CN112957864A - Flying ash filtering system for preventing flying ash from entering torch after filter stick breakage - Google Patents
Flying ash filtering system for preventing flying ash from entering torch after filter stick breakage Download PDFInfo
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- CN112957864A CN112957864A CN202110171891.7A CN202110171891A CN112957864A CN 112957864 A CN112957864 A CN 112957864A CN 202110171891 A CN202110171891 A CN 202110171891A CN 112957864 A CN112957864 A CN 112957864A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
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- 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
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0012—In-line filters
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- 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
-
- 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
- B01D46/62—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 series
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
- C10K1/024—Dust removal by filtration
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
- C10K1/026—Dust removal by centrifugal forces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a fly ash filtering system for preventing filter stick fracture fly ash from entering a torch, which comprises a rotary separator, a first filtering mechanism, a high-temperature ceramic filter, a second filtering mechanism, a dust removal filter and a fly ash storage tank. The fly ash filtering system can extract the fly ash carried in the filtered vent gas, recycle the fly ash, save resources, prevent the fly ash from entering a torch system when the filter stick is broken, and avoid environmental pollution.
Description
Technical Field
The invention relates to the technical field of coal chemical industry, in particular to a fly ash filtering system capable of preventing filter rod fracture from entering a torch.
Background
In the IGCC power station, a large amount of fly ash is carried in the synthesis gas generated by the gasification furnace, and the synthesis gas enters an ash removal unit for gas-solid separation. The filtered vent gas needs to be filtered before entering a torch system, and the filtered vent gas is directly discharged into a torch. If the filter stick is broken, the fly ash is carried by the vent gas and enters a torch system, so that the environmental pollution is caused. Meanwhile, the leaked fly ash can not be recycled for secondary utilization, so that part of resources are wasted.
Disclosure of Invention
In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a fly ash filtration system capable of extracting the fly ash carried in the filtered exhaust gas, on the one hand, saving resources, and on the other hand, preventing the fly ash from entering a torch after the filter rod is broken, and avoiding causing environmental pollution.
The invention provides a fly ash filtering system for preventing filter stick fracture fly ash from entering a torch, which comprises a rotary separator, a first filtering mechanism, a high-temperature ceramic filter, a second filtering mechanism, a dust removal filter and a fly ash storage tank, wherein the rotary separator is arranged on the first filtering mechanism; wherein the content of the first and second substances,
the rotary separator is connected with the gasification furnace and is used for separating fly ash in the synthesis gas output by the gasification furnace;
the first filtering mechanism is connected with the rotary separator and used for filtering the fly ash carried in the discharged air separated by the rotary separator and conveying the filtered discharged air to a torch;
the high-temperature ceramic filter is connected with the rotary separator and is used for filtering fly ash in the synthesis gas;
the second filtering mechanism is connected with the high-temperature ceramic filter and is used for filtering the fly ash carried in the discharged air filtered by the high-temperature ceramic filter and conveying the filtered discharged air to the torch;
the dust removal filter is arranged between the first filtering mechanism, the second filtering mechanism and the torch and is used for filtering residual fly ash in the emptying gas;
and the fly ash storage tank is respectively connected with the first filtering mechanism, the second filtering mechanism and the dust removal filter and is used for collecting fly ash.
Preferably, the first filtering mechanism comprises a first fly ash discharge tank connected with the rotary separator, the first fly ash discharge tank is connected with a first fly ash discharge filter and a first fly ash gas-stripping cooling tank, the first fly ash discharge filter is connected with the torch through a first pipeline, a first valve is arranged on the first pipeline, the first fly ash gas-stripping cooling tank is connected with a second fly ash discharge filter, the second fly ash discharge filter is connected with the torch through a second pipeline, a second valve is arranged on the second pipeline, and the first fly ash gas-stripping cooling tank is connected with the fly ash storage tank.
Preferably, the second filtering mechanism comprises a second fly ash discharge tank connected with the high-temperature ceramic filter, the second fly ash discharge tank is connected with a third fly ash discharge filter and a second fly ash gas-stripping cooling tank, the third fly ash discharge filter is connected with the first pipeline between the first fly ash discharge filter and the first valve through a third pipeline, the second fly ash gas-stripping cooling tank is connected with a fourth fly ash discharge filter, the fourth fly ash discharge filter is connected with the second pipeline between the second fly ash discharge filter and the second valve through a fourth pipeline, and the second fly ash gas-stripping cooling tank is connected with the fly ash storage tank.
Preferably, the first pipeline between the third pipeline and the first valve is connected with the dust removal filter through a fifth pipeline, the fifth pipeline is provided with a third valve, the second pipeline between the fourth pipeline and the second valve is connected with the dust removal filter through a sixth pipeline, the sixth pipeline is provided with a fourth valve, the dust removal filter is connected with the torch through a seventh pipeline, and the seventh pipeline is provided with a fifth valve.
Compared with the prior art, the invention has the beneficial effects that:
(1) the fly ash filtering system is provided with a first filtering mechanism and a second filtering mechanism, wherein the first filtering mechanism is connected with the rotary separator and can convey the discharged air separated by the rotary separator to a torch and convey the fly ash to a fly ash storage tank; the second filtering mechanism is connected with the high-temperature ceramic filter, and can convey the filtered air discharged from the high-temperature ceramic filter to a torch and convey the separated fly ash to a fly ash storage tank. The fly ash collected in the fly ash storage tank is used for recycling for secondary use, so that the full utilization of the fly ash is ensured, and the waste of resources is avoided;
(2) the fly ash filtering system is also provided with the dust removal filter, the metal filter rods in the first filtering mechanism and the second filtering mechanism are easy to break after being used for a long time, and the dust removal filter can filter the fly ash in the discharged air entering the torch system after the metal filter rods break, so that the environment pollution caused by a large amount of fly ash entering the torch system is avoided;
(3) through the cooperation between each valve that sets up, can cut off dust removal filter from filtration system, realize dust removal filter's online maintenance.
It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of any embodiment of the invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a schematic diagram of a fly ash filtration system for preventing filter rod breakage of fly ash entering a torch.
Reference numbers in the figures: 11. a rotating separator; 12. a first filter mechanism; 13. a high temperature ceramic filter; 14. a second filter mechanism; 15. a dust removal filter; 16. a fly ash storage tank;
21. a first fly ash discharge tank; 22. a first fly ash blow-down filter; 23. a first fly ash gas stripping cooling tank; 24. a first conduit; 25. a first valve; 26. a second fly ash emptying filter; 27. a second conduit; 28. a second valve;
41. a second fly ash discharge tank; 42. a third fly ash emptying filter; 43. a second fly ash gas-stripping cooling tank; 44. a third pipeline; 45. a fourth fly ash emptying filter; 46. a fourth conduit.
51. A fifth pipeline; 52. a third valve; 53. a sixth pipeline; 54. a fourth valve; 55. a seventh pipe; 56. and a fifth valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, an embodiment of the present invention provides a fly ash filtering system for preventing filter rod breakage from entering a torch, which includes a rotary separator 11, a first filtering mechanism 12, a high temperature ceramic filter 13, a second filtering mechanism 14, a dust removing filter 15 and a fly ash storage tank 16; wherein the content of the first and second substances,
the rotary separator 11 is connected with the gasification furnace and used for separating fly ash in the synthesis gas output by the gasification furnace;
the first filtering mechanism 12 is connected with the rotary separator 11 and used for filtering the fly ash carried in the discharged air separated by the rotary separator 11 and conveying the filtered discharged air to a torch;
the high-temperature ceramic filter 13 is connected with the rotary separator 11 and is used for filtering fly ash in the synthesis gas;
the second filtering mechanism 14 is connected with the high-temperature ceramic filter 13 and is used for filtering the fly ash carried in the discharged air filtered by the high-temperature ceramic filter 13 and conveying the filtered discharged air to the torch;
a dust removal filter 15 disposed between the first and second filtering mechanisms 12 and 14 and the flare for filtering the fly ash remaining in the exhaust gas;
and the fly ash storage tank 16 is respectively connected with the first filtering mechanism 12, the second filtering mechanism 14 and the dust removal filter 15 and is used for collecting fly ash.
In this embodiment, the synthesis gas output from the gasification furnace carries a large amount of fly ash, and after separation by the rotary separator 11 and filtration by the high temperature ceramic filter 13, the clean vent gas is processed by the subsequent units and enters the flare system. The fly ash has excellent filtering effect.
The fly ash is carried in the air separated by the rotary separator 11, the fly ash is treated by the first filtering mechanism 12, the filtered fly ash is sent to the fly ash storage tank 16, and the filtered air is sent to a torch; the fly ash is also carried in the filtered exhaust gas by the high temperature ceramic filter 13, the fly ash is treated by the second filtering mechanism 14, the filtered fly ash is sent to the fly ash storage tank 16, and the filtered exhaust gas is sent to the torch. The fly ash produced by the gasification furnace is ensured to be completely filtered and recovered, the fly ash is recycled for secondary utilization, the resource is saved, and the economic benefit is improved.
The dust removing filter 15 is arranged between the two groups of the first filtering mechanism 12 and the second filtering mechanism 14 and the torch, and when the first filtering mechanism 12 or the second filtering mechanism 14 breaks down, the dust removing filter 15 can ensure that the fly ash is filtered, so that a large amount of fly ash is prevented from entering the torch system to cause environmental pollution.
In a preferred embodiment, as shown in FIG. 1, the first filtering mechanism 12 comprises a first fly ash discharge tank 21 connected to the rotary separator 11, the first fly ash discharge tank 21 is connected to a first fly ash blow-down filter 22 and a first fly ash stripping cooling tank 23, the first fly ash blow-down filter 22 is connected to a torch through a first pipe 24, a first valve 25 is arranged on the first pipe 24, a second fly ash blow-down filter 26 is connected to the first fly ash stripping cooling tank 23, the second fly ash blow-down filter 26 is connected to the torch through a second pipe 27, a second valve 28 is arranged on the second pipe 27, and the first stripping fly ash cooling tank 23 is connected to the fly ash storage tank 16.
In this embodiment, the fly ash separated by the rotary separator 11 enters the first fly ash discharge tank 21, after the pressure relief operation, the discharge gas is sent to the torch through the first pipeline 24, the fly ash enters the first fly ash gas-stripping cooling tank 23, after the pressure relief operation, the residual synthesis gas in the fly ash is sent to the torch through the second pipeline 27, and the fly ash is cooled and then enters the fly ash storage tank 16 for collection. The fly ash is filtered fully, and the recovery rate is high.
When the first fly ash blow-down filter 22 and the second fly ash blow-down filter 26 are operating normally, the first valve 25 and the second valve 28 are in an open state, and the filtered blow-down gas can be sent directly to a torch; when the metal filter stick in the first fly ash emptying filter 22 or the second fly ash emptying filter 26 is bent and broken, the corresponding first valve 25 or the second valve 28 is closed, so that the emptying gas is filtered by the dust removal filter 15, and the environment pollution caused by the fly ash entering a torch is avoided.
In a preferred embodiment, as shown in fig. 1, the second filtering means 14 comprises a second fly ash blowdown tank 41 connected to the pyroceram filter 13, the second fly ash blowdown tank 41 is provided with a third fly ash blowdown filter 42 and a second fly ash strip cooling tank 43 in connection, the third fly ash blowdown filter 42 is connected to the first conduit 24 between the first fly ash blowdown filter 22 and the first valve 25 via a third conduit 44, the second fly ash strip cooling tank 43 is provided with a fourth fly ash blowdown filter 45 in connection, the fourth fly ash blowdown filter 45 is connected to the second conduit 27 between the second fly ash blowdown filter 26 and the second valve 28 via a fourth conduit 46, and the second fly ash strip cooling tank 43 is connected to the storage tank 16.
In this embodiment, the fly ash filtered by the high temperature ceramic filter 13 enters the second fly ash discharge tank 41, after the pressure relief operation, the discharge gas is sent to the torch through the third pipeline 44 and the first pipeline 24 in sequence, the fly ash enters the second fly ash gas-stripping cooling tank 43, after the pressure relief operation, the residual synthesis gas in the fly ash is sent to the torch through the fourth pipeline 46 and the second pipeline 27 in sequence, and the fly ash is collected in the fly ash storage tank 16 after the cooling treatment. The fly ash is filtered fully, and the recovery rate is high.
When the four groups of fly ash emptying filters are in normal operation, the first valve 25 and the second valve 28 are in an open state, and the filtered emptying gas can be directly sent into a torch; when the bending and breaking conditions of the metal filter sticks occur in the four groups of fly ash emptying filters, the corresponding first valve 25 or second valve 28 is closed, so that the emptying gas is filtered by the dust removal filter 15, and the fly ash is prevented from entering a torch to cause environmental pollution.
In a preferred embodiment, as shown in fig. 1, the first conduit between the third conduit 44 and the first valve 25 is connected to the dust filter 15 via 24 a fifth conduit 51, the fifth conduit 51 is provided with a third valve 52, the second conduit 27 between the fourth conduit 46 and the second valve 28 is connected to the dust filter 15 via a sixth conduit 53, the sixth conduit 53 is provided with a fourth valve 54, the dust filter 15 is connected to the flare via a seventh conduit 55, and the seventh conduit 55 is provided with a fifth valve 56.
In this embodiment, the dust removal filter 15 may or may not be introduced into the system when all of the four sets of fly ash emptying filters are in normal operation. The introduction of the dust filter 15 into the system can enhance the filtering effect of the exhaust air, and when the filter bag of the dust filter 15 is damaged and leaked, the third valve 52, the fourth valve 54 and the fifth valve 56 can be closed, the first valve 25 and the second valve 28 can be opened, the dust filter 15 can be cut off from the system for maintenance or repair, and then the dust filter 15 can be introduced into the system again.
When the bending and breaking of the metal filter sticks occur in the four groups of fly ash emptying filters, the corresponding first valve 25 or second valve 28 is closed, and the corresponding third valve 52, fourth valve 54 or fifth valve 56 is opened, so that the emptying gas enters the torch system after being filtered by the dust removal filter 15, and the structural design is reasonable. The problem that the fly ash emptying filter is required to be stopped for maintenance when the filter fails is solved, and the production continuity is ensured. The provision of the dust removal filter 15 allows the system to be serviced during scheduled maintenance periods, avoiding sudden production stops.
In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (4)
1. A fly ash filtering system for preventing fly ash from entering a torch after a filter stick is broken is characterized by comprising a rotary separator, a first filtering mechanism, a high-temperature ceramic filter, a second filtering mechanism, a dust removal filter and a fly ash storage tank; wherein the content of the first and second substances,
the rotary separator is connected with the gasification furnace and is used for separating fly ash in the synthesis gas output by the gasification furnace;
the first filtering mechanism is connected with the rotary separator and used for filtering the fly ash carried in the discharged air separated by the rotary separator and conveying the filtered discharged air to a torch;
the high-temperature ceramic filter is connected with the rotary separator and is used for filtering fly ash in the synthesis gas;
the second filtering mechanism is connected with the high-temperature ceramic filter and is used for filtering the fly ash carried in the discharged air filtered by the high-temperature ceramic filter and conveying the filtered discharged air to the torch;
the dust removal filter is arranged between the first filtering mechanism, the second filtering mechanism and the torch and is used for filtering residual fly ash in the emptying gas;
and the fly ash storage tank is respectively connected with the first filtering mechanism, the second filtering mechanism and the dust removal filter and is used for collecting fly ash.
2. A fly ash filtration system according to claim 1, wherein the first filtration mechanism comprises a first fly ash discharge tank connected to the rotary separator, the first fly ash discharge tank is connected to a first fly ash discharge filter and a first fly ash gas-stripping cooling tank, the first fly ash discharge filter is connected to the torch through a first pipe, the first pipe is provided with a first valve, the first fly ash gas-stripping cooling tank is connected to a second fly ash discharge filter, the second fly ash discharge filter is connected to the torch through a second pipe, the second pipe is provided with a second valve, and the first fly ash gas-stripping cooling tank is connected to the fly ash storage tank.
3. A fly ash filtration system according to claim 2, wherein the second filtration mechanism comprises a second fly ash discharge tank connected to the high temperature ceramic filter, the second fly ash discharge tank is connected to a third fly ash discharge filter and a second fly ash gas-stripping cooling tank, the third fly ash discharge filter is connected to the first pipe between the first fly ash discharge filter and the first valve through a third pipe, the second fly ash gas-stripping cooling tank is connected to a fourth fly ash discharge filter, the fourth fly ash discharge filter is connected to the second pipe between the second fly ash discharge filter and the second valve through a fourth pipe, and the second fly ash gas-stripping cooling tank is connected to the fly ash storage tank.
4. A fly ash filtration system according to claim 3, wherein the first conduit between the third conduit and the first valve is connected to the dust removal filter by a fifth conduit, the fifth conduit being provided with a third valve, the second conduit between the fourth conduit and the second valve being connected to the dust removal filter by a sixth conduit, the sixth conduit being provided with a fourth valve, the dust removal filter being connected to the flare by a seventh conduit, the seventh conduit being provided with a fifth valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110171891.7A CN112957864B (en) | 2021-02-04 | 2021-02-04 | Flying ash filtering system for preventing flying ash from entering torch after filter stick breakage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110171891.7A CN112957864B (en) | 2021-02-04 | 2021-02-04 | Flying ash filtering system for preventing flying ash from entering torch after filter stick breakage |
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| CN112957864A true CN112957864A (en) | 2021-06-15 |
| CN112957864B CN112957864B (en) | 2022-03-25 |
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| CN112957864B (en) | 2022-03-25 |
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