A manufacturing device and coating method for blast-type heating coating modified regenerated fine sand

Abstract

The invention discloses a manufacturing device and a coating method for blast-type heated modified regenerated fine sand. The manufacturing device comprises a feed port device, an air blast device, a heating device, a stirring device, a cylinder, a cyclone separation device, a coating agent spraying device, a liquid feeding device, a first discharge port device, a second discharge port device and an exhaust device. The invention adopts a heating device to heat the sand material, thereby improving the strength and stability of the coated sand. The air blast device and the coating agent spraying device are used to suspend and coat the heated sand material, so that the coating agent is fully mixed with the surface of the sand material, thereby avoiding agglomeration and improving the coating effect. The coating agent spraying device and the air blast device are used to realize uniform spraying and rapid drying of the coating agent, thereby improving production efficiency. The cyclone separation technology and the rotating airflow principle of the cyclone separator are used to realize particle size screening of particles, thereby improving the product quality of the coated sand.

Description

Technical Field

[0001] The invention belongs to the technical field of building materials, and in particular relates to a manufacturing device and a coating method for blast-type heated coating-modified regenerated fine sand. Background Art

[0002] The coated modified regenerated fine sand is a core sand with a layer of solid resin film wrapped on the surface of the sand particles. The thermal coating process is adopted: the sand is heated to a certain temperature, and then the resin is sprayed to coat the surface of the sand particles, and the curing agent aqueous solution is added to solidify at high temperature, and finally the coated modified regenerated sand is obtained by screening, which is used for permeable bricks and cast steel components. The use of regenerated sand (including desert sand and foundry sand) is a general trend and has potential. The existing patents include "A drum-type integrated wet regeneration and dehydration equipment for old sand and its use method", which controls the liquid level in the water tank to make the drum-type integrated wet regeneration and dehydration equipment for old sand in the old sand regeneration state or centrifugal dehydration state to prepare regenerated sand, and "A water glass old sand regeneration method" uses ultrasound, centrifugal stirring and electric heating devices to increase the efficiency of regeneration and prepare regenerated sand.

[0003] However, the regenerated sand currently prepared still has some defects, especially in the new products and building materials prepared by using regenerated sand, a large amount of wastewater is generated, and additional wastewater treatment facilities are required, which increases the environmental burden and treatment costs, has high energy consumption and high operating costs, so it is necessary to coat the regenerated sand to prepare products with various properties such as air permeability, water permeability, and oil permeability. In the face of this regenerated sand, in the process of preparing new building materials, "A drum-type old sand wet regeneration and dehydration integrated equipment and its use method", "A water glass old sand regeneration method" prepare regenerated sand, the application of regenerated sand has certain defects, in the process of preparing concrete, it cannot be used efficiently, the bonding effect is not good, and the desert sand particles are too fine to be used normally. With the development of technology, there are some new technologies for the application of regenerated sand, water-permeable, air-permeable, oil-permeable, waterproof and water-retaining, waterproof carpets, these products require the technology of coating the regenerated sand.

[0004] Now we can control the polymer materials to coat the regenerated sand, and the current coating technology patents can achieve the effect. However, these patents have defects in the coating process, such as in the process of preparing materials (permeable bricks). The current coating technologies include centrifugal stirring coating (easy to bond, the coating method can only be achieved by stirring, and the time is uncontrollable. Even if the coating is successful, the thickness of the coating is different and the particle size is different), and roller coating. However, in the preparation process, the binder will stick to each other, causing the sand particles to agglomerate and accumulate, resulting in excessive particle size, and it is not easy to screen the particle size. If grinding and crushing are used, the coating interface structure on the surface of the original material will be destroyed. During the stirring process, the time is unstable, and the heating and consolidation time cannot be accurately controlled, which reduces the product quality of the coated sand. Therefore, it is necessary to study an efficient, energy-saving, and stable manufacturing device for coated modified regenerated fine sand and its coating method. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a manufacturing device and a coating method for blast-type heated regenerated fine sand, and the preparation method has the advantages of high efficiency, energy saving and stability.

