CN110186191A - Bearing hot water boiler - Google Patents
Bearing hot water boiler Download PDFInfo
- Publication number
- CN110186191A CN110186191A CN201910600424.4A CN201910600424A CN110186191A CN 110186191 A CN110186191 A CN 110186191A CN 201910600424 A CN201910600424 A CN 201910600424A CN 110186191 A CN110186191 A CN 110186191A
- Authority
- CN
- China
- Prior art keywords
- water
- boiler
- hot water
- bearing hot
- condenser
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 239000003546 flue gas Substances 0.000 claims abstract description 34
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims description 18
- 238000002485 combustion reaction Methods 0.000 claims description 15
- 239000000779 smoke Substances 0.000 claims description 9
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229920000914 Metallic fiber Polymers 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
- F24H8/006—Means for removing condensate from the heater
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
- F24H9/0036—Dispositions against condensation of combustion products
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Abstract
The embodiment of the invention provides a kind of bearing hot water boilers, the bearing hot water boiler includes boiler body and the condenser that is connect with boiler body by exhaust gases passes, and the flue gas that bearing hot water boiler generates directly contact progress heat exchange with the return water of heating system by exhaust gases passes in condenser.Bearing hot water high efficiency boiler energy conservation provided in an embodiment of the present invention, securely and reliably.
Description
Technical field
The present invention relates to boiler technology fields, more particularly to a kind of bearing hot water boiler.
Background technique
Gas-fired condensing boiler, be by the water vapour in condensation flue gas so that the latent heat of vaporization therein is recycled,
To improve the boiler of the thermal efficiency.The key of condensing boiler is condensation technology, is the technology of a kind of novel energy-conserving, environmental protection；It
Principle and uncomplicated, simple to summarize be exactly thermal energy by flue gas condensing, in recovered flue gas, to reach raising boiler
The purpose of efficiency.
In conventional gas boiler, exhaust gas temperature is even higher generally at 120~180 DEG C, so that fuel (such as natural gas:
CH4+2O2→CO2+2H2The water generated when O) burning, is water vapour in an overheated state in flue gas, with flue gas from chimney
It is lost.The conventional boiler thermal efficiency generally can only achieve 85%~91%.And gas-fired condensing boiler, exhaust gas temperature is reduced to 58 by it
Hereinafter, sufficiently having recycled the latent heat of vaporization of the sensible heat and water vapour in flue gas, the thermal efficiency reaches as high as 106% for DEG C condensation temperature
(being calculated by Lower heat value).
Conventional gas boiler energy-saving effect is poor, takes up a large area, and heating rate is slow: traditional condensing boiler is changed using tubular type
Hot device, heat transfer coefficient is small, and heat transfer effect is poor, and heating rate is slow when boiler controller system starts, and the time needed is long.And to obtain
Condensation effect, only increase heat exchange area, occupied area are very big.
Conventional gas boiler service life is short, and there are security risks: traditional condensing boiler uses pipe heat exchanger, condensed water
It condenses on tube wall, it may occur that low-temperature corrosion, trommel cause to reveal, and not only boiler service life is short, and influence boiler
Safe and stable operation.
Summary of the invention
The present invention provides a kind of bearing hot water boiler, and being able to solve boiler in the prior art, not environmentally energy conservation, service life are short
Problem.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of bearing hot water boiler is provided, is held
Pressure hot-water boiler includes boiler body and the condenser that connect with boiler body by exhaust gases passes, the generation of bearing hot water boiler
Flue gas is directly contacted in condenser with the return water of heating system by exhaust gases passes and carries out heat exchange.
Wherein, the inner wall of condenser be equipped with water spraying tray, water spraying tray have multiple holes, return water pass through multiple Kong Houyu flue gases into
The direct heat exchange of row.
Wherein, water spraying tray is multiple, and interval setting in the vertical direction.
Wherein, the left wall of the one of one end of adjacent water spraying tray and condenser connects, the right wall of the other end and condenser
It is not connected to；The left wall of another one end of adjacent water spraying tray and condenser is not connected to, the right wall connection of the other end and condenser.
Wherein, the top of condenser is equipped with the water inlet entered for return water and going out for the flue gas outflow after heat exchange
Mouth, outlet flue are connected with chimney, and the lower part of condenser is equipped with the water outlet for the return water outflow after heat exchange, and water outlet connects
It is connected to water pump.
Wherein, bearing hot water boiler further includes gas collector, and gas collector is connected to the top of boiler body by heat exchanger channels,
Return water is drawn in boiler body by water pump be heated to preset temperature after by gas collector provided heat supply by hot duct.
Wherein, the top of boiler body is equipped with smoke pipe, and smoke pipe is separately connected with heat exchanger channels and exhaust gases passes.
