JPH06292811A - Device for filtering high temperature, high pressure gas containing dust - Google Patents

Abstract

PURPOSE: To provide a device for filtrating high temperature and high pressure gases incorporating dust which is constituted to locally determine the existence of damage in filter cores and to prevent a gaseous starting material from being mixed into a clean gas. CONSTITUTION: A large number of hollow filter elements are divided into groups and are arranged within a filter body 1 of the device for filtrating the high temperature and high pressure gases incorporating dust. The filter core 7 of each group is extended to the outside of the filter body 1 via a supply pipe line 9 and a clean gas pipe line 11. The clean gas collecting pipe lines 9 are extended from the filter body 1 to the external part respectively. Measuring devices for measuring the state of the clean gas are arranged at areas where the supply pipe lines 9 and/or the clean gas pipe lines 11 are positioned on the outside of the filter body 1 among the respective supply pipe lines 9 and/or the clean gas pipe lines 11, therewith controlling a shut off arrangement 13 provided in each supply pipe line 9 via the measuring device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a device for filtering dust-containing high temperature and high pressure gas using a number of hollow filter elements constructed according to the preamble of claim 1.

[0002]

2. Description of the Related Art A perforated plate which separates a filter body into a raw material gas space and a clean gas space.
A hot gas filter in which a filter core is hung from a filter is already known from DE-PS 3515365. In such a hot gas filter, if one of the filter cores fails due to breakage, unpurified source gas mixes with the clean gas. In order to prevent the dust content of the clean gas and the content of harmful substances from increasing beyond an unacceptable level, the use of the high temperature gas filter as a whole was stopped and a malfunction occurred. The filter core must be replaced. As a result, unnecessary reduction in production efficiency will occur.

It is also a DE-OS that the filter core is divided into groups or lines in the filter body so as to correspond to the collecting passages for introducing the clean gas.
It is already known from 3938264 and EP-OS 433637. The collection passages, in which the ceramic filter core is stationary or in which another filter core is provided below the ceramic filter core, are distributed over the cross section of the filter body. In addition, they are arranged side by side vertically in one or more planes. The collection passage is connected to the clean gas line inside the filter body or outside the filter body. In the case of this high temperature filter, no means is provided for coping with a failure caused by breakage of the filter core.

Filters of known hot gas filters
In order to clean the ceramic filter core placed inside the main body, high-pressure gas is intermittently blown into the clean gas pipe in the direction opposite to the flow direction of the clean gas. (EP-OS43363
See No. 7). In this connection, it is also known to measure the pressures of the source gas and the clean gas and set the pressure difference that occurs across the filter core based on the measurement results. (US-PS45009
See No. 26). If the value obtained from this measurement exceeds a predetermined value, a pulse is issued which indicates to clean the filter element of the relevant group. During the cleaning process, the supply of the raw material gas to the filter core of the corresponding group is stopped. In another known method (see WO88 / 7404):
Clean the pressure difference that causes the cleaning work.
The measurement result of the flow rate of the clean gas flowing in the gas pipeline is added. In this method, both the pressure and flow rate of the cleaning gas are discharged from the filter body.
It is not possible to infer the state of the filter elements of the individual groups as they are measured on the tuning gas.

An object of the present invention is to enable the presence or absence of damage to the filter core to be locally specified and prevent the source gas from being mixed with the clean gas. It is an object of the present invention to provide a device for filtering a high temperature and high pressure gas containing dust of the type initially mentioned.

[0006]

In order to solve the above problems, there is provided a device for filtering a high temperature and high pressure gas containing dust of the type initially mentioned, which is constructed according to the features of claim 1. It was provided in accordance with the present invention. Please refer to claims 2 to 6 for advantageous embodiments of the invention.

