High-performance jet flash drying system

Abstract

A high-performance jet flash drying system comprises a generator and a condenser, an outlet of the generator is communicated with an inlet of the condenser through a first pipeline, the inlet of the generator is communicated with an outlet of the condenser through a second pipeline, and the high-performance jet flash drying system further comprises a flash evaporator; an ejector is further arranged on the first pipeline, and a first outlet in the upper end of the flash evaporator is communicated with an injection flow inlet of the ejector; a tee joint is further arranged on the second pipeline, and a second inlet in the lower end of the flash evaporator is communicated with the tee joint through a third pipeline. A jet type refrigerating system is coupled with a flash evaporator to form a jet flash drying system, so that the drying efficiency is greatly improved. And the evaporator and the condenser are relatively independent and separated, so that the loss of expansion work caused by a throttle valve is avoided, and the heat loss is lower. A coaxial double-impeller air compressor is installed in the flash evaporator, and the flash evaporation rate and the refrigeration effect of the system are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flash drying and jet refrigeration systems, in particular to a high-performance jet flash drying system. Background Art

[0002] Drying technology is a critical process designed to remove moisture from wet materials until they reach a desired dryness. Heat pump drying technology, in particular, has gained widespread recognition and application across numerous industries due to its high efficiency, energy-saving, and environmentally friendly characteristics. Currently, most common heat pump drying systems utilize throttle valves to maintain phase transitions in the refrigerant and achieve the drying process. However, the presence of throttle valves can negatively impact the compressor's expansion work, resulting in significant heat loss. Utility Model Content

[0003] In order to solve the technical problem in the prior art that the expansion work of the compressor is easily lost in the existing heat pump drying system, the utility model provides a high-performance jet flash drying system.

[0004] The technical solution of this utility model is as follows:

[0005] A high-performance jet flash drying system includes a generator and a condenser. The generator's outlet is connected to the condenser's inlet via a first pipeline, and the generator's inlet is connected to the condenser's outlet via a second pipeline. The system also includes a flash evaporator. The first pipeline is also provided with an ejector, and the first outlet at the flash evaporator's upper end is connected to the ejector's injection flow inlet. The second pipeline is also provided with a tee, and the second inlet at the flash evaporator's lower end is connected to the tee via a third pipeline. Using an ejector instead of a compressor is less prone to damage, requires less maintenance, operates stably, and is less susceptible to vibration. Furthermore, by coupling a jet refrigeration system with a flash evaporator, the resulting jet flash drying system can significantly improve drying efficiency.

[0006] Furthermore, the flash evaporator includes an evaporator; the upper and lower ends of the flash evaporator are respectively provided with a first inlet and a second outlet, the evaporator inlet is connected to the second outlet, and the outlet is connected to the first inlet. The evaporator and condenser are relatively independent and separated, thereby avoiding the loss of expansion work caused by the throttle valve and reducing heat loss.

[0007] The third pipeline is also provided with a solenoid valve. As the refrigerant in the flash evaporator continues to evaporate and enters the ejector, the refrigerant content in the flash evaporator continues to decrease. At this time, the solenoid valve is opened to realize the refrigerant supply from the condenser to the flash evaporator.

[0008] The flash evaporator consists of a main tank housing a compressor. The compressor comprises two coaxial impellers, one above the other, positioned within the refrigerant liquid. The flash evaporator is equipped with a coaxial dual-impeller compressor. The lower impeller is driven by the potential energy of the liquid refrigerant within the flash evaporator, which in turn drives the upper impeller, significantly improving the flash evaporation rate and the system's cooling efficiency.

[0009] Further preferably, an atomizing nozzle is provided above the interior of the main body tank, and the atomizing nozzle disperses the refrigerant liquid into fine droplets by reducing the droplet diameter, thereby accelerating the evaporation rate of the refrigerant.

[0010] In a preferred embodiment, the flash evaporator further comprises a third outlet at its lower end, which is connected to the nozzle inlet via a fourth pipeline. A second booster pump is also provided on the fourth pipeline. The unevaporated refrigerant liquid in the flash evaporator is pressurized by the second booster pump and enters the nozzle, where it is rapidly evaporated and ejected into the ejector.

[0011] The aforementioned high-performance jet flash drying system further includes a fan and a material zone. The fan is configured to blow air toward the connection between the condenser and the evaporator. The material zone is located between the condenser and the evaporator. During operation, heat released by the condenser is transported to the material zone via the fan. This heat is exchanged with the material, causing moisture in the material to absorb heat and evaporate into water vapor. Driven by the fan, the water vapor-laden air is transported to the evaporator, where it condenses into water upon encountering cold, and is then discharged from the system.

[0012] As a preferred embodiment, a high-performance jet flash drying system also includes a closed air duct, and the condenser, evaporator and fan are all arranged in the air duct. The system adopts a closed air duct system, which can improve the material drying rate.

[0013] Through the above design, the beneficial effects of the high-performance jet flash drying system of the utility model are:

[0014] (1) The evaporator and condenser are relatively independent and separated, which avoids the loss of expansion work caused by the throttle valve and reduces heat loss.

[0015] (2) Using ejectors instead of compressors is not easy to damage, has low maintenance costs, operates stably, and is not afraid of vibration. Moreover, by coupling the ejector refrigeration system with the flash evaporator, the resulting ejector flash drying system can significantly improve drying efficiency.

[0016] (3) A coaxial double-impeller compressor is installed in the flash evaporator. The lower impeller is driven by the potential energy of the liquid refrigerant in the flash evaporator, which in turn drives the upper impeller to rotate, greatly improving the flash evaporation rate and the cooling effect of the system. At the same time, the system adopts a closed air duct system, which can improve the material drying rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the attached figure:

[0018] Figure 1 This is a schematic diagram of a high-performance jet flash drying system of the utility model;

[0019] Figure 2 Schematic diagram of the interior of the flash evaporator in the embodiment;

[0020] The components represented by the reference numerals in the figure are:

[0021] 1. Generator; 2. First booster pump; 3. Tee; 4. Condenser; 5. Ejector; 6. Flash evaporator; 61. First outlet; 62. Second outlet; 63. Third outlet; 64. First inlet; 65. Second inlet; 7. Nozzle; 8. Compressor; 9. Second booster pump; 10. Solenoid valve; 11. Evaporator; 12. Fan; 13. Air duct. DETAILED DESCRIPTION

[0022] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0023] Example

[0024] Combine Figure 1 and Figure 2 This embodiment improves a high-performance jet flash drying system, including a generator 1 and a condenser 4. The generator 1 includes a tank shell, and the upper and lower ends of the shell are respectively provided with openings that can be connected to a high-temperature heat source, so as to exchange heat between the refrigerant inside the generator 1 and the high-temperature heat source. An inlet and an outlet are also provided on the side wall of the generator 1. The steam outlet of the generator 1 is connected to the inlet of the condenser 4 through a first pipeline. An ejector 5 is also provided on the first pipeline. The main inlet of the ejector 5 is connected to the refrigerant outlet of the generator 1. A high-performance jet flash drying system also includes a flash evaporator 6. The first outlet 61 at the upper end of the flash evaporator 6 is connected to the induced flow inlet of the ejector 5; the outlet of the ejector 5 is connected to the inlet of the condenser 4.

[0025] The flash evaporator 6 further includes an evaporator 11. The flash evaporator 6 is provided with a first inlet 64 and a second outlet 62 at its upper and lower ends, respectively. The inlet of the evaporator 11 is connected to the second outlet 62, and the outlet is connected to the first inlet 64. The evaporator 11 and the condenser 4 are relatively independent and separate, thus avoiding the loss of expansion work caused by the throttle valve and reducing heat loss.

[0026] In this embodiment, the refrigerant inlet of the generator 1 is connected to the outlet of the condenser 4 through a second pipeline. A tee 3 is also provided on the second pipeline near the outlet of the condenser 4. A first booster pump 2 is also provided on the second pipeline. The first booster pump 2 is located between the tee 3 and the generator 1. The second inlet 65 at the lower end of the flash evaporator 6 is connected to the tee 3 through a third pipeline.

[0027] In a specific implementation, a solenoid valve 10 is further provided on the third pipeline. As the refrigerant inside the flash evaporator 6 continues to evaporate and enters the ejector 5, the refrigerant content inside the flash evaporator 6 continues to decrease. At this time, the solenoid valve 10 is opened to realize the refrigerant supply from the condenser 4 to the flash evaporator 6, thereby ensuring the continuous operation of the system.

[0028] The outlet of the condenser 4, the second inlet 65 of the flash evaporator 6 and the refrigerant inlet of the generator 1 are all connected to the tee 3. The function of the tee 3 is to allow the refrigerant liquid coming out of the condenser 4 to flow back into the generator 1 through the pressurization of the first booster pump 2. Another function is to complete the refrigerant replenishment in the flash evaporator 6 when the solenoid valve 10 is opened.

[0029] Flash evaporator 6 comprises a main tank housing a compressor 8. Compressor 8 includes two coaxial impellers, one above the other, positioned within the refrigerant liquid. The coaxial dual-impeller compressor 8 is installed within flash evaporator 6. The lower impeller is driven by the potential energy of the liquid refrigerant within flash evaporator 6, which in turn drives the upper impeller, significantly improving the flash evaporation rate and the system's cooling efficiency.

[0030] Further preferably, an atomizing nozzle 7 is further provided above the interior of the main body tank. The atomizing nozzle 7 disperses the refrigerant liquid into fine droplets by reducing the droplet diameter, thereby accelerating the evaporation rate of the refrigerant.

[0031] As a preferred embodiment, the flash evaporator 6 further has a third outlet 63 at its lower end, which is connected to the inlet of the nozzle 7 via a fourth pipeline. A second booster pump 9 is also provided on the fourth pipeline. The unevaporated portion of the refrigerant liquid in the flash evaporator 6 can be pressurized by the second booster pump 9 and enter the nozzle 7, where it is rapidly evaporated and ejected into the ejector 5.

[0032] The aforementioned high-performance jet flash drying system further includes a fan 12 and a material zone. The fan 12 is configured to blow air toward the connection between the condenser 4 and the evaporator 11. The material zone is located between the condenser 4 and the evaporator 11. During operation, heat released by the condenser 4 is transported to the material zone via the fan 12, thereby drying the material. This heat is exchanged with the material, causing the moisture in the material to absorb heat and evaporate into water vapor. Driven by the fan 12, the water vapor-laden air is transported to the evaporator 11, where it condenses into water upon encountering cold, and is subsequently discharged from the system.

[0033] As a preferred embodiment, the high-performance jet flash drying system further comprises a closed air duct 13, and the condenser 4, the evaporator 11 and the fan 12 are arranged in the air duct 13. The closed air duct 13 system can improve the drying rate of the material.

[0034] In a specific embodiment, a water pan is arranged below the evaporator 11, and a water pipe is connected to the water pan through a hole arranged below the water pan. A hole matching the water pipe is arranged on the air duct 13, and the condensate water at the evaporator 11 is discharged through the water pipe. A sealing material is arranged between the hole and the water pipe to ensure the air tightness of the air duct 13.

[0035] The high-temperature and high-pressure steam from the generator 1 enters the ejector 5 to generate an entraining effect, thereby forming a low-pressure area in the ejector 5. The low-pressure area in the ejector 5 entrains the low-temperature refrigerant steam from the flash evaporator 6. In the ejector 5, the high-temperature and high-pressure refrigerant steam from the generator 1 mixes with the low-temperature and low-pressure refrigerant steam from the flash evaporator 6 to form medium-temperature and medium-pressure refrigerant steam, which enters the condenser 4. The medium-temperature and medium-pressure refrigerant steam is condensed into liquid in the condenser 4. Part of the liquid passes through the three-way valve 3 and returns to the generator 1 through the first booster pump 2 to exchange heat with the high-temperature heat source and become high-temperature and high-pressure refrigerant steam. When the refrigerant in the flash evaporator 6 is insufficient, the other part enters the flash evaporator 6 through the electromagnetic valve 10 to supplement the refrigerant. When the refrigerant in the flash evaporator 6 reaches the minimum liquid level, the electromagnetic valve 10 opens to start the supplement. When the refrigerant in the flash evaporator 6 reaches the maximum liquid level, the electromagnetic valve 10 closes to stop the supplement.

[0036] In the flash evaporator 6, the rapid decrease in the pressure in the flash evaporator causes the saturation temperature of the refrigerant liquid to decrease, so that the liquid in the flash evaporator can rapidly evaporate into gas and absorb the temperature of the unevaporated liquid. The generated refrigerant steam is sucked into the ejector 5 for mixing, and the unevaporated refrigerant liquid is cooled. Part of the cooled liquid is pressurized by the second booster pump 9 and enters the nozzle 7, which is rapidly entrained into the ejector 5 by the pressure compressor 8 for mixing. The other part of the cooled liquid enters the evaporator 11, absorbs heat, becomes refrigerant steam, and returns to the flash evaporator 6.

[0037] The evaporator 11 and the condenser 4 of the high-performance jet flash evaporation drying system are relatively independent and separated, the loss of expansion work caused by a throttle valve is avoided, heat loss is lower, a jet ejector is used instead of a compressor, the jet ejector is not easy to be damaged, maintenance cost is less, operation is stable, vibration is not feared, the jet flash evaporation drying system formed by coupling the jet refrigeration system and the flash evaporator 6 can greatly improve drying efficiency, the coaxial double-impeller air compressor 8 is installed in the flash evaporator 6, the lower impeller is driven to rotate the upper impeller by the potential energy of the liquid refrigerant in the flash evaporator 6, the flash evaporation rate and the refrigeration effect of the system are greatly improved, meanwhile, the closed air duct 13 system is adopted, and the material drying rate can be improved.

Claims

1. A high-performance jet flash drying system, comprising a generator (1) and a condenser (4), wherein the outlet of the generator (1) is connected to the inlet of the condenser through a first pipeline, and the inlet is connected to the outlet of the condenser through a second pipeline, characterized in that: Also included is a flash evaporator (6); An ejector (5) is also provided on the first pipeline, and a first outlet (61) at the upper end of the flash evaporator (6) is connected to the ejector inlet of the ejector (5); A tee (3) is also provided on the second pipeline, and the second inlet (65) at the lower end of the flash evaporator (6) is connected to the tee (3) through the third pipeline.

2. A high performance jet flash drying system according to claim 1, characterized in that: Also included is an evaporator (11); The flash evaporator (6) is further provided with a first inlet (64) and a second outlet (62) at the upper and lower ends, respectively. The inlet of the evaporator (11) is communicated with the second outlet (62), and the outlet is communicated with the first inlet (64).

3. A high performance jet flash drying system according to claim 1, characterized in that: The third pipeline is also provided with a solenoid valve (10).

4. A high performance jet flash drying system according to claim 1, characterized in that: The flash evaporator (6) comprises a main body tank, in which a compressor (8) is arranged. The compressor (8) comprises two coaxial impellers arranged one above the other, and the two impellers are respectively located inside and outside the refrigerant liquid.

5. A high performance jet flash drying system according to claim 4, characterized in that: An atomizing nozzle (7) is also provided above the interior of the main body tank.

6. A high performance jet flash drying system according to claim 3, characterized in that: The lower end of the flash evaporator (6) is further provided with a third outlet (63), and the third outlet (63) is communicated with the inlet of the nozzle (7) through a fourth pipeline.

7. A high performance jet flash drying system according to claim 2, characterized in that: It also includes a fan (12) and a material area, wherein the fan (12) is configured to blow air toward the connection direction of the condenser (4) and the evaporator (11), and the material area is located between the condenser (4) and the evaporator (11).

8. A high performance jet flash drying system according to claim 7, characterized in that: It also includes a closed air duct (13), in which the condenser (4), the evaporator (11) and the fan (12) are all arranged.

Images