CN205480959U - Energy -concerving and environment -protective combustion system of solid fuel - Google Patents
Energy -concerving and environment -protective combustion system of solid fuel Download PDFInfo
- Publication number
- CN205480959U CN205480959U CN201620112321.5U CN201620112321U CN205480959U CN 205480959 U CN205480959 U CN 205480959U CN 201620112321 U CN201620112321 U CN 201620112321U CN 205480959 U CN205480959 U CN 205480959U
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- China
- Prior art keywords
- combustion
- burner hearth
- solid fuel
- flue gas
- environmental protection
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Abstract
The utility model discloses an energy -concerving and environment -protective combustion system of solid fuel, including furnace, a burning section of thick bamboo, fan coal pulverizer and fuel delivery pipe, set up the baffle in the furnace and fall into combustion area and heat absorption district with furnace set up minimum one on furnace's the lateral wall a burning section of thick bamboo, a burning section of thick bamboo with the furnace connection communicates with each other, furnace's top sets up an opening and is connected with first flue gas induction pipe, first flue gas induction pipe is connected with the fan coal pulverizer, the fan coal pulverizer is connected with the raw coal input tube, the delivery outlet of fan coal pulverizer pass through fuel delivery pipe with a burning section of thick bamboo is connected. The utility model discloses following beneficial effect has: be favorable to the buggy can low oxygen combustion, and burning that can be abundant, release high heating value, be favorable to accelerateing the burning of buggy and improving the burn -off rate, and be favorable to waste heat recovery, can ensure that pulverized coal combustion is complete, can reduce simultaneously the emission that exceedes 40% nitrogen oxide.
Description
[technical field]
This utility model relates to technical field of boiler combustion, improves burning effect particularly to one
Rate, effectively reduce discharged nitrous oxides solid fuel energy saving environmental protection combustion system.
[background technology]
Nitrogen oxides (nitrogen oxides) includes multiple compounds, such as nitrous oxide
(N2O), nitric oxide (NO), nitrogen dioxide (NO2), nitrogen trioxide (N2O3), four oxygen
Change phenodiazine (N2O4) and dinitrogen pentoxide (N2O5) etc..In addition to nitrogen dioxide, other nitrogen oxygen
The equal extremely unstable of compound, meets light, wet or heat becomes nitrogen dioxide and nitric oxide, nitric oxide
Become again nitrogen dioxide.Nitrogen oxides all has toxicity in various degree.
The NOx of human activity discharge, major part is from the combustion process of Fossil fuel, such as vapour
The combustion process of car, aircraft, internal combustion engine and Industrial Stoves；Also from producing, using nitric acid
Process, such as nitrogen fertilizer plant, organic intermediate factory, coloured and ferrous metal smelting factory etc..The whole world
Annual due to mankind's activity to the NOx of airborne release more than 60,000,000 tons.NOx is to environment
Detrimental effect is very big, and it is one of main matter forming acid rain, is also to form light in air
The important substance of chemical fumes and an important factor of consumption O3.
Nitrogen oxides can stimulate pulmonary, makes the respiratory system disease of people's more difficult opposing flu etc,
Respiratory system problematic personage such as asthmatics, can be easier to be affected by nitrogen dioxide.To youngster
For child, nitrogen oxides is likely to result in pulmonary and grows impaired.Research is pointed out to suck nitrogen oxygen for a long time
Compound may result in pulmonary's structural change, but still not can determine that the nitrogen causing this consequence aoxidizes
Thing content and suction gas time.
Industry mainly use reducing agent (ammonia, carbamide, alkane etc.) occur with nitrogen oxides
Chemical reaction neutralizes nitrogen oxides, the main selective catalytic reduction method of technique (SCR) and
SNCR methods (SNCR) etc., generate nitrogen after ammonia and reaction of nitrogen oxides
With water, thus reach non-pollution discharge.But process operations is complicated, and operating cost is the highest.
Existing coal-fired chain furnace includes burner hearth 1, be arranged in burner hearth 1 fire grate 4 and being arranged on
Chimney arch above fire grate 4, arranges raw coal conveyer belt 2 and former for being input into outside described burner hearth 1
The hopper 3 of coal.After raw coal is lighted on fire grate 4, heat is delivered up under the guiding of chimney arch.
In such structure, raw coal burns on fire grate, and ignition temperature ratio is relatively low, and burning time is short,
Raw coal is difficult to burning completely, and efficiency of combustion is low and nitrogen oxides in effluent content high, makes environment
Become severe contamination.
[utility model content]
This utility model purpose is the deficiency existed for above-mentioned prior art, it is provided that a kind of burning
Efficiency is high, and the solid fuel energy saving environmental protection burning effectively reducing discharge amount of nitrogen oxides is
System.
This utility model be the technical scheme is that a kind of solid fuel energy saving environmental protection burning is
System, is arranged including in burner hearth, combustion barrel, blower mill and fuel-supply pipe, described burner hearth
Burner hearth is divided into combustion zone and heat absorption district by dividing plate, arranges minimum of one heat conduction and lead on described dividing plate
Road make described combustion zone and heat absorption district communicate, described dividing plate is arcuate structure upwards, described in lead
The passage of heat is provided with two or more；The sidewall of described burner hearth is arranged and burns described in minimum of one
Cylinder, described combustion barrel is connected with described burner hearth and communicates；Described burner hearth be provided above an opening
Being connected with the first flue gas ingress pipe, described first flue gas ingress pipe is connected with blower mill, institute
Stating blower mill to be connected with raw coal input pipe, the delivery outlet of blower mill is carried by fuel
Pipe is connected with described combustion barrel, provides fuel for combustion barrel.
Described burner hearth each other relative to two sidewalls on be respectively arranged with described in minimum of one fire
Burn cylinder；Each described combustion barrel is connected with the sidewall of described burner hearth 1 and communicates.
Described combustion barrel deflection burner hearth rear portion, on the horizontal section of burner hearth, described combustion barrel
Angle axially and between the vertical line of burner hearth sidewall surface is 0-18 °, makes flame first spray backward
Penetrate, then return again under the swabbing action of former boiler induced-draft fan, combustion path can be extended,
Ensureing that burning is more abundant, fuel can after-flame.The outlet of described combustion barrel 17 is towards burner hearth
1 rear.
Arranging pilot cone in the fuel inlet of described combustion barrel, the drift angle of described pilot cone is 90
-120 °, for dispersion fuel, uniformly mix with combustion air, easily catch fire and burn
More abundant.
Inside the outlet of described combustion barrel, collar stop is set, makes exit inside diameter constriction to original
1/2-1/3, enables flame to circle round, and burns more abundant.
Described combustion barrel sidewall arranges two sidespin wind entrances, combustion-supporting gas by with sidespin air port
The combustion-supporting conduit connected carries out tangential air intake in combustion barrel, makes fuel the most mixed with combustion-supporting gas
In burning after conjunction, the flame that burning is formed is circling round with the bounce-back of collar stop collision rift.
Second blender, described second blender and second are installed on described first flue gas ingress pipe
Air leading-in conduit connects, and is used for importing air and first mixes with high-temperature flue gas, supplements partial oxidation,
Regulation oxygen content.
Described burner hearth lower rear arranges an opening and the second flue gas ingress pipe and connects, and described the
Two flue gas ingress pipes are connected with blender, and described blender is connected with air leading-in conduit, described mixed
The discharging port of clutch is connected with described combustion barrel sidewall by combustion-supporting conduit.
Arranging heat exchanger on smoke discharge pipe, combustion fan is connected with heat exchanger by pipeline,
Described heat exchanger is connected with blender by air leading-in conduit.
Compared with prior art, this utility model has the advantages that 1. employing high temperature
Flue gas mixes with raw coal and grinds coal dust, is fully warmed-up fuel, and beneficially coal dust can be low
Oxygen and sufficiently burning, discharges high heating value；2. it is highly suitable for original Industrial Boiler
Reducing energy consumption, improves existing boiler combustion efficiency；3. use part high-temperature hot flue gas and air
Mix combustion-supporting, be conducive to accelerating the burning of coal dust and improving burn-off rate, and beneficially waste heat recovery；
4. high in efficiency of combustion, temperature is high, and is fully to burn under hypoxia, it can be ensured that coal
Powder burning completely, can reduce by more than the discharge of the nitrogen oxides of 40% simultaneously.
[accompanying drawing explanation]
Fig. 1 is prior art construction schematic diagram；
Fig. 2 is the master of this utility model a kind of solid fuel energy saving environmental protection combustion system embodiment 1
TV structure schematic diagram；
Fig. 3 is bowing of this utility model a kind of solid fuel energy saving environmental protection combustion system embodiment 1
TV structure schematic diagram；
Fig. 4 is the master of this utility model a kind of solid fuel energy saving environmental protection combustion system embodiment 2
TV structure schematic diagram；
Fig. 5 is combustion barrel knot in this utility model one solid fuel energy saving environmental protection combustion system
Structure schematic diagram.
[detailed description of the invention]
Below in conjunction with the drawings and specific embodiments, this utility model is described in detail explanation.
Solid fuel energy saving environmental protection combustion system, as shown in Figures 2 and 3, including burner hearth 1,
Combustion barrel 17, blower mill 5 and fuel-supply pipe 18.Described burner hearth 1 sidewall is minimum to be set
Putting a described combustion barrel 17, described combustion barrel 17 is connected with described burner hearth 1 and communicates.Institute
State the front upper of burner hearth 1 and an opening is set and the first flue gas ingress pipe 7 connects, described
One flue gas ingress pipe 7 is connected with blower mill 5, and described blower mill 5 inputs with raw coal
Pipe 6 connects, and the delivery outlet of blower mill 5 is by fuel-supply pipe 18 and described combustion barrel
17 connect, and provide fuel for combustion barrel.Described burner hearth lower rear and the second flue gas ingress pipe
12 connect, and described second flue gas ingress pipe 12 is connected with blender 15, described blender 15
Being connected with air leading-in conduit, the discharging port of described blender is by combustion-supporting conduit and described combustion
Burn cylinder 17 sidewall to connect.Wherein, the air of importing is 1-3 with the volume ratio of the heat smoke of derivation:
2, make combustion air have suitable oxygen content, be conducive to burning.Preferably, the sky of importing
Gas is 3:2 with the volume ratio of the heat smoke of derivation, makes burning more abundant.Described combustion-supporting lead
The lateral of pipe 16 is connected with the tangent air inlet of described combustion barrel 17, can improve burning
Efficiency.Arranging heat exchanger 10 on smoke discharge pipe, combustion fan 11 is by pipeline and heat exchange
Device 10 connects, and described heat exchanger 10 is connected with blender 15 by air leading-in conduit.First will
Mix with heat smoke in inputting described blender 15 after combustion air preheating again, temperature after mixing
Can be 400 DEG C.
Preferably, described burner hearth 1 each other relative to two sidewalls on be respectively arranged with minimum one
Individual described combustion barrel 17；Each described combustion barrel 17 is connected with the sidewall of described burner hearth 1 and communicates.
Each described combustion barrel 17 is respectively by coal dust input pipe 18 and independent described blower mill
5 connect, and described blower mill 5 is by the first flue gas ingress pipe 7 with upper furnace even
Connect, be used for importing high-temperature flue gas.Wherein, described first flue gas ingress pipe 7 is provided with
One air-introduced machine 8, for drawing high-temperature flue gas.Wherein, the flue gas quoted and the quality of raw coal
Ratio is 2；1, effectively coal dust can be dried when grinding coal dust, preheat, improve combustion
Rate to the greatest extent.Described raw coal input pipe 6 is connected with coal bunker 3, can not change the pipeline of existing boiler
Arrange, be conducive to the transformation and upgrade to existing steam generator system.
Second blender 19, described second blender are installed on described first flue gas ingress pipe 7
19 are connected with the second air leading-in conduit 20, are used for importing air and first mix with high-temperature flue gas, mend
Fill partial oxidation, regulate oxygen content.Preferably, the air of introducing with the volume ratio of flue gas is
2-3:2, so can provide oxygen content of the most reasonably burning.Most preferably, the air of introducing with
The volume ratio of flue gas is 2.6:2, so can provide oxygen content of the most reasonably burning, permissible
While improving efficiency of combustion, effectively reduce the nitrogen oxides in discharge.
Wherein, on the horizontal section of burner hearth 1, the axial and burner hearth 1 of described combustion barrel 17
Angle between sidewall surfaces vertical line is 0-18 ° and is partial to burner hearth rear portion, makes flame the most backward
Injection, then fires back under the swabbing action of former boiler induced-draft fan again, can extend burning
Path, it is ensured that burning is more abundant, and fuel can after-flame.The outlet of described combustion barrel 17 to
Burner hearth 1 rear.Preferably, wherein, on the horizontal section of burner hearth 1, described combustion barrel
The angle axially and between the vertical line of burner hearth sidewall surface be 5-14 °.Most preferably, wherein,
On the horizontal section of burner hearth 1, axially hanging down with burner hearth 1 sidewall surfaces of described combustion barrel 17
Angle between straight line is 8-10 °,
As it is shown in figure 5, arrange pilot cone 171 in the fuel inlet of described combustion barrel 17, use
In dispersion fuel (coal dust and flue gas and the mixture of air), fuel and combustion air can be made
Uniformly mixing, is more prone to catch fire and burn more abundant.The drift angle of described pilot cone is 90
-120°.Preferably, the drift angle of described pilot cone is 105 °, disperses powder-gas mixture
For uniformly.Inside the outlet of described combustion barrel 17, collar stop 172 is set, in making outlet
Footpath constriction, to original 1/2-1/3, enables flame to circle round, and burns more abundant.Each described
Combustion barrel 17 sidewall arranges two sidespin wind entrances, and combustion-supporting gas is by being connected with sidespin air port
Combustion-supporting conduit 16 in combustion barrel 17, carry out tangential air intake, make fuel abundant with combustion-supporting gas
Burning after mixing, the thermal-flame that burning is formed is with the bounce-back convolution of collar stop collision rift more again
Enter burner hearth, it can be ensured that fuel burns.The connecting tube of each sidespin wind entrance arranges valve
Door 161, is used for regulating intake.
As shown in Figure 4, arrange in described burner hearth 1 dividing plate 14 burner hearth 1 is divided into combustion zone and
Heat absorption district 9, arranges minimum of one passage of heat 13 on described dividing plate 14 and makes described combustion zone
Communicate with heat absorption district 9.Dividing plate 14 can make the high-temp combustion flame in entrance combustion zone carry out
Fully superposition mixing stay long enough, is conducive to improving ignition temperature and making fuel fire
Burn more abundant.
This utility model can also described burner hearth 1 each other relative to two sidewalls on respectively
Being provided with two described combustion barrels 17, described combustion barrel 17 is connected with described burner hearth 1 and communicates.
The combustion barrel 17 installed on the relative sidewall of described burner hearth 1 is relative two sidewall centrages
It is symmetrical arranged, combustion barrel flame out so can be made to carry out mixing superposition, improve burning temperature
Degree, makes fuel combustion more abundant, prevents flame from directly washing away furnace wall simultaneously, extend burner hearth and make
Use the life-span.One opening is set in described heat absorption district 9 and the first flue gas ingress pipe 7 connects, institute
State the first flue gas ingress pipe 7 to be connected with blower mill 5, described blower mill 5 and raw coal
Input pipe 6 connects, and the delivery outlet of described blower mill 5 passes through fuel-supply pipe 18 and institute
State combustion barrel 17 to connect, provide fuel for combustion barrel 17.Wherein said first flue gas ingress pipe
First air-introduced machine 8 is installed on 7.Wherein, flue gas is 2:1 with the mass ratio of coal dust, permissible
Effectively coal dust is dried, preheats, improve burn-off rate.
Described dividing plate 14 is arcuate structure upwards, and described passage of heat can be provided with two
Above.Described passage of heat can arrange three, arranges in equilateral triangle.The side of described burner hearth
It is provided with pilot cone in the introducing port that wall is connected with described combustion barrel, is used for disperseing heat origin,
Make burning more uniformly fully.
Described blower mill 5 predominantly coal-burning boiler provides qualified coal dust, its collection is dried,
Powder process and defeated powder three zones are integrated, and are mainly used in grinding the mixed of brown coal, oil shale and brown coal
Coal or high-volatile, the bituminous coal of high moisture content.It is mainly by casing, striker wheel, separator, axle
Hold case and the part composition such as cooling and lubricating system and mair motor thereof.
Raw coal enters coal bunker 3 through conveyer belt 2, is then passed through raw coal input pipe 6 and enters fan
In coal pulverizer 5；High-temperature flue gas in the burner hearth extracted out by the first air-introduced machine 8 is through the first flue gas
Ingress pipe 7 the second blender 19 mix with air laggard enter in blower mill 5, with former
After coal mixing and be milled into as coal dust and flue gas and the mixture of air, through fuel-supply pipe
18 enter ignition in combustion barrel 17.Combustion air enters under the effect of combustion fan 11
Enter after heat exchanger 10 is heated to 100 DEG C entrance blender 15, in blender 15 with from
The high-temperature flue gas mixing of the second flue gas ingress pipe 12, forming temperature is 400 DEG C mix uniformly
Close high temperature combustion-supporting gas, more tangentially enter in combustion barrel 17 through combustion-supporting conduit 16 and fill with coal dust
Divide mixed combustion, form high-temperature low-oxygen flame and enter the combustion zone of burner hearth 1；Lead to through heat conduction again
Road 13 enters burner hearth heat absorption district 9, after extract out by the original air-introduced machine of boiler through heat exchanger 10
Enter in air.
Preferred embodiment of the present utility model described in detail above, it will be appreciated that ability
The ordinary skill in territory just can be made all according to design of the present utility model without creative work
Many modifications and variations.Therefore, all technical staff in the art exist according to this utility model design
By logical analysis, reasoning or available according to limited experiment on the basis of prior art
Technical scheme, all should be among by protection domain determined by the claims.
Claims (9)
1. a solid fuel energy saving environmental protection combustion system, including burner hearth, combustion barrel, fan
Coal pulverizer and fuel-supply pipe, it is characterised in that: in described burner hearth, dividing plate is set burner hearth is divided into
Combustion zone and heat absorption district, arrange minimum of one passage of heat on described dividing plate and make described combustion zone
Communicating with heat absorption district, described dividing plate is arcuate structure upwards, and described passage of heat is provided with two
More than individual；The sidewall of described burner hearth arranges combustion barrel described in minimum of one, described combustion barrel
It is connected with described burner hearth and communicates；Be provided above an opening and first flue gas of described burner hearth import
Pipe connect, described first flue gas ingress pipe is connected with blower mill, described blower mill and
Raw coal input pipe connects, and the delivery outlet of blower mill is by fuel-supply pipe and described combustion barrel
Connect.
2. a kind of solid fuel energy saving environmental protection combustion system as claimed in claim 1, it is special
Levy and be: described burner hearth each other relative to two sidewalls on be respectively arranged with described in minimum of one
Combustion barrel；Each described combustion barrel is connected with the sidewall of described burner hearth and communicates.
3. a kind of solid fuel energy saving environmental protection combustion system as claimed in claim 2, it is special
Levy and be: described combustion barrel deflection burner hearth rear portion, on the horizontal section of burner hearth, described burning
The angle axially and between the vertical line of burner hearth sidewall surface of cylinder is 0-18 °.
4. a kind of solid fuel energy saving environmental protection combustion system as claimed in claim 3, it is special
Levying and be: arrange pilot cone in the fuel inlet of described combustion barrel, the drift angle of described pilot cone is
90-120°。
5. a kind of solid fuel energy saving environmental protection combustion system as claimed in claim 4, it is special
Levy and be: inside the outlet of described combustion barrel, collar stop is set, make exit inside diameter constriction to former
The 1/2-1/3 come.
6. a kind of solid fuel energy saving environmental protection combustion system as claimed in claim 5, it is special
Levy and be: described combustion barrel sidewall arranges two sidespin wind entrances, combustion-supporting gas by with sidespin
The combustion-supporting conduit that air port connects carries out tangential air intake in combustion barrel.
7. a kind of solid fuel energy saving environmental protection combustion system as claimed in claim 2, it is special
Levy and be: the second blender is installed on described first flue gas ingress pipe, described second blender with
Second air leading-in conduit connects.
8. a kind of solid fuel energy saving environmental protection combustion system as claimed in claim 2, it is special
Levy and be: described burner hearth lower rear arranges an opening and the second flue gas ingress pipe connects, institute
Stating the second flue gas ingress pipe to be connected with blender, described blender is connected with air leading-in conduit, institute
The discharging port stating blender is connected with described combustion barrel sidewall by combustion-supporting conduit.
9. a kind of solid fuel energy saving environmental protection combustion system as claimed in claim 8, it is special
Levying and be: arrange heat exchanger on smoke discharge pipe, combustion fan is by pipeline with heat exchanger even
Connecing, described heat exchanger is connected with blender by air leading-in conduit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016200950776 | 2016-01-29 | ||
| CN201620095077 | 2016-01-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205480959U true CN205480959U (en) | 2016-08-17 |
Family
ID=56674014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620112321.5U Expired - Fee Related CN205480959U (en) | 2016-01-29 | 2016-02-03 | Energy -concerving and environment -protective combustion system of solid fuel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205480959U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984502A (en) * | 2021-01-27 | 2021-06-18 | 杭州聚能环保科技股份有限公司 | Micro-discharge pulverized coal combustion system |
-
2016
- 2016-02-03 CN CN201620112321.5U patent/CN205480959U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984502A (en) * | 2021-01-27 | 2021-06-18 | 杭州聚能环保科技股份有限公司 | Micro-discharge pulverized coal combustion system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20190203 |