A low-melting substance drying system

Abstract

The utility model relates to a kind of low-melting-point substance drying systems, it includes: drying component;Air inlet component, the air inlet component includes air inlet pipe, with the nitrogen gas storage tank being communicated with the air inlet pipe, first stop valve being installed between the nitrogen gas storage tank and the air inlet pipe, with the air inlet pipe being communicated with air inlet pipe, second stop valve being installed on the air inlet pipe, with the air inlet pipe being communicated with air blower and with the heater being communicated with the air blower and with the fluidized bed dryer being communicated;Feeding component, the feeding component includes wet material storage tank, with the wet material storage tank being connected with plate-and-frame filter press, with the plate-and-frame filter press being matched with cage crusher and with the screw feeder being connected with one end of the cage crusher and being communicated with the other end of the fluidized bed dryer. It can be used for drying air-sensitive substance or air-insensitive substance, greatly improve the application range of drying system.

Description

Technical Field

[0001] This utility model pertains to chemical drying devices, specifically relating to a drying system for low-melting-point substances. Background Technology

[0002] Chinese utility model patent application number 202320711311.3 discloses a continuous drying device for low-melting-point cyclohexanedione, including a wet storage silo. A first spiral conveying pipe is connected to the lower end of the wet storage silo. A drying chamber is located at one end of the first spiral conveying pipe, and a stirring and drying device is installed on the drying chamber. A cyclone dust collector is connected to the lower end of the drying chamber, and the first spiral conveying pipe is connected to the lower end of the cyclone dust collector. A dry storage silo is located at one end of the first spiral conveying pipe. This utility model stores wet cyclohexanedione inside the wet storage silo. The first spiral conveying pipe allows the material to be evenly added into the drying chamber. The dried product is then dusted by the cyclone dust collector, then collected by a bag filter, and finally collected in the dry storage silo via the first spiral conveying pipe. This device can quickly dry and remove dust from cyclohexanedione, enabling continuous drying. However, this continuous drying device cannot be used simultaneously for substances that are sensitive to air or substances that are not sensitive to air; moreover, its simple structure leaves room for improvement in drying efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a drying system for low-melting-point substances.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a drying system for low-melting-point substances, comprising: A drying assembly, the drying assembly including at least a fluidized bed dryer, an air inlet opened at the lower part of the fluidized bed dryer, and a feeder installed in the middle part of the fluidized bed dryer; An air intake assembly includes an air intake pipe, a nitrogen storage tank connected to the air intake pipe, a first shut-off valve installed between the nitrogen storage tank and the air intake pipe, an air intake pipe connected to the air intake pipe, a second shut-off valve installed on the air intake pipe, a blower connected to the air intake pipe, and a heater connected to the blower and connected to the fluidized bed dryer. The feeding assembly includes a wet material storage tank, a plate and frame filter press connected to the wet material storage tank, a cage crusher cooperating with the plate and frame filter press, and a screw feeder connected at one end to the cage crusher and at the other end to the fluidized bed dryer.

[0005] Optimally, the air intake assembly further includes an air filter mounted on the air intake pipe, and the second shut-off valve is mounted between the air filter and the air intake pipe.

[0006] Furthermore, it also includes a thermostatic circulating pump, and the drying assembly further includes a jacket formed on the outer surface of the fluidized bed dryer, the thermostatic circulating pump being connected to the upper and lower parts of the jacket respectively.

[0007] Furthermore, the drying assembly also includes a hot air distributor installed inside the fluidized bed dryer and corresponding to the air inlet, a distribution plate installed inside the fluidized bed dryer and located above the hot air distributor, and a stirrer installed inside the fluidized bed dryer. The air inlet is connected to the heater via an air intake pipe.

[0008] Furthermore, the drying assembly also includes a temperature sensor installed inside the fluidized bed dryer, an alarm installed outside the fluidized bed dryer, and a controller installed on the outer wall of the fluidized bed dryer and connected to the temperature sensor and the alarm, respectively.

