CN1226221C - Clean combustion of boiler using coal as fuel and comprehensive utilization - Google Patents
Clean combustion of boiler using coal as fuel and comprehensive utilization Download PDFInfo
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- CN1226221C CN1226221C CNB011362588A CN01136258A CN1226221C CN 1226221 C CN1226221 C CN 1226221C CN B011362588 A CNB011362588 A CN B011362588A CN 01136258 A CN01136258 A CN 01136258A CN 1226221 C CN1226221 C CN 1226221C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The present invention creates a method, technology, a preparation and products of the clean combustion and the comprehensive use of coal-fired boilers in an optimizing mode in subject cross and industry spanning technology. One millesimal to forty percent of combustion mixing agent is added into coal and has functions of sulphur solidifying agents, catalysts, activating agents, stabilizing agents, mineralizing agents, combustion improver, early strength admixtures and loosening agents. The combustion mixing agents and the coal are ground together to form compatible particles to be sent into a boiler to carry out compatible calcination. Reactants realize quick combustion and quick cooling. The sulphur solidifying reaction and the mineralizing reaction of the combustion mixing agents and the coal provide conditions for converting pollutants such as ash residue, SO2, etc. in the boiler into products with high added value, thus, soot pollution is effectively eliminated, and simultaneously, the present invention can reduce products such as active powder coal ash, self hardening property powder coal ash, belite cement clinker, new silicate materials, etc.
Description
Technical field:
The present invention relates to a kind of clean combustion of boiler using coal as fuel and comprehensive utilization method, especially circular fluid bed clean burning and comprehensive utilization method, be specifically related in coal dust, add certain co-combustion agent, with the affine particle of formation behind the coal mix grinding, in coal firing boiler, carry out affine calcining, to eliminate coal burning pollution, generate the method for product simultaneously, belong to International Classification of Patents C04B7/14 technical field.
Background technology:
Along with industrial expansion, it is annual more than 300,000,000 tons that the quantity discharged of China's flyash has reached.The discharging of flyash has taken a large amount of soils, also becomes a big obstacle of environment protection.For a long time, for the comprehensive regulation and the utilization of carrying out flyash, each state has all carried out the exploration of number of ways.But still be difficult to find effective feasible way.At " coal purification of combustion and concomitant product commercialization " (Zhu Xuefang work, China Construction Industry Press's in December, 1999 first version) in the book, the author systematically proposed a kind of novel method that realizes the coal purification of combustion, form " affine particle " by coal with the co-combustion agent grinding, send into and carry out " affine calcining " in the stove, and the realization response thing changes into products such as cement clinker under the condition of " it is cold that speed is burnt speed ".No. 99121977.5 (publication number CN1294181A) patent application also discloses a kind of coal purification of combustion and produced the method for concomitant product, in coal-powder boiler and cyclone furnace, by in coal dust, add a certain proportion of mix burn thing and coal mix homogenizing after the affine particle of formation, spray into and carry out affine calcining in the stove, thereby improve mass transfer, heat transmission and the momentum transfer of combustionmaterial, and can obtain concomitant product-active fly ash, self-hardening property flyash, belite cement grog and respective slag.But because this method only generates affine particle by mixing the method for burning thing and the direct mix grinding homogenizing of coal dust, the affine degree between the reactant is lower, and affine incinerating effect is relatively poor, and it is corresponding lower to cause solidifying desulfurization degree, can only reach 20-70%.
In addition, well-known, for the production of concomitant products such as self-hardening property flyash and belite cement grog, its quality product depends primarily on the Several Factors such as compatible reaction degree, temperature of reaction and calcination time between the reactant.Because No. 99121977.5 patent application methods are used for coal-powder boiler and cyclone furnace, mixing the affine particle that burns thing and coal dust only has about 2 seconds the combustion time in burner hearth, because the affine degree of affine particulate is poor, in short like this calcination time, concomitant product after being difficult to guarantee to burn, the quality product that comprises the belite cement grog can not normally be produced product continuously.
To sum up say, be used for the coal purification of combustion of coal-powder boiler and cyclone furnace and the method for generation concomitant product at present and have following shortcoming:
1, only generate affine particle by mixing the method for burning thing and the direct mix grinding homogenizing of coal dust, the affinity between the reactant is low, affine incinerating weak effect, and it is corresponding lower to solidify desulfurization degree;
2, reactant carries out inadequate affine calcining in very short calcination time, is difficult to guarantee the quality product of concomitant product.
Because the above-mentioned defective that the technical scheme that aforementioned patent discloses exists is transplanted to general circular fluid bed at present with this method, has following technology barrier at least:
1, the present fuel overwhelming majority who uses of circular fluid bed is burnt directly into stove as the coal cinder of diameter at 8-10mm.Even and co-combustion agent mix grinding fed to boiler, because the shortcoming of affinity difference is not resolved between the reactant, although reactant incinerating time in stove long (surplus being about 10 minute), but still exist the defective that affine calcining effect is relatively poor, desulfurization degree is not fully up to expectations.
2, because the working temperature of circular fluid bed generally about 800-900 ℃, up to for 1350-1450 ℃ the furnace temperature, is not taked the other technologies measure with respect to coal-powder boiler, be difficult to the concomitant product product that continuous production is qualified under such low temperature.
Summary of the invention:
The inventor explores the road of eliminating smoke pollution and carrying out the comprehensive regulation, utilization at the above-mentioned shortcoming of prior art, and a kind of clean burning and comprehensive utilization method of realizing in circular fluid bed is provided.
The present invention seeks to be achieved through the following technical solutions.
A kind of method of utilizing circular fluid bed to realize clean burning, in coal, add the co-combustion agent of 0.1-40%, make coal form affinity particles with the co-combustion agent grinding, send into and carry out the affinity calcining in the stove, it is cold that realization response thing speed is burnt speed, generates hydraulicity mineral concomitant product, it is characterized in that: add co-combustion agent and add the common wet-milling formation of water affinity particles again in coal, synthesize by homogenizing, hydro-thermal, form hydrated product and carry out the affinity calcining.
Wherein, the raw material of described co-combustion agent is selected from one or more in red mud, phosphorus slag, carbide slag, saltcake, lithium slag, ferroalloy slag, barite or its mine tailing, rare earth element mine tailing, Pb-Zn tailings, copper mine tailing, pyrite, volcanic ash, Wingdale, lime, muddy limestone, gypsum, fluorite, silica flour, perlite powder, yellow soda ash, potassium permanganate, Repone K, potassium perchlorate, sodium-chlor, zinc, manganese, nickel and the chromium.
Wherein, in described circular fluid bed, use low grade coal, resinous shale, coal gangue or coal slime.
Wherein, described coal and co-combustion agent are carried out pre-homogenizing and are handled, and its work in-process, finished product are established homogenizing storehouse and stored, and carry out homogenizing, product shelf life 7-10 days.
Beneficial effect of the present invention is as follows:
The present invention is the technology of starting out from subject crossing, inter-trade technical optimization, existing circular fluid bed is not being done under the situation of change, add the common wet-milling formation of water affinity particles again by in fuel, adding co-combustion agent, homogenizing, hydro-thermal are synthesized, form hydrated product and carry out the affinity calcining method, it is cold that the speed of realization response thing is burnt speed, makes whole lime-ash and 90% above SO
2Directly change into the silicates product, thereby realize the comprehensive utilization of clean combustion of boiler using coal as fuel and coal resource.The feature of this boiler no longer is the boiler on the traditional concept, it is the burner of combustion heat supplying, self purification function that has decontamination simultaneously, it is again the reactor that pollutent is converted into high value added product in stove, burn under the fast cold guide of theory disposable realization clean combustion of boiler using coal as fuel and comprehensive utilization method, technology, prescription and product in affine calcining and speed that the invention people foundes for the Chinese Academy of Sciences.
Description of drawings:
Fig. 1 carries out the process synoptic diagram that comprehensive combustion utilizes for the present invention.
Embodiment:
Implement this technology, original circular fluid bed need not changed, and adds 0.1-40% co-combustion agent and the common wet-milling of water in coal, forms affinity particles, synthesizes by homogenizing, hydro-thermal, forms hydrated product and carries out the affinity calcining.This co-combustion agent has sulphur-fixing agent, catalyzer, stablizer, mineralizer, activator, ignition dope, raising agent, effects such as hardening accelerator, available industrial waste with above-mentioned effect, as red mud, phosphorus slag, carbide slag, saltcake, lithium slag, the waste material of ferroalloy works etc., if industrial waste is apart from factory's freight charges height far away, also available ore, mine tailing and cheap chemical substance or metal, as barite or its mine tailing, rare earth element mine tailing, Pb-Zn tailings, the copper mine tailing, pyrite, volcanic ash, Wingdale, lime, muddy limestone, gypsum, fluorite, silica flour, perlite powder, yellow soda ash, potassium permanganate, Repone K, potassium perchlorate, sodium-chlor, zinc, manganese, nickel, chromium etc.The prescription of co-combustion agent, will by ature of coal and user the different combination of requirement range of product apolegamy, co-combustion agent itself is that one or more preparation of raw material forms, so after the proportion scheme of co-combustion agent determines, to use belted electronic balance and its proportioning of microcomputer control, could guarantee that the co-combustion agent prescription is accurate.The proportioning of coal and co-combustion agent also will could guarantee quality product with belted electronic balance and microcomputer control.
