CN101338904A - Low grade fuel single prewarming and thermal storage type condensation energy-saving boiler - Google Patents
Low grade fuel single prewarming and thermal storage type condensation energy-saving boiler Download PDFInfo
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- CN101338904A CN101338904A CNA2007101184500A CN200710118450A CN101338904A CN 101338904 A CN101338904 A CN 101338904A CN A2007101184500 A CNA2007101184500 A CN A2007101184500A CN 200710118450 A CN200710118450 A CN 200710118450A CN 101338904 A CN101338904 A CN 101338904A
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- burner
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- prewarming
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- 239000000446 fuel Substances 0.000 title claims abstract description 36
- 238000009833 condensation Methods 0.000 title claims abstract description 34
- 230000005494 condensation Effects 0.000 title claims abstract description 34
- 238000012802 pre-warming Methods 0.000 title claims description 18
- 238000002485 combustion reaction Methods 0.000 claims abstract description 68
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 36
- 239000003546 flue gas Substances 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 abstract description 5
- 239000002918 waste heat Substances 0.000 abstract description 5
- 239000007789 gas Substances 0.000 abstract description 4
- 239000003517 fume Substances 0.000 abstract 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 238000013022 venting Methods 0.000 abstract 1
- 206010020843 Hyperthermia Diseases 0.000 description 3
- 230000036031 hyperthermia Effects 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
-
- 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
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Abstract
The invention discloses a single preheating and heat accumulating condensation energy-saving boiler using low-calorie fuels, comprising a furnace body. Two or more burners are arranged on the furnace body; a high-temperature combustion-air inlet and a fuel inlet are arranged on each burner; the high-temperature combustion-air inlet is connected with a regenerator; the regenerator is connected with a constant-temperature combustion-air inlet and a low-temperature fume outlet; a switching-over unit is arranged between the constant-temperature combustion-air inlet and the low-temperature fume outlet; and the low-temperature fume outlet is connected with a condensation heat recoverer. Firstly, during smoke venting, the heat-energy loss is reduced and the combustion efficiency is improved by two stages of waste-heat recovery through the regenerator and the condensation heat recoveror; secondly, the constant-temperature combustion-air participates in the combustion-supporting after being preheated by the regenerator, and as a result, the combustion temperature is increased; thirdly, a plurality of burners adopt periodical switching-over combustion, thereby, local high-temperature area inside the combustion chamber is avoided, the distribution of temperature in the combustion chamber is more even, and the service life of the furnace chamber is prolonged. The invention is applicable to various gas boilers.
Description
Technical field
The present invention relates to a kind of hot water or steam raising plant, relate in particular to a kind of boiler.
Background technology
Boiler is hot water or the steam raising plant of using always, but the general efficiency of combustion of existing boiler is on the low side, and the burning cost is higher.
As shown in Figure 1, be the structure principle chart of a kind of boiler of the prior art, the inside of body of heater constitutes the combustion chamber, on the wall of a side of body of heater burner is housed; Have hot flue gas passing away on the wall of opposite side.After normal temperature combustion air and the fuel mix, in the combustion chamber internal combustion, the hot flue gas after the burning is discharged the combustion chamber by hot flue gas passing away.
There is following shortcoming at least in above-mentioned prior art: at first, when fuel value was identical, Cryogenic air was combustion-supporting, and the burning indoor temperature is lower, and the combustion chamber temperature skewness, has the localized hyperthermia district, influences the life-span of body of heater; Secondly, exhaust gas temperature is higher, takes away a large amount of heat energy, and efficiency of combustion is lower.
Summary of the invention
The purpose of this invention is to provide uniformity of temperature profile in a kind of ignition temperature height, the combustion chamber, low grade fuel single prewarming and thermal storage type condensation energy-saving boiler that efficiency of combustion is high.
The objective of the invention is to be achieved through the following technical solutions:
Low grade fuel single prewarming and thermal storage type condensation energy-saving boiler of the present invention, comprise body of heater, described body of heater is provided with a plurality of burners, described burner is provided with high temperature combustion air inlet and fuel entrance, described high temperature combustion air inlet is connected with regenerator, described regenerator is connected with normal temperature combustion air inlet and low-temperature flue gas outlet, and described low-temperature flue gas outlet is connected with the condensation heat recover.
As seen from the above technical solution provided by the invention, low grade fuel single prewarming and thermal storage type condensation energy-saving boiler of the present invention, because body of heater is provided with a plurality of burners, described burner is provided with high temperature combustion air inlet and fuel entrance, described high temperature combustion air inlet is connected with regenerator, described regenerator is connected with normal temperature combustion air inlet and low-temperature flue gas outlet, and described low-temperature flue gas outlet is connected with the condensation heat recover.When flue gas is discharged on the one hand,, reduced heat-energy losses, improved efficiency of combustion through regenerator, the waste heat recovery of condensation heat recover two-stage; On the other hand, during burner combustion, the normal temperature combustion air is combustion-supporting through participating in after the regenerator preheating, can improve ignition temperature; The third aspect, a plurality of burners can adopt periodically reversing combustion, have eliminated localized hyperthermia district in the combustion chamber, make Temperature Distribution more even, have improved the burner hearth life-span.Be applicable to various boilers, be particularly useful for the fuel gas with low heat value boiler.
Description of drawings
Fig. 1 is to be the structure principle chart of boiler of the prior art;
Fig. 2 is the structure principle chart of low grade fuel single prewarming and thermal storage type condensation energy-saving boiler of the present invention.
The specific embodiment
Low grade fuel single prewarming and thermal storage type condensation energy-saving boiler of the present invention, its preferable specific embodiment comprises body of heater as shown in Figure 2, the inside of body of heater constitutes the combustion chamber, on the wall of body of heater burner is housed, body of heater is equipped with two burners at least, can be provided with a plurality of burners.In described a plurality of burner, per two burners are a pair of, mutually the periodicity reversing combustion.1,2,3,4 pair of burner can be set, and also can be other quantity as required.
Described burner is provided with high temperature combustion air inlet and fuel entrance, and high temperature combustion air inlet wherein is used as the high-temperature flue gas outlet when the burner burn-out.Specifically be that when burner combustion, high temperature combustion air inlet is used to enter the high temperature combustion air; When the burner burn-out, high temperature combustion air inlet is used to discharge high-temperature flue gas.
Described high temperature combustion air inlet is connected with regenerator, and described regenerator is connected with normal temperature combustion air inlet and low-temperature flue gas outlet, and described low-temperature flue gas outlet is connected with the condensation heat recover.Be provided with reversing arrangement between described normal temperature combustion air inlet and the low-temperature flue gas outlet.Specifically the normal temperature combustion air that can be connected with regenerator enters pipeline and the low-temperature flue gas discharge line is designed to a pipeline, at normal temperature combustion air inlet and exhanst gas outlet junction reversal valve is set.Also can in normal temperature combustion air inlet and low-temperature flue gas outlet, independent control valve be set.
Normal temperature combustion air inlet and low-temperature flue gas outlet are connected with air blast and air-introduced machine respectively.Normal temperature combustion air inlet, low-temperature flue gas outlet and fuel entrance place also are connected with volume control device respectively.
Among the embodiment shown in Figure 2, the normal temperature combustion air of every pair of burner inlet and low-temperature flue gas outlet interconnect, and are provided with reversing arrangement in the junction, can adopt four-way change-over valve to commutate, and also can adopt other reversing arrangement.
During boiler operatiopn, in every pair of burner, wherein during any burner combustion, another burner cuts out.In the described burner combustion process, the normal temperature combustion air inlet and the fuel entrance that are connected with this burner are opened the low-temperature flue gas port closing that is connected with this burner simultaneously; In the described burner burn-out process, the low-temperature flue gas outlet that is connected with this burner is opened, and the normal temperature combustion air inlet and the fuel entrance that are connected with this burner are simultaneously closed.
For example, when burner A burning, when burner B closes, after the normal temperature air process regenerator A preheating, it is combustion-supporting to become the high temperature air participation, and the temperature of the high temperature combustion air after the preheating can reach more than 900 ℃.Meanwhile, high-temperature flue gas release heat during through regenerator B, temperature are dropped to about 120 ℃-200 ℃ the back and are got rid of regenerator, further reclaim emptying behind the heat through the condensation heat recover again, and the temperature of the cold flue gas of emptying can be low to moderate 30 ℃-60 ℃.
