CN209782602U - Built-in flue gas recirculation horizontal boiler - Google Patents
Built-in flue gas recirculation horizontal boiler Download PDFInfo
- Publication number
- CN209782602U CN209782602U CN201821607835.3U CN201821607835U CN209782602U CN 209782602 U CN209782602 U CN 209782602U CN 201821607835 U CN201821607835 U CN 201821607835U CN 209782602 U CN209782602 U CN 209782602U
- Authority
- CN
- China
- Prior art keywords
- air
- outlet
- boiler
- flue gas
- flue
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The built-in flue gas recirculation horizontal boiler comprises a horizontal boiler body, a burner, an economizer, an air preheater, a wind mixing box, a recirculation fan, an outlet flue, a chimney, a blower and a hot air duct; a combustion chamber is arranged in the furnace body, a combustor is arranged on the combustion chamber, and the furnace body is connected with a plurality of smoke pipes through the combustion chamber; the front part of the furnace body is provided with a smoke box, the top of the furnace body at the upper part of the smoke box is provided with an energy saver, the outlet of the smoke box is connected with the smoke inlet of the energy saver, the smoke outlet of the energy saver is connected with the smoke inlet of the air preheater, and the smoke outlet at the rear part of the air preheater enters an outlet flue; the smoke outlet of the energy saver is connected with an outlet flue, and the outlet flue is connected to a chimney; the air outlet of the air blower is connected with the air inlet of the air preheater, and the air outlet of the air preheater is connected with the recirculation pipeline of the outlet flue at the air mixing box; a recirculation fan is arranged between the outlet flue and the air mixing box; the hot air channel and an air inlet leading to the lower part of the burner at the front part of the furnace from the back of the inner side of the outer package of the furnace body enter the burner.
Description
Technical Field
The utility model relates to an industrial boiler is a horizontal internal combustion steam or hydrothermal generating device, in particular to gas boiler.
Background
With increasing environmental requirements, the legally permitted boiler pollutant emissions are becoming more stringent. Compared with other fuels, the emission of sulfur dioxide and particulate matters of the common gas-fired boiler is obviously reduced, but the content of nitrogen oxides in flue gas after combustion is higher. In the standard of emission of atmospheric pollutants in Beijing, Shanghai and the like, the allowable emission of NOx must be controlled below 30 mg. The emission of boiler nitrogen oxides is reduced by extracting part of boiler exhaust smoke from the boiler, and the mode is more commonly used in low-nitrogen combustion.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a horizontal boiler with a built-in flue gas recirculation pipe. Through the optimization to the flue gas wind flow, on the basis of make full use of boiler heat, utilize and discharge fume to carry out the heating before advancing the boiler to combustion air, finally realize the low nitrogen emission of gas boiler flue gas and reduce the energy-concerving and environment-protective dual purpose of boiler exhaust gas temperature. The utility model discloses can make boiler area little simultaneously, be convenient for transportation and installation.
The technical scheme of the utility model is that: a horizontal boiler with a built-in flue gas recirculation pipe comprises a horizontal boiler body 1, a burner 2, an energy saver 3, an air preheater 4, an air mixing box 5, a recirculation fan 6, an outlet flue 7, a chimney 8, a blower 9 and a (built-in) hot air duct 10; the furnace body is internally provided with a combustion chamber, the combustion chamber is provided with a burner, and the furnace body is connected with a plurality of smoke pipes through the combustion chamber. The front part of the furnace body is provided with a smoke box, the top of the furnace body at the upper part of the smoke box is provided with an energy saver, the outlet of the smoke box is connected with the smoke inlet of the energy saver, the smoke outlet of the energy saver is connected with the smoke inlet of the air preheater, and the smoke outlet at the rear part of the air preheater 4 enters an outlet flue; the smoke outlet of the energy saver is connected with an outlet flue, and the outlet flue is connected to a chimney; the air outlet of the air blower is connected with the air inlet of the air preheater, and the air outlet of the air preheater is connected with the recirculation pipeline of the outlet flue at the air mixing box; a recirculation fan is arranged between the outlet flue and the air mixing box; the air mixing box is connected with a hot air channel, and the hot air channel and an air inlet leading to the lower part of the burner at the front part of the furnace from the back of the inner side of the outer package of the furnace body enter the burner.
The water supply outlet of the water supply pump enters a water flow channel of an energy saver arranged at the top of the horizontal boiler, and the outlet of the water flow channel is boiler water inlet. The soft water enters the energy saver arranged at the top of the horizontal boiler through the feed pump to exchange heat, the feed water temperature is improved, the smoke temperature is reduced, and the rotating speed of the feed pump can control the boiler to feed water.
The outlet of the blower enters an air preheater arranged at the top of the horizontal boiler for heat exchange. Air required by combustion enters an air preheater arranged at the top of the horizontal boiler through an air blower for heat exchange, so that the air inlet temperature is improved, the combustion efficiency is improved, and the smoke exhaust temperature is further reduced.
And a recirculation pipe connected in parallel is arranged on an outlet flue behind the flue gas at the outlet of the air preheater and in front of the chimney to mix with the combustion air at the outlet of the air blower. And part of the extracted flue gas is mixed with combustion air through a recirculation pipe and then participates in combustion.
The recirculation fan is positioned between the outlet flue and the air mixing box and is fixed on the furnace body 1. The hot air duct 10 is located on the side of the furnace body 1, as shown in fig. 2, and is led to the lower side of the burner in front of the furnace from the rear upper part of the furnace body 1, and the hot air duct is located in the outer package of the furnace body 1. The side of the furnace body is provided with an access door hole.
The water feeding pump adopts a variable frequency motor, and the rotating speed can control the boiler water feeding.
The combustor 2 is arranged in the horizontal boiler body 1 (for combustion), flue gas after heat exchange with water enters the economizer 3 integrally arranged at the top of the boiler, and boiler feed water enters a water inlet of the boiler body 1 after being heated by the heat of the flue gas; the flue gas from the outlet of the economizer enters an air preheater 4 which is also integrally arranged at the top of the boiler, and the flue gas is discharged from the rear part of the air preheater 4 after heat exchange, enters an outlet flue 7 and then enters a chimney for emission.
The cold air enters an air inlet at the top of the air preheater 4 through a blower, and the cold air enters the air mixing box from an air outlet at the lower part after being heated in the air preheater 4. A part of flue gas is extracted from an outlet flue 7 between the air preheater 4 and a chimney to be used as recirculated flue gas, and passes through a built-in hot air duct 10 which is integrally arranged between the boiler body 1 and the boiler body, and the hot air duct 10 leads to an air inlet at the lower part of a burner in front of the boiler and enters the burner to participate in combustion. A recirculation fan is arranged between the outlet flue and the air mixing box. The air mixing box is connected with a hot air channel, and the hot air channel is led to an air inlet at the lower part of the furnace front burner from the rear side of the inner side of the outer package of the furnace body. Through recycling of part of exhaust smoke and preheating of combustion air, the dual purposes of environmental protection of low-nitrogen emission of the gas-fired boiler and energy conservation of reducing the exhaust smoke temperature of the boiler are finally achieved.
The utility model relates to an integrated horizontal boiler structure which is internally arranged in a horizontal boiler and achieves low-nitrogen emission by the mixed combustion of flue gas recirculation and air required by combustion in the outer package of a boiler body. The flue gas passes through the anterior smoke box of furnace body, upwards gets into the economizer flue gas inlet that is located the furnace body top, and the exhanst gas outlet and the air heater of economizer enter the mouth and link to each other, and the outlet flue of economizer links to each other with the export flue, and the export flue is connected to the chimney. And the air outlet of the air blower is connected with the air inlet of the air preheater, and the air outlet is connected with the recirculation pipeline of the outlet flue at the air mixing box. A recirculation fan is arranged between the outlet flue and the air mixing box. The air mixing box is connected with a hot air channel, and the hot air channel and an air inlet leading to the lower part of the furnace front burner from the back of the inner side of the outer package of the furnace body enter the burner.
The utility model discloses can be according to boiler load control air-blower amount of wind size, the size of the recirculated flue gas volume that accessible nitrogen oxide's setting value control got into the case 5 that mixes wind to the size of flue gas volume in the control recirculation pipe.
Has the advantages that: the utility model discloses built-in flue gas recirculation pipe horizontal boiler embeds the flue gas recirculation in horizontal boiler furnace body outsourcing and burns the required air hybrid combustion and reach the integration boiler structure of low nitrogen emission. Through the optimization to the flue gas wind flow, on the basis of make full use of boiler heat, utilize and discharge fume to carry out the heating before advancing the boiler to combustion air, realize the low nitrogen emission of gas boiler flue gas and reduce the energy-concerving and environment-protective dual purpose of boiler exhaust gas temperature. And the volume is not increased, and the occupied area is small. The air mixing box is connected with a hot air channel, and the hot air channel is led to an air inlet at the lower part of the furnace front burner from the rear side of the inner side of the outer package of the furnace body. Through recirculation of part of the exhaust fumes and preheating of the combustion air.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
3 fig. 3 2 3 is 3 a 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 1 3. 3
Fig. 3 is a flow chart of the smoke and air system of the present invention. Wherein the dashed frame is an integrally arranged two-return horizontal boiler body.
Wherein, 1 horizontal boiler body, 2 combustors, 3 energy-saving appliances, 4 air preheaters, 5 air mixing boxes, 6 recirculation fans, 7 outlet flues, 8 chimneys, 9 blowers and 10 hot air ducts. Note: the integral boiler is integrated in the dotted line frame.
Detailed Description
As shown in figure 1, the boiler is an integrated boiler structure which is internally arranged in the outsourcing of a horizontal boiler body and achieves low nitrogen emission by mixing and burning flue gas recirculation and air required by combustion. Comprises a furnace body, a combustion chamber is arranged in the furnace body, a burner is arranged on the combustion chamber, and the furnace body is connected with a plurality of smoke pipes through the combustion chamber. Flue gas upwards enters a flue gas inlet of an energy saver 3 positioned at the top of the furnace body through a smoke box at the front part of the furnace body, a flue gas outlet of the energy saver 3 is connected with a flue gas inlet of an air preheater 4, a flue gas outlet of the energy saver 3 is connected with an outlet flue 7, and the outlet flue 7 is connected to a chimney 8. And an air outlet of the air blower 9 is connected with an air inlet of the air preheater 4, and an air outlet is connected with a recirculation pipeline of the outlet flue 7 at the air mixing box 5. A recirculation fan 6 is arranged between the outlet flue 7 and the air mixing box 5. The air mixing box 5 is connected with a hot air duct 10, and the hot air duct 10 is led to the lower air inlet of the burner in front of the furnace from the side rear inside the outer package of the furnace body 1.
The soft water is connected with the water inlet of the energy saver 3 at the top of the furnace body through a water supply pump, and the water outlet of the energy saver is connected with the water inlet of the furnace body 1.
When the boiler works, the fuel gas is mixed with oxygen-containing air from the blower 9, high-temperature flue gas is formed in the combustion chamber of the boiler body 1, and the high-temperature flue gas exchanges heat with water in the boiler shell. The flue gas exchanges heat through an economizer 3 and an air preheater 4 which are positioned at the top of the boiler, the temperature of the flue gas is reduced to 85 ℃ after the heat exchange of the flue gas by the air preheater, and part of the flue gas is mixed with hot air which exchanges heat through the air preheater 4 in an air mixing box 5 through a recirculation fan 6 and enters a combustor for combustion through a hot air duct 10.
The soft water enters the economizer 3 for heat exchange through the water feeding pump, the water feeding temperature is improved, the smoke temperature is reduced, and the rotating speed of the water feeding pump can control the boiler to feed water.
The air required by combustion enters the air preheater for heat exchange through the air blower 9, the air inlet temperature is improved, the combustion efficiency is improved, and the smoke exhaust temperature is further reduced.
The recycling fan is positioned on the furnace body 1, the air volume of the fan can be controlled according to the load of the boiler, and the volume of the recycled flue gas entering the air mixing box 5 can be controlled through the set value of the nitrogen oxide, so that the volume of the flue gas in the recycling pipe can be controlled.
The hot air duct 10 is located on the side of the furnace body 1, as shown in fig. 2, and is led to the lower side of the burner in front of the furnace from the rear upper part of the furnace body 1, and the hot air duct is wrapped by the outer package of the furnace body 1. The side of the furnace body is provided with an access door hole.
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and transformations for some technical features without creative labor according to the disclosed technical contents, and these substitutions and transformations are all within the protection scope of the present invention.
Claims (8)
1. A built-in flue gas recirculation horizontal boiler is characterized by comprising a horizontal boiler body, a burner, an economizer, an air preheater, a wind mixing box, a recirculation fan, an outlet flue, a chimney, a blower and a hot air duct; a combustion chamber is arranged in the furnace body, a combustor is arranged on the combustion chamber, and the furnace body is connected with a plurality of smoke pipes through the combustion chamber; the front part of the furnace body is provided with a smoke box, the top of the furnace body at the upper part of the smoke box is provided with an energy saver, the outlet of the smoke box is connected with the smoke inlet of the energy saver, and the air outlet at the rear part of the air preheater enters an outlet flue; the smoke outlet of the energy saver is connected with an outlet flue through an air preheater, and the outlet flue is connected to a chimney; the air outlet of the air blower is connected with the air inlet of the air preheater, and the air outlet of the air preheater is connected with the recirculation pipeline of the outlet flue at the air mixing box; a recirculation fan is arranged between the outlet flue and the air mixing box; the air mixing box is connected with a hot air channel, and the hot air channel and an air inlet leading to the lower part of the burner at the front part of the furnace from the back of the inner side of the outer package of the furnace body enter the burner.
2. The horizontal boiler with built-in flue gas recirculation according to claim 1, wherein a feed water pump is provided, a feed water outlet of the feed water pump enters a water flow channel of an economizer arranged at the top of the horizontal boiler, and an outlet of the water flow channel is boiler feed water.
3. The horizontal boiler with built-in flue gas recirculation according to claim 1, wherein the outlet of the blower enters an air preheater disposed at the top of the horizontal boiler for heat exchange.
4. The horizontal boiler with built-in flue gas recirculation according to claim 3, wherein a recirculation pipe connected in parallel is provided on the outlet flue after the flue gas at the outlet of the air preheater and before the chimney to mix with the combustion air at the outlet of the blower.
5. The horizontal boiler with built-in flue gas recirculation according to claim 1, wherein the recirculation fan is positioned between the outlet flue and the air mixing box and fixed on the boiler body.
6. The horizontal boiler with built-in flue gas recirculation according to claim 1, wherein the hot air duct is located on the side of the boiler body and leads from the rear upper part of the boiler body to the lower side of the front burner, and the hot air duct is located in the outer package of the boiler body.
7. The horizontal boiler with built-in flue gas recirculation according to claim 1, wherein the side of the boiler body is provided with access door holes.
8. The horizontal boiler with built-in flue gas recirculation according to claim 1, wherein the feed water pump is a variable frequency motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821607835.3U CN209782602U (en) | 2018-09-30 | 2018-09-30 | Built-in flue gas recirculation horizontal boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821607835.3U CN209782602U (en) | 2018-09-30 | 2018-09-30 | Built-in flue gas recirculation horizontal boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209782602U true CN209782602U (en) | 2019-12-13 |
Family
ID=68786706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821607835.3U Active CN209782602U (en) | 2018-09-30 | 2018-09-30 | Built-in flue gas recirculation horizontal boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209782602U (en) |
-
2018
- 2018-09-30 CN CN201821607835.3U patent/CN209782602U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105841143A (en) | System and method for reducing NOx emissions through smoke recycling | |
| CN204042867U (en) | A kind of low-NO_x burner system | |
| CN107461736A (en) | A kind of gas industry boiler smoke recycling denitration and air preheating system | |
| CN107860011B (en) | Carbon black tail gas incineration boiler with carbon black drying waste gas treatment function | |
| CN209782602U (en) | Built-in flue gas recirculation horizontal boiler | |
| CN217382950U (en) | Waste incineration system | |
| CN208038322U (en) | A kind of lime shaft kiln cooling air cyclic utilization system | |
| CN206648040U (en) | A kind of waste incineration secondary air duct system | |
| CN201563591U (en) | Negative-pressure reverse-gasification side-discharging coal-fired baking furnace | |
| CN205372526U (en) | Biomass combustion furnace flue gas circulation system | |
| CN207214029U (en) | A kind of gas industry boiler smoke recycling denitration and air preheating system | |
| CN209840076U (en) | Flue gas extrinsic cycle formula NOX reduces discharging structure | |
| CN209147148U (en) | Counter-combustion coal stove and its device for reducing tar generation | |
| CN209147149U (en) | Counter-combustion coal stove and its secondary air-distributing device | |
| CN203628695U (en) | Gas inlet system of biomass half-gasification boiler | |
| CN106090892A (en) | A kind of intelligent circulation combustion method of coal-burning boiler | |
| CN208418705U (en) | A kind of pyrolysis installation | |
| CN204986978U (en) | Energy -concerving and environment -protective fuel -fired furnace | |
| CN201339977Y (en) | Household gas oven with function of flue gas recirculation | |
| CN206112909U (en) | Metal surface combustion system | |
| CN205939204U (en) | High -efficient low emission boiler gas recirculation device | |
| CN215446431U (en) | Novel split type smoke re-flowing low-nitrogen combustor | |
| CN211876023U (en) | Low-nitrogen combustor and low-nitrogen combustion system | |
| CN203549794U (en) | Gas furnace | |
| CN211372747U (en) | Intelligent energy-saving environment-friendly small-sized hot water boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |