CN205447842U - Heating stove with it is combustion -supporting to divide flame - Google Patents
Heating stove with it is combustion -supporting to divide flame Download PDFInfo
- Publication number
- CN205447842U CN205447842U CN201620128570.3U CN201620128570U CN205447842U CN 205447842 U CN205447842 U CN 205447842U CN 201620128570 U CN201620128570 U CN 201620128570U CN 205447842 U CN205447842 U CN 205447842U
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- CN
- China
- Prior art keywords
- fuel
- combustion
- room
- oxygen
- burner hearth
- 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.)
- Expired - Fee Related
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 103
- 238000010438 heat treatment Methods 0.000 title claims abstract description 21
- 239000000446 fuel Substances 0.000 claims abstract description 115
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 35
- 229910052760 oxygen Inorganic materials 0.000 claims description 35
- 239000001301 oxygen Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000003245 coal Substances 0.000 claims description 22
- 239000000428 dust Substances 0.000 claims description 15
- 238000013517 stratification Methods 0.000 claims description 14
- 230000001413 cellular effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000003063 flame retardant Substances 0.000 claims description 3
- 239000008188 pellet Substances 0.000 abstract 1
- 239000002737 fuel gas Substances 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000002309 gasification Methods 0.000 description 4
- 230000001535 kindling effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical class [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000004449 solid propellant Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Solid-Fuel Combustion (AREA)
Abstract
The utility model discloses a heating stove with it is combustion -supporting to divide flame, it includes the furnace body, the furnace body top is equipped with the fire door, furnace body inside below activity is pegged graft and is had ash tank, be equipped with the grate that admits air on the furnace inner wall of ash tank top, be equipped with the exhaust port on one side lateral wall of furnace body top, it supports fuel -fired furnace row to admit air to be provided with on the furnace inner wall of grate top, for the room of igniting inside the furnace body between grate and the support fuel -fired furnace of admitting air arranges, it is equipped with the charge door on the preceding oven that the room corresponds to ignite, support the inside fuel combustion chamber that is provided with of furnace body that fuel -fired furnace arranged the top, honeycomb type arranges in the fuel combustion chamber has a plurality of combustion tubes, the lower extreme of combustion tube communicates the room of igniting, the combustion tube upper end is passed the fuel combustion chamber and is arranged fuel combustion chamber top in, evenly be provided with a plurality of first air vents on the pipe wall of combustion tube. The utility model provides a heating stove with it is combustion -supporting to divide flame can adopt little pellet fuel, and is with low costs, and simultaneously fuel can complete combustion, reduces the pollution to the environment.
Description
Technical field:
This utility model relates to a kind of heating stove, particularly relates to a kind of heating stove combustion-supporting with point flame.
Background technology:
The most common heating stove air can only enter from furnace bottom, therefore to ensure full combustion of fuel, the little granular fuels such as fire grate spacing arranges relatively big, fine coal easily fall dust stratification groove, form waste；Additionally for ensureing must there be air duct between burner hearth fuel abundant burner hearth fuel, therefore bulky grain patch fuel can only be selected, and bulky grain patch fuel sulfur content is higher, in combustion process, the effective desulfurization of desulfurizing agent cannot be used, so the patch fuel of low sulfur content can only be used, and this kind of fuel often resource is less, and price is higher；And existing heating stove bottom furnace bottom, fuel, in the middle of fuel, fuel top combustion chamber oxygen concentration gradually reduce, in causing fuel chambers, a large amount of carbon monoxides and fuel dust can not burn completely, cause environmental pollution and the wasting of resources.
PracticalNovel content:
The purpose of this utility model is to provide a kind of heating stove combustion-supporting with point flame, solves current heating stove and uses low-sulfur patch fuel price height, cost big and insufficient problem of burning.
nullIn order to solve above-mentioned technical problem，This utility model provides a kind of heating stove combustion-supporting with point flame，It sets the body of heater of burner hearth in including，Described body of heater top is provided with the fire door connected with described burner hearth，Described burner hearth underside is plugged with dust stratification groove，It is provided with air inlet fire grate in described burner hearth above described dust stratification groove，Side sidewall above described body of heater is provided with the exhaust opening connected with described burner hearth，It is characterized in that，Support fuel fire grate it is provided with on described inboard wall of burner hearth above described air inlet fire grate，Described burner hearth between described air inlet fire grate and described support fuel fire grate is room of igniting，Furnace wall corresponding to described room of igniting is provided with the charge door connected with the described room of igniting，It is provided with fuel combustion chamber in described burner hearth above described support fuel fire grate，Described fuel combustion indoor are cellular is arranged with multiple combustion tube，The lower end of described combustion tube connects through described support fuel fire grate with the described room of igniting，Described combustion tube upper end is placed in above described fuel combustion chamber through described fuel combustion chamber，Multiple first passage it is evenly arranged with on the tube wall of described combustion tube.
Preferably, it is disposed with the water tank of point flame burner in described burner hearth above described fuel combustion chamber the most from bottom to up and joins oxygen room, described oxygen room of joining is hollow housing, the described feeding oxygen hole joining oxygen room connects with air register, described air register is placed in outside described body of heater, described oxygen room upper shell of joining is provided with multiple oxygen-distributing hole, the all corresponding mozzle of each described oxygen-distributing hole, described mozzle lower end connects with described combustion tube upper end, and water tank described in the hermetically passing of described mozzle upper end passes from described oxygen-distributing hole, the upper end of described mozzle is provided with water conservancy diversion blast cap, and the internal diameter of described oxygen-distributing hole is more than the external diameter of described mozzle；Be provided with in described point of flame burner and add coal channel, described coal channel seal pass described in join oxygen room and described water tank, described fire door is connected with described fuel combustion chamber, described in add coal channel in movable add to be plugged with add, with described, the sealing plug that coal channel mates.
Preferably, described mozzle be placed in described in join and be evenly arranged with multiple second passage on the tube wall that oxygen is indoor.
Preferably, described furnace body outer wall being provided with water jacket, the water filling port of described water tank side connects with described water jacket.
Preferably, described inboard wall of burner hearth scribbles flame retardant coating.
Advantage of the present utility model: this utility model is by cellular being arranged with multiple combustion tube fuel combustion is indoor, combustion tube tube wall arranges the first through hole, therefore the air needed for fuel combustion is mainly sucked naturally by accessible bottom combustion tube, and can be contacted with fuel by the first through hole, need not retain bigger air duct in the middle of fuel body, so the little granular fuels such as fine coal can be used, little granular fuel can be sufficiently mixed with desulfurizing agent, and then just can use the colm that sulfur content is higher, reduce production cost；Separately it is arranged with multiple combustion tube fuel gas can be assigned in the combustion tube of multiple small volume due to cellular, in the range of so fully fuel gas can being maintained at rational combustion limits, simultaneously in the accessible smooth and easy suction combustion tube of air, it is possible to fully meet fuel gas and burn completely；Separately being provided above a point flame burner due to this utility model furnace interior, when using the fuel of high-volatile, the air that point flame burner joins oxygen indoor enters in mozzle in a large number, is sufficiently mixed with fuel gas, it is achieved burn completely, it is to avoid cause environmental pollution.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of embodiment 1；
Fig. 2 is the structural representation of embodiment 2.
Accompanying drawing is described as follows: 1, body of heater；2, fire door；3, dust stratification groove；4, air inlet fire grate；5, exhaust opening；6, fuel fire grate is supported；7, ignite room；8, charge door；9, combustion tube；10, the first passage；11, water tank；12, oxygen room is joined；13, air register；14, mozzle；15, water conservancy diversion blast cap；16, coal channel is added；17, sealing plug；18, water jacket；19, the second passage；20, oxygen-distributing hole.