After burning a period of time, the temperature of regenerator B raises, when the temperature of regenerator A drops to certain value, close burner A, start burner B, simultaneously, the normal temperature combustion air inlet of two burners and the reversing arrangement commutation of exhanst gas outlet junction participate in combustion-supporting, high-temperature flue gas process regenerator A release heat after the normal temperature combustion air process regenerator B preheating.The time of commutation was generally 30 seconds-200 seconds.
In the above-mentioned combustion process, by periodically commutation, regenerator A and regenerator B carry out the preheating of combustion air and the heat release of high-temperature flue gas by turns, reach the purpose of recovery waste heat and warm-up combustion-supporting air.
High-temperature flue gas is through after the regenerator release heat, and the temperature of flue gas can drop to 120 ℃-200 ℃, further reclaims emptying behind the heat through the condensation heat recover again, and the temperature of the cold flue gas of emptying can drop to 30 ℃-60 ℃.Because flue-gas temperature is lower during through the condensation heat recover, heat is further emitted in the part or all of condensation of steam meeting in the flue gas, realizes the abundant recovery of the latent heat of vaporization and physics sensible heat.
Be provided with condensate pipe in the described condensation heat recover, condensate pipe is connected with the water inlet pipe of drum.In the process of drum water inlet, the heat that the condensation heat recover is reclaimed is brought in the water of drum just, has made full use of waste heat.
In the above-mentioned burner combustion process, used fuel is that calorific value is smaller or equal to 2800kcal/Nm
3Gaseous fuel, can be 1400,2000,2400,2790kcal/Nm
3Gaseous fuel, also can be other low calorie fuels.
Low grade fuel single prewarming and thermal storage type condensation energy-saving boiler of the present invention when on the one hand hot flue gas is discharged, through regenerator, the waste heat recovery of condensation heat recover two-stage, has reduced heat-energy losses, has improved efficiency of combustion; On the other hand, during burner combustion, normal temperature air is combustion-supporting through participating in after the regenerator preheating, can improve ignition temperature; The third aspect, a plurality of burners adopt periodically reversing combustion, have eliminated localized hyperthermia district in the combustion chamber, make uniformity of temperature profile, have improved the burner hearth life-span.Be applicable to various boilers, be particularly useful for the fuel gas with low heat value boiler.
The above; only for the preferable specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (10)
1, a kind of low grade fuel single prewarming and thermal storage type condensation energy-saving boiler, comprise body of heater, it is characterized in that, described body of heater is provided with a plurality of burners, described burner is provided with high temperature combustion air inlet and fuel entrance, described high temperature combustion air inlet is connected with regenerator, and described regenerator is connected with normal temperature combustion air inlet and low-temperature flue gas outlet, and described low-temperature flue gas outlet is connected with the condensation heat recover.
2, low grade fuel single prewarming and thermal storage type condensation energy-saving boiler according to claim 1 is characterized in that, is provided with reversing arrangement between described normal temperature combustion air inlet and the low-temperature flue gas outlet.
3, low grade fuel single prewarming and thermal storage type condensation energy-saving boiler according to claim 1 is characterized in that, in described a plurality of burners, per two burners are a pair of, periodically reversing combustion.
4, low grade fuel single prewarming and thermal storage type condensation energy-saving boiler according to claim 3 is characterized in that, described burner has 2 to 4 pairs.
5, according to claim 3 or 4 described low grade fuel single prewarming and thermal storage type condensation energy-saving boilers, it is characterized in that, in the described a pair of burner, wherein during any burner combustion, another burner burn-out, and the high temperature combustion air of this burner inlet is used to discharge high-temperature flue gas.
6, according to each described low grade fuel single prewarming and thermal storage type condensation energy-saving boiler of claim 1 to 4, it is characterized in that, in the described burner combustion process, the normal temperature combustion air inlet that is connected with this burner is opened the low-temperature flue gas port closing that is connected with this burner simultaneously; In the described burner burn-out process, the low-temperature flue gas outlet that is connected with this burner is opened, and the normal temperature combustion air inlet that is connected with this burner is simultaneously closed.
According to each described low grade fuel single prewarming and thermal storage type condensation energy-saving boiler of claim 1 to 4, it is characterized in that 7, in the described burner combustion process, the calorific value of used fuel is smaller or equal to 2800kcal/Nm
3
8, low grade fuel single prewarming and thermal storage type condensation energy-saving boiler according to claim 7 is characterized in that, described fuel is gaseous fuel.
9, low grade fuel single prewarming and thermal storage type condensation energy-saving boiler according to claim 1 is characterized in that, is provided with condensate pipe in the described condensation heat recover.
10, low grade fuel single prewarming and thermal storage type condensation energy-saving boiler according to claim 9 is characterized in that, it also comprises drum, and described drum is connected with water inlet pipe, and described condensate pipe is connected with described water inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101184500A CN101338904A (en) | 2007-07-05 | 2007-07-05 | Low grade fuel single prewarming and thermal storage type condensation energy-saving boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101184500A CN101338904A (en) | 2007-07-05 | 2007-07-05 | Low grade fuel single prewarming and thermal storage type condensation energy-saving boiler |
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| Publication Number | Publication Date |
|---|---|
| CN101338904A true CN101338904A (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101184500A Pending CN101338904A (en) | 2007-07-05 | 2007-07-05 | Low grade fuel single prewarming and thermal storage type condensation energy-saving boiler |
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| CN (1) | CN101338904A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221219A (en) * | 2011-05-25 | 2011-10-19 | 无锡华光锅炉股份有限公司 | Direct air preheater for preheating boiler through garbage incineration |
| CN102913955A (en) * | 2012-06-13 | 2013-02-06 | 北京神雾环境能源科技集团股份有限公司 | Energy-saving fuel gas oven tool |
| CN103256716A (en) * | 2013-05-31 | 2013-08-21 | 于海智 | Method and device for recovering retention heat of gas heating water heater |
| CN108072027A (en) * | 2016-11-11 | 2018-05-25 | 中国石油化工股份有限公司抚顺石油化工研究院 | A kind of injection boiler |
| CN108253409A (en) * | 2018-01-29 | 2018-07-06 | 山东科技大学 | Efficient minimum discharge heat accumulating type multi fuel gasification and combustion boiler |
| CN110131001A (en) * | 2019-04-24 | 2019-08-16 | 中国神华能源股份有限公司 | The regulation method of electricity generation system and electricity generation system |
| CN114992864A (en) * | 2021-02-20 | 2022-09-02 | 芜湖美的厨卫电器制造有限公司 | Gas water heater, control method and storage medium thereof |
-
2007
- 2007-07-05 CN CNA2007101184500A patent/CN101338904A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221219A (en) * | 2011-05-25 | 2011-10-19 | 无锡华光锅炉股份有限公司 | Direct air preheater for preheating boiler through garbage incineration |
| CN102913955A (en) * | 2012-06-13 | 2013-02-06 | 北京神雾环境能源科技集团股份有限公司 | Energy-saving fuel gas oven tool |
| CN102913955B (en) * | 2012-06-13 | 2016-03-30 | 北京神雾环境能源科技集团股份有限公司 | A kind of energy-saving gas cooker |
| CN103256716A (en) * | 2013-05-31 | 2013-08-21 | 于海智 | Method and device for recovering retention heat of gas heating water heater |
| CN103256716B (en) * | 2013-05-31 | 2015-06-24 | 于海智 | Method and device for recovering retention heat of gas heating water heater |
| CN108072027A (en) * | 2016-11-11 | 2018-05-25 | 中国石油化工股份有限公司抚顺石油化工研究院 | A kind of injection boiler |
| CN108253409A (en) * | 2018-01-29 | 2018-07-06 | 山东科技大学 | Efficient minimum discharge heat accumulating type multi fuel gasification and combustion boiler |
| CN108253409B (en) * | 2018-01-29 | 2024-04-23 | 山东科技大学 | High-efficiency and ultra-low emission thermal storage multi-fuel gasification combustion boiler |
| CN110131001A (en) * | 2019-04-24 | 2019-08-16 | 中国神华能源股份有限公司 | The regulation method of electricity generation system and electricity generation system |
| CN114992864A (en) * | 2021-02-20 | 2022-09-02 | 芜湖美的厨卫电器制造有限公司 | Gas water heater, control method and storage medium thereof |
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Open date: 20090107 |