As shown in Figure 1, for circular fluid bed, in coal, add the co-combustion agent of 0.1-40%, add the common wet-milling of water again and form affinity particles, pass through homogenizing, hydro-thermal is synthetic, forms hydrated product and carries out the affinity calcining, forms highly active mineral, Solid solution etc., improved the thermo-efficiency of efficiency of combustion and system, the carbon content of product reduces, and the existing bituminous coal fired boiler lime-ash carbon containing that burns burns about hard coal lime-ash carbon containing 20-40% about about 3-20%, by adopting this technology, the product carbon containing all can be reduced to below 3%, and according to the difference of boiler situation, economizing on coal to reach 1-15%, and characteristics with microballon enrichment and refinement, have very high hydraulically active again, its purposes is very extensive, according to prescription and volume different, can produce active fly ash, self-hardening property flyash, belite cement grog etc., and because speed is burnt the cold product of speed, grindability is good, can do concrete toughener and water reducer, exempt to shake concrete, manufacture various novel materials, nano material etc.If customer requirements is to produce the belite cement grog, then the grog that comes out with existing cement kiln is the same, after storing homogenizing, adds retardant gypsum and additive grinding together, the cement that grinding comes out must dispatch from the factory through storing could to pack after homogenizing reaches qualified product.The effect that the inventive method is outstanding is embodied in its desulfurization degree and can brings up to more than 90% NO
X, CO, CO
2Can reduce to minimum discharging, reach the emission level of pollution-free, oligosaprobic " green boiler " better.
Fuel, starting material need be carried out pre-homogenizing and handle, and its work in-process, finished product, product need be established the homogenizing storehouse storage vault, carry out homogenizing, product shelf life 7-10 days.
Table 1 in the following table and table 2 are respectively effect table and the quality product table that technical solution of the present invention is implemented in circular fluid bed.
The effect table that table 1 is implemented in circular fluid bed for technical solution of the present invention.
| The style numbering | The type of furnace | Co-combustion agent | Desulfurization degree % | Quantity discharged reduces % | Product carbon containing % | % economizes on coal | |||
| Code name | Volume % | NOX ％ | CO2 ％ | CO ％ | |||||
| 1 | Circulation fluidized-bed furnace | C1 | 9-18 | 92.8 | 87.9 | 36.7 | 10.6 | 2.6 | 8.9 |
| 2 | Circulation fluidized-bed furnace | C2 | 10-18 | 94.6 | 90.6 | 37.8 | 10.4 | 1.5 | 9.5 |
| 3 | Circulation fluidized-bed furnace | C3 | 10-20 | 98.2 | 95.8 | 36.9 | 11.8 | 2.0 | 9.2 |
| 4 | Circulation fluidized-bed furnace | C4 | 10-20 | 99.0 | 96.8 | 38.2 | 12.5 | 1.0 | 9.8 |
| 5 | Circulation fluidized-bed furnace | C5 | 8-14 | 91.6 | 92.9 | 30.2 | 10.6 | 1.6 | 8.6 |
The quality product table that table 2 is implemented in circular fluid bed for technical solution of the present invention
| Specimen coding | C 2S accounts for clinker mineral % | Specific surface area m 2/kg | Time of coagulation hr:min | Anti-folding/resistance to compression Mpa | |||
| Initial set | Final set | 3d | 7d | 28d | |||
| 1 | 45.06 | 389 | 2:50 | 3:40 | 4.8/24.2 | 6.5/28.9 | 7.4/48.2 |
| 2 | 46.02 | 369 | 3:08 | 4:10 | 6.2/28.2 | 6.6/29.1 | 7.6/54.8 |
| 3 | 48.06 | 388 | 3:06 | 4:15 | 6.6/28.7 | 6.8/29.6 | 7.9/56.6 |
| 4 | 50.02 | 389 | 3:19 | 3:40 | 6.8/30.6 | 6.9/29.4 | 7.8/58.2 |
| 5 | 41.58 | 499 | 2:06 | 3:48 | 4.8/23.8 | 6.3/28.9 | 7.2/46.8 |
Claims (4)
1, a kind of method of utilizing circular fluid bed to realize clean burning, in coal, add the co-combustion agent of 0.1-40%, make coal form affinity particles with the co-combustion agent grinding, send into and carry out the affinity calcining in the stove, it is cold that realization response thing speed is burnt speed, generates hydraulicity mineral concomitant product, it is characterized in that: add co-combustion agent and add the common wet-milling formation of water affinity particles again in coal, homogenizing, hydro-thermal are synthesized, and form hydrated product and carry out the affinity calcining.
