KR100616453B1 - Apparatus for measuring performance of air purify fiber filter - Google Patents

Abstract

The present invention relates to an apparatus for measuring the performance of a fiber filter for air purification, which can install and detach a filter in a shorter time, and ensures reliability of analytical data without exposure of a target gas even when the number of filters is increased. . An apparatus for measuring the performance of a fiber filter for purifying air according to the present invention includes a cylinder in which a plurality of measuring ports are opened and closed by valves, respectively, for measuring the concentration, pressure, and temperature and humidity of a target gas before and after passing through a filter. An apparatus body formed in a shape; A suction blower installed in the apparatus main body to adjust the flow rate of the target gas to suck the target gas into the apparatus main body; And a filter mounting tube installed in the apparatus main body between the plurality of measuring ports and equipped with one or more fiber filters whose performance test is measured by filtering a target gas sucked into the apparatus main body by the suction blower. By including; The performance of the filters is measured based on the number of filters and the pressure difference, concentration, and temperature and humidity values of the target gas before and after passage.

Filter performance test system, textile filter, filter mounting pipe, harmful gas, pressure difference

Description

Apparatus for measuring performance of air purify fiber filter

1 is a view schematically showing an apparatus for measuring the performance of a fiber filter for air purification according to the present invention.

2 is an exploded perspective view of a filter mounting tube, a filter, a filter retaining ring, and a filter support installed in an apparatus for measuring performance of an air purification fiber filter according to the present invention shown in FIG. 1.

3 is a cross-sectional view showing a state in which the filter mounting tube, the filter, the filter fixing ring and the filter support are installed in the apparatus main body.

Figure 4 is a graph measuring the pressure difference of the target gas before and after passing through the filter while changing the flow rate while increasing the urethane foam filters by one.

5 is a graph of increasing the pressure of the target gas before and after passing through the filter while changing the flow rate while increasing the polyester nonwoven filters 10 mm thick one by one.

(Explanation of symbols for the main parts of the drawing)

1: performance measuring device of fiber filter for air purification

2: apparatus main body 11: test gas suction pipe

12: Venturi tube 13: shear commutation grating

14 test gas measurement port 15 shear pressure difference measurement port

17: downstream pressure difference measurement port 18: the target gas measurement port

19: temperature / humidity measurement port 20: rear rectification grating

21: flow rate measuring instrument 22: suction blower

23: filter retaining ring 24: filter

25 filter mounting pipe 26 filter support

27: bolt

The present invention relates to an apparatus for measuring performance of a fiber filter for air purification, and more particularly, to a filter filter for easy attachment and detachment of a filter, to shorten the measurement time and improve airtightness of the device. It relates to a performance measuring device.

As is well known, filters for removing contaminants in indoor air are made in a wide variety. In addition, the use of the filter is very different depending on the target material to be removed from the air. Substances polluting indoor air are largely classified into fugitive dust and harmful gases. In the case of scattering dust, it is divided into total scattering dust, PM10 or less, PM 2.5 or less and PM1 or less according to the average particle diameter of the scattering dust. These scattering dust is collected through the dust collector and then separated from the cyclone, and only the purified air is discharged to the outside, and the dust collection efficiency is more than 90%. However, noxious gases in the air are continuously removed as pollutants in the air without being removed through the dust collector as described above.

Accordingly, in recent years, in consideration of economical and efficient aspects, filters for removing various kinds of harmful gases have been made. Such filters include active fiber carbon and polyurethane based woven and nonwoven fabrics, and polyester based filters. In addition, filters coated with ceramics, silver, photocatalysts and oxidation catalysts are used to remove contaminants in indoor air.

The conventional filter mounting method uses a bolt and nut at the front and rear ends of the filter in the fluid flow direction for one single filter, and uses an O-ring at the front and rear ends of the filter, and clamps the clamp after joining the filters. The method is being used.

However, the method of tightening the filter with bolts and nuts at the front and rear ends is difficult to increase the number of filters, and the bolts penetrate the end of the filter, so that the target gas leaks out through these through holes. In addition, the clamping method has a disadvantage in that it takes a lot of time to install the filter.

Therefore, an object of the present invention is to measure the performance of the fiber filter for air purification that can be attached and detached in a shorter time, while increasing the number of filters without exposure of the target gas to ensure the reliability of the analytical data To provide a device.

An object as described above includes an apparatus body formed in a cylindrical shape in which a plurality of measuring ports are opened and closed by valves, respectively, for measuring the concentration, pressure and temperature and humidity conditions of a target gas before and after passing through a filter; A suction blower installed in the apparatus main body to adjust the flow rate of the target gas to suck the target gas into the apparatus main body; And a filter mounting tube installed in the apparatus main body between the plurality of measuring ports and equipped with one or more fiber filters whose performance test is measured by filtering a target gas sucked into the apparatus main body by the suction blower. By including; The performance of the fiber filter for air purification according to the present invention is characterized by measuring the performance of the filters based on the number of the filters and the pressure difference, concentration and temperature and humidity values of the target gas before and after the passage. Can be.

