KR100577925B1 - A Filtering Device Including the Separator Using Centrifugal Force - Google Patents

Abstract

The present invention relates to a desorption type filtration apparatus using centrifugal force installed in the middle of an exhaust duct.

A vortex casing (100) having an inlet (110) formed at a side, and an outlet (120) formed at an axial upper portion; A hollow park cylindrical filter 200 mounted in communication with the outlet 120 in the vortex casing 100; An electric motor 300 for driving the hollow park cylindrical filter 200; It is configured to include a discharge unit 150 formed on the bottom of the vortex casing 100,

When the filter is partially closed by the adhesive material (DOP), the centrifugal force acts to automatically detach the adhesive material, so it is not necessary to separate and clean it during the operation, thereby reducing maintenance time and extending the life. The advantage is that it can be done.

Description

A Filtering Device Including the Separator Using Centrifugal Force}

1 is a perspective view of a filtration device according to the present invention.

2 is a partial cross-sectional perspective view of the filtration apparatus according to the present invention.

3 is a plan sectional view of a filtration device according to the present invention.

4 is a perspective view illustrating the filtration and desorption process.

5 is a graph showing the history of the pressure loss according to the use time when the filtration device according to the present invention is used.

6 is a perspective view showing a test apparatus for measuring filter efficiency.

Fig. 7 is a diagram showing an apparatus for dehydration test and durability test of a filter.

※ Explanation of Major Drawings

100 ... Vortex Casing

110 ... Inlet of vortex casing

120 ... Outlet of the Vortex Casing

150 ... DOP Condensate Discharge Valve

200 ... Hollow Park Cylindrical Filter

210 ... air filter

220 ... glass fiber filter

230 ... HEPA Filter

300 ... electric motor

400 ... Wire Mesh Filter

1000 ... Tally type filter

The present invention relates to a desorption type filtration apparatus using a centrifugal force, and more particularly, to a desorption type filtration apparatus using a centrifugal force, in which maintenance costs are reduced, lifespan is excellent, and filtration efficiency is excellent in filtration of mist type viscous substances.

A large amount of DOP (dioctylphthalate) is used as a plasticizer in the calendering process and film injection and molding processes in film and sheet manufacturers. These plasticizers are liquid substances that have the same viscosity as edible oils and, due to their characteristics, do not scatter into the atmosphere under normal temperature and normal pressure, but are easily evaporated under extreme conditions under the high temperature and high pressure generated by the rollers in the film or sheet manufacturing process described above. Can be formed. In this case, it is sprayed into the atmosphere in the form of a large amount of mist.

In general, since the viscous material is mostly carcinogenic or toxic harmful substances, it is necessary to immediately discharge the viscous harmful substances remaining in the room using an air purifier or the like. As the air purifier, a bag filter or an electrostatic precipitator connected to a fan is used.

However, in the case of the conventional bag filter, a phenomenon in which the droplets, which had a high temperature and a low viscosity at the initial stage of inhalation, was cooled in the middle of reaching the air purifier, and the viscosity increased greatly. Accordingly, in many cases, the droplets adhere to the surface of the filter to block pores, thereby greatly reducing the filtration performance of the bag filter.

In addition, even in the case of the electrostatic precipitator, there is a disadvantage in that the sticky liquid droplets adhere to the electrode and the function of removing the mist in a short time disappears.

As a result, conventionally, a large amount of harmful washing liquids have to be used to repair the air purifier, and the cleaning cycle is very short. In addition, additional management personnel were required to do this, resulting in additional costs due to labor costs.

In addition, the productivity had to be greatly reduced since the equipment had to be shut down during cleaning.

The present invention has been made to solve the above problems, the object of the invention is to automatically desorb the adhered mist-type viscous material to reduce the maintenance time, extend the life, and also increase the filtration efficiency, using centrifugal force To provide a detachable filtration device.

In order to achieve the above object, the detachable filtration device using the centrifugal force according to the present invention,

A vortex casing having an inlet formed at a side thereof and an outlet formed at an axial direction thereof;

A hollow-cylindrical filter mounted inside the vortex casing to communicate with an outlet;

An electric motor for driving the hollow cylinder cylindrical filter;

A discharge part formed at the bottom of the vortex casing;

Characterized in that comprises a.

The inlet of the vortex casing is preferably equipped with a wire mesh filter.

It is preferable that the hollow-cylindrical filter consists of a glass fiber filter.

It is more preferable that the hollow-cylindrical filter has a structure in which a glass fiber filter and an air filter are laminated.

Preferably, the glass fiber filter or the laminated glass fiber filter and the air filter have a HEPA filter laminated therein.

On the other hand, the air filter is preferably a plastic foam filter.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 to 3 show the structure of the detachment type filtration apparatus using the centrifugal force according to the present embodiment.

The desorption type filtration apparatus 1000 using the centrifugal force is provided in the middle of the duct through which the mist type viscous substance is discharged. In addition, a fan for discharging is provided at the rear, and harmful viscous substances can discharge the filtered air out.

As shown, the desorption type filtration apparatus using the centrifugal force according to the present embodiment is largely composed of a vortex casing 100 and a hollow-cylindrical cylindrical filter 200 rotatably installed in the vortex casing 100. It is. This configuration will be described in more detail below.

First, in the vortex casing 100, an inlet 110 is formed on the side surface, the outlet 120 is formed in the axial direction of the vortex type.

The inlet 110 is equipped with a wire mesh filter 400, it is possible to primarily filter the mist of the viscous material.

In addition, the bottom of the vortex-type casing 100 is formed with a discharge portion 150 that can be discharged by the accumulated condensed viscous material. The discharge unit 150 may be composed of a general discharge hole and the discharge valve.

In addition, the hollow park cylindrical filter 200 is installed in the vortex casing 100 so as to communicate with the outlet 120.

Accordingly, the mist-type viscous material introduced through the inlet 110 of the vortex type casing 100 rotates along the space formed between the inner surface of the vortex type casing 100 and the outer surface of the hollow-cylindrical filter 200, and then the filter. Gathered toward the center through the 200 to pass through the outlet 120 is to exit in the axial direction of the vortex type. At this time, most of the filtration is performed in the hollow-cylindrical filter 200.

The hollow-cylindrical filter 200 has a configuration in which an air filter 210, a glass fiber filter 220, and a HEPA filter 230 are stacked from the outside. Here, the hepa filter 230 may be omitted.

The air filter 210 may use a filter made of a plastic foam.

In addition, the glass fiber filter 220 of the glass fiber material having a filling rate of 65%, 85%, 95%, etc. of the market, it was found that 95% glass fiber material through the air permeability test.

In addition, the HEPA filter 230 is composed of a special electrified fiber, it is possible to filter small particles, such as dust up to 0.3㎛ by the force of static electricity is employed for post-treatment. However, a material without water repellent coating is preferred.

The hollow-cylindrical filter 200 is excellent in filtration efficiency even if only one of the air filter 210 and the glass fiber filter 220 is installed without the HEPA filter 230.

On the other hand, the hollow-cylindrical cylindrical filter 200 is connected to the electric motor 300, when the viscous material more than the limit is adhered to the filter 200 after a predetermined use time has elapsed when the pressure loss is increased, the rotational operation to the centrifugal force It is comprised so that an adhesive may detach | release. This reduces the pressure loss and restores the filtration function again.

At this time, even if the hollow-cylindrical cylindrical filter 200 rotates, the boundary portion of the hollow-cylindrical cylindrical filter 200 and the vortex-type casing 100 needs to be surely sealed so that the mist-type viscous material does not leak.

Hereinafter, an operation example of the detachable filtration device using the centrifugal force according to the present embodiment will be described.

As shown in FIG. 4, first, the DOP mixed airflow entering the inlet 110 of the vortex casing 100 is partially condensed primarily while passing through the wire mesh filter 400 to separate gas and liquid. The filtered DOP droplets flow down and are collected and then discharged through the DOP condensate discharge valve 150.

The DOP liquid, which is not yet completely separated from the wire mesh filter 400, passes through the air filter 210, the glass fiber filter 220, and the HEPA filter 230. At this time, the condensed and filtered DOP liquid flows down and is discharged through the discharge valve 150, and the clean airflow is discharged to the outside through the center of the vortex-type casing (100).

On the other hand, after a certain time, the pressure in the purifier is increased due to the DOP liquid adhered to the pores of the filter, the pressure loss is increased and the filtration efficiency is reduced. In this case, by operating the electric motor 300 coupled to the hollow-cylindrical filter 200, by removing the DOP contained in the filter 200 by using centrifugal force, the pressure is reduced to the initial state and the filtration efficiency is restored. . The operation of the electric motor 300 may be provided with a control device so that the electric power is connected when the internal pressure is measured to reach a predetermined pressure, and may be manually connected to the power according to an empirically determined time. In addition, it is preferable to make the motor 300 variable in speed so that the rotation speed can be changed according to the viscosity of the DOP droplet.

Figure 5 shows in detail the history of pressure loss when centrifugal desorption at timed intervals in accordance with the present invention. As shown, it becomes clear that the function of the filter can be restored by automatic desorption so that the life of the purifier can be greatly extended compared to the general bag filter.

[Filter Test Example]

The following is a test of some of the filters finally selected from commercial filters.

1. Filter efficiency test

6 shows a test apparatus for various filter efficiencies included in the present invention.

The results of pressure loss and removal efficiency of various filters according to the flow rate are shown in the following [Table 1].

The 95% glass fiber filter showed a mist removal efficiency of more than 86% regardless of the flow rate of the filter, and the air filter and wire mesh filter showed low removal efficiency.

In particular, air filters and wire mesh filters were expected to be used as pretreatment filters and tested at relatively high suction flow rates, resulting in low mist removal efficiency. Mist removal efficiency was higher for wire mesh filters than for air filters.

The HEPA filter was tested in the wet state and had low mist removal efficiency, which was not suitable for use in pretreatment.

In terms of pressure loss, the wire mesh filter and the air filter had the lowest pressure loss compared to the other filters. In addition, it can be seen that the air filter is not suitable as a pretreatment filter with a high pressure loss while having a lower efficiency than that of the wire mesh filter.

In the case of the 95% glass fiber filter, the pressure loss was relatively high.

In the case of the HEPA filter, high pressure loss was observed even at a slow flow rate in the wet state.

Accordingly, in order to maintain the efficiency of the air purifier, it is considered that a 95% glass fiber filter should be used as the main filter, and a wire mesh filter should be used as the pretreatment filter.

On the other hand, since the removal efficiency was high at 7 m / s when using the wire mesh filter, it is necessary to keep the flow rate of the initial pre-treatment filter quickly.

2. Dehydration test

7 shows a schematic configuration of a dehydration test apparatus.

As shown, the device was formed into a cylindrical shape, and the filter was attached to the cylindrical rotating body. In addition, the cylindrical filter attacher thus attached was rotated at a desired speed by a motor using an inverter.

The test method was carried out by measuring the weight of the filter after the DOP liquid injection, dewatering according to the rotation speed, and then measuring the filter weight to obtain the difference.

Table 2 shows the results of the filter dehydration test. The dehydration test is a test whether it can be used as a main filter. The higher the amount of dehydration, the more suitable as the main filter.

As a result of the filter dehydration test, as the number of filter rotations increased, the amount of dehydration of the DOP solution increased.

In addition, the 95% glass fiber filter showed that the dewatering power increased rapidly as the rotation speed increased, showing the highest efficiency at 450 rpm.

In the case of the air filter, the dehydration capacity was relatively high at low rotational speeds. However, even if the rotation speed was increased, the amount of dehydration did not increase rapidly compared with other filters.

95% glass fiber filter showed the best dehydration rate, and the above filter efficiency test result showed that the 95% glass fiber filter showed the best performance as the main filter. If the durability change is not large, it will be very suitable as the main filter.

