JP2001321627A - Device for removing dust from exhaust gas - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost and highly practical device for removing dust from an exhaust gas with with black particulates and dust contained in engine exhaust gas are removed to clean the gas, capable of efficiently removing dust even by the compact and simple device without need for heating energy and which is automatically cleaned by self cleaning. SOLUTION: A hollow cylindrical strainer is set in a device-body case provided with an exhaust gas inlet and outlet for introducing the exhaust gas and discharging it from the other end. An annular passage is formed between the inner wall of the case and the outer face of the strainer, and the exhaust gas introduced from the inlet is passed through the fine passages of the strainer from the annular passage and discharged through an internal passage. The water for adsorbing the dust is stored at the bottom of the case so that the lower part of the strainer is dipped in the water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas dust removing apparatus for cleaning exhaust gas discharged from engines such as vehicles and ships, particularly diesel engines, by removing dust contained therein.

[0002]

2. Description of the Related Art In a diesel engine of an automobile, black particulates contained in exhaust gas are discharged into the air as dust, so that the air pollution becomes severe and the problem of pollution is greatly highlighted.

Conventionally, as a method of removing dust from engine exhaust gas, there are known a method in which black fine particles are passed through a high-temperature chamber to reheat and re-burn, and a method in which black fine particles are separated and removed by a filter.

[0004]

However, the above-described reheating method requires a separate heating device and heating energy, is expensive, and has the drawback that the entire device becomes large.
In the filter method, since the filter uses an element such as a mesh or a fibrous material, the filter tends to be clogged with fine particles, so that the element needs to be replaced and cleaned frequently, which is not practical. Had a point.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to efficiently use a small and simple device without requiring heating energy. Another object of the present invention is to provide an exhaust gas dust removing apparatus which can perform dust removal, can be automatically cleaned by a self-cleaning action, is inexpensive in cost, and has high practicality.

[0006]

In order to achieve the above object, an exhaust gas dust removing device according to the present invention is provided in a main body case having an exhaust gas inlet and an exhaust gas outlet for introducing exhaust gas and discharging the exhaust gas from the other end. , Equipped with a hollow cylindrical strainer,
An annular passage is formed between the inner wall of the main body case and the outer surface of the strainer so that the exhaust gas introduced from the exhaust gas inlet passes through the fine passage of the strainer from the annular passage and is discharged from the outlet through the internal passage. It is constituted and stores the water for dust adsorption so that the lower part of the strainer may be immersed in the bottom of the main body case.

Preferably, the strainer comprises a hollow cylindrical coil spring in which a wire is densely wound at a fine pitch.

Further, it is preferable that the strainer is held in a cushioned manner with respect to the main body case.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An exhaust gas containing fine dust particles is introduced into a main body case, and is separated by passing through a fine passage portion of a strainer composed of a coil spring. The inner and outer surfaces of the cylindrical portion of the strainer are constantly wet with water by capillary development. For this reason, the fine particles are easily attached to the surface by the water.

In addition, the vibration of the engine is transmitted to the entire apparatus, and the surface of the strainer is washed away by the rebound of the pool water due to the resonance of the coil spring, thereby preventing clogging with fine particles. Also, clogging of the fine particles can be prevented by a change in expansion and contraction of the coil spring. In addition, water vapor evaporates due to the temperature of the exhaust gas, causing water vapor to enter the main body case, and this water vapor adheres to the inner and outer surfaces of the strainer to form a film of water. Dissolve in pool water. The clean exhaust gas is discharged from the hollow portion of the strainer to the outside air via an exhaust gas outlet.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of an exhaust gas dust removing apparatus according to the present invention, and FIG. 2 shows another embodiment.

In FIG. 1, reference numeral 10 denotes a main body case in which a cylindrical body is formed in an upright shape.
1, and an exhaust gas outlet 12 is provided in the upper end plate 13. The exhaust gas inlet 11 is connected to an exhaust pipe or a muffler (both not shown) of the engine through a pipe, and the exhaust gas outlet 12 is open to the outside air.

Reference numeral 20 denotes a hollow cylindrical strainer provided in the main body case 10, and as shown in FIGS. 1 and 3, a wire rod is densely wound at a fine pitch to form a hollow cylindrical coil spring. . Strainer 20 made of this coil spring
Is formed by coupling a strainer portion (S) in which most of the lower portion from the upper end portion is coil-wound at a fine pitch, and a buffer holding portion (C) having a wider pitch below the strainer portion (S).

A strainer 2 is provided at the bottom of the main body case 10.
The storage water (W) for dust adsorption is accommodated so that the lower part of 0 is immersed.

A stopper 15 is provided at the bottom of the strainer 10, and the stopper is opened and closed so that water can be supplied and drained, and the inside can be cleaned.

The strainer 20 shown in FIG. 2 is formed in a cylindrical shape with a perforated plate, mesh or other air-permeable material, and is characterized in that exhaust gas is forcibly passed through the fine passage portion (P). It performs the same function as the strainer composed of the coil spring. In this strainer, a buffer spring 23 is provided at the bottom to hold the whole as a buffer.

The outer peripheral surface of the strainer 20 and the main body case 10
An exhaust gas containing fine particles is introduced into the annular passage 21 from the gas inlet 11 through the fine passage portion P such as a mesh, etc. Be sorted out.

When a large amount of fine particles accumulates in the stored water W at the bottom of the main body case 10 and the water activity decreases or starts to decrease, the stopper 15 is opened for draining the stored water mixed with the fine particles and the water is exchanged. Do. The strainer 20 hardly needs to be replaced, and the same effect as a new product can be obtained only by replacing the water.

As a measure for preventing an increase in the exhaust pressure, the increase in the pressure inside the main body case can be suppressed by making the total sectional area of the fine passage portion P of the strainer 10 larger than the sectional area of the diameter of the muffler pipe. In the case of a strainer using a coil spring, a spring in which the fine pitch interval of the coils is larger than the cross-sectional area of the muffler pipe is used. In the embodiment shown in FIG. 1, the strainer has one coil spring. However, a plurality of coil springs may be used, and the shape thereof may be a non-circular coil spring, a coiled spring with a wave, or a conical shape. It is also possible to use a deformed coil spring such as a coil spring.

Experimental Results 1 The temperature of the exhaust gas increased the temperature of the apparatus, and as a result, the stored water evaporated and the effect of water vapor was confirmed. 2. When the engine is started with the exhaust opening of the muffler pipe covered with a white cloth, the white cloth immediately turns black. In this state, the apparatus was attached to a muffler, and a test was performed by attaching a similar white cloth to the outlet 12 of the apparatus. As a result, it was confirmed that the apparatus did not change to black. 3. After completion of the test in 2 above, as a result of disassembling the device and inspecting the inside, it was confirmed that a large amount of fine black powder adhered to the strainer cylindrical portion facing the upper part from the stored water, and the stored water was stained black. .

[0022]

Since the present invention is constructed as described above, heating energy is not required, dust can be efficiently removed with a small and simple device, and the strainer can be clogged by a self-cleaning action. Thus, it is possible to provide an exhaust gas dust removing device that can be used for a long time without requiring frequent replacement and cleaning as in the related art, can be inexpensive, is economical, and has high practicality.

[Brief description of the drawings]

FIG. 1 is an overall vertical side view showing an embodiment of an exhaust gas dust removing apparatus of the present invention.

FIG. 2 is a vertical sectional side view showing a second embodiment of the device of the present invention.

FIG. 3 is a front view of a strainer used in the apparatus of the present invention, which is made by using a coil spring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main body case 11 Exhaust gas inlet 12 Same exit 20 Strainer 21 Annular passage 22 Internal passage 23 Buffer spring P Fine passage W Water storage

Claims (3)

[Claims] 1. A hollow cylindrical strainer (20) is provided in a body case (10) provided with an exhaust gas inlet (11) and an exhaust gas outlet (12) so as to introduce exhaust gas and discharge the exhaust gas from the other end. An annular passage (21) is formed between the inner wall of the main body case and the outer surface of the strainer to allow the exhaust gas introduced from the exhaust gas inlet (11) to pass through the fine passage (P) of the strainer and to be discharged to the outlet (12). ), And the water (W) for dust absorption is stored in the bottom of the main body case (10) so that the lower part of the strainer (20) is immersed. Exhaust dust removal equipment. 2. The exhaust gas dust removing device according to claim 1, wherein said strainer (20) is a hollow cylindrical coil spring in which a wire is densely wound at a fine pitch. 3. The exhaust gas dust removing device according to claim 1, wherein the strainer (20) is held in a buffered manner with respect to the main body case (10).