[0006] The technical solution adopted by the present invention is as follows: an embodiment of the present invention provides a device for manufacturing blast-type heated modified regenerated fine sand, comprising a feed port device (1), a blast heating system, a stirring device (4), a cylinder (5), a coating system, a first discharge port device (9-1), a second discharge port device (9-2) and an exhaust device (11);

[0007] The feed inlet device (1) is connected to the lower side of the cylinder (5) to facilitate the regenerated fine sand particles to enter the stirring device (4); the cylinder (5) is connected to the blast heating system on one side, and the blast heating system is used to output hot air; the feed inlet device (1) is used to store the sand material that has been screened to be processed, and the feed inlet device (1) is equipped with a first stirrer and a hopper, and the first stirrer is connected to a first stirring motor (1-1) to facilitate the adjustment of the feeding speed and weight; the stirring device (4) is connected to the lower part of the cylinder (5), and the upper part of the cylinder (5) is provided with a cylinder temperature measuring device (5-1);

[0008] The coating system comprises a cyclone separation device (6), a coating agent spraying device (7) and a liquid feeding device (8), wherein the cyclone separation device (6) is connected to the cylinder (5) via a pipeline, and the liquid feeding device (8) uses a feeding motor (8-1) to transport the coating agent and curing agent in its storage tank to the coating agent spraying device (7) via a pipeline, and the coating agent spraying device (7) sprays the coating agent and curing agent so that the coating agent is uniformly cured on the surface of the regenerated fine sand particles in the cyclone separation device (6); the cyclone separation device (6) uses the principle of rotating airflow, and when particles of different particle sizes enter the cyclone separation device, due to the action of centrifugal force, larger particles are thrown to the wall of the device, and then slide down along the wall into the first discharge port device (9-1), while smaller particles are discharged from its upper outlet and discharged from the second discharge port device (9-2), thereby achieving continuous particle size classification of the coated sand;

[0009] The first discharge port device (9-1) and the second discharge port device (9-2) are both equipped with sensors and actuators for controlling the discharge rate or responding to the blockage of the discharge port, and for collecting the coated solid particles separated from the airflow; the cyclone separation device (6) is also connected to the exhaust device (11), and the exhaust device (11) is used to ensure that the gas can flow out of the cyclone separation device (6) smoothly.

[0010] According to an optional embodiment of the present invention, the blast heating system comprises an blast device (2) and a heating device (3), wherein the blast device (2) is used to provide wind power, and the heating device (3) is used to convert the wind power into hot air to heat the regenerated fine sand entering from the feed inlet device (1).

[0011] According to an optional embodiment of the present invention, the blowing device (2) is a blower, and the heating device (3) is a structure selected from the group consisting of a coal heating furnace, an oil heating furnace, a gas heating furnace, a steam heating furnace, and an electric heating plate.

[0012] According to an optional embodiment of the present invention, the stirring device (4) comprises a second stirrer (4-2) and a second stirring motor (4-1) connected to the second stirrer (4-2).

[0013] According to an optional embodiment of the present invention, the manufacturing device further comprises a control system (12), wherein the control system (12) is used to monitor the operating conditions of various functional structures of the manufacturing device.

[0014] The embodiment of the present invention further provides a film coating method for modified regenerated fine sand by blast heating, which is implemented by using a manufacturing device for modified regenerated fine sand by blast heating as in the above embodiment, and includes the following steps:

[0015] Step S1, pouring sand material into the feed port device (1), controlling the feeding speed and weight of the sand material in the feed port device (1) to be adjusted at 1kg / min to 50kg / min, and starting the stirring device (4) to evenly stir the sand material in the feed port device (1);

[0016] Step S2, hot air is introduced into the feed port device (1) through the blast heating system, the heating temperature is 50°C to 250°C, and the air flow rate of the blast device (2) is 500 to 10000m 3 / h, the circumferential air velocity in the drying chamber is high, the material residence time is short, the sand material is heated and pre-treated, effectively preventing the material from sticking to the wall, and can be heated and dried into a uniform powder material at one time;