2, by the described method of claim 1, it is characterized in that: the raw material of co-combustion agent is selected from red mud, phosphorus slag, carbide slag, saltcake, lithium slag, ferroalloy slag, barite or its mine tailing, rare earth element mine tailing, Pb-Zn tailings, copper mine tailing, pyrite, volcanic ash, Wingdale, lime, muddy limestone, gypsum, fluorite, silica flour, perlite powder, yellow soda ash, potassium permanganate, Repone K, potassium perchlorate, sodium-chlor, zinc, manganese, nickel and the chromium one or more.
3, by the described method of claim 1, it is characterized in that: in described circular fluid bed, use low grade coal, resinous shale, coal gangue or coal slime.
4, by the described method of claim 1, it is characterized in that: described coal and co-combustion agent are carried out pre-homogenizing and are handled, and its work in-process, finished product are established homogenizing storehouse and stored, and carry out homogenizing, product shelf life 7-10 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011362588A CN1226221C (en) | 2001-10-12 | 2001-10-12 | Clean combustion of boiler using coal as fuel and comprehensive utilization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011362588A CN1226221C (en) | 2001-10-12 | 2001-10-12 | Clean combustion of boiler using coal as fuel and comprehensive utilization |
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| CN1356282A CN1356282A (en) | 2002-07-03 |
| CN1226221C true CN1226221C (en) | 2005-11-09 |
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| CNB011362588A Expired - Fee Related CN1226221C (en) | 2001-10-12 | 2001-10-12 | Clean combustion of boiler using coal as fuel and comprehensive utilization |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE532790C2 (en) * | 2007-11-12 | 2010-04-13 | Procedo Entpr Etablissement | Method of treating pozzolanes |
| CN102260051A (en) * | 2010-05-28 | 2011-11-30 | 北京工业大学 | Method for treating NOx generated by firing coal in novel dry-process cement kiln |
| CN101829668B (en) * | 2010-05-28 | 2012-06-20 | 济南市琦泉热电有限责任公司 | Process for producing high-strength compound ash from boiler ash of circulating fluid bed |
| CN101935568B (en) * | 2010-09-07 | 2013-03-20 | 华中科技大学 | High-temperature biomass micron fuel |
| CN101955834A (en) * | 2010-09-28 | 2011-01-26 | 中科创投(北京)科技有限公司 | High-efficiency desulfurization economizer agent of coal burning boiler |
| CN102504908B (en) * | 2010-11-08 | 2014-03-12 | 翟风标 | Mineralizing sulfur-fixing agent and preparation method thereof |
| CN104208989A (en) * | 2014-09-12 | 2014-12-17 | 山西平朔煤矸石发电有限责任公司 | Preparation method for mixed desulfurizing agent for circulating fluidized bed boiler |
| CN105276576B (en) * | 2015-10-20 | 2017-11-07 | 张保森 | A kind of coal desulfurization technique |
| CN109486544A (en) * | 2017-09-12 | 2019-03-19 | 平顶山市同为新材料研究所 | A kind of technique exempted from drying-type mixing coal slime and produce dry moulded coal using it |
| CN107971037A (en) * | 2017-11-30 | 2018-05-01 | 宁夏宝塔化工中心实验室(有限公司) | A kind of new calcium carbide production technology catalyst |
| CN109943379A (en) * | 2019-03-23 | 2019-06-28 | 浙江中煤检测有限公司 | A kind of coal slime pre-cure process used for recirculating fluidized bed |
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Inventor after: Zhu Xuefang Inventor after: Zheng Chunlei Inventor before: Zhu Xuefang |
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Effective date of registration: 20100317 Address after: 100086 No. 943, 206 South Road, Haidian District, Beijing, Zhongguancun Co-patentee after: Zheng Chunlei Patentee after: Zhu Xuefang Address before: 100086 No. 943, 206 South Road, Haidian District, Beijing, Zhongguancun Patentee before: Zhu Xuefang |
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