KR20210010766A - Apparatus for diluting exhaust gas - Google Patents

Abstract

An embodiment of the present invention provides an exhaust gas dilution device capable of increasing measurement accuracy. The exhaust gas dilution device includes a head unit, an ejector unit, a nozzle unit, a dilution unit preheating unit, and a cleaning fluid supply unit. Exhaust gas flows from the outside into the head unit to move. The ejector unit is coupled to a front end of the head unit, and guides primary dilution air to flow from the outside and move. The nozzle unit increases the flow rate of the primary dilution air moving from the ejector unit such that the exhaust gas flowing into the head unit is induced to be ejected to the front of the ejector unit. The dilution unit is coupled to the front end of the ejector unit, and mixes primary dilution gas, which is generated by mixing the exhaust gas with the primary dilution air and then discharged, with secondary dilution air introduced from the outside to generate secondary dilution gas. The preheating unit is provided at a rear end of the head unit, and preheats the exhaust gas flowing into the head unit. The cleaning fluid supply unit is provided between the head unit and the preheating unit, and supplies a cleaning fluid in the direction of the head unit and the preheating unit.

Description

Exhaust gas dilution device{APPARATUS FOR DILUTING EXHAUST GAS}

The present invention relates to an exhaust gas dilution device, and more particularly, to an exhaust gas dilution device capable of increasing measurement accuracy.

When the concentration of the sampled particles exceeds the measurement range of the particle counter, the particle dilution device is installed at the front end of the particle counter, dilutes the sampled particles at a certain dilution ratio, and transfers them to the particle counter to measure even high-concentration sampling particles. It is a device that allows you to do it.

In general, a particle dilution device includes a mixing chamber in which a gas to be measured is introduced and firstly mixed with dilution air to generate a first dilution gas, and an ejector that secondarily mixes dilution air with the first dilution gas and delivers it to a particle counter. Includes.

However, in such a conventional particle dilution apparatus, a problem may occur in measurement accuracy because many particles are lost due to adhesion of the particles to be measured to the inner surface of the mixing chamber. That is, the particle counter measures the particle concentration of the diluted dilution gas and converts the concentration of the particles to be measured based on this. When loss of particles occurs in the mixing chamber, the particles contained in the dilution gas supplied to the particle counter Since the number of is already small, the concentration of the particles converted based on this has a difference from the concentration of the actual measurement target particle.

In addition, since a large amount of dilution gas diluted in the mixing chamber must be sucked into the ejector, a large amount of high-pressure air is required in the ejector. Accordingly, there is a problem in that a configuration of a compressor for supplying air to the ejector at high pressure must be added.

In addition, when foreign substances such as moisture are included in the dilution gas supplied to the particle counter, and these are repeatedly attached and removed on the inner surface of the flow path, measurement accuracy in the particle counter may be deteriorated.

Republic of Korea Patent Publication No. 2013-0059592 (published on June 7, 2013)

In order to solve the above problems, a technical problem to be achieved by the present invention is to provide an exhaust gas dilution device capable of increasing measurement accuracy.

The technical problem to be achieved by the present invention is not limited to the technical problems mentioned above, and other technical problems that are not mentioned can be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. There will be.

In order to achieve the above technical problem, an embodiment of the present invention is a head portion to be moved by the exhaust gas from the outside; An ejector unit coupled to the front end of the head unit and guiding the primary dilution air to be introduced and moved from the outside; A nozzle unit for inducing the exhaust gas flowing into the head unit to be ejected forward of the ejector unit by increasing the flow velocity of the primary dilution air moving from the ejector unit; It is coupled to the front end of the ejector unit, and the first dilution gas is generated by mixing the exhaust gas and the primary dilution air in the ejector unit, and then the discharged primary dilution gas is mixed with the secondary dilution air introduced from the outside to produce a secondary dilution gas. A dilution part to be generated; A preheating unit provided at a rear end of the head unit and preheating the exhaust gas flowing into the head unit; And a washing fluid supply unit provided between the head unit and the preheating unit and supplying a cleaning fluid to the head unit and the preheating unit.

In an embodiment of the present invention, the cleaning fluid supply unit includes a compression unit for compressing and spraying the cleaning fluid, a drying unit provided at a front end of the compression unit, and a drying unit configured to dry the cleaning fluid, and a front end of the drying unit And, a filter unit that removes foreign substances from the cleaning fluid, and is provided between the head unit and the preheating unit, and guides a part of the cleaning fluid moving through the filter unit to the head unit, and It may have an adapter part guiding the rest to the preheating part.

In an embodiment of the present invention, the preheating unit preheats the exhaust gas to a temperature of 190°C to 210°C, and the first dilution air is 150°C to 250°C so that the first dilution gas is generated by a high-temperature dilution method. It is supplied at a temperature, and the secondary dilution air may be supplied at a temperature of 10°C to 30°C so that the secondary dilution gas is generated by a room temperature dilution method.

In an exemplary embodiment of the present invention, a separation unit provided at the rear end of the preheating unit may include a separation unit configured to separate a group of target particles less than a predetermined size from the exhaust gas introduced from the outside and guide the cyclone to the preheating unit.

In an embodiment of the present invention, it may include a measuring unit that is coupled to the front end of the dilution unit and measures particle information of the secondary dilution gas.

In an exemplary embodiment of the present invention, the measurement unit includes an injection unit for sequentially injecting particles included in the secondary dilution gas one by one, and a light source for irradiating light in a direction crossing the injection path of the particles injected from the injection unit. And, a light receiving unit provided on one side of the injection path and receiving light scattered by the particles injected from the injection unit after being irradiated from the light source, and based on the light information generated by the light receiving unit, the secondary It may have a calculation unit that calculates the size information of the particles included in the dilution gas.

In an embodiment of the present invention, the head portion has a space portion through which the exhaust gas is introduced, and a through hole formed through a central axis direction and connected to the space portion, and the ejector portion is formed through the central axis direction. It has a first discharge hole connected to the through hole and a first inlet for guiding the first dilution air to the first discharge hole, and the first discharge hole is formed at a rear end of the ejector part and connected to the first inlet. A suction part, an acceleration part formed at a front end of the suction part, and a diffusion part formed at a front end of the acceleration part may be provided.

In an embodiment of the present invention, the nozzle portion is formed at a front end of the connection portion, a flange portion coupled to the inner surface of the space portion, a connection portion connected to the flange portion and provided inside the through hole and the suction portion, and A nozzle tip portion may have an outer diameter corresponding to an inner diameter of the acceleration portion and inserted into the acceleration portion.

In an embodiment of the present invention, the nozzle tip part may have a first discharge passage through which the primary dilution air introduced into the suction part is discharged to the diffusion part on the outer circumferential surface.

In an embodiment of the present invention, the acceleration unit may have a second discharge passage through which the primary dilution air introduced into the suction unit is discharged to the diffusion unit on an inner circumferential surface.

According to an embodiment of the present invention, effective decompression can be achieved in the diffusion portion by the first dilution air moving at high speed through the first discharge passage, and thus exhaust gas can be smoothly moved through the nozzle portion, There is an advantage that compressed air for moving the exhaust gas is unnecessary.

In addition, according to an embodiment of the present invention, since the secondary dilution air is introduced in the direction of the center of the first flow passage through the through holes formed in the first flow passage, the number of exhaust gas particles adhered to the inner circumferential surface of the first flow passage decreases. Can be. In addition, when the secondary dilution air flows into the first flow passage through the through hole, exhaust gas particles adhered to the inner circumferential surface of the first flow passage may fall off. Accordingly, it is possible to effectively improve the occurrence of particle loss while the exhaust gas becomes the secondary dilution gas.

In addition, according to an embodiment of the present invention, the exhaust gas is firstly diluted in the ejector unit and secondarily diluted in the dilution unit, so that the dilution rate can be increased.

In addition, according to an embodiment of the present invention, after the exhaust gas is preheated in the preheating unit, it is mixed with high-temperature primary dilution air to be diluted at high temperature, and then mixed with secondary dilution air at room temperature to be diluted at room temperature. Water in the inside can be prevented from becoming droplets, and through this, the measurement accuracy of the particles can be improved.

In addition, according to an embodiment of the present invention, a cleaning fluid supply part is provided between the head part and the preheating part, and the cleaning fluid is supplied to the head part and the preheating part at the same time, thereby effectively cleaning the interior of the exhaust gas dilution device. I can. In particular, the cleaning fluid supply unit is relatively connected to the rear end of the exhaust gas dilution device, so that a sufficient distance between the supplied cleaning fluid and the measurement unit can be secured. Through this, the cleaning fluid flows into the measurement unit and disturbs the measurement unit. Problems that may occur can be prevented.

In addition, according to an embodiment of the present invention, since a separation unit is provided at the rear end of the preheating unit so that a specific target particle group can be separated and moved by a cyclone from the exhaust gas, the measurement unit can calculate particle information for the target particle group. have.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be deduced from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a perspective view showing an exhaust gas dilution apparatus according to a first embodiment of the present invention.
2 is a cross-sectional view of an exhaust gas dilution apparatus according to a first embodiment of the present invention.
3 is an exploded cross-sectional view showing the nozzle portion of the exhaust gas dilution device according to the first embodiment of the present invention.
4 is a graph for explaining the effect of the dilution temperature in the exhaust gas dilution apparatus according to the first embodiment of the present invention.
5 is a perspective view showing a nozzle part of an exhaust gas dilution apparatus according to a first embodiment of the present invention.
6 is an exploded cross-sectional view showing a nozzle portion of an exhaust gas dilution apparatus according to a second embodiment of the present invention.
7 is an exemplary view showing the cleaning fluid supply unit of FIG. 1.
8 is a configuration diagram showing the measurement unit of FIG. 1.
9 is an exemplary view showing an operation example of the separation unit of FIG. 1.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be implemented in various different forms, and therefore is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part is said to be “connected (connected, contacted, bonded)” to another part, it is not only “directly connected”, but also “indirectly connected” with another member in the middle. This includes cases where there is "". In addition, when a part "includes" a certain component, this means that other components may be further provided, not excluding other components unless otherwise specified.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

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

1 is a perspective view showing an exhaust gas dilution apparatus according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of an exhaust gas dilution apparatus according to a first embodiment of the present invention, and FIG. 3 is a first embodiment of the present invention. It is an exploded cross-sectional view showing a nozzle part of an exhaust gas dilution device according to an example.

As shown in FIGS. 1 to 3, the exhaust gas dilution device includes a head part 100, an ejector part 200, a nozzle part 300, a dilution part 400, a preheating part 600, and a washing fluid supply part 700. ) Can be included.

In the head part 100, the exhaust gas 1 may be introduced and moved from the outside.

In addition, the ejector unit 200 may be coupled to the front end of the head unit 100, and may guide the primary dilution air 2 to be introduced and moved from the outside.

The nozzle unit 300 can increase the flow velocity of the primary dilution air 2 moving from the ejector unit 200, and through this, the exhaust gas 1 flowing into the head unit 100 is transferred to the ejector unit 200 Can be induced to erupt forward.

The dilution part 400 is coupled to the front end of the ejector part 200, and the first dilution gas discharged after the exhaust gas 1 and the primary dilution air 2 are mixed in the ejector part 200 It is mixed with the secondary dilution air (3) introduced from the secondary dilution gas can be generated.

The preheating unit 600 is provided at a rear end of the head unit 100 and may preheat the exhaust gas 1 flowing into the head unit 100.

The cleaning fluid supply unit 700 is provided between the head unit 100 and the preheating unit 600, and may supply a cleaning fluid toward the head unit 100 and the preheating unit 600.

In detail, the head part 100 may have a space part 111 through which the exhaust gas 1 is introduced, and a through hole 112 that penetrates in the central axis direction so as to be connected to the space part 111.

Hereinafter, for convenience of explanation, a front end/front end/front, a rear end/rear end/rear section will be described based on the flow direction of the exhaust gas. That is, when the exhaust gas is moved from the first point to the second point, the first point is described as the rear end/rear end/rear and the second point is the front end/front end/front.

Accordingly, the through hole 112 may be formed at the front end of the head portion 100.

In addition, a step protrusion 120 may be formed at the front end of the head portion 100. The stepped protrusion 120 may be formed along the circumferential direction.

In addition, a cover (not shown) for sealing the space 111 may be provided at the rear end of the head 100, and exhaust gas may flow into the space 111 through the cover.

In the present invention, the exhaust gas may be an example of the measurement object, and the measurement object is not necessarily limited to the exhaust gas. For example, when the measurement target is smoke from a chimney, a flow path through which a part of the smoke is absorbed may be provided in the chimney, and the smoke that moves through the flow path is the space part 111 of the head part 100 through the cover. ) Can be supplied.

The ejector part 200 may be coupled to the front end of the head part 100.

A first step groove 230 may be formed at the rear end of the ejector unit 200, and the step protrusion 120 of the head portion 100 may be inserted into the first step groove 230, through which the head The unit 100 and the ejector unit 200 may be coupled to have the same central axis.

The ejector part 200 has a first discharge hole 210 formed through the center axis to be connected to the through hole 112 and connected to the first inlet 220 for guiding the supplied primary dilution air 2. Can have.

In addition, the first discharge hole 210 may have a suction part 211, an acceleration part 212, and a diffusion part 213.

The suction part 211 may be formed at the rear end of the ejector part 200, and may be formed so that the inner diameter decreases toward the front.

The acceleration part 212 may be formed at a front end of the suction part 211 and may be connected to the suction part 211. The acceleration unit 212 may be formed to have the same inner diameter.

The diffusion part 213 may be formed at a front end of the acceleration part 212 and may be connected to the acceleration part 212. The diffusion part 213 may be formed such that the inner diameter increases toward the front.

In addition, the ejector unit 200 may have a first inlet 220. The first inlet 220 may be formed through in a radial direction, and may be connected to the suction part 211.

The first inlet 220 may guide the primary dilution air 2 supplied from the outside to the suction unit 211. A first pipe 221 guiding the inflow of the first diluted air 2 from the outside may be coupled to the first inlet 220.

The first dilution air may be hot air, and the first dilution air may be supplied at a temperature of 150°C to 250°C.

The nozzle part 300 is inserted into the first discharge hole 210 through the through hole 112, and as the primary dilution air 2 moves through the first discharge hole 210, the space part 111 It may have a second discharge hole 340 formed through the central axis direction so that the introduced exhaust gas 1 is sucked and ejected into the first discharge hole 210.

The nozzle part 300 may have a flange part 310, a connection part 320, and a nozzle tip part 330.

The flange portion 310 may be coupled to the inner surface of the space portion 111. The flange portion 310 may be coupled to the head portion 100 by a fastening member such as a bolt, and may be detached from the head portion 100.

The connection part 320 may be connected to the flange part 310 to extend forward. The connection part 320 may pass through the through hole 112 of the head part 100 and extend to the front of the head part 100, and may be provided inside the suction part 211. The connection part 320 may be formed to have a smaller diameter toward the front direction.

The nozzle tip part 330 may be formed at the front end of the connection part 320 and may be inserted into the acceleration part 212. The nozzle tip part 330 may have an outer diameter of a size corresponding to the inner diameter of the acceleration part 212.

Further, the nozzle part 300 may have a second discharge hole 340, and the second discharge hole 340 may be formed through the nozzle part 300 in the direction of the central axis. A portion of the second discharge hole 340 formed in the connection portion 320 may be formed to have an inner diameter smaller toward the front, and a portion formed in the nozzle tip portion 330 may be formed with the same inner diameter.

In addition, the nozzle tip portion 330 may have a first discharge passage 331 on the outer circumferential surface. The first discharge passage 331 may be formed spirally recessed in the outer circumferential surface of the nozzle tip portion 330 (see FIG. 5A). Accordingly, when the nozzle tip part 330 is inserted into the acceleration part 212, the suction part 211 and the diffusion part 213 may be connected by the first discharge passage 331.

The primary dilution air 2 supplied through the first inlet 220 may be introduced into the suction unit 211 and may be moved to the diffusion unit 213 through the first discharge passage 331. As the primary dilution air passes through the first discharge passage 331 of a small cross-sectional area, the flow rate increases. When the primary dilution air is discharged to the diffusion unit 213, the pressure decreases. Then, a pressure difference between the diffusion part 213 and the space part 111 occurs, and the exhaust gas of the space part 111 flows into the second discharge hole 340 and is moved to be supplied to the diffusion part 213. do. Since the first dilution air moving through the first discharge passage 331 generates a vortex in the diffusion unit 213 and a centrifugal force can be induced, the pressure at the rear end of the diffusion unit 213 may be lowered more effectively.

The angle and interval of the first discharge passage 331 may be adjusted, and through this, the flow rate and pressure of the primary dilution air can be controlled.

If the central axis of the nozzle tip part 330 does not coincide with the central axis of the acceleration part 212, the cross-sectional area of the gap between the nozzle tip part 330 and the acceleration part 212 varies depending on the position and passes The flow rate of the diluted air is also changed, and effective decompression may not be achieved at the rear end of the diffusion unit 213. Then, it may not be possible to stably move the exhaust gas through the second discharge hole 340.

However, in the present invention, since the outer diameter of the nozzle tip part 330 is formed to correspond to the inner diameter of the acceleration part 212, and the nozzle tip part 330 is closely inserted into the acceleration part 212, the nozzle tip part 330 is accelerated. It may be located on the same central axis as the part 212. Therefore, the flow rate of the primary dilution air is the same at any position between the nozzle tip part 330 and the accelerator part 212, and effective decompression is performed in the diffusion part 213 and the exhaust gas through the second discharge hole 340 Can be moved stably. Further, according to this, since the movement of the exhaust gas can be smoothly performed due to the effective depressurization of the diffusion unit 213, there is an advantage that compressed air for moving the exhaust gas is unnecessary.

The exhaust gas dilution device may further include a first adapter unit 500 and a second adapter unit 550.

The first adapter unit 500 may be coupled to a front end of the ejector unit 200.

The first adapter part 500 may have an extension and diffusion part 501 formed therethrough in the axial direction. The extended diffusion unit 501 may be formed to increase its inner diameter toward the front direction, and may be formed to be continuous with the diffusion unit 213 of the ejector unit 200.

The first adapter part 500 may have a second step groove 502 on an outer peripheral surface of the front end part.

In addition, the second adapter unit 550 may be coupled to a front end of the first adapter unit 500.

The second adapter part 550 may have a flow path hole 551 penetrating through the axial direction, and the flow path hole 551 may be connected to the extended diffusion part 501 of the first adapter part 500.

The first dilution gas generated by mixing the first dilution air flowing into the first inlet 220 and the exhaust gas supplied through the second discharge hole 340 in the diffusion unit 213 is an extended diffusion unit 501 and It can be moved through the flow path 551.

The second adapter part 550 may have a third step groove 552 on an outer peripheral surface of the front end part.

The dilution part 400 includes a first flow path part 410 through which the first dilution gas discharged after the exhaust gas 1 and the first dilution air 2 are mixed and generated in the first discharge hole 210 is introduced. , It may have a second passage portion 420 that is connected to the first passage portion 410 and guides the supplied secondary dilution air 3 to be mixed with the first diluting gas. In the dilution unit 400, the first dilution gas and the second dilution air 3 may be mixed to generate a second dilution gas.

Specifically, the dilution part 400 may be coupled to the front end of the second adapter part 550.

The dilution part 400 may have a first passage part 410 and a second passage part 420.

The rear end of the first passage part 410 may be coupled to the third step groove 552 of the second adapter part 550. The first passage part 410 may be formed to be continuous with the passage hole 551 of the second adapter part 550, and the primary dilution gas generated in the diffusion part 213 is transferred to the first passage part 410. Can be moved.

A plurality of through holes 411 may be formed through the first passage part 410.

The second passage part 420 may be provided to surround the first passage part 410 outside the first passage part 410. The rear end of the second passage part 420 may be coupled to the second step groove 502 of the first adapter part 500.

A second inlet 440 may be formed in the second passage 420, and the second inlet 440 may be formed at a front end of the outer peripheral surface of the second passage 420. The second dilution air 3 may be introduced through the second inlet 440, and a second pipe 441 for guiding the second dilution air from the outside may be connected to the second inlet 440.

Further, the dilution part 400 may have a guide wall 430.

The guide wall 430 may be provided between the first passage part 410 and the second passage part 420.

In addition, a rear end of the guide wall 430 may be spaced apart from a front end of the first adapter unit 500. Through this, the space between the first flow passage 410 and the second flow passage 420 may be partitioned mostly by the guide wall 430, and the secondary dilution air introduced through the second inlet 440 The flow length of can be lengthened. That is, the secondary dilution air introduced through the second inlet 440 is moved in the rear direction in the space between the second flow path 420 and the guide wall 430, and the guide wall 430 and the first adapter It may be moved to the space between the first flow path part 410 and the guide wall 430 through the space between the parts 500. Then, it is moved to the inside of the first flow path portion 410 through the through hole 411, and may be mixed with the first dilution gas to generate a second dilution gas.

Since a plurality of through holes 411 are formed as a whole in the first passage part 410, the area of the outer circumferential surface of the first passage part 410 is reduced. Accordingly, among the exhaust gas particles of the primary dilution gas, the number of particles that adhere to the inner circumferential surface of the first flow path unit 410 may be reduced, thereby reducing exhaust gas particle loss.

In addition, when the secondary dilution air flows in the center direction of the first flow path part 410 through the through hole 411, the exhaust gas particles adhered to the inner circumferential surface of the first flow path part 410 may come off. Accordingly, most of the particles in the exhaust gas moving in the first passage part 410 can be mixed with the secondary diluted air, and loss of particles in the process of turning the exhaust gas into the secondary diluted gas is also effectively reduced. Can be.

The exhaust gas dilution device may include a diffusion tube portion 570, a plug portion 580, and an exhaust pipe 590.

The diffusion tube part 570 may be coupled to the front end of the dilution part 400.

The diffusion tube part 570 may have a coupling groove 572 at its rear end. The coupling groove 572 may be formed in the circumferential direction, and the front end of the guide wall 430 may be inserted into the coupling groove 572. In addition, the rear end of the diffusion tube portion 570 may be inserted and coupled to the inside of the second passage portion 420.

The diffusion tube portion 570 may have an additional diffusion portion 571 formed through the axial direction. The additional diffusion part 571 may be formed such that the inner diameter increases toward the front direction, and the secondary dilution gas generated by the dilution part 400 may be moved to the additional diffusion part 571.

The stopper 580 may be coupled to the front end of the diffusion tube part 570. The stopper 580 may seal the front end of the diffusion tube part 570.

The discharge pipe 590 may be coupled to the stopper 580. A plurality of discharge pipes 590 may be combined. A connection hole 581 may be formed through the stopper 580 so that the discharge pipe 590 is coupled, and the secondary dilution gas of the additional diffusion part 571 moves to the discharge pipe 590 through the connection hole 581 Can be. A particle counter (not shown) may be connected to the discharge pipe 590, and the secondary dilution gas may be moved to the particle counter through the discharge pipe 590.

According to this embodiment, the exhaust gas is mixed with the first dilution air in the ejector unit 200 to be dilution first, and the dilution unit 400 is mixed with the second dilution air to make the second dilution. Can be high.

As described above, the primary dilution air supplied to the ejector unit 200 may be air at a high temperature of 150° C. to 250° C., and the primary dilution gas generated by the ejector unit 200 may be generated by a high temperature dilution method. I can.

In addition, the secondary dilution air supplied to the dilution unit 400 may be air at room temperature, and may be supplied at a temperature of 10°C to 30°C. The secondary dilution gas generated by the dilution unit 400 may be generated by a room temperature dilution method.

4 is a graph for explaining the effect of the dilution temperature in the exhaust gas dilution apparatus according to the first embodiment of the present invention.

Referring to FIG. 4, the exhaust gas discharged from the nozzle unit 300 is in a high temperature state (P0). If the primary dilution air mixed with the high temperature exhaust gas is air at room temperature, that is, the high temperature When the exhaust gas is diluted at room temperature, all of the moisture in the exhaust gas may be converted into droplets. Accordingly, the primary dilution gas in the first state P1 generated in the diffusion unit 213 may contain a large amount of droplets. And, when the primary dilution gas containing a large amount of droplets is mixed with the secondary dilution air at room temperature in the dilution unit 400 to generate the secondary dilution gas in the second state (P2), a large amount of the secondary dilution gas The droplets of will continue to be included. Since such droplets can be treated as particles during measurement with a particle counter (not shown), it may cause a decrease in measurement accuracy.

