JPS643963Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a stack crane prevention device that is installed in a chimney and prevents the stack crane phenomenon.

[Prior art and problems]

In order to prevent the occurrence of the static rain phenomenon, the following types of static rain prevention devices are generally known, which are installed in chimneys and separate and collect the moisture contained in the exhaust gas flow flowing through the chimney as droplets. .

The exhaust gas airflow 3 is forcibly swirled by a drifting plate 2 installed in the chimney 1 to increase the chances of the exhaust gas coming into contact with the inner wall surface 1a of the chimney 1. The contained moisture is condensed by collision with the inner wall surface 1a and adheres to the inner wall surface 1a as droplets, and is then collected by a drainage device 4 provided along the inner wall surface 1a and discharged to the outside. . (See Figure 1) A drift plate 2 and a collection plate 5 made of a perforated plate are provided in the chimney 1 and on the inner wall surface 1a, and the drift plate 2 causes the exhaust gas airflow to collide with the collection plate 5.
The moisture contained in the exhaust gas is deposited as droplets.
The droplets adhering to the collection plate 5 are removed by a suction device 6
, and after passing through the collection plate 5 , it is sent to the water collection device 8 through the connection pipe 7 . (See Figure 2) However, because it is expected that the exhaust gas airflow collides with the inner wall of the chimney, forming droplets and adhering to the inner wall, there are cases where the droplets do not adhere and the moisture contained in the exhaust gas. It is difficult to collect everything. Furthermore, droplets adhering to the inner wall surface may enter the exhaust gas again before being collected in the drainage device.

Then, the droplets adhering to the collection plate can be reliably discharged by the suction device, and since the exhaust gas is always sucked through the collection plate, it is possible to collect more water content. However, it is a large-scale device that requires a collection plate, a suction device, and a water collection device, resulting in high equipment costs, and the operation cost of the suction device is also high, making the entire device expensive.

In addition, in both cases, the exhaust gas airflow is swirled or sucked, which increases the ventilation resistance in the chimney and deteriorates the exhaust efficiency.

[Purpose of invention]

This device was devised in view of the above-mentioned circumstances, and its purpose is to have a simple structure, not require a large-scale device, and to be able to reliably collect the contained moisture as droplets, thereby increasing the ventilation resistance inside the chimney. An object of the present invention is to provide a stack crane prevention device that causes less damage.

[Structure of the idea]

According to this idea, the deflection plate gives the exhaust gas airflow disturbance and collision with the inner wall surface of the chimney.
The deflection plate is formed with a demister provided therein so that the exhaust gas airflow can pass therethrough, and is also formed so as to minimize the increase in ventilation resistance. The demister collects and discharges the droplets that adhere to the deflection plate when the exhaust gas airflow is disturbed and the droplets that adhere to the demister when it passes through the demister, and also collects and discharges the droplets that adhere to the inner wall when it collides with the inner wall surface. This removes moisture contained in exhaust gas.

〔Example〕

This invention will be explained below with reference to illustrated embodiments.

The stack crane prevention device 9 is provided at the upper end of the chimney 1 and includes a plurality of drift plates 10 and a drain groove 11 attached to the inner wall surface 1a of the chimney 1 above the drift plates 10. (See FIG. 3) Although the passage hole 16 is a long hole in this embodiment, it may be a circular hole.

The drift plate 10 has an approximately isosceles triangular cross-section [Fig. 4 a] and an egg-shaped cross section [Fig. 4 b], and has a hollow portion 12 with a top 17 at the bottom of the chimney, so as to reduce the ventilation resistance in the chimney 1 as much as possible. ] is formed.
A demister 13 is provided in the upper part of the hollow portion 12, and a passage hole 16 communicating with the demister 13 is provided at the demister mounting position on the upper side 14 and both sides 15, 15 of the drift plate 10.
(Refer to FIG. 4) This drift plate 10 has a plurality of first rows arranged at predetermined intervals so that the upper sides 14 are on the same line, and directly above the first rows so that the upper sides 14 are also on the same line and at predetermined positions. A plurality of second rows are installed so that the top portions 17 are located between the deflection plates 10 of the first row at intervals. (See FIG. 3) The collection of moisture contained in the exhaust gas flow 18 by the stack rain prevention device 9 is performed as shown in FIGS. 5 and 6.

That is, the exhaust gas flow 18 that has traveled straight through the chimney 1
When the air enters the group of deflector plates 10 attached in two rows, upper and lower, as described above, it is disturbed and converted into an air current that impinges on the inner wall surface 1a at both side edges 15, 15. A part of the air passes through the demister 13 from the through holes 16 at both side edges 15, 15 and is discharged to the upper side 14.
This air current flows upward through the passage hole 16.

The water contained when disturbed becomes droplets and adheres to both sides 15, 15 of the drift plate 10, passes through the passage hole 16 into the demister 13, is collected below the space 12, and is discharged to the outside.

Further, the moisture contained when colliding with the inner wall surface 1a becomes droplets and adheres to the inner wall surface 1a, travels along the inner wall surface 1a, is collected in the drain groove 11, and is discharged to the outside.

Further, the water contained when entering through the passage holes 16 on both sides 15, 15 and coming out through the passage holes 16 on the upper side 14 becomes droplets in the demister 13, collected below the space 12, and discharged to the outside.

In this way, the moisture contained in the exhaust gas is removed.

Note that the method of attaching each drift plate 10 is not limited to that of this embodiment, and may be attached in any manner as long as it can cause disturbance in the exhaust gas airflow and collision with the inner wall surface of the chimney. However, in order not to increase the ventilation resistance inside the chimney 1, something like this embodiment is considered to be optimal.

Further, the structure such as the cross-sectional shape of the drift plate 10 is not limited to that of this embodiment, and any structure may be used as long as it is possible to provide a demister inside and allow the exhaust gas airflow to pass through the demister. good. Any cross-sectional shape may be used as long as the cross-sectional shape does not increase ventilation resistance and can cause the exhaust gas airflow to be disturbed and collide with the inner wall surface.

Further, in this embodiment, the stack rain prevention device is attached to the upper end of the chimney, but it may be installed anywhere within the chimney. However, the contained moisture floating in the chimney,
Since there are many at the top of the chimney, it is desirable to install it at the top of the chimney.

[Effect of idea]

This invention has the above configuration and has the following effects.

It has a simple structure consisting of a plurality of flow deflection plates, and the moisture contained in the exhaust gas can be collected simply by passing the exhaust gas through the plurality of flow deflection plates.

The deflection plate provides disturbance to the exhaust gas airflow and causes it to collide with the inner wall of the chimney, and also allows the exhaust gas airflow to pass through the built-in demister, so it reliably separates and collects the moisture contained in the exhaust gas in the form of droplets. can. Furthermore, since the chimney is formed so as not to increase the ventilation resistance within the chimney, the exhaust efficiency will not be deteriorated.

[Brief explanation of the drawing]

Figures 1 and 2 are schematic diagrams showing a conventional stack crane prevention device, Figure 3 is a schematic sectional view showing the prevention device of this invention installed at the upper end of a chimney, and Figure 4a is a diagram of the structure shown in Figure 3. A detailed perspective view of section A, FIG. 4b is a sectional view showing another aspect of the drift plate, FIG. 5 is a schematic sectional view showing the flow of exhaust gas airflow, and FIG. 6 is a detailed sectional view of section B in FIG. 5. . 1... Chimney, 1a... Inner wall surface, 2... Straight flow plate, 3... Exhaust gas airflow, 4... Drainage device, 5... Collection plate, 6... Suction device, 7... Connection pipe, 8... Water collection device, 9... Stud crane prevention Device, 10... Straight flow plate, 11... Drain groove, 12... Hollow part, 13... Demister, 14... Top side, 15... Side side, 16... Passing hole, 17... Top part.

Claims (1)

[Claim for Utility Model Registration] This is a stack crane prevention device installed in a chimney to collect moisture contained in the exhaust gas airflow, and which disturbs the exhaust gas airflow and removes the moisture from the chimney inner wall in order to separate the contained moisture as droplets. It is composed of a plurality of deflection plates that are formed to allow the exhaust gas to collide with the chimney and to allow the exhaust gas airflow to pass into the chimney without increasing the ventilation resistance inside the chimney. A stack crane prevention device characterized in that a demister is installed at a position where the exhaust gas airflow passes.