JP2001295644A - Exhaust gas processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust gas processing device, capable of effectively removing moisture from exhaust gas. SOLUTION: This exhaust gas processing device has a casing inside which the exhaust gas flows; condensation plates provided inside the casing such that a flow of the exhaust gas collides the condensation plates, condensing the moisture in the exhaust gas onto the surfaces; a condensed water storage tank provided in a bottom part of the casing, storing the condensed water generated by the moisture condensation; and condensed water lead flow passages provided between the condensation plates and the storage tank, collecting the condensed water condensed on the surfaces of the condensation plates and leading the condensed water into the storage tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas treatment apparatus, and more particularly to an exhaust gas treatment apparatus capable of effectively removing moisture in exhaust gas of a gasoline automobile.

[0002]

2. Description of the Related Art In recent years, air pollution caused by automobile exhaust gas has become serious in large cities and areas along arterial roads.

With respect to gasoline automobiles, exhaust gas regulations have been tightened in recent decades, so that combustion control in engines and oxidation / reduction of harmful components in exhaust gas by oxidation-reduction catalysts or Sangen treatment catalysts have been carried out. For example, purifying exhaust gas has been generally performed.

[0004] However, none of the above means has been able to completely remove hydrocarbons in exhaust gas.

As an exhaust gas purifying apparatus capable of effectively removing hydrocarbons in exhaust gas, the present applicant has proposed by the present applicant an exhaust gas which is substantially non-volatile at room temperature and has an affinity for hydrocarbons. An exhaust gas purifying tank containing a purifying liquid therein; an exhaust gas introduction passage for introducing an exhaust gas to be purified into the exhaust gas purifying liquid contained in the exhaust gas purifying tank; There has been proposed an exhaust gas purifying apparatus including an exhaust gas deriving flow path for discharging exhaust gas flowing through a liquid to the outside of the exhaust gas purifying tank (Japanese Patent Application No. 11-270885).

[0006] The applicant of the present invention conducted an experiment on purifying exhaust gas of a diesel vehicle and a gasoline vehicle using the exhaust gas purifying device. As a result, in both the diesel vehicle and the gasoline vehicle, hydrocarbons such as soot were almost completely eliminated. It was found that it could be removed.

[0007]

However, since the exhaust gas of a gasoline vehicle contains a large amount of water vapor, when the exhaust gas of a gasoline vehicle is directly introduced into the exhaust gas purifying device, the moisture in the exhaust gas is reduced. There is a possibility that the exhaust gas purifying liquid condenses in the exhaust gas purifying tank and accumulates in the exhaust gas purifying tank, and the exhaust gas purifying liquid overflows from the exhaust gas outlet passage. Further, when the exhaust gas purification liquid contains a large amount of water, the action of entanglement with soot and the like is weakened, and there is a possibility that the hydrocarbons cannot be sufficiently removed.

[0008] Therefore, in order to treat the exhaust gas of a gasoline automobile for a long time in the exhaust gas purifying device, it is desirable to remove moisture in the exhaust gas in advance.

In view of the above, an object of the present invention is to provide an exhaust gas treatment apparatus capable of effectively removing moisture from exhaust gas containing a high concentration of moisture such as exhaust gas of a gasoline automobile. I do.

[0010]

According to a first aspect of the present invention, there is provided a housing through which exhaust gas flows, and a flow of the exhaust gas colliding inside the housing. A condensing plate for condensing water in the exhaust gas on the surface, a condensed water storage tank for storing condensed water condensed inside the housing, and provided between the condensing plate and the condensed water storage tank. And a condensed water guide channel for collecting condensed water condensed on the surface of the condensing plate and guiding the condensed water to the condensed water storage tank.

In the exhaust gas purifying apparatus, the exhaust gas introduced into the casing collides with the condensing plate, and water in the exhaust gas condenses on the surface of the condensing plate on the exhaust gas introduction side. Condenses as water.

The condensed water on the condensing plate is collected in a condensed water guiding flow path by, for example, exhaust gas flowing along the surface of the condensing plate, and guided to a condensed water storage tank.

According to a second aspect of the present invention, there is provided an exhaust gas processing apparatus in which the casing is formed so that the exhaust gas flows in a substantially horizontal direction.

In the above exhaust gas treatment apparatus, usually,
Since the housing is formed in the shape of a prism, a cylinder, or an ellipse extending in the lateral direction, the exhaust gas treatment device is convenient to be installed under the floor of an automobile.

According to a third aspect of the present invention, there is provided an exhaust gas treatment apparatus having a convex shape in which the condenser plate protrudes toward an upstream side with respect to an exhaust gas introduction direction in the housing.

In the exhaust gas treatment device, the exhaust gas hits the convex surface of the condensing plate, and the water in the exhaust gas condenses on the surface.

According to a fourth aspect of the present invention, the condensed water guide passage extends vertically at both end portions of the condensing plate, and is located upstream of the exhaust gas introduction direction in the housing. It is an exhaust gas treatment device provided with a gutter-shaped flow path that opens toward the exhaust gas.

In the above exhaust gas treatment apparatus, the condensed water condensed on the surface of the condensing plate moves toward both ends of the condensing plate due to the pressure of the exhaust gas flowing along the surface of the condensing plate, and forms a gutter-like flow. It flows inside from the opening of the road and is collected in the condensed water storage tank.

According to a fifth aspect of the present invention, the condenser plate includes:
An exhaust gas treatment device having a V-shaped cross section along a plane parallel to a bottom surface of the housing.

In the exhaust gas purifying device, the exhaust gas impinges on the surface of the condensing plate that protrudes in a V-shape.

According to a sixth aspect of the present invention, in the exhaust gas processing apparatus, the condenser plates are arranged in two or more rows along a direction from the upstream side to the downstream side with respect to the exhaust gas introduction direction in the casing. And an exhaust gas treatment device arranged alternately along a direction perpendicular to the above-mentioned direction.

In the exhaust gas purifying apparatus, a zigzag flow path is formed by the condenser plate, so that the exhaust gas introduced into the casing flows through the zigzag flow path. Therefore, the exhaust gas hits the condenser plate many times before being discharged to the outside, and changes its course. Therefore, if the volume of the housing is the same, more moisture in the exhaust gas can be condensed.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment An example of an exhaust gas treatment device of the present invention will be described below.

FIG. 1 shows a cross section along the horizontal plane of the exhaust gas treatment apparatus, and FIG. 2 shows a cross section taken along a vertical plane XX in FIG. 1 and viewed from the exhaust gas introduction side.

As shown in FIG. 1, the exhaust gas treatment device has a substantially prismatic casing 1 extending in the horizontal direction and through which exhaust gas flows. The end plates 1A and 1B of the casing 1 are each formed in a pyramid shape protruding outward, and an exhaust gas introduction pipe 1C for introducing exhaust gas into the casing 1 and the casing 1
Exhaust pipe 1D for extracting exhaust gas from the end plate 1
A and the end plate 1B protrude outward along the center line of the housing 1 from the respective tops.

As shown in FIG. 2, a rectangular parallelepiped condensed water storage tank 2 for storing condensed water in which water in the exhaust gas is condensed is provided integrally below the housing 1.

The housing 1 and the condensed water storage tank 2 are partitioned by a housing bottom plate 1E which forms the bottom surface of the housing 1. The housing bottom plate 1E is bent upward along the longitudinal center line of the housing 1, in other words, toward the ceiling plate 1G of the housing 1, to form a ridge along the longitudinal direction of the housing 1. are doing.

The housing bottom plate 1E and the ceiling plate 1G in the housing 1
And a partition plate 1F parallel to the housing bottom plate 1E.
Is provided. The partition plate 1F also has the same shape and size as the housing bottom plate 1E, and is bent upward in a chevron shape along the longitudinal center line of the housing 1 to form a ridge along the longitudinal direction of the housing 1. Has formed.

On the lower surface of the housing bottom plate 1E, a glass wool layer 7 for preventing the heat of the exhaust gas introduced into the housing 1 from being transmitted to the condensed water storage tank 2 is provided.

As shown in FIG. 2, in the condensed water storage tank 2, near the housing bottom plate 1E, the condensed water from the housing 1 is temporarily stored, and at the same time, the fluctuation of the exhaust gas pressure inside the housing 1 is changed. A water collection chamber 2 </ b> A is provided to prevent the water from directly reaching the storage tank 2.

The water collecting chamber bottom plate 2B forming the bottom surface of the water collecting chamber 2A is provided substantially horizontally, and has a diameter of 3 to 5 mm.
A hole of about mm is formed by a punch metal plate which is a metal plate having many openings on the entire surface.

Below the water collecting chamber bottom plate 2B, a wave preventing plate 2C formed of a punched metal plate is provided in parallel with the water collecting chamber bottom plate 2B. The wave preventing plate 2C has a function of preventing the surface of the condensed water stored in the condensed water storage tank 2 from violently dancing due to external vibration or the like. The punched metal plate forming the wave preventing plate 2C may have the same or different hole diameter as the water collecting chamber bottom plate 2B.

A wave preventing plate 2C and a condensed water storage tank bottom plate 2D
Between the condensed water storage tank 2 and the partition plate 2
E is provided. The partition plate 2E is provided in the vertical direction, and is formed of a punch metal plate similarly to the wave preventing plate 2C and the water collecting chamber bottom plate 2B. Partition plate 2E
It also has a function of preventing the surface of the condensed water stored in the condensed water storage tank 2 from violently dancing. The hole diameter of the partition plate 2E may be the same as or different from that of the wave prevention plate 2C and the water collecting chamber bottom plate 2B.

A drain outlet 2F for discharging condensed water accumulated in the condensed water storage tank 2 is provided at the center of the condensed water storage tank bottom plate 2D. The drain outlet 2F is normally closed by a cap 2G.

In the condensed water storage tank 2, near the bottom plate 2D of the condensed water storage tank, as shown in FIG. 2, when the liquid level of the condensed water inside rises above a certain level, the condensed water is discharged to the outside. A water seal valve 2H is provided. Water seal valve 2H
Is formed from a single tube as shown in FIG. 2, is bent upward at a root portion, and is formed in a loop shape at a distal end portion.

As shown by a two-dot chain line in FIG. 2, when the level of the condensed water in the condensed water storage tank 2 exceeds the height of the apex of the loop portion, the water seal valve 2H is operated according to the siphon principle.
Condensed water is discharged to the outside, and the height of the water surface in the condensed water storage tank 2 is kept constant.

As shown in FIGS. 1 and 2, the housing bottom plate 1E
On the upper surface of the partition plate 1F, a V-shaped plate 3 corresponding to a condensing plate provided in the exhaust gas treatment device of the present invention is provided.
Are arranged in three rows along the longitudinal direction. The V-shaped plate 3 protrudes upstream (hereinafter simply referred to as “upstream side”) with respect to the exhaust gas introduction direction indicated by an arrow a in FIG. 1, in other words, downstream with respect to the exhaust gas introduction direction a. It has a V-shaped planar shape that opens to the side (hereinafter, simply referred to as “downstream side”). Therefore, the moisture in the exhaust gas condenses on the upstream surface of the V-shaped plate 3, in other words, on the surface protruding in a V-shape. Of the V-shaped plates 3 arranged in the three rows, one row is a casing bottom plate 1E.
And a central portion of the partition plate 1F, that is, a portion where a ridge is formed, to form a central V-shaped plate row 31.
On the other hand, the remaining two rows are side walls 1H of the housing 1, respectively.
To form the outer V-shaped plate row 32. The V-shaped plates 3 are alternately arranged along the width direction of the housing 1.

Outside the V-shaped plate 3, an outer plate 4 is provided upright. As shown in FIG. 1, the outer plate 4 is disposed so as to extend downstream from the side wall 1 </ b> H of the housing 1 toward the center when viewed from above.

As shown in FIG. 1, a C-shaped cylinder 3A for collecting condensed water condensed on the surface of the V-shaped plate 3 is provided near both ends of the V-shaped plate 3. Similarly, a C-shaped cylinder 4A having a similar function is provided near the edge of the outer plate 4 near the center of the housing 1.

FIG. 3 is an enlarged view of the V-shaped plate 3 and the outer plate 4 in the vicinity of the edge portions as viewed from above. FIG.
As shown in (1), each of the C-shaped cylinders 3A and 4A is a gutter-shaped member having a C-shaped cross section, and is open toward the upstream side. Each of the C-shaped cylinders 3A and 4A is provided in the vertical direction, and is fixed to the V-shaped plate 3 and the outer plate 4 at one of a pair of edges along the longitudinal direction. Further, the C-shaped cylinders 3A and 4A have an imaginary plane (two in FIG. 3) in which the end edge opposite to the side fixed to the V-shaped plate 3 and the outer plate 4 belongs to the V-shaped plate 3 and the outer plate 4. (Shown by a dotted chain line) so as to protrude upstream with respect to the exhaust gas introduction side.

Further, as shown in FIG.
And the outer plate 4 has C-shaped cylinders 3A and 4A
Is fixed along the inner wall surfaces of the C-shaped cylinders 3A and 4A in a cylindrical shape so that the distance between the edge portions on the side where the is fixed and the inner wall surfaces of the C-shaped cylinders 3A and 4A gradually decreases. ,
The water flow entraining ribs 3B and 4B are formed. Accordingly, gaps 3C and 4C are formed between the C-shaped cylinder 3A and the water flow entraining rib 3B and between the C-shaped cylinder 4A and the water entrainment rib 4B, respectively, as the distance from the entrance increases.

As shown in FIGS. 1 to 3, condensed water collecting pipes 5A and 5B for collecting condensed water condensed on the surfaces of the V-shaped plate 3 and the outer plate 4 are provided on the lower surfaces of the housing bottom plate 1E and the partition plate 1F. Are provided along the width direction of the housing 1. The condensed water collecting pipes 5A and 5B are also provided on the housing bottom plate 1
Like E and the partition plate 1F, it has a gradient in a direction in which the height decreases from the center of the housing 1 toward the side wall 1H. Outside the housing 1, a condensed water outlet pipe 6 that communicates the condensed water collecting pipes 5A and 5B and the water collecting chamber 2A is provided along the side wall 1H.

The casing bottom plate 1E and the partition plate 1F have circular openings q at regular intervals along the condensed water collecting pipes 5A and 5B.
Is provided. The condensed water collecting pipe 5A is aligned with the position of the opening q in the housing bottom plate 1E and the partition plate 1F.
And 5B are also provided with a circular opening q ′. Opening q
And the opening q ′ have the same diameter. The lower ends of the C-shaped cylinders 3A and 4A are inserted into the openings q and q '.

Drops of condensed water condensed on the upstream surfaces of the V-shaped plate 3 and the outer plate 4 are discharged by the exhaust gas flowing along the surfaces of the V-shaped plate 3 and the outer plate 4 to form C-shaped cylinders 3A and 4A. Blown toward
A gap 3C between the mold cylinder 3A and the water flow entraining rib 3B,
And it is blown into the gap 4C between the C-shaped cylinder 4A and the water flow entraining rib 4B.

As described above, since the gaps 3C and 4C become narrower as the distance from the entrance increases, the exhaust gas blown into the gaps 3C and 4C loses the water flow entraining ribs 3B and 4B.
A vortex-shaped acceleration flow is formed toward the center of the cylindrical space surrounded by the inner wall surface. Therefore, the water flow entraining rib 3
Since the pressure inside B and 4B is reduced, the droplets of the condensed water are sucked into the water flow entraining ribs 3B and 4B.

The condensed water sucked inside the water flow entraining ribs 3B and 4B is collected in the condensed water collecting pipes 5A and 5B through the openings q and q ', and passed through the condensed water outlet pipe 6 to collect the water in the water collecting chamber 2A. And is guided to the condensed water storage tank 2. C-shaped cylinders 3A and 4A and water flow entraining rib 3B
And 4B, condensed water collecting pipes 5A and 5B, condensed water outlet pipe 6, and water collecting chamber 2A correspond to a condensed water guiding flow path in the exhaust gas treatment device of the present invention, and are C-shaped cylinders 3A and 4A. Corresponds to a gutter-like flow path in the exhaust gas treatment apparatus of the present invention.

