Powder modifying device

Abstract

The utility model relates to a kind of powder modification device, including heater, modification host computer, raw material bin, modifier feeder, dust catcher and high-pressure fan, the air outlet of heater is connected to the raw material import of modification host computer by material hot air conveying pipeline;The discharge port of raw material bin is connected to the end of material hot air conveying pipeline close to heater by feeding and discharging valve;The exhaust port of high-pressure fan is connected with exhaust duct, the free end of exhaust duct is connected with first air valve, the branch of the middle part of exhaust duct forms return air duct, and the other end of return air duct is connected to the air inlet of heater.The utility model is integrated by clever hot energy recovery and wind force conveying system, utilizes the same high-pressure fan to provide positive and negative pressure wind force simultaneously, realizes synchronous preheating in powder conveying process, significantly improves modification effect and uniformity;While placing return air passage, redundant heat energy is collected and reused, and energy is saved.

Description

Technical Field

[0001] This utility model relates to the field of powder material modification technology, specifically to a powder modification device. Background Technology

[0002] In conventional powder modification processes, both the raw powder and the solid granular modifier are directly fed into the modifying machine. Since the raw powder is typically packaged in bulk bags, its temperature is usually at room temperature when it enters the machine. However, the solid granular modifier has a high melting temperature, typically between 70 and 90°C. When the solid modifier enters the modifying machine cavity along with a large amount of room-temperature raw powder, the heating system attempts to melt the modifier. However, the modifier's contact with the room-temperature material prevents it from reaching its melting point, directly resulting in poor powder modification and thus a suboptimal powder modification effect.

[0003] Furthermore, existing powder modification systems suffer from significant waste in thermal energy utilization. To control the micro-negative pressure environment within the modifying machine and prevent dust escape, the system is typically equipped with a dust collector and an induced draft fan. In conventional designs, the gas discharged from the induced draft fan at the rear of the dust collector, carrying a large amount of waste heat, is directly released into the atmosphere, resulting in a waste of thermal energy resources, which contradicts the current trend of green and energy-saving manufacturing development. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a powder modification device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A powder modification device includes a modifying main unit, a raw material silo, a modifier feeder, a dust collector, and a high-pressure blower. The discharge port of the modifying main unit is connected to the inlet on one side of the dust collector via a pipe, and the exhaust port on the other side of the dust collector is connected to the exhaust port of the high-pressure blower via a pipe. The modifier feeder is located beside the modifying main unit, and the discharge port of the modifier feeder is connected to the modifier inlet of the modifying main unit. The device also includes a heater, and the air outlet of the heater is connected to the raw material inlet of the modifying main unit via a material hot air conveying pipe. The material silo's discharge port is connected to the end of the material hot air conveying pipeline near the heater via a feed and discharge valve; The exhaust port of the high-pressure blower is connected to an exhaust pipe, the free end of the exhaust pipe is connected to a first air valve, the middle part of the exhaust pipe is branched to form a return air pipe, and the other end of the return air pipe is connected to the air inlet of the heater. The high-pressure blower provides the negative pressure required by the modification host and dust collector, and provides positive pressure to the return air duct to transport materials to the modification host.

[0006] Furthermore, the air inlet of the heater is connected to an air inlet pipe, the free end of the air inlet pipe is connected to a second air valve, and the other end of the return air pipe is connected to the middle of the air inlet pipe.

[0007] Furthermore, the dust collector is a pulse dust collector.

[0008] Furthermore, a dust collection and unloading valve is connected to the bottom outlet of the dust collector.

[0009] The beneficial effects of this utility model by adopting the above technical solution are as follows: This utility model ingeniously integrates heat energy recovery and wind power conveying system, and uses the same high-pressure blower to provide positive and negative pressure wind power at the same time, realizing synchronous preheating in the powder conveying process, which significantly improves the modification effect and uniformity; at the same time, the return air passage is set to collect and reuse excess heat energy, saving energy. Attached Figure Description

[0010] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a front view of the powder modification device of this utility model; Figure 2 This is a top view of the powder modification device of this utility model.

[0011] In the diagram: 1. Heater; 2. Material hot air conveying pipeline; 3. Modifier main unit; 4. Raw material silo; 5. Feed and discharge valve; 6. Modifier feeder; 7. Dust collector; 8. Dust collection and discharge valve; 9. High-pressure blower; 10. Exhaust pipeline; 11. First air valve; 12. Return air pipeline; 13. Air inlet pipe; 14. Second air valve. Detailed Implementation

[0012] like Figure 1-2 As shown, this embodiment provides a powder modification device, including a heater 1, a material hot air conveying pipeline 2, a modification host 3, a raw material silo 4, a modifier feeder 6, a pulse dust collector 7, and a high-pressure blower 9.

[0013] The discharge port of the modified main unit 3 is connected to the inlet of one side of the pulse dust collector 7 via a pipe. The exhaust port of the pulse dust collector 7 on the other side is connected to the exhaust port of the high-pressure blower 9 via a pipe. The modifier feeder 6 is located beside the modified main unit 3, and the discharge port of the modified main unit 3 is connected to the modifier inlet of the modified main unit 3. A dust collection and unloading valve 8 is connected to the bottom discharge port of the pulse dust collector 7.

[0014] The air outlet of heater 1 is connected to the raw material inlet of the modification host 3 through the material hot air conveying pipe 2. The discharge port of raw material silo 4 is connected to the end of the material hot air conveying pipe 2 near the air outlet of heater 1 through the feed and discharge valve 5.

[0015] The exhaust port of the high-pressure blower 9 is connected to an exhaust pipe 10, and a first air valve 11 is installed at the free end of the exhaust pipe 10 (i.e., the port communicating with the outside atmosphere). A return air pipe 12 is formed by a branch in the middle of the exhaust pipe 10. The air inlet of the heater 1 is connected to an air inlet pipe 13, and a second air valve 14 is installed at the free end of the air inlet pipe 13 (i.e., the port communicating with the outside atmosphere). The other end of the return air pipe 12 is connected to the middle of the air inlet pipe 13.

[0016] In this device, the high-pressure blower 9 is the core power source. When it is running, it provides the required negative pressure air force to the modified host 3 and the pulse dust collector 7 on the exhaust port side for sucking up materials. At the same time, the high-pressure blower 9 provides positive pressure air force to the return air duct 12 to transport materials to the modified host 3.

[0017] Heater 1 can be a mature hot air generating device in the existing technology, such as electric heating tube type, fin type, gas combustion type, etc. The function of heater 1 is to provide heat to the air passing through it, generate a stable hot air source, and preheat the raw materials in the process of conveying them into the improved host 3 through the material hot air conveying pipe 2.

[0018] In this invention, the main function of the first air valve 11 is to control the heat dissipation and regulate the operating temperature inside the modification device. During the modification process, properly adjusting the opening of the first air valve 11 is crucial. The optimal opening is one that ensures sufficient and stable positive pressure hot air can reliably transport the material while maintaining a reasonable temperature range inside the modification device.

[0019] The function of the second air valve 14 is as follows: During normal modification operation: The main function of the second air valve 14 is to supply fresh air. By adjusting the opening of the second air valve 14, ambient temperature air can be introduced. The purpose of supplying fresh air is twofold: firstly, to supplement the positive pressure airflow of the modification unit and maintain the stability of the material conveying power; secondly, the introduced low-temperature fresh air mixes with the high-temperature circulating air from the return air duct 12 in the air inlet duct 13, which plays a role in regulating the air temperature entering the heater 1, and together with the first air valve 11, it regulates the internal temperature of the modification unit.

[0020] During rapid cooling after modification: the function of the second air valve 14 is converted to exhaust. The opening of the second air valve 14 and the first air valve 11 is simultaneously adjusted to the maximum, and a large amount of residual hot air in the modification device is discharged through the first air valve 11 and the second air valve 14, accelerating the cooling process.

[0021] The powder modification method of this utility model, implemented using the aforementioned powder modification device, specifically includes the following steps: Start heater 1 and heat it to the set temperature required for powder modification; Turn on the high-pressure blower 9, which provides two types of power to the system at the same time: one is to provide negative pressure airflow to the modification host 3 and the dust collector 7, which is used to draw the modified material to the dust collector 7; the other is to provide positive pressure airflow through the return air duct 12, which is used to transport the raw material from the raw material silo 4 to the modification host 3. Raw materials are fed from the raw material silo 4 into the material hot air conveying pipeline 2 through the feed and discharge valve 5. The positive pressure air provided by the return air pipeline 12 and heated by the heater 1 is used to transport the raw materials to the modification host 3, while simultaneously preheating the raw materials. In the modification host 3, the modifier from the modifier feeder 6 is mixed and contacted with the preheated raw material to complete the powder modification; The modified material is transported to the dust collector 7 for gas-solid separation under the action of negative pressure wind. The separated modified product is discharged through the dust collection and unloading valve 8 at the bottom of the dust collector 7. During the modification process, by adjusting the opening of the first air valve 11 set on the exhaust pipe 10, some hot air is discharged from the system, thereby precisely controlling the operating temperature inside the modification device; at the same time, by adjusting the opening of the second air valve 14 set on the air inlet pipe 13 of the heater 1, fresh air from the outside is supplied to regulate the internal temperature of the modification device and to supplement positive pressure airflow for conveying raw materials. After modification, the opening of the first air valve 11 is adjusted to the maximum to exhaust air, and the opening of the second air valve 14 is also adjusted to the maximum. At the same time, the function of the second air valve 14 is converted to exhaust air, so that the air inlet pipe 13 where the second air valve 14 is located becomes a synchronous heat exhaust pipe, thereby accelerating the exhaust of hot air inside the modification device and achieving rapid cooling.

[0022] The specific embodiments of this utility model have been described above. However, those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principle and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A powder modification device, comprising a modifying main unit, a raw material silo, a modifier feeder, a dust collector, and a high-pressure blower, wherein the discharge port of the modifying main unit is connected to the inlet on one side of the dust collector via a pipe, and the exhaust port on the other side of the dust collector is connected to the exhaust port of the high-pressure blower via a pipe; the modifier feeder is located beside the modifying main unit, and the discharge port of the modifier feeder is connected to the modifier inlet of the modifying main unit; characterized in that: It also includes a heater, the air outlet of which is connected to the raw material inlet of the modification host through a material hot air conveying pipe; The material silo's discharge port is connected to the end of the material hot air conveying pipeline near the heater via a feed and discharge valve; The exhaust port of the high-pressure blower is connected to an exhaust pipe, the free end of the exhaust pipe is connected to a first air valve, the middle part of the exhaust pipe is branched to form a return air pipe, and the other end of the return air pipe is connected to the air inlet of the heater. The high-pressure blower provides the negative pressure required by the modification host and dust collector, and provides positive pressure to the return air duct to transport materials to the modification host.

2. The powder modification device according to claim 1, characterized in that: The heater has an air inlet connected to an air inlet pipe, and a second air valve is connected to the free end of the air inlet pipe. The other end of the return air pipe is connected to the middle of the air inlet pipe.

3. The powder modification device according to claim 1, characterized in that: The dust collector is a pulse jet dust collector.

4. The powder modification device according to claim 1, characterized in that: The dust collector is connected to a dust collection and unloading valve at its bottom outlet.

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