CN104197319B - A kind of coal combustion method of low emission and device - Google Patents
A kind of coal combustion method of low emission and device Download PDFInfo
- Publication number
- CN104197319B CN104197319B CN201410497891.6A CN201410497891A CN104197319B CN 104197319 B CN104197319 B CN 104197319B CN 201410497891 A CN201410497891 A CN 201410497891A CN 104197319 B CN104197319 B CN 104197319B
- Authority
- CN
- China
- Prior art keywords
- coal
- pyrolysis
- sulfur
- burner
- combustion method
- 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.)
- Active
Links
Landscapes
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of coal combustion method of low emission and device, first part coal or whole coal are carried out high temperature pyrolysis, in pyrolytic process, the part sulfur in coal is with H2S precipitates out, and coal and coal tar after pyrolysis send into burning in burner, and in coal, remaining element sulphur generates SO in combustion2, or the coal after remainder coal and pyrolysis and coal tar are sent into one piece of burning generation SO in burner2, the SO of production2With the H precipitated out2S is admitted in reactor and reacts produces elemental sulfur, and part sulfur simple substance and the Hg in flue gas of generation reacts generation HgS, and remaining sulfur simple substance generates liquid sulfur by sulfur condenser, and purified gas again passes into burner correct position and burns.The present invention is only by the adjustment of coal combustion process and tissue, it is achieved low SO2、NOx, Hg discharge coal combustion method, from the source of combustion process reduce SO2、NOx, Hg concentration of emission.
Description
Technical field
The present invention relates to a kind of novel low SO2、NOx, the coal combustion method of Hg discharge and device, realize the new method controlled in pollution that caused by coal burning thing combustion process especially by adjustment and the rationalization of coal combustion process, 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% is used for various burners.The SO generated after coal combustion2、NOx, dust etc. be affect the major pollutants of PM2.5 concentration in air.These three gross contamination emissions of China about 20,440,000 tons, 22,270,000 tons and 15,000,000 tons respectively in 2013, all occupy the first in the world, have discharged the hydrargyrum of millions of tons simultaneously.Coal-burning boiler is one of atmospheric pollution major source, and along with country to the pay attention to day by day of environmental protection and stepping up of 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 are to control coal-burning boiler SO2、NOxThe main path of discharge, is generally respectively provided with independent desulphurization and denitration device at present and is controlled, and not only investment operating cost is huge, and consumes large quantities of lime stone, NH3Etc. resource.And for the Hg that fire coal generates, the method being generally adopted activated carbon adsorption controls its discharge.A kind of coal-fired flue-gas multi-pollutant removing technique and equipment thereof is disclosed such as patent CN101422691A.This technique is first with the NO in SCR denitration method elimination flue gasX, secondly remove the dust soot particle in flue gas, the SO in then removing smoke by wet type calcium-based desulfurization method with cleaner unit2, then absorb the CO in flue gas by MEA carbon rejection processes2, the alkanolamine solution rich solution generated is added Thermal desorption regeneration simultaneously, gained alkanolamine solution lean solution continues cycling through use, the high concentration CO parsed2Gas then through supercooling, gas-liquid separation, dry, compression and condensation process, makes high-purity technical class liquid CO 2.Being exactly be respectively provided with independent desulphurization and denitration device to be controlled, 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/m3(newly-built)/200mg/m3The SO of (having)2Discharge standard, 100mg/m3NOxDischarge standard, from 1 day January in 2015, performs 0.03mg/m3Hg discharge standard.The performance to existing thermal power plant desulphurization and denitration device that improves of discharge standard proposes tightened up requirement, simultaneously need to take measures to control the discharge of Hg in flue gas.
Summary of the invention
The present invention is directed to above-mentioned deficiency, it is proposed that a kind of coal combustion method of low emission and device, do not consume external resource, only by the adjustment of coal combustion process and tissue, it is achieved low SO2、NOx, Hg discharge coal combustion method, from the source of combustion process reduce SO2、NOx, Hg concentration of emission, and then reduce tail flue gas pollutant removing operating cost.
The technical scheme that the present invention takes is:
A kind of coal combustion method of low emission, first carries out high temperature pyrolysis by part coal or whole coal, and pyrolysis temperature interval is 300 DEG C 700 DEG C, and in pyrolytic process, the part sulfur in coal is with H2S precipitates out, and coal and coal tar after pyrolysis send into burning in burner, and in coal, remaining element sulphur generates SO in combustion2, or the coal after remainder coal and pyrolysis and coal tar are sent into one piece of burning generation SO in burner2, the SO of production2With the H precipitated out2S is admitted in catalysis or uncatalyzed reaction device and reacts produces elemental sulfur realization from desulfurization, the part sulfur simple substance generated and the Hg in flue gas react generation HgS, realize coal combustion from demercuration process, remaining sulfur simple substance generates liquid sulfur by sulfur condenser, purified gas again passes into burner correct position and burns, it is achieved 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 reacting 2H in reactor2S+SO2=3S+2H2O generates simple substance S, therefore should strictly control flue gas flow and make H2S and SO2Mol ratio be 2:1.
A kind of coal-firing device of low emission, including pyrolysis installation, the bottom of pyrolysis installation is connected with burner by carrying 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.
The invention has the beneficial effects as follows: when not losing combustible component in coal, by SO in coal combustion process2, NOx, Hg effectively control, it is achieved the low SO of coal combustion2, low NOx and low Hg discharge.The present invention can pass through existing coal-burning installation is improved the low SO realizing coal combustion2, NOx, Hg discharge, it is not necessary to additional absorbent agent or additive, there is the advantages such as cost is low, economy, environmental protection, compared with tradition desulfurization denitration demercuration mode, there is significantly 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 part pyrolysis of coal of the present invention；
The coal-firing device of low emission when Fig. 2 is the present invention 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 present invention will be further described.
A kind of coal-firing device of low emission, including pyrolysis installation 1, the bottom of pyrolysis installation 1 is connected with burner 2 by carrying 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
A kind of coal combustion method (coal-fired partial thermal decomposition) of low emission: device is as shown in Figure 1, coal-fired before passing into burner, some coal first passes into pyrolysis reactor and carries out high temperature pyrolysis, 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 cinder and coal tar after pyrolysis are passed directly into burner, and pyrolysis gas passes into catalytic reactor.Meanwhile, in burner, also some passes into catalytic reactor for flue gas after coal combustion, and react in catalytic reactor 2H2S+SO2=3S+2H2O, generates simple substance S, controls H2S and SO2Mol ratio be 2:1, the Hg in the S being simultaneously generated and flue gas reacts Hg+S=HgS, generates HgS, and remaining S generates liquid sulfur by sulfur condenser.Purified gas again passes into burner hearth correct position and burns, it is achieved the denitration by refueling of pyrolysis gas, and after denitration by refueling, flue gas enters downstream flue.
Embodiment 2
A kind of coal combustion method (coal-fired all pyrolysis) of low emission: device carries out high temperature pyrolysis as in figure 2 it is shown, fire coal all passes into pyrolysis reactor, 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 cinder and coal tar after pyrolysis are passed directly into burner, and pyrolysis gas passes into reactor.Meanwhile, in burner, also some passes into reactor for flue gas after coal combustion, and react in reactor 2H2S+SO2=3S+2H2O, generates simple substance S, controls H2S and SO2Mol ratio be 2:1, Hg a small amount of in the S being simultaneously generated and flue gas reacts Hg+S=HgS, generates HgS, and remaining S generates liquid sulfur by sulfur condenser.Tail gas after reactor again passes into burner correct position and carries out fractional combustion, it is achieved the classification denitration by refueling of pyrolysis gas, the flue gas after burning finally passes into other smoke eliminator.
Claims (4)
1. a coal combustion method for low emission, is characterized in that, first part coal or whole coal is carried out high temperature pyrolysis, and pyrolysis temperature interval is 300 DEG C 700 DEG C, and in pyrolytic process, the part sulfur in coal is with H2S precipitates out, and coal and coal tar after pyrolysis send into burning in burner, and in coal, remaining element sulphur generates SO in combustion2, or the coal after remainder coal and pyrolysis and coal tar are sent into one piece of burning generation SO in burner2, the SO of production2With the H precipitated out2S is admitted in catalysis or uncatalyzed reaction device and reacts produces elemental sulfur realization from desulfurization, the part sulfur simple substance generated and the Hg in flue gas react generation HgS, realize coal combustion from demercuration process, remaining sulfur simple substance generates liquid sulfur by sulfur condenser, purified gas again passes into burner correct position and burns, it is achieved the denitration by refueling of pyrolysis gas.
2. the coal combustion method of a kind of low emission according to claim 1, is characterized in that, the reaction temperature interval in described catalytic reactor is 170 DEG C-350 DEG C.
3. the coal combustion method of a kind of low emission according to claim 1, is characterized in that, in described uncatalyzed reaction device, temperature range is 0 DEG C-300 DEG C.
4. the coal combustion method of a kind of low emission according to claim 1, is characterized in that, controls flue gas flow and makes H2S and SO2Mol ratio be 2:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410497891.6A CN104197319B (en) | 2014-09-25 | 2014-09-25 | A kind of coal combustion method of low emission and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410497891.6A CN104197319B (en) | 2014-09-25 | 2014-09-25 | A kind of coal combustion method of low emission and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104197319A CN104197319A (en) | 2014-12-10 |
| CN104197319B true CN104197319B (en) | 2016-06-29 |
Family
ID=52082651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410497891.6A Active CN104197319B (en) | 2014-09-25 | 2014-09-25 | A kind of coal combustion method of low emission and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104197319B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106390716A (en) * | 2016-11-10 | 2017-02-15 | 山东大学 | Flue gas demercuration system and method |
| CN108203611B (en) * | 2018-01-18 | 2019-10-25 | 山东大学 | A kind of preceding system and method using the pre- desulfuration demercuration of smoke gas pyrolysis of medium-high sulfur coal combustion |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4427642A (en) * | 1979-03-23 | 1984-01-24 | Babcock-Hitachi Kabushiki Kaisha | Process for dry desulfurization of flue gas |
| EP0212297B1 (en) * | 1985-07-22 | 1991-02-27 | Air Products And Chemicals, Inc. | High pressure process for sulfur recovery from a hydrogen sulfide containing gas stream |
| CN1155874A (en) * | 1995-05-30 | 1997-07-30 | 埃尔夫·阿奎坦生产公司 | Catalytic desulphurization process for a gas containing H2S and SO2 compounds, and catalyst for impelementing said process |
| JP2001270706A (en) * | 2000-03-27 | 2001-10-02 | Jgc Corp | Method for recovering sulfur from gas containing hydrogen sulfide, and sulfur recovering apparatus |
| CN201241071Y (en) * | 2008-03-25 | 2009-05-20 | 东南大学 | Single-bed self-heating type thermal decomposition gasification combusting reactor |
| CN202191843U (en) * | 2011-08-29 | 2012-04-18 | 山西阳煤丰喜肥业(集团)有限责任公司 | Desulfurizing device for low-concentration acidic gases containing H2S (hydrogen sulfide) |
| CN204114923U (en) * | 2014-09-25 | 2015-01-21 | 山东大学 | A kind of coal-firing device of low emission |
-
2014
- 2014-09-25 CN CN201410497891.6A patent/CN104197319B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4427642A (en) * | 1979-03-23 | 1984-01-24 | Babcock-Hitachi Kabushiki Kaisha | Process for dry desulfurization of flue gas |
| EP0212297B1 (en) * | 1985-07-22 | 1991-02-27 | Air Products And Chemicals, Inc. | High pressure process for sulfur recovery from a hydrogen sulfide containing gas stream |
| CN1155874A (en) * | 1995-05-30 | 1997-07-30 | 埃尔夫·阿奎坦生产公司 | Catalytic desulphurization process for a gas containing H2S and SO2 compounds, and catalyst for impelementing said process |
| JP2001270706A (en) * | 2000-03-27 | 2001-10-02 | Jgc Corp | Method for recovering sulfur from gas containing hydrogen sulfide, and sulfur recovering apparatus |
| CN201241071Y (en) * | 2008-03-25 | 2009-05-20 | 东南大学 | Single-bed self-heating type thermal decomposition gasification combusting reactor |
| CN202191843U (en) * | 2011-08-29 | 2012-04-18 | 山西阳煤丰喜肥业(集团)有限责任公司 | Desulfurizing device for low-concentration acidic gases containing H2S (hydrogen sulfide) |
| CN204114923U (en) * | 2014-09-25 | 2015-01-21 | 山东大学 | A kind of coal-firing device of low emission |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104197319A (en) | 2014-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5863885B2 (en) | Boiler system and power plant including the same | |
| AU2012316294B2 (en) | Dry sorbent injection during steady-state conditions in dry scrubber | |
| CN205199271U (en) | Middle -size and small -size coal fired boiler flue gas dedusting and desulfurizing denitration is treatment equipment in coordination | |
| CN101417223B (en) | Desulfurization and denitration carbon base fuel fume mercury absorbent and use thereof | |
| US20200061524A1 (en) | Carbon capture | |
| CN104100964A (en) | Synergistic removal system and method for realizing ultra-low emission of multiple pollutants of smoke of thermal power plant | |
| CN107596798B (en) | Pre-dedusting, desulfurizing and denitrating integrated treatment device and method | |
| TW201231147A (en) | Exhaust gas treatment method and apparatus | |
| CN203591690U (en) | System for removing sulfur, nitrate and mercury in flue gas at same time | |
| CN102172470A (en) | Method and device for removing sulfur and carbon oxides from power plant flue gas in combination mode | |
| CA3009250A1 (en) | Carbon capture | |
| JP2012091083A (en) | Thermal power plant equipped with carbon dioxide canister | |
| CN109482049A (en) | A kind of coke oven flue gas dry desulfurization denitration purification integral process | |
| CN203816509U (en) | Desulfuration and denitration system for low temperature coke oven exhaust | |
| CN101703875A (en) | Oxidizing method for removing gaseous elemental mercury in boiler fume | |
| CN203030173U (en) | Device for realizing combined contaminant removal through recycling chlorine elements in coal | |
| CN104197319B (en) | A kind of coal combustion method of low emission and device | |
| WO2024036884A1 (en) | System and method for treating coal-fired flue gas | |
| CN204114923U (en) | A kind of coal-firing device of low emission | |
| CN209456366U (en) | A kind of activated coke dry gas-cleaning system | |
| CN204034551U (en) | A kind of flue gas desulfurization device | |
| CN203628685U (en) | System for removing mercury in coal-fired flue gas in intensified-adsorption mode | |
| CN211435702U (en) | Multi-pollutant integrated removing system of circulating fluidized bed boiler | |
| US10773204B2 (en) | Systems and processes for removal and reduction of NOx and CO gases from flue/exhaust gas streams | |
| CN208066118U (en) | A kind of coke oven flue gas desulphurization denitration dedusting comprehensive treatment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |