CN105255535A - Preparation method of environment-friendly briquette coal and environment-friendly briquette coal prepared by method - Google Patents
Preparation method of environment-friendly briquette coal and environment-friendly briquette coal prepared by method Download PDFInfo
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- CN105255535A CN105255535A CN201510731023.4A CN201510731023A CN105255535A CN 105255535 A CN105255535 A CN 105255535A CN 201510731023 A CN201510731023 A CN 201510731023A CN 105255535 A CN105255535 A CN 105255535A
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Abstract
The invention provides a preparation method of environment-friendly briquette coal. The preparation method comprises the following steps: mixing bentonite, quick lime and cement to prepare a binding agent; crushing a raw material and mixing the binding agent with the raw material; briquetting to prepare a semi-finished product, wherein the raw material is semi-coke with the moisture content of 15wt% to 20wt%; drying the semi-finished product to obtain a finished product. The invention further provides the environment-friendly briquette coal; the content of fixed carbon is 90% to 95%, the content of volatile components is smaller than or equal to 2%, the content of ash is smaller than or equal to 3%, the content of sulfur is smaller than or equal to 0.3% and the content of moisture is smaller than or equal to 5%. The method provided by the invention has a simple flow and short working time; the environment-friendly level and the clean production level are high. The environment-friendly briquette coal provided by the invention has stable performances and high heat efficiency.
Description
Technical field
The present invention relates to clearer production technology field, concrete, the present invention relates to the preparation method of environment-friendly type moulded coal.
Background technology
Environment-friendly type moulded coal is more abundant than burning loose coal combustion, and thermo-efficiency is high, can decreasing pollution thing quantity discharged, improves resource utilization, promote and development moulded coal both economy present reality again, be the effective way solving scatter fire of raw coal pollution problem and improve thermo-efficiency.At present under the background that topsoil situation is day by day serious, carry out the research of new section coal technology, have a extensive future.
At present, the technique about environment-friendly type briquette production has a lot, and it is drawn materials and is mostly selected from coal gangue, or low-calorie coal resources, and ingredient origin is difficult to ensure the quality of products, and is difficult to extensive, quality stability.The present invention selects blue charcoal as main raw material, can ensure the stability of product, and itself belongs to industrialization, mass-producing product, this kind of technique due to blue charcoal, is more convenient for, in the area of rich coal resources, carrying out scale operation.
Summary of the invention
Technical problem to be solved by this invention is: for the problems existed in current environment-friendly type briquette production, the environment-friendly type moulded coal providing a kind of preparation method of environment-friendly type moulded coal and prepared by the method.
On the one hand, the invention provides a kind of preparation method of environment-friendly type moulded coal, described method comprises the steps:
(1) be that 2.5-3.5:1.5-2.5:0.5-1.5 (preferred 3:2:1) mixes and prepares binding agent by wilkinite, unslaked lime and cement according to weight ratio;
(2), after carrying out fragmentation to raw material, be the binding agent that 1:10-1:15 mixes step (1) and prepares in raw material according to the weight ratio of binding agent and raw material, after stirring, work in-process made by briquetting; Wherein, described raw material is blue charcoal, or dry cow dung and coal gangue are the material that 1:2-1:2.5 is mixed to get according to weight ratio;
(3) work in-process step (2) prepared are dried and are obtained finished product.
Aforesaid preparation method, in step (2), the blue charcoal of described blue charcoal to be water ratio be 15-20wt%.
Aforesaid preparation method, in step (2), after carrying out fragmentation, sieves raw material, is less than in the raw material of 5mm the binding agent mixing step (1) and prepare to particle diameter.
Aforesaid preparation method, in step (2), mix binding agent in raw material after, stirs 20-30min with the speed of 100-120r/min.
Aforesaid preparation method, in step (2), the carbon content of described coal gangue is 4-6wt%.
Aforesaid preparation method, in step (3), bake out temperature is 150-200 DEG C, and drying time is 4-6 hour.
Aforesaid preparation method, step (2) and step (3) carry out dust removal process respectively, and the dedusting ash obtained stirs with binding agent together with the raw material after fragmentation, work in-process prepared by briquetting.
On the other hand, the invention provides a kind of environment-friendly type moulded coal, by weight percentage, fixed carbon content 90%-95%, volatile content≤2%, ash oontent≤3%, sulphur content≤0.3%, water content≤5%.
Aforesaid environment-friendly type moulded coal, the ratio resistance >=3500 μ Ω M of described environment-friendly type moulded coal.
Again on the one hand, the invention provides the environment-friendly type moulded coal prepared by aforesaid method, by weight percentage, fixed carbon content 90%-95%, volatile content≤2%, ash oontent≤3%, sulphur content≤0.3%, water content≤5%.
Aforesaid environment-friendly type moulded coal, the ratio resistance >=3500 μ Ω M of described environment-friendly type moulded coal.
The preparation method of environment-friendly type moulded coal provided by the present invention is applicable to production and the application of environment-friendly type new forms of energy, and energy structure is improved in the area serious for topsoil, controls coal consumption amount, has positive effect.
Accompanying drawing explanation
Fig. 1 is the schema of the inventive method.
Embodiment
Moulded coal take coal dust as main raw material, by proportioning, physical strength and shape size required by concrete purposes, machined compression moulding, there is some strength and size and different coal finished product.So-called environment-friendly type moulded coal, mainly improves from the aspect such as combustion type, source moulded coal.With regard to combustion type, environment-friendly type moulded coal changes loose burning form, thus burning is more abundant, and thermo-efficiency is higher, and can the discharge of decreasing pollution thing; With regard to source, environment-friendly type moulded coal is mainly derived from blue charcoal, than coal gangue and biomaterial environmental protection more, even if be wherein doped with coal gangue and biomaterial, on the whole also than coal gangue common on the market and biomaterial environmental protection.
Wilkinite is primarily of moisture aluminium silicate mineral composition, and the nonmetallic minerals of to be essential mineral be montmorillonite, its main chemical compositions is SiO
2, Al
2o
3and H
2o, also has a small amount of FeO, Fe in addition
2o
3, MgO, CaO, Na
2o, K
2o and TiO
2deng.
The main component of unslaked lime is calcium oxide, and it is white, grey or palm fibre white, amorphous, easily absorbs moisture and carbonic acid gas in atmosphere.
Cement is powdery hydraulicity inorganic coagulation material, adds water after stirring into slurry and can harden in air or water, in order to the loose material such as sand, stone is cemented to mortar or concrete.Specific to the present invention, preferably No. 200-No. 300 cement (namely intensity is the cement of 20Mpa-30Mpa).
Blue charcoal is also known as semicoke, coke powder, it is a kind of carbon materials, percentage, its fixed carbon content > 82%, volatile content < 4%, ash oontent < 6%, sulphur content < 0.3%, water content < 10%.
Coal gangue refers to the solid waste discharged in coal mining process and coal washing process, and be a kind of black gray expandable rock lower, harder than coal with the carbon content of coal seam association in coalification course, its main component is Al
2o
3and SiO
2, also contain the Fe that quantity does not wait in addition
2o
3, CaO, MgO, Na
2o, K
2o, P
2o
5, SO
3with micro-rare elements (gallium, vanadium, titanium, cobalt).
In order to fully understand object of the present invention, feature and effect, by following embodiment, the present invention is elaborated.Processing method of the present invention is except following content, and all the other all adopt ordinary method or the device of this area.
Method of the present invention comprises the steps:
(1) preparation of binding agent
Be that 2.5-3.5:1.5-2.5:0.5-1.5 mixes and prepares binding agent by wilkinite, unslaked lime and cement according to weight ratio.The component of binding agent and the content of component have important impact to subsequent forming step, the weight ratio of wilkinite, unslaked lime and cement is limited to 2.5-3.5:1.5-2.5:0.5-1.5 by the present invention, thus lump the shaping ratio reaching the environment-friendly type moulded coal that subsequent production requires after boning with this binding agent more than 90% (weight), particularly, when the weight ratio of wilkinite, unslaked lime and cement is 3:2:1, lump the shaping ratio reaching the environment-friendly type moulded coal that subsequent production requires after boning with this binding agent more than 95% (weight).
(2) fragmentation of raw material and half-finished preparation
In the present invention, raw material storage, in totally-enclosed stock yard, adopts Fully-mechanized conveyor to transport raw material.The blue charcoal of can be water ratio the be 15-20wt% of the raw material in the present invention, or dry cow dung and coal gangue (carbon content is 4-6wt%) they are the material that 1:2-1:2.5 is mixed to get according to weight ratio.Preferably, take water ratio as the blue charcoal of 15-20wt% be raw material, on the one hand, compared to the moulded coal that other is originated, there is thermo-efficiency as the moulded coal of raw material using blue charcoal high, sulfurous gas and the little advantage of emission of nitrogen oxide amount, on the other hand, the water ratio of blue charcoal is 15-20wt%, significantly can reduce the investment of drying plant, there is good economic benefit.
In process of production, raw material adopts Fully-mechanized conveyor to be transported to crusher, carry out fragmentation, be transported to sieve apparatus subsequently to sieve, particle diameter is less than the feedstock transportation of 5mm in post-type mixer, be that 1:10-1:15 adds binding agent according to the weight ratio of binding agent and raw material, stir 20-30min with the speed of 100-120r/min, it is again broken that Large stone raw material returns crusher.After raw material mixes with binding agent, enter briquetting press via inclined loading screw feeder, be shaped to work in-process.
(3) dry
Work in-process enter dryer by briquetting press, dry 4-6 hour, thus obtain environment-friendly type moulded coal at 150-200 DEG C.
In the above-mentioned methods, step (2) and (3) are provided with dust-removal system respectively, thus make dedusting ash return in production system, not outer row.Particularly, respectively at sieve apparatus and dryer configuration sack cleaner, the dedusting ash that sieve apparatus is collected through sack cleaner enters post-type mixer, and the dedusting ash that dryer is collected through sack cleaner returns dryer.
Method flow of the present invention is simple, and the activity duration is short, and involved equipment is connected smooth, is easy to realize; The raw material that method of the present invention adopts is common, facility of drawing materials; Method Environmental Protection Level of the present invention and level of clean production high, waste water involved in production process, discarded, solid waste are all effectively disposed, and whole recycle, economic value added is high.
The environment-friendly type moulded coal that method of the present invention obtains, by weight percentage, fixed carbon content 90%-95%, volatile content≤2%, ash oontent≤3%, sulphur content≤0.3%, water content≤5%.Further, its ratio resistance >=3500 μ Ω M.Ratio resistance, mainly weighs the conductivity of solid substances, and have impact to dust collection when caking, production, numerical value is higher, and the dust diffusivity produced in production is lower, thus is more conducive to collecting.Ratio resistance >=3500 μ Ω the M of environment-friendly type moulded coal of the present invention, illustrates that dust produced aborning other moulded coal more existing is more easily collected, thus simplifies production process, reduce the requirement to equipment.
Owing to adopting blue charcoal to be raw material, its carbon content is high, and some flows out in byproduct in rectifying for nitrogen and sulphur, therefore compared to existing moulded coal, environment-friendly type moulded coal thermo-efficiency of the present invention is high, sulfurous gas and emission of nitrogen oxide amount little.
Mode below by embodiment further illustrates the present invention, but does not therefore limit the present invention among described scope of embodiments.The experimental technique of unreceipted actual conditions in the following example, conventionally and condition, or selects according to catalogue.The material used in embodiment is conventional commercial obtaining.
Embodiment 1
(1) be that 3:2:1 mixes and prepares binding agent by wilkinite, unslaked lime and cement according to weight ratio.