In the above, the filters are supported by the filter support of the network structure is located at one end of the filter mounting pipe, it is installed in close contact in the axial direction by a filter fixing ring inserted from the other end of the filter mounting pipe.

In the above, the filter fixing ring is fixed inside the filter mounting tube by a plurality of bolts.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a schematic diagram of an apparatus for measuring performance of a fiber filter for air purification according to the present invention. As shown in FIG. 1, the apparatus 1 for measuring performance of an air purification fiber filter according to the present invention includes a device body 2 formed in a cylindrical shape, and a venturi tube provided at an intake end of the device body 2. (12), the rear rectifying grating 20 connected to the discharge end of the apparatus main body 2, the flow rate measuring instrument 21 provided at the rear end of the rear rectifying grating 20, and the target gas are sucked into the apparatus main body 2; In order to include a suction blower 22 installed in the flow rate meter (21). The apparatus main body 2 is formed in a cylindrical shape, and a filter mounting tube 25 to which the fiber filters 24 to which the performance test is measured is mounted is installed therein, and a plurality of measurements are carried out before and after the filter mounting tube 25. Ports 14, 15, 17, 18, 19 are formed.

The gas to be tested is a performance measuring device of a fiber filter for purifying air through a test gas suction pipe 11 connected to the venturi pipe 12 in the direction of an arrow A of FIG. 1 by the operation of the suction blower 22 ( Flows into 1). At this time, the gas flowing into the performance measuring device 1 of the air filter fiber filter is a gas generated in the gas generator, and when there is a change in the concentration of pollutants in the gas, nitrogen gas and gas generated in the gas generator The mixture may be introduced into the suction pipe 11.

The gas introduced into the performance measuring device 1 of the air purification fiber filter through the suction pipe 11 is further mixed while passing through the venturi pipe 12 connected to the suction pipe 11, and thus, the venturi pipe 12 Pass through the commutator lattice 13 provided adjacently. The target gas is rectified while passing through the rectifying grid 13, and the target gas passing through the rectifying grid 13 is sampled through the test gas measuring port 14 formed at the front end of the filter mounting tube 25. The sample of the target gas collected through the test gas measuring port 14 is analyzed for its components using a gas analyzer or an analysis kit.

In addition, the target gas passes through the filter mounting pipe 25 with the filter which is the object of performance evaluation after the pressure is measured through the shear pressure difference measuring port 15 formed at the front end of the filter mounting pipe 25. do. The filter mounting tube 25 is provided with a filter support 26 for supporting the filters 24 on the other end surface, as shown in Figs. 2 and 3, the filter support 26 is a filter support 26 While supporting, it has a network structure so that the target gas can pass therethrough. With the filter support 26 fixed to the other end face of the filter mounting tube 25, a number of filters 24 are inserted into the filter mounting tube 25 from one end of the filter mounting tube 25. . The plurality of filters 24 inserted into the filter mounting tube 25 are brought into close contact with each other in the axial direction by a filter retaining ring 23 inserted from one opening of the filter mounting tube 25 so that airtightness is maintained. In the filter retaining ring 23 is mounted in the filter mounting tube 25 by a plurality of bolts (27). Meanwhile, the axial length of the filter retaining ring 23 may be appropriately adjusted according to the number of filters 24 installed in the filter mounting pipe 25 for performance evaluation.

As described above, the target gases that are in close contact with each other and pass through the plurality of filters 24 installed in the filter mounting tube 25 pass through the filter 24 through the rear pressure difference measurement port 17 formed at the rear end of the filter mounting tube 25. The pressure after passing through is measured. The pressure of the target gas measured through the rear pressure difference measurement port 17 is compared with the pressure of the target gas measured through the front pressure difference measurement port 15. Using the pressure difference of the target gas, the pressure difference ΔP of the target gas passing through the filters 24 may be confirmed.

In addition, the concentration in the target gas filtered while passing through the filters 24 through the target gas measurement port 18 formed at the rear end of the filter mounting tube 25 is measured. The concentration of the target gas measured from the target gas measurement port 18 is compared with the concentration of the target noxious gas in the sample taken from the test gas measurement port 14, and the efficiency of the filters 24 is evaluated through the difference. Can be.

In addition, the reaction temperature and humidity in the performance test apparatus of the filters 24 for gas removal are measured through the temperature / humidity measurement port 19 of the harmful gas to be measured while passing through the filters 24. The object gas is discharged to the hood through the rear rectifying grating 20 and the flow rate measuring instrument 21 connected to the rear end of the apparatus main body 2. On the other hand, the flow rate of the target gas passing through the apparatus 1 according to the present invention can be adjusted by adjusting the blowing amount of the suction blower 22 connected to the rear end of the apparatus main body 2.