[0017] Step S3, using the blowing device (2) to move the heated sand material from bottom to top in the stirring channel, the sand material particles are dispersed at high speed in the hot air flow, and a temperature measuring point of 80° C. to 200° C. is provided on the top to ensure the best estimated temperature of particles of different particle sizes entering the coating process and smoothly entering the interior of the cyclone separation device (6);

[0018] Step S4, the sand material moves in the cyclone separation device (6), which is an organic combination of cyclone technology, fluidization technology, spraying technology and convection technology. The coating agent and the curing agent are provided by the liquid feeding device (8), and the coating agent spraying device (7) effectively and evenly sprays the coating agent and the curing agent in sequence to cure the resin on the surface of the sand material. The weight ratio of each component in the additive is: coating agent: curing agent = (3-6): (1-2);

[0019] Step S5, using the wind force provided by the blowing device (2) to screen the coated modified sand in the cyclone separation device (6), while promoting the rapid drying and solidification of the coating agent;

[0020] Step S6, collecting the sand material deposited after coating through the first discharge port device (9-1) or the second discharge port device (9-2) to obtain the coated and modified fine sand.

[0021] According to an optional embodiment of the present invention, step S6 further comprises: an exhaust device (11) allows the gas to flow smoothly out of the cyclone separation device (6).

[0022] Compared with the prior art, the embodiment of the present invention provides a manufacturing device and coating method of blast-type heated regenerated fine sand, which has the following beneficial effects: (1) The sand material is heated by a heating device, thereby improving the strength and stability of the coated sand. (2) The heated sand material is suspended and coated by an air blast device and a coating agent spraying device, so that the coating agent and the surface of the sand material are fully mixed, thereby avoiding agglomeration and improving the coating effect. (3) The coating agent spraying device and the air blast device are used to achieve uniform spraying and rapid drying of the coating agent, thereby improving production efficiency. (4) The manufacturing device has a simple structure, is easy to operate, and is easy to maintain. Input, heating, coating, drying, and output are completed at one time in a set of equipment, thereby avoiding environmental pollution. (5) The innovative point of the coating technology designed in the present invention is the fully automatic measuring coating time and temperature detector. First, the spray drying technology is used, so that the cyclone can be used to make the individual particles stable in the suspension process to achieve precise single-particle spray coating. Second, after coating, the temperature is accurately controlled to achieve precise control of the coating time and the coating forming process. Third, the cyclone separation technology and the rotating airflow principle of the cyclone separator are used to achieve particle size screening, thereby improving the product quality of the coated sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic structural diagram of a device for manufacturing fine sand by blast heating regeneration is provided for an embodiment of the present application.

[0025] Figure 2 A schematic structural diagram of a feed port device in a device for manufacturing fine sand by blast-type heating regeneration is provided for an embodiment of the present application.

[0026] Figure 3 A schematic structural diagram of a coating agent spraying device in a device for manufacturing fine sand by blast-type heating regeneration is provided for an embodiment of the present application.

[0027] Figure 4 A schematic structural diagram of a liquid feeding device in a device for manufacturing fine sand by blast-type heating regeneration is provided for an embodiment of the present application.

[0028] Figure 5 A schematic structural diagram of a first discharge port in a device for manufacturing fine sand by blast-type heating regeneration is provided for an embodiment of the present application.

[0029] Figure 6A schematic diagram of the structure of an agitator, a cylinder and a motor in a device for manufacturing fine sand by blast-type heating and regeneration is provided for an embodiment of the present application.

[0030] Figure 7 A schematic diagram of the structure of a blast device in a blast-type heating regenerated fine sand manufacturing device is provided for an embodiment of the present application.

[0031] Figure 8 A schematic diagram of the structure of a heating device in a device for manufacturing regenerated fine sand by blast heating is provided for an embodiment of the present application.

[0032] Fig. 9 A schematic structural diagram of a cyclone separation device in a device for producing fine sand by blast-type heating regeneration is provided for an embodiment of the present application.

[0033] Fig.10 A schematic diagram of the structure of an exhaust device in a device for manufacturing fine sand by blast-type heating and regeneration is provided for an embodiment of the present application.

[0034] Fig.11 A schematic diagram of a control system in a device for manufacturing fine sand by blast heating regeneration is provided for an embodiment of the present application.

[0035] Figure numerals: feed port device 1, blowing device 2, heating device 3, stirring device 4, cylinder 5, cylinder temperature measuring device 5-1, cyclone separation device 6, coating agent spraying device 7, liquid feeding device 8, first discharge port device 9-1, second discharge port device 9-2, first storage box 10-1, second storage box 10-2, exhaust device 11 and control system 12. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0037] like Figures 1 to 10 As shown, an embodiment of the present invention provides a manufacturing device for blast-type heating modified regenerated fine sand, including a feed port device 1, a blast heating system, a stirring device 4, a cylinder 5, a coating system, a first discharge port device 9-1, a second discharge port device 9-2 and an exhaust device 11.

[0038] The feed port device 1 is connected to the lower side of the cylinder 5 to facilitate the regenerated fine sand particles to enter the stirring device 4. A blast heating system is connected to one side of the cylinder 5, and the blast heating system is used to output hot air. The feed port device 1 is used to store the sand material that has been screened to be processed. The feed port device 1 is equipped with a first agitator and a hopper. The first agitator is externally connected to a first stirring motor 1-1 to facilitate adjusting the speed and weight of the feed. The stirring device 4 is connected to the lower part of the cylinder 5, and the stirring device 4 includes a second agitator 4-2 and a second stirring motor 4-1 connected to the second agitator 4-2.

[0039] A cylinder temperature measuring device 5-1 is provided on the upper part of the cylinder 5. The hopper size and shape of the feed inlet device 1 match the inlet of the preheating stirring device to ensure that the sand material can flow completely into the manufacturing device while preventing the particles from spilling. The fine sand entering from the inlet is evenly mixed with the hot air during the stirring process of the stirring device 4, achieving heating pretreatment before the fine sand particles are coated and modified, which facilitates the rapid consolidation of the coating modifier on the surface of the sand particles.

[0040] The blast heating system includes a blast device 2 and a heating device 3. The blast device 2 is used to provide wind power, and the heating device 3 is used to convert the wind power into hot air to heat the regenerated fine sand entering from the feed inlet device 1. The blast device 2 is a blower, and the heating device 3 is a structure selected from a coal heating furnace, an oil heating furnace, a gas heating furnace, a steam heating furnace, and an electric heating plate.

[0041] The coating system includes a cyclone separation device 6, a coating agent spraying device 7 and a liquid feeding device 8. The cyclone separation device 6 is connected to the cylinder 5 through a pipeline. The liquid feeding device 8 uses a feeding motor 8-1 to transport the coating agent and curing agent in its storage tank to the coating agent spraying device 7 through a pipeline. The coating agent spraying device 7 sprays the coating agent and curing agent to uniformly solidify them on the surface of the regenerated fine sand particles in the cyclone separation device 6. The cyclone separation device 6 uses the principle of rotating airflow. When particles with different particle sizes enter the cyclone separation device, due to the action of centrifugal force, larger particles are thrown to the wall of the device, and then slide down along the wall to the first discharge port device 9-1, while smaller particles are discharged from its upper outlet and discharged from the second discharge port device 9-2, thereby realizing the continued particle size classification of the coated sand.

[0042] The first discharge port device 9-1 and the second discharge port device 9-2 are both equipped with sensors and actuators for controlling the discharge rate or responding to the blockage of the discharge port, and for collecting the coated solid particles separated from the airflow. Figure 5A first storage box 10-1 and a second storage box 10-2 are respectively provided below the first discharge port device 9-1 and the second discharge port device 9-2. The cyclone separation device 6 is also connected to an exhaust device 11, and the exhaust device 11 is used to allow gas to flow out of the cyclone separation device 6 smoothly.

[0043] The blast heating system includes a blast device 2 and a heating device 3, wherein the blast device 2 is used to provide wind power, and the heating device 3 is used to convert the wind power into hot air. The blast device 2 is a blower, and the heating device 3 is a structure selected from a coal heating furnace, an oil heating furnace, a gas heating furnace, a steam heating furnace, and an electric heating plate. The hot air is introduced into the agitator of the feed port device 1 to achieve pretreatment of heating and stirring the sand material, so that the sand material is heated evenly, and at the same time, the sand material is transported into the pipeline to move, and the sand material sprayed with the coating agent is dried by blasting, so that the coating agent is quickly solidified on the surface of the sand particles.

