KR100575038B1 - Cleanning apparatus of an adsorbenttrap for oder and voc analysis - Google Patents

Abstract

The present invention relates to an adsorption trap cleaning apparatus for odor and VOC analysis. The present invention relates to an adsorption trap cleaning apparatus in which an appropriate pressure of helium or nitrogen gas is applied to a adsorption trap for a predetermined temperature and time to completely desorb residual gaseous substances remaining in the adsorption trap. It is an object of the present invention to provide an adsorption trap cleaning device for odor and VOC analysis.

The present invention includes a large amount of adsorbent therein for analyzing malodors and VOCs, and in the adsorption trap for collecting malodors and VOCs in the air, supplying power to the apparatus, setting driving time, and determining individual driving of thermal desorption means. Key setting means for generating a key setting signal for setting the flow rate; Heat desorption means having a plurality of heating wires provided therein, and inserting the adsorption traps therein to thermally desorb the gaseous substances remaining in the adsorption traps through the heating wires; Moving means configured on a lower surface of the heat desorption means for moving the heat desorption means to a predetermined position; Moving gas storage means for storing helium gas or nitrogen gas therein and taking out the residual sample activated in the adsorption trap by using the moving gas; The flow rate adjusting means for adjusting the flow rate of the moving gas in the middle of the moving gas storage means and the heat desorption means; The power supply is controlled to the heating wire of the thermal desorption means so that the adsorption trap is thermally desorbed during the set driving time from the key setting means, and the flow rate adjusting means and the moving gas storage means are controlled so that a gas having a predetermined pressure is applied to the suction trap. To be introduced into one end, characterized in that consisting of a control means provided with a timer therein.

According to the present invention, the remaining gaseous substances in the adsorption traps used for analyzing odors and VOCs can be reused again by completely unattended cleaning, and the adsorption traps can be cleaned individually and simultaneously. And, by automatically moving the high temperature thermal desorption device there is an effect of reducing the risk of safety accidents at work.

Description

Adsorption trap cleaning device for odor and VOC analysis {CLEANNING APPARATUS OF AN ADSORBENTTRAP FOR ODER AND VOC ANALYSIS}

1 is a perspective view showing the external appearance of the adsorption trap cleaning apparatus for odor and VOC analysis according to an embodiment of the present invention,

Figure 2 is a schematic diagram showing the configuration of the adsorption trap cleaning device for odor and VOC analysis according to an embodiment of the present invention,

Figure 3 is an exploded perspective view showing the moving means of the heat desorption member in the adsorption trap cleaning apparatus for odor and VOC analysis according to an embodiment of the present invention,

4 is a view showing the configuration of the heating wire of the thermal desorption member in the adsorption trap cleaning apparatus for odor and VOC analysis according to an embodiment of the present invention,

Figure 5 is a block diagram showing the circuit configuration of the adsorption trap cleaning apparatus for odor and VOC analysis according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

2: mobile gas storage tank, 4: pressure regulator,

8: flow controller, 6, 10, 14, 22: guide,

16: control valve, 26: fitting member,

30: thermal desorption apparatus, 32: insertion hole,

110: adsorption trap, 200: control box,

300: support board.

The present invention relates to an adsorption trap cleaning apparatus for odor and VOC analysis, and more specifically, an adsorption trap by raising the desorption temperature for optimally calculated temperature and desorption minimum time, and injecting helium or nitrogen gas at an optimum flow rate. The present invention relates to an adsorption trap cleaning apparatus for odor and VOC analysis which completely desorbs residual gaseous substances remaining in the gas.

As is well known, a method of measuring the amount of adsorption of various gases contained in the atmosphere by using an adsorbent includes a volume method of determining the amount of adsorption by measuring pressure, temperature and volume during adsorption, and a weight before and after gas adsorption of the adsorbent. Gravimetric method for measuring the change with a precise balance, and flow column method for obtaining the adsorption amount by integrating the breakdown curve by measuring the concentration change at the outlet after passing a mixed gas of a certain concentration through the reactor filled with the adsorbent.

Currently, gas chromatography (Gas Chromatography, hereinafter abbreviated as 'GC') is used to analyze volatile organic compounds.The sample is collected by injecting a certain amount of the sample into the GC. In this case, since the sample is highly volatile, a liquefied concentrated sample injection method in which the sample is liquefied and concentrated by using inert liquid nitrogen or liquid argon, and the gas sample is collected in a solid adsorption tube without liquefied concentration. The so-called thermal desorption method which directly injects GC while applying heat to an adsorption tube is used.

However, the liquefied concentrated sample injection method is disadvantageous because it requires expensive liquefied concentrated equipment, and the conventional thermal desorption method, regardless of the rapid heating of the sample in the process of temperature-desorption and desorption of the sample in the collecting tube, Since the desorption of the sample is not constant, residual gaseous substances remain in the collecting tube. Therefore, there is a problem that the sample collecting tube (adsorption trap) cannot be recycled because a small amount of the previous sample remains in the sample collecting tube (adsorption trap).

In addition, when helium gas or nitrogen gas is blown into the opening of one end of the adsorption trap, the adsorbent (a kind of activated carbon) formed inside the adsorption trap is scattered, and thus there is a problem that it cannot be recycled.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described prior art, and by applying helium or nitrogen gas at an appropriate pressure to an adsorption trap for a predetermined temperature and time, it is possible to completely desorb the residual gaseous material remaining inside the adsorption trap. The purpose is to provide an adsorption trap cleaning device for odor and VOC analysis.

In order to achieve the above object, according to a preferred embodiment of the present invention, in the adsorption trap for trapping the malodor and VOC in the atmosphere while containing a certain amount of adsorbent therein for analyzing the malodor and VOC, Key setting means for generating a key setting signal for turning on the power and setting the driving time, determining the individual drive of the thermal desorption means, setting the flow rate, and the like; Heat desorption means having a plurality of heating wires provided therein and inserting the adsorption traps therein to thermally desorb the samples remaining in the adsorption traps through the heating wires; Moving means configured on a lower surface of the heat desorption means for moving the heat desorption means to a predetermined position; Moving gas storage means for storing helium gas or nitrogen gas therein and taking out the residual sample activated in the adsorption trap by using the moving gas; The flow rate adjusting means for adjusting the flow rate of the moving gas in the middle of the moving gas storage means and the heat desorption means; The power supply is controlled to the heating wire of the thermal desorption means so that the adsorption trap is thermally desorbed during the set driving time from the key setting means, and the flow rate adjusting means and the moving gas storage means are controlled so that a gas having a predetermined pressure is applied to the suction trap. Adsorption trap cleaning apparatus for odor and VOC analysis is provided so as to be introduced into one end, characterized in that the control means provided with a timer therein.

Preferably, the thermal desorption means is a odor and VOC characterized in that a plurality of insertion holes are formed through which the adsorption trap is inserted, the heating wire is wound so that power can be individually supplied to the inner circumference of the insertion hole An analytical adsorption trap cleaning device is provided.

More preferably, the moving means includes a pinion screwed to the bottom surface of the thermal desorption apparatus, a rack mounted on the lower support board and coupled to the pinion, and a step motor mounted to the support board and axially coupled to the rack. Adsorption trap cleaning apparatus for odor and VOC analysis is provided, characterized in that configured.

In addition, between the moving gas storage means and the heat desorption means odor and VOC is characterized in that a plurality of control valves are individually switched by the control means to inject the moving gas to one end of the adsorption trap individually An analytical adsorption trap cleaning device is provided.

Preferably, the adsorption trap cleaning apparatus for odor and VOC analysis further comprises a plurality of switching means for driving the heating wire and the control valve separately.

On the other hand, between the one end of the adsorption trap and the control valve guides the moving gas, the guide tube which can be coupled to the one end of the adsorption trap by the fitting member provided at one end is mediated odor and VOC An analytical adsorption trap cleaning device is provided.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail with reference to drawings.

1 is a perspective view showing the appearance of the odor and adsorption trap cleaning apparatus for VOC analysis according to an embodiment of the present invention, Figure 2 is a configuration of the adsorption trap cleaning apparatus for odor and VOC analysis according to an embodiment of the present invention It is a schematic diagram showing.

Referring to this, the adsorption trap cleaning apparatus 100 according to an embodiment of the present invention is largely composed of a key setting means, a thermal desorption means, a moving means, a flow rate adjusting means.

The key setting means is a means for supplying power to the adsorption cleaning apparatus 100 and setting a driving time, determining individual driving of the heat desorption means, setting a flow rate, and the like. This can be driven.

In addition, the moving means is a configuration for moving the high temperature thermal desorption means in one direction, and the flow rate adjusting means is a configuration for applying an appropriate flow rate for desorbing the sample remaining therein without scattering the adsorbent in the adsorption trap.

Referring to the drawings in more detail, the adsorption trap cleaning apparatus 100 is configured on the support board 300, the movement is configured on one side of the support board 300 and filled with helium or nitrogen gas therein A gas tank 2 is provided. Helium or nitrogen gas in the mobile gas tank 2 is for depressurizing and desorbing a sample blown from one end of the adsorption trap 110 and remaining therein.

In addition, it is provided at the front end of the mobile gas tank (2), the pressure control unit (see Fig. 2) for suctioning the pressure of the helium or nitrogen gas of a constant pressure to the suction trap 110 side by primary pressure control. The gas is configured to be input to the lower end of the mass flow controller (MFC) 8 via the first guide tube 6. At this time, the flow controller 8 is configured to adjust the flow rate for the gas while detecting the flow rate of the bar, the gas input therein is drawn through the upper end through the second distribution pipe 10 through the gas distribution tube It is drawn into one end of (12).

A plurality of outlet holes are formed on the outer circumferential side of the gas distribution tube 12, and the third guide tube 14 is coupled to the outlet holes, respectively, and the other end of the third guide tube 14 is a control valve composed of a solenoid valve ( Respectively). Therefore, the inflow and shut off of the gas through the third guide pipe 14 is determined by switching the control valve 16.

In addition, one end of the fourth guide tube 22 made of a flexible material is coupled to the other end of the control valve 16, and the fourth guide tube 22 is formed by the first and second support panels 20 and 24. Supported. In this case, the support panels 20 and 24 have a plurality of through holes each formed in a vertical direction with five through holes, but the number of through holes may be changed.

On the other hand, the tip portion of the fourth guide tube 22 is provided with a fitting member 26 for fitting the one end of the adsorption trap 110 is provided with an O-ring (O-ring) heat-treated inside the alloy. In addition, a plurality of through holes 32 are formed in a predetermined portion of the upper surface of the support board 300 so as to insert a plurality of adsorption traps 110 therein, and each through hole for thermally desorbing the adsorption traps 110. A thermal desorption apparatus 30 is provided in which a heating wire (see FIG. 4) is wound around the inner circumference of 32.

The lower surface of the thermal desorption apparatus 30 is equipped with a moving means, the high temperature thermal desorption apparatus 30 is moved by the moving means. That is, the suction trap 110 is mounted to one end of the fourth guide tube 22 by the fitting member 26, and then the preheated heat desorption device 30 is moved by the moving means, so that the suction trap 110 To be inserted through the insertion hole of the thermal desorption apparatus (30). This is described in more detail with reference to FIG. 3.

Next, a control box 200 is formed at a predetermined upper surface of the support board 300, and the control box 200 has a power operation button 204 (power control unit) for manipulating power input separately. A drive operation button 206 (drive operation unit) for simultaneously driving the heating wire and the control valve 16, a time setting unit 206 for setting the drive time, and an LED 208 are formed inside the microcontroller ( Illustration is omitted). The control box 200 individually drives the heating wire and the control valve 16 provided inside the thermal desorption apparatus 30 to minimize the power consumption of the remaining sample even for a small number of adsorption traps 110. Make it easy to remove.

In addition, the control box 200 may clean the adsorption trap 110 unattended as the operator sets the driving time through the timer, and the heating wire and control so that the moving gas is blown after sufficient preheating during the time setting Each of the valves 16 can be driven separately.

On the other hand, the power is supplied to the thermal desorption apparatus 30 through the cable 42 connected to the rear end of the control box 200, the power distribution unit 40 is configured in the middle. The power distribution unit 40 is composed of a plurality of wires and is directly connected to the heating wire. Therefore, power applied through the cable 42 is input to the heating wire individually.

Reference numeral 18, not shown, indicates a signal line for transmitting a signal for controlling the control valve 16 from the control box 200.

Figure 3 is an exploded perspective view showing the moving means of the thermal desorption member in the adsorption trap cleaning apparatus for odor and VOC analysis according to an embodiment of the present invention.

Referring to this, a pinion 34 in which a screw line 35 is laid is screwed into a lower portion of the thermal desorption apparatus 30, and a rack 36 is axially coupled to a shaft of a lower surface of the support board 300. The motor 38 is attached. This is a configuration for moving the high temperature thermal desorption apparatus 30 requiring preheating safely and accurately in one direction upon completion of preheating.

At this time, the step motor 38 is returned to the initial position when the thermal desorption is completed as a motor that can be rotated forward and backward.

Figure 4 is a view showing the configuration of the heating wire of the thermal desorption member in the adsorption trap cleaning apparatus for odor and VOC analysis according to an embodiment of the present invention.

Referring to this, a plurality of insertion holes 32 into which the adsorption trap 110 is inserted in the horizontal direction are formed in a plurality of layers inside the thermal desorption apparatus 30, and an absorption trap is formed at an inner circumference of the insertion hole 32. The heating wire 46 for applying heat to the 110 is individually wound for each insertion hole 32, the heating wire 46 is connected to the terminal of the power distribution unit 40 through the respective individual wire 44, respectively. . At this time, the rising temperature through the heating wire 46 is preferably 250 ℃ to 300 ℃.

Figure 5 is a block diagram showing the circuit configuration of the adsorption trap cleaning apparatus for odor and VOC analysis according to an embodiment of the present invention.

First, the description of reference numerals previously described with reference to FIGS. 1 to 4 will be omitted. The control box 200 is configured with a control unit 500 for controlling the overall circuit of the adsorption trap cleaning apparatus 100, the timer 502 is configured inside the control unit 500.

In addition, the transistors 504a to 504n and the relay switches 506a to 506n that are switched according to the control signal from the control unit 500 include the control unit 500, the solenoid valves 16a to 16n (the control valve of FIG. 1) and the heating wire. It is mediated between (46a-46n). At this time, the transistors 504a to 504n and the relay switches 506a to 506n may be simultaneously connected to the solenoid valves 16a to 16n and the heating wires 46a to 46n, and each of the solenoid valves 16a to 16n and the heating wire 46a may be connected to each other. To 46n), respectively.

That is, due to the switching of the transistors 504a to 504n and the relay switches 506a to 506n, the solenoid valves 16a to 16n and the heating wires 46a to 46n may be driven simultaneously, respectively. It may be.

In addition, a pressure control driver for driving the pressure regulator 4 is configured, the LED driver 210 for driving the LED 208, and the step motor driver 382 for driving the step motor 38. Are each provided.

Therefore, the control unit 500 couples the adsorption trap 110 to the decompression member 26, and then sufficiently preheats the thermal desorption device 30, and then the adsorption trap 110 is accurately inserted into the thermal desorption device 30. It can be moved to be inserted.

In addition, the controller 500 may minimize power consumption when cleaning the samples remaining inside the few adsorption traps 110 by individually controlling the plurality of solenoid valves 16a to 16n.

When the cleaning time set in advance by the operator arrives, the control unit 500 automatically cuts off the power supplied to the heating wires 46a to 46n and stops the driving of the pressure adjusting unit 4. In addition, the predetermined flow rate is controlled to be introduced into the suction trap 110 through the feedback of the flow rate sensing and pressure control unit through the flow rate controller (8).

With reference to the accompanying drawings, the function and action of the adsorption trap cleaning device for odor and VOC analysis according to an embodiment of the present invention having the above configuration will be described in detail.

First, the operator operates the power supply operation unit 204 to input power to the device side, and then sets the driving time in advance through the time setting unit 206, and couples the suction trap 110 to the fitting member 26. . In this case, only one or two suction traps 110 may be individually cleaned.

Then, the thermal desorption apparatus 30 is driven for a predetermined time by driving the driving manipulator 202 so that power is supplied to the heating element 46 of the thermal desorption apparatus 30 according to the position of the suction trap 110 to be cleaned. Preheat.

When the preheating of the thermal desorption apparatus 30 is completed, the thermal desorption apparatus 30 is moved so that the adsorption trap 110 can be fitted through the insertion hole 32 of the thermal desorption apparatus 30.

In addition, when the suction trap 110 is correctly inserted into the thermal desorption device 30, only the solenoid valves 16a to 16n are switched to blow helium or nitrogen gas into the suction trap 110, and pressure control is performed. The unit 4 is driven to allow the gas in the mobile gas tank 2 to be blown into one end of the suction trap 110.

At this time, due to the heating of the heating wire 46 configured in the thermal desorption apparatus 30, the odor and VOC remaining inside the adsorption trap 110 is thermally desorbed, the molecular activation state, from one end of the adsorption trap 110 The odor and VOCs are transported to the other end by the gas blown to be cleaned.

In addition, the thermal desorption drive is continuously performed for a predetermined time set by the operator, and when the end point of the corresponding setting drive arrives, the control unit 500 cuts off power to the heating wire 46 and the pressure adjusting unit 4. The driving of the valve is stopped, and the solenoid valves 16a to 16n can be in a closed state, which is an initial state. Accordingly, the present odor and VOC adsorption trap cleaning apparatus is an unmanned device, and the operator can automatically drive the adsorption trap for a predetermined time while executing an analysis experiment on other odors and VOCs.

On the other hand, adsorption trap cleaning apparatus for odor and VOC analysis according to an embodiment of the present invention is not limited to the above embodiments, but various modifications can be made without departing from the technical gist of the invention.

As described above, the adsorption trap cleaning apparatus for odor and VOC analysis according to the present invention can be reused again by completely cleaning the remaining gaseous substances in the adsorption trap used for analyzing the odor and VOC, respectively. And since the adsorption trap can be cleaned at the same time, very economical, by moving the high-temperature heat desorption device automatically has the effect of reducing the risk of safety accidents at work.

Claims (6)

In the adsorption trap for trapping the odor and VOC in the air while containing a certain amount of adsorbent therein to analyze the odor and VOC, Key setting means for generating a key setting signal for supplying power to the apparatus and setting a drive time, determining individual drive of the heat detachable means, setting a flow rate, and the like; Heat desorption means having a plurality of heating wires provided therein, and inserting the adsorption traps therein to thermally desorb the gaseous substances remaining in the adsorption traps through the heating wires; Moving means configured on a lower surface of the heat desorption means for moving the heat desorption means to a predetermined position; Moving gas storage means for storing helium gas or nitrogen gas therein and taking out the remaining gaseous substance activated in the adsorption trap by using the moving gas; The flow rate adjusting means for adjusting the flow rate of the moving gas in the middle of the moving gas storage means and the heat desorption means; The power supply is controlled to the heating wire of the thermal desorption means so that the adsorption trap is thermally desorbed during the set driving time from the key setting means, and the flow rate adjusting means and the moving gas storage means are controlled so that a gas having a predetermined pressure is applied to the suction trap. Adsorption trap cleaning device for odor and VOC analysis, characterized in that it consists of a control means having a timer therein to be introduced into one end. The method of claim 1, wherein the thermal desorption means is formed with a plurality of insertion holes through which the adsorption trap is inserted, the heating wire is wound so that the power can be individually supplied to the inner periphery of the insertion hole Adsorption trap cleaning device for odor and VOC analysis. According to claim 1, The moving means is a pinion screwed to the lower surface of the thermal desorption device, a rack mounted on the lower support board and coupled to the pinion, and a step motor mounted to the support board and axially coupled to the rack Adsorption trap cleaning device for odor and VOC analysis, characterized in that consisting of. The method of claim 1, wherein a plurality of control valves are individually switched by the control means between the moving gas storage means and the heat desorption means to be able to input the moving gas to one end of the adsorption trap individually. Adsorption trap cleaning device for odor and VOC analysis. The adsorption trap cleaning apparatus according to any one of claims 1 to 4, further comprising a plurality of switching means for individually driving the heating wire and the control valve. The guide according to any one of claims 1 to 4, wherein the guide gas is guided between one end of the adsorption trap and the control valve and can be coupled to one end of the adsorption trap by a fitting member provided at the one end. Adsorption trap cleaning device for odor and VOC analysis, characterized in that the tube is mediated.

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