CN101531938A - Two-section dry-type magnetic separation purification process before combustion of pulverized coal - Google Patents
Two-section dry-type magnetic separation purification process before combustion of pulverized coal Download PDFInfo
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- CN101531938A CN101531938A CN200810049339A CN200810049339A CN101531938A CN 101531938 A CN101531938 A CN 101531938A CN 200810049339 A CN200810049339 A CN 200810049339A CN 200810049339 A CN200810049339 A CN 200810049339A CN 101531938 A CN101531938 A CN 101531938A
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Abstract
The invention discloses a two-section dry-type magnetic separation purification process before the combustion of pulverized coal; the process comprises the step that after sampling is carried out by a ball mill, coal used for power generation firstly enters a coarse separator firstly and the process is characterized by also comprising the steps as follows: granule pulverized coal meeting the requirements of combustion granularity by the coarse separator directly enters a fine powder separator while the coarse powder burning coal is delivered to a microwave mixer, and treated simultaneously by adding a magnetic seed and a catalyst, and then conveyed to a first-section magnetic separator to carry out desulfurization and ash removal after treatment, later, cleaned coal after magnetic separation is returned to the ball mill again, and then tail coal is separated out; micro-powder fine coal which is separated out by the fine powder separator is directly conveyed to a burner while qualified pulverized coal which is separated out enters another microwave mixer, and also treated simultaneously by adding the magnetic seed and the catalyst, and then conveyed to a second-section magnetic separator to carry out desulfurization and ash removal after treatment, later, cleaned coal after magnetic separation is delivered to the burner for combustion, and then tail coal is separated out; and the process has the advantages of high efficiency, quick effect, energy conservation and electricity conservation, cleanness and safety, and good desulfurization effect.
Description
Technical field:
The invention belongs to coal dust desulfurization technology field.
Background technology:
Coal provides the industrial fuel of China 75%, and 76% power generation energy resource and 80% civilian commercial energy resource all are to utilize coal, occupy topmost status in China's primary energy source consumption structure.But coal is discharged a large amount of SO in combustion processes
2Gas accounts for 85% of coal fire discharged pollutent, therefore prevents and treats coal-fired SO
2Pollution is when last important and urgent work.Current coal-fired SO
2Before Pollution control technology can be divided into combustion by the sequencing of its enforcement, combustion neutralization combustion back three major types.Desulfurization before combustion mainly reduces sulphur content and ash content by desulfurization technologies such as gravity treatment, flotation, magnetic separation and chemistry, microbial desulfurizations, to reduce SO
2Quantity discharged; Desulfurization mainly refers to capturing sulfur briquette technology and circulating fluid-bed desulfurization technology in the combustion, can remove the sulphur of 50%-60%, and effect is not high, and has easy slagging scorification, difficult problems such as wearing and tearing and obstruction; Combustion back desulfurization claims flue gas desulfurization technique again, belongs to end treatment, although desulfurization degree can be up to 90%, its equipment and working cost are extremely expensive, and particularly waste liquid secondary treatment problem is outstanding, how to use in some developed countries such as U.S., day, moral.The desulfurization before combustion control techniques not only can improve utilising efficiency, the minimizing lime-ash quantity discharged of coal, can also alleviate sulfur in the coal greatly to the corrosion of subsequent handling equipment, thereby the prolongation service life of equipment also reduces production costs, and has the incomparable advantage of many combustions neutralization combustion back control techniquess.
It should be noted that: for improving efficiency of combustion, the present coal firing boiler of thermal power station more than 90% all adopted coal-powder boiler, the flouring technology system can be controlled at coal-fired granularity below 200 meshes before its combustion, this just provides the condition of dissociating fully for efficient pyritic sulphur and the ash-forming material of removing wherein of Applied Physics coal preparation method before combustion, and coal dust dry type magnetic separation technology just is to satisfy the sorting technology of this requirement.Present coal dust dry type High-gradient Magnetic selecting technology exists the outstanding problem that magnetic matrix stops up easily, the device processes ability is little, therefore the report that does not have industrialness to use so far as yet.For realizing the commerce operation of coal dust magnetic separation purification technology, the most feasible method is strengthened the magnetic of pyrite and ash content mineral substance in the coal no more than adopting a kind of economy, efficient, quick and gentle method, increase its difference with specific susceptibility between the matrix of coal, and then adopt the big intensity magnetic separator of treatment capacity to come coal dust is carried out the sorting purification, deviate from sulphur content wherein and contain grey mineral substance, adopt microwave exactly can reach this purpose the pre-treatment that coal dust carries out before the magnetic separation.
Summary of the invention:
The objective of the invention is pulverized coal preparation system in conjunction with coal power station, provide a kind of have efficient fast, energy saving, clean and safe, sweetening effectiveness preferably coal dust fire preceding two sections dry type magnetic separation purification process.
To achieve these goals, the present invention adopts following technical scheme: coal for power generation at first enters into coarse separator after ball mill carries out sample preparation; Directly enter in the pulverized-coal collector through the particulate coal dust that meets the granularity requirements of burning behind the mill separator, and the meal fire coal is fed to and adds the magnetic kind simultaneously in the microwave stirrer and catalyzer is handled, deliver to after the processing in the first stages of magnetic separation machine and carry out desulfurization and deashing, cleaned coal after magnetic separation turns back in the ball mill again, and tail coal is separated; Directly be sent in the burner through the isolated micro mist duff of pulverized-coal collector, and isolated qualified fine coal enters into another microwave stirrer same interpolation magnetic kind and catalyzer is handled, the second stages of magnetic separation machine of delivering to after the processing carries out desulfurization and deashing, cleaned coal after magnetic separation is sent in the burner and is burnt, and tail coal is separated.
Described magnetic kind and catalyzer composition are magnetite powder.
Described meal is coal-fired and be fed to that to add the time that magnetic kind and catalyzer handle in the microwave stirrer simultaneously be 150-200 second, and qualified fine coal enters into that another microwave stirrer is same to be added magnetic kind and catalyzer to carry out the treatment time be 150-200 second.
The present invention is in conjunction with the characteristics of coal-burning power plant's pulverized coal preparation system, coal-series pyrite microwave irradiation magnetic intensifying technology and dry magnetic separation technology is integrated with it, strengthen the magnetic of coal-series pyrite and ash content mineral substance by the method for controlled microwave irradiation atmosphere, microwave frequency, irradiation time and interpolation magnetic kind and catalyzer, whole process is efficient fast, energy saving, clean and safe and suitablely realize control automatically, removes the part organosulfur simultaneously.And the tail coal after the magnetic separation can be used as the chemical industry coal because of being rich in ash content and sulphur content, has reached fully rationally utilizing of resource.
Description of drawings:
Below in conjunction with accompanying drawing the present invention is described in further detail.
Fig. 1 is a technical process block diagram of the present invention.
Embodiment:
As shown in Figure 1, coal for power generation is controlled at coal-fired granularity below 200 meshes after ball mill carries out sample preparation, at first it is delivered in the coarse separator.Directly enter in the pulverized-coal collector through the particulate coal dust that meets the granularity requirements of burning behind the mill separator, and the meal fire coal is fed to and adds the magnetic kind simultaneously in the microwave stirrer and catalyzer is handled, magnetic kind and catalyzer composition are magnetite powder, and the treatment time is 150-200 second.By parameters such as controlled microwave irradiation atmosphere, microwave frequency and irradiation times, wherein pyritic sulphur and part organosulfur is converted into ferromagnetic iron sulphur compound (mainly being pyrrhotite).Deliver to after the processing in the first stages of magnetic separation machine and carry out desulfurization and deashing, the cleaned coal after magnetic separation turns back in the ball mill again, and tail coal inferior is separated.The isolated particulate coal dust of mill separator enters into thin separator, directly be sent in the burner through the isolated micro mist duff of pulverized-coal collector through bellows, and isolated qualified fine coal enters into another microwave stirrer same interpolation magnetic kind and catalyzer is handled, and the treatment time is 150-200 second.By parameters such as controlled microwave irradiation atmosphere, microwave frequency and irradiation times, wherein pyritic sulphur and part organosulfur is converted into ferromagnetic iron sulphur compound, the second stages of magnetic separation machine of delivering to after the processing carries out the sorting desulfurization and deashing.Cleaned coal after magnetic separation is sent into directly burning in the burner, and tail coal inferior is separated, and deviates from wherein ash content and sulphur content mineral substance, and the tail coal that sorting obtains is because rich in mineral substances and sulphur content can be used as the chemical industry coal.
Claims (3)
1, a kind of coal dust fires preceding two sections dry type magnetic separation purification process, and coal for power generation at first enters into coarse separator after ball mill carries out sample preparation; It is characterized in that directly entering in the pulverized-coal collector through the particulate coal dust that meets the granularity requirements of burning behind the mill separator, and the meal fire coal is fed to and adds the magnetic kind simultaneously in the microwave stirrer and catalyzer is handled, deliver to after the processing in the first stages of magnetic separation machine and carry out desulfurization and deashing, cleaned coal after magnetic separation turns back in the ball mill again, and tail coal is separated; Directly be sent in the burner through the isolated micro mist duff of pulverized-coal collector, and isolated qualified fine coal enters into another microwave stirrer same interpolation magnetic kind and catalyzer is handled, the second stages of magnetic separation machine of delivering to after the processing carries out desulfurization and deashing, cleaned coal after magnetic separation is sent in the burner and is burnt, and tail coal is separated.
2, coal dust according to claim 1 fires preceding two sections dry type magnetic separation purification process, it is characterized in that described magnetic kind and catalyzer composition are magnetite powder.
3, coal dust according to claim 1 fires preceding two sections dry type magnetic separation purification process, it is characterized in that described meal is coal-fired and be fed to that to add the time that magnetic kind and catalyzer handle in the microwave stirrer simultaneously be 150-200 second that qualified fine coal enters into that another microwave stirrer is same to be added magnetic kind and catalyzer to carry out the treatment time be 150-200 second.
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| CN200810049339A CN101531938A (en) | 2008-03-11 | 2008-03-11 | Two-section dry-type magnetic separation purification process before combustion of pulverized coal |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266816A (en) * | 2010-03-04 | 2011-12-07 | 何汶峰 | Thermal coal low-cost ash reduction and byproduct mineral comprehensive utilization process |
| CN102506440A (en) * | 2011-10-20 | 2012-06-20 | 安徽理工大学 | Embedded dry magnetic separation purification and return powder magnetic separation regrinding process |
| CN103952206A (en) * | 2014-05-14 | 2014-07-30 | 许宁 | Ash fall desulfurization method before combustion of solid fuel |
| CN104028358A (en) * | 2014-06-16 | 2014-09-10 | 中国矿业大学 | Fine coal microwave medium intensified magnetic separation cleaning system and fine coal microwave medium intensified magnetic separation cleaning process |
| CN105176626A (en) * | 2015-10-12 | 2015-12-23 | 中国矿业大学 | Method for removing sulfur content of coal |
| CN105199803A (en) * | 2015-08-20 | 2015-12-30 | 南京中电节能有限公司 | Method for desulphurization of high-sulfur-content coal powder in thermal power plant |
| CN107805529A (en) * | 2017-11-23 | 2018-03-16 | 安徽亦知企业管理有限公司 | A kind of coal microwave desulfurization system and method |
| CN107937085A (en) * | 2017-11-23 | 2018-04-20 | 安徽理工大学 | A kind of system and method that coal desulfurization before combustion processing is carried out using microwave radiation |
| CN108816501A (en) * | 2018-05-07 | 2018-11-16 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of sintering dust separation ash magnetic kind magnetization dry separation iron-extracting process |
| CN109158206A (en) * | 2018-07-12 | 2019-01-08 | 昆明理工大学 | A kind of classification of multistage, premagnetization are from strengthening magnetic selection method |
| CN109331760A (en) * | 2018-12-07 | 2019-02-15 | 国电科学技术研究院有限公司 | From gravity electromagnetic radiation reactor |
| CN111575079A (en) * | 2020-05-26 | 2020-08-25 | 镇江市蓝火环保能源有限公司 | Raw material coal powder for environment-friendly coal powder production and treatment method thereof |
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2008
- 2008-03-11 CN CN200810049339A patent/CN101531938A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266816A (en) * | 2010-03-04 | 2011-12-07 | 何汶峰 | Thermal coal low-cost ash reduction and byproduct mineral comprehensive utilization process |
| CN102506440A (en) * | 2011-10-20 | 2012-06-20 | 安徽理工大学 | Embedded dry magnetic separation purification and return powder magnetic separation regrinding process |
| CN103952206A (en) * | 2014-05-14 | 2014-07-30 | 许宁 | Ash fall desulfurization method before combustion of solid fuel |
| CN104028358A (en) * | 2014-06-16 | 2014-09-10 | 中国矿业大学 | Fine coal microwave medium intensified magnetic separation cleaning system and fine coal microwave medium intensified magnetic separation cleaning process |
| CN104028358B (en) * | 2014-06-16 | 2016-02-17 | 中国矿业大学 | A kind of Bed for Fine Coal microwave-medium strengthening magnetic separation clean system and technique |
| CN105199803A (en) * | 2015-08-20 | 2015-12-30 | 南京中电节能有限公司 | Method for desulphurization of high-sulfur-content coal powder in thermal power plant |
| CN105176626A (en) * | 2015-10-12 | 2015-12-23 | 中国矿业大学 | Method for removing sulfur content of coal |
| CN105176626B (en) * | 2015-10-12 | 2018-05-22 | 中国矿业大学 | A kind of method for removing coal sulphur content |
| CN107937085A (en) * | 2017-11-23 | 2018-04-20 | 安徽理工大学 | A kind of system and method that coal desulfurization before combustion processing is carried out using microwave radiation |
| CN107805529A (en) * | 2017-11-23 | 2018-03-16 | 安徽亦知企业管理有限公司 | A kind of coal microwave desulfurization system and method |
| CN107805529B (en) * | 2017-11-23 | 2018-08-24 | 江苏铭朗环境科技有限公司 | A kind of coal microwave desulfurization system and method |
| CN107937085B (en) * | 2017-11-23 | 2019-10-29 | 安徽理工大学 | A kind of system and method carrying out the processing of coal desulfurization before combustion using microwave radiation |
| CN108816501A (en) * | 2018-05-07 | 2018-11-16 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of sintering dust separation ash magnetic kind magnetization dry separation iron-extracting process |
| CN109158206A (en) * | 2018-07-12 | 2019-01-08 | 昆明理工大学 | A kind of classification of multistage, premagnetization are from strengthening magnetic selection method |
| CN109158206B (en) * | 2018-07-12 | 2020-12-15 | 昆明理工大学 | Multi-stage grading and pre-magnetic self-strengthening magnetic separation method |
| CN109331760A (en) * | 2018-12-07 | 2019-02-15 | 国电科学技术研究院有限公司 | From gravity electromagnetic radiation reactor |
| CN109331760B (en) * | 2018-12-07 | 2023-08-04 | 国电科学技术研究院有限公司 | Self-gravity electromagnetic radiation reactor |
| CN111575079A (en) * | 2020-05-26 | 2020-08-25 | 镇江市蓝火环保能源有限公司 | Raw material coal powder for environment-friendly coal powder production and treatment method thereof |
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Application publication date: 20090916 |