CN207980839U - Biomass gasification fired denitrification apparatus - Google Patents
Biomass gasification fired denitrification apparatus Download PDFInfo
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- CN207980839U CN207980839U CN201721899568.7U CN201721899568U CN207980839U CN 207980839 U CN207980839 U CN 207980839U CN 201721899568 U CN201721899568 U CN 201721899568U CN 207980839 U CN207980839 U CN 207980839U
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- gas outlet
- secondary air
- air duct
- biomass gasification
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Abstract
The utility model discloses a kind of biomass gasification fired denitrification apparatus, gas outlet including biomass gasification fired boiler, guide shell is arranged in the inner wall of gas outlet, simultaneously eddy flow tray is arranged in the exit of secondary air duct in the outer wall setting secondary air duct of gas outlet, gas outlet is connected to taper fire door, the exit of the secondary air duct also sets up several nozzles, and nozzle is communicated with the inlet tube for inputting urea liquid.Urea liquid can fully, be uniformly mixed into combustion product gases, with nitrogen oxides (NOX) react, there is unmixing flue gas Escape Probability very little, mixing ratio is high, and the probability that abundant reduction reaction occurs is big, thus greatly reduces nitrogen oxides in effluent (NOX) content, keep discharge more environmentally friendly.
Description
Technical field
The utility model belongs to gasification of biomass corollary equipment, and biomass is used more particularly to oil-burning gas-fired boiler ontology
The device of gasification burning denitration burning.
Background technology
The cost of the fuel of oil-burning gas-fired boiler consumption at present is relatively high, and part oil-burning gas-fired boiler is transformed into burning biology
Matter gasification burning is to reduce cost.Since the fuel of biomass itself contains nitrogen, a large amount of nitrogen oxygen can be generated at high temperature
Compound (NOX), cause flue gas emission not up to standard.In order to reduce nitrogen oxides (NOX) discharge, effective method is to take at present
The way of air distribution control oxygen content is reduced, but the result is that nitrogen oxides decreases, because of oxygen debt burning, in final discharge flue gas
Carbon monoxide (CO) can increase at multiple, cause combustion loss big, the inadequate phenomenon of boiler output, in some areas pair oxygen
Change carbon (CO) discharge it is also conditional in the case of, flue gas emission is not equally up to standard.
Utility model content
The utility model in order to solve the problems, such as it is above-mentioned exist, the utility model is in a kind of adapted biomass gasification, and combustion
Reduce the denitrification apparatus for generating nitrogen oxides.
In order to achieve the goal above, the technical scheme adopted by the utility model is that being implemented：A kind of gasification of biomass
Combustion denitration device includes the gas outlet of biomass gasification fired boiler, and guide shell is arranged in the inner wall of gas outlet, and combustion gas goes out
Simultaneously eddy flow tray is arranged in the exit of secondary air duct in the outer wall setting secondary air duct of mouth, and gas outlet is connected to taper fire door, described
The exit of secondary air duct also sets up several nozzles, and nozzle is communicated with the inlet tube for inputting urea liquid.
Further, inlet tube structure in a ring.
Compared with prior art, urea liquid can fully, be uniformly mixed into combustion product gases in the utility model, with nitrogen oxygen
Compound (NOX) react, there is unmixing flue gas Escape Probability very little, mixing ratio is high, and the machine of abundant reduction reaction occurs
Rate is big, thus greatly reduces nitrogen oxides in effluent (NOX) content, keep discharge more environmentally friendly.
The characteristics of the utility model：
1, the nozzle that urea (or ammonium hydroxide) solution is installed in the position of biomass gasification burning discharge swirl disk, in a level pressure
Make urea (or ammonium hydroxide) solution jet atomization under power and mixed with the flue gas of burning under the agitation of eddy flow tray with Secondary Air,
It is more fully mixed in this way, uniformly, accordingly increases the contact area of atomized drop and flue gas molecule.
2, the abundant burning to be jetted out flames using the boiler applied to fuel-firing gas-firing can guarantee that urea (or ammonium hydroxide) solution exists
It is easy to get one and nitrogen oxides (NO during thisX) reaction temperature window (850-1050 DEG C)：That is in certain fire
Total in the long and narrow range of flame length there are one area or temperature is to adapt to urea (or ammonium hydroxide) solution and nitrogen oxides (NOX) reaction
, flame temperature can guarantee that urea (or ammonium hydroxide) solution of penetrating reacts completely, be not in the escaping of ammonia phenomenon.
3, solve the problems, such as that traditional denitration is difficult to the reconnaissance of reaction temperature window in boiler furnace, as long as this method is in eddy flow
Disk position distribution nozzle can reach ideal denitration effect.
4, denitration effect is not influenced by boiler load size, no matter boiler load size, it is total during hearth combustion
The temperature in one region is to be suitble to urea (or ammonium hydroxide) solution and nitrogen oxides (NOX) reaction.
5, using selective non-catalytic reduction technology (SNCR) denitration, cost is relatively low, and be circular layout nozzle in eddy flow tray,
Efficiency is better than 50% efficiency of conventional selective non-catalytic reduction technology (SNCR) denitration up to 80% or more.In low cost
Under conditions of substantially achieved the denitration efficiency of SCR technology (NCR).
Description of the drawings
Fig. 1 is the structural schematic diagram of biomass gasification fired denitrification apparatus.
Fig. 2 is the distribution map of nozzle.
Specific implementation mode
As depicted in figs. 1 and 2, biomass gasification fired denitrification apparatus include vaporizer 1, gas outlet 2, secondary air duct 3,
Guide shell 9, eddy flow tray 10, nozzle 4, inlet tube 5, taper fire door 7, flue 8 (burner hearth) etc..
Guide shell 9 is set in the gas outlet 2 of vaporizer 1.Guide shell 9 is arranged in the inner wall of gas outlet 2, guide shell 9
Madial wall offers several diversion trenches being laid out in a ring 9.1.Secondary air duct 3, secondary air duct is arranged in the outer wall of gas outlet 2
3 exit setting eddy flow tray 10 and nozzle 4, gas outlet 2 are connected to taper fire door 7 and boiler furnace flue 8, and nozzle 4 is connected to feed liquor
Pipe 5.Structure, inlet tube are connected to 4-6 isocon 6,6 assembling nozzle 4 of isocon to inlet tube in a ring.
Urea (or ammonium hydroxide) solution of denitration after pressurization enters nozzle 4 by the isocon 6 of inlet tube 5.Denitration urea (or
Ammonium hydroxide) solution passes through nozzle 4 and generates atomization under pressure, and as the direction of flue gas is to boiler in the taper fire door 7
8 diffusion in flue.Under eddy flow of the Secondary Air from secondary air duct 3 by eddy flow tray 10, the solution to nozzle atomization and gasification flue gas
Generate eddy flow, agitation, immixture.The combustion of (burner hearth) 8 in burner hearth after denitration urea (or ammonium hydroxide) solution is mixed with combustible fumes
It burns, in combustion process when reaching temperature window (850-1050 DEG C), the nitrogen in urea (or ammonium hydroxide) solution and nitrogen oxides (NOX)
It reacts, by the nitrogen oxides (NO in flue gasX)It is reduced into nitrogen and moisture content is discharged with flue gas, to reach reduction nitrogen oxidation
Object (NOX) purpose.
Claims (2)
1. a kind of biomass gasification fired denitrification apparatus, includes the gas outlet of biomass gasification fired boiler, gas outlet
Guide shell is arranged in inner wall, and simultaneously eddy flow tray, combustion gas is arranged in the exit of secondary air duct in the outer wall setting secondary air duct of gas outlet
Outlet taper fire door, it is characterised in that：The exit of the secondary air duct also sets up several nozzles, and nozzle connection is useful
In the inlet tube of input urea liquid.
2. biomass gasification fired denitrification apparatus according to claim 1, which is characterized in that the inlet tube is tied in a ring
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721899568.7U CN207980839U (en) | 2017-12-29 | 2017-12-29 | Biomass gasification fired denitrification apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721899568.7U CN207980839U (en) | 2017-12-29 | 2017-12-29 | Biomass gasification fired denitrification apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207980839U true CN207980839U (en) | 2018-10-19 |
Family
ID=63818416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721899568.7U Active CN207980839U (en) | 2017-12-29 | 2017-12-29 | Biomass gasification fired denitrification apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207980839U (en) |
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2017
- 2017-12-29 CN CN201721899568.7U patent/CN207980839U/en active Active
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