(2) blue carbon feedstock adopts Fully-mechanized conveyor to be transported to crusher, carry out fragmentation, be transported to sieve apparatus subsequently to sieve, the blue carbon feedstock that particle diameter is less than 5mm is delivered in post-type mixer, and add binding agent, the weight ratio of binding agent and blue charcoal is 1:10, and stir 20min with the speed of 120r/min, it is again broken that Large stone raw material returns crusher.After blue carbon feedstock mixes with binding agent, enter briquetting press via inclined loading screw feeder, be shaped to work in-process.
(3) dry
Work in-process enter dryer by briquetting press, dry 6 hours, thus obtain environment-friendly type moulded coal 1#, measure, specifically in table 1 its significant parameter at 150 DEG C.
Embodiment 2
(1) be that 2.5:1.5:0.5 mixes and prepares binding agent by wilkinite, unslaked lime and cement according to weight ratio.
(2) blue carbon feedstock adopts Fully-mechanized conveyor to be transported to crusher, carry out fragmentation, be transported to sieve apparatus subsequently to sieve, the blue carbon feedstock that particle diameter is less than 5mm is delivered in post-type mixer, and add binding agent, the weight ratio of binding agent and blue charcoal is 1:15, and stir 30min with the speed of 100r/min, it is again broken that Large stone raw material returns crusher.After blue carbon feedstock mixes with binding agent, enter briquetting press via inclined loading screw feeder, be shaped to work in-process.
(3) dry
Work in-process enter dryer by briquetting press, dry 4 hours, thus obtain environment-friendly type moulded coal 2#, measure, specifically in table 1 its significant parameter at 200 DEG C.
Embodiment 3
(1) be that 3.5:2.5:1.5 mixes and prepares binding agent by wilkinite, unslaked lime and cement according to weight ratio.
(2) blue carbon feedstock adopts Fully-mechanized conveyor to be transported to crusher, carry out fragmentation, be transported to sieve apparatus subsequently to sieve, the blue carbon feedstock that particle diameter is less than 5mm is delivered in post-type mixer, and add binding agent, the weight ratio of binding agent and blue charcoal is 1:12, and stir 30min with the speed of 110r/min, it is again broken that Large stone raw material returns crusher.After blue carbon feedstock mixes with binding agent, enter briquetting press via inclined loading screw feeder, be shaped to work in-process.
(3) dry
Work in-process enter dryer by briquetting press, dry 3 hours, thus obtain environment-friendly type moulded coal 3#, measure, specifically in table 1 its significant parameter at 280 DEG C.
Table 1
| 1# | 2# | 3# | |
| Fixed carbon content (wt%) | 95 | 90 | 93 |
| Volatile content (wt%) | 1.2 | 2 | 1.5 |
| Ash oontent (wt%) | 1.8 | 3 | 2.2 |
| Sulphur content (wt%) | 0.1 | 0.3 | 0.2 |
| Ratio resistance (Ω M) | 4000 | 3500 | 3800 |
Claims (11)
1. a preparation method for environment-friendly type moulded coal, is characterized in that, described method comprises the steps:
(1) be that 2.5-3.5:1.5-2.5:0.5-1.5 (preferred 3:2:1) mixes and prepares binding agent by wilkinite, unslaked lime and cement according to weight ratio;
(2), after carrying out fragmentation to raw material, be the binding agent that 1:10-1:15 mixes step (1) and prepares in raw material according to the weight ratio of binding agent and raw material, after stirring, work in-process made by briquetting; Wherein, described raw material is blue charcoal, or dry cow dung and coal gangue are the material that 1:2-1:2.5 is mixed to get according to weight ratio;
(3) work in-process step (2) prepared are dried and are obtained finished product.
2. preparation method according to claim 1, is characterized in that, in step (2), and the blue charcoal of described blue charcoal to be water ratio be 15-20wt%.
3. preparation method according to claim 1 and 2, is characterized in that, in step (2), after carrying out fragmentation, sieves raw material, is then less than in the raw material of 5mm the binding agent mixing step (1) and prepare to particle diameter.
4. the preparation method according to any one of claim 1-3, is characterized in that, in step (2), mix binding agent in raw material after, stirs 20-30min with the speed of 100-120r/min.
5. the preparation method according to any one of claim 1-4, is characterized in that, in step (2), the carbon content of described coal gangue is 4-6wt%.
6. the preparation method according to any one of claim 1-5, is characterized in that, in step (3), bake out temperature is 150-200 DEG C, and drying time is 4-6 hour.
7. the preparation method according to any one of claim 1-6, it is characterized in that, step (2) and step (3) carry out dust removal process respectively, and the dedusting ash obtained stirs with binding agent together with the raw material after fragmentation, work in-process prepared by briquetting.
8. an environment-friendly type moulded coal, is characterized in that, by weight percentage, and fixed carbon content 90%-95%, volatile content≤2%, ash oontent≤3%, sulphur content≤0.3%, water content≤5%.
9. environment-friendly type moulded coal according to claim 8, is characterized in that, the ratio resistance >=3500 μ Ω M of described environment-friendly type moulded coal.
10. the environment-friendly type moulded coal that the method described in any one of claim 1-7 prepares, is characterized in that, by weight percentage, and fixed carbon content 90%-95%, volatile content≤2%, ash oontent≤3%, sulphur content≤0.3%, water content≤5%.
11. environment-friendly type moulded coals according to claim 10, is characterized in that, the ratio resistance >=3500 μ Ω M of described environment-friendly type moulded coal.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106590791A (en) * | 2016-11-30 | 2017-04-26 | 神雾环保技术股份有限公司 | Semi-coke powder molding method |
| CN114921274A (en) * | 2022-05-24 | 2022-08-19 | 昆明理工大学 | Preparation process for preparing fuel block by using household garbage |
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|---|---|---|---|---|
| CN101445756A (en) * | 2008-11-21 | 2009-06-03 | 杨兴平 | Method for producing moulded coal by oil-rich coal with low-ash low-sulfur low-phosphor and high-heat productivity |
| CN104479782A (en) * | 2014-12-12 | 2015-04-01 | 三门峡中兴节能环保科技有限公司 | Briquette coal used for burning lime in blast furnace and prepared from semi coke powder as main material and preparation method of briquette coal |
| JP5762653B1 (en) * | 2015-01-29 | 2015-08-12 | 新日鉄住金エンジニアリング株式会社 | Coal charcoal, method for producing the same, and method of using charcoal |
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2015
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101445756A (en) * | 2008-11-21 | 2009-06-03 | 杨兴平 | Method for producing moulded coal by oil-rich coal with low-ash low-sulfur low-phosphor and high-heat productivity |
| CN104479782A (en) * | 2014-12-12 | 2015-04-01 | 三门峡中兴节能环保科技有限公司 | Briquette coal used for burning lime in blast furnace and prepared from semi coke powder as main material and preparation method of briquette coal |
| JP5762653B1 (en) * | 2015-01-29 | 2015-08-12 | 新日鉄住金エンジニアリング株式会社 | Coal charcoal, method for producing the same, and method of using charcoal |
Non-Patent Citations (1)
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| 徐振刚等: "《型煤技术》", 30 November 2001 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106590791A (en) * | 2016-11-30 | 2017-04-26 | 神雾环保技术股份有限公司 | Semi-coke powder molding method |
| CN114921274A (en) * | 2022-05-24 | 2022-08-19 | 昆明理工大学 | Preparation process for preparing fuel block by using household garbage |
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Address after: 27 Shandong City, Qingdao Province Economic and Technological Development Zone, Ali Shan Road, No. 27, unit 1 Applicant after: Zhongye Dongfang Engineering Techn Co., Ltd. Address before: 014010 the Inner Mongolia Autonomous Region Baotou City Queensland Steel Street No. 45 Applicant before: Zhongye Dongfang Engineering Techn Co., Ltd. |
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