However, according to the present invention, the primary dilution gas generated in the diffusion unit 213 by mixing the high-temperature exhaust gas P0 with the high-temperature primary dilution air, that is, the high-temperature dilution of the high-temperature exhaust gas, is A third state (P3) may be established, and moisture in the exhaust gas may be prevented from becoming droplets. In addition, since the dilution unit 400 is mixed with the secondary dilution air at room temperature to form the secondary dilution gas in the second state (P2), no droplets are included in the secondary dilution gas, or the content of the droplets can be minimized. , Through this, the measurement accuracy of the particles can be improved.

5 is a perspective view showing a nozzle part of an exhaust gas dilution apparatus according to a first embodiment of the present invention.

FIG. 5A shows that the first discharge passage 331 formed on the outer circumferential surface of the nozzle tip portion 330 is formed in a spiral shape, and since this has been described above, a description thereof will be omitted.

Meanwhile, as shown in FIGS. 5B and 5C, the first discharge passage 331a may be formed in the axial direction of the nozzle tip portion 330a, and the first discharge passage 331a is It may be formed in plurality at predetermined intervals along the circumferential direction of the nozzle tip portion 330a.

Here, the flange part 310a, the connection part 320a, and the second discharge hole 340 of the nozzle part 300a are the flange part 310, the connection part 320, and the second discharge shown in FIG. 5A. It may be the same as the hole 340.

6 is an exploded cross-sectional view showing a nozzle portion of an exhaust gas dilution apparatus according to a second embodiment of the present invention. In the present embodiment, the first discharge passage formed on the outer circumferential surface of the nozzle tip may be formed on the inner circumferential surface of the accelerator 212, and other configurations are the same as those of the first embodiment described above, so the repeated content is omitted as much as possible.

First, as shown in (a) of FIG. 6, the acceleration unit 1212 may have a second discharge passage 1215 on an inner circumferential surface. Here, the second discharge passage 1215 may be formed spirally recessed in the inner circumferential surface of the acceleration unit 1212.

In addition, the nozzle part 1300 may have a flange part 1310, a connection part 1320, and a nozzle tip part 1330, and a second discharge hole 1340 may be formed through the nozzle part 1300 in the axial direction. have. The nozzle tip portion 1330 may be formed such that an outer diameter corresponds to an inner diameter of the acceleration portion 1212.

When the nozzle tip part 1330 is inserted into the acceleration part 1212, the first dilution air flowing into the first inlet 1220 is the second discharge passage 1215 from the suction part 1211 of the first discharge hole 1210. It may be moved to the diffusion unit 1213 through.

Meanwhile, as shown in FIGS. 6B and 6C, the second discharge passage 1215a may be formed in the axial direction on the inner circumferential surface of the acceleration part 1212a, and the second discharge passage 1215a ) May be formed in plural at predetermined intervals along the circumferential direction of the acceleration part 1212a.

When the nozzle tip part 1330 is inserted into the acceleration part 1212a, the first dilution air flowing into the first inlet 1220 is flown from the suction part 1211 of the first discharge hole 1210a to the second discharge passage 1215a. It may be moved to the diffusion unit 1213 through.

The preheating unit 600 may be provided at a rear end of the head unit 100 and may pre-heat the exhaust gas 1 flowing into the head unit 100.

The preheating unit 600 may preheat the exhaust gas 1 to a temperature of 190°C to 210°C. When the exhaust gas 1 is preheated and moved to the ejector unit 200, it is mixed with the above-described primary dilution air, so that it can be diluted at high temperature more effectively.

7 is an exemplary view showing a cleaning fluid supply unit of FIG. 1.

As shown in FIG. 7, the cleaning fluid supply unit 700 may include a compression unit 710, a drying unit 720, a filter unit 730, and a joint channel unit 740.

The compression unit 710 may compress and spray the cleaning fluid PA. Room temperature air may be used as the cleaning fluid PA, but is not limited thereto.

The drying unit 720 may be provided at the front end of the compression unit 710 and may dry the cleaning fluid PA.

The filter unit 730 may be provided at the front end of the drying unit 720 and may remove foreign substances from the cleaning fluid PA. Accordingly, the cleaning fluid PA discharged from the filter unit 730 may be in a state that does not contain moisture and foreign substances.

The joint channel part 740 may be provided between the head part 100 and the preheating part 600. The joint flow path part 740 guides a part of the cleaning fluid PA moving through the filter part 730 to the head part 100 and guides the rest of the cleaning fluid PA to the preheating part 600. I can.

To this end, the jointed flow path part 740 is formed to extend in the radial direction of the jointed flow path part 740 inside, and is connected to the filter part 730 so that the cleaning fluid PA moving from the filter part 730 flows in. The inlet passage 741 is connected to the inlet passage 741 and the first guide passage 742 extending in the direction of the head portion 100, and the inlet passage 741 and the preheating portion 600 ) May have a second guide passage 743 extending in the direction.