In addition, in the performance measuring device 1 of the air purification fiber filter according to the present invention, a plurality of fixing bolts 27 for fixing the filter fixing ring 23 to the filter mounting pipe 25 are provided with the filter mounting pipe 25. ), It is preferably fastened to the inner wall of the filter mounting pipe 25, it is possible to prevent the deformation of the fiber filter 24 due to the flow rate of the target gas and the back flow of the target gas due to the pressure difference.

The plurality of measuring ports 14 to 19 provided in the apparatus main body 2 are provided with a plurality of valves (not shown) for sampling and measuring, and for collecting a sample or measuring a state of a target gas. The valve installed in the measurement ports 14 to 19 is opened, and the valves are closed during the other states.

Experimental Example 1

Experimental Example 1 carried out an experiment in which pressure difference analysis of the urethane foam filter was evaluated using the performance measuring device 1 of the air filter for air purification according to the present invention. Pressure differential analysis is one of the very important factors in the method for evaluating the performance of the filter 24. The good ventilation for a certain amount of blowing is disadvantageous in that it is difficult to expect a relatively good treatment efficiency because the contact time between the filter 24 and the material to be treated is short. It has the advantage that the treatment capacity of the target material is large.

4 shows the pressure difference of the target gas before and after passing through the filter 24 while changing the flow rate while increasing the urethane foam filters 24 one by one. As shown in FIG. 4, the pressure difference between the target gases before and after passing through the filter 24 at 40 L / min at the lowest blowing flow rate is 5 Pa or less in one, two, or three of the filters 24. I could see the car.

When the air flow rate was increased to 200 L / min, the pressure difference was slightly increased than that of the 40 L / min air flow rate, and at 400 L / min when the air volume was doubled, the pressure difference rapidly increased, and the three filters When 24 were mounted, the pressure difference was found to increase to 18 Pa. In this experiment example, when it increased to 600 L / min which is the maximum blowing flow volume, the pressure difference when using one, two, and three filters showed the value of 18, 29, 38 Pa. Therefore, from FIG. 4, as the number of filters 24 used increases, not only the pressure difference of the target gas before and after passing through the filter 24 increases, but also the blowing flow rate also increases, before and after passing through the filter 24. It can be seen that the pressure difference increases.

Experimental Example 2

Experimental Example 2 was conducted to evaluate the pressure difference analysis of the polyester nonwoven filter using the performance measuring device (1) of the fiber filter for air purification according to the present invention.

FIG. 5 is a graph measuring pressure difference of a target gas before and after passing a filter while increasing a flow rate of polyester nonwoven filters having a thickness of 10 mm one by one. When the filters 24 are passed through one, two, or three at the flow rate of 40 L / min, which is the lowest at the blowing flow rate, the pressure difference of the target gas before and after passing through the filter 24 is equal to or less than 40 Pa. Seemed. When the blowing flow rate was increased to 200 L / min, the pressure difference slightly increased from the blowing flow rate of 40 L / min. At 400 L / min, which doubled the blowing amount, the pressure difference of the target gas before and after passing through the filter 24 increased rapidly, and when the three filters 24 were attached, the pressure difference increased to 150 Pa. When the air blowing amount was increased to 600 L / min, the pressure difference between the three filters 24 was 281 Pa.

As described above, according to the performance measuring apparatus and the measuring method of the fiber filter for air purification according to the present invention, a number of different filters can be mounted through the filter mounting pipe during the filter performance test for degassing, so that a shorter time In addition, the filter can be mounted and detached in the inside, and even if the number of filters is increased, there is no exposure of the target gas, thereby ensuring the reliability of the analytical data.

In addition, since the filters are fixed by the filter fixing ring installed on the inner wall of the filter mounting pipe, deformation of the fiber filter due to the flow rate of the target gas and reverse flow of the target gas due to the pressure difference can be prevented. It can easily reduce the measurement time and prevent the loss of analytical gas through the tightness of the device to increase the reliability of the analytical data.

Claims (3)

A device body formed in a cylindrical shape in which a plurality of measuring ports are opened and closed by valves for measuring the concentration, pressure, and temperature and humidity of the target gas before and after passing through the filter; A suction blower installed in the apparatus main body to adjust the flow rate of the target gas to suck the target gas into the apparatus main body; A filter mounting tube installed in the device body between the plurality of measurement ports and equipped with one or more fiber filters whose performance test is measured by filtering a target gas sucked into the device body by the suction blower. By doing; And measuring the performance of the filters based on the number of the filters and the pressure difference, concentration, temperature, and humidity values of the target gas before and after the passage. The filter assembly of claim 1, wherein the filters are supported by a filter support having a network structure positioned at one end of the filter mounting tube, and are closely installed in the axial direction by a filter fixing ring inserted from the other end of the filter mounting tube. Performance measuring device of the fiber filter for air purification, characterized in that. The apparatus of claim 2, wherein the filter fixing ring is fixed inside the filter mounting tube by a plurality of bolts.

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