[0044] like Figure 1 and Fig.11 As shown, the manufacturing device also includes a control system 12, which is used to monitor the operating conditions of various functional structures of the manufacturing device. The control system includes sensors and detection equipment, actuators, control logic, human-machine interface, data processing and analysis, communication interface, safety protection, programmable logic controller, energy management, remote monitoring and control, etc.

[0045] In view of the fact that the current sand particle coating technology still uses the traditional coated sand technology using centrifugal stirring, thermoplastic phenolic resin, latent curing agent (such as urotropine) and raw sand are used to stir and mix, and heated to solidify and form. After production, due to the stickiness of the auxiliary materials, the coated sand will stick together. The traditional grinding method is costly, complex in structure, and has high crushing cost. It is also easy to damage the coating on the surface of the coated sand, thereby reducing the product quality of the coated sand. The present invention uses a cyclone separator device, which utilizes the cyclone separation technology and the principle of rotating airflow. When particles of different particle sizes enter the cyclone separator, due to the action of centrifugal force, larger particles are thrown to the wall of the device, and then slide down the wall into the dust hopper, while smaller particles are discharged from the upper outlet of the equipment, thereby realizing the continued particle size classification of the coated sand, solving the problem of particle agglomeration, and improving the product quality of the coated sand.

[0046] The embodiment of the present invention further provides a film coating method for modified regenerated fine sand by blast heating, which is implemented by using a manufacturing device for modified regenerated fine sand by blast heating as in the above embodiment, and includes the following steps:

[0047] Step S1, pouring sand material into the feed port device 1, controlling the feeding speed and weight of the sand material in the feed port device 1 to adjust the feeding speed to 1kg / min to 50kg / min, and starting the stirring device 4 to evenly stir the sand material in the feed port device 1;

[0048] Step S2, hot air is introduced into the feed port device 1 through the blast heating system, the heating temperature is 50℃~250℃, and the air flow rate of the blast device 2 is 500~10000m 3 / h, the circumferential air velocity in the drying chamber is high, the material residence time is short, the sand material is heated and pre-treated, effectively preventing the material from sticking to the wall, and can be heated and dried into a uniform powder material at one time;

[0049] Step S3, using the blast device 2 to move the heated sand material from bottom to top in the stirring channel, the sand material particles are dispersed at high speed in the hot air flow, and a temperature measuring point of 80°C to 200°C is set on the top to ensure the best estimated temperature of particles of different particle sizes entering the coating link and smoothly entering the cyclone separation device 6;

[0050] Step S4, the sand material moves in the cyclone separation device 6, which is an organic combination of cyclone technology, fluidization technology, spraying technology and convection technology. The liquid feeding device 8 is used to provide the coating agent and the curing agent. The coating agent spraying device 7 is used to effectively and evenly spray the coating agent and the curing agent in sequence to cure the resin on the surface of the sand material. The weight ratio of each component in the additive is: coating agent: curing agent = (3-6): (1-2);

[0051] Step S5, using the wind force provided by the blowing device 2 to screen the coated modified sand in the cyclone separation device 6, and at the same time promoting the rapid drying and solidification of the coating agent;

[0052] Step S6, collecting the sand material deposited after coating through the first discharge port device (9-1) or the second discharge port device (9-2) to obtain the coated and modified fine sand.

[0053] Preferably, step S6 further comprises: the exhaust device 11 allows the gas to flow out of the cyclone separation device 6 smoothly.

[0054] Below, reference Figures 1 to 11 The present invention also provides 9 embodiments to illustrate the specific technical solutions and functions of each structural device:

[0055] Example 1: Reference Figure 1 and Figure 8The heating device in the sand machine uses an electric heater as a heating device, and passes hot air into the stirring device to heat the sand material to improve the strength and stability of the coated sand. Heat is generated by passing current through the heating element, and the hot air passed into the stirring device is used to heat the sand material. The electric heater has the advantages of high efficiency, energy saving, and environmental protection. It can quickly heat the sand material to the required temperature and improve the strength and stability of the coated sand. At the same time, the electric heater can also achieve precise temperature control to ensure that the sand material is heated evenly and avoid poor coating effect caused by uneven temperature. Using an electric heater as a heating device can not only improve the quality of the coated sand, but also reduce production costs and improve production efficiency. In addition, the electric heater also has low maintenance costs and a long service life, which can ensure the stable operation of the equipment.

[0056] Example 2: Reference Figure 1 and Figure 2 The feed port device in the machine can precisely control the speed and weight of the feed by adjusting the control mechanism of the feed port device, such as the agitator and the hopper, to ensure that the sand material can enter the manufacturing device evenly. The feed port device is equipped with an agitator and a hopper to control the speed and weight of the feed. The agitator can generate vibrations so that the sand material can enter the hopper smoothly, and the speed of the feed can be precisely controlled by adjusting the vibration frequency and amplitude. The hopper is used to store the sand material to be processed, and the weight of the feed can be controlled by adjusting the opening degree of the hopper. By precisely controlling the speed and weight of the feed, it can be ensured that the sand material can enter the manufacturing device evenly, avoiding poor coating effect caused by uneven feed.

[0057] Example 3: Reference Figure 1 , Figure 2 , Figure 6 and Figure 8 The heating device in the heating device uses gas as the energy source of the heating device, and passes the hot air into the stirring device to achieve heating pretreatment of the sand material. The heating device uses gas as the energy source, generates heat by burning gas to form hot air. The hot air is transported to the stirring device through a pipeline and is fully mixed with the sand material to achieve heating pretreatment of the sand material. The gas heating device has the advantages of high efficiency, energy saving, and environmental protection. It can quickly heat the sand material to the required temperature and improve the strength and stability of the coated sand. At the same time, the gas heating device can also achieve precise temperature control to ensure that the sand material is heated evenly and avoid poor coating effect caused by uneven temperature. In addition, the gas heating device can also flexibly adapt to different production needs and has good adaptability.

[0058] Example 4: Reference Figure 1 and Fig. 9The cyclone separation device in the device is used to classify the particle size of the coated sand, and the larger particles are thrown toward the wall of the device and slide down along the wall into the dust hopper, while the smaller particles are discharged from the upper outlet of the equipment. The cyclone separation device uses the principle of rotating airflow. When particles of different particle sizes enter the cyclone separation device, due to the action of centrifugal force, the larger particles are thrown toward the wall of the device, and then slide down along the wall into the dust hopper, while the smaller particles are discharged from the upper outlet of the equipment. The cyclone separation device can be used to classify the particle size of the coated sand, separate the larger particles from the smaller particles, and thus improve the quality of the coated sand. In addition, the cyclone separation device can also effectively collect dust and keep the production environment clean.

[0059] Example 5: Reference Figure 1 , Figure 3 , Figure 4 and Fig. 9 The coating agent spraying device and the liquid feeding device in the coating agent spraying device are used to evenly spray the resin and the curing agent on the surface of the heated sand material through the liquid feeding device and the coating agent spraying device, so as to achieve uniform coating and rapid drying of the coating agent. The liquid feeding device conveys the polyurethane-modified epoxy resin and the amine curing agent in the storage tank to the spraying device through a motor. The coating agent spraying device sprays the coating agent and the curing agent evenly on the surface of the heated sand material through a nozzle, so that the coating agent is evenly cured on the surface of the sand material. The liquid feeding device and the coating agent spraying device can achieve uniform coating and rapid drying of the coating agent, thereby improving the coating effect and production efficiency. In addition, the device can also accurately control the spraying amount to ensure uniform coating of the coating agent.

[0060] Case 6: Reference Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 The air blast device and the heating device in the air blast device and the heating device introduce temperature measuring points in the air blast device and the heating device to ensure the best estimated temperature of the particles entering the coating process and improve the coating effect. In this implementation case, a temperature measuring point is introduced in the air blast device to measure the temperature of the particles. The temperature measuring point can monitor the temperature of the particles in real time, and adjust the heating power of the heating device through the control system to ensure the best estimated temperature of the particles entering the coating process. By precisely controlling the temperature of the particles, the coating effect can be improved and poor coating effect caused by inappropriate temperature can be avoided. In addition, the introduction of temperature measuring points can also monitor the temperature changes in the production process in real time, adjust the heating power in time, and ensure the stability of product quality.

[0061] Embodiment 7: Reference Figure 1 , Fig. 9 and Fig.11The discharge port device and control system in the discharge port device, through the control system of the discharge port device, such as sensors and actuators, accurately control the discharge rate and respond to the blockage of the discharge port. The discharge port device is equipped with sensors and actuators to control the discharge rate and respond to the blockage of the discharge port. The sensor can monitor the discharge situation of the discharge port in real time, and adjust the opening and closing degree of the discharge port through the actuator to accurately control the discharge rate. When the discharge port device is equipped with sensors and actuators, it is used to control the discharge rate and respond to the blockage of the discharge port. The sensor can monitor the discharge situation of the discharge port in real time, and adjust the opening and closing degree of the discharge port through the actuator to accurately control the discharge rate. When the discharge port is blocked, the actuator can respond in time and take measures to solve the problem to ensure the smooth flow of the discharge port.

[0062] Example 8: Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 The coating agent spraying device in the coating system is added with multiple spraying devices to achieve multi-directional and uniform spraying of the coating agent and the curing agent. Multiple spraying devices are added to the coating system, which are located at different positions, to achieve multi-directional and uniform spraying of the coating agent and the curing agent. Multiple spraying devices can work at the same time, spraying the coating agent and the curing agent evenly from different directions so that they are evenly covered on the surface of the sand material. By adding multiple spraying devices, the coating effect can be improved and poor coating effect caused by uneven spraying can be avoided. In addition, this solution can also improve production efficiency and shorten production cycle.

[0063] Example 9: Reference Figure 1 and Fig.11 , the control system accurately controls the entire manufacturing process to ensure the stability of product quality. In this implementation case, the control system accurately controls the entire manufacturing process, including parameters such as feed rate, heating temperature, and spraying amount. By accurately controlling these parameters, the stability of product quality can be guaranteed and production efficiency can be improved. In addition, the control system also has data storage and statistical functions, which can record production data for subsequent analysis and optimization of the production process.

[0064] The above implementation cases all reflect the technical solutions and functions of various structural devices of the present invention, which can effectively improve the manufacturing efficiency and product quality of the coated modified regenerated fine sand. By adopting different heating devices, control mechanisms, spraying devices, etc., different production needs can be met to achieve efficient, energy-saving and stable manufacturing of coated modified regenerated fine sand.

[0065] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered within the protection scope of the present invention. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be based on the scope defined by the claims.

Claims

1. A device for producing blast-type heating-modified regenerated fine sand, characterized in that: It comprises a feed port device (1), a blast heating system, a stirring device (4), a cylinder (5), a coating system, a first discharge port device (9-1), a second discharge port device (9-2) and an exhaust device (11); The feed inlet device (1) is connected to the lower side of the cylinder (5) to facilitate the regenerated fine sand particles to enter the stirring device (4); the cylinder (5) is connected to the blast heating system on one side, and the blast heating system is used to output hot air; the feed inlet device (1) is used to store the sand material that has been screened to be processed, and the feed inlet device (1) is equipped with a first stirrer and a hopper, and the first stirrer is connected to a first stirring motor (1-1) to facilitate the adjustment of the feeding speed and weight; the stirring device (4) is connected to the lower part of the cylinder (5), and the upper part of the cylinder (5) is provided with a cylinder temperature measuring device (5-1); The coating system comprises a cyclone separation device (6), a coating agent spraying device (7) and a liquid feeding device (8), wherein the cyclone separation device (6) is connected to the cylinder (5) via a pipeline, and the liquid feeding device (8) uses a feeding motor (8-1) to transport the coating agent and curing agent in its storage tank to the coating agent spraying device (7) via a pipeline, and the coating agent spraying device (7) sprays the coating agent and curing agent so that the coating agent is uniformly cured on the surface of the regenerated fine sand particles in the cyclone separation device (6); the cyclone separation device (6) uses the principle of rotating airflow, and when particles of different particle sizes enter the cyclone separation device, due to the action of centrifugal force, larger particles are thrown to the wall of the device, and then slide down along the wall into the first discharge port device (9-1), while smaller particles are discharged from its upper outlet and discharged from the second discharge port device (9-2), thereby achieving continuous particle size classification of the coated sand; The first discharge port device (9-1) and the second discharge port device (9-2) are both equipped with sensors and actuators for controlling the discharge rate or responding to the blockage of the discharge port, and for collecting the coated solid particles separated from the airflow; the cyclone separation device (6) is also connected to the exhaust device (11), and the exhaust device (11) is used to ensure that the gas can flow out of the cyclone separation device (6) smoothly.

