JPH09273413A - Soot and dust eliminating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To grow up fine soot and dust so as to easily catch them by providing an intake passage for leading the exhaust, which includes the soot and dust, into a diffusion chamber for diffusing the exhaust, and providing a blow-down means for discharging the exhaust downward, and forming an exhaust passage for discharging the exhaust into the air of the upper part, and providing a filter between the diffusion chamber and the exhaust passage. SOLUTION: Exhaust flowing in a duct 18 enters a diffusion chamber 15 through a bent pipe 7 so as to be discharged downward. The exhaust is thus diffused for turbulent and the flowing speed is so remarkably lowered, so that the soot and dust in the exhaust are floated for long time inside of the diffusion chamber 15, repeat suction and connection mutually in the high temperature atmosphere, gradually grown up, enlarged less fine and so heavier, naturally fallen, and deposited on the bottom of the diffusion chamber 15. Fine soot and dust, while floating, are adhered to a filter 9. The soot and dust grown up on the filter 9 by mutual adhesion and connection are made heavier and fallen on the bottom of the diffusion chamber 15. When the soot and dust deposited on the bottom of the diffusion chamber 15 are increased in quantity, a cover 12 is opened and the soot and dust are taken out of a cleaning port 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust removing device, which is capable of capturing even small dust.

[0002]

2. Description of the Related Art An internal combustion engine such as a diesel engine is provided with a chimney for discharging exhaust gas into the atmosphere. As a chimney, a slate chimney with a low back pressure is used so that it can be released into the atmosphere as quickly as possible. Emission standards for materials are set, and emission standards are strictly controlled for each local government.

In a diesel engine, the emission standard is met by adjusting the fuel injection timing and selecting the fuel used, so that the dust particles adhering to the inside of the chimney, the silencer and the pipe smoke guide grow to the size of the ping-pong ball. May be discharged from the chimney, which is a problem.

It takes a great deal of money to remove the dust in the chimney,
Systems such as flue gas secondary combustion system, electrostatic dust collection system, static electricity removal system, air filter (honeycomb, flat, winding) system are used.

FIG. 4 shows the structure of a conventional dust removing device.
This is so that the air is blown from the air outlet 1 while the exhaust gas is sucked from the air inlet 2, the exhaust gas moves downward along the spiral, then rises, and is discharged from the chimney 3 through the wire mesh filter 5. The soot dust in the exhaust gas naturally falls in the chamber 4 and accumulates in the container 6.

[0006]

However, the conventional soot and dust removing device can remove only large soot and dust because it has the idea of releasing exhaust gas into the atmosphere as quickly as possible and not the idea of growing soot and dust to a large extent.

Therefore, an object of the present invention is to provide a soot and dust removing device which solves the above problems.

[0008]

In order to achieve such an object, the structure of the invention according to claim 1 is to make the soot dust float for a long time and grow small soot dust by adsorbing and binding the soot dust to make it large. In addition, while providing an intake passage for introducing the exhaust gas into the diffusion chamber and providing a blow-down means for discharging the exhaust gas downward, an exhaust passage for discharging the exhaust gas upward is provided, and small dust particles are generated. A feature is that a filter is provided between the diffusion chamber and the exhaust passage so as not to be released into the atmosphere as it is.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 is a block diagram showing the arrangement of a dust removing apparatus according to the present invention.
3 to FIG. As shown in FIG. 1, a diffusion chamber 15 is formed by a container 14 made of a calcium silicate plate.
An exhaust passage 17 is formed by the chimney 16 integrally formed on the above. A hole is formed in the side surface of the container 14, and an intake passage 19 for introducing exhaust gas from the diesel engine into the diffusion chamber 15 is formed by the duct 18 inserted in the hole. In order to discharge the exhaust gas downward in the diffusion chamber 15, an L-shaped bend pipe 7 is attached to the tip of the duct 18 as a blow-down means. Inside the bend pipe 7, a plurality of arc-shaped straightening plates 8 are provided for changing the flowing direction of the exhaust gas from the horizontal direction to the downward direction.

A filter 9 is attached to the bend pipe 7 in order to prevent small soot dust from moving from the diffusion chamber 15 toward the exhaust passage 17 and being released into the atmosphere as it is. The crimp wire net shown in FIG. 3 is used as the filter 9. This is an outer frame provided with a stainless steel wire 10 having an outer dimension of 2 mm as a mesh of 2 meshes, and a space between the outer frame of the filter 9 and the container 14 is about 10 m.
A gap of m is formed.

Since soot dust accumulates on the bottom of the diffusion chamber 15,
A cleaning port 11 and a lid 12 for taking out soot and dust are provided. A water drain hole 13 is formed in the bottom of the diffusion chamber 15.

Next, the operation of such a dust removing device will be described. As shown in FIG. 2 which is an enlarged view of a main part of FIG.
The exhaust gas flowing inside enters into the diffusion chamber 15 through the bend pipe 7 and is discharged downward. As a result, the exhaust gas is turbulently diffused and the flow velocity is remarkably reduced, and the dust particles in the exhaust gas are suspended in the diffusion chamber 15 for a long period of time, and due to the high temperature atmosphere, the dust particles are repeatedly adsorbed and bonded to each other and gradually grow to become larger. As the weight increases, it falls naturally and accumulates on the bottom of the diffusion chamber 15. The small soot 20 adheres to the filter 9 while floating, and the soot and dust are adsorbed and combined with each other to cause the filter 9 to adhere.
The soot and dust that have grown above become heavier and become
Fall to the bottom of.

In the unlikely event that secondary combustion occurs in the diffusion chamber 15, the volume of exhaust gas in the diffusion chamber 15 increases, but a 10 mm gap is formed between the filter 9 and the container 14. Therefore, the exhaust gas is not discharged from this portion and the pressure inside the diffusion chamber 15 does not rise.

When the amount of dust accumulated on the bottom of the diffusion chamber 15 increases, the lid 12 is opened and the dust is taken out from the cleaning port 11.
If a large amount of dust is attached to the filter 9, the filter 9 is removed, washed, and then attached again. The filter does not need to be replaced because it can be used repeatedly if washed, and maintenance costs are low.

A hexagonal wire mesh or the like may be used as the filter.

[0017]

As can be seen from the above description, claim 1
According to the soot-dust removing device according to the above, since the soot-dust is adsorbed and bonded by discharging the exhaust gas downward in the diffusion chamber and suspending the soot-dust for a long time, small soot-dust can be grown and captured. Moreover, the facility cost is low. Also,
Since the filter captures small soot, almost no soot is released into the atmosphere.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a dust removing device according to the present invention.

FIG. 2 is an enlarged view of a main part in an embodiment of the dust removing device according to the present invention.

FIG. 3 is a plan view and FIG. 3B is a front view of a filter in an embodiment of a dust remover according to the present invention.

FIG. 4 is a configuration diagram of a conventional dust removal device.

[Explanation of symbols]

 7 ... Bend pipe 9 ... Filter 15 ... Diffusion chamber 17 ... Exhaust passage 19 ... Intake passage

Claims (1)

[Claims] 1. A diffusion chamber for diffusing exhaust gas containing soot and dust and an intake passage for introducing the exhaust gas to the diffusion chamber are provided, and the exhaust gas introduced from the intake passage is discharged downward of the diffusion chamber. A blow-down means for discharging the exhaust gas, an exhaust passage for discharging the exhaust gas to the atmosphere is formed from the diffusion chamber to the atmosphere above, and a filter is provided between the diffusion chamber and the exhaust passage. A dust removal device.