As shown in FIG. 1, the condensed water which cannot be collected by the C-shaped cylinders 3A and 4A or overflows from the C-shaped cylinders 3A and 4A is further applied to the casing bottom plate 1E and the partition plate 1F. Slit-shaped water droplet collecting port 8 for collecting
Are provided in two rows along the width direction of the housing 1. One of the water drop collecting ports 8 is a housing bottom plate 1E and a partition plate 1F.
Near the downstream edge of the
It is provided further upstream than that.

FIG. 4 shows a cross section of the vicinity of the water droplet collecting port 8 in the housing 1 taken along the longitudinal direction of the housing 1, and shows a vertical surface along the width direction of the housing 1 (Y in FIG. 4). −
Indicated by Y. FIG. 5 shows a cross section taken along the line ()) viewed from the upstream side.

As shown in FIG. 4, the upstream edge of the water droplet collecting port 8 is formed integrally with the housing bottom plate 1E and the partition plate 1F so as to be bent downward toward the downstream side. In addition, a water droplet guide plate 8A for guiding condensed water is provided in the water droplet collecting port 8. On the other hand, a water drop receiver 8B extending downward from the water drop guide plate 8A and having a substantially L-shaped cross-section along the longitudinal direction of the housing 1 is provided at an edge portion on the downstream side of the water drop collecting port 8. Is the housing bottom plate 1E and the partition plate 1F
And are integrally formed. The water droplet receiver 8B has a function of receiving condensed water dropped from the tip of the water droplet guide plate 8A.
A water splash prevention plate 8C extending diagonally upward toward the upstream side is formed integrally with the housing bottom plate 1E and the partition plate 1F at the edge of the water droplet collection port 8.

As shown in FIGS. 4 and 5, the housing bottom plate 1E
A water drop collecting gutter 9 for receiving condensed water dropped along the water drop guide plate 8A and the water drop receiver 8B is fixed below the water drop guide plate 8A and the water drop receiver 8B in the partition plate 1F. To both ends of the water droplet collecting gutter 9, a condensed water outlet pipe 10 for guiding the condensed water received by the water droplet collecting gutter 9 to the water collecting chamber 2 </ b> A is connected.

Hereinafter, the flow of the exhaust gas and the condensed water inside the exhaust gas processing apparatus according to the first embodiment will be described.

FIG. 6 shows the flow of exhaust gas in the exhaust gas processing apparatus. As shown by an arrow b in FIG.
Most of the exhaust gas introduced from the exhaust gas introduction pipe 1C flows toward the central V-shaped plate row 31, and some of the exhaust gas is
It flows along the side wall 1H.

Here, as shown in FIG. 6, arrows c and c are provided between the center V-shaped plate row 31 and the outer V-shaped plate row 32 and between the outer V-shaped plate row 32 and the outer plate 4. As shown by d, a zigzag flow path is formed.

The exhaust gas flowing toward the central V-shaped plate row 31 is, as shown in FIG.
While splitting into the left and right by hitting the most upstream V-shaped plate 3 and flowing downstream along the flow path c.
The surface on the upstream side of the V-shaped plate 3 in the center V-shaped plate row 31 and the surface on the upstream side of the V-shaped plate 3 in the outer V-shaped plate row 32 are successively hit.

On the other hand, the exhaust gas flowing along the side walls 1H on both sides hits the outermost plate 4 on the most upstream side, and the flow path d
, And successively hits the surface on the upstream side of the V-shaped plate 3 and the surface on the upstream side of the outer plate 4 in the outer V-shaped plate row 32.

When the exhaust gas hits the upstream surface of the V-shaped plate 3 and the outer plate 4, the moisture in the exhaust gas becomes V
It condenses on said surfaces of the mold plate 3 and the outer plate 4. As shown in FIG. 3, the condensed water condensed on the V-shaped plate 3 and the outer plate 4 is blown toward the C-shaped cylinders 3A and 4A by the exhaust gas as described above, and passes through the gaps 3C and 4C. The collected water is collected in the collecting pipes 5A and 5B, and is collected in the water collecting chamber 2A through the condensed water outlet pipe 6.

The condensed water collected in the water collecting chamber 2A is
It falls into the condensed water storage tank 2 through a punch hole in the bottom surface 2B of the water collecting chamber 2A.

On the other hand, the condensed water overflowing from the C-shaped cylinders 3A and 4A, and the condensed water condensed on the housing bottom plate 1E and the partition plate 1F, as shown in FIGS. It is pushed and moves toward the downstream side on the housing bottom plate 1E and the partition plate 1F, is guided into the water droplet collecting port 8 by the water droplet guiding plate 8A, and is received from the edge of the water droplet guiding plate 8A.
B falls toward B and is collected in the water drop collecting gutter 9. The condensed water collected in the water drop collecting gutter 9 is collected in the water collecting chamber 2A through the condensed water outlet pipe 10.

In the exhaust gas treatment apparatus according to the first embodiment, since a large number of V-shaped plates 3 and outer plates 4 are provided inside the casing 1, the V-shaped plate has a large amount of moisture in the exhaust gas. 3 and condenses on the outer plate 4. And, as described above, the condensed water on the V-shaped plate 3 and the outer plate 4 is collected in the condensed water collecting pipes 5 and 6 by the accelerated flow that the exhaust gas forms in the gaps 3C and 4C, and the condensed water storage tank 2, a pump for collecting condensed water in the condensed water storage tank 2 is unnecessary. In addition, since the water droplet collecting port 8 is provided, condensed water that could not be collected by the C-shaped cylinder 3A and the water droplet entanglement rib 3B and the C-shaped cylinder 4A and the water droplet entanglement rib 4B,
E or the condensed water condensed on the partition plate 1F can also be reliably collected in the condensed water storage tank 2. As described above, the exhaust gas treatment device can remove water in the exhaust gas particularly effectively, despite having no moving parts and having a simple mechanism.

Further, in the exhaust gas treatment apparatus, since the exhaust gas hits a number of the V-shaped plates 3 and the outer plates 4 and is led out to the outside, a high silencing effect is obtained.

Moreover, since the exhaust gas treatment device does not have a portion that generates a large flow resistance when the exhaust gas passes, such as a water absorbing agent layer, the flow resistance of the exhaust gas is small. Therefore, the output of the engine is less reduced even though the noise reduction effect is large.

Further, since the housing 1 and the condensed water storage layer 2 are integrally formed, the housing is compact.

In addition, the condensed water storage layer 2 is provided with a water collecting chamber 2A, and further includes a wave prevention plate 2C and a partition plate 2C.
Since E is provided, the surface of the condensed water stored in the condensed water storage tank 2 due to fluctuations in the pressure of the exhaust gas inside the housing 1 and vibrations from a vehicle equipped with the exhaust gas treatment device, etc. Is violently shaken, and the condensed water does not overflow out of the condensed water storage tank 2. 2. Second Embodiment Another example of the exhaust gas treatment device according to the present invention will be described below.

FIG. 7 shows a cross section along the horizontal plane of the exhaust gas treatment apparatus. As shown in FIG. 7, the exhaust gas processing apparatus uses the exhaust gas shown in FIG. 1 except that a semi-cylindrical plate 11 formed in a substantially semi-cylindrical shape is used instead of a V-shaped plate as a condensing plate. It has the same configuration as the processing device. The semi-cylindrical plate 11 is erected on the housing bottom plate 1E (not shown in FIG. 7) and the partition plate 1F such that the surface on the side protruding in a semi-cylindrical shape faces the upstream side.

FIG. 8 shows a plan view of the semi-cylindrical plate 11, wherein the semi-cylindrical plate 11 includes the casing bottom plate 1 E and the partition plate 1.
FIG. 9 shows the details of the state of standing on F. As shown in FIG. 8, the semi-cylindrical plate 11 has a trough-shaped semi-cylindrical plate main body 11A formed in a semi-cylindrical shape, and an edge along the longitudinal direction of the semi-cylindrical plate main body 11A formed into a cylindrical shape inside. A semi-cylindrical C-shaped cylinder 11C provided on the inner surface of each of the end portions of the semi-cylindrical plate body 11A so as to surround the semi-cylindrical plate rib 11B from the outside. And One of the longitudinal edges of the C-shaped cylinder 11C is fixed to the inner surface of the semi-cylindrical plate body 11A so that the opening faces the outside of the semi-cylindrical plate body 11A, and the other edge is The semi-cylindrical plate main body 11A is formed so as to protrude outward along the radial direction of a virtual cylindrical surface (indicated by a two-dot chain line in FIGS. 8 and 9) to which the outer surface of the main body 11A belongs.

As shown in FIG. 9, the lower end of the C-shaped cylinder 11C is inserted into and fixed to a circular opening q provided in the housing bottom plate 1E and the partition plate 1F.

In the exhaust gas processing apparatus shown in FIG.
The exhaust gas introduced from the exhaust gas introduction pipe 1C hits the surface of the half-cylindrical plate 11 on the side bulging into a semi-cylindrical shape, and the moisture contained in the exhaust gas is condensed into condensed water. The condensed water condensed on the surface of the semi-cylindrical plate 11 is discharged by the exhaust gas flowing downstream along the surface of the semi-cylindrical plate 11, that is, upward in FIGS.
It is blown toward the mold plate 11C, is sucked between the C-shaped plate 11C and the water flow entraining rib 11B, and is collected in the condensed water collecting pipes 5A and 5B through the openings q and q '.

As described above, the exhaust gas processing apparatus uses the semi-cylindrical plate 11 as a condensing plate on which moisture in the exhaust gas condenses. Therefore, the exhaust gas processing apparatus according to the first embodiment is provided. In addition to the features, it has the feature that the resistance loss when exhaust gas flows is further reduced. 3. Third Embodiment FIG. 10 shows an example in which the exhaust gas treatment apparatus according to the first embodiment is provided with a condensed water level adjusting means for adjusting the level of the condensed water in the condensed water storage tank to a predetermined range. . 10, the same reference numerals as those in FIG. 2 indicate the same components as those shown in FIG.

As shown in FIG. 10, the exhaust gas treatment apparatus according to the third embodiment is provided with a condensed water level controller 12 for maintaining the level of the water surface in the condensed water storage tank 2 within a certain range. ing. Condensed water level controller 12
Corresponds to the condensed water surface level adjusting means. The exhaust gas treatment device has the same configuration as that of the exhaust gas treatment device according to the first embodiment, except that the exhaust gas treatment device includes a condensed water level control device 12.

The condensed water level controller 12 is provided vertically along the outer wall of the condensed water storage tank 2, communicates at the upper end with the vicinity of the wave preventing plate 2 C in the condensed water storage tank 2, and at the lower end. A water level detection pipe 12a communicating with the condensed water storage tank bottom plate 2D in the condensed water storage tank 2;
And a float 12b that moves up and down the vertical portion in accordance with a change in the water level inside the water level detection pipe 12a. Inside the water level detection pipe 12a, it is provided near the upper end, and when the water surface in the water level detection pipe 12a reaches a _first predetermined level h1 close to the wave preventing plate 2C and the float 12b comes into contact with the lower side. The first micro switch 12c that is turned on and the first micro switch 12c are turned on.
Is provided between the lower end portion of the micro-switch 12c and water level detecting pipe 12a, the water surface in the water level detection line 12a is lowered to a predetermined level h ₂ second lower than the first predetermined level h ₁ And a second micro switch 12d that is turned on when the float 12b comes into contact with the upper side.

As shown in FIG. 10, the condensed water level control device 12 further includes a condensed water discharge pipe 12e for discharging the condensed water in the condensed water storage tank 2 to the outside, and replenishment to the condensed water storage tank 2. A replenishing water tank 12g in which replenishing water to be stored is stored;
A condensed water replenishment flow path 12f that connects the replenished water tank 12g and the condensed water storage tank 2 is provided. A condensed water discharge pump 12h, which is a centrifugal pump, is interposed in the condensed water discharge pipe 12e, and a condensed water replenishment pump 12i, which is also a centrifugal pump, is interposed in the condensed water replenishment flow path 12f.

The condensed water discharge pump 12h is wired so as to rotate when the first micro switch 12c is turned on, and the condensed water replenishment pump 12i is wired so as to rotate when the second micro switch 12d is turned on. .

In the exhaust gas treatment apparatus according to the third embodiment, since the condensed water storage tank 2 and the water level detection pipe 12a communicate with each other, the inside of the condensed water storage tank 2 and the water level detection pipe 1 are connected.
The water level of 2a is almost the same. When the water level of the water level detection conduit 12a rises to a first predetermined level h _1, as shown by a solid line in FIG. 10, the first micro-switch 12c is turned on, the condensed water discharge pump 12h
Rotates and condensed water is discharged from the condensed water discharge passage 12e, so that the water level in the water level detection pipe 12a drops. On the other hand, the water level in the water level detection pipe 12a is the second predetermined level h.
_As shown by the two-dot chain line in FIG. 10, the second micro switch 12d is turned on, and the condensed water discharge pump 12i is rotated to rotate the condensed water tank 12g from the replenished water tank 12g through the condensed water replenishment flow path 12f. 2, water is replenished, and the water level in the water level detection pipe 12a rises.

Therefore, the water level inside the condensed water storage tank 2 does not become higher than the first predetermined level h ₁ .
It does not become lower than the second predetermined level h _2.

As described above, in the exhaust gas treatment apparatus according to the third embodiment, the height of the water surface of the condensed water storage tank 2 is set at the first predetermined level h ₁ and the second predetermined level h ₂ . Since it is held in the middle, a certain amount of water is always present in the condensed water storage tank 2. Therefore, in addition to the features of the exhaust gas processing device according to the first embodiment, even when the housing 1 is heated to a high temperature by the heat of the exhaust gas, the exhaust gas processing device has Has the feature that it can be reliably removed. 4. Fourth Embodiment FIG. 11 shows another example of the exhaust gas treatment apparatus in which the condensed water level adjusting means is provided in the exhaust gas treatment apparatus according to the first embodiment.
Shown in 11, the same reference numerals as those in FIG. 10 indicate the same components as those shown in FIG. 10. In the exhaust gas treatment device shown in FIG. 11, the condensed water level adjusting device 13 corresponds to the condensed water level adjusting means.

As shown in FIG. 11, the condensed water level controller 13 includes a water level detection pipe 13a, a float 13b, a first micro switch 13c, and a second micro switch 1c.
3d is the same as the condensed water level controller 12 provided in the exhaust gas treatment apparatus according to the third embodiment.

The condensed water level controller 13 further comprises:
The condensed water storage tank 2 has a condensed water storage tank 2 which is opened in the vicinity of the condensed water storage tank bottom plate 2D and discharges the condensed water, and a replenishment water tank 13g in which the replenished water to be replenished to the condensed water storage tank 2 is stored. And a condensed water replenishing line 13f that communicates the condensed water storage tank 2 with the replenished water tank 13g.

The distal end of the condensed water discharge pipe 13e is formed so as to face downward, and an electromagnetic valve 13h is interposed in the middle. On the other hand, the condensed water replenishment pipe 13f is open above the opening of the condensed water discharge pipe 13e in the condensed water storage tank 2. A solenoid valve 1 is connected to the condensed water replenishment line 13f.
3i is interposed. Replenishing water tank 13g are bottom, it is provided so as to be higher than the second predetermined level h _2. The solenoid valve 13h is configured such that the first microswitch 13c has an o
The solenoid valve 13i is opened so as to be opened when n, and opened when the second microswitch 13d is turned on.

In the exhaust gas treatment apparatus shown in FIG. 11, the water level in the water level detection pipe 12a, that is, the condensed water storage tank 2
When the water surface of the inner rises to a first predetermined level h _1, as shown by the solid line, the first micro-switch 13c is turned on, since 13h solenoid valve is open, also open condensate discharging passage 13e. Then, the condensed water inside the condensed water storage tank 2 is discharged to the outside through the condensed water discharge channel 13e by the action of gravity. On the other hand, when the water level in the water level detection pipe 13a drops to the _second predetermined level h2, the second micro switch 13d is turned on and the solenoid valve 13i is opened as shown by the two-dot chain line in FIG. Water is replenished from the replenishing water tank 13g to the condensed water storage tank 2 by gravity through the condensed water replenishing flow path 13f.

The exhaust gas processing apparatus according to the fourth embodiment has a feature that the configuration is simpler in addition to the features of the exhaust gas processing apparatus according to the third embodiment. 5. Fifth Embodiment Regarding an example of an exhaust gas treatment apparatus including a flat plate-shaped condensation plate provided in a direction perpendicular to the exhaust gas introduction direction,
This will be described below. FIG. 12 is a cross-sectional view of the exhaust gas treatment device taken along a longitudinal direction parallel to a horizontal plane, and FIG. 13 is a sectional view taken along a width direction of the exhaust gas treatment device parallel to a vertical surface. 12 and 13, the same reference numerals as those in FIGS. 1 and 2 indicate the same components as those shown in FIGS. 1 and 2.

As shown in FIGS. 12 and 13, the exhaust gas treatment device has a casing 1 similar to the exhaust gas treatment device according to the first embodiment. A condensed water storage tank 2 similar to the exhaust gas treatment apparatus according to the embodiment is provided integrally.

The housing 1 and the condensed water storage tank 2 are
E, and a partition plate 1F is provided between the housing bottom plate 1E and the ceiling plate 1G in the housing 1.

On the lower surfaces of the housing bottom plate 1E and the partition plate 1F, condensed water collecting pipes 5A and 5B are provided, respectively. Further, the casing bottom plate 1E and the partition plate 1F are provided with openings q along the condensed water collecting pipes 5A and 5B, and provided with openings q 'at positions corresponding to the openings q in the condensed water collecting pipes 5A and 5B. Have been.

At the center of the upper surfaces of the casing bottom plate 1E and the partition plate 1F, that is, the portion where the ridge is formed, five condenser plates 13 are arranged along the longitudinal direction of the casing 1. The condenser plate 13 is provided at right angles to the exhaust gas introduction direction indicated by an arrow a in FIG. Furthermore, the housing bottom plate 1
E and near the side wall 1H on the upper surface of the partition plate 1F,
A total of eight condensing plates 14, each of which is a flat plate-like condensing plate 14 extending from the side wall 1H toward the center of the housing 1, are provided for each one side wall 1H. As shown in FIG. 12, the condensing plate 14 is disposed so as to extend downstream from the side wall 1H of the housing 1 when viewed from above, that is, to extend upward in FIG.

FIG. 14 shows details of the edges of the condenser plates 13 and 14. As shown in FIGS. 12 to 14, C-shaped cylinders 13 </ b> A and 14 </ b> A are provided in a vertical direction at both end portions of the condenser plate 13 and an inner end portion of the condenser plate 14, respectively. Each of the C-shaped cylinders 13A and 14A is a C-shaped cylinder 3 in the exhaust gas treatment apparatus according to the first embodiment.
A is formed similarly to A. The edges of the condenser plates 13 and 14 where the C-shaped cylinders 13A and 14A are provided are C
Rolls 13B and 14B are formed on the downstream side of the mold cylinders 13A and 14A so that the gaps between the mold cylinders 13A and 14A are gradually reduced. C-shaped cylinder 13
Between A and the water flow entraining rib 13B, there are formed gaps 13C and 14C that become narrower as the distance from the entrance increases.

The lower ends of the C-shaped cylinders 13A and 14A are both inserted into the openings q and q '.

In the exhaust gas processing apparatus, the exhaust gas introduced from the exhaust gas introduction pipe 1C flows along the zigzag flow path formed between the condenser plate 13 and the condenser plate 14, and simultaneously exhausts the exhaust gas. The moisture in the gas is reduced by the condensation plates 13 and 14
Condensed on the surface on the upstream side to become condensed water.

The condensed water condensed on the upstream surfaces of the condensing plates 13 and 14 is blown toward the C-shaped cylinders 13A and 14A by the exhaust gas flowing along the surfaces of the condensing plates 13 and 14, and the water is entrained. It is sucked into the gaps 13C and 14C along the rib 13B.

The condensed water sucked into the gaps 13C and 14C is collected in the water collecting chamber 2A through the condensed water collecting pipes 5A and 5B and the condensed water outlet pipe 6, and stored in the condensed water storage tank 2.

The exhaust gas processing apparatus according to the fifth embodiment is
In addition to the features of the exhaust gas processing apparatus according to the first embodiment, the configuration of the condensing plate is simpler and easy to manufacture.

[0091]

According to the exhaust gas treatment apparatus provided by the present invention, the amount of water in the exhaust gas can be greatly reduced, so that the exhaust gas of a gasoline automobile containing a large amount of water can also be treated in the exhaust gas treatment apparatus. By removing water in advance by the device, the exhaust gas can be effectively purified for a long time by the exhaust gas purifying device proposed by the present applicant in Japanese Patent Application No. 11-270885.

In the exhaust gas treatment apparatus, since the exhaust gas impinges on the condenser plate to condense and remove water and the like on the surface of the condenser plate, the exhaust gas treatment apparatus is different from the water removal apparatus using a water absorbing agent. In contrast, there is almost no wear part, and the performance hardly deteriorates with time.

Further, condensable components other than water, such as hydrocarbons, can be removed by the exhaust gas treatment apparatus according to the present invention.

Furthermore, since the housing usually has a much larger cross-sectional area than the exhaust pipe, and the condensing plate also functions as a baffle plate, the exhaust gas treatment apparatus of the present invention is a high-performance muffler. Also works as Further, in the exhaust gas treatment device, the flow resistance is small, so that the output of the engine is less reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a cross section of an exhaust gas treatment apparatus according to a first embodiment of the present invention, which is cut in a horizontal direction along a longitudinal direction of a housing.

FIG. 2 is a diagram illustrating the exhaust gas treatment device shown in FIG. 1;
It is sectional drawing which looked at the cross section cut | disconnected in the width direction of the housing | casing from the upstream.

FIG. 3 is an enlarged top view showing details of an edge portion of a V-shaped plate and an outer plate provided in the exhaust gas treatment device.

FIG. 4 is a cross-sectional view showing a cross section of the vicinity of a water droplet collecting port provided in the exhaust gas treatment device, which is cut in a longitudinal direction of a housing.

FIG. 5 is a cross-sectional view showing a cross section of the portion of the exhaust gas treatment device cut in a width direction of a housing.

FIG. 6 is a schematic diagram showing a flow of exhaust gas inside the exhaust gas processing device.

FIG. 7 is a cross-sectional view taken along a longitudinal direction of an exhaust gas treatment device including a semi-cylindrical plate as a condensation plate.

FIG. 8 is an enlarged view showing details of a semi-cylindrical plate in the exhaust gas processing apparatus shown in FIG.

FIG. 9 is an enlarged view showing a state in which a semi-cylindrical plate is erected on a housing bottom plate or a partition plate of the housing.

FIG. 10 is a longitudinal sectional view showing an example of an exhaust gas treatment apparatus provided with a condensed water level control means.

FIG. 11 is a cross-sectional view cut in the width direction showing another example of the exhaust gas treatment apparatus provided with the condensed water level control means.

FIG. 12 is a cross-sectional view of a further example of the exhaust gas treatment apparatus according to the present invention, cut in a longitudinal direction along a horizontal plane.

FIG. 13 is a cross-sectional view showing a cross section of the exhaust gas processing apparatus shown in FIG. 12 cut in a width direction.

FIG. 14 is an enlarged view showing details of an edge portion of a condensing plate provided in the exhaust gas processing device shown in FIG. 12;

[Explanation of symbols]

 Reference Signs List 1 housing, 2 condensed water storage tank, 2A water collection chamber (condensed water induction flow path) 3 V-type plate (condensation plate) 3A C type cylinder (condensed water induction flow path) 3B water flow entrained rib (condensed water induction flow path) 3C Gap (condensed water guide channel) 4 Outer plate (condensate plate) 4A C-shaped cylinder (condensed water guide channel) 4B Water flow entraining rib (condensate guide channel) 4C Gap (condensate guide channel) 5A Condensate Water collecting pipe (condensed water guiding flow path) 5B Condensed water collecting pipe (condensed water guiding flow path) 6 Condensed water discharging pipe (condensed water guiding flow path) 8 Water droplet collecting port (condensed water guiding flow path) 8A Water droplet guiding plate (Condensed water guide channel) 8B Water droplet receiver (Condensed water guide channel) 9 Water droplet collecting gutter (Condensed water guide channel) 10 Condensed water outlet tube (Condensed water guide channel) 11 Semi-cylindrical plate (Condenser plate) 11A Semi-cylindrical plate body (condensing plate) 11B 13C C-type cylinder (condensed water guiding channel) 13C Condensing plate 13A C-shaped plate (condensed water guiding channel) 13B Water flow entraining rib (condensed water guiding channel) 13C Gap (condensed water guiding channel) 14 pipeline (condensed water induction channel)

Claims (6)

[Claims] 1. A housing through which exhaust gas flows, and a condenser provided inside the housing so that the flow of the exhaust gas collides with the housing, and condensing moisture in the exhaust gas to the surface. A plate; a condensed water storage tank for storing condensed water condensed inside the housing; and a condensed water condensed on the surface of the condensed plate, the condensed water being provided between the condensed plate and the condensed water storage tank. And a condensed water guide channel for collecting the condensed water and guiding the collected water to the condensed water storage tank. 2. The exhaust gas processing device according to claim 1, wherein the casing is formed so that the exhaust gas flows in a substantially horizontal direction. 3. The condensing plate according to claim 1, wherein the condensing plate is provided on a bottom surface of the housing and has a convex shape protruding upstream with respect to a direction in which exhaust gas is introduced into the housing. An exhaust gas treatment device according to item 1. 4. The condensed water guide channel extends vertically at both end portions of the condensing plate,
The exhaust gas treatment device according to claim 3, further comprising a gutter-like flow path that opens toward an upstream side with respect to a direction in which the exhaust gas is introduced into the housing. 5. The exhaust gas treatment device according to claim 3, wherein the condenser plate has a V-shaped cross section along a plane parallel to a bottom surface of the housing. 6. The condensing plates are arranged in two or more rows along a direction from an upstream side to a downstream side with respect to an exhaust gas introduction direction in the casing, and furthermore, are arranged at right angles to the direction. The exhaust gas treatment device according to any one of claims 1 to 5, wherein the exhaust gas treatment device is arranged alternately along a direction.