JPS606682B2 - Exhaust gas purification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for purifying exhaust gas containing soot and dust, and more specifically, the present invention relates to a device for purifying exhaust gas containing soot and dust, and more specifically, a layer filled with particulate matter to be treated for exhaust gas is inclined obliquely and is spaced at appropriate intervals to maintain an angle of repose. It has a mechanism for discharging particulate matter by providing a plate, with the upper surface of the packed bed being a surface formed by the angle of repose of the particulate matter, and the lower surface being supported by a porous material that allows exhaust gas to pass through but does not allow particulate matter to fall. This relates to a device that processes exhaust gas by flowing it from an upper surface to a lower surface.

BACKGROUND OF THE INVENTION Many devices have been proposed and implemented in the past for treating exhaust gas by bringing it into contact with particulate materials such as catalysts and adsorbents.

However, most of them were for so-called clean exhaust gas that does not contain soot and dust. In recent years, treatment of exhaust gas containing soot and dust has been requested and implemented from the viewpoint of pollution prevention. For example, treatment of sulfur oxides and nitrogen oxides in boiler exhaust gas, and various malodorous substances from chemical manufacturing processes.
In most cases, these 0 contain fine solids, that is, soot dust, in the exhaust gas, so it has been difficult to stabilize the removal process for a long period of time in conventional equipment due to the clogging. For this reason, it was necessary to stop the entire apparatus and clean the clogged area. If the equipment is used in a data production process, stopping the equipment will only result in no product being produced, but if it is a pollution control equipment, harmful substances will inevitably be emitted into the atmosphere during the shutdown, which is socially inconvenient. As a result of research, we have come up with this invention to meet these demands.
Ru. Most conventional devices usually use porous materials at the top and bottom or front and back to support particulate matter, but when these devices treat exhaust gas containing soot and dust, the porous material in the exhaust gas introduction section or There was a drawback that clogging occurred between the particulate materials. According to the device of the present invention, no porous material is used in the exhaust gas introduction section, so there is no clogging. Furthermore, even if particulate matter in the exhaust gas introduction section becomes clogged with soot and dust, the particulate matter is easily moved and a new angle of repose plane is formed by new particulate matter, so that the clogging can be immediately cleared. In the present invention, the porous material used for the exhaust gas discharge part of the packed bed is obliquely inclined, and its surface is constantly self-cleaned by the movement of particulate matter. As a result, even if there is an increase in pressure loss in the packed bed due to slight clogging, it can be restored to the original base. As the porous material at the bottom of the packed bed, any material can be used as long as it basically allows exhaust gas to pass through but does not allow particulate matter to fall, but the preferred forms are round holes, square holes, herringbone holes, and slit hole types. Punching plates, slits, wire mesh, lastemel, venetian screens, etc.

In the present invention, the packed bed of granular material is always used with an inclination, but the angle of inclination should be slightly changed depending on the angle of repose of the granular material.

Although it also varies depending on the "flow angle" involved in the movement of particulate matter, it is usually 20° to 80°, preferably 40° to 700°.
Good nearby. In addition, if the angle of repose of the angle of repose maintenance plates installed above the packed bed differs from the angle of repose of the granular material, it is better to insert more plates at smaller intervals as the degree of inclination increases to keep the packed layer at a constant thickness. It is preferable in the sense of tightening. In addition, this angle of repose holding plate is particularly effective because it serves to prevent the angle of repose from being distorted due to vibrations of the device. The angle of repose retention plate referred to in the present invention is defined as "a plate placed on the top of a porous material that supports particulate matter, perpendicular to the horizontal plane, and at a position that allows the particulate matter to move between the porous material and the angle of repose retention plate." , which is supported by the can body, prevents particulate matter from falling and the angle of repose from collapsing, and when particulate matter is discharged from the discharge part attached to the bottom of the exhaust gas purification device, the porous material and the When the plates are configured to allow easy movement of particulate matter between the angle-of-repose holding plates.

In the apparatus of the present invention, the surface of the packed bed is tilted as described above by utilizing the angle of repose and facilitating movement, but the upper and lower surfaces of the packed bed are flat in the simplest case.

Even in this case, the number of packed beds does not need to be one; depending on the combination, the packed bed has a shape in which the roof type, granular material supply part, and discharge part are gathered in a straight line, that is, the upper part is the roof type, and the lower part is reversed. It can be combined into a roof shape, or it can be repeated and stacked in several tiers. Also, the upper and lower surfaces of the packed layer are not flat, but may be conical surfaces, polygonal pyramidal surfaces, or a combination thereof. Conical There is a combination of ``Abacus beads''. However, in the case of rough matching, it is necessary to always introduce the exhaust gas from the upper surface of the packed bed forming the angle of repose, so it is necessary to provide upper and lower partition plates and provide inlets for each. Since the present invention has the above-described structure, it is possible to continuously purify the bed of particulate matter such as catalysts and adsorbents during exhaust gas treatment without clogging with soot and dust, and it is an extremely superior exhaust gas purification device. It is.

Examples of the present invention will be described below based on the drawings, but the present invention is not limited to the examples.

In each figure, 1 is an inlet for exhaust gas, and 2 is a porous material for supporting the granular material packed layer, which is fixed at an angle steeper than the angle of repose of the granular material layer, on which the granular material layer 3 is formed. . An angle of repose holding plate 4 is provided to prevent the thickness of the granular material layer from changing between the upper and lower slopes due to the difference between the angle of the porous material and the angle of repose of the granular material. Exhaust gas led from the inlet 1 is guided to the granular material layer 3 between the angle of repose holding plates 4 and purified, then passes through the gap between the porous materials 2 and is discharged from the outlet 7. released inside.

3 to 6 show another embodiment in which the granular material layer is formed in two sets, upper and lower, and in this case, the exhaust gas inlet and the purified exhaust gas are separated by a partition plate 6. On the other hand, when particulate matter becomes contaminated with soot and dust due to exhaust gas treatment, it flows obliquely downward between the porous material 2 and the angle of repose holding plate 4, and is intermittently or constantly extracted from the particulate matter extraction port 9. This is separated into soot and particulate matter. The soot and dust are discharged to the outside from the soot and dust discharge row 2, and the particulate matter is led back to the packed bed 3 through the particulate matter inlet 8 by the conveyor li and is used for purification. The porous material 2 and the angle of repose holding plate 4 are supported by the can body 51, and at the same time, the can body 5 isolates the exhaust gas from the atmosphere.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a vertical cross-sectional view of a plane with one filling layer, and FIG. 2 is a diagram of the hook of FIG.
Figure 3 is a vertical cross-sectional view of a combination of a roof type and an inverted roof type in which the packed bed has four planes, Figure 4 is a hook diagram of Figure 3, and Figure 5 is a combination of a packed bed with a conical surface. A vertical cross-sectional view of the so-called abacus bead shape, FIG. 6 is a hook diagram of FIG. 5. 1... Exhaust gas inlet, 2... Porous material, 3... Particulate matter packed layer, 4... Angle of repose holding plate, 5... Can body, 6... Partition plate, 7...
...Exhaust gas outlet, 8...Particle inlet, 9...
... Particulate matter extraction port, 10 ... Sieving machine, 11 ... Conveyor, 12 ... Dust discharge port. O figure gas'a O figure O breasts 2 Big S nail O 5' illusion

Claims (1)

[Claims] 1. In a device that purifies exhaust gas containing soot and dust by bringing it into contact with particulate matter such as a catalyst or adsorbent, the particulate matter is easily discharged by attaching a supply section to the top of the device filled with particulate matter and a discharge section to the bottom. The layer filled with particulate matter is tilted, the upper surface of the packed bed is basically a surface formed by the angle of repose of the particulate material, and angle of repose retaining plates are provided at appropriate intervals. The lower surface of the packed bed is supported by a porous material that allows exhaust gas to pass through but does not allow particulate matter to fall, and the structure is such that the flow of exhaust gas to be treated is introduced from the upper surface of the packed bed and discharged from the lower surface for treatment. An exhaust gas purification device comprising: