CN102042592B - Trapezoidal counter current flow dimethyl ether/air diffusion combustion system - Google Patents
Trapezoidal counter current flow dimethyl ether/air diffusion combustion system Download PDFInfo
- Publication number
- CN102042592B CN102042592B CN2010105597576A CN201010559757A CN102042592B CN 102042592 B CN102042592 B CN 102042592B CN 2010105597576 A CN2010105597576 A CN 2010105597576A CN 201010559757 A CN201010559757 A CN 201010559757A CN 102042592 B CN102042592 B CN 102042592B
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- China
- Prior art keywords
- fuel
- dimethyl ether
- combustion
- air
- burner hearth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 title claims abstract description 126
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 79
- 238000009792 diffusion process Methods 0.000 title claims abstract description 17
- 239000000446 fuel Substances 0.000 claims abstract description 73
- 239000007921 spray Substances 0.000 claims description 22
- 238000002156 mixing Methods 0.000 claims description 11
- 150000005218 dimethyl ethers Chemical class 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- 239000000047 product Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- -1 ether compound Chemical class 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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 invention provides a trapezoidal counter current flow dimethyl ether/air high-efficiency diffusion combustion system, and aims to increase the disturbance degree and contact area of dimethyl ether and air, make the dimethyl ether more fully combusted, and correspondingly increase combustion temperature. A fuel is sprayed to a hearth through a stepped fuel inlet, so that the fuel is subjected to staged combustion; more than three stages of combustion can be performed, namely the fuel is insufficiently combusted at the previous stage, and the fuel can be continuously combusted at the next stage, so that the fuel is more fully combusted; the fuel is sprayed to the hearth in a stepped mode, and the combustion product at the previous stage can preheat the fuel at the next stage, so that the combustion temperature and combustion efficiency can be increased; and the dimethyl ether and the air are sprayed to the hearth along the same direction or different directions, so that the dimethyl ether and the air are fully mixed, and the combustion efficiency is high. The system realizes high-efficiency diffusion combustion, has high combustion efficiency and is environmental-friendly, and the method is simple, and easy to implement.
Description
Technical field
The present invention is dimethyl ether and air burning system, particularly a kind of trapezoidal counter current flow dimethyl ether/air diffusion combustion system.
Background technology
The molecular formula of dimethyl ether (DME) is CH
3OCH
3, be the simplest ether compound of structure, it does not contain the C-C key, only contains c h bond and C-O key, and contains aerobic in the molecule, and promptly containing the oxygen mass percent is 34.8%.Just because of this, dimethyl ether is the gas of colorless and odorless at normal temperatures and pressures, have good burning performance, and no black smoke, and adopt flue gas recirculation to reduce the generation of NOx, be considered to a kind of fuel that development potentiality is arranged very much.Though dimethyl ether has many good qualities, lower the low heat value of dimethyl ether, only be the half the of diesel oil, natural gas, (28.4MJ/kg), so the theoretical temperature combustion (t=Q of dimethyl ether
Low/ V*c) very low, the temperature of burning with general gas combustion apparatus can only reach 1550K; And under identical stove combustion of methane, its ignition temperature can reach 2910K.How solving this contradiction is pendulum another problem that must tackle key problems in face of the heat energy worker.Pass through extensive work personnel experimental study repeatedly afterwards and found to adopt trapezoidal counter current flow diffusion burner to increase the level of disruption of dimethyl ether and air and the method for contact area, made the more abundant of dimethyl ether burning, improved ignition temperature accordingly.How to implement and improve combustion system, mention the problem that Gao Shi researcher constantly inquires into to efficiency of combustion.
Summary of the invention
Main purpose of the present invention is to solve technological existing deficiency at present, thereby proposes a kind of raising efficiency of combustion obvious results highly effective combustion system.
The present invention is directed to above-mentioned technical problem mainly is to be able to further improvement through following technical proposals: the efficient diffusion combustion of a kind of trapezoidal counter current flow dimethyl ether/air system; It is characterized in that: this combustion system comprises burner hearth (1), cool air inlet (2), one-level dimethyl ether fuel inlet (3), secondary dimethyl ether fuel inlet (4), three grade dimethyl ether fuel inlets (5) and combustion product outlet (6); An air and a grade dimethyl ether get into burner hearth from air intake (2) and the concentric jet of grade dimethyl ether inlet (3) respectively; The burning while spreading; Arrive the burning of burner hearth center; Then two grade dimethyl ethers from two grade dimethyl ethers enter the mouth (4) spray into one-level burnt fuel and product and mix; Carry out combustion reaction for the third time again, three grade dimethyl ethers from three grade dimethyl ethers enter the mouth (5) spray into firsts and seconds burnt fuel and product and mix, the product of burning discharges out of the furnace through fuel Products outlet (6).
Fuel adopts step to spray into burner hearth, makes and the burning more than three grades can take place fuel-staged combustion, i.e. the fuel combustion of upper level is incomplete, and next stage can burn away.
Fuel adopts step to spray into burner hearth, and the combustion product of upper level has the preheating effect to the fuel of next stage.
Dimethyl ether and air adopt in the same way with incorgruous and spray into burner hearth mixing after-combustion.
Dimethyl ether of the present invention and air burning system improve the method for efficiency of combustion: adopt the efficient diffusion combustion of trapezoidal counter current flow dimethyl ether/air system; For the level of disruption that increases dimethyl ether and air and the method for contact area; Make the more abundant of dimethyl ether burning, improve ignition temperature accordingly; Fuel sprays into burner hearth through the step fuel inlet, makes the burning more than three grades to take place fuel-staged combustion, i.e. the fuel combustion of upper level is incomplete, and next stage can burn away, and burning is more abundant like this; Fuel adopts step to spray into burner hearth, and the combustion product of upper level has the preheating effect to the fuel of next stage, can improve ignition temperature and efficient like this; Dimethyl ether and air adopt in the same way with incorgruous and spray into burner hearth mixings after-combustion, and mixing is more abundant like this, and efficiency of combustion is also higher.
The efficient diffusion combustion of the trapezoidal counter current flow dimethyl ether/air of the present invention system: 1. characteristics adopt the efficient diffusion combustion of trapezoidal counter current flow dimethyl ether/air system; For the level of disruption that increases dimethyl ether and air and the method for contact area; Make the more abundant of dimethyl ether burning, improve ignition temperature accordingly.2. fuel sprays into burner hearth through the step fuel inlet, makes the burning more than three grades to take place fuel-staged combustion, i.e. the fuel combustion of upper level is incomplete, and next stage can burn away, and burning is more abundant like this.3. fuel adopts step to spray into burner hearth, and the combustion product of upper level has the preheating effect to the fuel of next stage, can improve ignition temperature and efficient like this.4. dimethyl ether and air adopt in the same way with incorgruous and spray into burner hearth mixings after-combustion, and mixing is more abundant like this, and efficiency of combustion is also higher.
Therefore, the beneficial effect of patent of the present invention is:
1, through adopting the efficient diffusion combustion of trapezoidal counter current flow dimethyl ether/air system, for the level of disruption that increases dimethyl ether and air and the method for contact area, make more abundant that dimethyl ether burns, improve ignition temperature accordingly.
2, fuel sprays into burner hearth through the step fuel inlet, makes the burning more than three grades to take place fuel-staged combustion, i.e. the fuel combustion of upper level is incomplete, and next stage can burn away, and burning is more abundant like this.
3, fuel adopts step to spray into burner hearth, and the combustion product of upper level has the preheating effect to the fuel of next stage, can improve ignition temperature and efficient like this.
4, dimethyl ether and air adopt in the same way with incorgruous and spray into burner hearth mixings after-combustion, and mixing is more abundant like this, and efficiency of combustion is also higher.
Description of drawings
Further specify flesh and blood of the present invention below in conjunction with accompanying drawing with instance, but content of the present invention is not limited to this.
Fig. 1 is a structural representation of the present invention.
Among Fig. 1,1-burner hearth, 2-cool air inlet, 3-one-level dimethyl ether fuel inlet, 4-secondary dimethyl ether fuel inlet, 5-three grade dimethyl ether fuel inlets, the outlet of 6-combustion product.
The specific embodiment
The invention provides the efficient diffusion combustion of a kind of trapezoidal counter current flow dimethyl ether/air system, this combustion system comprises burner hearth (1), cool air inlet (2), one-level dimethyl ether fuel inlet (3), secondary dimethyl ether fuel inlet (4), three grade dimethyl ether fuel inlets (5), combustion product outlet (6).
As shown in Figure 1, an air and a grade dimethyl ether get into burner hearth, the burning while spreading from air intake (2) and the concentric jet of grade dimethyl ether inlet (3) respectively; It is more abundant to arrive burner hearth center ratio of combustion, then two grade dimethyl ethers from two grade dimethyl ethers enter the mouth (4) spray into one-level burnt fuel and product and mix, secondary fuel is by one-level fuel and combustion product preheating; Make the secondary fuel ignition temperature increase, efficiency of combustion improves, the second-time burning of burner hearth generation at this moment; Also make one-level fuel not burn and at this second-time burning takes place completely, it is further burnt fully, if burn also not exclusively; Can carry out combustion reaction for the third time, its fuel of going out is burnt more completely, last three grade dimethyl ethers from three grade dimethyl ethers enter the mouth (5) spray into firsts and seconds burnt fuel and product and mix; Three grades of fuel are made three grades of fuel combustion temperature increase by firsts and seconds fuel and combustion product preheating, and efficiency of combustion improves; At this moment three burnings take place in burner hearth; Also make firsts and seconds fuel not burn and at this three burnings take place completely, further burning is complete to make it, and the product of burning discharges out of the furnace through fuel Products outlet (6).
Step burning makes fuel-staged combustion; Make it not take resource each other, each spontaneous combustion is not disturbed each other, can also make upper level fuel to the preheating of next stage fuel; Improve efficiency of combustion; And the upper level unburned completely, and next stage can then burn, and what discharge out of the furnace at last is the combustion product more completely that burns.
Dimethyl ether and air adopt in the same way with incorgruous and spray into burner hearth mixings after-combustion, and mixing is more abundant like this, and efficiency of combustion is also higher.Two-stage counter current flow fuel has caused destruction to concentric jet main flow flow field, has increased the disturbance in burner hearth inner fluid flow field, makes the more abundant of interior fuel of stove and air mixing, and the contact area of burning is bigger, has improved efficiency of combustion.
The present invention the efficient diffusion combustion of a kind of trapezoidal counter current flow dimethyl ether/air system, it is not high to be suitable for some fuel ignition temperature in general simple concentric jet stove, and adopts this combustion system can make its burning more abundant, the fuel of raising ignition temperature.
Claims (4)
1. the efficient diffusion combustion of trapezoidal counter current flow dimethyl ether/air system; It is characterized in that: this combustion system comprises burner hearth (1), cool air inlet (2), one-level dimethyl ether fuel inlet (3), secondary dimethyl ether fuel inlet (4), three grade dimethyl ether fuel inlets (5) and combustion product outlet (6); An air and a grade dimethyl ether get into burner hearth from one-level dimethyl ether fuel inlet (3) and the concentric jet of cool air inlet (2) respectively; The burning while spreading; Arrive the burning of burner hearth center; Then two grade dimethyl ethers from one-level dimethyl ether fuel inlet relatively to secondary dimethyl ether fuel inlet (4) spray into one-level burnt fuel and product and mix; Carry out the combustion reaction second time again, last three grade dimethyl ethers from one-level dimethyl ether fuel inlet relatively to three grade dimethyl ether fuel inlets (5) spray into firsts and seconds burnt fuel and product and mix, the product of burning exports (6) through fuel Products and discharges out of the furnace.
2. the efficient diffusion combustion of trapezoidal counter current flow dimethyl ether/air according to claim 1 system; It is characterized in that: fuel adopts step to spray into burner hearth, makes and the burning more than three grades takes place fuel-staged combustion; The fuel combustion of upper level is incomplete, and next stage can burn away.
3. the efficient diffusion combustion of trapezoidal counter current flow dimethyl ether/air according to claim 1 system is characterized in that: fuel adopts step to spray into burner hearth, and the combustion product of upper level has the preheating effect to the fuel of next stage.
4. the efficient diffusion combustion of trapezoidal counter current flow dimethyl ether/air according to claim 1 system is characterized in that: dimethyl ether and air adopt in the same way with incorgruous and spray into burner hearth mixing after-combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105597576A CN102042592B (en) | 2010-11-26 | 2010-11-26 | Trapezoidal counter current flow dimethyl ether/air diffusion combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105597576A CN102042592B (en) | 2010-11-26 | 2010-11-26 | Trapezoidal counter current flow dimethyl ether/air diffusion combustion system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102042592A CN102042592A (en) | 2011-05-04 |
| CN102042592B true CN102042592B (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105597576A Expired - Fee Related CN102042592B (en) | 2010-11-26 | 2010-11-26 | Trapezoidal counter current flow dimethyl ether/air diffusion combustion system |
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| CN103471100B (en) * | 2013-09-13 | 2016-09-21 | 黄海卫 | The burner that the low firepower of noise is strong |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230977A (en) * | 1997-07-01 | 1999-10-06 | Bp阿莫科公司 | Dimethyl ether fuel and method of generating power in dry low NOx combustion system |
| CN201269521Y (en) * | 2008-08-06 | 2009-07-08 | 吕世光 | Dimethyl ether gas-fired boiler |
| CN101871731A (en) * | 2010-06-02 | 2010-10-27 | 昆明理工大学 | Large-scale industrial combustion method of dimethyl ether |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005083717A (en) * | 2003-09-11 | 2005-03-31 | Asahi Seisakusho Co Ltd | Dimethyl ether combustor |
-
2010
- 2010-11-26 CN CN2010105597576A patent/CN102042592B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230977A (en) * | 1997-07-01 | 1999-10-06 | Bp阿莫科公司 | Dimethyl ether fuel and method of generating power in dry low NOx combustion system |
| CN201269521Y (en) * | 2008-08-06 | 2009-07-08 | 吕世光 | Dimethyl ether gas-fired boiler |
| CN101871731A (en) * | 2010-06-02 | 2010-10-27 | 昆明理工大学 | Large-scale industrial combustion method of dimethyl ether |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2005-83717A 2005.03.31 |
| 张立志等.二甲醚_空气对向流扩散燃烧反应历程的数值研究.《工程热物理学报》.2009,第30卷(第12期),第2137～2140页. * |
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| CN102042592A (en) | 2011-05-04 |
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