Wherein, the lower part of boiler body is equipped with combustion chamber, and combustion chamber is submerged in water.
Wherein, corrugated internal furnace is equipped in combustion chamber, the flue gas and be coated on outside corrugated internal furnace water that bearing hot water boiler generates
Water carry out heat exchange.
Wherein, bearing hot water boiler further includes air blower and burner, and burner one end is connect with air blower, the other end with
Boiler body connection, air blower are used to absorb the air of burning.
Bearing hot water boiler provided in an embodiment of the present invention is by passing through flue gas for the flue gas of the generation of bearing hot water boiler
Channel directly contacts with the return water of heating system and carries out heat exchange, and gas-fired condensing boiler provided in an embodiment of the present invention efficiently saves
Can, securely and reliably.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, in which:
Fig. 1 is the structural principle simplified schematic diagram of one embodiment of bearing hot water boiler of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment belongs to the scope of protection of the invention.
Referring to Fig. 1, Fig. 1 is the structural principle simplified schematic diagram of one embodiment of bearing hot water boiler of the present invention.The present invention is real
The bearing hot water boiler for applying example includes air blower 21, burner 22, boiler body 11, smoke pipe 19, exhaust gases passes 12, condenser
13, chimney 14, water pump 15, gas collector 16 and hot duct 17.
Air blower 21 is used to absorb the air of burning.
Burner 22 is used for fuel combustion, and 22 one end of burner is connect with air blower 21, and the other end and boiler body 11 connect
It connects, burner 22 is set to the lower part of boiler body 11, and combustion chamber is submerged in water.The burner 22 of the present embodiment is using full premix
Metallic fiber surface-type low NO 22 is using specialty metal fiber as burning surface, and combustion intensity can achieve
2500kw/ ㎡, flame is short, only the one third of conventional diffusion formula flame.In this way, combustion chamber 20 is many with regard to relative decrease, pot
Furnace overall dimensions reduce.Corrugated internal furnace 201 is whole cylindrical.
The top of boiler body 11 is equipped with smoke pipe 19, and smoke pipe 19 is separately connected with heat exchanger channels 18 and exhaust gases passes 12, collects
Gas device 16 is connected to the top of boiler body 11 by heat exchanger channels 18, and return water is drawn in boiler body 11 by water pump 15 and is heated
Through providing heat supply by hot duct 17 by gas collector 16 after to preset temperature.
The top of condenser 13 is equipped with the water inlet 132 entered for return water and going out for the flue gas outflow after heat exchange
Mouth (does not indicate), and outlet flue is connected with chimney 14, and the lower part of condenser 13 is equipped with going out for the return water outflow after heat exchange
The mouth of a river 133, water outlet 133 are connected with water pump 15.The inner wall of condenser 13 is equipped with water spraying tray 131, and water spraying tray 131 has multiple
Hole, return water passes through multiple holes and flue gas carries out heat exchange.In the present embodiment, water spraying tray 131 is multiple, and in the vertical direction
Interval setting.Adjacent one of one end of water spraying tray 131 is connect with the left wall of condenser 13, the right side of the other end and condenser 13
Wall is not connected to；The left wall of adjacent another one end of water spraying tray 131 and condenser 13 is not connected to, the right side of the other end and condenser 13
Wall connection.It is able to extend residence time of the flue gas in condenser 13 by above-mentioned setting, flue gas is allowed sufficiently to participate in heat exchange.?
In the present embodiment, water spraying tray 131 is sieve-like stephanoporate steel plate, and return water is dispersed into the tiny water flow of multiply by multiple holes, and water flow is in
Column or drops will not be taken away by flue gas, and heat exchange effect is good.
The structure of the bearing hot water boiler of the embodiment of the present invention is described above, 1 illustrates the present embodiment with reference to the accompanying drawing
Bearing hot water boiler the course of work.
Combustion air enters burner 22 by the sucking of air blower 21 and participates in burning, and air and natural gas are in burner 22
The high-temperature flue gas that interior full combustion generates carries out heat exchange with corrugated internal furnace 201 submerged in water first, then via smoke pipe
19 carry out heat exchange by the heating system return water in exhaust gases passes 12 and condenser 13, return water from the top of condenser 13 into
The mouth of a river 132 enters, and carries out sufficient heat exchange by stacked layer by layer water spraying tray 131 and high-temperature flue gas, so that return water heating, high
Warm flue gas cool-down, the flue gas after cooling are flowed out from outlet flue, are discharged into atmosphere via chimney 14, return water is drawn to boiler by water pump 15
It is heated in ontology 11 after preset temperature through providing heat supply by hot duct 17 by gas collector 16, since the boiler of this example is
Bearing hot water boiler, preset temperature is generally 100 degrees Celsius or more, and has pressure.
The bearing hot water boiler of the embodiment of the present invention has the advantage that
1. energy-efficient: air water direct heat-exchanging type combustion gas bearing hot water boiler is directly connect in condenser using flue gas and water
The latent heat of the sensible heat and vapor in flue gas has strongly been recycled in touch heat exchange, and all condensed water is cold by return water in flue gas
But water is condensed into during, is mixed with return water, is played the role of recycling condensed water, is greatly improved the heat of equipment
Efficiency.
2. the automation of height, building automation connection, unmanned management.
3. volume is more small and exquisite: first is that because air water direct heat-exchanging type combustion gas bearing hot water boiler uses metallic fiber surface
Combustion burner is using specialty metal fiber as burning surface, and combustion intensity can achieve 2500kw/ ㎡, and flame is short, only
For the one third of conventional diffusion formula flame.In this way, combustion chamber is many with regard to relative decrease, boiler overall dimensions reduce；Second is that adopting
The condenser designed with unique water spraying tray heat exchange structure, so that the volume and weight of equipment is much smaller than traditional pot of same specification
The condenser of furnace.It is mountable to the top of basement, annex or building.
4. the simple condenser of unique efficient: it is simple to manufacture, it is non-maintaining, and also return water sprays naturally by gravity, not power consumption,
Operating cost is low；It is uniformly mixed with flue gas, no dead angle；Return water is in the form of a column or drops, will not be taken away by flue gas, condensation effect
It is good.
5. environmentally protective: air water direct heat-exchanging type combustion gas bearing hot water boiler is using full premix surface fiber combustor, combustion
Burn high-efficient, the discharge amount of the stack gas emissions NOx of boiler is less than 30mg/m3.Well below international and local boiler smoke row
Put the related request in standard.
6. long service life: when directly exchanging heat, the solubility of oxygen is reduced when water heats up for flue gas and water, plays deoxygenation
Effect, system are not necessarily to oxygen-eliminating device, reduce the oxygen corrosion of heating surface, extend the service life of boiler.And due to molten in water
A small amount of CO2 is entered, has kept water in furnace weakly acidic, the generation of scale can be inhibited, so not needing softened water equipment, has made boiler
Boiler auxiliary system in room simplifies.
7. reducing haze: flue gas and water directly absorb the ultra tiny flue dust in flue gas when directly exchanging heat, because
This, eliminates PM2.5 to the full extent, reduces haze.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of bearing hot water boiler, which is characterized in that the bearing hot water boiler include boiler body and with the boiler sheet
The condenser that body is connected by exhaust gases passes, the flue gas that the bearing hot water boiler generates are by the exhaust gases passes and heating
Directly contact carries out heat exchange to the return water of system in the condenser.
2. bearing hot water boiler according to claim 1, which is characterized in that the inner wall of the condenser is equipped with water spraying tray,
The water spraying tray has multiple holes, and the return water passes through flue gas described in the multiple Kong Houyu and carries out direct heat exchange.
3. bearing hot water boiler according to claim 2, which is characterized in that the water spraying tray is multiple, and in vertical side
Interval setting upwards.
4. bearing hot water boiler according to claim 3, which is characterized in that adjacent one of one end of the water spraying tray
It is connect with the left wall of the condenser, the right wall of the other end and the condenser is not connected to；The adjacent water spraying tray another
One end and the left wall of the condenser are not connected to, and the other end is connect with the right wall of the condenser.
5. bearing hot water boiler according to claim 4, which is characterized in that the top of the condenser is equipped with for described
The water inlet that return water enters and the outlet flue for the flue gas outflow after heat exchange, the outlet flue are connected with chimney, institute
The lower part for stating condenser is equipped with the water outlet flowed out for the return water after heat exchange, and the water outlet is connected with water pump.
6. bearing hot water boiler according to claim 5, which is characterized in that the bearing hot water boiler further includes gas collection
Device, the gas collector are connected to the top of the boiler body by heat exchanger channels, and the return water is drawn to institute by the water pump
It states after being heated to preset temperature in boiler body through providing heat supply by hot duct by the gas collector.
7. bearing hot water boiler according to claim 6, which is characterized in that the top of the boiler body is equipped with smoke pipe,
The smoke pipe is separately connected with the heat exchanger channels and the exhaust gases passes.
8. bearing hot water boiler according to claim 1-7, which is characterized in that the lower part of the boiler body is set
Combuster, the combustion chamber are submerged in water.
9. bearing hot water boiler according to claim 8, which is characterized in that be equipped with corrugated internal furnace, institute in the combustion chamber
The flue gas for stating the generation of bearing hot water boiler carries out heat exchange with the water being coated on outside the corrugated internal furnace water.
