JPS63273720A - Circular nozzle for exhaust cylinder of stack - Google Patents

Abstract

PURPOSE:To send out exhaust gas flowing in a dust without touching an inner wall by a method wherein air is supplied to a circular nozzle for the exhaust gas of a stack, which is placed on the way to a stack, from an air blasting device such as a blower, etc. and air forming straight streams with uniform velocity is ejected to form a fresh gas membrane on the inner surface of an cylinder. CONSTITUTION:A circular nozzle 1 for stack exhaust cylinder has the stack connected to stack connection flanges 6 and the nozzle 1 is used in the condition that the nozzle is placed on the way to the stack. That is, when air is supplied from an air blasting device such as a blower, etc. while the stack is in use, air flowing into an air stream distributor from an air supply port 9 is discharged from a ring-shaped ejecting slits 8 as the air forming straight streams with uniform velocity by an air stream distributing action of each air stream distributing fin 10 and forms a fresh gas membrane on the inner surface of an inner cylinder along the inner wall of the stack. Since negative pressure perpendicular to the inner surface of the stack is generated on the inner surface of the stack by this ejecting flow velocity, exhaust gas flowing in the inner part is sent without touching the inner wall by an air-absorbing action accompanying the negative pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a circular nozzle for a chimney exhaust stack, which is related to a technology for preventing dust and the like from adhering to the inner walls of a chimney exhaust stack and an exhaust duct.

[Conventional technology]

BACKGROUND ART Transfer means such as chimney stacks and exhaust ducts have conventionally been used as structures for transferring exhaust gas. but,
With these transfer methods, the fine particles remaining in the gas adhere to and grow on the inner wall of the chimney or exhaust stack, gradually becoming larger in size, and are finally released as free gases, so the corrosive gases remaining in the combustion gas of general boilers In the case of exhaust gas after desulfurization treatment, there is a problem in that the inner wall surfaces of chimneys and exhaust ducts are corroded, significantly impairing their durability.

[Problem that the invention seeks to solve]

The present invention has been developed in view of the above problems, and is capable of preventing exhaust gas and fine particles from adhering to the inner walls of chimney stacks and exhaust ducts, and is particularly capable of preventing high-temperature gas, gas containing a large amount of dust, or The object of the present invention is to provide a circular nozzle for a chimney exhaust stack that exhibits an excellent effect in transferring corrosive gas into a pipe.

[Means for solving problems]

The circular nozzle for a chimney exhaust stack according to the present invention is installed in the middle of a chimney exhaust stack and an exhaust duct, and has an annular discharge slit opening along the inner wall of the chimney exhaust stack or exhaust duct. A large number of airflow distribution fins are arranged between the air supply port communicating with the annular discharge slit and the annular discharge slit, and the annular discharge slit 1 to
The gist is that the structure is such that air is ejected at a uniform flow rate from the mouth to all parts.

[Created for]

In other words, when a chimney exhaust stack or exhaust duct is in use, when air is supplied from a blower such as a blower to a circular nozzle for the chimney exhaust stack installed in the middle, the inner wall of the chimney exhaust stack or exhaust duct is Air is discharged from the annular discharge slit to form a linear flow with a uniform flow rate, forming a fresh gas film on the inner surface of the cylinder. This discharge flow rate generates negative pressure on the inner surface of the chimney exhaust stack and exhaust duct, and the intake action accompanying this negative pressure causes the exhaust gas flowing through the duct to be sent without coming into contact with the inner wall. .

〔Example〕 .

Hereinafter, embodiments of the circular nozzle for a chimney exhaust pipe according to the present invention will be described with reference to the drawings. FIGS. 1 and 2 show a circular nozzle installed in the middle of a chimney exhaust pipe.

The circular nozzle 1 for a chimney exhaust stack has a flat box shape with a side plate 3 provided on the circumferential side of a square face plate 2゜2, and a chimney connecting flange 6.6 is formed at each end in the center of each face plate 2. It is formed by protruding connecting tubes 4 and 5.

An inner cylinder 7 is provided concentrically on the inner periphery of the connecting cylinder 4, and an annular discharge slit 8 communicating with the inner cavity is opened. ), and the air supply port 9 and the annular discharge slit 8 are communicated with each other through the inner cavity. As shown in FIG. 2, the inner cavity has a large number of airflow distribution fins 10, 10, .
The distances Ll, L2, .

The circular nozzle 1 for a chimney exhaust stack having the above configuration has the chimney 50 connected to each of the chimney connection flanges 6.6, and the circular nozzle 1 for a chimney exhaust stack is inserted in the middle of the chimney 50. It is what you use.

That is, when the chimney 50 is used, a blower such as a blower (not shown) is used.
When air is supplied from the air supply port 9 to the airflow distribution section 11, the air flows through the annular discharge slit 8 to form a linear flow with a uniform velocity due to the airflow distribution action of each airflow distribution fin 10, 10... is discharged to form a film of fresh gas on the inner surface of the cylinder along the inner wall of the chimney 50. This discharge flow rate generates a negative pressure on the inner surface of the chimney 50 perpendicular to the surface, and the exhaust gas flowing inside the chimney 50 due to the suction action caused by the negative pressure is sent without coming into contact with the inner wall.

Next, FIG. 3 shows an embodiment in which a circular nozzle for a chimney exhaust stack according to the present invention is used in the middle of an exhaust duct 51, and a description of the structure will be omitted since it is the same as the previous embodiment.

In this exhaust duct, for example, the inner periphery of the circular nozzle 1 for a chimney exhaust stack attached to a wall has an inner tube 7 and no structure such as a fan, so the device is less contaminated and can be used as a household ventilation fan. can also be used.

〔Effect of the invention〕

As described above, the circular nozzle for chimney exhaust stack of the present invention is
Due to the airflow distribution action of the airflow distribution fins, air is discharged from the annular discharge slit opening along the inner wall of the chimney exhaust stack or exhaust duct to form a linear flow at a uniform velocity, forming a film of fresh gas on the inner surface of the cylinder. Therefore, it is possible to prevent exhaust gas and particulates from adhering to the inner walls of chimney exhaust stacks and exhaust ducts, etc., and it has an excellent effect in transferring high-temperature gas, gas containing a large amount of dust, or corrosive gas into the pipe. The effects of the present invention are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment in which a circular nozzle for a chimney exhaust stack according to the present invention is provided in the middle of a chimney exhaust stack, FIG. 2 is a plan cross-sectional view of the circular nozzle for a chimney exhaust stack, and FIG. It is a perspective view which shows the Example used in the middle of an exhaust duct. 1... Circular nozzle for chimney exhaust pipe 2... Face plate 3... Side plate 4, butt... Connection tube 7... Inner tube 8... Annular discharge slit port 9... Air supply port 1o.・Airflow distribution fin 11
... Airflow distribution part 5o ... Chimney 51 ... Exhaust duct 1 7 = Engraving of drawings Fig. 2 Fig. 8 Procedural correction system 1. Case Description 1985 Patent Application No. 108435 2 Title of Invention Circular Nozzle for Chimney Stack 3 Name of Person Making Amendment Name Chiben Kotobuki 4 Agent

Claims (1)

[Claims] An annular discharge slit is installed in the middle of a chimney exhaust stack or exhaust duct, and an annular discharge slit is opened along the inner wall of the chimney exhaust stack or exhaust duct, and an air supply port and the annular discharge slit are connected to an air blower such as a blower. A circular shape for a chimney exhaust stack characterized by comprising a large number of airflow distribution fins disposed between the annular discharge slits toward the annular discharge slit opening, and having a structure that blows out air at a uniform flow rate from the annular discharge slit opening to each part. nozzle.