CN1042373A - Prepare water coal slurry fuel process with coal separating plant's duff - Google Patents
Prepare water coal slurry fuel process with coal separating plant's duff Download PDFInfo
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- CN1042373A CN1042373A CN 88107413 CN88107413A CN1042373A CN 1042373 A CN1042373 A CN 1042373A CN 88107413 CN88107413 CN 88107413 CN 88107413 A CN88107413 A CN 88107413A CN 1042373 A CN1042373 A CN 1042373A
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Abstract
The present invention relates to a kind of coal separating plant's Bed for Fine Coal or coal slime utilized and prepare Industrial Boiler and Industrial Stoves high-concentration coal-water slurry fuel engineering.High-concentration coal-water slurry is the fuel of oily usefulness of generation, and all using Coarse Coal at present both at home and abroad is raw material, and broken several times because of needs, so operation is many, energy consumption is big, the cost height.Bed for Fine Coal or coal slime that the present invention utilizes coal separating plant to produce are raw material, save pulverizing process, and be simple and easy to do in the control to the coal slurry size-grade distribution, less investment, and cost is low, and quality product meets 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 burn with stable ignition, 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, after pulverizing, ore grinding reach the desired particle size distribution, 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 the material feeding end 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:
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 pulping raw material, 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 coal water slurry fuel technological process of production figure.
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 duff prepares the technology of high-concentration coal-water slurry fuel, it is characterized in that, as coal separating plant's Bed for Fine Coal of pulping raw material or coal slime after dehydration, adding dispersion agent stirs, pinches and blend together the coal slurry with preliminary flowability, under the high density condition, grind then, and the adding stablizer, shear through high density again, promptly can be made into high-concentration coal-water slurry fuel.
2, a kind of slurries production technology described in claim 1 is characterized in that pulping raw material size-grade distribution at different levels must meet the requirement of following formula:
N value in the formula is controlled between 0.6～1.3, and optimum value is 0.7～0.8.
3, a kind of slurries production technology described in claim 1 is characterized in that making the discharge of pinching mixing device to return its material feeding end of part adding 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 in pinching mixing device the sulfonate that adds humate or naphthalene makes dispersion agent, and to improve 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 true CN1042373A (en) | 1990-05-23 |
| CN1021514C CN1021514C (en) | 1993-07-07 |
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ID=4834629
Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1021514C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724478A (en) * | 2008-10-15 | 2010-06-09 | 周国君 | Coal water slurry and concentrate thereof |
| 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 |
| 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 |
| 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 |
| CN107057788A (en) * | 2017-05-31 | 2017-08-18 | 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 |
| US10287522B2 (en) | 2013-01-31 | 2019-05-14 | General Electric Company | System and method for preparing coal water slurry |
| CN110218594A (en) * | 2019-06-12 | 2019-09-10 | 大同煤矿集团有限责任公司 | A kind of system and method for the clay standby pneumatic type water-coal-slurry of high-ash-fusion coal |
| 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 |
-
1988
- 1988-10-31 CN CN 88107413 patent/CN1021514C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724478A (en) * | 2008-10-15 | 2010-06-09 | 周国君 | Coal water slurry and concentrate thereof |
| CN101724478B (en) * | 2008-10-15 | 2013-10-02 | 周国君 | Coal water slurry and concentrate thereof |
| US10287522B2 (en) | 2013-01-31 | 2019-05-14 | General Electric Company | System and method for preparing coal water 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 |
| CN107057788A (en) * | 2017-05-31 | 2017-08-18 | 中煤科工清洁能源股份有限公司 | A kind of preparation method of high-concentration coal mud |
| 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 |
| CN110218594A (en) * | 2019-06-12 | 2019-09-10 | 大同煤矿集团有限责任公司 | A kind of system and method for the clay standby pneumatic type water-coal-slurry of high-ash-fusion coal |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1021514C (en) | 1993-07-07 |
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