JPH046816Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus suitable for precision dust collection treatment of high-temperature dust-containing gas.

[Conventional technology]

Previously, JP 60-9843, JP 59-
As shown in Japanese Patent No. 225721, a dust collector using a filter made of a porous ceramic sintered body or a porous sintered metal in the shape of a cylinder with a bottom or a cylinder with both ends open has been proposed. In these dust collectors, a heat insulating material is attached to the inside of the clean gas discharge chamber, but no measures are taken to prevent dust generated from the heat insulating material from entering the clean gas.

[Problem that the invention attempts to solve]

For this reason, the above-mentioned conventional dust collector has a problem in that it cannot handle the high degree of cleaning required when a device such as a gas turbine is connected downstream. Although it is possible to prevent clean gas from being contaminated without using insulation, it is necessary to make the outlet shell itself heat resistant and have practical mechanical strength at high temperatures, and which is not intrusive to the internal fluid. There is a problem that it is necessary to use a material that cannot be used in the manufacturing process, making it expensive.

The present invention was developed in view of the above points, and is a dry type dust collector that has a structure in which high temperature dust-containing gas and collected clean gas are separated by a partition wall. The surface of the insulation material inside the shell on the gas outlet side is covered with an inner shell made of a material that is heat resistant and is not corroded by the internal gas, thereby preventing dust generated from the insulation material from getting mixed into the clean gas. The purpose is to provide a precision gas dust collector.

[Means and actions for solving problems]

The high-temperature gas precision dust collector of the present invention will be described with reference to the drawings. The device body 1 is lined with a heat insulating material 2 and includes a large number of porous ceramic sintered bodies or porous sintered metals. In a dry type dust collector in which a dust collection filter 3 with both ends open or one side bottomed is provided and high-temperature dust-containing gas is passed through the dust collection filter 3 to produce clean gas, the heat insulating material inside the equipment main body on the clean gas outlet side The two surfaces are coated with an internal shell 13 made of a material that is heat resistant and not eroded by internal gas. Examples of materials that are heat resistant and not corroded by internal gases include Incoloy 800, Inconel 600, Hastelloy X, and the aforementioned metals coated with ceramic.

In addition, as a dust collection filter, so-called granite filters are used, which are made by filling granular filter materials such as porous ceramic sintered bodies, porous sintered metals, sand, gravel, and ceramics between supports such as louvers, wire mesh, and punched metal. Yura filter etc. are used.

〔Example〕

Hereinafter, an embodiment of the present invention in which a cylindrical ceramic filter with both ends open is used as a dust collection filter will be described with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a device main body consisting of an upper shell 1a and a lower shell 1b, and the inside is lined with a heat insulating material 2. Inside the apparatus body 1, a large number of cylindrical ceramic filters 3 with both ends open are provided vertically, and above and below these filters 3, upper and lower partition walls 4 and 5 are provided so that gas can pass through the filters. There is. 6 is a connection member for the ceramic filter, 7 is a high temperature dust-containing gas inlet, 8 is a clean gas outlet, 10 is a collected dust outlet, 11 is a backwashing gas supply pipe, 12
is a backwash nozzle.

In the dry dust collector configured as described above, the surface of the heat insulating material 2 inside the device main body on the clean gas outlet side is covered with a thin inner shell 13 made of a material that has heat resistance and is not eroded by internal gas. .

The high-temperature dust-containing gas introduced from the high-temperature dust-containing gas inlet 7 flows from the outside to the inside of the ceramic filter 3, and the dust in the gas is collected on the outer surface of the ceramic filter. The clean gas that has passed through the ceramic filter 3 enters the upper shell 1a and is exhausted from the clean gas outlet 8. At this time, upper shell 1
Since the inner surface of a is covered by the internal shell 13, dust generated from the heat insulating material 2 is not mixed into the clean gas.

On the other hand, the dust collected on the outer surface of the ceramic filter is blown off by injecting backwashing gas from the backwashing nozzle 12 installed on each ceramic filter at appropriate intervals, and the dust is removed from the collected dust outlet 10. be discharged.

[Effect of idea]

As mentioned above, in the dust collector of the present invention, the surface of the insulation material inside the shell on the outlet side of the clean gas is covered with a thin inner shell made of a material that is not corroded by the internal gas, so that the dust generated from the insulation material in the clean gas is covered. This has the effect that dust does not get mixed in and the clean gas is not contaminated.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view showing one embodiment of the high-temperature gas precision dust collector of the present invention, and FIG. 2 is an enlarged view of the portion surrounded by a chain line circle in FIG. 1. 1...Device main body, 1a...Upper shell, 1b...
...Lower shell, 2...Insulating material, 3...Ceramic filter, 4...Upper partition, 5...Lower partition, 6
... Connection member, 7 ... High temperature dust-containing gas inlet, 8 ...
...Clean gas outlet, 10...Collected dust outlet, 11
... Backwash gas supply pipe, 12 ... Backwash nozzle, 1
3...Inner shell.

Claims (1)

[Claims for Utility Model Registration] A large number of dust collection filters made of porous ceramic sintered bodies or porous sintered metals with both ends open or one end closed are provided in the device body lined with a heat insulating material, In a dry dust collector that passes dust-containing gas through this dust collection filter to produce clean gas, the surface of the insulating material inside the device body on the clean gas outlet side is made of a material that is heat resistant and not corroded by the internal gas. A precision dust collector for high-temperature gas that is coated with an internal shell.