CN101711929A - Process for fully dehydrating coal under hydraulic coal mining well - Google Patents
Process for fully dehydrating coal under hydraulic coal mining well Download PDFInfo
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- CN101711929A CN101711929A CN200910175210A CN200910175210A CN101711929A CN 101711929 A CN101711929 A CN 101711929A CN 200910175210 A CN200910175210 A CN 200910175210A CN 200910175210 A CN200910175210 A CN 200910175210A CN 101711929 A CN101711929 A CN 101711929A
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Abstract
The invention discloses a process for fully dehydrating coal under a hydraulic coal mining well, belongs to the technical field of hydraulic coal mining production methods, and is used for realizing full dehydration and dry conveying and dry hoisting under the hydraulic coal mining well. The technical scheme is that: coal slurry from a hydraulic mining face enters a scraper and pit sizing-desliming screen firstly, block coal (more than 0.5-1.0mm) on the screen is dehydrated by a scraper conveyer provided with a sieve plate and then enters a coal bunker, and products under the screen overflow to a concentration bin; base flow in the concentration bin is pumped to a vibration curve screen and a high-frequency screen for dehydration, coarse slime (0.2 to 1.0mm) on the screens enters the coal bunker, and water under the screens flows back to the concentration bin; and the overflow in the concentration bin is mixed with a flocculating agent and then enters an inclined pipe settling bin, and the base flow fine slime (less than 0.2mm) in the inclined pipe settling bin is pumped to a pressure filter for dehydration and recovery. The invention adopts a three-stage dehydration process, full dehydration and dry conveying and dry hoisting under the hydraulic coal mining well are completely realized, a coal and water hoisting system and a ground dehydrating system are eliminated, and the process has the advantages of low investment cost and low total power of running equipment.
Description
Technical field
The present invention relates to the whole down-holes of coal dewatering process in a kind of hydraulic coal mining production, belong to hydraulic coal mining production method technical field.
Background technology
There are whole coals to promote two kinds of technologies in the classification of down-hole dehydration in the hydraulic coal mining production technology at full waterpower metallization processes and most of coal of ground dehydration.Wherein full waterpower lifting technology is that raw coal all is crushed to below a certain particle diameter in the down-hole, rise to the ground processed with the coarsegrain coal slime pump by pipeline, this process system complexity, the power consumption height, multistage coal slime pump technology is immature, and the life-span is short, the maintenance cost height, the plugging accident takes place in system easily, influences mine production.Most of coal is implemented for the shortcoming that overcomes full waterpower metallization processes in the classification lifting technology of down-hole dehydration, this technology in the down-hole with the coal separated into two parts, raw coal greater than a certain particle diameter is carried in down-hole dehydration drought fortune drought, coal less than a certain particle diameter rises to the ground processed with coal slime pump by pipeline, it is 1: 15～20 that this method water is put forward coal-water ratio, the upper and lower systemic circulation of industrial water well, the water power waste is serious, does not still have thoroughly to solve the problem that full waterpower metallization processes exists.
Summary of the invention
Technical problem to be solved by this invention provides a kind of hydromining coal down-hole process for fully dehydrating, realization coal all drought fortune droughts is carried, and reduces operating cost, and the while can be cancelled hydraulic hoisting system and ground coal dewatering system, realize hydromining system water down-hole round-robin, save water and energy.
The technical scheme that solves the problems of the technologies described above is:
A kind of process for fully dehydrating coal under hydraulic coal mining well, it is divided into lump coal dehydration, coarse slime dehydration and fine coal slurry and purifies three grades of operations of thickening, and this technology is undertaken by following step:
1. the coal slurry that gets off of hydromining working face is introduced into scraper plate and drags for hole classification dewatering screen, and (＞0.5～1.0mm) by having the scratch board conveyor of sieve plate, enters coal bunker after the dehydration, sieves low-grades and overflow to concentrated storehouse for lump coal on the sieve;
2. concentrate the storehouse underflow and drain into vibration sieve bend with pump and add the dehydration of high frequency sieve, high frequency sieve sieve is gone up coarse slime, and (0.2～1.0mm) enters coal bunker, and backwater is back to concentrated storehouse;
3. for satisfying high-pressure pump to requirements in water quality, concentrate the storehouse overflow and add flocculant, enter the tube settling storehouse after the mixing, fine particle coal slime in the coal water and other solid particulate matter are aggregated into big particle to improve sinking speed, guarantee in the tube settling storehouse overflow water quality solid suspension content less than 50mg/l, tube settling storehouse underflow fine coal slurry (＜0.2mm) supply with the filter press dehydration to reclaim with pump;
4. filter press filtrate is returned the tube settling storehouse again, and overflow clear water in tube settling storehouse is for back production high-pressure pump round-robin.
Above-mentioned process for fully dehydrating coal under hydraulic coal mining well, according to water quality and coal different in kind, described flocculant can be one or both in non-ionic polyacrylamide, PAMA, PAMC, polymeric aluminum, aluminum sulfate or the ferric sulfate.
The present invention compared with prior art, adopt three grades of dewatering process, thoroughly realized hydromining coal down-hole fully dehydrating, coal water elevator system and ground dewatering system have been cancelled, realization hydromining coal all drought fortune droughts is carried, the technology investment expense is low, power consumption is low, fittings cost is low than two kinds of background technology in the present invention, and especially the operational outfit general power only is 35% of a full waterpower lifting technology.
Following table be the present invention compared with prior art, production capacity is the gap of needed investment funds of 100t/h hydraulic coal mining production system and operating cost, therefrom the present invention has remarkable economic efficiency as can be seen.
Description of drawings
Accompanying drawing 1 is a process chart of the present invention.
The specific embodiment
Referring to accompanying drawing 1, the present invention is a kind of hydromining coal down-hole process for fully dehydrating, and the equipment of employing comprises that scraper plate drags for hole classification dewatering screen, concentrates storehouse, tube settling storehouse, vibration sieve bend, high frequency shale shaker and filter press.Technology of the present invention is divided into lump coal dehydration, coarse slime dehydration and fine coal slurry and purifies three grades of operations of thickening, and this technology is undertaken by following step:
At first, the coal slurry that the hydromining working face gets off is introduced into scraper plate and drags for hole classification dewatering screen, and (＞0.5～1.0mm) by entering coal bunker after the scratch board conveyor dehydration that has sieve plate, and sieve coal water down overflows to concentrated storehouse for lump coal on the sieve; Then, concentrate the storehouse underflow and drain into vibration sieve bend with pump and add the dehydration of high frequency sieve, high frequency sieve sieve is gone up coarse slime, and (0.2～1.0mm) enters coal bunker, and vibration sieve bend adds high frequency sieve backwater and is back to concentrated storehouse; Again, concentrate the storehouse overflow and add and enter the tube settling storehouse after flocculant mixes, in the tube settling storehouse overflow water quality solid suspension content less than 50mg/l, tube settling storehouse underflow fine coal slurry (＜0.2mm) supply with the filter press dehydration to reclaim with pump; At last, filter press filtrate is returned the tube settling storehouse again, and overflow clear water in tube settling storehouse is for back production high-pressure pump round-robin.
Below be the embodiment of several flocculant adding methods, all satisfy high-pressure pump to of the requirement of water quality solid suspension content less than 50mg/l:
Example 1: No. 3 coal seams of certain coal mining, ature of coal is a lean coal, and the water quality pH value is 7.8, adds a kind of flocculant poly aluminium earlier, and addition is 30g/m
3Another kind is the nonionic polyacrylamide flocculant, and molecular weight is 5,100,000, and addition is 3g/m
3
Example 2: certain colliery ature of coal is a coking coal, and the water quality pH value is 6.5, only needs to add the flocculant non-ionic polyacrylamide and can satisfy the water quality treatment requirement, and molecular weight is 8,000,000, and addition is 5g/m
3
Example 3: certain coal preparation plant's ature of coal is a coking coal, and hydromining coal water water quality pH value is 8.5, adds flocculant poly aluminium earlier, and addition is 45g/m
3Add non-ionic polyacrylamide again, molecular weight is 5,100,000, and addition is 4g/m
3
Example 4: coal preparation plant's flotation tailing adds two kinds of flocculants can satisfy the water quality treatment requirement, adds flocculant poly aluminium earlier, and addition is 45g/m
3Another kind is a PAMA, and molecular weight is 8,000,000, and adding dose is 5g/m
3
Claims (2)
1. hydromining coal down-hole process for fully dehydrating is characterized in that: it is divided into lump coal dehydration, coarse slime dehydration and fine coal slurry and purifies three grades of operations of thickening, and this technology is undertaken by following step:
(1). the coal slurry that the hydromining working face gets off is introduced into scraper plate and drags for hole classification dewatering screen, and (＞0.5～1.0mm) by entering coal bunker after the scratch board conveyor dehydration that has sieve plate, and the sieve low-grades overflow to concentrated storehouse for lump coal on the sieve;
(2). concentrate the storehouse underflow and drain into vibration sieve bend with pump and add the dehydration of high frequency sieve, high frequency sieve sieve is gone up coarse slime, and (0.2～1.0mm) enters coal bunker, and backwater is back to concentrated storehouse;
(3). concentrate the storehouse overflow and add and enter the tube settling storehouse after flocculant mixes, guarantee in the tube settling storehouse overflow water quality solid suspension content less than 50mg/l, tube settling storehouse underflow fine coal slurry (＜0.2mm) supply with the filter press dehydration to reclaim with pump;
(4). filter press filtrate is returned the tube settling storehouse again, and overflow clear water in tube settling storehouse is for back production high-pressure pump round-robin.
2. process for fully dehydrating coal under hydraulic coal mining well according to claim 1, it is characterized in that described flocculant is one or both in non-ionic polyacrylamide, PAMA, PAMC, polymeric aluminum, aluminum sulfate or the ferric sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910175210A CN101711929A (en) | 2009-11-25 | 2009-11-25 | Process for fully dehydrating coal under hydraulic coal mining well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910175210A CN101711929A (en) | 2009-11-25 | 2009-11-25 | Process for fully dehydrating coal under hydraulic coal mining well |
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| CN101711929A true CN101711929A (en) | 2010-05-26 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102228762A (en) * | 2011-05-16 | 2011-11-02 | 云南大红山管道有限公司 | Dehydration method and device of tailings |
| CN102358677A (en) * | 2011-09-16 | 2012-02-22 | 中国电力工程顾问集团西北电力设计院 | Coal slime treatment process |
| CN104069936A (en) * | 2014-06-30 | 2014-10-01 | 煤炭工业济南设计研究院有限公司 | Coal slime water treatment process of mine water coal |
| CN105396684A (en) * | 2015-12-21 | 2016-03-16 | 深圳市瑞成世代实业有限公司 | Method for extracting ultra-low-ash-content pure coal from coal slime |
| CN111909749A (en) * | 2020-07-22 | 2020-11-10 | 中煤能源研究院有限责任公司 | Underground crude coal dehydration treatment process |
| CN114455796A (en) * | 2021-12-30 | 2022-05-10 | 山东创新华一环境工程有限公司 | Coal slime dehydration process |
| CN115445320A (en) * | 2022-08-31 | 2022-12-09 | 晋能控股装备制造集团有限公司寺河煤矿 | Mine water underground treatment process |
-
2009
- 2009-11-25 CN CN200910175210A patent/CN101711929A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102228762A (en) * | 2011-05-16 | 2011-11-02 | 云南大红山管道有限公司 | Dehydration method and device of tailings |
| CN102228762B (en) * | 2011-05-16 | 2013-12-18 | 云南大红山管道有限公司 | Dehydration method and device of tailings |
| CN102358677A (en) * | 2011-09-16 | 2012-02-22 | 中国电力工程顾问集团西北电力设计院 | Coal slime treatment process |
| CN104069936A (en) * | 2014-06-30 | 2014-10-01 | 煤炭工业济南设计研究院有限公司 | Coal slime water treatment process of mine water coal |
| CN105396684A (en) * | 2015-12-21 | 2016-03-16 | 深圳市瑞成世代实业有限公司 | Method for extracting ultra-low-ash-content pure coal from coal slime |
| CN111909749A (en) * | 2020-07-22 | 2020-11-10 | 中煤能源研究院有限责任公司 | Underground crude coal dehydration treatment process |
| CN114455796A (en) * | 2021-12-30 | 2022-05-10 | 山东创新华一环境工程有限公司 | Coal slime dehydration process |
| CN115445320A (en) * | 2022-08-31 | 2022-12-09 | 晋能控股装备制造集团有限公司寺河煤矿 | Mine water underground treatment process |
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Open date: 20100526 |