CN115289489A - Boiler flue gas waste heat degree of depth recovery plant and flue gas air heat exchanger - Google Patents
Boiler flue gas waste heat degree of depth recovery plant and flue gas air heat exchanger Download PDFInfo
- Publication number
- CN115289489A CN115289489A CN202210947094.8A CN202210947094A CN115289489A CN 115289489 A CN115289489 A CN 115289489A CN 202210947094 A CN202210947094 A CN 202210947094A CN 115289489 A CN115289489 A CN 115289489A
- Authority
- CN
- China
- Prior art keywords
- water
- flue gas
- heat exchanger
- air
- boiler
- 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.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Abstract
The invention relates to the technical field of boiler waste heat recovery, in particular to a boiler flue gas waste heat deep recovery device. The top of an air channel of the flue gas-air heat exchanger is provided with a water distribution groove, the water distribution groove is provided with water distribution holes which are uniformly distributed along the heat exchange wall, a flue gas outlet of the boiler is communicated with a flue gas inlet of the gas-water heat exchanger, and a flue gas outlet of the gas-water heat exchanger is communicated with a flue gas inlet of the flue gas-air heat exchanger; the water inlet of the boiler is communicated with the first water outlet of the water-water heat exchanger, the water outlet of the boiler is communicated with the first water inlet of the water-water heat exchanger, the water outlet of the gas-water heat exchanger is communicated with the second water inlet of the water-water heat exchanger, and the water inlet of the gas-water heat exchanger is communicated with the second water outlet of the water-water heat exchanger; the air inlet of the boiler is communicated with the air outlet of the flue gas-air heat exchanger, so that the problem of incompatible heat capacity of flue gas and air is solved.
Description
Technical Field
The invention relates to the technical field of boiler waste heat recovery, in particular to a boiler flue gas waste heat deep recovery device and a flue gas air heat exchanger.
Background
Fuels such as natural gas, oil, living beings contain a large amount of hydrogen elements, and the boiler combustion produces a large amount of vapor, can produce 1.55kg vapor like 1m natural gas combustion, and latent heat volume is about 3600kJ, accounts for the 10% of natural gas low order calorific capacity, but this part heat often directly discharges the atmosphere along with the flue gas, causes the waste of flue gas waste heat. Therefore, if the temperature of the flue gas can be lowered to below the dew point and the latent heat can be recovered, it is important to save fuel consumption. Air gas heater is the important device in boiler waste heat recovery technical field, utilizes low temperature environment air and flue gas to carry out the heat transfer, nevertheless because air channel only has the sensible heat change, and steam among the flue gas channel condenses, takes place the phase transition at flue gas channel for the heat capacity becomes incompatible (that is to say the heat of release when the vapor in the flue gas channel condenses and the absorptive heat of air mismatch), so can't accomplish the degree of depth and retrieve the flue gas waste heat.
The prior art is as a boiler flue gas waste heat degree of depth recovery unit of 201710038254.6, including the boiler, soda heat exchanger, water-water heat exchanger and N level flue gas-air total heat exchange unit, the device makes the middle fluid become the fixed thermal capacity fluid of multistage through adopting multistage formula air-flue gas total heat exchange process, make the thermal capacity of flue gas and air more match, realize higher total heat exchange efficiency, but the device does not fundamentally solve the incompatible problem of flue gas and air heat capacity, in addition still exist and take up an area of too big, the operation adjusts complicated problem.
Disclosure of Invention
The invention provides a novel boiler flue gas waste heat deep recovery device and a flue gas air heat exchanger, aiming at solving the problems that the existing boiler flue gas waste heat deep recovery device does not fundamentally solve the problem of incompatible heat capacities of flue gas and air and has the problems of overlarge occupied area and complex operation and adjustment.
The invention is realized by adopting the following technical scheme: a boiler flue gas preheating deep recovery device comprises a boiler, a gas-water heat exchanger, a water-water heat exchanger and a flue gas-air heat exchanger, wherein the flue gas-air heat exchanger comprises a plurality of flue gas channels and air channels which are arranged at intervals through heat exchange walls, the top of each air channel is provided with two strip-shaped water distribution grooves which are respectively arranged along the length direction of the heat exchange walls on the two sides of the air channel, the water distribution grooves are provided with a plurality of water distribution holes which are tightly attached to the heat exchange walls and are uniformly distributed along the length direction of the heat exchange walls, water (known by the technical personnel in the field, and is supplied with water through a water supply pipe) enters the air channels through the water distribution holes to form water films, a flue gas outlet of the boiler is communicated with a flue gas inlet of the gas-water heat exchanger, a flue gas outlet of the gas-water heat exchanger is communicated with a flue gas inlet of the gas-water-air heat exchanger, and a flue gas outlet of the gas-air heat exchanger is used for discharging flue gas into the atmosphere; the water inlet of the boiler is communicated with the first water outlet of the water-water heat exchanger, the water outlet of the boiler is communicated with the first water inlet of the water-water heat exchanger after passing through a hot user, the water outlet of the gas-water heat exchanger is communicated with the second water inlet of the water-water heat exchanger, and the water inlet of the gas-water heat exchanger is communicated with the second water outlet of the water-water heat exchanger; the air inlet of the flue gas-air heat exchanger is used for introducing air, and the air inlet of the boiler is communicated with the air outlet of the flue gas-air heat exchanger.
The working principle is as follows: high-temperature flue gas in the boiler is subjected to heat exchange through the gas-water heat exchanger and the flue gas-air heat exchanger in sequence and then is discharged into the atmosphere through a flue gas outlet of the flue gas-air heat exchanger to form a flue gas total heat exchange passage; the method comprises the following steps that after being heated and humidified by a flue gas-air heat exchanger, ambient air enters a boiler for combustion supporting to form an ambient air total heat exchange passage, wherein a water distribution groove and water distribution holes are arranged on the top of an air pipeline of the flue gas-air heat exchanger, so that heat exchange walls on two sides of the air channel form a water film, in the heat exchange process, the heat of flue gas firstly heats the water film, and meanwhile, heat and humidity transfer is formed through an interface of the water film and air to humidify and heat the air, so that the problem that the heat capacity of the flue gas and the air is incompatible is solved; water in the gas-water heat exchanger flows into a second water inlet of the water-water heat exchanger after exchanging heat with flue gas through the gas-water heat exchanger, then flows back to the gas-water heat exchanger from a second water outlet of the water-water heat exchanger after passing through the water-water heat exchanger, enters from a first water inlet of the water-water heat exchanger after passing through a heat consumer at a water outlet of the boiler, flows out from a first water outlet of the water-water heat exchanger after exchanging heat in the water-water heat exchanger, and then enters the boiler from a water inlet of the boiler to form a water exchange path.
The utility model provides a flue gas air heat exchanger, includes a plurality of flue gas passageways and the air passage through heat transfer wall interval arrangement, and every air passage's top all is equipped with two strip water distribution grooves of arranging along the length direction of the heat transfer wall of air passage both sides respectively, is equipped with a plurality of water distribution holes of hugging closely the heat transfer wall and along the length direction equipartition of heat transfer wall on the water distribution groove, and water forms the water film through water distribution hole entering air passage. The flue gas air exchanger is provided with the water distribution groove and the water distribution holes through the top of the air pipeline, so that the heat exchange walls on two sides of the air channel form water films, in the heat exchange process, the heat of flue gas firstly heats the water films, and meanwhile, heat and humidity transfer is formed through the interface of the water films and air, so that the air is humidified and heated, and the problem that the heat capacity of the flue gas and the air is incompatible is solved.
The beneficial effects produced by the invention are as follows: 1) The flue gas-air heat exchanger is skillfully improved, and the water distributor and the water distribution hole structure are added, so that a water film is formed in the air channel, the problem of flue gas-water-air heat capacity incompatibility is solved, and in addition, the water film has longer falling time compared with liquid drops, can perform full heat and humidity exchange, and has remarkable heat exchange effect; 2) According to the invention, through the three streams of formed fluids of the flue gas, the air and the water film, when the three streams of fluids meet the flow matching condition, the total heat exchange efficiency of the flue gas and the air is obviously improved, so that the final flue gas temperature is reduced, the lowest flue gas temperature can be reduced to the environmental temperature, and the flue gas waste heat can be completely recovered; 3) The invention increases the air humidity by independently humidifying in the air channel of the flue gas air heat exchanger, improves the problem of flue gas dew point and reduces the discharge of nitrogen oxides.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a first structural schematic diagram of a flue gas-air heat exchanger;
FIG. 3 is a second schematic structural view of a flue gas-air heat exchanger;
FIG. 4 is a third schematic structural view of a flue gas-air heat exchanger;
FIG. 5 is a schematic view of a water distribution tank.
In the figure: 1-boiler, 2-gas-water heat exchanger, 3-water heat exchanger, 4-flue gas-air heat exchanger, 5-water distribution tank, 6-water distribution hole, 7-water film, 8-first overflow water outlet, 9-second overflow water outlet.
Detailed Description
As shown in fig. 1 to 5, a boiler flue gas preheating depth recovery device comprises a boiler 1, a gas-water heat exchanger 2, a water-water heat exchanger 3 and a flue gas-air heat exchanger 4, wherein the flue gas-air heat exchanger 4 comprises a plurality of flue gas channels and air channels which are arranged at intervals through heat exchange walls, the top of each air channel is provided with two strip-shaped water distribution grooves 5 which are respectively arranged along the length direction of the heat exchange walls on the two sides of the air channel, the water distribution grooves 5 are provided with a plurality of water distribution holes 6 which are tightly attached to the heat exchange walls and are uniformly distributed along the length direction of the heat exchange walls, water enters the air channels through the water distribution holes 6 to form water films 7, a flue gas outlet of the boiler 1 is communicated with a flue gas inlet of the gas-water heat exchanger 2 through a pipeline a flue gas outlet of the gas-water heat exchanger 2 is communicated with a flue gas inlet of the flue gas-air heat exchanger 4 through a pipeline b, and a flue gas outlet c of the gas-air heat exchanger 4 is used for discharging flue gas into the atmosphere; the water inlet of the boiler 1 is communicated with a first water outlet of the water-water heat exchanger 3 through a pipeline i, the water outlet of the boiler 1 is communicated with a first water inlet of the water-water heat exchanger 3 through a pipeline h after passing through a hot user through a pipeline j, the water outlet of the gas-water heat exchanger 2 is communicated with a second water inlet of the water-water heat exchanger 3 through a pipeline g, and the water inlet of the gas-water heat exchanger 2 is communicated with a second water outlet of the water-water heat exchanger 3 through a pipeline f; the air inlet d of the flue gas air heat exchanger 4 is used for introducing air, and the air inlet of the boiler 1 is communicated with the air outlet of the flue gas air heat exchanger 4 through a pipeline e.
The working principle is as follows: high-temperature flue gas in the boiler 1 sequentially passes through the gas-water heat exchanger 2 and the flue gas-air heat exchanger 4 for heat exchange and then is discharged into the atmosphere through a flue gas outlet of the flue gas-air heat exchanger 4 to form a flue gas total heat exchange passage; ambient air enters the boiler 1 for combustion supporting after being heated and humidified by the flue gas-air heat exchanger 4 to form an ambient air total heat exchange passage, wherein the flue gas-air heat exchanger is provided with a water distribution tank 5 and water distribution holes 6 through the top of an air pipeline, so that heat exchange walls at two sides of the air channel form a water film 7, in the heat exchange process, the heat of flue gas firstly heats the water film 7, and meanwhile, heat and humidity transfer is formed through an interface of the water film 7 and air to humidify and heat the air, so that the problem of incompatibility of the heat of the flue gas and the air is solved; water in the gas-water heat exchanger 2 flows into the second water inlet of the water-water heat exchanger 3 after exchanging heat with flue gas through the gas-water heat exchanger 2, then flows back to the gas-water heat exchanger 2 from the second water outlet of the water-water heat exchanger 3 after passing through the water-water heat exchanger 3, the water outlet of the boiler 1 enters from the first water inlet of the water-water heat exchanger 3 after passing through the heat consumer, flows out from the first water outlet of the water-water heat exchanger 3 after exchanging heat in the water-water heat exchanger 3, and then enters the boiler 1 from the water inlet of the boiler 1, and a water exchange passage is formed.
During specific implementation, the flue gas channel side of the flue gas air heat exchanger 4 is provided with a first overflow water outlet 8, and in the process of heat exchange of flue gas and air, part of vapor in the flue gas can become condensed water and flows out from the first overflow water outlet 8, so that accumulated water is prevented from being caused on the flue gas channel side of the flue gas air heat exchanger 4, and the heat exchange effect is not affected. The flue gas passageway side of gas water heat exchanger 2 is equipped with second overflow delivery port 9, and the in-process that the flue gas carries out the heat transfer with water, partial vapor in the flue gas can become the comdenstion water and flow out from second overflow delivery port 9 to cause ponding at the flue gas passageway side of gas water heat exchanger 2, influence heat transfer effect. The number of the flue gas-air heat exchangers 4 is multiple, and the plurality of flue gas-air heat exchangers 4 are connected in series (in series connection, the flue gas outlet of each stage of flue gas-air heat exchanger is connected with the flue gas inlet of the next stage of heat and humidity exchanger, the air outlet of each stage of flue gas-air heat exchanger is connected with the air inlet of the next stage of flue gas-air heat exchanger, and the air outlet of the last stage of flue gas-air heat exchanger is connected with the flue gas inlet of the boiler). The number of the flue gas-air heat exchangers 4 is multiple, and the multiple flue gas-air heat exchangers 4 are connected in parallel (parallel connection: the flue gas outlet of the gas-water heat exchanger is connected with the flue gas inlet of the multiple flue gas-air heat exchangers through a parallel pipeline, and the air outlet of the multiple flue gas-air heat exchangers is connected with the flue gas inlet of the boiler). The cross section of the water chute is U-shaped. The water distribution holes 6 are round. The gas-water heat exchanger 2 adopts a direct contact type heat exchanger or an indirect contact type heat exchanger. The water source of the water film is water flowing out of the first overflow water outlet 8 or/and the second overflow water outlet 9, condensed water is recovered, and water resources are fully utilized or can be communicated with other water sources. The flow direction of the water film on the air channel side in the flue gas air heat exchanger 4 is parallel or perpendicular to the air flow direction.
A flue gas air heat exchanger comprises a plurality of flue gas channels and air channels which are arranged at intervals through heat exchange walls, the top of each air channel is provided with two strip-shaped water distribution grooves 5 which are respectively arranged along the length direction of the heat exchange walls on the two sides of the air channel, the cross section of each water distribution groove 5 is U-shaped, a plurality of water distribution holes 6 which are tightly attached to the heat exchange walls and uniformly distributed along the length direction of the heat exchange walls are arranged on each water distribution groove 5, each water distribution hole 6 is circular, water enters the air channel through each water distribution hole 6 to form a water film 7, the flue gas air heat exchanger is provided with the water distribution grooves 5 and the water distribution holes 6 through the top of the air pipeline, so that the heat exchange walls on the two sides of the air channel form the water films 7, in the heat exchange process, the heat of flue gas firstly heats the water films 7, meanwhile, the heat and humidity transfer is formed through the interfaces of the water films 7 and the air, the incompatible air is humidified and heated, and the heat of the flue gas and the air is solved.
Claims (10)
1. The boiler flue gas preheating deep recovery equipment is characterized by comprising a boiler (1), a gas-water heat exchanger (2), a water-water heat exchanger (3) and a flue gas-air heat exchanger (4), wherein the flue gas-air heat exchanger (4) comprises a plurality of flue gas channels and air channels which are arranged at intervals through heat exchange walls, the top of each air channel is provided with two strip-shaped water distribution grooves (5) which are respectively arranged along the length direction of the heat exchange walls on the two sides of the air channel, the water distribution grooves (5) are provided with a plurality of water distribution holes (6) which are tightly attached to the heat exchange walls and uniformly distributed along the length direction of the heat exchange walls, water enters the air channels through the water distribution holes (6) to form water films (7), a flue gas outlet of the boiler (1) is communicated with a flue gas inlet of the gas-water heat exchanger (2), a flue gas outlet of the gas-water heat exchanger (2) is communicated with a flue gas inlet of the flue gas-air heat exchanger (4), and a flue gas outlet of the flue gas-air heat exchanger (4) is used for discharging flue gas to the atmosphere; a water inlet of the boiler (1) is communicated with a first water outlet of the water-water heat exchanger (3), a water outlet of the boiler (1) is communicated with a first water inlet of the water-water heat exchanger (3) after passing through a hot user, a water outlet of the gas-water heat exchanger (2) is communicated with a second water inlet of the water-water heat exchanger (3), and a water inlet of the gas-water heat exchanger (2) is communicated with a second water outlet of the water-water heat exchanger (3); an air inlet of the flue gas-air heat exchanger (4) is used for introducing air, and an air inlet of the boiler (1) is communicated with an air outlet of the flue gas-air heat exchanger (4).
2. The boiler flue gas preheating deep recovery device according to claim 1, wherein a first overflow water outlet (8) is arranged at the flue gas channel side of the flue gas air heat exchanger (4).
3. The boiler flue gas preheating deep recovery device according to claim 2, wherein a second overflow water outlet (9) is arranged at the flue gas channel side of the gas-water heat exchanger (2).
4. The boiler flue gas preheating deep recovery device according to claim 3, wherein the number of flue gas air heat exchangers (4) is multiple, and multiple flue gas air heat exchangers (4) are connected in series or in parallel.