[0009] Ideally, it also includes: The separation assembly includes a cyclone separator connected in the middle to the top of the fluidized bed dryer via a pipe, an induced draft fan connected to the top of the cyclone separator, and a gas filter connected to the induced draft fan.

[0010] Furthermore, it also includes: The condensation assembly includes a condenser connected to the gas filter, a molecular sieve drying tower connected to the condenser via a condenser pipe, and a condensate receiving tank connected to the condenser pipe. The bottom of the molecular sieve drying tower is connected to the gas inlet pipe.

[0011] Furthermore, the condensation assembly also includes a control valve installed on the intake pipe and located upstream of the nitrogen storage tank, and an exhaust pipe connected to the intake pipe and located upstream of the control valve, wherein an exhaust valve is installed on the exhaust pipe.

[0012] Due to the application of the above technical solutions, this utility model has the following advantages compared with the prior art: The low melting point material drying system of this utility model, by adopting a specific structure of air inlet component, drying component, feeding component, etc., can select nitrogen or air as air inlet to heat the material, and can be used for drying materials that are sensitive to air or not sensitive to air, which greatly improves the applicability of the drying system. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the structure of the low-melting-point material drying system of this utility model. Detailed Implementation

[0014] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0015] like Figure 1 The low-melting-point material drying system shown mainly includes a matching air intake assembly 1, a drying assembly 2, and a feeding assembly 4.

[0016] The drying assembly 2 includes at least a fluidized bed dryer 21, an air inlet 20 located at the bottom of the fluidized bed dryer 21, and a feeder 29 installed in the middle of the fluidized bed dryer 21 (a portion of the dried product can be output via the feeder 29).

[0017] The intake assembly 1 mainly includes an intake pipe 10, a nitrogen storage tank 13 connected to the intake pipe 10, a first shut-off valve 15 installed between the nitrogen storage tank 13 and the intake pipe 10 (the connection between the nitrogen storage tank 13 and the intake pipe 10 adopts the existing conventional method, such as through a pipeline; specifically, one end of the nitrogen delivery pipe is connected to the nitrogen storage tank 13 and the other end is connected to the intake pipe 10, and the first shut-off valve 15 is installed on the nitrogen delivery pipe; the same applies below), an air intake pipe 14 connected to the intake pipe 10, and an air intake pipe 15 installed between the nitrogen storage tank 13 and the intake pipe 10. The air inlet pipe 14 includes a second shut-off valve 16 (thus the second shut-off valve 16 is connected in parallel with the first shut-off valve 15; the air inlet pipe 14 can be located upstream or downstream of the nitrogen storage tank 13, in this embodiment, it is located downstream; upstream and downstream are defined according to the direction of airflow), a blower 11 connected to the air inlet pipe 10, and a heater 12 connected to the blower 11 and the fluidized bed dryer 21 (the connection method here is also usually conventional, such as a conventional pipeline connection). In actual use, depending on the properties of the material, the first shut-off valve 15 or the second shut-off valve 16 can be opened to supply nitrogen or air downstream.

[0018] The feeding assembly 4 includes a wet material storage tank 41, a plate and frame filter press 42 connected to the wet material storage tank 41 (for pressing and filtering the wet material to obtain filter residue), a cage crusher 43 cooperating with the plate and frame filter press 42 (for crushing the aforementioned filter residue, and the two are connected in a conventional manner), and a screw feeder 44 connected at one end to the cage crusher 43 and at the other end to the fluidized bed dryer 21, for feeding the discharge of the cage crusher 43 into the fluidized bed dryer 21 to be heated and dried by the hot airflow.

[0019] In this embodiment, the drying assembly 2 also includes a hot air distributor 23 installed in the fluidized bed dryer 21 and corresponding to the air inlet 20, a distribution plate 24 installed in the fluidized bed dryer 21 and located above the hot air distributor 23, and an agitator 25 installed in the fluidized bed dryer 21 (the agitator 25 is installed in a conventional way, as long as it can agitate the material). The air inlet 20 is connected to the heater 12 through the air intake pipe 18, so that heated nitrogen or air is delivered into the fluidized bed dryer 21 through the air intake pipe 18 and the air inlet 20. The drying assembly 2 preferably includes a temperature sensor 27 installed inside the fluidized bed dryer 21, an alarm 28 installed outside the fluidized bed dryer 21, and a controller 26 installed on the outer wall of the fluidized bed dryer 21 and connected to the temperature sensor 27 and the alarm 28 respectively (these are all commercially available conventional devices). The temperature sensor 27 can be used to detect the temperature inside the fluidized bed dryer 21. If the temperature is too high, the controller 26 can control the alarm 28 to sound an alarm (or the alarm 28 can be directly connected to the temperature sensor 27, and the temperature sensor 27 can directly send a signal to the alarm 28).

[0020] In this embodiment, the air intake assembly 1 further includes an air filter 17 installed on the air intake pipe 14 to filter the input air and improve its quality. At this time, a second shut-off valve 16 is installed between the air filter 17 and the air intake pipe 10. In this embodiment, the low-melting-point material drying system also includes a thermostatic circulating pump 3. Thus, the drying assembly 2 also includes a jacket 22 formed on the outer surface of the fluidized bed dryer 21 (the jacket can be formed by welding or integral molding, etc., using conventional methods). The thermostatic circulating pump 3 is connected to the upper and lower parts of the jacket 22 via pipes, thereby ensuring temperature stability within the jacket 22 and improving the temperature stability within the fluidized bed dryer 21.

[0021] In this embodiment, the low-melting-point material drying system also includes a separation component 5, which includes a cyclone separator 51 (which can also output some dry product or material) connected to the top of the fluidized bed dryer 21 via a pipe (the cyclone separator 51 can also output some dry product or material), an induced draft fan 52 connected to the top of the cyclone separator 51, and a gas filter 53 connected to the induced draft fan 52 (the induced draft fan 52 is connected to the induced draft fan 52 via a pipe).

[0022] When nitrogen is used as the guiding medium, it needs to be recycled to reduce costs (of course, air can also be recycled when the guiding medium is used, but it is usually not necessary from a cost perspective). Therefore, a condensation assembly 6 is preferably provided, which includes a condenser 61 connected to the gas filter 53 (used to cool the guiding medium and precipitate the condensate therein), a molecular sieve drying tower 63 connected to the condenser 61 via a condenser pipe (used to adsorb a small amount of moisture in the guiding medium), and a condensate receiving tank 62 connected to the condenser pipe (i.e., receiving the aforementioned condensate). The bottom of the molecular sieve drying tower 63 is connected to the air inlet pipe 10, thereby realizing the circulation of the guiding medium in the entire low-melting-point material drying system. Specifically, the condensation assembly 6 also includes a control valve 64 installed on the air inlet pipe 10 and located upstream of the nitrogen storage tank 13, and an exhaust pipe 65 connected to the air inlet pipe 10 and located upstream of the control valve 64. An exhaust valve is installed on the exhaust pipe 65 (which can discharge the guiding medium; and can also relieve pressure when the system pressure is too high).

[0023] The operating steps or working principle of the above-mentioned low-melting-point substance drying system are as follows: When blower 11 is turned on, for air-sensitive substances, the gas enters heater 12 from nitrogen storage tank 13; for substances not sensitive to air, the gas enters heater 12 through air inlet pipe 14 and air filter 17. It then sequentially passes through inlet 20, hot air distributor 23, and distribution plate 24 into fluidized bed dryer 21, followed by cyclone separator 51, induced draft fan 52, gas filter 53, condenser 61, and molecular sieve drying tower 63, before being discharged through exhaust pipe 65. The nitrogen can be recycled. The condensate produced in condenser 61 enters condensate receiving tank 62.

[0024] The inlet air temperature is adjusted using controller 26 (i.e., controller 26 can be connected to heater 12, enabling controller 26 to control heater 12 and thus adjust the inlet air temperature); simultaneously, the constant temperature circulating pump 3 is turned on to control the jacket 22 temperature to be 5-7℃ lower than the inlet air temperature to prevent material from sticking to the wall. After the temperature inside the fluidized bed dryer 21 reaches the set value, feeding begins. Wet material is fed from wet material storage tank 41 through plate and frame filter press 42 and cage crusher 43, and then fed by screw feeder 44. Agitator 25 is turned on to begin drying. After drying, the dried product is discharged through discharge device 29 and cyclone separator 51.

[0025] During the drying process, temperature sensor 27 detects the internal temperature. If the internal temperature is too high, alarm 28 will sound an alarm.

[0026] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A drying system for low-melting-point substances, characterized in that it include: The drying assembly (2) includes at least a fluidized bed dryer (21), an air inlet (20) opened at the lower part of the fluidized bed dryer (21), and a feeder (29) installed in the middle of the fluidized bed dryer (21). An air intake assembly (1) includes an air intake pipe (10), a nitrogen storage tank (13) connected to the air intake pipe (10), a first shut-off valve (15) installed between the nitrogen storage tank (13) and the air intake pipe (10), an air intake pipe (14) connected to the air intake pipe (10), a second shut-off valve (16) installed on the air intake pipe (14), a blower (11) connected to the air intake pipe (10), and a heater (12) connected to the blower (11) and connected to the fluidized bed dryer (21). The feeding assembly (4) includes a wet material storage tank (41), a plate and frame filter press (42) connected to the wet material storage tank (41), a cage crusher (43) cooperating with the plate and frame filter press (42), and a screw feeder (44) connected at one end to the cage crusher (43) and at the other end to the fluidized bed dryer (21).

2. The low-melting-point substance drying system according to claim 1, characterized in that: The air intake assembly (1) further includes an air filter (17) installed on the air intake pipe (14), and the second shut-off valve (16) is installed between the air filter (17) and the air intake pipe (10).

3. The low-melting-point substance drying system according to claim 1 or 2, characterized in that: It also includes a thermostatic circulating pump (3), and the drying assembly (2) also includes a jacket (22) formed on the outer surface of the fluidized bed dryer (21), wherein the thermostatic circulating pump (3) is connected to the upper and lower parts of the jacket (22) respectively.

4. The low-melting-point substance drying system according to claim 3, characterized in that: The drying assembly (2) further includes a hot air distributor (23) installed in the fluidized bed dryer (21) and corresponding to the air inlet (20), a distribution plate (24) installed in the fluidized bed dryer (21) and located above the hot air distributor (23), and a stirrer (25) installed in the fluidized bed dryer (21). The air inlet (20) is connected to the heater (12) through an air intake pipe (18).

5. The low-melting-point substance drying system according to claim 4, characterized in that: The drying assembly (2) also includes a temperature sensor (27) installed inside the fluidized bed dryer (21), an alarm (28) installed outside the fluidized bed dryer (21), and a controller (26) installed on the outer wall of the fluidized bed dryer (21) and connected to the temperature sensor (27) and the alarm (28) respectively.

6. The low-melting-point substance drying system according to claim 1, characterized in that, It also includes: The separation assembly (5) includes a cyclone separator (51) connected in the middle to the top of the fluidized bed dryer (21) via a pipe, an induced draft fan (52) connected to the top of the cyclone separator (51), and a gas filter (53) connected to the induced draft fan (52).

7. The low-melting-point substance drying system according to claim 6, characterized in that, It also includes: The condensing assembly (6) includes a condenser (61) connected to the gas filter (53), a molecular sieve drying tower (63) connected to the condenser (61) via a condensing pipe, and a condensate receiving tank (62) connected to the condensing pipe. The bottom of the molecular sieve drying tower (63) is connected to the air inlet pipe (10).

8. The low-melting-point substance drying system according to claim 7, characterized in that: The condensation assembly (6) also includes a control valve (64) installed on the air inlet pipe (10) and located upstream of the nitrogen storage tank (13) and an exhaust pipe (65) connected to the air inlet pipe (10) and located upstream of the control valve (64), with an exhaust valve installed on the exhaust pipe (65).

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