CN106288370A - Gas fired-boiler based on multi-hole medium combustion technology - Google Patents
Gas fired-boiler based on multi-hole medium combustion technology Download PDFInfo
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- CN106288370A CN106288370A CN201610807386.6A CN201610807386A CN106288370A CN 106288370 A CN106288370 A CN 106288370A CN 201610807386 A CN201610807386 A CN 201610807386A CN 106288370 A CN106288370 A CN 106288370A
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- hydroecium
- backfire
- heat
- combustor
- combustion
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- 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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/44—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with combinations of two or more of the types covered by groups F24H1/24 - F24H1/40 , e.g. boilers having a combination of features covered by F24H1/24 - F24H1/40
-
- 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
-
- 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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention relates to gas fired-boiler based on multi-hole medium combustion technology, including premixed device, a number of combustion heat-exchange unit and connection casing；Described a number of combustion heat-exchange unit connects by connecting casing, combustion heat-exchange unit is centrosymmetric distribution around connecting casing, connect casing and combustion heat-exchange unit outer wrap has shell, being filled with insulation material at shell with being connected between casing and combustion heat-exchange unit, premixed device is arranged on the top connecting casing；Described combustion heat-exchange unit includes anti-backfire structure, combustor, afterbody heat exchanger and inlet plenum, and the side wall surface of described inlet plenum is welded with two premixed gas inlet tubes；Described anti-backfire structure is made up of anti-backfire hydroecium and anti-backfire inlet channel, anti-backfire inlet channel is embedded in anti-backfire hydroecium by welding, anti-backfire hydroecium front end is connected with inlet plenum, connects combustor in anti-backfire hydroecium rear end, and the outlet at combustor is disposed with afterbody heat exchanger.
Description
Technical field
The present invention relates to surround combustor with heat exchange hydroecium and realized the water heater technology of waste heat recovery by heat-exchanger rig
Field, a kind of gas fired-boiler based on multi-hole medium combustion technology.
Background technology
Along with optimizing and revising of China's energy resource structure, gas fired-boiler because of have economy, efficiently, the characteristic of environmental protection and extremely close
Note.But efficiency of energy utilization and environmental contaminants are discharged and are also proposed higher requirement, existing combustion gas by countries in the world
Boiler thermal output is relatively low, and pollutant emission is higher.In order to improve the efficiency of boiler, existing technology is by increasing heat exchange area
Or increase waste-heat recovery device, this makes the structure of boiler more complicated, and volume is bigger.Existing gas fired-boiler nearly all uses
Traditional combustion mode, combustion zone temperature is higher, NOxDischarge capacity bigger.
Summary of the invention
The technical problem to be solved is: provide a kind of gas fired-boiler based on multi-hole medium combustion technology, by
Multiple combustion heat-exchange unit form, and use the furnace type structure of symmetric arrays.Combustor in each combustion heat-exchange unit is by heat exchange
Hydroecium is divided into several zonules, fills heterogeneous porous medium material in combustor, make full use of multi-hole medium combustion and
Heat transfer characteristic, both ensure that heat transfer effect, again limit ignition temperature, it is achieved that low NOxDischarge.Overcome existing gas fired-boiler
Volume is big, the thermal efficiency is low and the NO because ignition temperature is too highxDischarge high shortcoming.Capacity according to boiler can use 2-12
Combustion heat-exchange unit is arranged symmetrically with so that gas fired-boiler has bigger Load Regulation ability.
The present invention solves this technical problem and be the technical scheme is that
Gas fired-boiler based on multi-hole medium combustion technology, including premixed device, a number of combustion heat-exchange unit and company
Connect casing；Described a number of combustion heat-exchange unit by connect casing connect, combustion heat-exchange unit around connect casing in
Centrosymmetry is distributed, and connecting casing and combustion heat-exchange unit outer wrap has shell, shell be connected casing and combustion heat-exchange
Being filled with insulation material between unit, premixed device is arranged on the top connecting casing；
Described combustion heat-exchange unit includes anti-backfire structure, combustor, afterbody heat exchanger and inlet plenum, described inlet plenum
Side wall surface is welded with two premixed gas inlet tubes；Described anti-backfire structure is by anti-backfire hydroecium and anti-backfire inlet channel structure
Becoming, anti-backfire inlet channel is embedded in anti-backfire hydroecium by welding, and anti-backfire hydroecium front end is connected with inlet plenum, is preventing back
Fire hydroecium rear end connects combustor, and the outlet at combustor is disposed with afterbody heat exchanger, combustor and afterbody heat exchanger and is placed in
In combustor inner, by anti-backfire inlet channel UNICOM's inlet plenum and combustor；Aperture is filled up in anti-backfire inlet channel
Gap porous media material；Being intervally distributed with a number of heat exchange hydroecium in the inner shell of described combustor, combustor is by some numbers
The heat exchange hydroecium of amount is divided into multiple burning zonule, is filled with heterogeneous porous medium material in each combustor zonule
Material, at the two ends up and down of each combustor zonule, and arranges refractory brick at combustor inner；Anti-backfire inlet channel
Columns is identical with the quantity of combustor zonule；In combustor upstream, and the part being connected with anti-backfire hydroecium leaves space,
Igniter electrodes is fixedly mounted in this space；
It is welded with anti-backfire hydroecium water inlet pipe and anti-backfire hydroecium outlet pipe on anti-backfire hydroecium, heat exchange hydroecium is welded with
Heat exchange hydroecium outlet pipe and heat exchange hydroecium water inlet pipe, the closed at both ends of described heat exchange hydroecium water inlet pipe, and be provided with an entrance and
A number of outlet, the quantity of outlet is consistent with the quantity of heat exchange hydroecium, each outlet one heat exchange hydroecium of UNICOM respectively；Anti-
Tempering hydroecium outlet pipe is connected with the entrance of heat exchange hydroecium water inlet pipe, a number of heat exchange hydroecium of each combustion heat-exchange unit
Outlet be all connected with heat exchange hydroecium outlet pipe；
Described afterbody heat exchanger includes afterbody heat exchanger tube, afterbody heat exchanger entrance collector and afterbody heat exchanger exit collector,
The two ends of afterbody heat exchanger tube are respectively welded on afterbody heat exchanger entrance collector and afterbody heat exchanger exit collector, afterbody heat exchanger tube
Fix with the sidewall of combustor inner and be connected；By connecting water between afterbody heat exchanger exit collector and anti-backfire hydroecium water inlet pipe
Pipe is connected；
Described connection casing includes a number of connection box side, connection roof box and connects box bottom, institute
State that to connect the quantity of box side consistent with the quantity of combustion heat-exchange unit, a number of connection box side, connection casing
The cabinet space that top board and connection box bottom are surrounded constitutes flue gas merging chamber, and each connection box side is respectively with corresponding
The plate-side plate welding of the combustor inner of combustion heat-exchange unit together, connect roof box and connect box bottom respectively with accordingly
The top board of combustor inner of combustion heat-exchange unit and base plate weld together；The bottom connecting casing is chamfered edge taper knot
Structure, connecting box bottom center weld has the condensed water merging chamber of cylindrical shape, and condensed water merging chamber is welded with drain pipe and row
Smoke pipe；
Connect box bottom and ring-type boiler inlet collector is set, boiler inlet collector is welded with boiler water inlet pipe, pot
The a number of outlet consistent with combustion heat-exchange element number, this outlet and corresponding combustion it is provided with on stove inlet header
The afterbody heat exchanger entrance collector burning heat exchange unit connects, and ring-type boiler inlet collector is installed and combustion heat-exchange element number
Consistent a number of water valve；The top connecting casing is provided with ring-type boiler export collector, and boiler export collector sets
Being equipped with several water inlets consistent with combustion heat-exchange element number and an outlet, this water inlet changes with corresponding burning respectively
The heat exchange hydroecium outlet pipe of hot cell connects, and the outlet of boiler water outlet collector is welded with hot water outlet pipe.
Compared with prior art, the invention has the beneficial effects as follows:
The substantive features that the present invention highlights are: the present invention uses heterogeneous porous medium Regenerative Combustion Technology, and burning is more
Stable, combustion intensity is big, and good effect of heat exchange, pollutant emission is low.(1) combustor is divided into several communities by heat exchange hydroecium
Territory, cold water medium and heating medium-tight laminating, both ensure that the intensity of burning, and combustion heat release amount passes rapidly and efficiently simultaneously
Pass cold water medium, reduce the ignition temperature in combustor；Its method is exactly filling heterogeneous porous medium in combustor
Material, the heat in high temperature porous medium passes to, by the form of radiation and heat conduction, the cold water medium that heat-exchanging water is indoor.(2) exist
Combustor exit arranges waste heat recovery district, collects sensible heat and the latent heat of water vapour of high-temperature flue gas；Its method is after burner
End arranges afterbody heat exchanger so that water recovery in high-temperature flue gas and discharge the heat of condensation.(3) premix gas is entering combustor
Before first pass through the inlet channel of anti-backfire hydroecium, be filled with fine pore porous media material in inlet channel, premixed gas entered
Row rectification, improves its flow velocity, prevents tempering；(4) water of heat exchange hydroecium is the water after first passing through the preheating of afterbody heat exchanger, is conducive to
Improve the temperature of combustion chamber wall surface, reduce owing to wall is supercool and the problem of condensed water occur, improve the burning at wall simultaneously
Condition, improves the completeness of burning.
The marked improvement of the present invention is:
(1) porous media material arrangement architecture in the combustor of present invention gas fired-boiler based on multi-hole medium combustion technology
For non-homogeneous type, flow resistance is less, burns more stable, and combustor is divided into several zonules by heat exchange hydroecium, dispersion
Burning, effectively reduces ignition temperature, it is achieved that low NOxDischarge.
(2) symmetrical structure centered by present invention gas fired-boiler based on multi-hole medium combustion technology, comprises 2-12 burning
Heat exchange unit, can control unit work according to the demand of thermic load, have bigger Load Regulation ability.
(3) present invention gas fired-boiler based on multi-hole medium combustion technology is condenser boiler, absorbs to greatest extent
Combustion heat release amount, overcomes the boiler plant volume of prior art compared with big and that the thermal efficiency is relatively low shortcoming.
It is the lowest that the present invention utilizes the enhanced heat exchange characteristic of porous media to make flue gas be reduced in combustor, the most again in combustion
Burning room afterbody and supplement afterbody heat exchanger, make flue-gas temperature reduce further, whole apparatus structure is compact, than traditional boiler body
Amass and be substantially reduced.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is that the present invention has facing of the gas fired-boiler based on multi-hole medium combustion technology of 4 combustion heat-exchange unit
Generalized section；
Fig. 2 is the vertical view that the present invention has the gas fired-boiler based on multi-hole medium combustion technology of 4 combustion heat-exchange unit
Generalized section；
Fig. 3 is that case study on implementation described in present invention gas fired-boiler based on multi-hole medium combustion technology Fig. 1 is at the A-A of position
Generalized section；
Fig. 4 is that case study on implementation described in present invention gas fired-boiler based on multi-hole medium combustion technology Fig. 1 is at the B-B of position
Generalized section；
Fig. 5 is the gas fired-boiler embodiment based on multi-hole medium combustion technology with 6 combustion heat-exchange unit, connecting box
The top cross-sectional view of body.
In figure, 1. premixed gas inlet tube, 2. inlet plenum, 3. insulation material, 4. anti-backfire inlet channel, 5. shell, 6.
Anti-backfire hydroecium water inlet pipe, 7. connecting water pipe, 8. heat exchange hydroecium outlet pipe, 9. refractory brick, 10. afterbody heat exchanger exit collector,
11. boiler export collectors, 12. premixed gas liaison tubes, 13. injectors, 14. premixers, 15. connect box side, and 16. connect
Roof box, 17. premixed gas outlets, 18. stop valves, 19. air nozzles, 20. gas nozzles, 21. heat exchange hydroecium water inlets
Pipe, 22. boiler inlet collectors, 23. water valves, 24. afterbody heat exchanger entrance collectors, 25. drain pipies, 26. smoke exhaust pipes, 27. condensations
Water merging chamber, 28. connection box bottoms, 29. afterbody heat exchanger tubes, 30. spacers, 31. combustor inner, 32. igniter electrodes,
33. anti-backfire hydroecium outlet pipes, 34. heterogeneous porous medium materials, 35. anti-backfire hydroeciums, 36. fine pore porous media materials
Material, 37. boiler water inlet pipes, 38. hot water outlet pipes, 39. heat exchange hydroeciums, 40. combustor.
Detailed description of the invention
Present invention gas fired-boiler based on multi-hole medium combustion technology (being called for short boiler, see Fig. 1-4) is if including premixed device
The combustion heat-exchange unit of dry quantity and connection casing；Described a number of combustion heat-exchange unit connects by connecting casing, combustion
Burning heat exchange unit and be centrosymmetric distribution around connecting casing, connection casing and combustion heat-exchange unit outer wrap have shell 5,
Shell 5 is filled with insulation material 3 with being connected between casing and combustion heat-exchange unit, prevents scattering and disappearing of heat, and premixed device is arranged on
Connect the top of casing；
Described combustion heat-exchange unit includes anti-backfire structure, combustor 40, afterbody heat exchanger and inlet plenum 2, described air inlet
The side wall surface of room 2 is welded with two premixed gas inlet tubes 1；Described anti-backfire structure is by anti-backfire hydroecium 35 and anti-backfire air inlet
Passage 4 is constituted, and anti-backfire inlet channel 4 is embedded in anti-backfire hydroecium 35 by welding, anti-backfire hydroecium 35 front end and air inlet
Room 2 connects, and connects combustor 40 in anti-backfire hydroecium rear end, and the outlet at combustor 40 is disposed with afterbody heat exchanger, combustor
40 and afterbody heat exchanger be placed in combustor inner 31, by anti-backfire inlet channel 4 UNICOM inlet plenum 2 and combustor 40；
Fine pore porous media material 36 is filled up in anti-backfire inlet channel 4；If being intervally distributed with in the inner shell of described combustor 40
The heat exchange hydroecium 39 of dry quantity, combustor 40 is divided into multiple burning zonule by a number of heat exchange hydroecium 39, each
Heterogeneous porous medium material 34 it is filled with in combustor zonule, at the two ends up and down of each combustor zonule and close
Refractory brick 9 is set at combustor inner；The columns of anti-backfire inlet channel is identical with the quantity of combustor zonule；At combustor
Upstream, and the part being connected with anti-backfire hydroecium leaves space, fixedly mounts igniter electrodes 32 in this space, simultaneously can
Ensure to ignite and enter the premixed gas of combustor zonule；
Anti-backfire hydroecium water inlet pipe 6 and anti-backfire hydroecium outlet pipe 33 it is welded with, on heat exchange hydroecium on anti-backfire hydroecium 35
It is welded with heat exchange hydroecium outlet pipe 8 and heat exchange hydroecium water inlet pipe 21, the closed at both ends of described heat exchange hydroecium water inlet pipe 21, and is provided with
One entrance and a number of outlet, the quantity of outlet is consistent with the quantity of heat exchange hydroecium 39, each outlet UNICOM one respectively
Individual heat exchange hydroecium；Anti-backfire hydroecium outlet pipe 33 is connected with the entrance of heat exchange hydroecium water inlet pipe 21, each combustion heat-exchange unit
The outlet of a number of heat exchange hydroecium is all connected with heat exchange hydroecium outlet pipe 8；
Described afterbody heat exchanger includes afterbody heat exchanger tube 29, afterbody heat exchanger entrance collector 24 and afterbody heat exchanger exit collection
Pipe 10, the two ends of afterbody heat exchanger tube 29 are respectively welded at afterbody heat exchanger entrance collector 24 and afterbody heat exchanger exit collector 10
On, afterbody heat exchanger tube 29 is fixing with the sidewall of combustor inner to be connected；Afterbody heat exchanger exit collector 10 and anti-backfire hydroecium enter
It is connected by connecting water pipe 7 between water pipe 6；
Described connection casing includes a number of connection box side 15, connection roof box 16 and connects box bottom
28, the quantity of described connection box side 15 is consistent with the quantity of combustion heat-exchange unit, a number of connection box side 15,
Connect roof box 16 and connect the cabinet space composition flue gas merging chamber that box bottom 28 is surrounded, each connection box side
15 respectively with the plate-side plate welding of the combustor inner 31 of corresponding combustion heat-exchange unit together, connect roof box 16 and connect
Box bottom 28 welds together with top board and the base plate of the combustor inner of corresponding combustion heat-exchange unit respectively；Connect casing
Bottom be chamfered edge cone structure, connect box bottom 28 center weld have cylindrical shape condensed water merging chamber 27, condensed water converge
Collection is welded with drain pipe 25 and smoke exhaust pipe 26 on room；
Connect box bottom and ring-type boiler inlet collector 22 is set, boiler inlet collector is welded with boiler water inlet pipe
37, boiler inlet collector is evenly distributed with a number of outlet consistent with combustion heat-exchange element number, this outlet
Connect with the afterbody heat exchanger entrance collector 24 of corresponding combustion heat-exchange unit, ring-type boiler inlet collector 22 is installed and fires
Burn a number of water valve 23 that heat exchange unit quantity is consistent, can be according to boiler load demand, it is achieved part combustion heat-exchange list
First is properly functioning；The top connecting casing is provided with ring-type boiler export collector 11, is distributed on boiler export collector 11
Several water inlets consistent with combustion heat-exchange element number and an outlet, this water inlet respectively with corresponding combustion heat-exchange list
The heat exchange hydroecium outlet pipe 8 of unit connects, and the outlet of boiler export collector is welded with hot water outlet pipe 38.
In above-mentioned gas fired-boiler based on multi-hole medium combustion technology, described premixed device is for realizing the mixed of combustion gas and air
Close, including gas nozzle 20, injector 13, air nozzle 19, premixer 14 and premixed gas outlet 17；In premixer 14
Bottom is fixing with the upper surface being connected casing to be connected, and is provided with two injectors 13 on the side at top in premixer 14,
Angle between two injectors 13 is 120 °, is evenly arranged a number of pre-on the side of bottom in premixer 14
Mixed gas outlet tube 17, the quantity of premixed gas outlet 17 is the twice of combustion heat-exchange element number, premixed gas outlet
17 are connected with the premixed gas inlet tube 1 of inlet plenum by premixed gas liaison tube 12, on each premixed gas liaison tube 12 all
Stop valve 18 is installed, it is simple to the workload of regulating gas boiler.
The quantity of described combustion heat-exchange unit is 2-12.
Described heat exchange hydroecium (seeing Fig. 4) be shaped as rectangular structure, heat exchange hydroecium in each combustion heat-exchange unit
Number be 4-20, described heat exchange hydroecium water inlet pipe 21 is a closed at both ends with 1 entrance and 4-20 outlet
Steel pipe.
In described combustor, the cross-sectional width of each burning zonule is 10-30mm, and the degree of depth is 60-500mm.
A diameter of 10-25mm of anti-backfire inlet channel.
The described a diameter of 8-20mm of afterbody heat exchanger tube.
The cross section of described inlet plenum and anti-backfire hydroecium is square or rectangular, and described anti-backfire hydroecium 35 (sees figure
3) the individual anti-backfire inlet channel 4 of embedded (3～19) * (3～45), i.e. has 3-19 to arrange, 3-45 row, and column pitch is 20-70mm, in the ranks
Away from for 30-60mm, a diameter of 10-25mm.
The void density of described fine pore porous media material is 40PPI-60PPI, and porosity is 80%-90%.
The void density of described heterogeneous porous medium material is 10PPI-40PPI, in each combustor zonule,
On airflow direction, void density is non-uniform Distribution, by the rectangle lamellar porous media that 3-20 block thickness is 10-40mm successively
It is formed by stacking.
The size in the space that the part that described combustor upstream is connected with anti-backfire hydroecium leaves is 4-8mm.
In present invention gas fired-boiler based on multi-hole medium combustion technology, the type of flow of water is: boiler water inlet pipe 37 → pot
10 → the connection of stove inlet header 22 → afterbody heat exchanger entrance collector 24 → afterbody heat exchanger tube 29 → afterbody heat exchanger exit collector
Water pipe 7 → anti-backfire hydroecium water inlet pipe 6 → anti-backfire hydroecium 35 → anti-backfire hydroecium outlet pipe 33 → heat exchange hydroecium water inlet pipe 21
→ heat exchange hydroecium 39 → heat exchange hydroecium outlet pipe 8 → boiler export collector 10 → hot water outlet pipe 38.
Afterbody heat exchanger tube 29 in the present invention is made up of 10-80 layer snakelike heat exchange tube, the number of plies of particular-postlude heat exchanger tube with
The size of combustor is relevant, and specifically, gas furnace power is the biggest, and combustor height is the biggest, the afterbody heat exchanger tube that can hold
Quantity is the most more.In combustor, the quantity of heat exchange hydroecium is 4-20, concrete quantitative requirement and single combustion heat-exchange unit
Power relevant, it is little that each combustion heat-exchange unit is divided into several burnings by several heat exchange hydroeciums combustor in the horizontal
Region, the cross-sectional width of each burning zonule requires, generally 10-30mm, and the width of heat exchange hydroecium is 10-40mm,
The combustor that the power of combustion heat-exchange unit the most then needs is big, and the burning zonule number of heat exchange hydroecium segmentation is many, can have 3-
19 burning zonules.The number of the valve opening of water valve 23 is consistent with the number of combustion heat-exchange unit starting, it is to avoid cold water enters
Enter the combustion heat-exchange unit not worked, can be according to boiler load demand, it is achieved part combustion heat-exchange unit properly functioning.
Heretofore described heterogeneous porous medium material 34 and fine pore porous media material 36 can be aluminium oxide, carbon
SiClx or zirconium oxide etc., its tolerance high temperature is up to more than 1000 DEG C.
Embodiment 1
The gas fired-boiler structure based on multi-hole medium combustion technology of the present embodiment and shape are shown in Fig. 1-4.
The present embodiment gas fired-boiler based on multi-hole medium combustion technology includes premixed device, a number of combustion heat-exchange list
Unit and connection casing；Described a number of combustion heat-exchange unit connects by connecting casing, and combustion heat-exchange unit is around connection
Casing is centrosymmetric distribution, connects casing and combustion heat-exchange unit outer wrap has shell 5, shell 5 be connected casing and
Being filled with insulation material 3 between combustion heat-exchange unit, prevent scattering and disappearing of heat, premixed device is arranged on the top connecting casing；
Described combustion heat-exchange unit includes anti-backfire structure, combustor 40, afterbody heat exchanger and inlet plenum 2, described air inlet
The side wall surface of room 2 is welded with two premixed gas inlet tubes 1；Described anti-backfire structure is by anti-backfire hydroecium 35 and anti-backfire air inlet
Passage 4 is constituted, and anti-backfire inlet channel 4 is embedded in anti-backfire hydroecium 35 by welding, anti-backfire hydroecium 35 front end and air inlet
Room 2 connects, and connects combustor 40 in anti-backfire hydroecium rear end, and the outlet at combustor 40 is disposed with afterbody heat exchanger, combustor
40 and afterbody heat exchanger be placed in combustor inner 31, by anti-backfire inlet channel 4 UNICOM inlet plenum 2 and combustor 40；
Fine pore porous media material 36 is filled up in anti-backfire inlet channel 4；If being intervally distributed with in the inner shell of described combustor 40
The heat exchange hydroecium 39 of dry quantity, combustor 40 is divided into multiple burning zonule by a number of heat exchange hydroecium 39, each
Heterogeneous porous medium material 34 it is filled with in combustor zonule, at the two ends up and down of each combustor zonule and close
Refractory brick 9 is set at combustor inner；The columns of anti-backfire inlet channel is identical with the quantity of combustor zonule；At combustor
Upstream, and the part being connected with anti-backfire hydroecium leaves space, fixedly mounts igniter electrodes 32 in this space, simultaneously can
Ensure to ignite and enter the premixed gas of combustor zonule；
Anti-backfire hydroecium water inlet pipe 6 and anti-backfire hydroecium outlet pipe 33 it is welded with, on heat exchange hydroecium on anti-backfire hydroecium 35
It is welded with heat exchange hydroecium outlet pipe 8 and heat exchange hydroecium water inlet pipe 21, the closed at both ends of described heat exchange hydroecium water inlet pipe 21, and is provided with
One entrance and a number of outlet, the quantity of outlet is consistent with the quantity of heat exchange hydroecium 39, each outlet UNICOM one respectively
Individual heat exchange hydroecium；Anti-backfire hydroecium outlet pipe 33 is connected with the entrance of heat exchange hydroecium water inlet pipe 21, each combustion heat-exchange unit
The outlet of a number of heat exchange hydroecium is all connected with heat exchange hydroecium outlet pipe 8；
Described afterbody heat exchanger includes afterbody heat exchanger tube 29, afterbody heat exchanger entrance collector 24 and afterbody heat exchanger exit collection
Pipe 10, the two ends of afterbody heat exchanger tube 29 are respectively welded at afterbody heat exchanger entrance collector 24 and afterbody heat exchanger exit collector 10
On, afterbody heat exchanger tube 29 is fixing with the sidewall of combustor inner to be connected；Afterbody heat exchanger exit collector 10 and anti-backfire hydroecium enter
It is connected by connecting water pipe 7 between water pipe 6；
Described connection casing includes a number of connection box side 15, connection roof box 16 and connects box bottom
28, the quantity of described connection box side 15 is consistent with the quantity of combustion heat-exchange unit, a number of connection box side 15,
Connect roof box 16 and connect the cabinet space composition flue gas merging chamber that box bottom 28 is surrounded, each connection box side
15 respectively with the plate-side plate welding of the combustor inner 31 of corresponding combustion heat-exchange unit together, connect roof box 16 and connect
Box bottom 28 welds together with top board and the base plate of the combustor inner of corresponding combustion heat-exchange unit respectively；Connect casing
Bottom be chamfered edge cone structure, connect box bottom 28 center weld have cylindrical shape condensed water merging chamber 27, condensed water converge
Collection is welded with drain pipe 25 and smoke exhaust pipe 26 on room；
Connect box bottom and ring-type boiler inlet collector 22 is set, boiler inlet collector is welded with boiler water inlet pipe
37, boiler inlet collector is evenly distributed with a number of outlet consistent with combustion heat-exchange element number, this outlet
Connect with the afterbody heat exchanger entrance collector 24 of corresponding combustion heat-exchange unit, ring-type boiler inlet collector 22 is installed and fires
Burn a number of water valve 23 that heat exchange unit quantity is consistent, can be according to boiler load demand, it is achieved part combustion heat-exchange list
First is properly functioning；The top connecting casing is provided with ring-type boiler export collector 11, is distributed on boiler export collector 11
Several water inlets consistent with combustion heat-exchange element number and an outlet, this water inlet respectively with corresponding combustion heat-exchange list
The heat exchange hydroecium outlet pipe 8 of unit connects, and the outlet of boiler export collector is welded with hot water outlet pipe 38.
The gas fired-boiler based on multi-hole medium combustion technology of the present embodiment has 4 combustion heat-exchange unit, each burning
Heat exchange unit has 4 heat exchange hydroeciums 39, surrounds 3 burning zonules, and corresponding has 3 row anti-backfire inlet channels 4.Wherein, change
The size of hot hydroecium 39 is 235*90*30mm, and the height of the burning zonule surrounded is 235mm, and the degree of depth is 90mm, and width is
30mm.A diameter of 16mm of anti-backfire inlet channel 4, column pitch is 60mm, and line space is 47mm.Heterogeneous porous medium material
34 and fine pore porous media material 36 be aluminium oxide.Heat exchange hydroecium water inlet pipe 21 is a closed at both ends and enters with one
Mouthful, 4 outlet steel pipes, the port of export respectively with 4 heat exchange hydroecium 39 UNICOMs.Combustor inner 31 is by 4 pieces of corrosion resistant plates (1 piece
Top board, 1 block of base plate, 2 blocks of side plates) it is welded, the space that the part that combustor upstream is connected with anti-backfire hydroecium leaves big
Little for 8mm.
In the present embodiment, afterbody heat exchanger tube 29 is made up of 12 layers of snakelike heat exchange tube, and every layer of heat exchanger tube two ends are respectively welded at tail
On portion's heat exchanger entrance collector 24 and afterbody heat exchanger exit collector 10, afterbody heat exchanger tube 29 is fixed on by spacer 30 spot welding
On combustor inner 31.
The present embodiment connects casing be welded by 15,1 piece of top board 16 of 4 blocks of side plates and 1 piece of base plate 28, form a case
Body structure, constitutes flue gas merging chamber；Connect the combustor inner 31 side plate weldering of box side 15 and each two combustion heat-exchange unit
Being connected together, described shell 5 is divided into side plate, top board and base plate, is connected by screw is fixing respectively.On described boiler inlet collector 22
It is uniformly distributed 4 outlets, 4 water valves 23 are installed, can be according to boiler load demand, it is achieved part combustion heat-exchange unit is just
Often run.Be disposed with 4 water inlets and an outlet on described boiler export collector 11,4 water inlets respectively with 4 burnings
The heat exchange hydroecium outlet pipe 8 of heat exchange unit connects.
The present embodiment gas fired-boiler based on multi-hole medium combustion technology rated power is 160kW, and boiler thermal output is permissible
Reach 96%-107%.
Embodiment 2
The Each part of the present embodiment gas fired-boiler based on multi-hole medium combustion technology connects with embodiment 1, different
Part is that described premixed device includes gas nozzle 20, injector 13, air nozzle 19, premixer 14 and premixed gas outlet
17；Bottom connection fixing with the upper surface being connected casing in premixer 14, is arranged on the side at top in premixer 14
Having two injectors 13, the angle between two injectors 13 is 120 °, in premixer 14 on the side of bottom uniform cloth
Being equipped with 8 premixed gas outlets 17, premixed gas outlet 17 is by the premix gas of premixed gas liaison tube 12 with inlet plenum
Body inlet tube 1 connects, and each premixed gas liaison tube 12 is mounted on stop valve 18, it is simple to regulation is based on multi-hole medium combustion
The workload of the gas fired-boiler of technology.
Embodiment 3
The Each part of the present embodiment gas fired-boiler based on multi-hole medium combustion technology connects with embodiment 1, different
Part is that the gas fired-boiler based on multi-hole medium combustion technology of the present embodiment has 6 combustion heat-exchange unit, and Fig. 5 is that it connects
Connecing the top cross-sectional view of casing, figure midship section is for connecting box side 15, altogether 6 blocks of side plates, and every block of side plate 15 is with every two
Individual combustion heat-exchange unit connects.
In present invention gas fired-boiler based on multi-hole medium combustion technology, involved raw material, parts and installation thereof
Method is known to the art.
The present invention does not addresses part and is applicable to prior art.
Claims (10)
1. a gas fired-boiler based on multi-hole medium combustion technology, including premixed device, a number of combustion heat-exchange unit and
Connect casing；Described a number of combustion heat-exchange unit connects by connecting casing, and combustion heat-exchange unit is around connecting casing
Be centrosymmetric distribution, and connecting casing and combustion heat-exchange unit outer wrap has shell, shell be connected casing and burning is changed
Being filled with insulation material between hot cell, premixed device is arranged on the top connecting casing；
Described combustion heat-exchange unit includes anti-backfire structure, combustor, afterbody heat exchanger and inlet plenum, the sidewall of described inlet plenum
Face is welded with two premixed gas inlet tubes；Described anti-backfire structure is made up of anti-backfire hydroecium and anti-backfire inlet channel, anti-
Tempering inlet channel is embedded in anti-backfire hydroecium by welding, and anti-backfire hydroecium front end is connected with inlet plenum, at anti-backfire water
Rear end, room connects combustor, and the outlet at combustor is disposed with afterbody heat exchanger, combustor and afterbody heat exchanger and is placed in burning
In indoor shell, by anti-backfire inlet channel UNICOM's inlet plenum and combustor；Fine pore is filled up many in anti-backfire inlet channel
Hole dielectric material；Being intervally distributed with a number of heat exchange hydroecium in the inner shell of described combustor, combustor is by a number of
Heat exchange hydroecium is divided into multiple burning zonule, is filled with heterogeneous porous medium material in each combustor zonule,
The two ends up and down of each combustor zonule, and refractory brick is set at combustor inner；The columns of anti-backfire inlet channel
Identical with the quantity of combustor zonule；In combustor upstream, and the part being connected with anti-backfire hydroecium leaves space, empty at this
Fixed installation igniter electrodes in gap；
It is welded with anti-backfire hydroecium water inlet pipe and anti-backfire hydroecium outlet pipe on anti-backfire hydroecium, heat exchange hydroecium is welded with heat exchange
Hydroecium outlet pipe and heat exchange hydroecium water inlet pipe, the closed at both ends of described heat exchange hydroecium water inlet pipe, and it is provided with an entrance and some
Quantity exports, and the quantity of outlet is consistent with the quantity of heat exchange hydroecium, each outlet one heat exchange hydroecium of UNICOM respectively；Anti-backfire
Hydroecium outlet pipe is connected with the entrance of heat exchange hydroecium water inlet pipe, going out of a number of heat exchange hydroecium of each combustion heat-exchange unit
Mouth is all connected with heat exchange hydroecium outlet pipe；
Described afterbody heat exchanger includes afterbody heat exchanger tube, afterbody heat exchanger entrance collector and afterbody heat exchanger exit collector, afterbody
The two ends of heat exchanger tube are respectively welded on afterbody heat exchanger entrance collector and afterbody heat exchanger exit collector, afterbody heat exchanger tube and combustion
Burn the fixing connection of sidewall of indoor shell；By connecting water pipe phase between afterbody heat exchanger exit collector and anti-backfire hydroecium water inlet pipe
Even；
Described connection casing includes a number of connection box side, connection roof box and connects box bottom, described company
The quantity connecing box side is consistent with the quantity of combustion heat-exchange unit, a number of connection box side, connects roof box
The cabinet space surrounded with connection box bottom constitutes flue gas merging chamber, and each connection box side burns with corresponding respectively
The plate-side plate welding of the combustor inner of heat exchange unit together, connects roof box and connection box bottom fires with corresponding respectively
The top board and the base plate that burn the combustor inner of heat exchange unit weld together；The bottom connecting casing is chamfered edge cone structure, even
Connect box bottom center weld and have the condensed water merging chamber of cylindrical shape, condensed water merging chamber is welded with drain pipe and smoke exhaust pipe；
Connecting box bottom and arrange ring-type boiler inlet collector, boiler inlet collector is welded with boiler water inlet pipe, boiler enters
Being provided with a number of outlet consistent with combustion heat-exchange element number on mouth collector, this outlet changes with corresponding burning
The afterbody heat exchanger entrance collector of hot cell connects, and ring-type boiler inlet collector is installed consistent with combustion heat-exchange element number
A number of water valve；The top connecting casing is provided with ring-type boiler export collector, and boiler export collector is provided with
Several water inlets consistent with combustion heat-exchange element number and an outlet, this water inlet respectively with corresponding combustion heat-exchange list
The heat exchange hydroecium outlet pipe of unit connects, and the outlet of boiler water outlet collector is welded with hot water outlet pipe.
Gas fired-boiler based on multi-hole medium combustion technology the most according to claim 1, it is characterised in that described premixed device
Including gas nozzle, injector, air nozzle, premixer and premixed gas outlet；Premixer bottom be connected casing
Upper surface fixing connect, on the side at top, be provided with two injectors, the folder between two injectors in premixer
Angle is 120 °, is evenly arranged a number of premixed gas outlet, premixed gas on the side of bottom in premixer
The quantity of outlet is the twice of combustion heat-exchange element number, and premixed gas outlet passes through premixed gas liaison tube and inlet plenum
Premixed gas inlet tube connect, each premixed gas liaison tube is mounted on stop valve.
Gas fired-boiler based on multi-hole medium combustion technology the most according to claim 1, it is characterised in that described burning is changed
The quantity of hot cell is 2-12.
Gas fired-boiler based on multi-hole medium combustion technology the most according to claim 1, it is characterised in that described heat-exchanging water
Room be shaped as rectangular structure, in each combustion heat-exchange unit, the number of heat exchange hydroecium is 4-20.
Gas fired-boiler based on multi-hole medium combustion technology the most according to claim 1, it is characterised in that described combustor
The cross-sectional width of interior each burning zonule is 10-30mm, and the degree of depth is 60-500mm.
Gas fired-boiler based on multi-hole medium combustion technology the most according to claim 1, it is characterised in that anti-backfire air inlet
A diameter of 10-25mm of passage.
Gas fired-boiler based on multi-hole medium combustion technology the most according to claim 1, it is characterised in that described afterbody changes
The a diameter of 8-20mm of heat pipe.
Gas fired-boiler based on multi-hole medium combustion technology the most according to claim 1, it is characterised in that described inlet plenum
It is square or rectangular with the cross section of anti-backfire hydroecium.
9. according to the arbitrary described gas fired-boiler based on multi-hole medium combustion technology of claim 1-8, it is characterised in that described
The void density of fine pore porous media material is 40PPI-60PPI, and porosity is 80%-90%.
10. according to the arbitrary described gas fired-boiler based on multi-hole medium combustion technology of claim 1-8, it is characterised in that described
The void density of heterogeneous porous medium material is 10PPI-40PPI, in each combustor zonule, and hole in the direction of the air flow
Gap density is non-uniform Distribution, the rectangle lamellar porous media that 3-20 block thickness is 10-40mm be sequentially overlapped and form.
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| CN201610807386.6A CN106288370B (en) | 2016-09-07 | 2016-09-07 | Gas boiler based on porous medium combustion technology |
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| CN201610807386.6A CN106288370B (en) | 2016-09-07 | 2016-09-07 | Gas boiler based on porous medium combustion technology |
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| CN106288370B CN106288370B (en) | 2021-09-24 |
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| CN106288370B (en) | 2021-09-24 |
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