WO2016017849A1 - Real-time correction dust analyzer having varying measurement point - Google Patents

Abstract

The present invention relates to a real-time correction dust analyzer having a varying measurement point, and more particularly, to a real-time correction dust analyzer having a varying measurement point, which comprises: a light transmission unit (10) for irradiating incident light (I) to the measurement point (P); a light reception unit (20) for detecting reflected light (O) scattered at the measurement point (P); and a signal processing unit (30) for amplifying and converting an optical signal into an electrical signal, wherein the analyzer comprises: a rotation adaptor vertically rotated so as to correct the measurement point when measuring air contaminants passing through the interior of a chimney or a dust collector from front/rear ends thereof; a lens carrier carried in the front-rear direction to correct a focus of a collector lens according to a corrected distance of the measurement point; and an optical correction filter for precisely adjusting a specific wavelength of a laser diode by which incident light is generated when a zero point signal and a span signal are adjusted.

Description

Real-time calibration dust analyzer with variable detection points

The present invention relates to a dust analyzer for real-time calibration in which the detection point is variable, and more particularly, a rotary adapter that is rotated up and down to face the detection point when detecting the air pollutant discharged to the outside from the front and rear ends of the chimney or dust collector; In addition, the lens transfer stage moves forward and backward to correct the focus of the collector lens according to the selected detection point distance, and the optical compensation filter precisely adjusts the specific wavelength of the laser diode that generates the zero and span signals for real-time correction. The present invention relates to a dust analyzer for real-time calibration in which a detection point provided is variable.

In general, the chimney emits various dusts including discharge pollutants. As a method of measuring the amount of pollutants and dust, until 1996, the measurement personnel directly climbed to the top of the chimney to insert the sensor, and The appearance had to be measured.

However, since the measurement of the properties of the discharge pollutants and dust is dangerous and difficult, since 1996, an automatic sensor is installed directly inside the chimney, and a dust measuring device interlocked with the automatic sensor is installed on the work rail at the top of the chimney. The transfer of data on the resulting pollutant and dust properties to the central control station has begun to be used, called the telemetering system (TMS).

Recently, the importance of the atmospheric environment has emerged, and as the environmental protection law is strengthened by applying the emission allowance standard for the amount of pollutants and dust discharged from the chimney, interest in atmospheric analysis equipment is increasing.

The atmospheric analysis equipment or dust analyzer is classified into light transmission method, light scattering method and beta ray absorption method according to the measurement method, and classified into in-situ method and sampling method according to the installation method. Currently, most of the dust analyzers installed use the light transmission method and the light scattering method, In-situ method.

In addition, the light scattering method is the light transmission method has the smallest measurement accuracy or error, the insert type light scattering dust analyzer is different from the conventional light transmission dust analyzer directly transmitted through the diode laser light source located in the front end of the rod directly inserted It detects scattered light and measures the concentration of dust.

On the other hand, the in-situ measuring instrument compares and corrects the accuracy of the measuring instrument through the test gas when detecting O ₂ , SO ₂ / NO _X , but does not have the function of correcting the operation of the dust analyzer or correcting the measuring point. There is a lot of difficulty in calculating the correct correction value.

As a related art, a chimney dust measurement system applied and registered by the present applicant has been disclosed in Korean Patent Registration No. 10-0776223 (2007.11.07.).

The prior art is a power supply for supplying a predetermined level of power; A CPU (central processing unit) for generating a control signal according to a pre-installed program; Sensor unit for detecting and measuring the pollutant discharged to the chimney; A driving unit having a driving motor generating a rotational force, an air blower preventing adsorption of contaminants discharged from the chimney, and a heating line for maintaining the air blower and the CPU at room temperature; A switch unit comprising a lower presser sensor for measuring a predetermined pressure and a high-pressor sensor for measuring a higher pressure than the lower presser sensor and connected to the air blower through a hose connector; A body functioning as a skeleton for accommodating and fixing the power supply unit, the CPU, the sensor unit, the driving unit, and the switch unit; It is installed on the outside of the body, is connected to the heating line through the air blower, and comprises a filter box for filtering (Filtering) the contaminants of the air supplied to the air blower.

This conventional technology is characterized in that it is installed in a conventional chimney to partially improve the structure to reduce the length and size, thereby improving the measurement function and increase the economics.

However, the chimney dust measurement system of the prior art has a problem that the technical versatility cannot be secured because the chimney dust measurement system has to be individually designed according to the distance because there is no function to select a detection point.

In addition, the above-described prior art has an economic problem in that it is not possible to measure the dust measurement value of the desired point in the chimney additionally to build individual equipment according to the detection point of each chimney.

The present invention was created to solve the problems of the prior art as described above is an object of the present invention is provided with a rotary adapter that is rotated up and down to the detection point when the detection of air pollutants in a chimney or dust collector having various sizes It is equipped with a lens transfer stage that can be used to detect and correct the focal point of the collector lens, and can correct various detection points with one lens. The present invention provides a dust analyzer for real-time calibration in which a detection point for precisely correcting a zero signal and a span signal of a laser diode in which incident light is generated is variable.

Real-time calibration dust analyzer variable detection point according to the present invention for achieving the above object is a pipe connected to the front and rear ends of the dust collector, the inside of the housing with a flange to be coupled to the chimney discharged smoke A dust analyzer for detecting contaminants at a detection point by light scattering method, comprising: a laser diode to generate incident light irradiated to the detection point; and a laser diode provided on the front surface of the laser diode to aim the incident light to the detection point. A light emitting unit provided with an aiming lens; A fixed adapter coupled to one side of the housing to receive reflected light scattered from the detection point, a rotating adapter provided on a rear surface of the fixed adapter, rotated up and down, and provided on a rear surface of the rotating adapter and introduced through the rotating adapter A lens receiver having a collector lens for collecting the reflected light and a detector provided on a rear surface of the lens carrier for converting the reflected light collected by the collector lens into an electrical signal; A signal processing unit including an amplifier for amplifying an electric signal input through the detector and an MPU for controlling the amplifier or controlling the laser diode according to the electric signal input through the amplifier,

A light compensator is provided between the light transmitting part and the light receiving part to control the entry and exit of the zero signal and the span signal and to correct the optical response. The spherical adapter is rotated up and down to select the detection point, and the angle is adjusted. It characterized in that the dust-proof rotary ball on the top.

The rotary adapter is provided with an over-rotation preventing end inserted into the fixed adapter to prevent over-rotation of the anti-vibration rotary ball, the fixed adapter is provided with a vibration-proof ball rotary shaft for forming the central axis when the anti-vibration rotary ball rotates up and down, The anti-vibration rotary ball is provided with a rotary hole coupled to the anti-vibration rotary ball shaft to be rotated, and the anti-vibration rotary ball shaft is provided with upper and lower pieces so as to fix the vertically rotated state of the anti-vibration rotary ball.

The light compensator includes a beam splitter in which a part of the incident light passing through the collimating lens is refracted, a reflection mirror in which refracted light refracted in the beam splitter is incident and reflected back to the beam splitter, and the beam splitter And an optical member configured to block or pass the refraction light reflected by the refraction light, and to refract the refraction light passing through the rotation shutter to the surface of the detector.

A cylindrical optical correction filter is formed between the collector lens and the fixed adapter so that a reflected light scattered at a predetermined wavelength is transmitted.

The inner periphery of the lens transfer stage is provided with a rotating screw portion which is conveyed back and forth when the detector is rotated to be positioned at the focal length of the collector lens, and one side of the detector passes a zero signal and a span signal generated by the optical correction unit. Characterized by being provided with a calibration ball.

One side of the housing is characterized in that it is provided with a purge air control unit for discharging the purged air purified to be dust-proof to the high-temperature, high-pressure contaminants generated from the chimney.

The housing is provided with a port for passing the incident light and the reflected light, the port is provided with a protective shutter to protect the surface of the collector lens and the collimating lens from the contaminants of the chimney.

As described above, the real-time calibration dust analyzer having the variable detection point according to the present invention has the following effects.

First, the rotary adapter is rotated up and down so that it is possible to set the detection point formed at a specific point of the optical path of the incident light irradiated from the light transmitting unit, so that the detection of several places with a chimney having various diameters with one dust analyzer It is possible to change the measuring point in the chimney according to the needs of the user.

Second, an amplifier for amplifying the electrical signal converted by the detector and an MPU for controlling the laser diode acting as a light source are provided, so that the mechanical correction of the detection point is rotated up and down to calibrate the detection point, and the electrical correction is performed according to the input and output of the electrical signal. To analyze dust more precisely,

Third, a cylindrical optical correction filter having a band pass filter in the center is provided at the front of the collector lens so that the refracted light is scattered and transmitted, so that the optical correction for correcting the zero signal and the span signal by selecting a light source having a specific wavelength is corrected. This improves the accuracy of detection by incident and reflected light.

Fourth, the rotating screw part is moved forward and backward on the inner circumference of the lens feeder so that the detector can be moved according to the focal length of the collector lens that is changed according to the corrected detection point. It can be detected and there is an advantage in use.

1 is a front view showing the appearance of the chimney dust measurement system according to the prior art,

2 is a use state diagram illustrating the configuration of a dust analyzer formed in the same opening of the light transmitting unit and the light receiving unit according to the prior art,

Figure 3 is a state diagram showing the configuration of the dust analyzer for real-time calibration variable detection point according to the present invention,

Figure 4 is an exploded perspective view showing the light receiving portion of the dust analyzer according to the present invention,

5 is a perspective view showing an optical compensation filter of the dust analyzer according to the present invention,

Figure 6 is a side view showing a state in which the light receiving unit of the dust analyzer in accordance with the present invention,

7 is a functional diagram illustrating the action of the focal length of the dust analyzer according to the present invention.

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

The real-time calibration dust analyzer variable detection point according to the present invention is a flange (L) on one side to be coupled to the pipe (C) that is connected to the front and rear ends of the dust collecting device, or the smoke is discharged as shown in FIG. Is a dust analyzer which is recessed in the housing 50 provided with a light scattering method to detect contaminants at the detection point P, wherein the incident light I irradiated to the detection point P is generated. A light emitting part 10 provided on the front surface of the laser diode 11 and provided with an aiming lens 12 aiming the incident light I to be irradiated to the detection point P; The fixed adapter 21 is coupled to one side of the housing 50 and the reflected light (O) scattered from the detection point (P) is introduced, and the rotating adapter is provided on the back of the fixed adapter 21 and rotated up and down ( A lens transfer stage 23 provided at a rear surface of the rotary adapter 22 and provided with a collector lens 23a for collecting reflected light O introduced through the rotary adapter 22; A light receiving unit 20 provided at a rear surface of the transfer end 23 and provided with a detector 24 for converting the reflected light O collected by the collector lens 23a into an electrical signal; An amplifier 31 for amplifying the electrical signal input through the detector 24 and an MPU controlling the amplifier 31 or controlling the laser diode 11 according to the electrical signal input through the amplifier 31. Is composed of a signal processing unit 30 is provided with (32),

A light compensator 40 is provided between the light transmitter 10 and the light receiver 20 to control the entry and exit of the zero signal and the span signal and to correct the optical response. The rotation adapter 22 has the detection point. It is provided with a spherical anti-vibration rotary hole 25 is rotated up and down to select (P) to adjust the angle.

In addition, the light receiving unit 20 is directed to a point of the optical path of the incident light (I) generated by the light transmitting unit 10, which is adjusted by the rotary adapter 22, the changed in accordance with the detection point (P) The lens transfer stage 23 is provided so as to focus the collector lens 23a, and the signal processing unit may maintain the wavelength or intensity of the incident light I generated by the laser diode 11 at all times. 30). That is, the zero point signal and the span signal incident through the detector 24 are checked to be kept constant.

On the other hand, it is preferable that the lens transfer stage 23 and the rotation adapter 22 are provided with movement displacements indicating the displacement of the detection point P so that the user can easily adjust the stages.

In addition, as shown in FIG. 4, the rotation adapter 22 includes an over-rotation preventing end inserted into the fixed adapter 21 to prevent over-rotation of the dustproof rotating hole 25. 26 is provided, and the fixed adapter 21 is provided with a dustproof rotary shaft 27 to form a central axis when the dustproof rotary hole 25 is rotated up and down.

Here, the anti-vibration rotary hole 25 is provided with a rotating hole 25a coupled to the anti-vibration rotary shaft 27 to be rotated so as to rotate, and the anti-vibration rotary shaft 27 has an upper and lower sides of the anti-vibration rotary shaft 25. The upper and lower pieces 27a are provided to fix the rotated state.

On the other hand, the outer surface of the anti-vibration rotating hole 25 is closely coupled when combined with the anti-vibration opening axis 27 to prevent exposure to external dust, and very spaced apart so that the dust is easy to dust when rotating. Is preferably provided with a brush (not shown).

Also, the light compensator 40 includes a beam splitter 41 in which a part of the incident light I passing through the collimating lens 12 is refracted, and refracted light R refracted in the beam splitter 41. ) Is a reflection mirror 42 which is incident and reflects back to the beam splitter 41, a rotating shutter 43 for blocking or passing the refracted light R reflected by the beam splitter 41, It consists of an optical member 44 for refracting the refracted light (R) passing through the rotary shutter 43 to the surface of the detector 24.

Here, the beam splitter 41 is a device that prevents incident light having a specific wavelength from being refracted and absorbed by an external device.

The optical beam compensator 40 performs a calibration operation according to a pre-programmed time and order to minimize the error by correcting the measured value from the error due to aging of the pollutant or equipment.

The rotary shutter 43 is driven by the solenoid motor M, and controls the passage of the zero signal and the span signal incident on the rear surface of the collector lens 23a to sense the light source detected by the detector 24. It acts as a passage for signaling.

In addition, between the collector lens 23a and the fixed adapter 21, as shown in FIG. 5, a cylindrical optical correction in which a band pass filter 45a is formed at the center so that the reflected light O scattered at a predetermined wavelength is transmitted. A filter 45 is provided.

Here, the optical compensation filter 45 increases the accuracy of correction by transmitting only the light having a specific wavelength after the refraction light R is scattered by the protection shutter 53 according to the zero signal or the spam signal. In addition, it is preferable that a filter (not shown) is provided in a hole outside the band pass filter 45a to transmit scattered light having a different wavelength so that various optical experiments can be performed.

In addition, at the inner circumference of the lens transfer stage 23, a rotating screw part 23b is provided which is moved forward and backward when the detector 24 is rotated to be positioned at the focal length of the collector lens 23a, and the detector 24 is provided. One side of the) is provided with a calibration hole 24a through which a zero signal and a span signal generated by the optical compensator 40 are passed.

In addition, one side of the housing 50 is provided with a purge air control unit 51 for discharging the purge air (A) purified to dust-proof high-temperature, high-pressure contaminants generated from the chimney.

Herein, the chimney has contaminants of high temperature and high pressure therein, and the purge air controller 51 operates to prevent the contaminants from penetrating into the dust analyzer due to the pressure difference. It has the effect of removing the dust inside the dust analyzer, so that the error of the measured value is minimized so that the measurement is closest to the actual value, the temperature inside the analyzer is lowered, and it is protected from contamination.

In addition, the housing 50 is provided with a port 52 through which the incident light I and the reflected light O pass, and the port 52 has the collector lens 23a and the aiming lens from contaminants in the chimney. The protective shutter 53 which protects the surface of 12 is provided.

Here, the protective shutter 53 blocks direct exposure to the chimney with many pollutants when there is no detection, which is preferably provided to extend the life of the air purification filter used in the purge air control unit 51.

Looking at the operation of the real-time calibration dust analyzer for changing the detection point according to the present invention made as described above as follows.

The real-time calibration dust analyzer having a variable detection point of the present invention is inserted into the housing 50 coupled to the dust collector or the bend as shown in FIG. 3, and irradiates incident light I to the detection point P. To the light transmitting unit 10, the light receiving unit 20 for detecting the reflected light O scattered at the detection point P, and a signal processing unit 30 for amplifying and processing the electric signal in which the optical signal is modulated. It's done,

As shown in FIG. 6, the light receiving unit 20 is connected to a fixed adapter 21 to adjust the detection point P so that the angle is adjusted up and down, and the collector lens 23a. The lens transfer stage 23 which adjusts the distance of the detector 24 to focus is provided, so that the detection point P of the dust collector or the bend can be selected and detected.

That is, the rotation adapter 22 is rotated up and down by adjusting the input angle of the reflected light (O) aimed at the optical path of the incident light (I) by adjusting the detection distance (P), the lens transfer stage 23 ) Moves forward and backward to match the focal length of the collector lens 23a.

Here, the collector lens 23a is provided with a convex lens as shown in FIG. 7 so that its focal length is changed. That is, in the case of the point B where the detection distance is close, the focal length becomes farther to form an image at the point B ', and the distance between the collector lens 23a and the detector 24 should be far, and the detection point P In the case of point A, which is the farthest distance, the focal length becomes close to form an image at point A '. Therefore, in the case of point A, the collector lens 23a and the detector 24 should be formed closely.

On the other hand, the dust analyzer of the present invention is provided between the light transmitting unit 10 and the light receiving unit 20 is provided with a light compensator 40 is to generate a zero signal and the span signal to be corrected based on the optical response.

At this time, part of the incident light I transmitted from the light transmitting part 10 is refracted by the beam splitter 41 and is incident to the reflection mirror 42. The reflection mirror 42 again injects the refracted light R to the beam splitter 41, and the refracted light R incident to the beam splitter 41 is rotated by the rotating shutter 43. When closed, it acts as a zero signal, and when the rotary shutter 43 is opened, it acts as a span signal.

The refractive light R passing through the rotating shutter 43 is refracted by the optical member 44 in front of the detector 24 and scattered in the protective shutter 53. The detector 24 detects and corrects the refracted light R scattered by the protective shutter 53.

That is, the refractive light R is refracted by the optical member 44, and the light scattered by the protective shutter 53 passes through the band pass filter 45a of the optical compensation filter 45 to detect the detector 24. Will be detected. In this case, the band pass filter 45a transmits only light having a predetermined wavelength, thereby enabling more precise calibration.

Meanwhile, the detector 24 modulates the detected optical signal into an electrical signal and transmits the detected optical signal to the amplifier 31, and the amplifier 31 amplifies the modulated electrical signal and sends it to the MPU 32.

At this time, the MPU 32 is to measure the air pollution of the chimney or dust collector by correcting the default value of the laser diode 11 and the detector 24 according to the amplified electric signal.

On the other hand, the rotary adapter 22 is provided with a spherical anti-vibration rotary ball 25 to be rotated up and down, and the anti-vibration ball rotary shaft 27 to form a central axis when the anti-vibration rotary ball 25 is rotated up and down, Rotator 25 is rotated to adjust the detection point (P).

In addition, one side of the anti-vibration rotation hole 25 is provided with an over-rotation prevention stage 26 to protrude forward to prevent over-rotation so as not to exceed the maximum angle at which the reflected light O scattered from the detection point P flows. It will be adjusted.

On the other hand, the rotating screw portion 23b provided on the inner circumference of the lens transfer stage 23 is moved forward and backward as the lens transfer stage 23 is rotated, which is the detector 24 is the collector lens 23a Adjust the position to the focal length of.

In addition, the purge air control unit 51 provided at one side of the housing 50 prevents contaminants from penetrating into the housing 50 from the chimney with a lot of high temperature and high pressure contaminants. To this end, the purge air controller 51 maintains a constant pressure on the purified purge air A to prevent dust from penetrating into the surfaces of the collector lens 23a and the aiming lens 12 regardless of the housing 50. ) Maintain inside pressure to be negative.

At this time, the program is set to automatically close the protection shutter 53 to protect the optical device from the chimney when the supply of the purge air (A) is interrupted or other equipment abnormalities occur.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (7)

1. Light pipes connected to the front and rear ends of the dust collector or the inside of the housing 50 provided with the flange L on one side to be coupled to the chimney C from which the smoke is discharged to scatter contaminants at the detection point P. In the dust analyzer to detect by law,

   A laser diode 11 generating incident light I irradiated to the detection point P and a front surface of the laser diode 11 are provided so that the incident light I is irradiated to the detection point P. A light emitting unit 10 having a collimation lens 12;

   The fixed adapter 21 is coupled to one side of the housing 50 and the reflected light (O) scattered from the detection point (P) is introduced, and the rotating adapter is provided on the back of the fixed adapter 21 and rotated up and down ( A lens transfer stage 23 provided at a rear surface of the rotary adapter 22 and provided with a collector lens 23a for collecting reflected light O introduced through the rotary adapter 22; A light receiving unit 20 provided at a rear surface of the transfer end 23 and provided with a detector 24 for converting the reflected light O collected by the collector lens 23a into an electrical signal;

   An amplifier 31 for amplifying the electrical signal input through the detector 24 and an MPU controlling the amplifier 31 or controlling the laser diode 11 according to the electrical signal input through the amplifier 31. Is composed of a signal processing unit 30 is provided with (32),

   Between the light transmitting unit 10 and the light receiving unit 20 is provided with a light correction unit 40 for controlling the entry and exit of the zero signal and the span signal to correct the optical response,

   The rotary adapter 22 is a dust analyzer for real-time calibration, characterized in that the detection point is variable, characterized in that it is provided with a spherical dust-proof rotary hole 25 is rotated up and down to select the detection point (P) to adjust the angle.
2. The method of claim 1,

   The rotary adapter 22 is provided with an over-rotation prevention stage 26 inserted into the fixed adapter 21 to prevent over-rotation of the dust-proof rotating hole 25,

   The fixed adapter 21 is provided with a dustproof rotary shaft 27 to form a central axis when the dustproof rotary hole 25 is rotated up and down,

   The anti-vibration rotary hole 25 is provided with a rotary hole (25a) coupled to the anti-vibration rotary shaft 27 and perforated to rotate,

   The dust analyzer for the real-time calibration of the variable dust detection point is characterized in that the upper and lower pieces (27a) is provided to fix the up-and-down rotation of the anti-vibration rotary ball 25 in the anti-vibration ball rotating shaft (27).
3. The method of claim 1,

   The optical beam unit 40 is

   The beam splitter 41 in which a part of the incident light I passing through the collimating lens 12 is refracted, and the refracted light R refracted in the beam splitter 41 are incident to the beam splitter ( 41 passes through the reflection mirror 42 reflecting back to the light, the rotating shutter 43 for blocking or passing the refracted light R reflected by the beam splitter 41, and the rotating shutter 43. The dust analyzer for real-time calibration variable detection point, characterized in that consisting of an optical member (44) for refracting the refractive light (R) to the surface of the detector (24).
4. The method of claim 3,

   Between the collector lens 23a and the fixed adapter 21 is provided a cylindrical optical correction filter 45 having a band pass filter 45a formed at the center to transmit reflected light O scattered at a predetermined wavelength. Real-time calibration dust analyzer with variable detection points.
5. The method of claim 1,

   On the inner circumference of the lens transfer stage 23 is provided with a rotating screw portion 23b which is conveyed back and forth when the detector 24 is rotated to be positioned at the focal length of the collector lens 23a.

   One side of the detector 24 is provided with a calibration hole 24a through which a zero signal and a span signal generated by the optical compensator 40 are passed.
6. The method of claim 1,

   One side of the housing 50 is the detection point is variable, characterized in that provided with a purge air control unit 51 for discharging the purged air (A) purified to dust-proof high-temperature high-pressure contaminants generated from the chimney Real time calibration dust analyzer.
7. The method of claim 1,

   The housing 50 is provided with a port 52 so that the incident light I and the reflected light O pass therethrough,

   The port 52 is provided with a protective shutter 53 which protects the surfaces of the collector lens 23a and the aiming lens 12 from contaminants in the chimney. Analyzer.

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