CN101591549A - A kind of method of quickly producing coke through microwave heating - Google Patents
A kind of method of quickly producing coke through microwave heating Download PDFInfo
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- CN101591549A CN101591549A CNA2009100231927A CN200910023192A CN101591549A CN 101591549 A CN101591549 A CN 101591549A CN A2009100231927 A CNA2009100231927 A CN A2009100231927A CN 200910023192 A CN200910023192 A CN 200910023192A CN 101591549 A CN101591549 A CN 101591549A
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Abstract
The invention discloses a kind of method of quickly producing coke through microwave heating, this method adopts microwave generating apparatus as the heating thermal source, microwave frequency is heated to 900 ℃-1100 ℃ with coking coal and carries out high temperature carbonization between 300～300000MHz, generates coke, coal tar oil and gas.The coal charge that present method is handled is under the effect of microwave, and with elevating the temperature to the needed temperature range of coking than the short time, fully pyrolysis of the fugitive constituent in the coal charge generates coke, coal tar oil and gas at last.This method can be used for the pyrolytic process of coking coal, and the coal tar oil and gas is carried in the pre-treatment of coal in power plant, technologies such as coking coal preheating or formed coke preparation, and it is short to have flow process, and the cycle is short, efficient height, constant product quality, the characteristics that the comprehensive utilization of resources rate is high.
Description
Technical field
The invention belongs to the coal pyrolysis technical field, relate to a kind of method of quickly producing coke through microwave heating, this method is mainly used in the feed coal high temperature pyrolysis and produces coke, coal tar oil and gas.Also can be used for coal drying, fuel-burning power plant and steam coal and go into the stokehold pre-treatment, extract the coal tar in the coal and the valency gaseous constituent is arranged.
Background technology
High-temperature coking, high temperature carbonization also are in coking, are a kind of of the dry distillation of coal, are meant that coal is heated to 900 ℃～1100 ℃ under the condition of secluding air, produce thermolysis, generate the process of products such as coke, coal tar, crude benzol, coal gas.When the temperature of coal charge was higher than 100 ℃, the moisture in the coal was steamed; When temperature is elevated to more than 200 ℃, can discharge the middle combination water of producing coal; When temperature reached more than 350 ℃, caking coal began to soften, and further formed the heavy-gravity plastic mass; When temperature rose to 400 ℃～500 ℃, most of coal gas and coal tar were separated out, and claimed one time thermal decomposition product; At 450 ℃～550 ℃, thermolysis is proceeded, residue retrogradation and solidify to form semicoke gradually; Be higher than 550 ℃, semicoke continues to decompose, and separates out remaining volatile matter (main component is hydrogen, methane etc.), and semicoke weightlessness is shunk simultaneously, forms crackle; Temperature is higher than 800 ℃, and the hardening of semicoke volume-diminished forms porous coke/semicoke etc.When destructive distillation was carried out in the cell-type gas retort, one time thermal decomposition product contacted with red-hot coke and high temperature furnace wall, and the secondary thermolysis takes place, and formed secondary thermal decomposition product (coke-oven gas and other coking chemistry product).
Coking main products coke is important blast furnace ironmaking raw material, also can be used for production fields such as casting, gas making, calcium carbide production and non-ferrous metal metallurgy.The coke that the whole world is used for blast furnace production every year accounts for more than 85% of coke ultimate production.Coal tar is the mixture of aromatic hydrocarbons, heterogeneous ring compound etc., is the important source of industrial acquisition aromatic hydrocarbons.Coke-oven gas can be used for fuel and produces industrial chemicals such as methyl alcohol, substitute natural gas.
At present, the high temperature pyrolysis both domestic and external main type of furnace of producing coke has Otto formula coke oven, Ka Er. and in addition Steele, Richard Formed Coke Furnace, Krupp-Kao Baisi Formed Coke Furnace etc. also have the JN Formed Coke Furnace of Japanese Nippon Steel formula coke oven and China.In order to adapt to the modern steel industrial expansion, modern coke oven must also will be paid attention to polluting control simultaneously to large scale development, realizes efficient, energy-conservation, oligosaprobic target.More than these type of furnaces all adopt external-heat, promptly utilize coking chamber outside furnace wall that coal charge is conducted heat, though the gas quality that produces is stable, there is inhomogeneous, the problem such as pyrolysis time is long, production efficiency is relatively low of conducting heat in technological process.
Summary of the invention
Defective or deficiency at existing coking technology exists the objective of the invention is to, and provide a kind of coal high temperature carbonization rapidly and efficiently to produce the method for coke, and this method has characteristics such as pyrolysis rate is fast, production efficiency is high, constant product quality, yield height.
In order to realize above target, the present invention takes following technical solution:
A kind of method of quickly producing coke through microwave heating, this method adopts microwave generating apparatus as the heating thermal source, microwave frequency is heated to 900 ℃～1100 ℃ with coking coal and carries out high temperature carbonization between 300～300000MHz, generates products such as coke, coal tar oil and gas.
Some other characteristics of the present invention are:
Described microwave generating apparatus perhaps is provided with in inside in the outer setting of pyrolysis of coal stove (coking furnace), and the shape of microwave generating apparatus designs in conjunction with the requirement of microwave safe standard and the shape of pyrolysis installation.
The granularity of described coking coal accounts for about 80% of gross weight for the coal feed weight less than 3mm, coking coal uses coking coal, coking to join moulded coal, make moulded coal or formcoke from cold briquetting coal firm by ramming, its composition mainly is: fugitive constituent is at 25%-32%, thickness of colloidal matter layer is between 17-22mm, caking index is between 60-75, and moisture is about 7%.
The coal charge that present method is handled is under the effect of microwave, and with elevating the temperature to the needed temperature range of coking (900 ℃～1100 ℃) than the short time, fully pyrolysis of the fugitive constituent in the coal charge generates coke, coal tar oil and gas at last.This method can be used for the high temperature pyrolysis of coking coal, pre-treatment, coking coal preheating or the formed coke preparation etc. of coal in power plant, has with short production cycle, characteristics such as efficient is high, constant product quality, comprehensive utilization of resources rate height.
Embodiment
Method of the present invention is to utilize the basic fine structure coupling of special wave band that microwave has and material to produce heat to heat, the intensification of coal charge is not by heat transfer but finishes by outfield and object interaction, it has selectivity, untouchable, globality, good uniformity, heat-up time is short, start and stop fast, easy to operate, energy utilization rate and heating efficiency height, safety and sanitation are pollution-free.
Embodiment of the present invention can be selected following several:
Scheme one: place the pyrolysis of coal stove to carry out outer heating outward microwave generator, the pyrolysis of coal body of heater adopts the silica brick that can see through microwave, the refractory materials that microwave oven such as magnesia brick or high alumina brick is suitable for is as furnace wall, in furnace chamber, add coal, coal can be heated between 900 ℃～1100 ℃ by microwave generator in furnace chamber, coal charge is carried out the fast selective heating, rely on the dielectric properties conversion microwave energy of coal charge self, produce heat, utilize the effect of microwave activation molecule, reach the purpose of coal fast pyrogenation, and in pyrolytic process, the material that the waste heat of coal gas is added after can making removes a part of mechanical water and molecular water, utilizes heat energy fully, thereby obtains coke, the coal tar oil and gas.
Scheme two: microwave generating apparatus is placed pyrolysis of coal stove internal heating, microwave generating apparatus can be made certain shape according to the furnace binding needs, also microwave generator can be made a plurality of, be distributed in the pyrolysis of coal stove, body of heater is except building by laying bricks or stones with insulating brick, outside the body of heater outside need add one deck microwave isolated material again, prevent that microwave leakage from coming out of the stove, coal can be static form by microwave heating, thereby obtain coke, coal tar oil and gas.
Scheme three: microwave generating apparatus places in the pyrolysis of coal stove and outside the stove, heating is used to produce coke, coal tar oil and gas simultaneously.The microwave generating apparatus shape is provided with in conjunction with the requirement of microwave safe standard and the shape of pyrolysis installation.
Below be the embodiment that the contriver provides, need to prove that the present invention is not limited to following examples, every technical scheme that provides according to the present invention all should be considered as protection scope of the present invention.
Embodiment 1:
Get a certain amount of coking mixed coal, after bottle coal, coking coal, 1/3 coking coal, rich coal etc. cooperate according to a certain percentage in the mixed coal, be crushed to certain particle.Put into the reactor of microwave heating, microwave frequency is 2450MHz, is heated to 900 ℃-1200 ℃, pyrolysis 60-90min, experiment output coke, three kinds of products of coal tar oil and gas.The coke strenth detected result is: coke strenth M
40Be 86.3%, M
10Be 7.3%.The result is as shown in table 1 in the coke composition analysis, and gas composition is analyzed as shown in table 2.
Table 1: coke composition (%)
| Composition | C | A d | V daf | S t |
| Content | 82.1 | 11.74 | 0.8 | 0.46 |
Table 2: gas composition (%)
| Composition | H 2 | CH 4 | CO | N 2 | CO 2 | CnHm | O 2 |
| Content (volume ratio) | 62.0 | 27.9 | 6.0 | 0.2 | 1.5 | 2.0 | 0.4 |
Embodiment 2:
Get a certain amount of coking coal and be crushed to granularity accounting for more than 80% less than 3mm, it is positioned in the pyrolysis of coal reaction vessel, place the pyrolysis of coal device to carry out outer heating outward microwave generator, microwave frequency is 2450MHz, be heated to 1000 ℃-1100 ℃, pyrolysis 60-90min, coke, the coal tar oil and gas of experiment output.Coke strenth M
40Be 87.1%, M
10Be 7.5%.Gas composition is as shown in table 3.
Table 3: gas composition (%)
| Composition | H 2 | CH 4 | CO | N 2 | CO 2 | CnHm | O 2 |
| Content (volume ratio) | 64.0 | 26.9 | 5.0 | 0.2 | 1.5 | 2.0 | 0.4 |
The coal that method of the present invention was suitable for mainly is the used coals of some coking, join with coal, make moulded coal, formcoke from cold briquetting coal etc. firm by ramming as coking coal, coking, the coal charge that present method is handled is under the effect of microwave, with the time of weak point can elevate the temperature to the needed temperature range of coking, the fully pyrolysis of fugitive constituent in the coal charge generates coke, coal tar oil and gas at last.This method can be used for the pyrolytic process of coking coal, coal tar oil and gas, coking coal preheating or formed coke preparation etc. are proposed in the pre-treatment of coal in power plant, has that flow process is short, the cycle is short, efficient is high, a constant product quality, characteristics that the comprehensive utilization of resources rate is high.
Claims (4)
1, a kind of method of quickly producing coke through microwave heating, it is characterized in that this method adopts microwave generating apparatus as the heating thermal source, microwave frequency is between 300～300000MHz, coking coal is heated to 900 ℃-1100 ℃ carries out high temperature carbonization, generate coke, coal tar oil and gas.
2, the method for claim 1, it is characterized in that, described microwave generating apparatus perhaps is provided with at the pyrolysis of coal furnace interior in the outer setting of pyrolysis of coal stove, and the shape of microwave generating apparatus is provided with in conjunction with the requirement of microwave safe standard and the shape of pyrolysis oven.
3, the method for claim 1 is characterized in that, described coking coal adopts selective crushing technology, and to be diameter be controlled at more than 80% less than the part of 3mm granularity.
4, as claim 1 or 3 described methods, it is characterized in that, described coking coal is that coking coal, coking are joined moulded coal and made moulded coal or formcoke from cold briquetting coal firm by ramming, its composition mainly is: fugitive constituent is at 25%-32%, thickness of colloidal matter layer is between 17mm～22mm, caking index between 60-75, moisture 7%.
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| CNA2009100231927A CN101591549A (en) | 2009-07-03 | 2009-07-03 | A kind of method of quickly producing coke through microwave heating |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103160325A (en) * | 2011-12-14 | 2013-06-19 | 上海麦风微波设备有限公司 | Technological method for direct production of coal gas by microwaves and device |
| CN103160325B (en) * | 2011-12-14 | 2016-12-14 | 上海麦风微波设备有限公司 | The microwave of a kind of coal gas is directly produced process and device |
| CN110172358A (en) * | 2019-06-27 | 2019-08-27 | 西安建筑科技大学 | A kind of pyrolysis atmosphere furnace and coal hydrogenation microwave-heating system and method |
| CN111944937A (en) * | 2019-05-14 | 2020-11-17 | 宝山钢铁股份有限公司 | Preparation method of carbon-iron composite furnace charge |
| CN113637496A (en) * | 2020-04-27 | 2021-11-12 | 宝山钢铁股份有限公司 | Microwave heating-based coking method |
| CN114058386A (en) * | 2020-07-30 | 2022-02-18 | 宝山钢铁股份有限公司 | Blast furnace injection coupling method based on microwave heating coking surplus gas |
-
2009
- 2009-07-03 CN CNA2009100231927A patent/CN101591549A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103160325A (en) * | 2011-12-14 | 2013-06-19 | 上海麦风微波设备有限公司 | Technological method for direct production of coal gas by microwaves and device |
| CN103160325B (en) * | 2011-12-14 | 2016-12-14 | 上海麦风微波设备有限公司 | The microwave of a kind of coal gas is directly produced process and device |
| CN111944937A (en) * | 2019-05-14 | 2020-11-17 | 宝山钢铁股份有限公司 | Preparation method of carbon-iron composite furnace charge |
| CN110172358A (en) * | 2019-06-27 | 2019-08-27 | 西安建筑科技大学 | A kind of pyrolysis atmosphere furnace and coal hydrogenation microwave-heating system and method |
| CN113637496A (en) * | 2020-04-27 | 2021-11-12 | 宝山钢铁股份有限公司 | Microwave heating-based coking method |
| CN114058386A (en) * | 2020-07-30 | 2022-02-18 | 宝山钢铁股份有限公司 | Blast furnace injection coupling method based on microwave heating coking surplus gas |
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Application publication date: 20091202 |