10. bearing hot water boiler according to claim 9, which is characterized in that the bearing hot water boiler further includes air blast
Machine and burner, described burner one end are connect with the air blower, and the other end is connect with the boiler body, the air blower
For absorbing the air of burning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910600424.4A CN110186191A (en) | 2019-07-04 | 2019-07-04 | Bearing hot water boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910600424.4A CN110186191A (en) | 2019-07-04 | 2019-07-04 | Bearing hot water boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110186191A true CN110186191A (en) | 2019-08-30 |
Family
ID=67725032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910600424.4A Pending CN110186191A (en) | 2019-07-04 | 2019-07-04 | Bearing hot water boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110186191A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020001962A (en) * | 2000-06-28 | 2002-01-09 | 김철병 | Condensing gas boiler |
| CN202747616U (en) * | 2012-07-02 | 2013-02-20 | 苗苏宁 | Plate type gas combustion and condensation type hot water boiler |
| CN106051736A (en) * | 2016-07-19 | 2016-10-26 | 北京华林联合热能技术有限公司 | Condensed steam boiler |
| CN106091382A (en) * | 2016-07-19 | 2016-11-09 | 北京华林联合热能技术有限公司 | Gas-fired condensing boiler and heat-exchanger rig thereof |
| CN206919399U (en) * | 2017-05-02 | 2018-01-23 | 山西奥通环保自动锅炉有限公司 | A kind of vacuum phase changing hot water boiler |
| CN210374078U (en) * | 2019-07-04 | 2020-04-21 | 北控清洁热力有限公司 | Pressure-bearing hot water boiler |
-
2019
- 2019-07-04 CN CN201910600424.4A patent/CN110186191A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020001962A (en) * | 2000-06-28 | 2002-01-09 | 김철병 | Condensing gas boiler |
| CN202747616U (en) * | 2012-07-02 | 2013-02-20 | 苗苏宁 | Plate type gas combustion and condensation type hot water boiler |
| CN106051736A (en) * | 2016-07-19 | 2016-10-26 | 北京华林联合热能技术有限公司 | Condensed steam boiler |
| CN106091382A (en) * | 2016-07-19 | 2016-11-09 | 北京华林联合热能技术有限公司 | Gas-fired condensing boiler and heat-exchanger rig thereof |
| CN206919399U (en) * | 2017-05-02 | 2018-01-23 | 山西奥通环保自动锅炉有限公司 | A kind of vacuum phase changing hot water boiler |
| CN210374078U (en) * | 2019-07-04 | 2020-04-21 | 北控清洁热力有限公司 | Pressure-bearing hot water boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201662226U (en) | Condensation-type gas-fired heating water heater | |
| CN106123339B (en) | A kind of condensing vacuum boiler | |
| CN106091382A (en) | Gas-fired condensing boiler and heat-exchanger rig thereof | |
| CN106918050A (en) | A kind of residual heat from boiler fume depth retracting device | |
| CN109405288A (en) | Oil field waste heat of flue gas of heating furnace recyclable device | |
| CN208312424U (en) | Condensed water is used for the heat recovery system of low nitrogen burning | |
| CN207081212U (en) | A kind of deep condensation wall hanging furnace system | |
| CN203478176U (en) | Large horizontal type internal combustion fire-tube hot water boiler externally provided with smoke water heat exchanger | |
| CN206905317U (en) | A kind of economical gas wall-hung boiler | |
| CN102331085A (en) | Integral condensing boiler | |
| CN105258097A (en) | Multifunctional fuel energy-saving hot-water steam boiler | |
| CN210374077U (en) | Gas condensation vacuum phase-change boiler | |
| CN210374078U (en) | Pressure-bearing hot water boiler | |
| CN205842615U (en) | A kind of biomass efficient horizontal boiler | |
| CN201757419U (en) | Environment-friendly and energy-saving boiler | |
| CN104949335B (en) | A kind of efficient horizontal condensation gas industry boiler | |
| CN110186191A (en) | Bearing hot water boiler | |
| CN106051736A (en) | Condensed steam boiler | |
| CN203642148U (en) | Combined boiler for saturated vapor | |
| CN207763546U (en) | Gas fired-boiler flue gas waste heat recovery apparatus | |
| CN206037002U (en) | Condensation steam boiler | |
| CN206222340U (en) | A kind of formaldehyde exhaust combustion and heat recovery system | |
| CN207035496U (en) | A kind of condensation gas boiler | |
| CN207716659U (en) | Vertical condensation hot-water boiler | |
| CN206235022U (en) | Gas-fired condensing boiler and its heat-exchanger rig |
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 |