KR20060089388A - Flue duct for boiler - Google Patents

Abstract

The present invention relates to a flue for a boiler, the configuration of the exhaust pipe for discharging the exhaust gas to the outside through the exhaust hole formed in the end, and disposed outside the supply air to the inside of the facility through the air supply hole In the exhaust pipe end outer periphery of the exhaust pipe is formed, the structure of the double pipe including a supply pipe for blocking the foreign matter or draft through the exhaust pipe to the passageway of the exhaust pipe and the resulting within the exhaust pipe end A reverse flow blocking tube is disposed to prevent the formation of vortices in the outer periphery and backflow of the exhaust gas, and a smooth flow of fluid is induced and accelerated at the periphery of the exhaust pipe adjacent to both ends of the reverse flow blocking tube. Exhaust gas to allow the exhaust gas to be smoothly discharged to the outside of the exhaust pipe by the occurrence of a pressure difference Characterized in that dohom are formed, respectively.

According to the flue for the boiler of the present invention, it is possible to block the inflow of foreign matters or the outside air through the exhaust hole to prevent the exhaust gas flow back through the exhaust pipe, it is possible to properly guide the flow of the outside air There is an effect that the discharge of the exhaust gas can be made smoothly.

Flue, Vortex, Backflow, Air supply induction pipe, Backflow blocker, Exhaust induction groove

Description

Flue duct for Boiler}

1 is a front end perspective view of a flue for a boiler according to the present invention.

Figure 2 is a shear cross-sectional view of the main part of the flue for the boiler according to the present invention.

Figure 3 is a perspective view of the main part showing the exhaust flow path of the exhaust gas formed by the structure of the flue for the boiler according to the present invention.

4 is a shear cross-sectional view of a flue for a boiler according to the prior art.

<Description of Symbols for Major Parts of Drawings>

10: exhaust pipe 11, 12: exhaust induction groove

13: exhaust passage 14: exhaust hole

20: supply pipe 21: supply air

22: device side supply connection 23: end sealing ring

30: supply air inlet pipe 40: backflow blocker

41 Bracket 42 Exhaust end passage

The present invention relates to a flue for a boiler, in particular, by blocking the inflow of foreign matter or draft through the exhaust hole so that the exhaust gas does not flow back through the exhaust pipe, and induces the flow of the draft air to smoothly discharge the exhaust gas. It relates to the flue for the boiler made.

In general, flue gas for supplying external air to the exhaust gas generated during operation of the facility is combined with a facility such as a heating furnace or a boiler. In recent years, the flue which comprised the air supply and exhaust passage in the form of a double pipe is used widely.

Figure 1 shows the structure of a general flue in the form of a double tube according to the prior art. As shown in the drawing, the conventional flue for the boiler, the exhaust gas generated in the facility (not shown), such as a boiler induces a plurality of exhaust holes formed at the end, that is, the exhaust tower (Exhaust Top) 114 through the exhaust pipe 110 for discharging the exhaust gas to the outside and a plurality of air supply holes 121 formed on the outer periphery of the exhaust pipe 110 and formed on the outer circumference of the facility A configuration including a supply pipe 120 for supplying the external air into the interior of the.

In the conventional flue as described above, the air required for the operation of the facility is introduced through the air supply hole 121 of the air supply pipe 120 and supplied to the inside of the facility through the air supply connection portion 122 on the boiler side, and during the operation of the facility. The generated hot combustion gas (exhaust gas) flows along the exhaust passage 113 and is discharged through the exhaust hole 114.

In general, the exhaust gas can be discharged to the outside through the exhaust hole 114 by the density difference due to temperature even if the exhaust tower is not equipped with a forced exhaust fan, Accordingly, when the exhaust performance is lowered, the exhaust gas flows back along the exhaust passage 113 of the exhaust pipe 110 to contaminate indoor air and, in severe cases, may cause personal injury.

As described above, the outdoor air environment adversely affecting the exhaust gas can be classified into two types. The first factor is the case that the foreign matter such as rain, snow, hail or dust flows into the exhaust passage 113 through the exhaust hole 114, another factor is a typhoon, through the exhaust hole 114 Strong winds caused by gusts, whirlwinds, and the like directly flow into the exhaust passage 113, or large and small vortices are issued around the inside and outside of the exhaust tower due to the wind.

However, in a conventional boiler flue without a forced exhaust fan, the exhaust hole 114 is open to the outside, so that foreign matters or strong drafts are directly acted on the exhaust hole 114, thereby causing the foreign matters to be removed. The outside air flows toward the exhaust passage 113 or the outside air forms a vortex around the exhaust tower to hinder the smooth flow of the exhaust, and the outside air flows along the exhaust passage 113 through the exhaust hole 114 There was a problem such as contaminating indoor air by refluxing the exhaust gas.

The present invention has been made in order to solve the conventional problems as described above, the object is to be applied to a structure that is not equipped with a forced exhaust fan, the exhaust gas by blocking the inflow of foreign matter or draft through the exhaust hole The flue for the boiler which does not prevent the reverse flow through the exhaust pipe and induces the flow of draft air to facilitate the discharge of the exhaust gas, thereby further improving the safety and reliability of the facilities such as the boiler. To provide.

The present invention for achieving the above object, the exhaust pipe for inducing exhaust gas generated in a facility such as a boiler to discharge the exhaust gas to the outside through a plurality of exhaust holes formed at its end, and the outside of the exhaust pipe In the flue for the boiler of the double-pipe structure comprising an air supply pipe for supplying the external air to the inside of the facility by introducing external air through a plurality of air supply holes formed on the outer periphery, On the outer circumference of the exhaust pipe end, foreign matter or strong drafts such as rain, snow, hail or dust are prevented from entering the passage of the exhaust pipe through the exhaust hole, and thus vortex formation and exhaust gas around and inside the exhaust pipe end are caused. It is characterized in that the reverse flow blocking tube of the open type is fixed at both ends to prevent the reverse flow phenomenon.

In addition, an open air supply guide pipe is once fixed to an outer circumference of the air supply pipe at a portion where the air supply hole is formed so that foreign matter such as rain, snow, hail or dust can be prevented from entering the passage of the air supply pipe through the air supply hole. It is preferred to be arranged.

In addition, the exhaust pipe can be smoothly discharged to the outside of the exhaust pipe by the occurrence of a pressure difference with the surroundings by inducing and accelerating a smooth flow of the fluid on the outer circumference of the exhaust pipe adjacent to both ends of the backflow blocking pipe. It is preferable that arc-shaped exhaust induction grooves are formed to reduce the flow velocity of the draft which can be introduced through the open both ends of the backflow blocking tube.

Hereinafter, the flue for the boiler according to the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 are for explaining the structure and operation of the flue for the boiler according to the present invention, Figure 1 is a front perspective view of the flue for the boiler, Figure 2 is an exhaust tower for the main part of the flue for the boiler It is a front sectional drawing, and FIG. 3 is a perspective view of the principal part which shows the discharge flow path of the exhaust gas formed by the said flue for boiler.

The flue for a boiler according to the present invention is, as shown in the front end surface perspective view of FIG. 1 and the front end view of FIG. 2, an exhaust pipe 10 on the inside, an air supply pipe 20 on the outside of the exhaust pipe 10, and the air supply. It consists of an air supply induction pipe 30 which is covered on the outside of the air supply hole 21 of the engine 20, and the backflow blocking pipe 40 fixed to the outside of the exhaust tower which is an end of the exhaust pipe 10.

The exhaust pipe 10 induces exhaust gas generated in a facility such as a boiler (not shown), and exhaust passage 13 for discharging the exhaust gas to the outside through a plurality of exhaust holes 14 formed at an end thereof. ).

In addition, foreign matters such as rain, snow, hail or dust, or strong external air are formed on the exhaust passage of the exhaust pipe 10 at the outer circumference of the end of the exhaust pipe 10 at the portion where the exhaust hole 14 is formed. In order to block the inflow toward the side 13 and to prevent the vortex formation and the backflow of the exhaust gas around the end of the exhaust pipe 10 due to this, the backflow blocking pipe 40 of both ends is fixedly arranged. do. The backflow cutoff tube 40 is spaced apart from the outer circumference of the exhaust pipe 10 at a predetermined interval, and is supported by a bracket 41 formed at a predetermined interval on the circumference of the exhaust pipe 10 so as to be outside of the exhaust pipe 10. And an exhaust end passage 42 between the backflow cutoff tube 40.

On the outer circumference of the exhaust pipe 10 at a portion adjacent to both ends of the backflow cutoff tube 40, the exhaust gas is smoothly discharged to the outside of the exhaust pipe 10 by inducing and accelerating a smooth flow of the fluid by generating a pressure difference with the surroundings. The arc-shaped exhaust induction grooves 11 and 12 are formed, respectively, so as to reduce the flow velocity of the draft which can be introduced through the open both ends of the backflow cutoff tube 40.

On the other hand, the air supply pipe 20 is disposed on the outside of the exhaust pipe 10, the outside air flows through a plurality of air supply holes 21 formed on one outer periphery through the device-side air supply connection 22 The outside air is supplied to the inside of the facility. Both ends of the air supply pipe 20 are sealed by an end closure ring 23.

In addition, on the outer circumference of the air supply pipe 20 where the air supply hole 21 is formed, foreign matters such as rain, snow, hail or dust may be prevented from entering the passage of the air supply pipe 20 through the air supply hole 21. One open type air supply guide pipe 30 is fixedly arranged.

It will be described in detail by the accompanying drawings the flow of the supply and exhaust of the flue for the boiler according to the present invention configured as described above.

First, the air supply passage according to the year of the present invention, as shown in Figure 2, the air required to operate the equipment is introduced through the air supply hole 21 of the air supply pipe 20, the air supply connection portion 22 of the boiler side It forms a structure that is supplied to the inside through the installation. At this time, the air supply guide pipe 30 which is covered on the outer periphery of the air supply hole 21 serves to induce the inflow of external air and to prevent foreign substances from entering.

On the other hand, the exhaust flow path according to the flue of the present invention, as shown in Figures 2 and 3, after the high-temperature exhaust gas generated during the operation of the equipment flows along the exhaust passage 13, the exhaust hole 114 And through the exhaust end passage 42 to form a structure respectively discharged around the both ends of the backflow cutoff tube (40). At this time, the reverse flow blocking tube 40 may cover the exhaust hole 14 to block the wind blowing in a radial direction (circumferential normal direction) or a predetermined inclination angle therefrom and accompanying foreign matter. Will be.

In addition, the exhaust induction grooves 11 and 12 guide or induce and accelerate the smooth flow of the draft air flowing out of the exhaust hole 14 to maintain a relatively low pressure relative to the surroundings. Due to the pressure difference, the exhaust gas inside the exhaust tower may be smoothly discharged by being naturally drawn out of the exhaust pipe 10, that is, through both open ends of the backflow cutoff tube 40. By the flow of the exhaust gas, it is possible to reduce the flow velocity of the outside air which can be introduced to both ends of the backflow cutoff tube 40 to suppress the backflow phenomenon of the exhaust gas. The flow state of the exhaust gas and the draft can be easily understood with reference to the perspective view of FIG. 3.

According to the flue for the boiler of the present invention as described above, it is possible to significantly improve the exhaust efficiency by only the structural deformation of the flue itself without a forced exhaust fan. That is, by blocking the inflow of foreign matter or draft through the exhaust hole by the backflow blocking pipe fixed to the outside of the exhaust tower, the exhaust gas can be smoothly discharged without being flowed back through the exhaust pipe, as well as both ends of the backflow blocking pipe. Due to the action of the exhaust induction groove formed on the exhaust pipe circumferential surface of the exhaust pipe to properly guide the flow of the outside flow of the exhaust tower stabilizes the exhaust gas can be smoothly discharged, and thus coupled to the boiler, etc. It is effective to further improve the safety and reliability of the equipment.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this may be regarded as illustrative, and those skilled in the art may devise various modifications and equivalent embodiments therefrom. Therefore, these equivalent embodiments are also to be seen as included within the utility model registration claims of the present invention is quite natural. Therefore, the true scope of protection of the present invention should be determined only by the appended claims.

Claims (3)

An exhaust pipe for guiding exhaust gas generated in a facility such as a boiler and discharging the exhaust gas to the outside through a plurality of exhaust holes formed at an end thereof, and a plurality of air supply holes disposed on the outer circumference of the exhaust pipe In the flue for the boiler of the double pipe structure including a supply pipe for supplying the external air to the inside of the facility by introducing external air through the, The outer periphery of the exhaust pipe end prevents foreign substances such as rain, snow, hail or dust from entering the passageway of the exhaust pipe through the exhaust hole, thereby forming vortices and exhaust gas around and in the exhaust pipe end. The flue for boilers, characterized in that the back flow blocking pipe of the open end is fixedly arranged to prevent the reverse flow phenomenon. The method of claim 1, A flue for boilers, characterized in that the air supply guide tube of the open type is fixed to the outer periphery of the air supply pipe to block the foreign matter such as rain, snow, hail or dust from entering the passage of the air supply pipe through the air supply hole. . The method according to claim 1 or 2, In the outer periphery of the exhaust pipe adjacent to both ends of the backflow blocking pipe, the exhaust gas is smoothly discharged to the outside of the exhaust pipe by generating a pressure difference with the surroundings by inducing and accelerating a smooth flow of the fluid. Flue flue characterized in that each of the arc-shaped exhaust induction grooves formed to reduce the flow velocity of the draft can be introduced through the open both ends of the pipe.

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