5. The boiler flue gas preheating deep recovery device according to claim 4, characterized in that the gas-water heat exchanger (2) adopts a direct contact type heat exchanger or an indirect contact type heat exchanger.
6. The boiler flue gas preheating deep recovery device according to claim 5, wherein the flow direction of the water film at the air passage side in the flue gas-air heat exchanger (4) is parallel or perpendicular to the air flow direction.
7. The boiler flue gas preheating deep recovery device according to claim 6, wherein the water source of the water film is water flowing out of the first overflow water outlet (8) or/and the second overflow water outlet (9).
8. The utility model provides a flue gas air heat exchanger, its characterized in that includes a plurality of flue gas passageways and the air duct through heat transfer wall interval arrangement, and every air duct's top all is equipped with two strip water distribution grooves (5) of arranging along the length direction of the heat transfer wall of air duct both sides respectively, is equipped with a plurality of water distribution holes (6) of hugging closely the heat transfer wall and along the length direction equipartition of heat transfer wall on water distribution groove (5), and water forms water film (7) through water distribution hole (6) entering air duct.
9. The flue gas air heat exchanger according to claim 8, wherein the cross section of the water distribution tank (5) is U-shaped.
10. A flue gas air heat exchanger according to claim 9 wherein the water distribution holes (6) are circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210947094.8A CN115289489A (en) | 2022-08-09 | 2022-08-09 | Boiler flue gas waste heat degree of depth recovery plant and flue gas air heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210947094.8A CN115289489A (en) | 2022-08-09 | 2022-08-09 | Boiler flue gas waste heat degree of depth recovery plant and flue gas air heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115289489A true CN115289489A (en) | 2022-11-04 |
Family
ID=83828957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210947094.8A Pending CN115289489A (en) | 2022-08-09 | 2022-08-09 | Boiler flue gas waste heat degree of depth recovery plant and flue gas air heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115289489A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117628920A (en) * | 2024-01-25 | 2024-03-01 | 山西三水能源股份有限公司 | Heat supply equipment for low-temperature heat exchange |
-
2022
- 2022-08-09 CN CN202210947094.8A patent/CN115289489A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117628920A (en) * | 2024-01-25 | 2024-03-01 | 山西三水能源股份有限公司 | Heat supply equipment for low-temperature heat exchange |
| CN117628920B (en) * | 2024-01-25 | 2024-04-05 | 山西三水能源股份有限公司 | Heat supply equipment for low-temperature heat exchange |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107687634A (en) | The denitration of boiler full load couples fume afterheat gradient utilization system | |
| EP1306639A3 (en) | Method and apparatus for vaporizing fuel for a reformer fuel cell system | |
| CN115289489A (en) | Boiler flue gas waste heat degree of depth recovery plant and flue gas air heat exchanger | |
| CN206496364U (en) | A kind of residual heat from boiler fume depth retracting device | |
| CN106765268B (en) | Boiler flue gas waste heat degree of depth recovery unit | |
| CN102494546B (en) | Air heating coil unit condensed water afterheat utilization system for primary-effect flash evaporation | |
| CN201827879U (en) | Horizontal natural-circulation heat exchanger | |
| CN203231327U (en) | Smoke heat exchanging system | |
| CN206739626U (en) | A kind of wall-hung boiler and its heat exchange mechanisms | |
| CN217635734U (en) | Steam and circulating water combined air heater | |
| CN109812795A (en) | A kind of heat-exchange system | |
| CN201582901U (en) | Hot-water heating system | |
| CN209639098U (en) | Step heats multi-energy complementation type water and recycles ground heating system host | |
| CN210662785U (en) | Heat exchanger of steam generating equipment | |
| CN113390284A (en) | Household fuel cell waste heat utilization system and method | |
| CN2622558Y (en) | Heat-exchange system for coal-saving device | |
| CN202835536U (en) | Gas hot water heating device and system | |
| CN201434624Y (en) | Combined heat exchanger with multiple phase change units | |
| CN112432361A (en) | Condensation heat exchanger of central heating system | |
| CN206919709U (en) | A kind of flue gas heat-exchange unit | |
| CN205137516U (en) | Air heater based on air water heat transfer | |
| JPS602889A (en) | Heat exchanging device | |
| KR20080056364A (en) | Heat exchanger for condensing boiler | |
| CN205227937U (en) | Heat exchanger of outdoor unit of air conditioner | |
| CN218954854U (en) | Steam engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |