KR20220096932A - Dehumidifying cyclone dryer that combines dust removal and dehumidification - Google Patents

Abstract

The present invention relates to a dehumidifying cyclone having dust removal and dehumidification functions combined in a plastic dryer. Since the two functions are combined into one, units except for a hopper are smaller in size than existing products, the dehumidifying cyclone is easy to install and is advantageous to secure an installation space. During dust removal of the dehumidifying cyclone, a dust collection container (23) separated from a hopper (10) and a frame case can be separately treated, thereby preventing existing contamination of other modules during dust removal, and treatment of condensate is easy and isolated from the outside so as to prevent contamination or failure of other modules. For the dehumidification function, a freezer excellent in maintenance is used instead of the existing cooling method, thereby reducing failure and improving the performance.

Description

Dehumidifying cyclone dryer that combines dust removal and dehumidification}

The present invention relates to a plastic dehumidifier that improves the efficiency and performance of the dehumidifier by combining a dust removal function and a dehumidifier that removes moisture in the air in drying raw materials essential for removing defects in the molding of industrial plastic products.

The technology to remove and separate dust in the air can be divided into separation by gravity in the chamber, separation by cyclone shape, and separation method using a filter. applied. Currently, the cyclone-shaped method and the filter-based method are mainly used, but the cyclone method has low efficiency, and the filter-based method requires attention to maintenance.

The technology to remove moisture in the air can be largely divided into cooling, compression, absorption, and adsorption methods. Currently, the adsorption method using a desiccant is mainly used. The present invention applies a cooling method. When moisture from plastic passes through a filter and comes into contact with a cold object, condensation occurs, and the moisture in the air changes to the form of water, and the moisture in the air disappears and becomes dry air. Dry air is heated and supplied to the plastic drying machine.

Prior Patent No. 10-2011-0086734 In the plastic scraper mixed dust removal device, a cyclone-shaped device and a filter are attached to the inside of the dust generated while pulverizing the plastic molded product to prevent the dust from escaping to the outside. Prior Patent No. 10-2007-0096343 A device for removing moisture from plastic raw materials using a condensation phenomenon by a thermoelectric element or a heat medium removes moisture from plastics after passing through a dust removal filter and then an air cooler. method is patented.

David Mills, Penumatic conveying design guide 2nd edition, ISBN 9780750654715, Butterworth-Heinemann, 2003, p143-146 The dust removal device using a cyclone already exists in many documents, and its shape and size have been theoretically established. In actual application, rather than theoretically, it is produced by changing it according to the production or conditions.

The dust removal function currently used applies the dust removal method using the cyclone type dust removal and filter. In the case of a general dryer (hopper dryer), dust is removed in the form of a cyclone for the purpose of blocking dust or contaminants. Since the capacity of the blower and the size of the product do not vary, one blower model is applied to 2-3 types of dryer models. Therefore, there is a case where the dust is discharged to the outside of the cyclone. The dehumidifier has a closed circulation structure. A sealed filter case is inserted into the panel or product frame. Cleaning and replacement are required at regular intervals to maintain performance. When cleaning the filter, dust may fall into the panel or frame and contaminate other devices. It is a structure in which the size of the device increases because space must be secured with other modules.

Prior Patent No. 10-2007-0096343 In the case of a device for removing moisture from plastic raw materials using condensation by a thermoelectric element or a heat medium (dehumidifier), the dehumidifying part is close to the electric panel and several devices are concentrated in one place. Leakage may occur due to pressure change in the condensate collecting tank, and when high pressure pneumatic pressure is used for discharge, water leakage or clogging may occur in the water collecting tank or piping connection. As the condensate storage or discharge device is located inside the panel, it may enter the electrical devices of the filter, air circulation module (blower), and heating module (electric heater) and cause a malfunction. In the case of the prior patent, the temperature change of the thermoelectric element occurs periodically and cooling water is used, so management is required due to the contamination of the cooling water and the generation of scale in the pipe.

The present invention can improve the space utilization, maintenance, and performance of the device by combining the dust removal function and the dehumidifying function in a plastic dryer.

The dust removal efficiency of the cyclone type dust removal 20 is determined according to the speed of the air entering the cyclone. By adjusting the size of the inlet during manufacturing, it is possible to increase the dust removal performance by manufacturing a cyclone suitable for the capacity of the blower.

In the dust removal method of the cyclone type, the dust mainly falls on the bottom 23 of the cyclone, and the dust removal by the filter must be managed at a certain period. In the present invention, by mixing these two methods, the efficiency and lifespan can be increased and longer by applying the first cyclone method and the semi-permanent stainless mesh network filter 25 having a second lifespan.

In the process of separating the dust inside the cyclone, condensed water occurs due to condensation in the internal pipe 34, which is the evaporation part of the dehumidifying device for moisture in the air. .

The dehumidification function circulates a medium with a low temperature inside the cyclone, and condensation occurs on the outer surface of the tube through which the medium flows. The cooling water used in the factory can be used for circulation of the medium with a low temperature, but installation work and maintenance costs can be reduced by using a refrigeration system.

The cyclone performs dust removal and dehumidification functions at the same time, and the condensed water resulting from condensation during dehumidification is collected at the bottom of the cyclone. Although the cyclone is connected to the hopper, the body is separated from the hopper, so it is easy to discharge dust or condensate.

The dehumidification module 30, the air circulation module 40, and the heating module 50 are inserted into one frame case and fixed to the outside of the hopper. However, since the evaporator 34 of the dust removal module and the dehumidification module applied to the present invention is connected only by a pipe and is separated from the outside, it is possible to easily remove dust or condensed water. The dust does not contaminate other modules and condensate does not cause other modules to fail.

The present invention can reduce the installation space by combining a dust removal function and a dehumidifying function in a plastic dryer. The dehumidification cyclone dryer consists of a hopper, a simplified module and a dehumidification cyclone. Since the dehumidifying module 30, which is a refrigeration device, is used, a cooling water line is not required, and the unit except for the hopper is smaller in size than the existing product, so it is easy to install and is advantageous in securing an installation space.

When removing dust, only the dust collector 23 separated from the hopper 10 and the frame case can be separated and processed. Contamination of other modules can be prevented when the existing dust is removed. Condensate treatment is easy and it is separated from the outside to prevent contamination or failure of other modules.

Dust is scattered outside the cyclone, and the product of the present invention can reduce scattering by meeting condensed water and dust and increasing its weight and dropping it into the dust container.

By not using the cooling water required for the existing dehumidifier, it is effective for maintenance and management as it can fundamentally block the cost of use and defects due to contamination or scale inside the pipe.

Figure 1 is an overall flow chart of the dryer, Figure 2 is a diagram showing the flow of the dust removal module and the dehumidification module.
In the hopper 10 in which raw materials are stored and dried, air having a temperature suitable for the drying temperature of the plastic source is circulated. Moisture evaporated from the plastic is contained in the air column and discharged from the hopper 10, and enters through the cyclone inlet 21 where the dust removal module 20 and the dehumidification module 30 are combined, to the outside of the cyclone body 22. While rotating, the dust is accumulated in the dust collector 23 while rotating by centrifugal force. While rotating in the body, the air enters the inner separation tube 24 and rises upward. In the case of fine dust, it comes up to the internal separation pipe 24, and it meets the fine mesh filter at 25 on the secondary insertion flange and is secondary separated. The secondary filtered air is sucked in by the ring blower or blower, which is the air circulation module 40, through the outlet 26, pressurized, enters the heater, which is the heating module 50, and is heated to the previous temperature to the hopper 10. enter and cycle
The dehumidification module 30 is a general refrigeration system. In the refrigerating system, refrigerant is circulated through a compressor 31 , a condenser 32 , an expander 33 , and an evaporator 34 . Since the evaporator 34 is a tube through which the cold refrigerant circulates, the surface thereof remains cold. Condensation occurs in the evaporator, and the moisture evaporated from the plastic is changed to the form of water. The generated condensate is collected in the water collecting tank (35).

Prior Patent No. 10-2007-0096343 It is a representative diagram of an apparatus for removing moisture from plastic raw materials using a condensation phenomenon by a thermoelectric element or a heating medium.

It is the flow chart of the dryer of the current plastic raw material. Because the dust contained in the plastic comes out of the hopper under the pressure of the blower, it undergoes a filtering process. Otherwise, dust accumulates in the cooler 60 or the condensing means 50 to deteriorate the performance and cause a malfunction.

The present invention is a dehumidifier in which a filter and a part having a dehumidifying function are integrated and an air cooler is removed.

The air circulation line is shortened and the configuration is simplified. By integrating the dust removal module 20 and the dehumidification module 30 and separating them to the outside, it was designed to facilitate the management of existing pollution and failures.

Currently, plastics have many mechanical and chemical excellent functions, so their number is widespread throughout the industry. As such, the plastic dryer market requires many general hopper dryers or dehumidifiers. There are disadvantages in the management of the existing dehumidifiers such as inconvenience and the need to use a cooling water device. However, if the dryer is produced with a filter or a dehumidifying function according to the present invention, there are advantages in saving and managing a lot of energy, so it can be said that the possibility of use is large.

10: Hopper
20: Dust removal module (dust removal cyclone)
21: dust removal module entrance
22: dust removal module body
23: dust removal module dust collector
24: Separation pipe inside the dust removal module
25: dust removal module secondary filter insertion flange
26: dust removal module outlet
30: dehumidification module
31: dehumidification module compressor
32: dehumidification module condenser
33: dehumidification module expander
34: dehumidification module evaporator
35: dehumidification module condensate sump
40: air circulation module
50: heating module

Claims (4)

A hopper 10 for storing and drying plastics and: a dust removal module 20 connected to the upper end of the hopper 10 and a heating module 50 connected to the body at the other end: a dust removal module 20 One end is the hopper 10 and the other end Air circulation module 40: air circulation module 40 one end air circulation module 40 and the other end heating module 50: heating module 50 one end air circulation module 40 and the other end hopper 10: dust In the removal module 20, the dust removal module inlet 21, the dust removal module body 22, the dust removal module dust collector 23, the dust removal module inner separation tube 24, the dust removal module secondary filter insertion flange (25), the dust removal function of the dust removal module outlet 26: the dehumidification module 30 includes a dehumidification module compressor 31, a dehumidification module condenser 32, a dehumidification module expander 33, a dehumidification module evaporator 34, A drying device that combines a dehumidifying function and a dust removal function composed of a dehumidifying module water collecting tank (35). The drying device according to claim 1, wherein the dust removing function and the dehumidifying function are combined with the dehumidifying module evaporator (34) of the dehumidifying module (30) in the dust removing module (20). The dust removal function and dehumidification of claim 1, wherein the dust removal module dust collector of the dust removal module 20 and the dehumidification module water collector 35 of the dehumidification module 30 combine two functions (the dust removal dust container and the condensate water collector). Drying unit combining functions [Claim 2] The dust removal device according to claim 1, wherein the secondary filter insertion flange of the secondary filter is added to the dust removal module 20 in the dust removal module.

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