurities from the waste asphalt recycling material to obtain pre-impurity-removed material; The primary screening module is used to perform primary screening on the pre-cleaned material to obtain the primary screened material; 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 primary screened material; the primary heat recovery unit is used to recover the waste heat of the primary preheating unit; the primary crushing unit is used to crush the preheated primary screened material; the primary screening unit is used to screen the primary screened material after the primary crushing to obtain a first material and a 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; 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 of 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; 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; The three-stage processing module includes a low-temperature processing unit, a cold energy recovery unit, a low-temperature shaping unit and a three-stage screening unit; the low-temperature processing unit is used to perform low-temperature processing on the fourth material, and the low-temperature processing is performed at a temperature of -15 to -20°C for 5 to 8 minutes; the cold energy recovery unit is used to recover the cold energy of the low-temperature processing unit; the low-temperature shaping unit is used to shape and crush the fourth material after low-temperature processing under low-temperature conditions; the three-stage screening unit is used to screen the fourth material after shaping and crushing to obtain a fifth material, a sixth material and a 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; The heat-cold energy dual-cycle recovery module is used to regulate the primary preheating unit, the primary heat energy recovery unit, the secondary preheating unit, the secondary heat energy recovery unit, the low-temperature treatment unit and the cold energy recovery unit.

[0010] In one embodiment of the present invention, 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 device is connected to 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 respectively through the heat transfer pipeline; the primary screening material bin and the second material bin are both connected to the waste heat storage device, 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 a fourth material bin storing a fourth material through a cold energy transmission pipeline, so that the refrigerant of the refrigeration equipment performs low-temperature treatment on the fourth material through the cold energy transmission pipeline; the fourth material bin is connected to the cold energy storage device, so as to recover the cold energy after the low-temperature treatment in the fourth material bin; The control unit includes a plurality of controllers, a plurality of temperature sensors and a plurality of temperature-altitude timing sensors; The temperature sensors are respectively arranged inside the waste heat storage device and the cold energy storage device, and are used to obtain the temperature signals of the waste heat storage device and the cold energy storage device; the temperature height timing sensors are respectively arranged in the primary screening material bin, the second material bin and the fourth material bin, and are used to obtain the 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 waste heat storage device and the cold energy storage device, and are used to receive the temperature signals of the waste heat storage device and the cold energy storage device, and are used to receive the temperature signals, material height signals and timing signals of the primary screening material bin, the second material bin and the fourth material bin.

[0011] In one embodiment of the present invention, the primary screening module includes a primary screening device, which is a single-layer heavy-duty circular vibrating screen; the primary screening unit includes a primary screening device, and the secondary screening unit includes a secondary screening device, and both the primary screening device and the secondary screening device 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 vibration screen; the two-stage screening device and the two-stage screening device are both provided with an ultrasonic device.

[0012] In one embodiment of the present invention, the primary crushing unit includes a primary crushing device, which is a jaw crushing device; the secondary crushing unit includes a secondary crushing device, which is a cone crushing device; The low-temperature shaping unit includes a low-temperature shaping device, and the low-temperature shaping device is a vertical shaft impact crusher.

[0013] In one embodiment of the present invention, the refrigeration device includes an evaporator tube and a refrigerant located in the evaporator tube, wherein the outer surface of the evaporator tube contacts the refrigerant for heat exchange; the heating device 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 low-temperature processing cold energy is insufficient, 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.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the RAP pretreatment system provided by the present invention, by setting up an impurity removal device, it is ensured that large impurities in RAP are effectively removed, thereby effectively ensuring the quality of RAP. A multi-stage processing module is used to perform primary preheating crushing and screening, secondary preheating crushing and screening, and low-temperature shaping screening on the material in sequence, thereby achieving refined processing of RAP and greatly reducing the pseudo-coarse particles and particle agglomeration in the material obtained by screening. At the same time, the heat energy and cold energy in the preheating treatment and low-temperature treatment are recycled and utilized through the heat-cold energy dual-circulation recovery module, thereby achieving a green, low-carbon and energy-saving effect, thereby avoiding the loss of heat-cold energy and improving the utilization efficiency of resources.

[0015] 2. The RAP pretreatment method provided by the present invention controls the temperature gradient, performs alternating operations of preheating and drying (high temperature) and low temperature treatment on RAP of different particle sizes, and combines heat and cold energy recovery to reduce the long-term cost of the RAP pretreatment method by optimizing energy consumption. At the same time, compared with heating treatment alone, which easily causes secondary aging of old asphalt in RAP, low temperature treatment alone makes it difficult to remove moisture from RAP, thereby affecting the crushing and screening effect. The alternating operation of high temperature and low temperature will soften RAP and evaporate moisture in the heating stage, embrittle asphalt in the low temperature stage and ensure the integrity of aggregates, reducing the generation of lumps and fine powder. In addition, the alternating operation of high temperature and low temperature will reduce harmful gas and dust pollution, thereby significantly reducing carbon emissions. Therefore, the RAP pretreatment method provided by the present invention not only realizes the refined treatment of RAP, but also improves energy utilization through the recycling of heat-cold energy, and also improves the performance of the RAP obtained by screening through the combination of heat treatment and cold treatment, reducing the impact on the environment.

[0016] 3. The present invention improves the overall stability of the RAP pretreatment system through the linkage of the refrigeration equipment and the heating equipment and the redundant design of the heating equipment.

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of a RAP pretreatment system based on heat-cold energy dual-cycle recovery provided by an embodiment of the present invention; Figure 2 Schematic diagram of a heat-cold energy dual-cycle recovery module provided by an embodiment of the present invention; Figure 3 It is a flow chart of a RAP pretreatment method based on heat-cold energy dual-cycle recovery provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following is a detailed description of a RAP pretreatment method and system based on heat-cold energy dual-cycle recovery proposed in accordance with the present invention, in combination with the accompanying drawings and specific implementation methods.

[0020] The aforementioned and other technical contents, features, and effects of the present invention are clearly presented in the following detailed description of the specific embodiments in conjunction with the accompanying drawings. Through the description of the specific embodiments, a deeper and more specific understanding of the technical means and effects adopted by the present invention to achieve the intended purpose can be obtained. However, the accompanying drawings are provided for reference and illustration purposes only and are not intended to limit the technical solutions of the present invention.

[0021] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0022] The term "comprise" or any other variations is intended to cover a 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.

[0023] The embodiment of the present invention provides a RAP pretreatment system based on heat-cold energy dual cycle recovery, see Figure 1 The system includes a heat-cold energy dual-circulation recovery module and a feed impurity removal module, a primary screening module, a primary processing module, a secondary processing module and a tertiary processing module connected in sequence.

[0024] The feed impurity removal module is used to remove impurities from the waste asphalt recycling material to obtain pre-cleaned material. The primary screening module is used to perform primary screening on the pre-cleaned material to obtain primary screened material. 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 primary screened material; the primary heat recovery unit is used to recover heat from the primary preheating unit; the primary crushing unit is used to crush the preheated primary screened material; the primary screening unit is used to screen the primary screened material after primary crushing to obtain a first material and a 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.

[0025] 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; and 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 particle size of the third material is greater than 0 and less than or equal to 5mm, and the particle size of the fourth material is greater than 5mm and less than or equal to 20mm.

[0026] The tertiary processing module includes a cryogenic treatment unit, a cold energy recovery unit, a cryogenic shaping unit, and a three-stage screening unit. The cryogenic treatment unit is used to perform cryogenic treatment on the fourth material at a temperature of -15 to -20°C (minus 15 degrees Celsius to minus 20 degrees Celsius) for 5 to 8 minutes. The cold energy recovery unit is used to recover the cold energy from the cryogenic treatment unit. The cryogenic shaping unit is used to shape and crush the fourth material after cryogenic treatment at low temperatures. The three-stage screening unit is used to screen the shaped and crushed fourth material to obtain the fifth, sixth, and seventh materials. The particle size of the fifth material is greater than 0 and less than or equal to 5mm, the particle size of the sixth material is greater than 5mm and less than or equal to 10mm, and the particle size of the seventh material is greater than 10mm and less than or equal to 20mm.

[0027] The heat-cold energy dual-cycle recovery module is used to control the primary preheating unit, the primary heat energy recovery unit, the secondary preheating unit, the secondary heat energy recovery unit, the low-temperature treatment unit and the cold energy recovery unit.

[0028] In the RAP pretreatment system provided by the present invention, by providing an impurity removal device, the effective removal of large impurities in the RAP is ensured, thereby effectively ensuring the quality of the RAP. A multi-stage processing module is used to perform primary preheating crushing and screening, secondary preheating crushing and screening, and low-temperature shaping screening on the material, thereby achieving refined processing of the RAP and greatly reducing the pseudo-coarse particles and particle agglomeration in the screened material. At the same time, the heat and cold energy from the preheating and low-temperature treatments are recycled and reused through a heat-cold energy dual-circulation recovery module, thereby improving resource utilization efficiency.

[0029] For example, the primary preheating temperature is 110-130°C for 8-15 minutes; the secondary preheating temperature is 110-130°C for 8-15 minutes; and the low-temperature treatment temperature is -15--20°C for 5-8 minutes. Preheating, drying, and low-temperature treatment reduce the moisture content of the material and prevent asphalt aging.

[0030] Exemplarily, the feed impurity removal module includes a feed device and an impurity removal device. The feed device can be a vibrating feed belt, and the impurity removal device can be a impurity remover. The vibrating feed belt steadily transports the waste asphalt recycled material to the feed end of the impurity remover for impurity removal. The first discharge end of the impurity remover is connected to the primary screening module, and the second discharge end of the impurity remover is connected to the impurity collection bin. The impurity remover removes large impurities such as soil, stone, wood, and iron from the RAP, effectively ensuring the quality of the subsequent fine screening of the RAP.

[0031] In one embodiment of the present invention, see Figure 2 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.

[0032] The heating equipment is connected to both a primary screening material bin storing the primary material and a secondary material bin storing the secondary material via heat transfer pipes. This allows the heat medium heated by the heating equipment to preheat the primary screening material and the secondary material, respectively, through the heat transfer pipes. Both the primary screening material bin and the secondary material bin are connected to a waste heat storage device to recover waste heat from preheating in the primary and secondary material bins.

[0033] The refrigeration equipment is connected to the fourth material bin storing the fourth material through the cold energy transmission pipeline, so that the refrigerant of the refrigeration equipment performs low-temperature treatment on the fourth material through the cold energy transmission pipeline; the fourth material bin is connected to the cold energy storage equipment, so as to recover the cold energy after low-temperature treatment in the fourth material bin.

[0034] The control unit includes multiple controllers, multiple temperature sensors, and multiple temperature and height timing sensors. The temperature sensors are respectively arranged inside the waste heat storage device and the cold energy storage device, and are used to obtain temperature signals from the waste 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, and are used to obtain temperature signals, material height signals, and timing signals from 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 waste heat storage device, and the cold energy storage device, and are used to receive temperature signals from the waste heat storage device and the cold energy storage device, and 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. The controllers can determine whether the received signals meet preset requirements based on the received signals, and then control the opening or closing of the heating equipment, the cooling equipment, the waste heat storage device, and the cold energy storage device.

[0035] In one example, the cooling device includes an evaporator tube and a refrigerant located within the evaporator tube, with the outer surface of the evaporator tube in contact with the refrigerant for heat exchange. The heating device includes an electric heating wire, a heat pump, and a heat exchanger. The electric heating wire and 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. When low-temperature processing cooling energy is insufficient, the linkage controller is configured to receive a linkage signal from the cooling device and transmit the linkage signal to the heating device, thereby enabling the heat exchanger of the heating device to exchange heat with the heat generated by the cooling device.

[0036] That is to say, based on the linkage controller, when the demand for cold energy increases, the heat generated by the refrigeration equipment during operation can be exchanged with the heat exchanger of the heating equipment. On the one hand, the heat exchanger absorbs the heat of the refrigeration equipment, thereby improving the refrigeration efficiency of the refrigeration equipment and increasing the cooling capacity. On the other hand, the heat obtained by the heat exchanger can also be used to heat the heat medium in the heating equipment, improving the utilization rate of heat resources. In this way, through the linkage controller, refrigeration and heating can achieve a linkage and synergistic effect. For example, the initial heat medium entering the heating equipment will first absorb the heat generated by the refrigeration equipment through the heat exchanger to obtain preheated heat medium, which is then further heated to the required preheating temperature through a heat pump or electric heating wire.

[0037] In this example, the heating equipment includes an electric heating wire and a heat pump. Both the electric heating wire and the heat pump can be used to heat the heat medium. Generally, the heat pump is used to heat the heat medium, as it is highly efficient and energy-efficient. When heat demand increases, the electric heating wire and the heat pump can be used simultaneously to heat the heat medium to meet preheating requirements. In this way, the overall stability of the RAP pretreatment system is improved through the linkage between the cooling and heating equipment and the redundant design of the heating equipment.

[0038] In one example, the primary screening module includes a primary screening device, which is a single-layer heavy-duty circular vibrating screen; the primary screening unit includes a primary screening device, and the secondary screening unit includes a secondary screening device, both of which are double-layer high-frequency vibrating screens. The tertiary screening unit includes a third-stage screening device, which is a three-layer variable-frequency vibrating screen. Both the secondary and third-stage screening devices are equipped with an ultrasonic device that can be used to clean sieves with mesh sizes of 0 to 5 mm to prevent clogging.

[0039] In one example, a single-layer heavy-duty circular vibrating screen is set with a sieve hole size of 40 mm; a double-layer high-frequency vibrating screen used for primary screening is set with sieve hole sizes of 20 mm and 40 mm from bottom to top; a double-layer high-frequency vibrating screen used for secondary screening is set with sieve hole sizes of 5 mm and 20 mm from bottom to top; a three-layer variable frequency vibrating screen used for tertiary screening is set with sieve 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.

[0040] For example, the single-layer heavy-duty circular vibrating screen, double-layer high-frequency vibrating screen, and triple-layer high-frequency vibrating screen are all equipped with an inclination angle. That is, each vibrating screen has a certain angle with the horizontal plane to prevent material from sticking. Furthermore, the single-layer heavy-duty circular vibrating screen, double-layer high-frequency vibrating screen, and triple-layer high-frequency vibrating screen are all sprayed with a polyurethane anti-stick coating.

[0041] In one example, the primary crushing unit includes a primary crushing device, which is a jaw crusher. The jaw crusher is used to coarsely crush preheated and dried primary screened materials with a diameter of 0-40 mm. The movable jaw plate has a wavy tooth profile to reduce asphalt film adhesion.

[0042] In one example, the secondary crushing unit includes a secondary crushing device, which is a cone crushing device. The cone crushing device is used to crush the preheated and dried second material with a particle size of 20-40 mm, and the laminated crushing makes the output particle size more uniform.

[0043] In one example, the low-temperature shaping unit includes a low-temperature shaping device, which is a vertical shaft impact crusher. This crusher uses a rock-on-rock pattern to crush the material by impacting it with an anvil. This crusher ejects the material through a high-speed rotating rotor, using collisions between materials to strip away the aged asphalt film, thereby optimizing the particle surface roughness and shape and reducing over-crushing. Furthermore, the rotor linear speed can be dynamically adjusted based on the aging of the RAP asphalt, typically set to 45-60 m / s. Furthermore, the liner adopts a grooved design to enhance the grinding effect on the material.

[0044] The present invention also provides a RAP pretreatment method based on heat-cold energy dual cycle recovery, see Figure 3 , including the following steps: S1. Obtaining recycled asphalt and removing impurities to obtain pre-removed material. This step may specifically include transferring the RAP obtained by milling to the feed end of a de-impurifier through a feeding device, removing impurities such as soil, stone, wood, and iron contained in the RAP, and transferring the collected impurities to an impurity collection bin for storage.

[0045] S2. Perform a preliminary screening on the pre-cleaned material to obtain the preliminary screened material with a particle size of R0 and store it in a preliminary screened material bin, 0<R0≤40mm.

[0046] S3. The pre-screened material is subjected to a first-stage preheating, a first-stage crushing and a first-stage screening in sequence to obtain a first material with a particle size of R11 and a second material with a particle size of R12, 0<R11≤20mm, 20mm<R12≤40mm; the first material is stored in a first material bin, and the second material is stored in a second material bin.

[0047] Among them, after the first-level preheating is completed, the first-level heat energy recovery is also included.

[0048] S4. The second material is subjected to secondary preheating and secondary crushing in sequence, and then mixed with the first material and 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 a third material bin, and the fourth material is stored in a fourth material bin.

[0049] Among them, after the secondary preheating is completed, it also includes secondary heat energy recovery.

[0050] S5. The fourth material is subjected to low-temperature treatment, low-temperature shaping and three-stage screening. The low-temperature treatment is performed 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.

[0051] In this step, the fourth material is treated at low temperature to a preset temperature, and then treated at low temperature for a preset time. The treated fourth material is directly subjected to a shaping operation at low temperature; the shaping operation includes crushing the material, adjusting the size and shape, etc.

[0052] A fifth material having a particle size of R31, a sixth material having a particle size of R32, and a seventh material having a particle size of R33 are obtained, with 0 < R31 ≤ 5 mm, 5 < R32 ≤ 10 mm, and 10 < R33 ≤ 20 mm. The third material is mixed with the fifth material to obtain RAP pre-treated materials with three different particle size ranges. In other words, three batches of finely screened materials are obtained: the first batch has a particle size greater than 0 and less than or equal to 5 mm, the second batch has a particle size greater than 5 mm and less than or equal to 10 mm, and the third batch has a particle size greater than 10 mm and less than or equal to 20 mm.

[0053] The RAP pretreatment method provided by the present invention controls the temperature gradient, performs alternating operations of preheating and drying (high temperature) and low temperature treatment on RAP materials of different particle sizes, and combines heat and cold energy recovery to reduce the long-term cost of the RAP pretreatment method by optimizing energy consumption. At the same time, compared with heating treatment alone, which easily causes secondary aging of old asphalt in RAP, low temperature treatment alone makes it difficult to remove moisture from RAP, thereby affecting the crushing and screening effect. The alternating operation of high temperature and low temperature will soften RAP and evaporate moisture in the heating stage, embrittle asphalt in the low temperature stage and ensure the integrity of aggregates, reducing the generation of lumps and fine powder. In addition, the alternating operation of high temperature and low temperature will reduce harmful gas and dust pollution, thereby significantly reducing carbon emissions. In this way, the RAP pretreatment method provided by the present invention not only realizes the refined treatment of RAP, but also improves energy utilization through the recycling of heat-cold energy, and also improves the performance of the RAP obtained by screening through the combination of heat treatment and cold treatment, reducing the impact on the environment.

[0054] Exemplarily, the primary preheating temperature is 110-130°C, and the secondary preheating temperature is 110-130°C.

[0055] Exemplarily, the heat medium is thermal oil or water, and the coolant is ethylene glycol solution.

[0056] In one embodiment of the present invention, in step S3, the primary preheating and primary heat energy recovery include: using a heat-cold energy dual-cycle recovery module to regulate the primary preheating and the primary heat energy recovery; 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 control unit includes multiple controllers, multiple temperature sensors, and multiple temperature and altitude timing sensors; 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; the temperature and height timing sensors are respectively arranged in the primary screening material bin, the second material bin and the fourth material bin; The heat-cold energy dual-cycle recovery module is used to regulate the primary preheating and primary heat energy recovery, including: S31. The controller of the primary screening material bin receives a material height signal from a temperature and height timing sensor in the primary screening material bin. When the material height meets the preset requirement, the controller of the primary screening material bin controls the heating equipment to preheat the primary screening material. S32, according to the temperature signal and time signal sent by the temperature height timing sensor in the primary screening material bin, after completing the 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-level preheating; S33, after the first-stage preheating stops, the heat medium used for the first-stage preheating is recovered to the waste heat storage device; S34. The controller of the primary screening material bin continues to receive the material height signal emitted by the temperature height timing sensor in the primary screening material bin. When the material height meets the preset requirements again, the controller of the waste heat storage device receives the temperature signal emitted by the temperature sensor. If the heat medium in the waste heat storage device meets the first-level 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-level 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. Repeat steps S32 to S34 until the material processing is completed.

[0057] In one embodiment of the present invention, in step S4, the secondary preheating and secondary heat energy recovery include: using a heat-cold energy dual-cycle recovery module to regulate the secondary preheating and secondary heat energy recovery, and the regulation is specifically as follows: S41, the controller of the second material bin receives a material height signal from a temperature and height timing sensor in the second material bin. When the material height meets a preset requirement, the controller of the second material bin controls the heating device to preheat the second material. S42, according to the temperature signal and time signal sent by the temperature height timing sensor in the second material bin, after the preheating is completed at the preset temperature for the preset time, the controller of the second material bin controls the heating device to stop the secondary preheating; S43, after the secondary preheating stops, the heat medium used for the secondary preheating is recovered to the waste heat storage device; S44. The controller of the second material bin continues to receive the material height signal emitted by the temperature height timing sensor in the second material bin. When the material height meets the preset requirements again, the controller of the waste heat storage device receives the temperature signal emitted by 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 preheating 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 the second material. Repeat steps S42 to S44 until the material processing is completed.

[0058] In one embodiment of the present invention, in step S5, the low-temperature treatment and cold energy recovery include: using a heat-cold energy dual-cycle recovery module to regulate the low-temperature treatment and cold energy recovery, and the regulation is specifically: S51, the controller of the fourth material bin receives a material height signal sent by a temperature and height timing sensor in the fourth material bin. When the material height meets a preset requirement, the controller of the fourth material bin controls the refrigeration equipment to perform low-temperature treatment on the fourth material. S52: After completing the low-temperature treatment at a preset temperature for a preset time, the controller of the fourth material bin controls the refrigeration equipment to stop the low-temperature treatment according to the temperature signal and time signal sent by the temperature height timing sensor in the fourth material bin; S53, after the low-temperature treatment is stopped, the refrigerant used for the low-temperature treatment is recovered to the cold energy storage device; S54, the controller of the fourth material bin continues to receive the material height signal emitted by the temperature height timing sensor in the fourth material bin. When the material height meets the preset requirements again, the temperature signal emitted by the temperature sensor is received by the controller of the cold energy storage device. 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 device for cooling and then used for the low-temperature treatment of the fourth material. Repeat steps S52 to S54 until the material processing is completed.

[0059] The present invention adopts RAP refined pretreatment process and heat-cold energy dual-circulation recovery technology, which can effectively reduce the agglomeration of RAP and ensure high-quality grading treatment of RAP. At the same time, it can effectively and repeatedly recycle waste heat and cold air, thereby achieving energy-saving effects, thereby avoiding energy dissipation in the air in nature, causing unnecessary energy waste, and saving costs for RAP pretreatment.

[0060] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A RAP pretreatment method based on heat-cold energy dual cycle recovery, characterized in that: The following steps are involved: S1. Obtaining waste asphalt recycling material and removing impurities to obtain pre-removed impurity material; S2. Preliminary screening is performed on the pre-cleaned material to obtain the pre-screened material with a particle size of R0 and store it in the pre-screened material bin, 0<R0≤40mm; S3, sequentially performing primary preheating, primary crushing, and primary screening on the pre-screened material 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 a first material bin, and the second material is stored in a second material bin; Wherein, after the first stage preheating is completed, the first stage heat energy recovery is also included; S4, performing secondary preheating and secondary crushing on the second material, mixing it with the first material and performing 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 a third material bin, and the fourth material is stored in a fourth material bin; Wherein, after the secondary preheating is completed, the secondary heat energy recovery is also included; S5, performing low-temperature treatment, low-temperature shaping and three-stage screening on the fourth material, wherein the low-temperature treatment is performed at a temperature of -15 to -20°C for 5 to 8 minutes; wherein the low-temperature treatment also includes cold energy recovery; 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 are obtained, 0<R31≤5mm, 5<R32≤10mm, 10<R33≤20mm; the third material is mixed with the fifth material to obtain three RAP pretreated materials with different particle size ranges.

2. The RAP pretreatment method based on heat-cold energy dual cycle recovery according to claim 1, characterized in that: In step S3, the primary preheating and the primary heat energy recovery include: using a heat-cold energy dual-cycle recovery module to regulate the primary preheating and the primary heat energy recovery; 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 control unit includes multiple controllers, multiple temperature sensors, and multiple temperature and altitude timing sensors; 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; the temperature and height timing sensors are respectively arranged in the primary screening material bin, the second material bin and the fourth material bin; The use of the heat-cold energy dual-cycle recovery module to regulate the primary preheating and primary heat energy recovery includes: S31. The controller of the primary screening material bin receives a material height signal from a temperature and height timing sensor in the primary screening material bin. When the material height meets the preset requirement, the controller of the primary screening material bin controls the heating equipment to preheat the primary screening material. S32, according to the temperature signal and time signal sent by the temperature height timing sensor in the primary screening material bin, after completing the 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-level preheating; S33, after the first-stage preheating stops, the heat medium used for the first-stage preheating is recovered to the waste heat storage device; S34. The controller of the primary screening material bin continues to receive the material height signal emitted by the temperature height timing sensor in the primary screening material bin. When the material height meets the preset requirements again, the controller of the waste heat storage device receives the temperature signal emitted by the temperature sensor. If the heat medium in the waste heat storage device meets the first-level 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-level 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. Repeat steps S32 to S34 until the material processing is completed.

3. The RAP pretreatment method based on heat-cold energy dual cycle recovery according to claim 2, characterized in that: In step S4, the secondary preheating and the secondary heat energy recovery include: using a heat-cold energy dual cycle recovery module to regulate the secondary preheating and the secondary heat energy recovery; The use of the heat-cold energy dual-cycle recovery module to regulate the secondary preheating and secondary heat energy recovery includes: S41, the controller of the second material bin receives a material height signal from a temperature and height timing sensor in the second material bin. When the material height meets a preset requirement, the controller of the second material bin controls the heating device to preheat the second material. S42, according to the temperature signal and time signal sent by the temperature height timing sensor in the second material bin, after the preheating is completed at the preset temperature for the preset time, the controller of the second material bin controls the heating device to stop the secondary preheating; S43, after the secondary preheating stops, the heat medium used for the secondary preheating is recovered to the waste heat storage device; S44. The controller of the second material bin continues to receive the material height signal emitted by the temperature height timing sensor in the second material bin. When the material height meets the preset requirements again, the controller of the waste heat storage device receives the temperature signal emitted by 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 preheating 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 the second material. Repeat steps S42 to S44 until the material processing is completed.

4. The RAP pretreatment method based on heat-cold energy dual cycle recovery according to claim 2, 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 the cold energy recovery; The heat-cold energy dual cycle recovery module is used to regulate low temperature treatment and cold energy recovery, including: S51, the controller of the fourth material bin receives a material height signal sent by a temperature and height timing sensor in the fourth material bin. When the material height meets a preset requirement, the controller of the fourth material bin controls the refrigeration equipment to perform low-temperature treatment on the fourth material. S52: After completing the low-temperature treatment at a preset temperature for a preset time, the controller of the fourth material bin controls the refrigeration equipment to stop the low-temperature treatment according to the temperature signal and time signal sent by the temperature height timing sensor in the fourth material bin; S53, after the low-temperature treatment is stopped, the refrigerant used for the low-temperature treatment is recovered to the cold energy storage device; S54, the controller of the fourth material bin continues to receive the material height signal emitted by the temperature height timing sensor in the fourth material bin. When the material height meets the preset requirements again, the temperature signal emitted by the temperature sensor is received by the controller of the cold energy storage device. 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 device for cooling and then used for the low-temperature treatment of the fourth material. Repeat steps S52 to S54 until the material processing is completed.

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

6. A RAP pretreatment system based on heat-cold energy dual cycle recovery, characterized in that: It includes a heat-cold energy dual-circulation recovery module and a feed impurity removal module, a primary screening module, a primary processing module, a secondary processing module and a tertiary processing module connected in sequence; The feed impurity removal module is used to remove impurities from the waste asphalt recycling material to obtain pre-impurity-removed material; The primary screening module is used to perform primary screening on the pre-cleaned material to obtain the primary screened material; 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 primary screened material; the primary heat recovery unit is used to recover the waste heat of the primary preheating unit; the primary crushing unit is used to crush the preheated primary screened material; the primary screening unit is used to screen the primary screened material after the primary crushing to obtain a first material and a 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; 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 of 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; 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; The three-stage processing module includes a low-temperature processing unit, a cold energy recovery unit, a low-temperature shaping unit and a three-stage screening unit; the low-temperature processing unit is used to perform low-temperature processing on the fourth material, and the low-temperature processing is performed at a temperature of -15 to -20°C for 5 to 8 minutes; the cold energy recovery unit is used to recover the cold energy of the low-temperature processing unit; the low-temperature shaping unit is used to shape and crush the fourth material after low-temperature processing under low-temperature conditions; the three-stage screening unit is used to screen the fourth material after shaping and crushing to obtain a fifth material, a sixth material and a 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; The heat-cold energy dual-cycle recovery module is used to regulate the primary preheating unit, the primary heat energy recovery unit, the secondary preheating unit, the secondary heat energy recovery unit, the low-temperature treatment unit and the cold energy recovery unit.

7. The RAP pretreatment system based on heat-cold energy dual cycle recovery according to claim 6 is 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 device is connected to 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 respectively through the heat transfer pipeline; the primary screening material bin and the second material bin are both connected to the waste heat storage device, 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 a fourth material bin storing a fourth material through a cold transmission pipeline, so that the refrigerant of the refrigeration equipment performs low-temperature treatment on the fourth material through the cold transmission pipeline; the fourth material bin is connected to a cold energy storage device, so as to recover cold energy after low-temperature treatment in the fourth material bin; The control unit includes a plurality of controllers, a plurality of temperature sensors and a plurality of temperature-altitude timing sensors; The temperature sensors are respectively arranged inside the waste heat storage device and the cold energy storage device, and are used to obtain the temperature signals of the waste heat storage device and the cold energy storage device; the temperature height timing sensors are respectively arranged in the primary screening material bin, the second material bin and the fourth material bin, and are used to obtain the 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 waste heat storage device and the cold energy storage device, and are used to receive the temperature signals of the waste heat storage device and the cold energy storage device, and are used to receive the temperature signals, material height signals and timing signals of the primary screening material bin, the second material bin and the fourth material bin.

8. The RAP pretreatment system based on heat-cold energy dual cycle recovery according to claim 6 or 7, characterized in that: The primary screening module includes a primary screening device, which is a single-layer heavy-duty circular vibrating screen; the primary screening unit includes a primary screening device, and the secondary screening unit includes a secondary screening device, and both the primary screening device and the secondary screening device 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 vibration screen; the two-stage screening device and the two-stage screening device are both provided with an ultrasonic device.

9. The RAP pretreatment system based on heat-cold energy dual cycle recovery according to claim 6 or 7, characterized in that: The primary crushing unit includes a primary crushing device, which is a jaw crushing device; the secondary crushing unit includes a secondary crushing device, which is a cone crushing device; The low-temperature shaping unit includes a low-temperature shaping device, and the low-temperature shaping device is a vertical shaft impact crusher.

10. The RAP pretreatment system based on heat-cold energy dual cycle recovery according to claim 7, characterized in that: The refrigeration device includes an evaporator tube and a refrigerant located in the evaporator tube, wherein the outer surface of the evaporator tube contacts the refrigerant for heat exchange; the heating device 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 low-temperature processing cooling capacity is insufficient, 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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