JP3768765B2 - Exhaust gas treatment equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an exhaust gas treatment apparatus used for collecting particles contained in exhaust gas emitted from a factory or the like as a measure against air pollution.
[0002]
[Prior art]
Conventionally, there is an exhaust gas treatment apparatus as shown in FIG. This apparatus 100 has a bag filter 102 having a filter cloth 101 for treating exhaust gas inside, and the exhaust pipe 103 feeds the exhaust gas into the bag filter 102, and the filter cloth 101 collects dust and soot in the exhaust gas. Then, clean gas is sent toward the chimney or the like by the outlet pipe 104. Further, the material of the filter cloth 101 is selected based on the exhaust gas temperature during normal operation, but in an emergency, the temperature of the gas discharged from the factory increases rapidly. Therefore, a bypass pipe 105 through which the exhaust gas bypasses the bag filter 102 is provided. During normal operation, the valve 106 provided in the bypass pipe 105 is closed. In an emergency, the valves 107 and 108 are closed, the valve 106 is opened, and high-temperature exhaust gas flows through the bypass pipe 105. . As a result, the filter cloth 101 is not damaged or melted by high-temperature exhaust gas.
[0003]
[Problems to be solved by the invention]
However, the above-described conventional exhaust gas treatment apparatus has the following problems. In other words, the gas discharged from the bypass pipe 105 in an emergency is sent out in an exhaust gas state, that is, in an untreated state, and since it is an emergency, no measures have been taken in the past. .
[0004]
The present invention has been made to solve the above-described problems, and in an emergency, reduces particles in the gas discharged from the bypass pipe and collects dust, soot and the like directly connected to air pollution. An object of the present invention is to provide an exhaust gas treatment apparatus.
[0005]
[Means for Solving the Problems]
The exhaust gas treatment apparatus of the present invention according to claim 1 is an exhaust gas treatment apparatus for collecting particles contained in exhaust gas, and a bag filter having a filter cloth for treating exhaust gas inside, and introduction of the bag filter at the inlet side A bypass pipe connected to the outlet pipe of the bag filter and the outlet side of the bag filter, and the branch pipe branched from the bypass pipe is provided with a pot-shaped dust collector .
[0006]
In this exhaust gas treatment device, when the temperature of gas discharged from a factory or the like suddenly rises, high temperature exhaust gas bypasses the bag filter by a bypass pipe so that the filter cloth in the bag filter is not damaged. . In this case, assuming a case where high temperature exhaust gas is generated in an emergency, it is one idea to use a heat-resistant material as a filter cloth and not to use a bypass pipe. Maintenance costs are forced. Therefore, in order to reduce emissions to the atmosphere such as dust and soot that were not noticed in the past because it is an emergency, a pot-shaped dust collector is provided in the branch branched from the bypass pipe, It was devised to take measures against air pollution even in an emergency. In this way, by using an existing bypass pipe, it is possible to suppress air pollution even in an emergency with an inexpensive capital investment. Such emergency measures are considered to be extremely important at present when air pollution is a serious problem.
[0007]
Thus, the provision of the cup-shaped dust collector to branch pipe branched from the bypass pipe, it means that providing a cup-shaped dust collector in the branch pipe rather than mains bypass tube, a bypass tube Part of the exhaust gas that passes through will pass through the pot-shaped dust collector. Therefore, by changing the diameter, length, path, etc. of the branch pipe, exhaust gas that is discharged in large quantities in an emergency without applying an excessive load to the pot-shaped dust collector made of a heat-resistant mechanical structure, An amount corresponding to the dust collection capability of the dust collector can be poured into the dust collector, and the capability of the dust collector can be maximized.
[0008]
The exhaust gas treatment apparatus according to claim 2 includes a bag filter having a filter cloth for treating exhaust gas inside, a bypass pipe connecting an inlet pipe on the bag filter inlet side and a lead pipe on the outlet side of the bag filter; And a cyclone is provided in the main pipe of the bypass pipe.
Thus, the provision of the cyclone main bypass pipe, possible to efficiently process Rukoto in such Runode, a large amount of exhaust gas provided higher has heat resistance dust collecting capability cyclone main bypass pipe Can do.
[0009]
An exhaust gas treatment apparatus according to claim 3 includes a bag filter having a filter cloth for treating exhaust gas therein, and a bypass pipe connecting an inlet pipe on the inlet side of the bag filter and an outlet pipe on the outlet side of the bag filter; The valve plate of the valve mechanism provided on the inlet side of the bypass pipe is arranged to be inclined with respect to the inflow direction of the exhaust gas in the bypass pipe.
Thus, the valve plate provided with a valve mechanism to the inlet side of the bypass pipe and is arranged inclined relative to the inflow direction of the exhaust gas in the bypass pipe, in the closed state of the valve mechanism during normal operation, the bypass tube The dust or the like in the exhaust gas flowing into the valve collides with the valve plate of the valve mechanism and is shaken off by the valve plate. The dust generated at this time is accumulated in the bypass pipe near the valve plate. Furthermore, by arranging the valve plate to be inclined with respect to the inflow direction of the exhaust gas in the bypass pipe, dust can be accumulated in the bottom portion formed by the valve plate and the bypass pipe. Then, by providing a dust discharge pipe or the like at the bottom where dust accumulates, dust can be discharged to the outside in a timely manner.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of an exhaust gas treatment apparatus according to the present invention will be described in detail with reference to the drawings.
[0011]
FIG. 1 is a schematic view showing an exhaust gas treatment apparatus according to the present invention. The exhaust gas treatment apparatus 1 shown in the figure has a bag filter 3 having a filter cloth 2 for treating exhaust gas inside. The filter cloth 2 is selected based on the exhaust gas temperature during normal operation. For example, when the exhaust gas temperature during normal operation is about 200 ° C., a polyester fabric or a woven fabric made of inorganic fibers is generally used. A dust opening 4a is provided at the bottom of the housing 4 of the bag filter 3. The dust shaken off by the filter cloth 2 is discharged to the outside through the dust opening 4a, and this dust is not shown in a belt conveyor. Or the like and is transported to a predetermined place.
[0012]
Therefore, the exhaust gas discharged from the factory is sent into the bag filter 3 by the introduction pipe 6 connected to the inlet side of the bag filter 3, and dust and soot are collected by the filter cloth 2 in the bag filter 3. Thereafter, clean gas is sent out toward the chimney or the like by the outlet pipe 7 connected to the outlet side of the bag filter 3. The introduction pipe 6 and the lead-out pipe 7 are provided with valve parts 8 and 9 such as a slide valve and a butterfly valve, and these valve parts 8 and 9 are opened during normal operation and closed in an emergency.
[0013]
Furthermore, when the temperature of the gas discharged from a factory or the like rapidly increases, that is, in an emergency, it is necessary to prevent the filter cloth 2 in the bag filter 3 from being damaged by the heat of the exhaust gas. Therefore, the apparatus 1 is provided with a bypass pipe 10 that connects the introduction pipe 6 and the outlet pipe 7, and a valve mechanism 11 is attached to the inlet side of the bypass pipe 10.
[0014]
As shown in FIG. 2, the valve mechanism 11 is closed during normal operation and opened during emergency operation, and has valve plates 12 and 13 arranged in two rows in the extending direction of the bypass pipe 10. ing. The valve plates 12 and 13 open and close the bypass pipe 10 by sliding in a direction perpendicular to the pipe axis. As described above, when the double-structure valve mechanism 11 is employed, the closing performance of the bypass pipe 10 is enhanced during normal operation.
[0015]
Further, the valve plates 12 and 13 are arranged to be inclined with respect to the inflow direction (arrow A) of the exhaust gas in the bypass pipe 10. When such a configuration is adopted, in a state where the valve mechanism 11 is closed during normal operation, dust or the like in the exhaust gas flowing into the bypass pipe 10 is caused to collide with the valve plate 12 of the valve mechanism 11. The dust C is shaken off by the valve plate 12, and the dust C is accumulated in the bypass pipe 10 in the vicinity of the valve plate 12.
[0016]
At this time, since the valve plate 12 is inclined, the dust C can be accumulated in the bottom portion 20 formed by the valve plate 12 and the bypass pipe 10. By providing the bypass pipe 10 with a dust discharge pipe 13 that communicates with the bottom portion 20 where the dust C accumulates, the dust C can be discharged to the outside through the dust discharge pipe 14 in a timely manner.
[0017]
The dust C is discharged to the outside by opening the valve portion 15 of the dust discharge pipe 14. However, when the bypass pipe 10 extends downward from the introduction pipe 6 or extends horizontally, the dust C is It accumulates in the bypass pipe 10. However, when the bypass pipe 10 extends upward from the introduction pipe 6, the dust C does not accumulate in the bypass pipe 10.
[0018]
In an emergency, the valve portions 8 and 9 are closed and the valve mechanism 11 is opened. At this time, high-temperature exhaust gas flows through the bypass pipe 10, but a dust collector 16 is provided in the middle of the bypass pipe 10 in order to reduce discharge of dust and soot to the atmosphere as much as possible.
[0019]
As shown in FIG. 1, the dust collector 16 is a pot-shaped dust collector 17 and a cyclone 18. This pot-shaped dust collector (so-called dust pot) 17 is a louver-type dust collector that has a simple structure and can handle high-temperature gas. Generally, particles are produced by colliding exhaust gas with obstacles. There is a collision type that collects particles and an inversion type that collects particles by changing the direction of exhaust gas. In addition, since the dust collector 17 is provided not in the main pipe 10 a of the bypass pipe 10 but in the branch pipe 10 b, not all of the exhaust gas passing through the bypass pipe 10 but a part thereof is passed through the dust collector 17. Become.
[0020]
Therefore, by changing the diameter, length, route, etc. of the branch pipe 10b, exhaust gas flowing in large quantities in an emergency can be obtained without imposing an excessive load on the pot-shaped dust collector 17 having a mechanical structure resistant to heat. The amount corresponding to the dust collecting ability can be poured into the dust collector 17, and the ability of the dust pot 17 can be maximized.
[0021]
Further, on the downstream side of the dust collector 17, the main pipe 10 a of the bypass pipe 10 is provided with a cyclone 18 that has heat resistance and excellent dust collection ability. Therefore, even if a large amount of exhaust gas is generated in an emergency, the exhaust gas can be processed with high efficiency, and a large amount of dust, soot and the like directly connected to air pollution can be collected. A multi-cyclone is appropriate when a large amount of exhaust gas is assumed.
[0022]
The exhaust gas treatment apparatus of the present invention is not limited to the above-described embodiment. For example, as shown in FIG. 3, by extending the inlet side of the bypass pipe 10 downward with respect to the introduction pipe 6, FIG. As shown in FIG. 2, the dust C can be reliably accumulated in the bypass pipe 10. On the other hand, as shown in FIG. 4, when the bypass pipe 10 extends upward from the introduction pipe 6, the dust C does not accumulate in the bypass pipe 10. Thereby, the influence of the dust on the valve mechanism 11 can be reduced, and at the same time, the dust in the exhaust gas hardly leaks from the gap of the valve mechanism 11. Further, the valve plates 12 and 13 are not limited to the slide type and may be a rotary type.
[0023]
【The invention's effect】
Exhaust gas treatment device according to the invention, the exhaust gas treatment device for catching particles contained in exhaust gas, and a bag filter having a filter cloth for treating an exhaust gas therein, an inlet side of the inlet tube and the bag filter bag filter A bypass pipe connected to the outlet pipe on the outlet side of the gas outlet, and by providing a pot-shaped dust collector in the branch pipe branched from the bypass pipe, the gas discharged from the bypass pipe in an emergency It is possible to reduce dust particles and collect dust and soot that are directly linked to air pollution.
An exhaust gas treatment apparatus according to the present invention includes a bag filter having a filter cloth for treating exhaust gas, an inlet pipe on the inlet side of the bag filter, and a bag filter in an exhaust gas treatment apparatus that collects particles contained in the exhaust gas. A bypass pipe connected to the outlet pipe on the outlet side, and by providing a cyclone on the main pipe of the bypass pipe, in an emergency, particles in the gas discharged from the bypass pipe are reduced and air pollution is reduced. Directly connected dust and soot can be collected.
An exhaust gas treatment apparatus according to the present invention includes a bag filter having a filter cloth for treating exhaust gas, an inlet pipe on the inlet side of the bag filter, and a bag filter in an exhaust gas treatment apparatus that collects particles contained in the exhaust gas. A bypass pipe connected to the outlet pipe on the outlet side, and the valve plate of the valve mechanism provided on the inlet side of the bypass pipe is inclined with respect to the inflow direction of the exhaust gas in the bypass pipe, In an emergency, it is possible to reduce particles in the gas discharged from the bypass pipe and collect dust, soot and the like that are directly connected to air pollution.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a first embodiment of an exhaust gas treatment apparatus according to the present invention.
FIG. 2 is a cross-sectional view showing a valve mechanism applied to the exhaust gas treatment apparatus of the present invention.
FIG. 3 is a schematic view showing a second embodiment of the exhaust gas treatment apparatus according to the present invention.
FIG. 4 is a schematic view showing a third embodiment of the exhaust gas treatment apparatus according to the present invention.
FIG. 5 is a schematic view showing a conventional exhaust gas treatment apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Exhaust gas processing apparatus, 2 ... Filter cloth, 3 ... Bag filter, 6 ... Introducing pipe, 7 ... Outlet pipe, 10 ... Bypass pipe, 10a ... Main pipe, 10b ... Branch pipe, 11 ... Valve mechanism, 12, 13 ... Valve Plate, 16 ... Dust collector, 17 ... Pot-shaped dust collector, 18 ... Cyclone.

Claims (3)

In the exhaust gas treatment device for collecting particles contained in the exhaust gas,
A bag filter having a filter cloth for treating the exhaust gas inside;
A bypass pipe connecting an inlet pipe on the inlet side of the bag filter and an outlet pipe on the outlet side of the bag filter;
An exhaust gas treatment apparatus characterized in that a pot-shaped dust collector is provided in a branch pipe branched from the bypass pipe . In the exhaust gas treatment device for collecting particles contained in the exhaust gas,
A bag filter having a filter cloth for treating the exhaust gas inside;
A bypass pipe connecting an inlet pipe on the inlet side of the bag filter and an outlet pipe on the outlet side of the bag filter;
Exhaust gas treatment device characterized in that a cyclone main of the bypass pipe. In the exhaust gas treatment device for collecting particles contained in the exhaust gas,
A bag filter having a filter cloth for treating the exhaust gas inside;
A bypass pipe connecting an inlet pipe on the inlet side of the bag filter and an outlet pipe on the outlet side of the bag filter;
Wherein the valve plate of the valve mechanism provided on the inlet side of the bypass pipe, you characterized in that is arranged inclined relative to the inflow direction of the exhaust gas in the bypass pipe exhaust gas treatment apparatus.

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