The first guide passage 742 and the second guide passage 743 may be formed to be symmetrical to each other with respect to the inflow passage 741 and may be formed to have the same diameter. The cleaning fluid PA flowing into the inflow passage 741 may be supplied with the same flow rate to the first guide passage 742 and the second guide passage 743, respectively.

The joint flow passage part 740 is designed to allow the washing fluid PA flowing into the inflow passage 741 to be bisected and supplied to the first guide passage 742 and the second guide passage 743 at the same flow rate, respectively. It may further have a separating protrusion 744. The separating protrusion 744 is formed to face the inflow passage 741 and can divide the inflow passage 741 in two directions.

The cleaning fluid PA moving to the first guide passage 742 is moved through the head part 100, the ejector part 200, the dilution part 400, the diffusion tube part 570, and the discharge pipe 590. The inside of each part can be washed.

In addition, the cleaning fluid PA moving to the second guide passage 743 may clean the interior of the preheating unit 600 while moving through the preheating unit 600.

8 is a configuration diagram showing the measurement unit of FIG. 1.

1, 2, and 8, the exhaust gas dilution device is coupled to the front end of the dilution unit 400, and may include a measurement unit 800 for measuring particle information of the secondary dilution gas.

The measurement unit 800 may include an injection unit 810, a light source 820, a light receiving unit 830, and a calculation unit 840.

The secondary dilution gas may be moved to the injection unit 810 through a flow channel 591 connected to the discharge pipe 590. Then, the injection unit 810 may sequentially inject the particles P included in the secondary dilution gas one by one.

The light source 820 may irradiate the light 821 in a direction crossing the spray path of the particles P sprayed from the spray unit 810. When the light 821 crossing the spray path of the particles P collides with the particles P on the spray path, scattering may occur.

The light receiving unit 830 may be provided on one side of the injection path and may receive light 822 scattered by particles P injected from the injection unit 810 after being irradiated from the light source 820. When the size of the particles P sprayed from the injection unit 810 is large, the scattered light 822 increases, and conversely, when the size of the particles P is small, the scattered light 822 may decrease.

The calculation unit 840 may calculate size information of particles included in the secondary dilution gas based on the light information generated by the light receiving unit 830. The particle size information may be calculated for particles acquired during a preset measurement time.

The size information of the particles calculated by the calculation unit 840 is, for example, the concentration of PM10 (Particulate Matter with a diameter less than 10 μm), which is usually referred to as fine dust, or It can be calculated as the concentration of PM2.5, which is usually referred to as ultrafine dust with a size of 2.5㎛ or less.

The closer the cleaning fluid supply unit 700 is positioned toward the front end of the exhaust gas dilution device, the closer the distance between the supplied cleaning fluid and the measurement unit 800 is. Then, foreign matters inside the exhaust gas dilution device are moved to the measurement unit 800 by the cleaning fluid, and thus, disturbance of the measurement unit 800 may occur, thereby deteriorating measurement accuracy.

However, in the present invention, it is possible to sufficiently secure a distance between the supplied cleaning fluid and the measurement unit 800 by allowing the cleaning fluid supply unit 700 to be relatively connected to the rear end of the exhaust gas dilution device. One problem can be avoided.

9 is an exemplary view showing an operation example of the separation unit of FIG. 1.

As shown in FIGS. 2 and 9, the exhaust gas dilution device may further include a separation unit 900.

The separation unit 900 may be provided at a rear end of the preheating unit 600. The separating unit 900 may cyclone-separate a group of target particles less than a predetermined size from the exhaust gas 1 introduced from the outside and guide them to the preheating unit 600. Accordingly, the measurement unit 800 may calculate particle information for the target particle group.

The separating part 900 may have a cylindrical part 910, an inlet pipe 920, a main body 930, a dust collecting part 940, and an outlet pipe 950.

The inlet pipe 920 may be provided in a tangential direction to the cylindrical portion 910, and exhaust gas 1 may be introduced into the inlet pipe 920.

The main body 930 is connected to the cylindrical part 910 and may be formed in a conical shape, the dust collecting part 940 is provided at a pointed end of the main body 930, and the outlet pipe 950 is formed of the cylindrical part 910. It may be provided in the inner center in the direction of the central axis of the main body 930.

Exhaust gas 1 introduced into the inlet pipe 920 enters the inside of the cylindrical portion 910 in a tangential direction from the inlet pipe 920 and becomes a swirling flow to be moved to the cylindrical portion 910 and the body 930 in a spiral shape I can. During this time, particle groups other than the target particle group in the first airflow C1 from the cylindrical part 910 to the dust collecting part 940 are deposited on the inner surface of the main body 930 by receiving centrifugal force, and the first airflow C1 It may be collected in the dust collecting unit 940 by the flow force of. On the other hand, at the pointed end of the main body 930, the airflow reverses its direction to become the second airflow (C2) of the swirling flow in the opposite direction to the first airflow (C1), and the target particle group in the second airflow (C2). The silver may pass through the center of the first airflow C1 and be moved to the outlet pipe 950 and discharged.

The outlet pipe 950 may be connected to the preheating unit 600, and accordingly, the target particle group may flow into the preheating unit 600.

The separation unit 900 is not limited to the above-described configuration, and various types of cyclones may be used.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later, and all changes or modified forms derived from the meaning and scope of the claims and the concept of equivalents thereof should be construed as being included in the scope of the present invention.

1: Exhaust gas 2: Primary dilution air
3: second dilution air 100: head
200: ejector part 210: first discharge hole
211: suction unit 212, 1212, 1212a: acceleration unit
213: diffusion unit 220: first inlet
300, 300a, 1300: nozzle portion 330, 330a, 1330: nozzle tip portion
331, 331a: first discharge passage 400: dilution part
410: first euro part 411: tonggong
420: second passage part 430: guide wall
500: first adapter unit 550: second adapter unit
570: diffusion tube portion 580: plug portion
590: discharge pipe 600: preheating part
700: cleaning fluid supply unit 740: joint flow path unit
744: septic projection 800: measuring unit
1215, 1215a: 2nd discharge passage

Claims (10)

A head portion through which exhaust gas is introduced and moved from the outside;
An ejector unit coupled to the front end of the head unit and guiding the primary dilution air to be introduced and moved from the outside;
A nozzle unit for inducing the exhaust gas flowing into the head unit to be ejected forward of the ejector unit by increasing the flow velocity of the primary dilution air moving from the ejector unit;
It is coupled to the front end of the ejector unit, and the first dilution gas is generated by mixing the exhaust gas and the primary dilution air in the ejector unit, and then the discharged primary dilution gas is mixed with the secondary dilution air introduced from the outside to produce a secondary dilution gas. A dilution part to be generated;
A preheating unit provided at a rear end of the head unit and preheating the exhaust gas flowing into the head unit; And
And a cleaning fluid supply unit provided between the head unit and the preheating unit and supplying a cleaning fluid to the head unit and the preheating unit. The method of claim 1,
The cleaning fluid supply unit
A compression unit for compressing and spraying the cleaning fluid,
A drying unit provided at a front end of the compression unit and drying the cleaning fluid,
A filter unit provided at a front end of the drying unit to remove foreign substances from the cleaning fluid,
Exhaust air, characterized in that it has an adapter part provided between the head part and the preheating part and guiding a part of the cleaning fluid moving through the filter part to the head part and guiding the rest of the cleaning fluid to the preheating part Gas dilution device. The method of claim 1,
The preheating unit preheats the exhaust gas to a temperature of 190°C to 210°C, and the first dilution air is supplied at a temperature of 150°C to 250°C so that the first dilution gas is generated by a high-temperature dilution method, and the second The exhaust gas dilution apparatus, characterized in that the secondary dilution air is supplied at a temperature of 10 ℃ to 30 ℃ so that the dilution gas is generated by the room temperature dilution method. The method of claim 1,
And a separating unit provided at a rear end of the preheating unit and guiding the cyclone to the preheating unit by separating a group of target particles of a predetermined size or less from the exhaust gas introduced from the outside. The method of claim 1,
An exhaust gas dilution apparatus comprising a measuring unit coupled to a front end of the dilution unit and measuring particle information of the secondary dilution gas. The method of claim 5,
The measurement unit
An injection unit for sequentially injecting the particles contained in the secondary dilution gas one by one,
A light source for irradiating light in a direction crossing the spray path of the particles sprayed from the spraying unit,
A light receiving unit provided on one side of the injection path and receiving light scattered by the particles injected from the injection unit after being irradiated from the light source,
And a calculator configured to calculate size information of particles included in the secondary dilution gas based on the light information generated by the light receiving unit. The method of claim 1,
The head portion has a space through which the exhaust gas is introduced, and a through hole formed through the central axis and connected to the space,
The ejector part has a first discharge hole formed through the central axis direction and connected to the through hole, and a first inlet for guiding the primary dilution air to the first discharge hole,
The first discharge hole has a suction part formed at a rear end of the ejector part and connected to the first inlet, an acceleration part formed at a front end of the suction part, and a diffusion part formed at a front end of the acceleration part. Gas dilution device. The method of claim 7,
The nozzle part has a flange part coupled to the inner surface of the space part, a connection part connected to the flange part and provided inside the through hole and the suction part, and an outer diameter formed at a front end of the connection part and corresponding to the inner diameter of the acceleration part And a nozzle tip part inserted into the accelerator part. The method of claim 8,
The exhaust gas dilution device, characterized in that the nozzle tip part has a first discharge passage through which the primary dilution air introduced into the suction part is discharged to the diffusion part. The method of claim 8,
And a second discharge passage through which the primary dilution air introduced into the suction unit is discharged to the diffusion unit on an inner circumferential surface.

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