3. Durability test

3-1. Durability test method

Filters suitable for centrifugal force desorption filtration systems shall be of a material that can withstand centrifugal forces when dewatered. If the original shape of the filter is changed by the centrifugal force, causing problems in mist removal efficiency, it cannot be applied to the centrifugal force air purifier. Therefore, the durability test was conducted on the 95% glass fiber filter, it was confirmed whether the air filter can function as a complementary filter.

As a test method, the test apparatus shown in FIG. 7 was repeatedly tested for 10 hours after spraying 1 L of DOP solution at 450 rpm for 20 minutes for 10 minutes, and then examined the state of the filter by SEM (Scanning Electron Microscope, S-300H, HITACHI) and confirmed by tensile strength and breathability test.

In the tensile strength test, the tensile strength tester (DTU-900MH A) was used to measure the tensile strength in the width and length directions using a 50mm wide and 76mm long specimen. Was 200 mm / min. The measuring method was carried out according to "Measuring method of tensile strength and elongation of KS K 0520 fabric". Elongation was also measured in the tensile strength test.

3-2. Durability Test Results

3-2-1. SEM results

SEM images were taken to determine the durability of the filter material before and after the test.

3-2-2. Tensile Strength and Breathability Test Results

As shown in Table 3 below, it was found that the tensile strength of the 95% glass fiber filter slightly increased by compression by dehydration. At this time, the thickness of the filter should be more than a certain degree to achieve uniform compression and obtain a predetermined tensile strength. In addition, even if the air filter was enclosed in the glass fiber filter, the size change in the tensile strength was not large.

On the other hand, since the filter was compressed due to dehydration, the air permeability after dehydration was lower than that of a pure filter not filtered before dehydration. However, when the air filter was wrapped around the 95% glass fiber filter, the air permeability increased to a value similar to that of the 95% glass fiber filter before dehydration.

3-3. Durability test conclusion by adding air filter

With the addition of the air filter, there is little change in the structure change and tensile strength before and after dehydration, it is desirable to supplement the durability by adding an air filter to the glass fiber filter. However, if the degree of air permeability described above is employed, even if only the 95% glass fiber filter is employed without the air filter, there is no major problem in maintaining the function of the air purifier according to the present invention.

According to the present invention having the above-described configuration, when the filter is partially closed by the adhesive material, the centrifugal force can act to detach the adhesive material automatically, so that it is not necessary to separate and clean it during the operation, thereby reducing the maintenance time. There is an advantage that it can reduce, and extend the life.

In addition, by adopting a filter having good filtration efficiency to the viscous material, there is an advantage that can significantly reduce the air pollution.

Claims (7)

delete delete In the filtration device of the air purifier is installed in the middle of the exhaust duct, A vortex casing (100) having an inlet (110) formed at a side, and an outlet (120) formed at an axial upper portion; A hollow park cylindrical filter 200 mounted in communication with the outlet 120 in the vortex casing 100; An electric motor (300) for rotationally driving the hollow-cylindrical filter (200) when the pressure in the purifier reaches a predetermined value or more; A discharge part 150 formed at a bottom of the vortex casing 100; It is configured to include, The inlet 110 of the vortex type casing 100 is equipped with a wire mesh filter 400 as a pretreatment filter, and the hollow-cylindrical filter 200 is composed of a glass fiber filter 220. Desorption type filtration device using a centrifugal force. The method of claim 3, The hollow-cylindrical filter 200, the detachment type filtration device using a centrifugal force, characterized in that it further comprises an air filter 210 on the outside. The method of claim 3, The hollow-cylindrical filter 200, the desorption type filtration device using a centrifugal force, characterized in that the HEPA filter 230 is laminated on the inside of the glass fiber filter 220. The method of claim 4, wherein The hollow-cylindrical filter 200, the separation filter type using a centrifugal force, characterized in that the hepa filter 230 is laminated on the inner side of the laminated glass fiber filter 220 and the air filter 210. The method of claim 4, wherein The air filter 210 is a detachable filtration device using a centrifugal force, characterized in that the plastic foam filter.

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