CN110145794A - A kind of method and burnt gas wall hanging furnace reducing wall-hung boiler discharged nitrous oxides - Google Patents
A kind of method and burnt gas wall hanging furnace reducing wall-hung boiler discharged nitrous oxides Download PDFInfo
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- CN110145794A CN110145794A CN201910291929.7A CN201910291929A CN110145794A CN 110145794 A CN110145794 A CN 110145794A CN 201910291929 A CN201910291929 A CN 201910291929A CN 110145794 A CN110145794 A CN 110145794A
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- collecting hood
- fume collecting
- exhaust fume
- air
- hung boiler
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- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003517 fume Substances 0.000 claims abstract description 44
- 239000007789 gas Substances 0.000 claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 claims abstract description 12
- 230000036961 partial effect Effects 0.000 claims abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003546 flue gas Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 240000002853 Nelumbo nucifera Species 0.000 claims description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 61
- 238000012360 testing method Methods 0.000 description 16
- 239000000446 fuel Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 206010020843 Hyperthermia Diseases 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000036031 hyperthermia Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
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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 discloses a kind of method for reducing wall-hung boiler discharged nitrous oxides, it is characterized in that, in the left and right sides of burner setting deflector, exhaust fume collecting hood baffle is set between heat exchanger and exhaust fume collecting hood, change air flow structure using deflector and exhaust fume collecting hood baffle, keep flue gas flow rate in combustion chamber uniform, to make the temperature of each partial points of burner, excess air coefficient be consistent substantially, achieve the purpose that thermal NO x is inhibited to generate.The present invention can reduce the thermal NO x concentration of emission of existing configuration mainstream normal atmospheric formula burner product, to achieve the purpose that reduce wall-hung boiler discharged nitrous oxides concentration；And complete machine structure change is small, it is at low cost.The present invention also provides a kind of burnt gas wall hanging furnaces.
Description
Technical field
The present invention relates to combustion of natural gas technical field more particularly to a kind of methods for reducing wall-hung boiler discharged nitrous oxides
And burnt gas wall hanging furnace.
Background technique
As national energy-saving environmental requirement is reinforced, more and more areas are more and more tighter for the flue gas emission of wall-hung boiler
Lattice.According to the test method of GB25034-2010 " gas-heating water heater ", it is desirable that discharged nitrous oxides concentration reaches energy-saving ring
Protect (nitrogen oxides requires to be lower than 120mg/kw*h), even level Four discharge (nitrogen oxides requires to be lower than 100mg/kw*h).It is existing
There is the normal atmospheric formula wall-hung boiler of the market mainstream to have focused largely on three-level discharge, it is difficult to reach the requirement of level Four discharge, what this made
The scope of application for being configured with the wall-hung boiler of atmospheric burner is restricted.
Existing gas utensil reaches low-nitrogen oxide discharging using shade burner, water cooled burner, full premix combustion mode
It is required that at high cost.
Summary of the invention
Aiming at the problems existing in the prior art, small, application that the purpose of the present invention is to provide a kind of changes of complete machine structure
The method of reduction wall-hung boiler discharged nitrous oxides at low cost.
The present invention also provides a kind of burnt gas wall hanging furnaces that can reduce discharged nitrous oxides.
To achieve the above objectives, the present invention adopts the following technical scheme that.
A method of reducing wall-hung boiler discharged nitrous oxides, which is characterized in that setting is led in the left and right sides of burner
Exhaust fume collecting hood baffle is arranged in flowing plate between heat exchanger and exhaust fume collecting hood, changes air flow structure using deflector and exhaust fume collecting hood baffle,
Keep flue gas flow rate in combustion chamber uniform, so that the temperature of each partial points of burner, excess air coefficient be made to be consistent substantially, reaches
To the purpose for inhibiting thermal NO x to generate.
As a further illustration of the above scheme, increasing the number of burner fire screening in the case where total heat duties are constant
Amount, so that making the thermic load of single fire row piece reduces, corresponding maximum temperature after reducing burning reaches and inhibits thermal NO x raw
At purpose.
As a further illustration of the above scheme, increase into air capacity, so that the air capacity for being not engaged in burning increases, benefit
Heat is taken away with this partial air, to reduce flame temperature, achievees the purpose that thermal NO x is inhibited to generate.
As a further illustration of the above scheme, described increase into air capacity is by improving rotation speed of fan and/or increase
The mode of smoke pipe air inlet is realized.
A kind of burnt gas wall hanging furnace, including wall hanging furnace body are sequentially arranged at the intrinsic combustion of the wall-hung boiler from top to bottom
Burner, heat exchanger, exhaust fume collecting hood, and the blower being mounted on the exhaust fume collecting hood；It is characterized in that, being equipped in the exhaust fume collecting hood
The surrounding of exhaust fume collecting hood baffle, the exhaust fume collecting hood baffle is contacted with the inner wall of the exhaust fume collecting hood, is equipped on the exhaust fume collecting hood baffle
Several air holes.
As a further illustration of the above scheme, air penetrability on front side of the exhaust fume collecting hood baffle be greater than rear side air penetrability,
The air penetrability on right side is greater than the air penetrability in left side, the air penetrability of the left and right sides is greater than intermediate air penetrability.
As a further illustration of the above scheme, the size of the air penetrability is by changing the size of the air hole come real
Existing, alternatively, the size of the air penetrability is realized by changing the density of the air hole.
As a further illustration of the above scheme, the air hole includes several square holes and several round holes, the side
Shape hole includes at least two various sizes of holes, and the round hole includes the hole of at least two different pore sizes.
As a further illustration of the above scheme, above being respectively arranged on the left side and the right side and be oriented to air-flow of the burner
Deflector.
As a further illustration of the above scheme, the cross section of the deflector is L-shaped.
The beneficial effects of the present invention are:
A kind of method and burnt gas wall hanging furnace reducing wall-hung boiler discharged nitrous oxides provided by the invention, by burner
The left and right sides setting deflector, between heat exchanger and exhaust fume collecting hood be arranged exhaust fume collecting hood baffle, it is normal that existing configuration mainstream can be reduced
The thermal NO x concentration of emission of atmospheric burner product is advised, to reach the mesh for reducing wall-hung boiler discharged nitrous oxides concentration
's；And complete machine structure change is small, it is at low cost.
Detailed description of the invention
Fig. 1 show burnt gas wall hanging furnace structural schematic diagram provided by the invention.
Fig. 2 show exhaust fume collecting hood baffle arrangement schematic diagram.
Fig. 3 show deflector structure schematic diagram.
Fig. 4 show existing burnt gas wall hanging furnace structural schematic diagram.
Fig. 5 show test point distribution map.
Description of symbols:
1: wall hanging furnace body, 2: burner, 3: heat exchanger, 4: exhaust fume collecting hood, 5: blower, 6: exhaust fume collecting hood baffle, 7: air hole,
8: deflector.
Specific embodiment
In the description of the present invention, it should be noted that " transverse direction ", " vertical if any term " center " for the noun of locality
To ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top",
The indicating positions such as "bottom", "inner", "outside", " clockwise ", " counterclockwise " and positional relationship are orientation based on the figure or position
Relationship is set, the narration present invention is merely for convenience of and simplifies description, rather than the device or element of indication or suggestion meaning are necessary
It constructs and operates with specific orientation, with particular orientation, should not be understood as limiting specific protection scope of the invention.
In addition, being used for description purposes only if any term " first ", " second ", it is not understood to indicate or imply relatively heavy
The property wanted or the quantity for implicitly indicating technical characteristic." first " is defined as a result, " second " feature can be expressed or implicit include
One or more this feature, in the present description, " at least " are meant that one or more, unless otherwise clearly having
The restriction of body.
