CN108815937B - Multi-medium high-temperature filtering device, pyrolysis system and filtering method - Google Patents
Multi-medium high-temperature filtering device, pyrolysis system and filtering method Download PDFInfo
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- CN108815937B CN108815937B CN201811056706.4A CN201811056706A CN108815937B CN 108815937 B CN108815937 B CN 108815937B CN 201811056706 A CN201811056706 A CN 201811056706A CN 108815937 B CN108815937 B CN 108815937B
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- 238000001914 filtration Methods 0.000 title claims abstract description 162
- 238000000197 pyrolysis Methods 0.000 title claims description 25
- 238000000034 method Methods 0.000 title claims description 18
- 239000012528 membrane Substances 0.000 claims abstract description 74
- 238000007664 blowing Methods 0.000 claims abstract description 32
- 239000004071 soot Substances 0.000 claims abstract description 12
- 238000005192 partition Methods 0.000 claims abstract description 9
- 239000004020 conductor Substances 0.000 claims abstract description 6
- 239000000919 ceramic Substances 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 77
- 239000000428 dust Substances 0.000 claims description 13
- 238000000746 purification Methods 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- 238000009833 condensation Methods 0.000 abstract description 13
- 230000005494 condensation Effects 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000002309 gasification Methods 0.000 description 8
- 239000002737 fuel gas Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000002028 Biomass Substances 0.000 description 4
- 238000004523 catalytic cracking Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000004227 thermal cracking Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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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
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4218—Influencing the heat transfer which act passively, e.g. isolations, heat sinks, cooling ribs
-
- 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
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
-
- 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
- B01D46/72—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 backwash arms, shoes or nozzles
-
- 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
- B01D46/88—Replacing filter elements
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a multi-medium high-temperature filtering device which is characterized in that more than 2 filtering containers are arranged in a staggered or nested way, and each filtering container is respectively provided with a purifying cavity, a supporting plate and an upper cavity; the purifying cavity on each filtering container is separated from the upper cavity by a supporting plate, an opening is arranged on the supporting plate, the filtering membrane is a metal membrane or a high-temperature ceramic membrane, and the upper cavity is provided with a back blowing pipe and a soot blowing opening; the purifying cavity is provided with an inlet, the upper cavity is provided with an outlet, the inlets of the filtering containers are all provided with electric control valves, and the purifying cavities are isolated by a partition wall made of heat conducting materials. The high-temperature gas of one filter container is fully utilized to preheat the other filter containers, the temperature of the inlet of the membrane tube is guaranteed to reach a preset value, the problem that the membrane tube is blocked due to tar condensation and adhesion on the membrane tube is prevented, and meanwhile the continuous maintenance temperature of the membrane tube is continuously guaranteed to be higher than the preset value.
Description
Technical Field
The invention relates to the field of pyrolysis treatment equipment, in particular to a multi-medium high-temperature filtering device and a filtering method.
Background
Biomass, coal and solid waste pyrolysis gasification are one of important ways for converting primary energy into clean secondary energy, and the product is mainly combustible gas and can be deeply processed into high-quality gas such as synthesis gas, hydrogen and the like. The pyrolysis gasification technology has wide application prospect in the aspects of heat supply, electric power, synthetic liquid fuel and the like. However, there is a general problem that a pyrolysis gasification process always generates a certain amount of tar and carries a lot of fine ash particles, which causes difficulty in gas purification, blocks and corrodes pipes, and seriously affects the stable operation of related combustion equipment.