2. The device for producing the blast-type heating-modified regenerated fine sand according to claim 1, characterized in that: The blast heating system comprises an blast device (2) and a heating device (3), wherein the blast device (2) is used to provide wind power, and the heating device (3) is used to convert the wind power into hot air to heat the regenerated fine sand entering from the feed inlet device (1).

3. The device for producing the blast-type heating-modified regenerated fine sand according to claim 2, characterized in that: The blowing device (2) is a blower, and the heating device (3) is a structure selected from the group consisting of a coal heating furnace, an oil heating furnace, a gas heating furnace, a steam heating furnace, and an electric heating plate.

4. The device for producing the blast-type heating-modified regenerated fine sand according to claim 1, characterized in that: The stirring device (4) comprises a second stirrer (4-2) and a second stirring motor (4-1) connected to the second stirrer (4-2).

5. The device for producing the blast-type heating-modified regenerated fine sand according to claim 1, characterized in that: The manufacturing device also includes a control system (12), wherein the control system (12) is used to monitor the operating conditions of various functional structures of the manufacturing device.

6. A method for coating regenerated fine sand by blast heating, which is realized by using a manufacturing device for regenerated fine sand by blast heating as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: Step S1, pouring sand material into the feed port device (1), controlling the feeding speed and weight of the sand material in the feed port device (1) to be adjusted at 1kg / min to 50kg / min, and starting the stirring device (4) to evenly stir the sand material in the feed port device (1); Step S2, hot air is introduced into the feed port device (1) through the blast heating system, the heating temperature is 50°C to 250°C, and the air flow rate of the blast device (2) is 500 to 10000m 3 / h, the circumferential air velocity in the drying chamber is high, the material residence time is short, the sand material is heated and pre-treated, effectively preventing the material from sticking to the wall, and can be heated and dried into a uniform powder material at one time; Step S3, using the blowing device (2) to move the heated sand material from bottom to top in the stirring channel, the sand material particles are dispersed at high speed in the hot air flow, and a temperature measuring point of 80° C. to 200° C. is provided on the top to ensure the best estimated temperature of particles of different particle sizes entering the coating process and smoothly entering the interior of the cyclone separation device (6); Step S4, the sand material moves in the cyclone separation device (6), which is an organic combination of cyclone technology, fluidization technology, spraying technology and convection technology. The coating agent and the curing agent are provided by the liquid feeding device (8), and the coating agent spraying device (7) effectively and evenly sprays the coating agent and the curing agent in sequence to cure the resin on the surface of the sand material. The weight ratio of each component in the additive is: coating agent: curing agent = (3-6): (1-2); Step S5, using the wind force provided by the blowing device (2) to screen the coated modified sand in the cyclone separation device (6), while promoting the rapid drying and solidification of the coating agent; Step S6, collecting the sand material deposited after coating through the first discharge port device (9-1) or the second discharge port device (9-2) to obtain the coated and modified fine sand.

7. A film coating method for modified regenerated fine sand by blast heating according to claim 6, characterized in that: Step S6 also includes: the exhaust device (11) allows the gas to flow smoothly out of the cyclone separation device (6).

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