CN1021514C - Process for production of coal-water slurry fuel using coal fines from coal washing plant - Google Patents
Process for production of coal-water slurry fuel using coal fines from coal washing plant Download PDFInfo
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- CN1021514C CN1021514C CN 88107413 CN88107413A CN1021514C CN 1021514 C CN1021514 C CN 1021514C CN 88107413 CN88107413 CN 88107413 CN 88107413 A CN88107413 A CN 88107413A CN 1021514 C CN1021514 C CN 1021514C
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- Prior art keywords
- coal
- slurry
- water slurry
- production technology
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- 239000003245 coal Substances 0.000 title claims abstract description 55
- 239000002002 slurry Substances 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000000446 fuel Substances 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title abstract description 12
- 238000005406 washing Methods 0.000 title abstract description 5
- 239000003250 coal slurry Substances 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 10
- 238000009826 distribution Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000006185 dispersion Substances 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000004537 pulping Methods 0.000 claims description 5
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 4
- 238000010008 shearing Methods 0.000 claims description 3
- 238000005189 flocculation Methods 0.000 claims description 2
- 230000016615 flocculation Effects 0.000 claims description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 3
- 238000005065 mining Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000010802 sludge Substances 0.000 abstract 2
- 239000000047 product Substances 0.000 description 13
- 241000196324 Embryophyta Species 0.000 description 8
- 238000010298 pulverizing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
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- Liquid Carbonaceous Fuels (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The present invention refers to a process for producing a high concentration coal-water slurry fuel for industrial boilers and kilns by using fine coal particles or coal sludge from coal washing plants. The high concentration coal-water slurry is a fuel for substituting oil. At present, the coarse coal particles are used as raw materials at home and abroad. Because the coarse coal particles need to be crushed several times, lots of working procedures need to be carried out, the energy consumption is high, and the cost is high. The present invention uses the fine coal particles or coal sludge produced in the coal separating plants as the raw material, and therefore, the crushing procedure is not needed, which is simple and convenient for controlling the particle size distribution of the coal slurry. The present invention has the advantages of less investment and low cost, and the production quality satisfies the requirements.
Description
The present invention relates to a kind of coal separating plant that utilizes and return the technology that beans or coal slime prepare Industrial Boiler and kiln high-concentration coal-water slurry fuel.
High-concentration coal-water slurry fuel contains coal 65～75%, have with oil fuel similarly mobile, can storage, pumping, atomizing and stable ignition fuel, a kind ofly be suitable for Industrial Boiler and kiln uses, the ideal fuels of replace oil with coal.
It is raw material that domestic and international at present preparation high-concentration coal-water slurry technology is all used the Coarse Coal of the granularity upper limit 50～13mm, reach desired particle size through pulverizing, ore grinding and distribute, promptly make coal water slurry (Japanese Patent J59045395, J59081390 and J60156796) with addition of an amount of additive again.
The fragmentation and the pulverizing process of this pulping process are many, and energy consumption is big, the cost height.
Purpose of the present invention is that Bed for Fine Coal or the coal slime of utilizing coal separating plant to produce prepares high-concentration coal-water slurry fuel for Industrial Boiler and Industrial Stoves burning usefulness, with fuel economy oil, and improves the economic benefit of coal separating plant.
Main contents of the present invention are as follows:
Bed for Fine Coal or coal slime dehydration in advance with raw material-coal separating plant.Moisture is product and the dispersant that can improve the coal slurry flowability after 28～35% the dehydration, is pumped into and pinches mixed (referring to accompanying drawing) in the double-shaft spiral stirrer.The kind of dispersion agent and consumption according to different coals, are determined by experimental study in advance.The used dispersion agent of the present invention is the sulfonate of known humate or naphthalene, and consumption is 0.2～1.5%, and optimum value is 0.3～1.0%.For raising the efficiency, about 10% the mixed product of pinching must be returned an end of giving of pinching mixing device, pinch mixed again with new raw material.The product coal slurry of pinching after mixing has had preliminary flowability.
Pinch mixed product and be pumped in the vibromill, under the condition of high density, grind with spiral pump.The granularity upper limit of grinding the back coal slurry is controlled at 200～300 μ, wherein is not less than 70% less than 200 purpose content.Be to improve the flowability of coal water slurry, also specific requirement should be arranged to the size-grade distribution of coal slurry, otherwise even add dispersion agent, the flowability of coal slurry can not reach requirement yet.
The ratio (being size-grade distribution) of grinding each particle size fraction of back coal slurry must meet the following formula requirement.
R=100×e
-( (D)/(Dm) )
n
D-sieve size in the formula, μ;
The R-granularity is greater than the content of D, %;
D
M-screen overflow content is 36.7% o'clock granularity, μ.
The controlling valu of n is 0.6～1.3, and the optimum value of n is 0.7～0.8.
For the size-grade distribution that guarantees product meets the requirements, also the part of abrasive product must be fed back in the mill feed and regulate.Feedback quantity is no more than 30% at most.
For preventing that coal water slurry from producing precipitation during storing and transporting, need to add stablizer.Stablizer adopts known flocculation agent, adds in the abrasive product coal slurry, and consumption is generally 0.05～0.5% according to deciding the storage period of customer requirements.
Abrasive product coal slurry behind the adding stablizer is delivered to colloidal mill or is strengthened and carry out the high strength shearing in the pump, strengthens the effect of coal grain surface and additive, further improves the stability of coal slurry.
Last procedure is that super grain is checked.Coal slurry after high strength is sheared is exactly the coal water slurry fuel finished product behind colour strainer or test sieve eliminating foreign matter and super grain.
Principal feature of the present invention has four:
1. with Bed for Fine Coal or the direct slurrying of coal slime, save fragmentation, pulverizing process, process simplification, and the control method of size-grade distribution is simple and easy to do, and adaptability is strong, and quality product meets the requirements.
2. Bed for Fine Coal or the coal slime of utilizing coal separating plant to produce are made the former grain of slurrying, can lean against coal separating plant and build the pulp mill, less investment, found the factory fast, cost is low.
3. will sneak into high-moisture Bed for Fine Coal in the coal washing product separates and makes pulping raw material, both can improve the coal washing product quality, can prepare the higher coal water slurry fuel of value again, coal resources are obtained fully and reasonable use, and significantly improve the economic benefit of coal enterprise.
4. through retrieval, do not find the coal water slurry fuel production technique identical with the present invention.
Accompanying drawing 1 is produced process flow figure for coal water slurry fuel.
The slip house that utilizes the present invention to produce as a trial is pinched mixed operation and is selected the double-shaft spiral stirrer for use, and grinding step is selected ZM1200 type vibromill for use, and high strength cutting operation is selected colloidal mill for use, and super grain inspection is selected BY1000 type colour strainer for use.
Pulping raw material is coal separating plant's floatation clean coal filter cake, and moisture 30～35% is limited to 0.5mm on the granularity.Adopt the technical process slurrying of accompanying drawing.Dispersant dosage 0.8%, stabilizing agent dosage 0.2%.The coal water slurry of making uses for Industrial Boiler and steel rolling steel ingot heater, has obtained good result.
The quality index of the coal water slurry finished product of making is as follows:
1. ash content of coal 8～9%
2. water coal slurry concentration 68 ± 2%
3. viscosity in aqueous coal slurries＜1500cp
4. water coal slurry stability was above 3 months
5. the coal grain granularity upper limit 280 μ in the coal water slurry
In the coal water slurry less than 200 order content greater than 80%
Claims (6)
1, a kind of technology for preparing high-concentration coal-water slurry fuel with duff, it is characterized in that, as the Bed for Fine Coal or the coal slime of the coal separating plant (or mining area) of pulping raw material, after dewatering, add dispersion agent and stir, pinch and blend together coal slurry with preliminary flowability, part is pinched and is mixed product and return material feeding end; The coal slurry of pinching after mixing grinds under the high density condition, and the part abrasive product returns the mill feed end and regrinds, and grinds the back and adds stablizer and through the high strength shearing, promptly can be made into high-concentration coal-water slurry fuel.
2, a kind of slurries production technology described in claim 1, it is characterized in that pulping raw material, particularly the coal slurry product must have size-grade distribution preferably, promptly in following size-grade distribution formula, the n value should be controlled at 0.6～1.3 scope, and optimum value is 0.7～0.8.
R＝100×EXP[-（D/Dm）
n]，%
The particle diameter of each grade of D-in the formula, μ;
The R-granularity is greater than the part content of D, %,
The model parameter of Dm-reflection material thickness, it is equivalent to screen overflow content is 36.7% o'clock particle diameter, μ;
The model parameter of n-reflection particle size distribution characteristics.
3, a kind of slurries production technology described in claim 1 is characterized in that making the discharge of pinching mixing device to return part adding material feeding end and mixes with dehydrated raw material, pinches mixed efficient with raising, the fractional flow that returns about 10%.
4, a kind of slurries production technology described in claim 1 is characterized in that the sulfonate that adds humate or naphthalene in pinching mixing device makes dispersion agent, and to put forward the flowability of coal slurry, consumption depends on coal, and is about 0.2～1.5, and optimum value is 0.3～1.0%.
5, a kind of slurries production technology described in claim 1 is characterized in that and a part of abrasive product coal slurry need be fed back in the grinding plant feed, meets processing requirement with the size-grade distribution that guarantees coal slurry, and feedback quantity is no more than 30%.
6, a kind of slurries production technology described in claim 1 is characterized in that adding the stablizer that flocculation agent is made coal slurry in the high strength shearing device, and consumption is 0.05～0.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88107413 CN1021514C (en) | 1988-10-31 | 1988-10-31 | Process for production of coal-water slurry fuel using coal fines from coal washing plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88107413 CN1021514C (en) | 1988-10-31 | 1988-10-31 | Process for production of coal-water slurry fuel using coal fines from coal washing plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1042373A CN1042373A (en) | 1990-05-23 |
| CN1021514C true CN1021514C (en) | 1993-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88107413 Expired - Fee Related CN1021514C (en) | 1988-10-31 | 1988-10-31 | Process for production of coal-water slurry fuel using coal fines from coal washing plant |
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| CN (1) | CN1021514C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724478B (en) * | 2008-10-15 | 2013-10-02 | 周国君 | Coal water slurry and concentrate thereof |
| CN103965981B (en) | 2013-01-31 | 2016-05-25 | 通用电气公司 | The apparatus and method of preparation water-coal-slurry |
| CN103242918A (en) * | 2013-05-16 | 2013-08-14 | 江苏神瑞新能源有限公司 | Method for preparing high-concentration water-coal slurry by using flotation clean coals |
| CN104893771A (en) * | 2014-08-05 | 2015-09-09 | 浙江煤科清洁能源有限公司 | Two-section medication water coal slurry preparation process |
| CN104711056A (en) * | 2015-03-26 | 2015-06-17 | 江苏秋林重工股份有限公司 | High-concentration combusting water-coal-slurry preparation technology |
| CN107057788B (en) * | 2017-05-31 | 2019-09-20 | 中煤科工清洁能源股份有限公司 | A kind of preparation method of high-concentration coal mud |
| CN109536223A (en) * | 2018-11-07 | 2019-03-29 | 南京楠达环保科技有限公司 | A kind of preparation method and production equipment of high concentration gasified coal water slurry |
| CN110218594B (en) * | 2019-06-12 | 2021-04-30 | 大同煤矿集团有限责任公司 | System and method for preparing gasification type coal water slurry from high ash fusion point coal slurry |
| CN113522529A (en) * | 2021-07-21 | 2021-10-22 | 山西阳煤国华选煤工程技术有限公司 | Anthracite ash reducing agent |
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1988
- 1988-10-31 CN CN 88107413 patent/CN1021514C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1042373A (en) | 1990-05-23 |
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