Cyclone separation dust removal technology is mainly reported in the technology of purifying biomass, coal and solid waste crude gas reported in the literature and is used for separation dust removal, water washing purification, filler type filtration, thermal cracking, catalytic cracking and the like. The cyclone separation dust removal technology is the simplest, but because the fluctuation of the gas production amount in the operation process of the biomass gasification furnace is larger, the ideal dust removal effect is difficult to achieve. The most commonly used method at present adopts simple water washing treatment to purify the fuel gas, but because of the existence of a large amount of tar in the pyrolyzed and gasified fuel gas, the sewage discharged by water washing contains more harmful substances such as phenols, benzenes and the like, and the serious pollution problem is brought to the environment. The tar content in the fuel gas is reduced by adopting a catalytic cracking or high-temperature thermal cracking technology at home and abroad, but the tar in the biomass, coal and solid waste crude gas is mainly a condensed ring compound with very complex composition, so that the nickel-based catalyst is easy to be deactivated in the catalytic cracking process, and the production cost of the pyrolysis gasification fuel gas is greatly increased by the application of the catalyst. Therefore, the ash and tar in the high-temperature fuel gas generated by pyrolysis gasification cannot be thoroughly removed by the technical method, and secondary pollution is easily formed due to the tar and the ash.
The problem of tar condensation can be effectively solved by adopting high-temperature combustion of pyrolysis gas, but in order to prevent the pipeline, accessory equipment and a gas burner from being blocked, dust needs to be removed during combustion of the pyrolysis gas, and the temperature of the gas pyrolysis gas is not lower than that of tar condensation before the gas pyrolysis gas enters the burner. Although the existing high-temperature filter container can effectively remove dust, when the filter container device is started, the temperature of a membrane tube of the filter container is lower, tar is extremely easy to condense and adhere to the membrane tube when high-temperature fuel gas hits the membrane tube, so that the membrane tube is blocked, meanwhile, pyrolysis gas generated by pyrolysis or gasification is easy to fluctuate, the temperature fluctuation is large, and the gas is possibly lower than the condensation temperature of the tar, so that the tar is condensed in the membrane tube. Therefore, the filter vessel is necessary to be preheated and maintained at a temperature such that the temperature of the membrane tube is maintained above the condensation temperature of tar while solving the problems of dust removal and prevention of condensation by refueling when the pyrolysis gas is introduced into the filter vessel. The high temperature filter container can effectively remove dust, but when filter container equipment starts, filter container membrane pipe temperature is lower, and when high temperature gas hit the membrane pipe, the tar extremely easily condenses and bonds on the membrane pipe, causes the membrane pipe to block up, and simultaneously, pyrolysis gas that pyrolysis or gasification produced easily fluctuates temperature fluctuation is great, and the gas volume is likely to be less than tar condensation temperature, causes the tar condensation at the membrane pipe. The most conceivable method is therefore to add a heating means to ensure that the temperature of the pyrolysis gas at the time of entering the filtration vessel and the temperature of the filtration vessel itself are maintained above the condensation temperature of the tar, but this necessarily increases the complexity of the apparatus, while at the same time necessarily increasing the energy consumption.
Disclosure of Invention
The technical problem to be solved by the invention is how to ensure that the temperature of the pyrolysis gas when entering the filter container and the temperature of the filter container are maintained above the condensation temperature of tar.
In order to solve the technical problems, the invention designs a multi-medium high-temperature filtering device which is characterized by comprising more than 2 filtering containers, wherein the more than 2 filtering containers are arranged in a staggered or nested way, and the two filtering containers are independently arranged and are isolated by a heat conducting material.
The multi-medium high-temperature filtering device is characterized in that each filtering container is respectively provided with a purifying cavity, a supporting plate and an upper cavity; the purifying cavity on each filtering container is separated from the upper cavity by a supporting plate, openings are arranged on the supporting plate and used for supporting a membrane tube and filtering gas in the purifying cavity through the membrane tube and then discharging the filtered gas to the upper cavity, the filtering membrane is a metal membrane or a high-temperature ceramic membrane, the upper cavity is provided with a back blowing tube, soot blowing openings are arranged at positions corresponding to the openings on each supporting plate, and the soot blowing openings are connected with the back blowing tube; the purifying cavity is provided with an inlet, the upper cavity is provided with an outlet, the inlets of the filtering containers are all provided with electric control valves, and the purifying cavities are isolated by a partition wall made of heat conducting materials.
The multi-medium high-temperature filtering device is characterized by comprising 2 filtering containers, wherein the two filtering containers are a first filtering container and a second filtering container respectively, the inlets of the two filtering containers are connected through a pipeline, and an electric control valve is arranged on the pipeline.
The multi-medium high-temperature filtering device is characterized in that the purifying cavities of the first filtering container are nested in the purifying cavities of the second filtering container, the purifying cavities are mutually independent, and the purifying cavities are isolated by a partition wall.
The multi-medium high-temperature filtering device is characterized in that the purifying cavities of the first filtering container and the second filtering container respectively comprise a plurality of sub-evolution cavities; the sub-purification cavities of the first filter container and the sub-purification cavities of the second filter container are arranged in a staggered mode, are mutually independent and are isolated through a partition wall.
The multi-medium high-temperature filtering device is characterized by further comprising a third filtering container, wherein the purifying cavity of the second filtering container is arranged in the purifying cavity of the third purifying cavity, and the purifying cavities are mutually independent and are isolated by a partition wall.
The multi-medium high-temperature filtering device is characterized in that at least one filtering container is internally provided with a membrane tube.
The pyrolysis system comprises a pyrolysis system and a filtering subsystem, and is characterized in that the filtering subsystem adopts a multi-medium high-temperature filtering device as a filter.
A filtering method is characterized in that the purifying cavities of more than 2 filtering containers are nested or staggered together, and each filtering container is mutually independent; selecting tar-free gas from the gas to be filtered as preheated gas, opening an electric control valve on a filter container connected with the preheated gas, simultaneously respectively monitoring the temperature of the outlet of a membrane tube of other filter containers, and opening the electric control valve on the filter container where the membrane tube is positioned when the temperature of the outlet of the membrane tube reaches or exceeds a preset threshold value.
The filtering method is characterized in that a connecting container is further arranged between the filtering containers, the electric control valves on the filtering containers connected with the preheating gas are opened, meanwhile, the electric control valves on the connecting containers between the filtering containers are also opened, the preheating gas preheats all the filtering containers, meanwhile, the temperatures of the membrane tube outlets of other filtering containers are respectively monitored, when the temperatures of the membrane tube outlets reach or exceed a preset threshold value, the electric control valves on the connecting containers between the filtering containers are closed, meanwhile, high-temperature nitrogen for a period of time is input to the filtering containers except for the preheating gas, and then the electric control valves on the other filtering containers start normal filtering operation.
The implementation of the invention has the following beneficial effects: the high-temperature gas of one filter container is fully utilized to preheat the other filter containers, so that the temperature of the gas containing tar components at the inlet of the membrane tube reaches a preset value when the gas enters the inlet of the membrane tube, the problem that the membrane tube is blocked due to condensation and adhesion of tar on the membrane tube is solved, and the continuous maintenance temperature of the membrane tube is continuously ensured to be higher than the preset value.
Drawings
FIG. 1 is a system block diagram of a multi-media high temperature filtration device comprising two filtration vessels;
FIG. 2 is a system block diagram of a multi-media high temperature filtration device with only one filtration vessel having membrane tubes;
FIG. 3 is a system block diagram of a multi-media high temperature filtration device comprising three filtration vessels;
FIG. 4 is a system block diagram of a multi-media high temperature filtration device with an intermediate filtration vessel without a membrane tube.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
FIG. 1 is a system block diagram of a multi-media high temperature filtration device comprising two filtration vessels; the filter comprises a first filter container 1 and a second filter container 2, wherein an inlet of the second filter container is connected with a second pipeline 24, an inlet of the first filter container is connected with a first pipeline 14, the first pipeline 14 is connected with the second pipeline 24 through a pipeline, a first electric control valve 15 is arranged on the pipeline, and a second electric control valve 25 is also arranged on the second pipeline 24. The whole purifying cavity of the first filtering container 1 is cylindrical, the whole purifying cavity of the second filtering container 2 is circular, and the purifying cavity of the first filtering container 1 is arranged in the purifying cavity of the second filtering container and is isolated by a partition wall made of high-temperature ceramic materials. The first filtering container 1 and the second filtering container 2 are separated by a supporting plate 4, the upper part is respectively an upper cavity 18 of the first filtering container and an upper cavity 28 of the second filtering container, and the lower part is a purifying cavity; the support plate 4 is provided with openings in both the first filter vessel 1 and the second filter vessel 2 for supporting the membrane tubes. The upper cavity is provided with a back-blowing pipe; the purifying cavity is provided with an inlet, the upper cavity is provided with an outlet, and the inlet of each filtering container is provided with an electric control valve; the bottom of the first filtering container 1 is provided with a conical first ash discharging device 16, a plurality of membrane pipes are uniformly arranged on the purifying cavity to form a first matched membrane pipe 13, the upper cavity 18 of the first filtering container is provided with a plurality of first matched ash blowing openings 11 corresponding to the first matched membrane pipe 13, the first matched ash blowing openings 11 are connected with a back blowing pipeline, and the first air outlet 12 is arranged on the side wall of the purifying cavity and is higher than the first matched membrane pipe 13; the bottom of the second filtering container 2 is a conical second ash discharging device 26, a plurality of membrane pipes are uniformly arranged on the purifying cavity to form a second matched membrane pipe 23, an upper cavity 28 of the second filtering container is provided with a plurality of second matched ash blowing openings 21 corresponding to the second matched membrane pipe 23, the second matched ash blowing openings 21 are connected with a back blowing pipeline, and a second air outlet 22 is arranged on the side wall of the purifying cavity and is higher than the second matched membrane pipe 23.
It is assumed that there are two high temperature gases to be filtered at the same time, the two gases cannot be mixed, there is no dust, in particular no tar, on the first gas and the temperature is higher.
The first method of filtration is to connect one gas to the second conduit and the other gas to the first conduit. The implementation method is that the second electric control valve 25 is opened first, the first gas enters the purifying cavity of the second filtering container first, the high temperature gas preheats the purifying cavity of the first filtering container through the side wall, when the inlet of the first matched film tube 13 in the purifying cavity of the first filtering container reaches the preset temperature, the temperature is related to the condensation temperature of tar, and the tar is ensured not to be condensed. After the temperature is reached, the gas in the first filtering container is started to be filtered.
The second filtering method is as follows: one gas is connected to the second pipe and the other gas is connected to the first pipe. The implementation method is that the second electric control valve 25 is firstly opened, the first gas firstly enters the purifying cavity of the second filtering container, meanwhile, the first electric control valve 15 is opened, the high-temperature gas directly enters the purifying cavity of the first filtering container for preheating, and when the inlet of the first matched film tube 13 in the purifying cavity of the first filtering container reaches the preset temperature, the first electric control valve 15 is closed. For safety, the high-temperature N2 gas is input into the first filtering container to clean the gas in front, and then the gas in the first filtering container is started to start filtering.
FIG. 2 is a system block diagram of a multi-media high temperature filtration device having only one filtration vessel with membrane tubes, wherein if there is no dust on the high temperature gas on the second filtration vessel, the second matched membrane tube 23 and the second matched soot blowing port 21 on the second filtration vessel, and the matched device, can be omitted, so the component is provided in a detachable structure, and thus, different requirements can be met flexibly to a greater extent.
Similarly, the second filter vessel may be preheated by injecting the preheated gas into the first filter vessel. Meanwhile, the problem that the temperature fluctuation of single pyrolysis gas generated by pyrolysis is large, so that the temperature of the gas can be lower than the condensation temperature of tar at certain moments, and the tar is condensed on a membrane tube can be solved.
When larger accumulated ash exists on the filter container after the filter container is operated for a period of time, the filter can be cleaned simply by back blowing through the back blowing pipe to the back blowing through the matched soot blowing ports and discharging through the corresponding soot discharging ports.
More filtering containers can be contained, and the high-temperature filtering requirement of more media can be met simultaneously. FIG. 3 is a system block diagram of a multi-media high temperature filtration device comprising three filtration vessels; a third filter container 3 is added on the basis of two, the inlet of the third filter container is connected with a third pipeline 34, the third pipeline 34 is connected with a second pipeline 24 through a pipeline, and a third electric control valve 35 is arranged on the pipeline. The whole purifying cavity of the third filtering container 3 is in a circular ring shape, and the purifying cavity of the second filtering container 2 is arranged in the purifying cavity of the third filtering container 3 and is isolated by a partition wall made of high-temperature ceramic materials. Corresponding to the nesting arrangement of the first filter container, the second filter container and the third filter container. The first filtering container 1, the second filtering container 2 and the third filtering container 3 are all separated by a supporting plate 4, the upper parts are respectively an upper cavity 18 of the first filtering container, an upper cavity 28 of the second filtering container and an upper cavity 38 of the second filtering container, and the lower parts are purifying cavities; the support plate 4 is provided with openings for supporting the membrane tubes in the first filter vessel 1, the second filter vessel 2 and the third filter vessel 3. The upper cavity is provided with a back-blowing pipe; the purifying cavity is provided with an inlet, and the upper cavity is provided with an outlet. The third ash discharging device 36 with the conical bottom of the third filtering container 1 is uniformly provided with a plurality of membrane pipes on the purifying cavity to form a third matched membrane pipe 33, the upper cavity 38 of the third filtering container is provided with a plurality of third matched ash blowing ports 31 corresponding to the third matched membrane pipe 33, the third matched ash blowing ports 31 are connected with back blowing pipelines, and the third air outlet 32 is arranged on the side wall of the purifying cavity and is higher than the third matched membrane pipe 33.
The second filter vessel is preferably arranged in the middle as a preliminary heating vessel, and the gas having the highest temperature is generally selected to pass through the second filter vessel. If multiple filtering gases contain tar and dust, high-temperature gases without tar can be selected, N2 nitrogen is fed into the filtering device, the gases are pre-injected through the second filtering container, the gases can be simultaneously injected into the first filtering container and the third filtering container, the first filtering container, the second filtering container and the third filtering container are respectively used for preheating the purifying cavities, when the temperature of the membrane tube of each cavity reaches the preset temperature, the gas with the highest temperature is fed into the second filtering container in the middle, other gases are respectively fed into the first filtering container and the third filtering container for filtering, and in the process, the second filtering container continuously provides heat sources for the first filtering container and the third filtering container, so that the temperature of the membrane tube in the cavity is kept above the tar condensing temperature.
FIG. 4 is a system block diagram of a multi-media high temperature filtration device with an intermediate filtration vessel without a membrane tube. If the high-temperature gas on the second filtering container has no dust, the second matched film tube 23, the second matched soot blowing port 21 and the matched devices on the second filtering container can be omitted, so that the part is arranged into a detachable structure, and different requirements can be met flexibly to a greater extent. Of course, the removal of unnecessary membrane tubes and soot blowing openings in other filter vessels is also an option.
The above disclosure is illustrative of only one embodiment of the present invention and is not intended to limit the scope of the claims, and one of ordinary skill in the art will understand that all or a portion of the above embodiments may be implemented and equivalents may be substituted for elements thereof while the invention would be encompassed by the present claims.
Claims (7)
1. The multi-medium high-temperature filtering device is characterized by being used for filtering at least two high-temperature gases to be filtered, wherein the at least two high-temperature gases to be filtered cannot be mixed, one gas is free of dust and tar, and the temperature of the gas is higher than that of other gases; the multi-medium high-temperature filtering device comprises more than 2 filtering containers, wherein the more than 2 filtering containers are nested, the filtering containers are arranged independently, and the filtering containers are isolated by heat conducting materials;
each filtering container is respectively provided with a purifying cavity, a supporting plate and an upper cavity; the bottom of the filtering container is a conical ash discharging device; a plurality of membrane tubes are uniformly arranged on the purifying cavity of at least one filtering container; the purifying cavity on each filtering container is separated from the upper cavity by a supporting plate, openings are arranged on the supporting plate and used for supporting a membrane tube and filtering gas in the purifying cavity through the membrane tube and then discharging the filtered gas to the upper cavity, the filtering membrane is a metal membrane or a high-temperature ceramic membrane, the upper cavity is provided with a back blowing tube, soot blowing openings are arranged at positions corresponding to the openings on each supporting plate, and the soot blowing openings are connected with the back blowing tube; the purifying cavity is provided with an inlet, the upper cavity is provided with an outlet, the inlets of the filtering containers are all provided with electric control valves, and the purifying cavities are isolated by a partition wall made of heat conducting materials.
2. The multi-medium high-temperature filter device according to claim 1, comprising 2 filter containers, namely a first filter container and a second filter container, wherein the inlets of the two filter containers are connected through a pipeline, and an electric control valve is arranged on the pipeline.
3. The multi-media high temperature filtration device of claim 2, wherein the purification cavities of the first filtration vessel are nested within the purification cavities of the second filtration vessel, the purification cavities are independent of each other, and the purification cavities are separated by a separation wall.
4. The multi-media high temperature filter device of claim 2, further comprising a third filter vessel, wherein the purification chambers of the second filter vessel are disposed in the purification chambers of the third purification chamber, the purification chambers are independent of each other, and the purification chambers are separated by a separation wall.
5. A pyrolysis system comprising a pyrolysis system and a filtration subsystem, wherein the filtration subsystem employs the multi-media high temperature filtration device of any one of claims 1 to 4 as a filter.
6. A filtering method is characterized in that more than 2 purifying cavities of filtering containers are nested together, and each filtering container is mutually independent; each filtering container is respectively provided with a purifying cavity, a supporting plate and an upper cavity; a plurality of membrane tubes are uniformly arranged on the purifying cavity of at least one filtering container; the purifying cavity on each filtering container is separated from the upper cavity by a supporting plate, openings are arranged on the supporting plate and used for supporting a membrane tube and filtering gas in the purifying cavity through the membrane tube and then discharging the filtered gas to the upper cavity, the filtering membrane is a metal membrane or a high-temperature ceramic membrane, the upper cavity is provided with a back blowing tube, soot blowing openings are arranged at positions corresponding to the openings on each supporting plate, and the soot blowing openings are connected with the back blowing tube; the purifying cavity is provided with an inlet, the upper cavity is provided with an outlet, the inlets of the filtering containers are all provided with electric control valves, and the purifying cavities are isolated by a partition wall made of a heat conducting material;
selecting gas without tar content from gas to be filtered as preheated gas, opening an electric control valve on a filter container connected with the preheated gas, simultaneously respectively monitoring the temperature of the outlet of a membrane tube of other filter containers, and opening the electric control valve on the filter container where the membrane tube is positioned when the temperature of the outlet of the membrane tube reaches or exceeds a preset threshold value.
7. The filtering method according to claim 6, wherein a connection container is further provided between the respective filter containers, the electrically controlled valves on the connection containers between the respective filter containers are opened while the electrically controlled valves on the filter containers connected to the preheating gas are opened, the preheating gas is allowed to preheat all the filter containers while the temperatures at the outlets of the membrane tubes of the other filter containers are monitored, respectively, and when the temperatures at the outlets of the membrane tubes reach or exceed a preset threshold value, the electrically controlled valves on the connection containers between the respective filter containers are closed, while the electrically controlled valves on the other filter containers are opened except for the high-temperature nitrogen gas which is supplied to the filter container where the preheating gas is located for a while, and normal filtering operation is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811056706.4A CN108815937B (en) | 2018-09-11 | 2018-09-11 | Multi-medium high-temperature filtering device, pyrolysis system and filtering method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811056706.4A CN108815937B (en) | 2018-09-11 | 2018-09-11 | Multi-medium high-temperature filtering device, pyrolysis system and filtering method |
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| CN108815937A CN108815937A (en) | 2018-11-16 |
| CN108815937B true CN108815937B (en) | 2023-06-16 |
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