Closed air circulation cooling system for powdered ink processing

Abstract

The utility model discloses a closed air circulation cooling system for powdered ink processing. The closed air circulation cooling system comprises a compression refrigerating unit, a radiator, a gas-liquid heat exchanger, a circulation pressure pump, a mixer, a mechanical mill and a solid-gas separator, the compression refrigerating unit provides a refrigerant for circulation for the gas-liquid heat exchanger; a gas outlet of the gas-liquid heat exchanger is sequentially connected with the circulating pressure pump, the mixer and an inlet of the mechanical mill through a pipeline; an outlet of the mechanical mill is connected with the solid-gas separator, an exhaust port of the solid-gas separator is connected to an inlet of the radiator, and an outlet of the radiator is connected to a gas inlet of the gas-liquid heat exchanger. The air flow for cooling the mechanical mill circulates in a closed manner, so that the air can be kept dry, the frosting of the gas-liquid heat exchanger can be effectively reduced, the air flow cooling capacity can be improved due to no frosting, the energy consumption is reduced, the effect is most obvious especially when the air humidity is higher, and the service life of the air-liquid heat exchanger is prolonged. And more than 10% of energy consumption can be saved.

Description

Technical Field

[0001] The utility model relates to an air cooling system, in particular to a closed air circulation cooling system for toner processing. Background Art

[0002] Toner is the carbon powder used in printers. Its particle size is required to reach the micron level, so it is generally processed by air flow grinding or mechanical grinding. During the processing, the temperature will increase due to mutual friction. However, if the outlet temperature is higher than 30 degrees, the toner will denature.

[0003] When the toner is being ground, in order to avoid temperature rise and denaturation, very low-temperature air is used to carry the toner into the grinding equipment. The air is cooled by the gas-liquid heat exchanger, and the refrigerant temperature of the gas-liquid heat exchanger is as low as -15℃ to -20℃. Since the air flow inhaled from the outside contains water vapor, it will cause frost inside the gas-liquid heat exchanger after a long working time, especially in weather with high air humidity. The water vapor in the inhaled air will quickly frost inside the gas-liquid heat exchanger at low temperatures. After frosting, not only the air resistance increases, the fan needs to consume more power, but also the frost covers the heat exchange surface, the heat exchange rate decreases, which will lead to a decrease in the cooling effect of the air, thereby consuming more energy for cooling. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a closed air circulation cooling system for toner processing, so as to solve the technical problems in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A closed air circulation cooling system for toner processing comprises a compression refrigeration unit, a radiator, a gas-liquid heat exchanger, a circulation booster pump, a mixer, a mechanical mill and a solid-gas separator; the compression refrigeration unit provides circulating refrigerant for the gas-liquid heat exchanger; the air outlet of the gas-liquid heat exchanger is connected to the circulation booster pump, the mixer and the inlet of the mechanical mill in sequence through a pipeline; the outlet of the mechanical mill is connected to the solid-gas separator, the exhaust port of the solid-gas separator is connected to the inlet of the radiator, and the outlet of the radiator is connected to the air inlet of the gas-liquid heat exchanger.

[0007] Furthermore, the mixer is a Venturi mixer, the feeding pipe of which is connected to the outlet of the screw feeder, and the inlet of the screw feeder is connected to the outlet of the storage tank.

[0008] Furthermore, the solid-gas separator adopts a cyclone dust collector.

[0009] Furthermore, the gas-liquid heat exchanger adopts a shell-and-tube heat exchange structure.

[0010] Furthermore, the gas-liquid heat exchanger includes a heat exchange jacket, an air inlet hood and an exhaust hood, wherein the air inlet hood and the exhaust hood are installed at both ends of the heat exchange jacket, and the air inlet hood and the exhaust hood are connected through a plurality of tubes passing through the inside of the heat exchange jacket; the two ends of the heat exchange jacket are respectively connected to the liquid inlet pipe and the liquid discharge pipe.

[0011] The advantages of the utility model are:

[0012] The airflow used for cooling the mechanical mill in the utility model is a closed cycle, and no external air is introduced, so the air can be kept dry, which can effectively reduce the frosting of the gas-liquid heat exchanger, thereby eliminating the need to shut down for defrosting and increasing production efficiency. In addition, the lack of frosting can increase the cooling capacity of the airflow, thereby reducing energy consumption. The effect is most obvious when the air humidity is high, and more than 10% of energy consumption can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a cross-sectional view of the gas-liquid heat exchanger.

[0015] In the figure, 1-gas-liquid heat exchanger, 11-air inlet hood, 12-heat exchange jacket, 121-liquid inlet pipe, 122-liquid discharge pipe, 13-exhaust hood, 2-compression refrigeration unit, 3-circulation booster pump, 4-mixer, 41-screw feeder, 42-storage tank, 5-mechanical mill, 6-solid-gas separator, 7-radiator. DETAILED DESCRIPTION

[0016] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0017] As shown in the figure:

[0018] A closed air circulation cooling system for toner processing, comprising a compression refrigeration unit 2, a radiator 7, a gas-liquid heat exchanger 1, a circulation booster pump 3, a mixer, a mechanical mill 5 and a solid-gas separator 6; the compression refrigeration unit 2 provides a circulating refrigerant for the gas-liquid heat exchanger 1; the air outlet of the gas-liquid heat exchanger 1 is connected to the circulation booster pump 3, the mixer 4 and the inlet of the mechanical mill 5 in sequence through a pipeline; the outlet of the mechanical mill 5 is connected to the solid-gas separator 6, the exhaust port of the solid-gas separator 6 is connected to the inlet of the radiator 7, and the outlet of the radiator 7 is connected to the air inlet of the gas-liquid heat exchanger 1.

[0019] Working principle: The airflow exchanges heat with the refrigerant in the gas-liquid heat exchanger 1, reducing the temperature to -15°C to -20°C, and then enters the mixer under the action of circulating pressurization. The main function of the mixer is to mix the airflow with the toner to be processed, and use the airflow to carry the toner into the mechanical mill 5. The low-temperature airflow can slow down the temperature rise of the toner in the mechanical mill 5, and control its outlet temperature at around 30°C. Then, the toner is separated from the airflow through the solid-gas separator 6 (it is recommended to use a cyclone dust collector, which can have a relatively small pressure drop, thereby reducing the energy consumption of the circulating pressurizing pump 3). The temperature of the separated airflow is higher than the room temperature, and it is dissipated through the radiator 7 to reduce the temperature, and then circulated into the gas-liquid heat exchanger 1 for cooling.

[0020] In the utility model, the airflow used for cooling the mechanical mill 5 is a closed cycle, and no external air is introduced, so that the air can be kept dry, which can effectively reduce the frosting of the gas-liquid heat exchanger 1, thereby eliminating the need to shut down for defrosting and increasing production efficiency. In addition, the lack of frosting can increase the cooling capacity of the airflow, thereby reducing energy consumption. The effect is most obvious when the air humidity is high, and more than 10% of energy consumption can be saved.

[0021] As an optimization solution, the mixer adopts a Venturi mixer (a mixer based on the Venturi effect, existing technology), whose feeding pipe is connected to the outlet of the screw feeder 41, and the inlet of the screw feeder 41 is connected to the outlet of the storage tank 42. The toner quantitatively fed by the screw feeder 41 is mixed with the low-temperature airflow through the Venturi mixer.

[0022] The gas-liquid heat exchanger 1 can adopt a shell-and-tube heat exchange structure. Specifically, the liquid heat exchanger includes a heat exchange jacket 12, an air inlet hood 11 and an exhaust hood 13. The air inlet hood 11 and the exhaust hood 13 are installed at both ends of the heat exchange jacket 12. The air inlet hood 11 and the exhaust hood 13 are connected through a number of shells and tubes passing through the inside of the heat exchange jacket 12. The two ends of the heat exchange jacket 12 are respectively connected to a liquid inlet pipe 121 and a liquid discharge pipe 122.

[0023] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A closed air circulation cooling system for toner processing, characterized in that: It includes a compression refrigeration unit, a radiator, a gas-liquid heat exchanger, a circulating pressure pump, a mixer, a mechanical mill and a solid-gas separator; the compression refrigeration unit provides circulating refrigerant for the gas-liquid heat exchanger; the air outlet of the gas-liquid heat exchanger is connected to the circulating pressure pump, the mixer and the inlet of the mechanical mill in sequence through a pipeline; the outlet of the mechanical mill is connected to the solid-gas separator, the exhaust port of the solid-gas separator is connected to the inlet of the radiator, and the outlet of the radiator is connected to the air inlet of the gas-liquid heat exchanger.

2. The closed air circulation cooling system for toner processing according to claim 1, characterized in that: The mixer is a Venturi mixer, a feeding pipe of which is connected to the outlet of a screw feeder, and an inlet of the screw feeder is connected to the outlet of a storage tank.

3. The closed air circulation cooling system for toner processing according to claim 2, characterized in that: The solid-gas separator adopts a cyclone dust collector.

4. A closed air circulation cooling system for toner processing according to any one of claims 1 to 3, characterized in that: The gas-liquid heat exchanger adopts a shell-and-tube heat exchange structure.

5. The closed air circulation cooling system for toner processing according to claim 4, characterized in that: The gas-liquid heat exchanger includes a heat exchange jacket, an air inlet hood and an exhaust hood. The air inlet hood and the exhaust hood are installed at both ends of the heat exchange jacket. The air inlet hood and the exhaust hood are connected through a plurality of tubes passing through the inside of the heat exchange jacket. The two ends of the heat exchange jacket are respectively connected to a liquid inlet pipe and a liquid discharge pipe.

Images