Detailed description of the invention:
For making the technical problems to be solved in the utility model, technical scheme and advantage clearer, it is described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Embodiment 1: as it is shown in figure 1, in specific embodiment of the utility model, it is provided that a kind of heating stove combustion-supporting with point flame, it sets the body of heater 1 of burner hearth in including, body of heater 1 top is provided with the fire door 2 connected with burner hearth, and burner hearth underside is plugged with dust stratification groove 3, and dust stratification groove 3 is used for collecting lime-ash；Being provided with air inlet fire grate 4 in burner hearth above dust stratification groove 3, air enters in burner hearth through dust stratification groove 3 from air inlet fire grate 4, and the side sidewall above body of heater 1 is provided with the exhaust opening 5 connected with burner hearth, and flue gas is discharged into outside body of heater 1 by exhaust opening 5；Being provided with support fuel fire grate 6 on inboard wall of burner hearth above air inlet fire grate 4, solid fuel is supporting burning on fuel fire grate 6, supports the size being smaller than burnt fuel of fuel fire grate 6, is traditionally arranged to be 3-30 millimeter；Air inlet fire grate 4 and the burner hearth supported between fuel fire grate 6 are room 7 of igniting, the furnace wall of room 7 correspondence of igniting is provided with the charge door 8 connected with room 7 of igniting, kindling material adds, from charge door 8, room 7 of igniting, light the fuel of room 7 of igniting, it is provided with fuel combustion chamber in supporting the burner hearth above fuel fire grate 6, fuel combustion indoor are used for the fuel that burns, fuel combustion indoor are cellular is arranged with multiple combustion tube 9, the lower end of combustion tube 9 connects through supporting fuel fire grate 6 with room 7 of igniting, combustion tube 9 upper end is placed in above fuel combustion chamber through fuel combustion chamber, multiple first passage 10 it is evenly arranged with on the tube wall of combustion tube 9.The reason arranging room 7 of igniting in this utility model embodiment is to use little granular fuel density big, and it is little to support fuel fire grate 6 spacing, if using traditional being placed in by kindling material above support fuel fire grate 6, it is impossible to light fuel.This utility model embodiment, when concrete addition coal, by using coal hopper, from fire door, coal is joined fuel combustion chamber, is avoided coal is leak into combustion tube during adding coal, causes waste of fuel, and blocking combustion tube.
Work process: the little granular fuel having added desulfurizing agent is joined fuel combustion chamber by fire door, pyrophoric fuel is added by charge door 8, light the fuel of room 7 of igniting, major part flame is divided into multiple shallow bid flame conveniently by combustion tube 9, combustion tube 9 is entered at each combustion tube 9 bottom opening, air is entered fuel combustion chamber by air inlet fire grate 4 and combustion tube 9 simultaneously, in combustion tube 9 under the baking of thermal-flame, the fuel temperature rising that fuel combustion is indoor, reach ignition condition, the air entering fuel near the fuel of combustion tube 9 and the first passage 10 from combustion tube 9 is sufficiently mixed burning, and gasification, and combustion the most from outside to inside, the fuel gas produced during gasification, and combustion enters combustion tube 9 from passage, it is sufficiently mixed burning in combustion tube 9.
Embodiment 2: as in figure 2 it is shown, in specific embodiment of the utility model, it is provided that a kind of heating stove combustion-supporting with point flame, it sets the body of heater 1 of burner hearth in including, body of heater 1 top is provided with the fire door 2 connected with burner hearth, and burner hearth underside is plugged with dust stratification groove 3, and dust stratification groove 3 is used for collecting lime-ash；Being provided with air inlet fire grate 4 in burner hearth above dust stratification groove 3, air enters in burner hearth through dust stratification groove 3 from air inlet fire grate 4, and the side sidewall above body of heater 1 is provided with the exhaust opening 5 connected with burner hearth, and flue gas is discharged into outside body of heater 1 by exhaust opening 5；Support fuel fire grate 6 it is provided with on inboard wall of burner hearth above air inlet fire grate 4, solid fuel is supporting burning on fuel fire grate 6, support fuel fire grate 6 and be smaller than the size of institute's refuelling in heating stove, be traditionally arranged to be 3-30 millimeter, prevent fuel from dropping to burner hearth bottom and cause the waste of fuel；Air inlet fire grate 4 and the burner hearth supported between fuel fire grate 6 are room 7 of igniting, the furnace wall of room 7 correspondence of igniting is provided with the charge door 8 connected with room 7 of igniting, kindling material adds, from charge door 8, room 7 of igniting, light the fuel of room 7 of igniting, the reason arranging room 7 of igniting is to use little granular fuel density big, and it is little to support fuel fire grate 6 spacing, if using traditional being placed in by kindling material above support fuel fire grate 6, it is impossible to light fuel；It is provided with fuel combustion chamber in supporting the burner hearth above fuel fire grate 6, fuel combustion indoor are used for the fuel that burns, fuel combustion indoor are cellular is arranged with multiple combustion tube 9, the lower end of combustion tube 9 connects through supporting fuel fire grate 6 with room 7 of igniting, combustion tube 9 upper end is placed in above fuel combustion chamber through fuel combustion chamber, and the tube wall of combustion tube 9 is evenly arranged with multiple first passage 10；Body of heater 1 above fuel combustion chamber is internally provided with a point flame burner, flame burner is divided to include water tank 11, join oxygen room 12 and air register 13, join oxygen room 12 for hollow housing, water tank 11 is arranged on above fuel combustion chamber, join oxygen room 12 and be arranged on above water tank 11, the feeding oxygen hole joining oxygen room 12 connects with air register 13, air register 13 is placed in outside body of heater 1, join oxygen room 12 upper shell and be provided with multiple oxygen-distributing hole 20, each oxygen-distributing hole 20 is all correspondingly provided with a mozzle 14, mozzle 14 lower end connects with combustion tube 9 upper end, and mozzle 14 upper end sequentially passes through water tank 11 and joins oxygen room 12 and be placed in and join outside oxygen room 12, the upper end of mozzle 14 is provided with water conservancy diversion blast cap 15, and the internal diameter of oxygen-distributing hole 20 is more than the external diameter of mozzle 14；It is provided with in dividing flame burner and adds coal channel 16, add coal channel 16 hermetically passing and join oxygen room 12 and water tank 11, fire door 2 is connected with fuel combustion chamber, in adding coal channel 16, movable adding, is plugged with and adds the sealing plug 17 that coal channel 16 mates, during coal, sealing plug is extracted, adds fuel to fuel combustion chamber from adding coal channel；It is arranged with water jacket 18 on body of heater 1 outer wall, and the water filling port of the water tank 11 of point flame burner connects with water jacket 18, forming a confined space, the water filling port of confined space connects with water source, outlet connects with radiator, by providing thermal source to realize heating purpose for radiator；The purpose arranging water tank 11 is the fuel gas for entering in mozzle 14 to cartridge from below or flame cooling, prevents too high flame temperature from causing damage to joining oxygen room, arranges flame retardant coating on body of heater 1 outer wall, increases the service life of heating stove.
Work process: the little granular fuel having added desulfurizing agent is joined fuel combustion chamber by fire door, pyrophoric fuel is added by charge door 8, light the fuel of room 7 of igniting, major part flame is divided into multiple shallow bid flame conveniently by combustion tube 9, combustion tube 9 is entered at each combustion tube 9 bottom opening, air is entered fuel combustion chamber by air inlet fire grate 4 and combustion tube 9 simultaneously, in combustion tube 9 under the baking of thermal-flame, the fuel temperature rising that fuel combustion is indoor, reach ignition condition, the air entering fuel near the fuel of combustion tube 9 and the first passage 10 from combustion tube 9 is sufficiently mixed burning, and gasification, and combustion the most from outside to inside, the fuel gas produced during gasification, and combustion enters combustion tube 9 from passage, it is sufficiently mixed burning in combustion tube 9.When using the fuel of high-volatile, fuel gas owing to producing is more, the fuel gas that can not burn completely in the combustion tube 9 that fuel combustion is indoor is discharged to join in the mozzle 14 of oxygen room 12, by dividing flame burner that high-temperature combustible gas body or flame are divided into several flammules conveniently, it is sufficiently mixed with the air joining oxygen room 12 supply, realizing burning completely, the gas after burning completely is discharged from exhaust opening 5.
In above-described embodiment of the present utility model, mozzle 14 is placed on the tube wall joined in oxygen room 12 and is provided with multiple second passage 19, fuel gas fully burns with the air (oxygen) come in from the second passage 19, when being not provided with the second passage 19 on mozzle 14 tube wall, entrance is joined the oxygen of oxygen room 11 and is discharged by oxygen-distributing hole 20, and with water conservancy diversion blast cap 15 at flow out fuel gas be mixed to form oxygen-enriched combustible gas, light oxygen-enriched combustible gas and fully burn.
It is above preferred implementation of the present utility model; it should be pointed out that, for those skilled in the art, on the premise of without departing from this utility model principle; can also make some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (5)
- null1. one kind with the combustion-supporting heating stove of point flame，It sets the body of heater of burner hearth in including，Described body of heater top is provided with the fire door connected with described burner hearth，Described burner hearth underside is plugged with dust stratification groove，It is provided with air inlet fire grate in described burner hearth above described dust stratification groove，Side sidewall above described body of heater is provided with the exhaust opening connected with described burner hearth，It is characterized in that，Support fuel fire grate it is provided with on described inboard wall of burner hearth above described air inlet fire grate，Described burner hearth between described air inlet fire grate and described support fuel fire grate is room of igniting，Furnace wall corresponding to described room of igniting is provided with the charge door connected with the described room of igniting，It is provided with fuel combustion chamber in described burner hearth above described support fuel fire grate，Described fuel combustion indoor are cellular is arranged with multiple combustion tube，The lower end of described combustion tube connects through described support fuel fire grate with the described room of igniting，Described combustion tube upper end is placed in above described fuel combustion chamber through described fuel combustion chamber，Multiple first passage it is evenly arranged with on the tube wall of described combustion tube.
- A kind of heating stove combustion-supporting with point flame the most according to claim 1, it is characterized in that, it is disposed with the water tank of point flame burner in described burner hearth above described fuel combustion chamber the most from bottom to up and joins oxygen room, described oxygen room of joining is hollow housing, the described feeding oxygen hole joining oxygen room connects with air register, described air register is placed in outside described body of heater, described oxygen room upper shell of joining is provided with multiple oxygen-distributing hole, the all corresponding mozzle of each described oxygen-distributing hole, described mozzle lower end connects with described combustion tube upper end, and water tank described in the hermetically passing of described mozzle upper end passes from described oxygen-distributing hole, the upper end of described mozzle is provided with water conservancy diversion blast cap, and the internal diameter of described oxygen-distributing hole is more than the external diameter of described mozzle；Be provided with in described point of flame burner and add coal channel, described coal channel seal pass described in join oxygen room and described water tank, described fire door is connected with described fuel combustion chamber, described in add coal channel in movable add to be plugged with add, with described, the sealing plug that coal channel mates.
- A kind of heating stove combustion-supporting with point flame the most according to claim 2, it is characterised in that described mozzle be placed in described in join and be evenly arranged with multiple second passage on the tube wall that oxygen is indoor.
- A kind of heating stove combustion-supporting with point flame the most according to claim 3, it is characterised in that being provided with water jacket on described furnace body outer wall, the water filling port of described water tank side connects with described water jacket.
- A kind of heating stove combustion-supporting with point flame the most according to claim 4, it is characterised in that scribble flame retardant coating on described inboard wall of burner hearth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620128570.3U CN205447842U (en) | 2016-02-18 | 2016-02-18 | Heating stove with it is combustion -supporting to divide flame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620128570.3U CN205447842U (en) | 2016-02-18 | 2016-02-18 | Heating stove with it is combustion -supporting to divide flame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205447842U true CN205447842U (en) | 2016-08-10 |
Family
ID=56581938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620128570.3U Expired - Fee Related CN205447842U (en) | 2016-02-18 | 2016-02-18 | Heating stove with it is combustion -supporting to divide flame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205447842U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439924A (en) * | 2016-11-15 | 2017-02-22 | 重庆华万伦生物新能源科技有限公司 | Multi-layered biofuel heating furnace with coaming |
| CN106439917A (en) * | 2016-11-15 | 2017-02-22 | 重庆华万伦生物新能源科技有限公司 | Multilayer biofuel heating furnace |
| CN107606615A (en) * | 2017-10-18 | 2018-01-19 | 力聚热力设备科技有限公司 | Combustor in slit-aperture type flame combustion apparatus |
-
2016
- 2016-02-18 CN CN201620128570.3U patent/CN205447842U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439924A (en) * | 2016-11-15 | 2017-02-22 | 重庆华万伦生物新能源科技有限公司 | Multi-layered biofuel heating furnace with coaming |
| CN106439917A (en) * | 2016-11-15 | 2017-02-22 | 重庆华万伦生物新能源科技有限公司 | Multilayer biofuel heating furnace |
| CN107606615A (en) * | 2017-10-18 | 2018-01-19 | 力聚热力设备科技有限公司 | Combustor in slit-aperture type flame combustion apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160810 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |