KR200396829Y1 - Filter for measuring instrument of toxic substance of building materials - Google Patents

Abstract

The present invention relates to a clean filter of a tester for measuring harmful substances in building materials, and more specifically, to measure the amount of emission of volatile organic compounds (VOC) and formaldehyde, which are hazardous substances emitted from various building materials. Air supply to generate air, purge air supply to purify the generated air and branch to dry and wet air, vortex mixing coil to mix dry and wet air as a constant temperature chamber, temperature and humidity unit to control air temperature and humidity A mass flow controller (MFC) that sucks air in a fixed quantity, a sample chamber into which the purified air enters and fixes the sample, an adsorption tube for collecting harmful substances in the exhausted air including harmful substances through the sample, and a mass flow controller (MFC) In the tester for the measurement of harmful substances consisting of a pump and a pump, the high purity of the air supplied to the constant temperature chamber The cleaning filter of the testing machine for construction materials harmful substances measured configured further configured to clean the activated carbon filter was built outside the purging air supply, the air is to be a long time of stay in the area of activated carbon are provided for.

Description

FILTER FOR MEASURING INSTRUMENT OF TOXIC SUBSTANCE OF BUILDING MATERIALS}

The present invention is a tester for measuring hazardous substances configured to measure the emission of volatile organic compounds (VOC) and formaldehyde, which are harmful substances emitted from building materials, and is supplied to a constant temperature chamber and used for testing. The present invention relates to a clean filter of a tester for measuring harmful substances in building materials, in which a clean filter containing activated carbon is added for high purity clean air.

As the society is highly industrialized, the concentration of urban centers of the population gathered into the city center has caused many social problems such as social conflict between urban and rural areas and environmental pollution due to the difficult development of the city center.

As the population of the city grows, various buildings for houses and offices are increasing exponentially.In recent years, harmful materials emitted from various building materials such as building plywood, flooring, wallpaper, paints and adhesives are the cause of various diseases. It is becoming.

Volatile Organic Compound (VOC), one of the harmful substances, is a representative pollutant that causes photochemical ozone pollution in summer and is harmful to the human body and gives off odor. It is defined as petrochemical, organic solvent or other substances, and is used in many industries. From solvents to organic gases emitted from chemical and pharmaceutical plants or plastic drying processes, hydrocarbons commonly used in everyday life, such as low boiling liquid fuels, paraffins, olefins, aromatics, etc., are mostly VOCs.

In addition, formaldehyde is used for antiseptic and disinfection sterilization and inhibits the growth of bacteria, viruses, molds, etc., and it is very toxic to the human body, causing symptoms such as memory loss, mental concentration, and lethal effects on the human body. Crazy

Accordingly, in recent years, a method of minimizing the emission of hazardous substances has been utilized by measuring, managing, and setting the standards for the emission amount of the hazardous substances from various building materials. We have proposed a tester for measuring harmful substances in building materials (patent application No. 2004-0013446).

Test equipment for measuring the hazardous substances of building materials referring to Figure 1, the air supply 111 to suck the outside air, purifying by removing various foreign substances contained in the inhaled air and purifying air supply for branching and supplying dry and wet air ( 110), the vortex mixing coil 150 mixing the dry / wet air obtained above, the temperature / humidity controlled by the sensor 121 by introducing the mixed air and displaying it in the monitoring apparatus 122. A mass flow controller (Mass Flow Controller) connected to the humidity unit (120), the sample chamber (130) for supplying and discharging the air controlled by the temperature / humidity unit and storing the test sample, and communicating with the inside of the sample chamber; MFC) and a pump (hereinafter, referred to as an MFC pump) 141 are configured to adsorb harmful substances in the adsorbent material filled therein when forcibly discharging the air in the sample chamber.

However, the purifying air supply 110 in the testing machine for measuring the hazardous materials for building materials of FIG. 1 generally purifies the air through several stages of filters, as described later, but passes through the purifying air supply 110. Because the air contained pollutants close to 20 µg / m 3 (TVOC standard) with very small amounts of water, more accurate measurements of VOC and formaldehyde could not be expected.

Accordingly, the present invention has been devised to solve the above-mentioned problems, and the first object of the present invention is to purify the air purified by the purification air supply for a long time through a clean filter having a more precise structure, thereby purifying high purity purified air. To provide a tester for measuring the hazardous substances of building materials that can be supplied.

The second object of the present invention is to provide a tester for measuring the hazardous materials of building materials, which can improve reliability by minimizing the error of the measurement value of the hazardous materials by achieving the first object.

The present invention for achieving the above object is to measure the emission amount of volatile organic compounds (VOC) and formaldehyde (VOC) which are harmful substances emitted from various building materials, such as plywood, flooring, wallpaper, paint, adhesives, etc. In order to purify the air generated in the air supply 111, the air generated in the air supply as shown in Figure 1, the purge air supply 110 for branching and supplying dry and wet air, the gun as a constant temperature chamber 101 Equipped with a vortex mixing coil 150, a sensor 121, and a monitoring device 122 to mix air and wet air, the temperature and humidity unit 120 to control the temperature and humidity of the air, and the purified air is introduced to fix the sample Sample chamber 130, the adsorption tube 140 for collecting harmful substances in the exhausted air including harmful substances through the sample and the mass flow controller (M) to suck the air in the quantity (M In the tester for measuring harmful substances consisting of an ass flow controller (MFC) and a pump 141, activated carbon is supplied to the outside of the purified air supply 110 for high purity clean of the air supplied to the sample chamber 130 equipped with the sample. Its characteristics are that it further comprises a built-in clean filter.

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

Figure 2 is a partial detailed view of the testing machine for measuring the hazardous materials of building materials configured with a clean filter according to an embodiment of the present invention.

The purified air supplier 110 referring to FIG. 2 purifies moisture and organic substances in the air generated from the air supplier 111, and generates wet air obtained from the purified dry air 118 and the moisture absorber 119. By performing the role of sending to the vortex mixing coil (150).

The filter for purifying water and organic substances in the air includes a first step filter 112 and a second step filter 113, a third step filter 114, and a fourth step filter ( 115, a second step filter including the fifth step filter 116 and the sixth step filter 117.

The first step filter 112 and the third step filter 114 are composed of silica gel (SILICAGEL), the second step filter 113 and the fourth step filter 115 is composed of activated carbon, the fifth step filter The 116 and the sixth step filter 117 are composed of MOLECULAR SIEVE 4A and 5A, respectively, and the first stage filter adsorbs and removes general moisture and organic matter, and the second stage filter filters a small amount of moisture. Remove organics and other contaminants.

Silica gel, which is one of the adsorbents, has a uniform pore distribution and is porous, and due to its characteristics, the adsorption power to moisture is very large, and thus it can adsorb moisture in the air.

In addition, activated carbon is a chemical and physical heat treatment of charcoal by adding water vapor of 600 to 900 ° C. in order to further activate the adsorption power of carbonized charcoal. Adsorption is possible.

In addition, the molecular sieve applied to the fifth step filter 116 and the sixth step filter 117 has a very regular and fine pore structure, and in particular, it can adsorb a material requiring a low dew point (dew point). It can not adsorb in the first stage filter and can adsorb the remaining amount of moisture.

On the other hand, as a next step of the purified air passed through the sixth step filter 117, as shown in order to purify the purified air of high purity to constitute a clean filter (10) containing activated carbon separately from the purified air supply (110), The clean air passing through the clean filter 10 is branched into the dry air and the wet air as in the prior art.

3 is a longitudinal cross-sectional view showing a structure of a clean filter according to an embodiment of the present invention, wherein the clean filter 10 shown in FIG. 3 has a frame (2) protruding in a circular shape at the bottom thereof, and the bottom thereof is closed. It is composed of a cylindrical body (1) having an open top and a cover (3) provided to cover the top of the body (1) and having an exhaust port (12) formed at the center thereof. It is preferable to make it larger than the diameter of 1), and to make the diameter of the said cover 3 substantially the same as the diameter of the frame 2.

The fastening type of the body 1 and the cover 3 has a fixing pin 5 having a head 6 so as to penetrate the frame 2 and be fixed at the lower end of the frame 2. The nut 7 is fastened by fastening the nut 7 to the tip of the fixing pin 5 in a state where the cover 3 is protruded through the nut, and the nut 7 can be fastened without a tool. Can be adopted.

A plurality of fixing pins 5 are radially installed at the periphery of the frame 2 and the cover 3, and when the nut 7 is rotated in the tightening direction, the body 1 and the cover 3 are pressurized to seal each other. This is possible, and a packing (not shown) may be added to the top of the body 1 to maintain and improve airtightness with the cover 3.

In the lower part of the clean filter 10 configured as described above, an intake pipe 11 for guiding purge air into the clean filter is installed, and the intake pipe 11 has several injection holes 11a for injecting purge air. Is provided.

The injection port 11a is preferably provided at the lower portion of the intake pipe 11 so that air can be evenly distributed and ascended in the entire interior of the body 1.

The upper portion of the intake pipe 11 is provided with a porous plate 13 having an outer diameter of approximately the same size as the inner diameter of the trunk 1 and having a plurality of holes 13a formed in the entire area, and the upper portion of the porous plate 13. The small diameter plate 14 having a diameter smaller than the inner diameter of the clean filter 10 is installed, the hollow plate 15 having a hole in the center is installed on the small diameter plate 14, the hollow plate 15 The small diameter plate 16 which is smaller in diameter than the inner diameter of the clean filter 10 is also installed in the upper part of the filter.

The small diameter plates 14 and 16 and the hollow plate 15 are not limited to the illustrated example, but may be installed in different orders, and may be changed by increasing or decreasing the number thereof.

The inside of the clean filter 10 configured as described above, that is, the upper end of each of the porous plate 13, the small diameter plate 14, 16 and the hollow plate 15 is filled with activated carbon 17, hereinafter, the clean filter 10. The air flow action of the will be described.

As shown in FIG. 2, the purified air in which water, organic matter, and contaminants are removed to some extent from the first and second stage filters of the purified air supply 110 is selected from the adsorption tube 11 of the clean filter 10 shown in FIG. 3. Guided by the injection hole (11a) is injected, the injected air is uniformly distributed with respect to the entire area of the clean filter 10 through the hole (13a) of the porous plate 13 is led to the upper portion, wherein the air is activated carbon (17) In this case, air is guided by the small diameter plate 14 between the outer circumference of the small diameter plate 14 and the inner circumference of the clean filter 10 so as to stay in the activated carbon 17 region for a long time.

The air passing through the outer circumference of the small diameter plate 14 is guided to the hole formed in the center of the hollow plate 15 by the hollow plate 15, and the air passing through the hollow plate 15 is transferred to the small diameter plate 16. The small diameter plate 16 is guided to the outer circumferential direction of the small diameter plate 16 and is discharged through the exhaust port 12. Thus, the air guided into the clean filter 10 may be formed by the small diameter plate 14, 16 and the porous plate 15. It is possible to obtain high purity clean air by staying in the activated carbon 17 for a long time by the alternating and laminated structure.

On the other hand, the activated carbon 17 located inside the clean filter 10 is the same as the activated carbon mounted in the second step filter 113 and the fourth step filter 115, or activated carbon with improved adsorptive power than those. Can be used.

For example, unlike conventional activated carbon having a cross-sectional area of 250 m 2 per 1g, using activated carbon made of palm trees having an internal cross-sectional area of about 1,200 m 2 per 1 g, the adsorption of water, organic matter and pollutants more completely. The high purity clean air thus obtained may be introduced into the constant temperature chamber 101 to reduce a range of errors of VOC and formaldehyde measurements.

As described above, according to the clean filter of the test equipment for measuring the hazardous materials of building materials according to the present invention, high purity clean air can be obtained by purifying air purified by the purified air supply for a long time through a clean filter having a more precise structure. Will be.

The activated carbon layer in the clean filter may form a plurality of layers by alternating stacking of a small diameter plate and a hollow plate, and as illustrated, if a clean filter having four activated carbon regions is provided, In addition to the sixth step filter, four more filters are used, and by supplying high-purity clean air through the process to the sample chamber, the amount of VOC and formaldehyde emitted from the sample can be more accurately measured. In addition, it has a useful effect to improve the reliability of the device by minimizing the error of the measurement value of the hazardous substances.

Figure 1 is a schematic diagram showing the overall configuration of a conventional test equipment for measuring harmful substances in building materials.

Figure 2 is a partial detailed view of the testing machine for measuring the construction materials hazardous materials configured clean filter according to an embodiment of the present invention.

Figure 3 is a longitudinal sectional view showing the structure of a clean filter according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10: clean filter 11: air supply pipe

13: perforated plate 14, 16: small diameter plate

17: activated carbon 110: purified air supply

111: air supply 112, 113: first, second step filter

114, 115, 116, 117: 3rd, 4th, 5th, 6th step filter

150: vortex mixing coil

Claims (3)

Air supply to generate air, purge air supply for air purification, temperature and humidity unit to control the temperature and humidity of the air, the sample chamber to intake / discharge the controlled air and store the sample, connect the purifying air supply from the sample chamber In the testing equipment for measuring harmful substances consisting of an exhaust pipe, an adsorption tube branched from the exhaust pipe to collect harmful substances, and an MFC pump for quantitatively sucking air in the sample chamber, The purifying air supply comprises a first stage filter in which silica gel and activated carbon are sequentially formed, and a second stage filter in which silica gel, activated carbon and MOLECULAR SIEVE are sequentially formed, and the purification between the purifying air supply and the vortex mixing coil is performed. Clean filter of test equipment for measuring the hazardous substances of building materials, characterized in that a clean filter with activated carbon built in separate from the air supply. The method according to claim 1, The clean filter has a frame protruding in a circular shape at the bottom and a bottom end is closed but a suction pipe for drawing purge air at the bottom, and a body having the top open, and having a diameter substantially equal to the diameter of the frame and having a center. A cover having an exhaust port to cover the upper end of the body, and a plurality of fixing pins which are partially fixed to the rim through the rim and the cover around the body, and nuts that are each screwed together at the tips of the plurality of fixing pins. Consists of, clean filter of the tester for measuring the contaminants of building materials, characterized in that the inside is filled with activated carbon. The method according to claim 1 or 2, A suction pipe having a plurality of injection holes for introducing purge air in the lower part of the clean filter and an exhaust port at an upper end thereof, and a perforated plate having several holes distributed over the entire area is installed in the upper part of the suction pipe, Tester for measuring the harmful substances in building materials, characterized in that between the plate and the exhaust port, a small diameter plate having a diameter smaller than the inner circumferential surface of the clean filter and a hollow plate having a central hole are alternately installed, and at least one of them is laminated, and activated carbon is filled therein. Of clean filter.