CN107806632A - A kind of flue gas recirculation gas fired-boiler - Google Patents
A kind of flue gas recirculation gas fired-boiler Download PDFInfo
- Publication number
- CN107806632A CN107806632A CN201711328899.XA CN201711328899A CN107806632A CN 107806632 A CN107806632 A CN 107806632A CN 201711328899 A CN201711328899 A CN 201711328899A CN 107806632 A CN107806632 A CN 107806632A
- Authority
- CN
- China
- Prior art keywords
- flue
- boiler
- smoke box
- flue gas
- gas recirculation
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/08—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2202/00—Fluegas recirculation
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
A kind of flue gas recirculation gas fired-boiler, including shell, flue, combustor interface, burner, the flue is front and rear to set front smoke box and rear smoke box, the anterior connection combustor interface of the flue, the flue rear portion connect return combustion chamber, smoke pipe are threaded between the return combustion chamber and the front smoke box, the front smoke box sets outlet flue, is connected between the outlet flue and the burner by flue gas recirculation pipe.The part of smoke of heated surface at the end of boiler lower temperature is sent into burner hearth 2 by the present invention by recirculation blower, so as to play a part of changing the combustion conditions and heat-transfer character of boiler.
Description
Technical field
The present invention relates to a kind of gas fired-boiler, more particularly to a kind of flue gas recirculation gas fired-boiler.
Background technology
To increase prevention and cure of air pollution dynamics, Optimization of Energy Structure, effectively improve clean energy resource and utilize ratio, country is energetically
Promote application of the industrial combustion gas boiler in heating, industrial production.For coal-burning boiler, the particulate matter of gas fired-boiler and
SO2Discharge capacity is greatly decreased, and effectively reduces environmental pollution rate, but still suffer from the problems such as nitrogen oxide emission is exceeded.Combustion
The nitrogen oxides main component of steam stove discharge is NO, and has a small amount of NO2, in addition to except pollution environment itself and being detrimental to health,
Can also generate nitric acid mist and nitrate by a series of physical-chemical reaction in an atmosphere, and can under light illumination with nytron
Thing, ozone etc. generate photochemical fog, so as to produce bigger influence to atmospheric environment.As can be seen here, low NOx combustion skill is developed
Place of the art with limitation NOx emission to environmental protection, the meaning of air conservation.NOx in industrial production largely comes from
In high-temperature heating process, therefore study a kind of stop for reducing ignition temperature, dilution oxygen concentration and reduction flue gas in high-temperature region
The technology of time has turned into current imperative problem.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of flue gas recirculation gas fired-boiler.
The technical solution adopted by the present invention is：A kind of flue gas recirculation gas fired-boiler, including shell, flue, combustor connect
Mouthful, burner, the flue is front and rear to set front smoke box and rear smoke box, the anterior connection combustor interface of the flue, the flue
Rear portion connects return combustion chamber, and smoke pipe is threaded between the return combustion chamber and the front smoke box, and the front smoke box sets outlet flue, institute
State and connected between outlet flue and the burner by flue gas recirculation pipe.
A kind of described flue gas recirculation gas fired-boiler, it is characterized in that：The outlet flue be sequentially connected first-stage condenser and
Secondary condenser, the first-stage condenser, secondary condenser are arranged above shell.
A kind of described flue gas recirculation gas fired-boiler, it is characterized in that：The flue is corrugated internal furnace.
A kind of described flue gas recirculation gas fired-boiler, it is characterized in that：Smoke box is enclosed construction after described.
The part of smoke of heated surface at the end of boiler lower temperature is sent into burner hearth 2 by the present invention by recirculation blower, from
And play a part of changing the combustion conditions and heat-transfer character of boiler.When flue gas recycled is sent directly into burner hearth 2 from burner
During portion, due to flue gas recycled temperature compared with fire box temperature it is much lower（General fire box temperature is at 2000 DEG C or so, and again
Circulating flue gas temperature is 250 DEG C~350 DEG C）, the temperature levels in burner hearth can be significantly reduced；Secondly because tail flue gas is combustion
Expect the gas after burning and the mixture to leak out on a small quantity, oxygen content is low, and flue gas recycled effectively reduces stove after entering burner hearth
Oxygen concentration in thorax.Therefore flue gas recirculating technique further reduces oxygen concentration while fire box temperature is reduced, can
Effectively to suppress the formation of NOx in combustion process, the pollution to air is reduced.For gas fired-boiler, NOx discharge
20%~70% can be reduced, minimum reachable 30mg/m3, the exhaust gas temperature of boiler is reduced to less than 60 DEG C, the thermal efficiency of boiler carries
It is high by more than 98%, so as to reach efficient, energy-saving and environmental protection purposes.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
In figure：1- shells, 2- flues, 3- combustor interfaces, 4- burners, 5- front smoke boxs, 6- outlet flues, 7- flue gas recirculations
Manage, 8- first-stage condensers, 9- secondary condensers, 10- return combustion chambers, smoke box after 11-, 12- manholes, 13- stay bolt bars, 14- screw threads
Smoke pipe.
Embodiment
As shown in figure 1, a kind of condensation integrated gas boiler, including furnace shell 1, furnace shell sets gradually front smoke box from front to back
5, flue 2, return combustion chamber 10, rear smoke box 11, flue side is threaded smoke pipe 14, shell front end setting burner 4 and combustor
Interface 3, combustor interface 3 connect flue 2, and shell rear end sets manhole 12 to connect return combustion chamber 10, and the rearward end of flue 2 is with strile-bacing
Room 10 is connected, and return combustion chamber 10 is connected with front smoke box 5 by threaded flue 14, setting outlet flue 6 at the top of shell, first-stage condenser 8,
Secondary condenser 9, outlet flue 6 connect front smoke box, first-stage condenser 8, secondary condenser 9, outlet flue 6 are sequentially connected after outlet flue
Connected between burner 4 by flue gas recirculation pipe 7, stay bolt bar 13, rear smoke box 9 are set between return combustion chamber 10 and rear smoke box 11
For enclosed construction.
Burner is sprayed into flue by combustor interface to burn, and flue gas caused by burning enters screw thread by return combustion chamber 10
Smoke pipe 14, front smoke box 5 is entered after threaded flue heat convection, it is cold into first order condenser 8, the second level by outlet flue 6
Condenser 9 is discharged into air.Water heat convection of the flue gas in I and II condenser and finned tube, heat in flue gas is made full use of,
It not only make use of the latent heat of obvious heat of smoke also flue gas also to make full use of, greatly reduce the exhaust gas temperature of boiler, improve boiler
The thermal efficiency.The rear smoke box 9 of boiler is enclosed construction, and smokeless is by greatly reducing the radiation loss of rear smoke box, so as to carry
The high thermal efficiency of boiler.For the low-temperature flue gas of front smoke box by outlet flue, flue gas recirculation pipe 7 is sent into burner, then again by
Burner is sent into burner hearth, so as to not only reduce temperature levels in burner hearth, and after being fuel combustion due to tail flue gas
Gas and the mixture to leak out on a small quantity, oxygen content is low, and flue gas recycled effectively reduces oxygen in burner hearth after entering burner hearth
Concentration, therefore flue gas recirculating technique further reduces oxygen concentration while fire box temperature is reduced, and can effectively suppress
NOx formation in combustion process, reduces the pollution to air.Smoke pipe uses threaded flue, enhances the disturbance of flue gas itself, carries
The high heat-exchange time and the coefficient of heat transfer of flue gas, improves the thermal efficiency of boiler.Flue space is big, Net long wave radiation heating surface area
Greatly, the heating surface area of boiler is made to be optimised utilization；Gas stream in the stove even tissue, and because high-speed flame is inhaled to the volume of backflow
Effect, reduces the temperature levels of flame region, effectively inhibits NOx generation, simultaneously because the action of turbulent flow of backflow, increase
The heat convection of air-flow and wall, smoke pipe are single backhaul, effectively reduce the flue gas resistance of body.Structure and manufacturing process letter
List, characteristics of compact layout, maintenance cost are low.First, two condensers are arranged in the top of boiler, with boiler body whole Transporting, subtract significantly
Lack the installation procedure at scene, save boiler room space.
Claims (4)
1. a kind of flue gas recirculation gas fired-boiler, including shell（1）, flue（2）, combustor interface（3）, burner（4）, it is special
Sign is：Front smoke box is set respectively before and after the flue（5）With rear smoke box（11）, the anterior connection combustor interface of the flue（3）,
The flue rear portion connects return combustion chamber（10）, smoke pipe is threaded between the return combustion chamber and the front smoke box（14）, before described
Smoke box sets outlet flue（6）, pass through flue gas recirculation pipe between the outlet flue and the burner（7）Connection.
2. a kind of flue gas recirculation gas fired-boiler according to claim 1, it is characterized in that：The outlet flue is sequentially connected one
Level condenser（8）And secondary condenser（9）, the first-stage condenser, secondary condenser are arranged above shell.
3. a kind of flue gas recirculation gas fired-boiler according to claim 1 or 2, it is characterized in that：The flue is ripple stove
Courage.
4. a kind of flue gas recirculation gas fired-boiler according to claim 1 or 2, it is characterized in that：Smoke box is closing after described
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711328899.XA CN107806632A (en) | 2017-12-13 | 2017-12-13 | A kind of flue gas recirculation gas fired-boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711328899.XA CN107806632A (en) | 2017-12-13 | 2017-12-13 | A kind of flue gas recirculation gas fired-boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107806632A true CN107806632A (en) | 2018-03-16 |
Family
ID=61580105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711328899.XA Pending CN107806632A (en) | 2017-12-13 | 2017-12-13 | A kind of flue gas recirculation gas fired-boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107806632A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945170A (en) * | 2019-04-26 | 2019-06-28 | 平顶山市百阳丰机械制造有限公司 | A kind of fire grate type gas fired-boiler |
| CN110529840A (en) * | 2019-08-22 | 2019-12-03 | 嘉兴市建超智能科技有限公司 | A kind of gas fired-boiler ontology |
| CN111156493A (en) * | 2020-03-11 | 2020-05-15 | 方快锅炉有限公司 | Quick start pot shell boiler |
| CN111425854A (en) * | 2019-11-13 | 2020-07-17 | 北京华通兴远供热节能技术有限公司 | Gas boiler |
| CN118009308A (en) * | 2024-04-10 | 2024-05-10 | 山西吉祥锅炉制造有限公司 | Boiler flue gas recirculation device |
-
2017
- 2017-12-13 CN CN201711328899.XA patent/CN107806632A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945170A (en) * | 2019-04-26 | 2019-06-28 | 平顶山市百阳丰机械制造有限公司 | A kind of fire grate type gas fired-boiler |
| CN110529840A (en) * | 2019-08-22 | 2019-12-03 | 嘉兴市建超智能科技有限公司 | A kind of gas fired-boiler ontology |
| CN111425854A (en) * | 2019-11-13 | 2020-07-17 | 北京华通兴远供热节能技术有限公司 | Gas boiler |
| CN111156493A (en) * | 2020-03-11 | 2020-05-15 | 方快锅炉有限公司 | Quick start pot shell boiler |
| CN118009308A (en) * | 2024-04-10 | 2024-05-10 | 山西吉祥锅炉制造有限公司 | Boiler flue gas recirculation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180316 |
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| WD01 | Invention patent application deemed withdrawn after publication |