CN204114923U - A kind of coal-firing device of low emission - Google Patents
A kind of coal-firing device of low emission Download PDFInfo
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- CN204114923U CN204114923U CN201420556873.6U CN201420556873U CN204114923U CN 204114923 U CN204114923 U CN 204114923U CN 201420556873 U CN201420556873 U CN 201420556873U CN 204114923 U CN204114923 U CN 204114923U
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- coal
- reactor
- burner
- pyrolysis
- air inlet
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Abstract
The utility model relates to a kind of coal-firing device of low emission, a kind of coal-firing device of low emission, comprise pyrolysis installation, the bottom of pyrolysis installation is connected with burner by carrier pipe, the top of pyrolysis installation is connected with reactor air inlet, another air inlet of reactor communicates with the gas outlet of burner, and the gas outlet of reactor communicates with burner air inlet, and the solid outlet of reactor is connected with sulfur condenser.The utility model, by means of only the adjustment of coal combustion process and tissue, realizes low SO
2, NO
x, Hg discharge coal combustion method, reduce SO from the source of combustion process
2, NO
x, Hg concentration of emission.
Description
Technical field
The utility model relates to a kind of novel low SO
2, NO
x, Hg discharge coal-firing device, particularly realized the new method controlled in pollution that caused by coal burning thing combustion process by the adjustment of coal combustion process and rationalization, belong to environmental protection technical field.
Background technology
According to statistics, nearly 4,000,000,000 tons of current China annual coal consumption amount, wherein nearly 50% for various burner.The SO generated after coal combustion
2, NO
x, dust etc. is the major pollutants affecting PM2.5 concentration in air.These three gross contamination emissions of China about 2,044 ten thousand tons, 2,227 ten thousand tons and 1,500 ten thousand tons respectively in 2013, all occupy the first in the world, have discharged the mercury of millions of tons simultaneously.Coal-burning boiler is one of atmosphere pollution major source, and along with country is to the progressively raising of the pay attention to day by day of environmental protection and pollutant emission standard, the task of controlling discharged from coal-fired boiler will be more and more arduous, and pollutant catabolic gene cost is more and more higher.
Flue gas desulfurization after burning, denitration control coal-burning boiler SO
2, NO
xthe main path of discharge, usually arranges independently desulphurization and denitration device respectively at present and controls, and not only investment operating cost is huge, and consumes large quantities of lime stone, NH
3etc. resource.And for the Hg that fire coal generates, the general method of charcoal absorption that adopts controls its discharge.As patent CN101422691A discloses a kind of coal-fired flue-gas multi-pollutant removing technique and equipment thereof.This technique first removes the NO in flue gas by SCR denitration method
x, secondly remove the dust soot particle in flue gas with deduster, the SO in then removing smoke by wet type calcium-based desulfurization method
2, then absorb the CO in flue gas by MEA carbon rejection processes
2, generated alkanolamine solution rich solution is added Thermal desorption regeneration, gained alkanolamine solution lean solution continues to recycle, the high concentration CO parsed simultaneously
2gas, then through supercooling, gas-liquid separation, drying, compression and condensation process, makes high-purity technical class liquid CO 2.Be exactly arrange independently desulphurization and denitration device respectively to control, investment operating cost is huge.
Regulation in " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011) that Environmental Protection Department is issued for 2011, from 1 day July in 2014, all more than 65t/h coal-fired electric generation furnaces performed 100mg/m
3(newly-built)/200mg/m
3the SO of (having)
2discharge standard, 100mg/m
3nO
xdischarge standard, from 1 day January in 2015, performs 0.03mg/m
3hg discharge standard.The performance of raising to existing thermal power plant desulphurization and denitration device of discharge standard proposes stricter requirement, needs the discharge taking measures to control Hg in flue gas simultaneously.
Utility model content
The utility model, for above-mentioned deficiency, proposes a kind of coal-firing device of low emission, does not consume external resource, by means of only adjustment and the tissue of coal combustion process, realizes low SO
2, NO
x, Hg discharge coal combustion method, reduce SO from the source of combustion process
2, NO
x, Hg concentration of emission, and then reduce the operating cost of tail flue gas pollutant removing.
The technical scheme that the utility model is taked is:
A kind of coal-firing device of low emission, comprise pyrolysis installation, the bottom of pyrolysis installation is connected with burner by carrier pipe, the top of pyrolysis installation is connected with reactor air inlet, another air inlet of reactor communicates with the gas outlet of burner, the gas outlet of reactor communicates with burner air inlet, and the solid outlet of reactor is connected with sulfur condenser.
First part coal or whole coal are carried out high temperature pyrolysis, pyrolysis temperature interval is 300 DEG C-700 DEG C, and the part sulphur in pyrolytic process in coal is with H
2s separates out, and the coal after pyrolysis and coal tar are sent in burner and burnt, and in coal, remaining element sulphur generates SO in combustion
2, or the coal after remainder coal and pyrolysis and coal tar to be sent in burner one piece and burn and generate SO
2, the SO of production
2with the H separated out
2s is admitted to reaction in catalysis or uncatalyzed reaction device and produces elemental sulfur realization from desulfurization, Hg in the part sulphur simple substance generated and flue gas reacts and generates HgS, realize coal combustion from demercuration process, remaining sulphur simple substance generates liquid sulfur by sulfur condenser, purified gas again passes into burner correct position and burns, and realizes the denitration by refueling of pyrolysis gas.
Reaction temperature interval in described catalytic reactor is 170 DEG C-350 DEG C, and in described uncatalyzed reaction device, temperature range is 0 DEG C-300 DEG C.
By reaction 2H in reactor
2s+SO
2=3S+2H
2o generates simple substance S, therefore should strictly control flue gas flow and make H
2s and SO
2mol ratio be 2:1.
The beneficial effects of the utility model are: under the condition of not losing combustible component in coal, by SO in coal combustion process
2, NOx, Hg effectively control, and realizes the low SO of coal combustion
2, low NOx and low Hg discharges.The present invention is by being improved the low SO realizing coal combustion to existing coal-burning installation
2, NOx, Hg discharge, without the need to additional absorbent agent or additive, there is the advantages such as cost is low, economy, environmental protection, compared with traditional desulfurization denitration demercuration mode, there is very high economy.The present invention is applicable to the coal-burning installation such as coal-burning boiler, stove.
Accompanying drawing explanation
The coal-firing device of low emission when Fig. 1 is the pyrolysis of coal of the utility model part;
The coal-firing device of low emission when Fig. 2 is the utility model whole pyrolysis of coal.
Wherein, 1. pyrolysis installation, 2. burner, 3. reactor, 4. sulfur condenser, 5. coal.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described further.
A kind of coal-firing device of low emission, comprise pyrolysis installation 1, the bottom of pyrolysis installation 1 is connected with burner 2 by carrier pipe, the top of pyrolysis installation 1 is connected with an air inlet of reactor 3, another air inlet of reactor 3 communicates with the gas outlet of burner 2, the gas outlet of reactor 3 communicates with burner 2 air inlet, and the solid outlet of reactor 3 is connected with sulfur condenser 4.
Embodiment 1
As shown in Figure 1, coal-fired before passing into burner, some coal first passes into pyrolysis reactor and carries out high temperature pyrolysis device, and temperature range is 300 DEG C-700 DEG C, and actual temp is determined by coal and sulfur content.The pyrolysis of coal occurs in pyrolysis reactor, and the cinder after pyrolysis and coal tar directly pass into burner, and pyrolysis gas passes into catalytic reactor.Meanwhile, also some passes into catalytic reactor to the flue gas in burner after coal combustion, and react in catalytic reactor 2H
2s+SO
2=3S+2H
2o, generates simple substance S, control H
2s and SO
2mol ratio be 2:1, the Hg in the S simultaneously generated and flue gas reacts Hg+S=HgS, and generate HgS, remaining S generates liquid sulfur by sulfur condenser.Purified gas again passes into burner hearth correct position and burns, and realizes the denitration by refueling of pyrolysis gas, and after denitration by refueling, flue gas enters downstream flue.
Embodiment 2
As shown in Figure 2, fire coal all passes into pyrolysis reactor and carries out high temperature pyrolysis device, and temperature range is 300 DEG C-700 DEG C, and actual temp is determined by coal and sulfur content.The pyrolysis of coal occurs in pyrolysis reactor, and the cinder after pyrolysis and coal tar directly pass into burner, and pyrolysis gas passes into reactor.Meanwhile, also some passes into reactor to the flue gas in burner after coal combustion, and react in reactor 2H
2s+SO
2=3S+2H
2o, generates simple substance S, control H
2s and SO
2mol ratio be 2:1, Hg a small amount of in the S simultaneously generated and flue gas reacts Hg+S=HgS, and generate HgS, remaining S generates liquid sulfur by sulfur condenser.Tail gas after reactor again passes into burner correct position and carries out fractional combustion, and realize the classification denitration by refueling of pyrolysis gas, the flue gas after burning finally passes into other smoke eliminator.
Claims (1)
1. the coal-firing device of a low emission, it is characterized in that, comprise pyrolysis installation, the bottom of pyrolysis installation is connected with burner by carrier pipe, the top of pyrolysis installation is connected with reactor air inlet, another air inlet of reactor communicates with the gas outlet of burner, and the gas outlet of reactor communicates with burner air inlet, and the solid outlet of reactor is connected with sulfur condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420556873.6U CN204114923U (en) | 2014-09-25 | 2014-09-25 | A kind of coal-firing device of low emission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420556873.6U CN204114923U (en) | 2014-09-25 | 2014-09-25 | A kind of coal-firing device of low emission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204114923U true CN204114923U (en) | 2015-01-21 |
Family
ID=52332229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420556873.6U Expired - Fee Related CN204114923U (en) | 2014-09-25 | 2014-09-25 | A kind of coal-firing device of low emission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204114923U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197319A (en) * | 2014-09-25 | 2014-12-10 | 山东大学 | Low-emission coal combustion method and device |
-
2014
- 2014-09-25 CN CN201420556873.6U patent/CN204114923U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197319A (en) * | 2014-09-25 | 2014-12-10 | 山东大学 | Low-emission coal combustion method and device |
| CN104197319B (en) * | 2014-09-25 | 2016-06-29 | 山东大学 | A kind of coal combustion method of low emission and device |
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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 |
Granted publication date: 20150121 Termination date: 20200925 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |