Asphalt mixing station and asphalt mixing station control method

Abstract

The present invention relates to the technical field of asphalt preparation, and in particular, to an asphalt mixing station and an asphalt mixing station control method. The asphalt mixing station includes a regeneration building, a primary building, and a waste heat recovery system; the waste heat recovery system includes a first heat exchange component and a heat dissipation and exhaust component, and the heat dissipation and exhaust component is connected to the first heat exchange component; the first heat exchange component is arranged at the air inlet of the regeneration induced draft fan of the regeneration building, and is used to absorb the waste heat in the tail gas introduced into the regeneration induced draft fan; the first heat exchange component includes a plurality of heat exchange units, and the plurality of heat exchange units are arranged in sequence along the extension direction of the induced draft duct of the regeneration induced draft fan; the heat dissipation and exhaust component is arranged in the cold material bin of the primary building, and is used to blow the waste heat absorbed by the first heat exchange component toward the cold material bin. The asphalt mixing station is used to complete the asphalt mixing work, and it can use the high temperature gas of the recycled asphalt fume to heat the primary stone, thereby reducing the natural gas consumption of the primary burner.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt preparation, and in particular to an asphalt mixing station and an asphalt mixing station control method. Background Art

[0002] At present, during the preparation process of asphalt, the heat generated by the exhaust pipes of the mixing station usually reaches 200°C. In the past production process, this part of the heat was dissipated into the air and was not effectively utilized, resulting in high natural gas consumption. Summary of the invention

[0003] The objects of the present invention include, for example, providing an asphalt mixing station and an asphalt mixing station control method, which can utilize the high temperature gas of the regenerated asphalt flue gas to heat the original stone in the cold material bin, thereby reducing the natural gas consumption of the original burner.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, the present invention provides an asphalt mixing station, the asphalt mixing station comprising a regeneration building, a primary building and a waste heat recovery system;

[0006] The waste heat recovery system includes a first heat exchange component and a heat dissipation and exhaust component, and the heat dissipation and exhaust component is connected to the first heat exchange component;

[0007] The first heat exchange component is arranged at the air inlet of the regeneration induced draft fan of the regeneration building, and is used to absorb the waste heat in the tail gas introduced into the regeneration induced draft fan; the first heat exchange component includes a plurality of heat exchange units, and the plurality of heat exchange units are arranged in sequence and at intervals along the extension direction of the induced draft duct of the regeneration induced draft fan;

[0008] The heat dissipation and exhaust assembly is arranged in the cold material bin of the raw material building, and is used to blow the residual heat absorbed by the first heat exchange assembly toward the cold material bin.

[0009] In an optional embodiment, the asphalt mixing station further comprises a second heat exchange component, which is arranged at the air inlet of the primary induced draft fan of the primary building and is used to absorb the waste heat of the tail gas introduced into the primary induced draft fan;

[0010] The heat dissipation and exhaust assembly is used to blow the residual heat absorbed by at least one of the first heat exchange assembly and the second heat exchange assembly toward the cold material bin.

[0011] In an optional embodiment, the asphalt mixing station further comprises a third heat exchange component, which is arranged at the exhaust port of the regeneration induced draft fan and is used to absorb the waste heat of the tail gas discharged by the regeneration induced draft fan;

[0012] The heat dissipation and exhaust assembly is used to blow the residual heat absorbed by at least one of the first heat exchange assembly, the second heat exchange assembly and the third heat exchange assembly toward the cold material bin.

[0013] In an optional embodiment, the asphalt mixing station further includes a fourth heat exchange component, which is disposed at the exhaust port of the primary induced draft fan and is used to absorb the waste heat of the tail gas exhausted by the primary induced draft fan;

[0014] The heat dissipation and exhaust assembly is used to blow the residual heat absorbed by at least one of the first heat exchange assembly, the second heat exchange assembly, the third heat exchange assembly and the fourth heat exchange assembly toward the cold material bin.

[0015] In an optional embodiment, the waste heat recovery system further includes a first temperature detection unit, a second temperature detection unit, a third temperature detection unit, a fourth temperature detection unit, and a fifth temperature detection unit;

[0016] The first temperature detection unit is configured at the air inlet of the regeneration induced draft fan, the second temperature detection unit is configured in the cold material bin, the third temperature detection unit is configured at the air inlet of the primary induced draft fan, the fourth temperature detection unit is configured at the exhaust port of the regeneration induced draft fan, and the fifth temperature detection unit is configured at the exhaust port of the primary induced draft fan.

[0017] In a second aspect, the present invention provides an asphalt mixing station control method, which is implemented by using an asphalt mixing station as in any one of the aforementioned embodiments, receiving a first temperature signal representing the temperature at the air inlet of a regeneration induced draft fan, receiving a second temperature signal representing the temperature of a cold material bin, receiving a third temperature signal representing the temperature at the air inlet of a primary induced draft fan, receiving a fourth temperature signal representing the temperature at the air outlet of the regeneration induced draft fan, and receiving a fifth temperature signal representing the temperature at the air outlet of the primary induced draft fan;

[0018] Confirm whether the temperature at the air inlet of the regeneration induced draft fan, the temperature at the air inlet of the primary induced draft fan, the temperature at the air outlet of the regeneration induced draft fan, and the temperature at the air outlet of the primary induced draft fan are greater than a first preset temperature;

[0019] When one or more of the temperature at the air inlet of the regeneration induced draft fan, the temperature at the air inlet of the primary induced draft fan, the temperature at the air outlet of the regeneration induced draft fan, and the temperature at the air outlet of the primary induced draft fan is greater than a first preset temperature, controlling the corresponding heat exchange component to operate;

[0020] When multiple of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component are in working condition, if the temperature of the cold material bin is greater than the second preset temperature, one of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component in operation is controlled to stop operating.

[0021] The beneficial effects of the embodiments of the present invention include:

[0022] The asphalt mixing station is used to complete the asphalt mixing work. While completing the related asphalt mixing work, it can collect the waste heat in the exhaust gas of the regeneration fan of the regeneration building through the waste heat recovery system, and blow the waste heat absorbed by the first heat exchange component toward the cold material bin through the heat dissipation and exhaust component, thereby realizing the preliminary heating of the stone in the cold material bin and achieving the function of preliminary partial dehydration. In this way, the high-temperature gas of the recycled asphalt flue gas is used to heat the original stone, thereby reducing the natural gas consumption of the original burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a structural schematic diagram of an asphalt mixing station in an embodiment of the present invention.

[0025] Icons: 100-asphalt mixing station; 110-regeneration building; 120-original building; 130-waste heat recovery system; 140-flue gas recovery system; 111-regeneration induced draft fan; 121-cold material silo. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0031] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0032] Asphalt mixing plant is a kind of equipment used to produce asphalt mixture, which has multiple structures and complex work processes. The work process of asphalt mixing plant includes: aggregate pre-measurement batching: pre-measurement batching is achieved through computer-controlled stepless speed regulation discharging belt conveyor; aggregate transportation: aggregate is sent to the drying drum through belt conveyor; aggregate drying: heating in the drying drum, infrared thermometer detects temperature and adjusts burner; dust removal: dust generated during drying is sucked and processed by dust removal equipment; hot aggregate transportation and screening: hot aggregate is lifted to the screening machine for screening; intermediate hot material bin storage: screened aggregate is stored in the hot material bin according to specifications; powder and asphalt weighing: powder and asphalt are weighed according to formula requirements; mixing: weighed aggregate, powder and asphalt are sent to the mixer for mixing; finished product unloading: the stirred asphalt mixture is unloaded to the finished product lifting trolley or directly unloaded to the truck; control system monitoring: real-time monitoring of key parameters in the production process to ensure product quality;

[0033] The design and operation of an asphalt mixing plant requires consideration of a variety of factors, such as the type of raw materials, the required mix quality and output, etc. The entire production process is highly automated and precisely controlled to ensure the production of high-quality asphalt mixture.

[0034] It should be noted that the recycling building 110 and the original building 120 in the asphalt preparation equipment are two different asphalt mixture production equipment, which play an important role in the asphalt preparation process.

[0035] Among them, the recycling building 110 is a device specially used for asphalt recycling. It can recycle old asphalt pavement materials and regenerate them into new asphalt mixtures through specific process flows. Before production, the recycling building 110 can test the asphalt content, aging degree and other parameters of the original pavement recycled materials, select appropriate regeneration agents or design recycling processes, and the recycled mixture can be transported back to the original pavement for paving, or transported to other construction sites for paving, making full use of all recycled materials; and the waste gas generated during the heating process of the recycled materials can be treated by secondary combustion through the matching original machine burner, drying drum and dust collector to reduce pollution.

[0036] The original building 120 is a device used to produce brand new asphalt mixtures. It does not involve recycling old materials, but directly uses new asphalt materials and aggregates for mixing. The drying drum of the original building 120 is used to heat and dry new aggregates; the combustion furnace provides heat energy for heating asphalt and aggregates; the horizontal shaft forced mixer is used to mix new asphalt materials and aggregates to form a uniform asphalt mixture.

[0037] Recycling Building 110 and Primary Building 120 may be similar in structure, but their work focus and process flow are different. Recycling Building 110 needs to be able to handle old asphalt mixture, including crushing, screening, heating and adding regeneration agent, etc. Primary Building 120 focuses more on drying new aggregates and heating and mixing asphalt.

[0038] In terms of working methods, the recycling building 110 will first process the old asphalt pavement materials, then design the mix ratio according to the pavement quality requirements, add new asphalt materials and aggregates, and remix them into a new mixture. The original building 120 directly mixes the new aggregates and asphalt in a certain proportion to form a new asphalt mixture. Through this division of labor, the asphalt preparation equipment can produce asphalt mixtures more efficiently, while achieving resource recycling and environmental protection.

[0039] Please refer to Figure 1 , this embodiment provides an asphalt mixing station 100, the asphalt mixing station 100 includes a regeneration building 110, a primary building 120 and a waste heat recovery system 130;

[0040] The waste heat recovery system 130 includes a first heat exchange component and a heat dissipation and exhaust component, and the heat dissipation and exhaust component is connected to the first heat exchange component;

[0041] The first heat exchange component is arranged at the air inlet of the regeneration induced draft fan 111 of the regeneration building 110, and is used to absorb the waste heat in the tail gas introduced into the regeneration induced draft fan 111; the first heat exchange component includes a plurality of heat exchange units, and the plurality of heat exchange units are sequentially arranged at intervals along the extension direction of the induced draft duct of the regeneration induced draft fan 111;

[0042] The heat dissipation and exhaust assembly is disposed in the cold material bin 121 of the raw building 120 , and is used to blow the residual heat absorbed by the first heat exchange assembly toward the cold material bin 121 .

[0043] It should be noted that, in this embodiment, the regeneration induced draft fan 111 in the regeneration building 110 is an important component of the asphalt regeneration equipment, and its main functions are as follows: Smoke extraction: During the asphalt regeneration process, the old asphalt material will produce dusty smoke during the heating process; the regeneration induced draft fan 111 is responsible for extracting the smoke from the regeneration building 110; Purification treatment: The extracted smoke usually contains dust and other pollutants. The regeneration induced draft fan 111 transports the smoke to the dust removal system, such as a bag filter, for filtration and purification;

[0044] The cold aggregate bin 121 in the raw building 120 is an important component of the asphalt mixing plant 100, and is used to store and supply aggregate that has not been heated, namely, cold aggregate. The following are the main functions and features of the cold material bin 121: Aggregate storage: The cold material bin 121 is used to store aggregates of different specifications, such as crushed stone, sand, etc. These aggregates are usually at room temperature before entering the mixing station; Separate storage: In order to meet the formulation requirements of different asphalt mixtures, the cold material bin 121 is usually divided into multiple compartments for storing different types of aggregates; Transportation preparation: The cold material bin 121 facilitates the transportation and metering of aggregates. After the aggregates are taken out of the cold material bin 121, they will be transported to the drying system for heating and drying; Dust-proof design: In order to prevent the generation and spread of dust, the cold material bin 121 may be equipped with a dust cover or sealing design; Easy maintenance: The design of the cold material bin 121 usually takes into account easy cleaning and maintenance to keep the aggregates clean and the equipment running normally; The cold material bin 121 is an indispensable component of the asphalt mixing plant 100. It ensures the storage and supply of aggregates before entering the drying and mixing process, and plays a key role in the continuity and quality control of the entire asphalt mixture production process.

[0045] Based on the above, the working principle of the asphalt mixing station 100 is:

[0046] Firstly, the asphalt mixing station 100 is used to complete the asphalt mixing work. While completing the relevant asphalt mixing work, it can collect the waste heat in the exhaust gas of the regeneration induced draft fan 111 of the regeneration building 110 through the waste heat recovery system 130, and blow the waste heat absorbed by the first heat exchange component toward the cold material bin 121 through the heat dissipation and exhaust component, thereby realizing the preliminary heating of the stone in the cold material bin 121 and achieving the function of preliminary partial dehydration. In this way, the high-temperature gas of the regenerated asphalt flue gas is used to heat the original stone, thereby reducing the natural gas consumption of the original burner. Moreover, such a structural setting can be upgraded and transformed based on the existing asphalt mixing station 100.

[0047] Based on the above structural setting, in this embodiment, the asphalt mixing station 100 can also include a second heat exchange component, which is arranged at the air inlet of the primary induced draft fan of the primary building 120, and is used to absorb the waste heat of the exhaust gas introduced into the primary induced draft fan; wherein, the heat dissipation and exhaust component is used to blow the waste heat absorbed by at least one of the first heat exchange component and the second heat exchange component toward the cold material bin 121, that is, a heat exchanger is installed at the air outlet of the primary dust collector, that is, the air inlet duct of the primary induced draft fan, to fully absorb the waste heat of the exhaust gas.

[0048] In addition, the asphalt mixing station 100 also includes a third heat exchange component, which is arranged at the exhaust port of the regeneration induced draft fan 111 and is used to absorb the residual heat of the exhaust gas discharged by the regeneration induced draft fan 111; the heat dissipation and exhaust component is used to blow the residual heat absorbed by at least one of the first heat exchange component, the second heat exchange component and the third heat exchange component toward the cold material bin 121.

[0049] In addition, the asphalt mixing station 100 further includes a fourth heat exchange component, which is disposed at the exhaust port of the primary induced draft fan and is used to absorb the waste heat of the exhaust gas discharged by the primary induced draft fan; the heat dissipation and exhaust component is used to blow the waste heat absorbed by at least one of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component toward the cold material bin 121. That is, a heat exchanger is added to the main exhaust pipe (the outlet of the primary induced draft fan) to absorb the heat of the exhaust gas and lead it to the cold material bin 121. By installing a radiator on the cold material bin 121, the stone in the cold material bin 121 is preheated and dehydrated.

[0050] Through the above structure, the waste heat of the regenerated tail gas and the original tail gas can be reused, and the hot air and heat of the high-speed fan and the heat exchange can fully evaporate the water of the stone at the unloading end of the cold material bin 121. In this way, the water content of the original stone and the regenerated stone can be reduced. According to research, every 1% reduction in the water content of the stone and the old material can save 10% of the drying drum heating energy consumption.

[0051] It should be noted that in the above content, the operating states of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component can be controlled according to the use requirements, the working conditions of the regeneration building 110 and the original building 120, especially the inlet and outlet temperatures of the induced draft fans, so as to preheat and dehydrate the stones in the cold material bin 121. In addition, in the process of introducing heat into the cold material bin 121, the operating states of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component can also be controlled to control and adjust the heat introduced into the cold material bin 121, which is conducive to correspondingly controlling the temperature in the cold material bin 121, thereby improving the efficiency of preheating and dehydration treatment, and helping to improve the heat recovery rate.

[0052] Based on the above content, it can be known that the stones in the cold material bin 121 are heated based on the recovered heat, and during the heating process, the operating states of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component are controlled to improve the heat recovery rate. Therefore, the waste heat recovery system 130 also includes a first temperature detection unit, a second temperature detection unit, a third temperature detection unit, a fourth temperature detection unit and a fifth temperature detection unit;

[0053] The first temperature detection unit is configured at the air inlet of the regeneration induced draft fan 111, the second temperature detection unit is configured in the cold material bin 121, the third temperature detection unit is configured at the air inlet of the primary induced draft fan, the fourth temperature detection unit is configured at the exhaust port of the regeneration induced draft fan 111, and the fifth temperature detection unit is configured at the exhaust port of the primary induced draft fan.

[0054] Further, based on the above content, in this embodiment, the asphalt mixing station 100 also includes a smoke recovery system 140, and the smoke recovery system 140 is used to introduce the smoke in the regeneration storage barrel in the regeneration building 110 into the original drying cylinder of the original building 120.

[0055] With such an arrangement, the flue gas in the regenerated storage barrel can be subjected to secondary combustion, that is, the flue gas can be guided to the original drying drum for secondary combustion through the regeneration induced draft fan 111, thereby further reducing pollutant emissions and improving energy efficiency; and by effectively extracting and treating the flue gas, the regeneration induced draft fan 111 helps to reduce the impact of the asphalt regeneration process on the surrounding environment, meeting environmental protection requirements; and inside the regeneration building 110, the induced draft fan can maintain a certain negative pressure state to prevent smoke and dust from escaping to the external environment, thereby ensuring the health and safety of operators; it is conducive to the recovery and utilization of heat energy in the flue gas, thereby improving the energy efficiency of the entire system; and ensuring production continuity: the regeneration induced draft fan 111 ensures the effective treatment and discharge of the flue gas, thereby ensuring the continuity and stability of the asphalt regeneration process.

[0056] It should be noted that the regeneration storage barrel in the regeneration building 110 is an equipment component for storing and temporarily storing the asphalt mixture after the regeneration treatment. The regeneration storage barrel is used to store the regenerated asphalt mixture after heating, screening and adding regeneration agent for subsequent mixing and use; since the asphalt mixture needs to maintain its working performance at a certain temperature, the regeneration storage barrel usually has good thermal insulation performance to reduce heat loss; according to different production needs, the regeneration storage barrel can have different capacities to adapt to production of different scales; the regeneration storage barrel is usually equipped with a convenient conveying system, such as pneumatic conveying or screw conveying, which can convey the asphalt mixture in the storage barrel to the mixer or other use points; in some systems, the regeneration storage barrel can be used in conjunction with a weighing system to ensure accurate measurement of the asphalt mixture; the design of the regeneration storage barrel usually takes into account the convenience of operation, including easy opening, closing and cleaning; the design will take into account the reduction of dust and odor emission to reduce the impact on the environment; since the asphalt mixture may cause wear and tear on the equipment during storage and transportation, the regeneration storage barrel needs to have a certain durability and corrosion resistance. The recycled storage barrel is an indispensable part of the asphalt recycling process. It ensures that the recycled asphalt mixture can be stored and used under suitable conditions, thereby ensuring the continuity of the asphalt recycling process and the quality of the asphalt mixture.

[0057] Based on the above structural arrangement, the regenerated material storage barrel can facilitate the expansion and diffusion of the flue gas and water vapor generated by the heating of the regenerated material, and an induced draft duct is installed above the regenerated storage barrel, and the regenerated flue gas and water vapor are introduced into the primary drying cylinder through the induced draft fan, so that the negative pressure of the regenerated drying cylinder is good; and the negative pressure of the regenerated drying cylinder is improved to form a positive pressure, so that the content of oxygen-containing fresh air is reduced, resulting in the regeneration burner being unable to fully burn, wasting energy, and the temperature of the regenerated material always hovering around 100 degrees Celsius.

[0058] Moreover, the flue gas recovery system 140 includes a main body, a first conduit and a second conduit; the two ends of the main body are connected to the first conduit and the second conduit respectively; the first conduit is connected to the regeneration storage barrel, and the second conduit is connected to the primary drying cylinder; the main body extends vertically, and the main body is equipped with a flue gas induced draft fan, which is used to guide the flue gas from the regeneration storage barrel to the primary drying cylinder. That is, the main body of the induced air is vertically connected up and down, which reduces the cross-sectional area of ​​the induced air duct caused by the adhesion of asphalt smoke and the accumulation of dust, and is not easy to clean or find.

[0059] In addition, a deceleration fan is arranged at the outlet of the second duct, that is, a fan-shaped deceleration device is installed at the outlet pipe of the induced draft fan to reduce the high wind pressure and high wind speed at the outlet of the induced draft fan, thereby reducing the wind pressure imbalance caused by the high wind speed to the primary burner flame, avoiding the negative pressure of the primary drying cylinder being too low, and making the primary burner burn more fully.

[0060] In addition, in order to detect the pressure in the regeneration storage barrel and the original drying cylinder, the flue gas recovery system 140 also includes a first pressure detection unit and a second pressure detection unit. The first pressure detection unit is configured in the regeneration storage barrel, and the second pressure detection unit is configured in the original drying cylinder.

[0061] Based on the above-mentioned asphalt mixing station 100, the present embodiment further provides an asphalt mixing station 100 control method, which is implemented by using the asphalt mixing station 100 as any one of the above-mentioned embodiments, receiving a first temperature signal representing the temperature at the air inlet of the regeneration induced draft fan 111, receiving a second temperature signal representing the temperature of the cold material bin 121, receiving a third temperature signal representing the temperature at the air inlet of the original induced draft fan, receiving a fourth temperature signal representing the temperature at the air outlet of the regeneration induced draft fan 111, and receiving a fifth temperature signal representing the temperature at the air outlet of the original induced draft fan;

[0062] Confirm whether the temperature at the air inlet of the regeneration induced draft fan 111, the temperature at the air inlet of the primary induced draft fan, the temperature at the air outlet of the regeneration induced draft fan 111, and the temperature at the air outlet of the primary induced draft fan are greater than a first preset temperature;

[0063] When one or more of the temperature at the air inlet of the regeneration induced draft fan 111, the temperature at the air inlet of the primary induced draft fan, the temperature at the air outlet of the regeneration induced draft fan 111, and the temperature at the air outlet of the primary induced draft fan is greater than a first preset temperature, the corresponding heat exchange component is controlled to operate;

[0064] When multiple of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component are in working state, if the temperature of the cold material bin 121 is greater than the second preset temperature, one of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component in operation is controlled to stop operating.

[0065] In summary, the control method of the asphalt mixing station 100 is based on the temperature at the air inlet of the regeneration induced draft fan 111, the temperature of the cold material bin 121, the temperature at the air inlet of the primary induced draft fan, and the temperature at the exhaust port of the regeneration induced draft fan 111, that is, the temperature at the exhaust port of the primary induced draft fan, so that the heat at the air inlet and exhaust port of the regeneration induced draft fan 111 and the primary induced draft fan can be recycled and utilized. Moreover, in the process of recycling and utilizing, the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component are controlled to work based on the premise that the temperature of each of the aforementioned positions is greater than the first preset temperature. The purpose is to make one or more of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component recover more heat than the heat converted by the corresponding power consumption of one or more of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component in operation, so that the heat recovery can effectively reduce the power consumption of heating the stone in the cold material bin 121, which is beneficial to reduce the energy consumption of the asphalt mixing station 100.

[0066] In addition, when controlling the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component, it is necessary to selectively control the operating states of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange group based on the temperature at the air inlet, the temperature of the cold material bin 121, the temperature at the air inlet of the primary induced draft fan, the temperature at the exhaust port of the regeneration induced draft fan 111, that is, the temperature at the exhaust port of the primary induced draft fan, so as to avoid the recovered heat being less than the operating power consumption of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange group;

[0067] Moreover, when the temperature of the cold material bin 121 rises to the second preset temperature, it is necessary to selectively control one or more of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange group to shut down based on the recovered heat. The purpose is to control the temperature of the cold material bin 121 to prevent it from being too high. At the same time, it is necessary to gradually shut down the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange group to prevent the temperature of the cold material bin 121 from dropping too fast. In addition, during the shutdown process, the working status of the heat exchange components in operation is controlled.

[0068] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A control method for an asphalt mixing station, implemented by an asphalt mixing station, characterized in that: The asphalt mixing plant includes a recycling building, a primary building and a waste heat recovery system; The waste heat recovery system comprises a first heat exchange component and a heat dissipation and exhaust component, wherein the heat dissipation and exhaust component is connected to the first heat exchange component; The first heat exchange component is arranged at the air inlet of the regeneration induced draft fan of the regeneration building, and is used to absorb the waste heat in the tail gas introduced into the regeneration induced draft fan; the first heat exchange component includes a plurality of heat exchange units, and the plurality of heat exchange units are arranged in sequence and at intervals along the extension direction of the induced draft duct of the regeneration induced draft fan; The asphalt mixing station also includes a second heat exchange component, a third heat exchange component and a fourth heat exchange component; The second heat exchange component is arranged at the air inlet of the primary induced draft fan of the primary building, and is used to absorb the residual heat of the tail gas introduced into the primary induced draft fan; the third heat exchange component is arranged at the air outlet of the regeneration induced draft fan, and is used to absorb the residual heat of the tail gas discharged by the regeneration induced draft fan; the fourth heat exchange component is arranged at the air outlet of the primary induced draft fan, and is used to absorb the residual heat of the tail gas discharged by the primary induced draft fan; The heat dissipation and exhaust assembly is arranged in the cold material bin of the raw material building, and the heat dissipation and exhaust assembly is used to blow the residual heat absorbed by at least one of the first heat exchange assembly, the second heat exchange assembly, the third heat exchange assembly and the fourth heat exchange assembly toward the cold material bin; The asphalt mixing station control method comprises: Receiving a first temperature signal representing the temperature at the air inlet of the regenerative induced draft fan, receiving a second temperature signal representing the temperature of the cold material bin, receiving a third temperature signal representing the temperature at the air inlet of the primary induced draft fan, receiving a fourth temperature signal representing the temperature at the air outlet of the regenerative induced draft fan, and receiving a fifth temperature signal representing the temperature at the air outlet of the primary induced draft fan; Confirm whether the temperature at the air inlet of the regeneration induced draft fan, the temperature at the air inlet of the primary induced draft fan, the temperature at the air outlet of the regeneration induced draft fan, and the temperature at the air outlet of the primary induced draft fan are greater than a first preset temperature; When one or more of the temperature at the air inlet of the regenerative induced draft fan, the temperature at the air inlet of the primary induced draft fan, the temperature at the air outlet of the regenerative induced draft fan, and the temperature at the air outlet of the primary induced draft fan is greater than the first preset temperature, controlling the corresponding heat exchange component to operate; When multiple of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component are in working condition, if the temperature of the cold material bin is greater than the second preset temperature, one of the first heat exchange component, the second heat exchange component, the third heat exchange component and the fourth heat exchange component in operation is controlled to stop operating.

2. The asphalt mixing plant control method according to claim 1, characterized in that: The waste heat recovery system further includes a first temperature detection unit, a second temperature detection unit, a third temperature detection unit, a fourth temperature detection unit and a fifth temperature detection unit; The first temperature detection unit is configured at the air inlet of the regeneration induced draft fan, the second temperature detection unit is configured in the cold material bin, the third temperature detection unit is configured at the air inlet of the primary induced draft fan, the fourth temperature detection unit is configured at the exhaust port of the regeneration induced draft fan, and the fifth temperature detection unit is configured at the exhaust port of the primary induced draft fan.

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