[0007]

The present invention is based on the basic idea that the damage of the filter core becomes remarkable when the condition of the cleaning operation changes significantly. As is well known, since the filter core is divided into groups and arranged individually corresponding to the channeling passage, the filter core is damaged due to the change of the cleaning state. It is possible to locally identify the filter core of the group in which the error occurs. Further, since the use of the filter core of the corresponding group is stopped based on the change of the cleaning condition, the operation is suspended until the inspection for determining the final use limit. The entire hot gas filter can be operated without commutation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings which illustrate preferred embodiments of the present invention. A device for filtering high-temperature and high-pressure gas containing dust includes a filter body 1 having a cylindrical jacket 2 and a curved cover.
3 and a hopper-4 arranged in the lower part. The hopper-4 is extended downward to the outlet joint 5 and serves to collect the separated dust. The filter body 1 also comprises a supply joint 6 for supplying the source gas to be purified.

A large number of hollow filter elements are arranged inside the filter body 1 and the hollow filter elements are
The filter element is connected with a collection passage 8 for conducting a clean gas so that the inner space of the element is in communication with the inner space of the collection passage 8. A filter tube is used as the filter element, or a ceramic filter core 7 constructed as a hollow body with one end closed, is used as the filter element. Each collection passage 8 carries a group of filter cores 7, and is the filter core 7 erected on the collection passages 8 via a properly designed mouth piece? Alternatively, it is suspended from the collection passage 8. The collection passage 8 may be mounted, for example, on an indicator ring attached to the jacket 2 of the filter body 1, or within the filter body 1 the filter core 7
You may make it hang from.

Each of the collecting passages 8 is connected to a supply pipe line 9, which extends to the outside through the filter body 1 and is connected to the pipe header 10 outside. There is. The header 10 is connected to a clean gas line 11 for discharging the clean gas to a clean gas collecting line 21. A shutoff mechanism 13 including a drive device 12 is provided outside each supply pipe 9.

Purification lances 14 are arranged coaxially with respect to each supply line 9. The purification lance 14 is inserted into the header 10 and ends at a position vertically spaced from the opening of the supply line 9. The gaseous purification medium is introduced into the collection passage 8 through the purification lance 14 at a predetermined pressure higher than the pressure of the raw material gas. By supplying the cleaning medium to the inner space of the filter core 7, the filter cake formed on the outside of the filter core 7 is removed.

As shown in FIG. 2 as a partial view,
For example, a measuring device 15 such as a measuring orifice for measuring the flow rate of the clean gas flowing through the supply lines 9 is provided in each supply line 9. The measuring pipe 16 is the measuring device 15.
A measuring device 17 for measuring the pressure difference, which is connected to the supply line 9 on both sides of, is arranged in the middle of the measuring line 16. The measuring devices 15 and 17 are driving devices 1 of the shut-off mechanism 13 provided in the corresponding supply line 9 via the control line 17.
It is connected to 2. When the measuring device 15 indicates that an unacceptable change in the supply state of the supply line 9 has occurred, this display indicates that one of the filter cores 7 of the group corresponding to the supply line 9 is to be displayed. This indicates that one or more of the filter cores 7 has a defective condition. In such a case, control is performed so that the drive device 12 receives a signal for closing the cutoff mechanism 12 of the corresponding supply pipeline 9 through the control pipeline 18. Even when the above signal is output, the blocking mechanism 13 can be manually closed. Measuring devices 15 and 17 may be provided in the clean gas line 11.

Another factor indicating the state of the gas on the clean gas side connected to the filter core 7 in a defective state is the dust content. As illustrated for the supply line 9 shown on the right side of FIG. 1, dust is present in the supply line 9 or in the clean gas line 11 which is located outside the filter body 1. A measuring device 19 is provided, and the dust measuring device 19 is
It is connected via a control line 18 to a drive device 12 provided in the same supply line 9. When the dust measuring device 19 records a dust content exceeding a predetermined dust concentration,
This condition can be attributed to the failure of one or more filter cores 7. In this case, the drive device 12 receives a signal for closing the shutoff mechanism 13 via the control line 18.

Another device, which serves to locally identify the defective part of the filter core 7 of one group, utilizes the static pressure on the clean gas side. Operate. At a suitable point in the system for directing the clean gas, for example, in the supply line 9 or the header 10, the clean
A pressure extraction unit 20 for measuring the static pressure of gas is provided. It is preferable that the pressure take-out portion 20 is provided in the middle of the purification lance 14. If the static pressure of the clean gas fluctuates, the filter core 7 will be in a defective state. Therefore,
The fluctuation of the static pressure of the clean gas is due to the cleaning lance 1.
1 of the filter cores 7 of the group corresponding to 4
This indicates that one or a plurality of filter cores 7 are in a defective state. As described above in connection with the control line 18, when the static pressure of the clean gas fluctuates, the drive device 12 for the shutoff mechanism 13 provided in the supply line 9 via the control line 18 is used. Signal is output to. That is, when the static pressure of the clean gas deviates from a predetermined value, the shutoff mechanism 13 is closed automatically or manually.

As described above, the measuring devices such as the devices 15 and 17 for measuring the flow rate of the clean gas, the dust content measuring device 19 and the pressure take-out portion 20 correspond to the filter core of each group. Is provided. In order to ensure that the filter device operates safely and reliably, multiple measuring devices operating on different principles are connected to the same supply line 9.
And / or provided corresponding to the clean gas pipe line 11,
You may make it connect with the drive device 12 of the interruption | blocking mechanism 13 via a selection circuit.

[Brief description of drawings]

FIG. 1 is a conceptual cross-sectional view of a device for filtering high-temperature and high-pressure gas containing dust, which is cut in the lengthwise direction while using various measuring devices configured according to an embodiment of the present invention.

2 is a conceptual explanatory view illustrating another measuring device used in the filtering device shown in FIG. 1. FIG.

[Explanation of symbols]

 1 Filter-Main Body 2 Cylindrical Jacket 3 Cover 4 Hopper 5 Outlet Joint 6 Supply Joint 7 Filter-Core 8 Collection Passage 9 Supply Pipeline 10 Pipe Heading 11 Clean Gas Pipeline 12 Drive Device 13 Shutoff Mechanism 14 Purification lance 15 Measuring device 16 Measuring pipe 17 Measuring device 18 Control pipe 19 Dust measuring device 20 Pressure extracting part 21 Clean gas collecting pipe

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] January 14, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

Title: Apparatus for filtering high temperature and high pressure gas containing dust

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor High Koreweinkel, Federal Republic of Germany, 4250 Bottrop, Schulstraße 28 (72) Inventor Friedrich Krauke, Federal Republic of Germany, 4030 Ratingen 1, Chromfolder Are 44 De (72) Inventor Date König Germany, 4324 Hatchingen, Nordstraße 43 (72) Inventor Ud Karthof, Federal Republic of Germany, 4330 Michelheim Lürburg-Kendorfer Strasse 50

Claims (6)

[Claims] 1. A number of hollow filter elements are arranged in the filter body (1), the filter elements of each group being provided with a supply line (9) and a clean gas line. It is connected via a (11) to a clean gas collecting line (21) arranged outside the filter body (1), and a supply line (9) is respectively provided in the filter body (1). An apparatus for filtering dust-containing high temperature and high pressure gas using the large number of hollow filter elements configured to extend from each feed line outside the filter body (1). A shutoff mechanism (13) is provided in (9), and each supply pipeline (9) and / or a cleaner is provided.
A device for measuring the state of the clean gas is provided in the clean gas line (11). 2. A cleaning device provided in the supply line (9) and / or in the cleaning gas line (11).
A gas flow measuring device (15) and a measuring line (16) extending to a pressure difference measuring device (17) on both sides of said device (15). And / or connected to a clean gas line (11). 3. A cleaning device provided in the supply line (9) and / or in the cleaning gas line (11).
Dust measuring device for measuring dust content of gas (19)
The device of claim 1 comprising: 4. A pressure outlet (20) for measuring the static pressure of the cleaning gas behind the filter element in the flow direction.
The device of claim 1, wherein the device is provided. 5. The shut-off mechanism (13) is controlled via a measuring device for measuring the state of the clean gas, according to any one of claims 1 to 4. apparatus. 6. A plurality of measuring devices operating on the basis of different measuring principles comprises a supply line (9) and / or a cleaner.
Device according to any one of claims 1 to 5, characterized in that it is provided in the gas line (11) and is connected to the shut-off mechanism (13) via a selection circuit.