GB2044123A - Declogging process for filtration installation - Google Patents
Declogging process for filtration installation Download PDFInfo
- Publication number
- GB2044123A GB2044123A GB8007143A GB8007143A GB2044123A GB 2044123 A GB2044123 A GB 2044123A GB 8007143 A GB8007143 A GB 8007143A GB 8007143 A GB8007143 A GB 8007143A GB 2044123 A GB2044123 A GB 2044123A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filtration
- declogging
- installation
- dust
- cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0091—Including arrangements for environmental or personal protection
- B01D46/0093—Including arrangements for environmental or personal protection against fire or explosion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/90—Devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration or maintenance
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Toxicology (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
In a filtration installation for dust-laden gases presenting reducing properties, dust-free gas is taken from the outlet of the filtration installation, said gas is oxidized and the inert gaseous mixture resulting from this oxidization is used for declogging the filtering element(s) of said installation. The dust-laden gases may emanate from a metal refining furnace.
Description
SPECIFICATION
Declogging process for filtration installation and improved filtration installation
The invention relates to filtration installations for dust-laden gases whose chemical composition confers on said dust-laden gases reducing properties.
The invention concerns the declogging processes for such installations as well as the installations using these processes.
Such dust-laden gases are frequently met with in the electro-metallurgical industry and, in compliance with the anti-pollution norms at present in force, these dust-laden gases must be filtered.
These dust-laden gases are then filtered in filtration installations which comprise one or more filtering elements having an upstream face meeting the dust-laden gases and a downstream face, the dust being deposited on the upstream face.
It is therefore necessary to periodically clean the filtering element(s) to remove the layer of dust deposited on the upstream face, this operation being called "declogging".
It is known to carry out this declogging operation by pneumatic means generally supplied with air.
Under these conditions, the mixture formed by the dust-laden gas (which presents reducing properties) and the air (which present oxidizing properties) may have explosive properties forming a considerable danger in view of the electrostatic phenomena which may occur at the time of declogging.
In fact, a declogging operation which consists in removing the layer of dust (cake) deposited on the upstream face of each filtering element, generates electrostatic charges able to give rise to electrostatic phenomena generating electric discharges.
It has been already proposed to carry out the declogging operation with neutral gas (e.g. nitrogen), but then we come up against problems of running costs.
The invention has precisely as its aim to avoid having recourse to an expensive neutral gas.
The invention provides a declogging process and a filtration installation whose operating costs are less than those of installations known up to present, and this while offering the same security against risks of explosion.
Furthermore, the invention also has as objective an installation in which it is possible to recover the heat energy which may be used, especially when it is a question of a filtration installation in an electrometallurgical complex for supplying the metal refining devices.
According to the invention, dust-free gas is taken from the outlet of the filtration installation, this gas is oxidized and the inert gaseous mixture resulting from this oxidization is used for declogging the filtering element(s) of said installation.
The filtration installation of the invention comprises pneumatic declogging means for cleaning the filtering element(s) and it is characterized by the fact that these declogging means are supplied with an inert gaseous mixture formed essentially by combustion gases from a combustion chamber receiving, on the one hand, reducing dust-free gas taken at the outlet of the installation and, on the other hand, oxidizing gas.
Preferably, a heat exchanger for transferring heat energy between this inert gaseous mixture and a fluid to be heated is provided between the combustion chamber and the pneumatic declogging means.
With the invention, the installation can then be declogged with an inert gaseous mixture resulting from the reaction between the reducing dust-free gas and an oxidizing gas, this inert gaseous mixture not being able to form an explosive mixture,
- either with the reducing dust-free gas which occupies the filtration installation downstream of the filtering element(s),
- or with the reducing dust-laden gas which occupies the filtration installation upstream of the filtering element(s).
Furthermore, this inert gaseous mixture is produced on the site of the installation and just in the required amount.
Finally, the production of this inert gaseous mixture resulting from the combustion of the reducing dust-free gas with an oxidizing gas which may be formed by air, produces heatenergywhich is partly recovered in the circuit through which the fluid to be heated passes.
According to a particularly advantageous application of the invention, the filtration installation is disposed so as to receive reducing dust-laden gases from a metal refining furnace, which is itself supplied from a roasting furnace itself receiving:
- the reducing dust-free gas from the filtration installation,
- a reheated oxidizing gas from the heat exchanger situated downstream of the combustion chamber,
- a mineral or metal oxide charge,
- and, possibly, a complement of oxidizing gas heated in a heat recuperator through which pass the dust-laden gases before being admitted into the filtration installation.
It will then be readily understood that the filtration installation of the invention may lead, in an electrometallurgical complex, to a substantial saving in energy.
A particular arrangement of the invention will now be examined, relative to filtration installations comprising several filtration cells each equipped with at least one filtering element through which passes the dust-laden gas.
When the filtration installation comprises, as mentioned above, several filtration cells, it is known to carry out the declogging cell by cell, i.e. that one cell is isolated and the filtering element(s) of this cell are declogged, the other cells remaining active.
According to this particular arrangement of the invention, after isolating the filtration cell and before declogging same with the inert gaseous mixture from the combustion chamber, it is scavenged by a counter-current of this same inert gaseous mixture, this scavenging being carried out in conditions such that the inert gaseous scavenging mixture completely renews the atmosphere of this cell, without causing the layer of dust deposited on the upstream face of the filtering element(s) of said cell to be detached.
Possibly, after proceeding with declogging of this filtration cell, it may be once more scavenged with a counter current of this same inert gaseous mixture, in conditions such that this inert gaseous mixture accompanies the fall of fragments of the dust layer towards discharge means provided in the lower zone of the filtration installation.
For implementing this particular arrangement of the invention, the filtration installation comprises in a way known per se:
- several filtration cells each equipped with at least one filtering element through which a dustladen gas passes,
- an inlet enclosure common to the filtration cells, situated on the upstream face side of the filtering elements, and connected to a dustladen gas supply,
- an outlet enclosure for each filtration cell situated on the downstream face side (opposite the upstream face) of the filtering elements,
- a collecting enclosure common to the filtration cells, communicating with each outlet enclosure through independently conrollable means for each cell, and connected to a dust-free gas discharge,
- and means for pneumatic declogging with the inert gaseous mixture from the combustion chamber for declogging the filtering element(s) of each filtration cell, these declogging means being independently controllable for each cell,
and it is characterized by the fact that it further comprises inlet means for scavenging with the inert gaseous mixture from the combustion chamber, this gaseous mixture being fed in a counter current into each outlet enclosure, these scavenging inlet means being independently controllable for each outlet enclosure and being supplied with inert gaseous mixture so that, when said inlet scavenging means are open, the counter-current flow of the inert gaseous mixture produces complete renewal of the atmosphere of the cell considered, without causing the dust layer deposited on the upstream face of the element(s) of this filtration cell to be detached.
It will then be readily understood that with the invention the inert gaseous mixture fills first of all the outlet enclosure of the filtration cell considered, passes through the filtering element(s) ofthis filtration cell and through the dust layer deposited on the upstream face of this or these filtering elements (without causing it to be detached), and finally spreads into the part of the filtration cell which surrounds the filtering element(s) considered.
Therefore, just the required amount of inert gaseous mixture may be used to avoid any risk of explosion in the filtration cell during declogging, thus avoiding having to fill the whole of the filtration cell with this gaseous mixture.
Preferably there is provided in the inlet enclosure partial separation walls separating, without isolating them one from the other, the filtering element(s) of the filtration cells.
This arrangement promotes the confinement of the inert gaseous mixture about the filtration element(s) of each filtration cell.
The above and other objects, features and advantages of the present invention will become apparent from the following description given solely by way of non limiting illustration when taken in conjunction with the accompanying drawings.
Figure 1 of these drawings is a schematical view of a first embodiment of a filtration installation constructed in accordance with the invention.
Figure2 is a schematical view illustrating another embodiment of the invention.
Figure 3 is a schematical view of another embodiment of a filtration installation in accordance with the invention.
Figure 4 is a detail view illustrating a variation of the embodiment of the invention shown in Figure 3.
In Figure 1 there is shown by way of example a filtration installation for a dust-laden gas coming from an installation not shown and whose chemical composition confers on this gas reducing properties.
This gas is conveyed to the filtration installation by duct 1. The filtration installation comprises one or more filtering elements 2 (only one of which is shown in Figure 1), this filtering element 2 having an upstream face 2a, meeting the dust-laden gas, and a downstream face 2b.
The dust is deposited on the upstream face 2a.
It has been assumed in Figures 1 and 2 that filtering element 2 was formed by a sleeve held in place by a separating wall 3.
Filtering element 2 is surrounded by an enclosure 4 separated into two parts by separating wall 3, namely:
- an upstream part 4a in which the dust-laden gases are introduced,
- a downstream part 4b in which the dust-free gas is collected.
This dust-free gas is removed from the filtration installation by appropriate means such as one or more fans 5.
To clean the filtering element(s) 2, a cleaning (declogging) operation is periodically undertaken to remove the layer of dust deposited on the upstream face 2a of filtering element 2.
This declogging operation is conducted with pneumatic means designated generally by the reference number 6.
These pneumatic declogging means are wellknown and the principle of their operation is based on directing a blast of gas (generally air) into the downstream part 4b of enclosure 4, this blast of gas causing distension or a series of distensions of filtering element 2 from its downstream face 2b towards its upstream face 2a.
According to the invention, declogging is carried out by taking dust-free gas at the outlet of the downstream part 4b of enclosure 4, this gas is oxidized in a combustion chamber 7 and the inert gaseous mixture resulting from this oxidation is used for declogging filtering element 2, declogging means 6 being then supplied with said gaseous mixture.
This combustion chamber 7 receives then, on the one hand, at 8, reducing dust-free gas taken from the upper part 4 and, on the other hand, at 9, oxidizing gas which may advantageously be formed by air.
A heat exchanger 10 allows heat energy transfer between the inert gaseous mixture formed by the combustion gases from combustion chamber 7 and a fluid to be heated flowing in a circuit 11.
In Figure 2, one embodiment of the invention is shown in a particular application met with in the electro-metallurgical industry. In this Figure 2 the same reference figures designate the same parts as in Figure 1.
The filtration installation is disposed so as to receive reducing dust-laden gases from a metal refining furnace 21 which itself is supplied from a roasting furnace 22.
The reducing dust-free gas from the filtration installation is directed:
- on the one hand, to declogging means 6, after being previously oxidized in combustion chamber 7 and cooled in exchanger 10,
- and, on the other hand, at 23, towards roasting furnace 22 which also receives at 24 a mineral or metal oxide charge.
This roasting furnace 22 receives at 25 an oxidizing gas (generally air) which is heated after passing through circuit 11 of exchanger 10.
To complete the oxidizing gas supply for roasting furnace 22, this latter receives at 26 a complement of oxidizing gas (air) which has been heated in a recuperator 27 through which the dust-laden gases pass before being admitted into the filtration installation.
A filter 28, completed by an ultrafilter 28a, is advantageously provided upstream of declogging means 6.
In Figures 3 and 4, in which the same reference figures denote the same parts as in Figure 1, there is shown a filtration installation comprising several filtration cells3ia,31b,31c...
Each filtration cell 31 a, 31 b, 31 c... is equipped with at least one filtering element 32 such as a sleeve or pocket filter for example (a single one of these filtering elements 32 being visible in Figure 3).
This filtering element 32 has passing therethrough a dust-laden gas in the direction shown by arrows F.
According to the process of the invention, after isolating the filtration cell to be declogged 31a and before declogging same with the gaseous mixture from combustion chamber 7, it is scavenged in the direction shown by arrow G, opposite the direction shown by arrow F, with a counter current of the inert gaseous mixture from combustion chamber 7, this counter-current scavenging being carried out in conditions such that the inert gaseous scavenging mixture completely renews the atmosphere of this cell 31a, without causing the layer of dust deposited on the upstream face 32a of the filtering element(s) 32 of said cell 31a to be detached.
According to a prefered mode of procedure, after carrying out declogging of filtration cell 31a, it is once more scavenged with a counter current of this same inert gaseous mixture in conditions such that the inert gaseous mixture accompanies the fall of fragments of the dust layer towards discharge means 33 provided in the lower zone of the filtration installation.
For implementing this process, the filtration installation comprises:
- filtration cells 31a, 31 b, 31 c each equipped with at least one filtering element 32 through which passes a current of dust-laden gas,
- an inlet enclosure 34 common to filtration cells 31 a, 31 b, 31 c situated on the upstream face 32a side of filtering elements 32, and connected to a dustladen gas supply 35,
- an outlet enclosure 36a, 36b, 36c for each filtration cell 31 a, 31 b, 31 c situated on the downstream face 32b side (opposite upstream face 32a) of filtering elements 32,
- a collecting enclosure, common to filtration cells 31a, 31b, 31 c communicating with each outlet enclosure 36a, 36b, 36c through closure means 38a, 38b, 38c independently controllable for each cell, and connected to a dust-free gas discharge 39,
- pneumatic declogging means 40 operating with the inert gaseous mixture from combustion chamber 7, for the filtering element(s) 32 of each filtration cell 31a, 31b, 31c,thesedeclogging means 40 being independently controllable for each cell 31 a, 31 b, 31c,
- and discharge means 33 provided in the lower zone of the inlet enclosure 34.
This filtration installation comprises furthermore inlet means 41 a, 41 b, 41c for scavenging with the inert gaseous mixture from combustion chamber 7, this inert gaseous mixture being fed counter-current wise into each outlet enclosure 36a, 36b, 36c, these scavenging inlet means 41 a, 41 b, 41 c being independently controllable for each outlet enclosure 36a, 36b, 36c and being supplied with inert gaseous mixture so that when said scavenging inlet means 41 a, 41 b, 41 are open, the counter current flow of inert gaseous mixture produces complete renewal of the atmosphere of the cell considered 31 a, without causing the layer of dust deposited on the upstream face 32 of the filtering element(s) of this filtration cell 31 a to be detached.
For forming the pneumatic declogging means 40, a pneumatic device 43 is provided fed with inert gaseous mixture (complementary high pressure source 44 - Figure 3 - or compressor 45 driven by a motor 450 - (Figure 4) and adapted to generate an inert gaseous mixture flow capable of causing the layer of dust deposited on the upstream face 32a of the filtering element 32 of cell 31 a considered to be loosened and detached, when this penumatic device 43 is put into communication with said filtration cell.
For this purpose, pneumatic device 43 is connected by declogging inlet means 46a, 46b, 46c to each outlet enclosure 36a, 36b, 36c, these inlet means 46a, 46b, 46c being controllable at will for each outlet enclosure 36a, 36b, 36c.
The operation of the installation is then the following.
1) Installation completely in filtration condition:
- closure means 38a, 38b, 38c are open,
- the inert gas scavenging inlet means 41a, 41 b, 41 c are closed as well as the declogging inlet means 46a, 46b, 46c.
2) Preparation for declogging filtration cell 31a:
- closure means 38a are actuated to control their closing.
3) Declogging filtration cell 31a:
- scavenging inlet means 41 a of the filtration enclosure 31 a are opened to cause the first scavenging,
- said scavenging inlet means 46a of the filtration enclosure 31 a are opened to connect said enclosure with the complementary source 44 or with compressor 45 (after starting up motor 450) to loosen the cake;
said declogging inlet means 46a are closed.
4) Discharge of the dust from filtration cell 31 a: - discharge means provided for this purpose in the lower zone of the installation or of the inlet enclosure. are brought into operation, these discharge means 43 being either common to all the filtration cells or each disposed below a filtration cell,
- the first scavenging of the filtration cell 31a is possibly pursued by again opening the scavenging inlet means 41 a of this filtration cell.
5) Putting the installation completely back into the filtration condition:
- scavenging inlet means 41a of filtration cell 31 a are closed,
- closure means 38a of filtration cell 31a are actuated to control the closing thereof.
To control closure means 38a, 38b, 38c..., scavenging inlet means 41 a, 41 b, 41 c, declogging inlet means 46a, 46b, 46c and, in the case of Figure 4, motor 450 of compressor 45, a programming device 47 may be provided.
It may be noticed that in the case of Figure 4, compressor 45 is permanently driven by motor 450; an accumulation reservoir 451 is then provided at the outlet of the compressor.
This arrangement enables the flow required for the declogging operation properly speaking to be injected in a very short time.
A non-return valve 42a may be provided at the outlet of the source of combustion chamber 7; this arrangement simplifies the operation of the installation by making the closure of scavenging inlet means 41 a, 41 b, 41 c pointless during the declogging phase.
It is apparent that within the scope of the invention modifications and different arrangements can be made other than are here disclosed. The present disclosure is merely illustrative with the invention comprehending all variations thereof.
Claims (12)
1. A declogging process for a filtration installation for dustladen gases presenting reducing properties, wherein dust-free gas is taken from the outlet of the filtration installation, said gas is oxidized and the inert gaseous mixture resulting from this oxidization is used for declogging the filtering element(s) of said installation.
2. The process as claimed in claim 1, wherein a transfer of heat energy between the combustion gases and a fluid to be heated is effected before supplying the declogging means of the installation.
3. The process as claimed in claim 1 or 2, applicable to a filtration installation comprising several filtration cells equipped with at least one filtering element consisting in isolating the filtration cell to be declogged and then proceeding with the declogging of the filtering element(s) of this cell, wherein, after isolating the filtration cell and before declogging same with the inert gaseous mixture from the combustion chamber, it is scavenged with a counter current of this inert gaseous mixture from the combustion chamber, this scavenging being effected in conditions such that the scavenging inert gaseous mixture completely renews the atmosphere of this cell without causing the layer of dust deposited on the upstream face of the filtering element(s) of said cell to be detached.
4. The process as claimed in claim 3, wherein, after declogging the filtration cell, it is once more scavenged with a counter current of this same inert gaseous mixture in conditions such that this inert gaseous mixture accompanies the fall of fragments of the dust layer towards discharge means provided in the lower zone of the filtration installation.
5. A filtration installation for dust-laden gases having reducing properties comprising pneumatic declogging means for cleaning the filtering element(s), wherein these declogging means are fed with an inert gaseous mixture essentially formed by combustion gases from a combustion chamber receiving, on the one hand, reducing dust-free gas taken from the outlet of the installation and, on the other hand, oxidizing gas.
6. The installation as claimed in claim 5, wherein a heat exchanger for transferring heat energy between the combustion gases and a fluid to be heated is provided between the combustion chamber and the pneumatic declogging means.
7. The installation as claimed in claim 5 or 6 for receiving reducing dust-laden gases from a metal refining furnace which is itself supplied from a roasting furnace, wherein said roasting furnace itself receives:
-the reducing dust-free gas from the filtration installation,
- a heated oxidizing gas from the heat exchanger situated downstream of the combustion chamber;
- a mineral or metal oxide charge.
8. The installation as claimed in claim 7, wherein the roasting furnace receives further a complement of oxidizing gas heated in a heat recuperatorthrough which the dust-laden gases pass before being admitted into the filtration installation.
9. The installation as claimed in any one of claims 5 to 8, wherein at least one filter is provided downstream of the declogging means.
10. The installation as claimed in any one of claims 5 to 9, comprising in a way known per se:
- several filtration cells equipped with at least one filtering element through which the dust-laden gas passes,
- an inlet enclosure common to the filtration cells situated on the upstream face side of the filtering elements and connected to a dust-laden gas supply,
- an outlet enclosure for each filtration cell, situated on the downstream face side of the filtering elements,
- a collecting enclosure common to the filtration cells, communicating with each outlet enclosure through independently controllable closure means for each cell, and connected to a dust-free gas discharge,
- and pneumatic means for declogging with the inert gaseous mixture from the combustion chamber for declogging the filtering element(s) of each filtration cell, these declogging means being independently controllable for each cell,
wherein there is further provided inlet means for scavenging with the inert gaseous mixture from the combustion chamber, this inert gaseous mixture being fed in a counter current into each outlet enclosure, these scavenging inlet means being independently controllable for each outlet enclosure and being supplied with inert gaseous mixture so that, when said scavenging inlet means are open, the counter-current flow of the inert gaseous mixture produces complete renewal of the atmosphere of the cell considered, without causing the layer of dust deposited on the upstream face of the filtering element(s) of said filtration cell to be detached.
11. The installation as claimed in claim 10, wherein the pneumatic declogging means are formed by a pneumatic device adapted to generate an inert gaseous mixture flow capable of causing the layer of dust deposited on the upstream face of the filtering elements of the cell to be loosened and detached during declogging, when this pneumatic device is put into communication with said cell.
12. The installation as claimed in claim 11, wherein the pneumatic device is connected by the declogging inlet means to each outlet enclosure, these inlet mnans being controllable at will for each outlet enclosure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7905609A FR2450627A1 (en) | 1979-03-05 | 1979-03-05 | IMPROVEMENTS IN THE DECOLMATION PROCESSES FOR FILTRATION INSTALLATIONS AND IN THE FILTRATION INSTALLATIONS IMPLEMENTING THESE PROCESSES |
| FR7905659A FR2450628A1 (en) | 1979-03-05 | 1979-03-05 | IMPROVEMENTS RELATING TO DECOLMATION PROCESSES FOR A FILTRATION INSTALLATION, AND TO FILTRATION INSTALLATIONS IMPLEMENTING SUCH METHODS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2044123A true GB2044123A (en) | 1980-10-15 |
| GB2044123B GB2044123B (en) | 1982-12-15 |
Family
ID=26221046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8007143A Expired GB2044123B (en) | 1979-03-05 | 1980-03-03 | Declogging process for filtration installation |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE3008481A1 (en) |
| GB (1) | GB2044123B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0087191A1 (en) * | 1982-02-12 | 1983-08-31 | Machinefabriek "Brabant"D. van Opstal B.V. | Dust filter |
| EP0357931A1 (en) * | 1988-09-09 | 1990-03-14 | Krupp Koppers GmbH | Pressurized gas filter |
| EP0402032A1 (en) * | 1989-05-30 | 1990-12-12 | Electric Power Research Institute, Inc | Vertically tiered particle filtering apparatus |
| EP0482396A1 (en) * | 1990-10-22 | 1992-04-29 | Westinghouse Electric Corporation | Filtering apparatus |
| US5185019A (en) * | 1990-10-22 | 1993-02-09 | Westinghouse Electric Corp. | Filtering apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10107924A1 (en) * | 2001-02-13 | 2002-09-05 | Huettlin Gmbh | Device for treating particulate material |
-
1980
- 1980-03-03 GB GB8007143A patent/GB2044123B/en not_active Expired
- 1980-03-05 DE DE19803008481 patent/DE3008481A1/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0087191A1 (en) * | 1982-02-12 | 1983-08-31 | Machinefabriek "Brabant"D. van Opstal B.V. | Dust filter |
| EP0357931A1 (en) * | 1988-09-09 | 1990-03-14 | Krupp Koppers GmbH | Pressurized gas filter |
| EP0402032A1 (en) * | 1989-05-30 | 1990-12-12 | Electric Power Research Institute, Inc | Vertically tiered particle filtering apparatus |
| EP0482396A1 (en) * | 1990-10-22 | 1992-04-29 | Westinghouse Electric Corporation | Filtering apparatus |
| US5185019A (en) * | 1990-10-22 | 1993-02-09 | Westinghouse Electric Corp. | Filtering apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2044123B (en) | 1982-12-15 |
| DE3008481A1 (en) | 1980-09-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) |