CN1039347C - Process for manufacturing composite solid fuel from coal and vegetable material - Google Patents
Process for manufacturing composite solid fuel from coal and vegetable material Download PDFInfo
- Publication number
- CN1039347C CN1039347C CN93104650A CN93104650A CN1039347C CN 1039347 C CN1039347 C CN 1039347C CN 93104650 A CN93104650 A CN 93104650A CN 93104650 A CN93104650 A CN 93104650A CN 1039347 C CN1039347 C CN 1039347C
- Authority
- CN
- China
- Prior art keywords
- coal
- solid fuel
- compression
- briquette
- composite solid
- 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.)
- Expired - Fee Related
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Classifications
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
A process for producing a composite solid fuel comprising mixing vegetable powder such as wood, bagasse and analog with a coal powder to prepare a feedstock and subjecting the same to compression molding in a roll press, wherein when the feed coal has a Hardgrove grindability index of about 50 or more, the roll bearing pressure of the press is adjusted to 6t/cm or less, while when the coal used has the index of about 50 or less, the pressure is adjusted to 8t/cm or less. Therefore the process prevents excessively high compressive force from being exerted on the briquette, thus avoiding breakage of the briquette, decreasing wear of the roll and hence reducing the equipment cost.
Description
The present invention relates to method with fine coal and comminuted plants material (for example, timber, bagasse and analogue) making composite solid fuel.
Much less, coal (comprising hard coal, bituminous coal, brown coal) has been used as the important fuel of various purposes for a long time.
The fine coal of the several millimeter-sized particles shapes that form when exploitation, transportation and ore dressing can be embossed in suitable adhesive, and uses as so-called coal briquette.
So-called grizzle, for example brown coal have very large reserves in the whole world, and, be widely used as cheap fuel, yet it contains the nearly higher ash content of 30% (by weight), because burning is bad, comparatively speaking, thermal value is low.In addition, this rudimentary coal produces a large amount of black smoke and cinder, and this cinder is formed by the ash content of fusing.
People advise above-mentioned rudimentary granular fine coal with do and comminuted plants material (for example timber, bagasse and analogue) mix mutually, if necessary, add tackiness agent, carry out mold pressing.
Above-mentioned composite solid fuel, normally make like this: by dry and be ground into chip coal and plant material respectively less than several millimeters, again they are mixed as far as possible equably, if desired, add tackiness agent again, this depends on the kind of plant, then this mixture is sent into moulding press, the coal briquette moulding press that for example has a pair of coact cylinder, the groove that has molded usefulness on the excircle of cylinder, by rotary worm or the screw rod in the hopper that is installed in the cylinder top, the raw material of making coal briquette is added in the moulding press.
Preferably to improve the physical strength of so compound coal briquette fuel, make and not broken easily in transit or pulverize, the volatile matter material (mainly being to emit during to about 400 ℃ low temperature at about 200 ℃) that also needs to burn is avoided the generation of dense smoke, this can finish by the plant material of burn low flash-point or kindling temperature, and improves burning of coal.In order to reach these purposes, people not only need to control the content ratio and the force of compression of two kinds of compositions, and will be scattered in the chip of plant material equably in the coal grain.
As everyone knows, the grindability of coal is relevant with the kind of coal usually with grindability index.When having the mixture of coal that the roller press of a pair of cylinder or briquetting press mold pressing pulverize and plant material, many pits or mould hole is arranged around the surface of each cylinder, if the coal that uses has lower crushing strength, promptly have higher Ha Degeluofu grindability index (HGI), so, just may mold pressing when relatively low effective force of compression, with the coal briquette product that compresses that obtains, this is because during mold pressing, coal is partly pulverized and is full of mixture intermediary gap.
Here, term " effectively force of compression " refers to and puts on along the merchant of the total compression power on the whole axial length direction of cylinder divided by the effective axial length gained that forms pit.
Yet when effective force of compression was too high, not only coal briquette was easy to fragmentation, and because surface abrasion, the work-ing life of cylinder is shorter.On the other hand, when the coal that uses has lower Ha Degeluofu grindability index (HGI), and when effectively force of compression is relatively low, because the gap in mixture is not filled, so, the coal briquette of formation is breakable more or less, and perhaps coal briquette can not form at all.When pressure was too high, the surface abrasion of cylinder must take in especially.
Therefore, an object of the present invention is to propose a kind of method of making that compress and composite solid fuel coal briquette that physical strength is arranged with coal of pulverizing and plant material.
According to the kind of the coal that uses, i.e. Ha Degeluofu grindability index is adjusted effective force of compression of drum extrusion, reaches this purpose, and this also is favourable to the wearing and tearing that reduce cylinder.
The present invention is based on following discovery: when the HGI of the coal that uses greater than 50 the time, effectively force of compression is confirmed as 6t/cm or littler, when the HGI of the coal that uses less than 50 the time, effectively force of compression is confirmed as 8t/cm or littler, therefore, the product that can obtain.According to the HGI of coal, can determine suitable effective force of compression.
For definite corresponding effectively force of compression that obtains the good coal briquette that compresses of composite solid fuel, the inventor had carried out a series of test, and it is as described below:
HGI being respectively 45,57 and 70 three kinds of coal A, B and C pulverizes, the wood chip (by weight) of adding 20%, and further add white lime as sweetening agent and molasses as tackiness agent, its amount was respectively for 5% and 10% (by weight), use have two relative cylinders (diameter of cylinder is 520mm and 800mm) roller press be respectively 3,4,5,6,7 and effective force of compression of the variation of 8t/cm carry out mold pressing to measure the crushing strength (kg) of the coal briquette that is obtained, its result is as shown in the table:
Table
| The type of coal | HGI | Effective force of compression (t/cm) | |||||
| 3 | 4 | 5 | 6 | 7 | 8 | ||
| Coal A | 45 | Failure | 20 | 23 | 42 | 64 | 65 |
| Coal B | 55 | Failure | 46 | 83 | 84 | 82 | Broken |
| Coal C | 70 | 40 | 60 | 115 | 105 | Broken | Broken |
Here, failure means the impossible coal briquette that forms.
As shown above, with regard to the coal A of 45HGI, in effective force of compression is under the situation of 3t/cm, can not be molded as coal briquette, and be that 4t/cm is during to 8t/cm in effective force of compression, crushing strength is 20,23,42,64 and 65kg, this means that these coal briquettes can be used for stove, boiler and similar devices.The coal briquette that forms when 7t/cm and 8t/cm pressure is particularly preferred, resembles so normal hard processing of transportation because they can sustain.
When using the coal B of 55HGI, when effectively force of compression is 3t/cm, also can not make coal briquette, still, be that coal briquette that 4t/cm forms during to 7t/cm is enough to be applicable to stove, boiler and similar equipment thereof in effective force of compression.Concerning coal B, effective force of compression of 8t/cm is too high.
With regard to the coal C of 70HGI, the coal briquette in that 3t/cm forms during to the force of compression of 6t/cm is enough to bear transportation.But,, can not make coal briquette 7 with during effective force of compression of 8t/cm.
Therefore, can say so: when the HGI of the coal that uses less than 50 the time, effectively the force of compression maximum can reach 8t/cm, still, when the HGI of coal greater than 50 the time, effectively force of compression should be less than 6t/cm.
Comprehensive above-mentioned conclusion: if the HGI value of the coal of known use so just can be selected a preferable effective force of compression, and then the wearing and tearing of reduction cylinder surface, and prolong the cylinder life-span.
Claims (3)
1. with the method for coal of pulverizing and vegetable matter making composite solid fuel, it comprises: these two kinds of materials are carried out drying and pulverizing respectively, mix this two kinds of chippy materials equably, and this mixture is carried out mold pressing; It is characterized in that, described mold pressing is to carry out in the drum-type press, when the Ha Degeluofu grindability index of the coal that uses greater than 50 the time, the working pressure of drum-type press is 6t/cm or littler, and when the Ha Degeluofu grindability index less than 50 the time, drum-type press working pressure is 8t/cm or littler, and the content of vegetable matter is 20～25 weight % in the described mixture.
2. as in the method described in the claim 1, it is characterized in that: described vegetable matter is timber or bagasse.
3. the method described in claim 1 or 2 is characterized in that: add white lime respectively as sweetening agent, add molasses as tackiness agent, the amount of adding is respectively 5 weight % and 10 weight %.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16915592A JPH069974A (en) | 1992-06-26 | 1992-06-26 | Production of composite solid fuel consisting of coal and vegetable matter |
| JP169155/92 | 1992-06-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1080949A CN1080949A (en) | 1994-01-19 |
| CN1039347C true CN1039347C (en) | 1998-07-29 |
Family
ID=15881309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93104650A Expired - Fee Related CN1039347C (en) | 1992-06-26 | 1993-03-29 | Process for manufacturing composite solid fuel from coal and vegetable material |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH069974A (en) |
| CN (1) | CN1039347C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006282934A (en) * | 2005-04-04 | 2006-10-19 | Nippon Steel Corp | Solid fuel and its production method |
| KR101405478B1 (en) * | 2012-12-26 | 2014-06-11 | 주식회사 포스코 | Method for manufacturing coal bruquettes and apparatus for the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5049163A (en) * | 1988-12-28 | 1991-09-17 | Briquetting Research And Design Institute, Beijing Graduate School Of China University Of Mining And Technology | Process for reducing sulphur dioxide emission from burning coal containing sulphur |
-
1992
- 1992-06-26 JP JP16915592A patent/JPH069974A/en not_active Withdrawn
-
1993
- 1993-03-29 CN CN93104650A patent/CN1039347C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5049163A (en) * | 1988-12-28 | 1991-09-17 | Briquetting Research And Design Institute, Beijing Graduate School Of China University Of Mining And Technology | Process for reducing sulphur dioxide emission from burning coal containing sulphur |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1080949A (en) | 1994-01-19 |
| JPH069974A (en) | 1994-01-18 |
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| CF01 | Termination of patent right due to non-payment of annual fee |