In the present invention, except as otherwise clear stipulaties and restriction, should make if any term " assembling ", " connected ", " connection " term
Broad sense goes to understand, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It is also possible to mechanical connect
It connects；It can be directly connected, be also possible to be connected by intermediary, can be and be connected inside two elements.For ability
For the those of ordinary skill of domain, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In invention, unless otherwise specified and limited, fisrt feature second feature "upper" or "lower" may include
First and second features directly contact, also may include fisrt feature and second feature be not direct contact but by them it
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " under " and " above " include fisrt feature
Right above two features and oblique upper, or be only to indicate that first feature horizontal height is higher than the height of second feature.Fisrt feature
Second feature " on ", " under " and " below " include that fisrt feature is directly under or diagonally below the second feature, or only table
Show first feature horizontal height lower than second feature.
Below with reference to the attached drawing of specification, a specific embodiment of the invention is further described, is made of the invention
Technical solution and its benefits are clearer.It describes embodiment below with reference to attached drawing to be exemplary, it is intended to solve
The present invention is released, and is not considered as limiting the invention.
Embodiment one
Find through applicant's consulting literatures and research practice: existing wall hanging furnace structure and atmospheric burner collocation generate
Nitrogen oxides mainly include the following types:
1, micro fuel type NOx, fuel type NOx are that the nitrogen-atoms being present in fuel in the form of compound is oxidized
And generate.By purification process, nitrogen compound content is seldom in gaseous fuel for civilian use, and during fuel type NOx has
Warm formation characteristic generates temperature at 600-900 DEG C, and the temperature of existing atmospheric burner burning is generally greater than this value,
Therefore atmospheric burning type is nearly free from fuel type NOx.
2, about 10% Quick-type NOx, Quick-type NOx are rich hydrocarbon class A fuel As in fuel overrich (α < 1.0) condition
Peculiar phenomenon when lower burning, in partly-premixed inner cone of flame Surface Creation.
3, thermal NO x accounts about 90%.The thermal NO x that existing wall-hung boiler collocation atmospheric burner generates is main
Caused by several factors: 1) ignition temperature is uneven, generates localized hyperthermia.By the formation mechanism of thermal NO x it is found that flame front
It is interior largely to generate thermal NO x.It is in the downstream of flame front, especially flame face downstream part that thermal NO x, which is largely generated,
High-temperature region, local oxygen concentration is big and those of gas residence time is long place is easier to generate thermal NO x.2) excess air system
The influence that number α generates thermal NO x, excess air coefficient combine temperature and the two key factors of oxygen concentration to nitrogen
The influence of oxide production quantity.The production quantity highest of burner combustion nitrogen oxides usually near α=1.0, with α reduce or
The production quantity for increasing nitrogen oxides also declines.It can be seen that temperature distribution is non-uniform in combustion chamber, there are localized hyperthermias to cause greatly
The thermal NO x of amount is generated.
In addition, the variation of thermic load can cause the variation of flame temperature, and then shadow is also generated to thermal NO x production quantity
It rings.In addition to methanol, the thermal NO x concentration of other fuel combustions increases with the increase of thermic load.
For this purpose, the present embodiment provides a kind of methods for reducing wall-hung boiler discharged nitrous oxides, which is characterized in that in burner
The left and right sides setting deflector, between heat exchanger and exhaust fume collecting hood be arranged exhaust fume collecting hood baffle, utilize deflector and exhaust fume collecting hood gear
Plate changes air flow structure, keeps flue gas flow rate in combustion chamber uniform, to make the temperature of each partial points of burner, excess air system
Base is originally consistent, and achievees the purpose that thermal NO x is inhibited to generate.
Further, in the case where total heat duties are constant, increase the quantity of burner fire screening, to make single fire row
The thermic load of piece reduces, and corresponding maximum temperature after reducing burning achievees the purpose that thermal NO x is inhibited to generate.
Further, it increases into air capacity, so that the air capacity for being not engaged in burning increases, utilizes this partial air band
Heat is walked, to reduce flame temperature, achievees the purpose that thermal NO x is inhibited to generate.Described increase into air capacity is by mentioning
High rotation speed of fan and/or increase the mode of smoke pipe air inlet to realize.
A kind of method reducing wall-hung boiler discharged nitrous oxides provided in this embodiment, it is conventional can to reduce existing configuration mainstream
The discharged nitrous oxides concentration of atmospheric burner product, complete machine structure change is small, and application cost is low.
Embodiment two
As shown in Figure 1, a kind of burnt gas wall hanging furnace, including wall hanging furnace body 1, it is sequentially arranged at the wall-hung boiler from top to bottom
Burner 2, heat exchanger 3, exhaust fume collecting hood 4 in ontology 1, and the blower 5 being mounted on the exhaust fume collecting hood 4；It is characterized in that,
It is equipped with exhaust fume collecting hood baffle 6 in the exhaust fume collecting hood 4, the surrounding of the exhaust fume collecting hood baffle 6 is contacted with the inner wall of the exhaust fume collecting hood 4,
The exhaust fume collecting hood baffle 6 is equipped with several air holes 7.
Wherein, as shown in Fig. 2, the air hole 7 includes two square holes and several round holes, two square holes are located at institute
The front side of exhaust fume collecting hood baffle 6 is stated, and there are different sizes；The round hole is distributed in a jumble on exhaust fume collecting hood baffle 6, and including extremely
The hole of few two kinds of different pore sizes.The opening size of each square hole is greater than the opening size of maximum round hole.
The air penetrability of 6 front side of exhaust fume collecting hood baffle is finally made to be greater than the ventilative of rear side by the setting of each air hole 7
Rate, right side air penetrability be greater than the air penetrability in left side, the air penetrability of the left and right sides is greater than intermediate air penetrability, to guarantee as far as possible
Flue gas flow rate is uniform in combustion chamber.
Well known to those skilled in the art: the size of air penetrability can realize by changing the size of the air hole,
It can be realized by changing the density of the air hole.As long as meeting the air penetrability in each region of exhaust fume collecting hood baffle 6
Requirement is stated, concrete shape, density as air hole are not limited to the example above.
Further, symmetrical deflector 8 is further respectively had, in the left and right sides of the burner 2 with further
Guarantee that the indoor flue gas flow rate of burning is uniform.
As shown in figure 3, the cross section of the deflector 8 is L-shaped, in order to assemble and water conservancy diversion.
Preferably to embody technical effect brought by the above-mentioned transformation to burnt gas wall hanging furnace.Experiment is compared below.
The wall-hung boiler of an existing 20kW in the market is chosen, the specified heat input of the product is 20kW, and specified minimum thermal is negative
Lotus is 8kW；Burner has 9 fire row pieces, and the signal of internal-combustion heat exchanging part is as shown in Figure 4.By GB25034-2010 " combustion gas
Water heater for heating " test method, the discharged nitrous oxides of the product are tested, test result is as shown in table 1.
Table 1, existing wall-hung boiler nitrogen oxides actual emission
The product each point NO_x formation situation is furtherd investigate, specifically by between research main heat exchanger and exhaust fume collecting hood
Each amount of nitrogen oxides.To be divided into above heat exchanger from inside to outside 8 points of every row, by left-to-right 11 points of every row,
88 test points altogether；It can reflect the production quantity of each partial points nitrogen oxides by this 88 test points.Test point is distributed such as
Shown in Fig. 5.
Through pointwise test, the test result of each selected point nitrogen oxides is shown in Table 2 and table 3, and wherein table 2 is rated heat input, rated heat load
The discharge amount of each test point nitrogen oxides under 20kW state, table 3 are each test point nitrogen oxidation under specified minimum thermic load 8kW state
The discharge amount of object.
The discharge amount of each selected point nitrogen oxides under table 2, existing wall-hung boiler rated heat input, rated heat load 20kW state
| NOx(mg/kw.h) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| A | 136.79 | 157.66 | 156.89 | 143.54 | 152.42 | 146 | 149.9 | 158.01 | 187.79 | 187.13 | 275.78 |
| B | 113.3 | 96.57 | 108 | 103.25 | 113.56 | 116.57 | 126.77 | 137.29 | 154.4 | 192.44 | 138.29 |
| C | 143.79 | 152.12 | 138.9 | 120.11 | 126.95 | 131.36 | 124 | 132.46 | 187.1 | 191.52 | 195.42 |
| D | 136.88 | 140.4 | 137.51 | 139.04 | 139.9 | 141.5 | 143.02 | 142.46 | 171.12 | 219.06 | 238.85 |
| E | 143.5 | 134 | 150 | 137 | 143 | 148 | 149 | 146 | 167 | 225 | 168 |
| F | 150.8 | 146 | 147 | 146 | 154 | 158 | 165 | 173 | 214 | 256 | 250 |
| G | 152.8 | 160 | 160 | 162 | 163 | 172 | 178 | 181 | 197 | 257 | 245 |
| H | 176 | 160 | 164 | 171 | 171 | 176 | 185 | 190 | 224 | 206 | 172 |
The discharge amount of each selected point nitrogen oxides under the specified minimum thermic load 8kW state of table 3, existing wall-hung boiler
From table 2 and table 3 it can be seen that each partial points NO_x formation is very uneven after the operation burning of existing wall-hung boiler
Even, there are the points that many nitrogen oxides are excessively high.Such as under rated heat input, rated heat load 20kW state, discharge amount is more than the survey of 150mg/kw.h
Pilot is up to 66；Under the specified minimum thermic load 8kW state of wall-hung boiler, discharge amount is more than the test point of 120mg/kw.h up to 60
It is a.
After being improved by structure provided in this embodiment, using same test mode, fuel wall hanging provided in this embodiment
Each test point nitrogen oxide emission of furnace is as shown in table 4 and table 5.Wherein table 4 is under improved rated heat input, rated heat load 20kW state
The discharge amount of each test point nitrogen oxides, table 5 are each test point nitrogen oxides under specified minimum thermic load 8kW state after improving
Discharge amount.
The discharge amount of each selected point nitrogen oxides under table 4, rated heat input, rated heat load 20kW state
| NOx(mg/kw.h) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| A | 129.33 | 127.12 | 125.23 | 129.12 | 128.25 | 130.22 | 108.47 | 109.15 | 118.01 | 110.75 | 125.75 |
| B | 113.3 | 96.57 | 108 | 103.25 | 113.56 | 116.57 | 116.77 | 117.29 | 117.38 | 115.22 | 128.29 |
| C | 113.79 | 122.12 | 117.9 | 120.11 | 116.95 | 121.36 | 124 | 112.46 | 104.83 | 114.34 | 119.09 |
| D | 116.88 | 110.4 | 117.51 | 119.04 | 119.9 | 101.5 | 113.02 | 112.46 | 117 | 115 | 120 |
| E | 108 | 119.09 | 103 | 118 | 113 | 116 | 118 | 115 | 122 | 120 | 117 |
| F | 140.8 | 119.33 | 116 | 113 | 117 | 110 | 116 | 113 | 112 | 109 | 107 |
| G | 112 | 115 | 120 | 122 | 109 | 117 | 113.5 | 114 | 113 | 123 | 125 |
| H | 109.6 | 127 | 128 | 120 | 119 | 114 | 108 | 107 | 116 | 114 | 108 |
The discharge amount of each selected point nitrogen oxides under table 5, specified minimum thermic load 8kW state
Table 6, the test method by GB25034-2010, improved wall-hung boiler nitrogen oxides actual emission
From table 4 and table 5 it can be seen that each partial points NO_x formation of improved burnt gas wall hanging furnace is relatively uniform, and
The discharge amount for effectively reducing nitrogen oxides, under rated heat input, rated heat load 20kW state, discharge amount is more than the test of 130mg/kw.h
Point only 2；It is more than the test point of 100mg/kw.h without discharge amount under the specified minimum thermic load 8kW state of wall-hung boiler；From
Table 6 is it can be seen that the wall-hung boiler concentration of emission of the configuration atmospheric burner after improving can achieve energy conservation and environmental protection even level Four row
Put standard.
From the foregoing description of structures and principles it should be understood by those skilled in the art that, the present invention not office
It is limited to above-mentioned specific embodiment, this hair is all fallen within using the improvement of techniques well known and substitution on the basis of the present invention
Bright protection scope, protection scope of the present invention should limit it by each claim and its equivalent.In specific embodiment
The part not illustrated is the prior art or common knowledge.
Claims (10)
1. a kind of method for reducing wall-hung boiler discharged nitrous oxides, which is characterized in that water conservancy diversion is arranged in the left and right sides of burner
Exhaust fume collecting hood baffle is arranged in plate between heat exchanger and exhaust fume collecting hood, changes air flow structure using deflector and exhaust fume collecting hood baffle, makes
Flue gas flow rate is uniform in combustion chamber, so that the temperature of each partial points of burner, excess air coefficient be made to be consistent substantially, reaches
The purpose for inhibiting thermal NO x to generate.
2. a kind of method for reducing wall-hung boiler discharged nitrous oxides according to claim 1, which is characterized in that negative in total heat
In the case that lotus is constant, increase the quantity of burner fire screening, so that making the thermic load of single fire row piece reduces, it is corresponding to reduce
Maximum temperature after burning achievees the purpose that thermal NO x is inhibited to generate.
3. a kind of method for reducing wall-hung boiler discharged nitrous oxides according to claim 1, which is characterized in that increase into sky
Tolerance is taken away heat using this partial air, to reduce flame temperature, is reached so that the air capacity for being not engaged in burning increases
To the purpose for inhibiting thermal NO x to generate.
4. a kind of method for reducing wall-hung boiler discharged nitrous oxides according to claim 3, which is characterized in that the increasing
It into air capacity is realized by way of improving rotation speed of fan and/or increasing smoke pipe air inlet.
5. a kind of burnt gas wall hanging furnace, including wall hanging furnace body are sequentially arranged at the intrinsic burning of the wall-hung boiler from top to bottom
Device, heat exchanger, exhaust fume collecting hood, and the blower being mounted on the exhaust fume collecting hood；It is characterized in that, being equipped with collection in the exhaust fume collecting hood
The surrounding of petticoat pipe baffle, the exhaust fume collecting hood baffle is contacted with the inner wall of the exhaust fume collecting hood, if being equipped on the exhaust fume collecting hood baffle
Parch stomata.
6. a kind of burnt gas wall hanging furnace according to claim 5, which is characterized in that the air penetrability on front side of the exhaust fume collecting hood baffle
It is greater than the air penetrability in left side greater than the air penetrability of the air penetrability of rear side, right side, the air penetrability of the left and right sides is greater than intermediate breathe freely
Rate.
7. a kind of burnt gas wall hanging furnace according to claim 6, which is characterized in that the size of the air penetrability is by changing institute
It states the size of air hole to realize, alternatively, the size of the air penetrability is realized by changing the density of the air hole
's.
8. a kind of burnt gas wall hanging furnace according to claim 6, which is characterized in that the air hole include several square holes and
Several round holes, the square hole include at least two various sizes of holes, and the round hole includes at least two different holes
The hole of diameter.
9. a kind of burnt gas wall hanging furnace according to claim 5, which is characterized in that distinguish in the left and right sides of the burner
Equipped with the deflector that air-flow is oriented to top.
10. a kind of burnt gas wall hanging furnace according to claim 9, which is characterized in that the cross section of the deflector is L-shaped.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910291929.7A CN110145794A (en) | 2019-04-12 | 2019-04-12 | A kind of method and burnt gas wall hanging furnace reducing wall-hung boiler discharged nitrous oxides |
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|---|---|---|---|
| CN201910291929.7A CN110145794A (en) | 2019-04-12 | 2019-04-12 | A kind of method and burnt gas wall hanging furnace reducing wall-hung boiler discharged nitrous oxides |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542201A (en) * | 2019-09-12 | 2019-12-06 | 珠海格力电器股份有限公司 | Wall-mounted stove |
Citations (7)
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| CN110542201A (en) * | 2019-09-12 | 2019-12-06 | 珠海格力电器股份有限公司 | Wall-mounted stove |
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