CN103206718A - System and method for improving slurry property of low order coal slurry - Google Patents
System and method for improving slurry property of low order coal slurry Download PDFInfo
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- CN103206718A CN103206718A CN2013101219172A CN201310121917A CN103206718A CN 103206718 A CN103206718 A CN 103206718A CN 2013101219172 A CN2013101219172 A CN 2013101219172A CN 201310121917 A CN201310121917 A CN 201310121917A CN 103206718 A CN103206718 A CN 103206718A
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Abstract
The invention discloses a system and a method for improving slurry property of low order coal slurry. The system includes a powder making system and a fine powder separating system. The powder making system comprises two vertical mill mechanisms. The vertical mill mechanisms are connected with bucket elevators which are respectively connected with a coarse powder finished product cabin and a fine powder finished product cabin. The fine powder separating system comprises a buffering cabin connected with the fine powder finished product cabin. The buffering cabin is communicated with a first grader and a second grader in sequence. The first grader and the second grader are respectively communicated with a coarse powder collecting cabin and a super fine powder collecting cabin. The coarse powder finished product cabin is communicated with a slurry mixing system through a dense phase conveying device; and the fine buffering cabin is communicated with the slurry mixing system through a conveying belt. The method includes three parts of coarse powder preparation, fine powder separation and extraction, and high-density coal slurry preparation. By collocating proportion of coarse coal powder and fine coal powder, deposition efficiency of coal powder is improved, distribution of coal powder after being mixed is close to an Alfred model; and slurry property of low order coal slurry is improved through graduation.
Description
Technical field
The invention belongs to the COAL-WATER SLURRY TECHNOLOGY field, relate to a kind of system and method that improves low-order coal water-coal-slurry paste-forming properties.
Background technology
Coal is the main energy sources of China, can not change in following considerable time.Country implements clean coal plan, clean coal technology as improving coal utilization efficient, reduce the important means of environmental pollution, just be subjected to various circles of society and more and more paying close attention to, development comprises that the clean coal technology of COAL-WATER SLURRY TECHNOLOGY is the urgent task of pendulum in face of compatriots.Control coal is utilizing the energy-saving and emission-reduction of process, is that inevitable requirement and the reality of implementing the sustainable development energy strategy is selected.
Shenfu coal is low ash, special low-sulfur, low-phosphorous, the high-quality thermal coal of middle golf calorific value.Shenfu coalfield is one of especially big coalfield of China, therefore promotes shenfu coal rationally to utilize, and the structure of utilizing of improving shenfu coal is that the reality that realizes the sustainable development energy strategy is selected.Water-coal-slurry has the same flow behavior of oil, and have the combustion characteristics more more superior than raw coal, but the shenfu coal degree of metamorphism is low as a kind of novel coal-based liquid cleaning fuel, belongs to difficult pulping coal, and slurrying concentration generally can only reach 60%.There is following shortcoming in the low concentration of water coal slurry:
(1) use as boiler combustion, caloric value is low, has reduced the efficiency of combustion of boiler.
(2) for the present situation of North Shaanxi lack of water, preparation low concentration of water coal slurry meaning needs more water resource.
(3) the low concentration of water coal slurry has increased cost of transportation.
(4) use water-coal-slurry, low concentration of water coal slurry (being lower than 60%) to cause coal water slurry gasification coal consumption and oxygen consumption height as gasification, directly have influence on cold gas efficiency.
(5) high-concentration coal-water slurry stability obviously is better than the low concentration of water coal slurry.
Therefore improve low-order coal water-coal-slurry paste-forming properties, improve the low-order coal water coal slurry concentration and promoting just to seem particularly important aspect shenfu coal clean utilization, the development Coal Gasification Technology.
The factor that influences the coal paste-forming properties is a lot, and wherein " grating " technology is to improve the coal dust deposition efficiency, the key technology of preparation high-concentration coal-water slurry.The Mathematical Modeling of relevant grating comprises: Rosin-Rammler, Gaudin-Schuhmann, and Alfred model.The Alfred model has universality preferably, and has compatibility preferably with the size distribution detector, can be used for instructing the paste-forming properties of the water-coal-slurry that improves low-order coal.The advantage of dry method powder process is that the size distribution of coal dust is had stronger controllability: by adjusting the size distribution of apparatus and process parameter control coal dust, utilizing the Alfred model to instruct thickness coal dust blend proportion, is the basic ideas that we improve the low-order coal water coal slurry concentration.
Summary of the invention
The purpose of this invention is to provide a kind of system and method that improves low-order coal water-coal-slurry paste-forming properties, this system has solved problems of the prior art, makes coal dust possess higher deposition efficiency by adopting two vertical mill systems, has increased the output of coal dust; Reduce coal dust moisture by oven dry, increased the paste-forming properties of coal dust.This device systems environmental protection, noise be low, improved the production operation environment, ensured safety in production, and the control that has reached accurate quantification is sized mixing.Its equipment is applicable to the water-coal-slurry of the various height of preparation, middle concentration.This method can improve at least 3% with the low-order coal water coal slurry concentration, and this process has realized suitability for industrialized production.
The technical solution adopted in the present invention is:
A kind of system that improves low-order coal water-coal-slurry paste-forming properties, comprise pulverized coal preparation system and fine powder piece-rate system, described pulverized coal preparation system comprises the two cover vertical grinder structures that are made of storehouse ribbon conveyer coal conveyer belt, surge bunker, weighing coal feeder and the vertical grinder of the conveying raw coal that links to each other successively and vertical grinder connection Vertical Mill drier; Described vertical grinder is connected to 1# pulse bag dust arrester installation, 1# pulse bag dust arrester installation connects bucket elevator by batcher, bucket elevator is connected to meal finished bin and fine powder finished bin respectively, is respectively arranged with 2# pulse bag dust arrester installation on meal finished bin and the fine powder finished bin;
Described fine powder piece-rate system comprises the surge bunker that links to each other with the fine powder finished bin, and surge bunker is communicated with one-level grader and secondary grader successively, and one-level grader and secondary grader are communicated with fines collection storehouse and superfine powder collecting bin respectively; The secondary grader is communicated with 4# pulse bag dust arrester installation;
Described meal finished bin is communicated to blended size system by the concentrated phase conveyer; Described fines collection storehouse is communicated to blended size system by conveyer belt.
Further, in the described pulverized coal preparation system, the Vertical Mill drier comprises hot-blast stove, and hot-blast stove is communicated with stokehold water-coal-slurry jar by the 1# screw pump provides the energy for hot-blast stove, and hot-blast stove is communicated with vertical grinder by dust arrester.
Further, in the described pulverized coal preparation system, 1# pulse bag dust arrester installation and 2# pulse bag dust arrester installation are connected with compressed air system by ventilation blower; In the described fine powder piece-rate system, 4# pulse bag dust arrester installation is communicated with marsupial gather dust collecting bin and air-introduced machine respectively.
Further, in the described pulverized coal preparation system, be provided with CO in 1# pulse bag dust arrester installation and 2# pulse bag dust arrester installation and vertical grinder, meal finished bin and the fine powder finished bin
2Fire extinguishing system.
Further, in the described pulverized coal preparation system, batcher comprises minor spiral batcher and king bolt batcher, and the minor spiral batcher is positioned at 1# pulse bag dust arrester installation below, the king bolt batcher is positioned at minor spiral batcher below, and the king bolt batcher links to each other with the minor spiral batcher.
Further, in the described fine powder piece-rate system, surge bunker is provided with 3# pulse bag dust arrester installation.
Correspondingly, the present invention gives a kind of method that improves low-order coal water-coal-slurry paste-forming properties, comprises the steps:
A. the preparation of meal:
1) the foam coal with material size＜50mm quantitatively adds vertical grinder by weighing coal feeder, enter in the mill from vertical grinder after hot blast that hot-blast stove comes out is by the dust arrester dedusting simultaneously, it is the meal of 80 μ m that feed coal grinds out fine powder and the meso-position radius that meso-position radius is 20 μ m respectively at two cover vertical grinders;
2) by adjusting negative pressure and separator rotating speed in the Vertical Mill, be that the meal of 80 μ m is fallen mill grinding again from the awl bucket with not satisfying meso-position radius; Meso-position radius is that the meal of 80 μ m trips out mill with air-flow one, collects through pulse bag collection device, delivers to the meal finished bin by batcher through bucket elevator, and is standby;
3) grinding out meso-position radius through vertical grinder is that the fine powder of 20 μ m is collected through pulse bag collection device, delivers in the fine powder finished bin through bucket elevator by batcher;
B. the separation of superfine powder and extraction:
1) fine powder in the fine powder finished bin is delivered in the surge bunker of fine powder piece-rate system by the helical feed mode;
2) the one-level grader in the fine powder piece-rate system is that the fine powder of 20 μ m further carries out superfine powder and separates with meso-position radius, wherein the one-level grader separates the meal of carrying secretly in the fine powder, be collected in the meal collecting bin, and turn back to system's meal finished bin from the meal collecting bin;
3) to carry meso-position radius secretly be that the ultra-fine grain coal dust of 4-6 μ m enters the secondary grader and carries out the secondary classification to fine powder, and wherein the superfine powder separated of secondary grader is collected in the superfine powder collecting bin respectively and is collected in bag through the bag collection device and gathers dust and use for the grating of sizing mixing in the collecting bin;
C. the preparation of high-concentration coal-water slurry:
The superfine powder that meal in the meal finished bin and superfine powder collecting bin and bag are gathered dust in the collecting bin is that the ratio of 2:1 is mixed according to mass ratio, be added to the jar of sizing mixing after mixing by agitator, add water the coal slurry mass percent simultaneously in the jar of sizing mixing respectively and be 0.6% dispersant and 0.1% stabilizing agent; Stir slaking after 3 hours, filter through the pressure filtration sieve, shear finally by crossing shear pump, deliver to the finished product jar; Finished product is delivered to hot-blast stove stokehold jar or boiler stokehold jar.
Further, in the described method, dispersant is the slurries additive agent NDF of Nanjing University.
Further, in the described method, stabilizing agent is Nanjing University's sodium cellulose glycolate stabilizing agent.
The invention has the beneficial effects as follows:
(1) adopt two vertical mill systems to the foam coal grinding, negative pressure realizes the control coal powder size in rotating speed by adjusting the Vertical Mill separator and the Vertical Mill, simultaneously two vertical mill systems can realize that thickness roughly grinds respectively and fine grinding, store separately, thereby realize that controllable granularity is strong, production environment good (noise is low relatively, subnormal ambient reduced floating dust).
(2) adopt the gas classification machine that the coal dust of fine powder from the vertical mill system output extracted, scrap build is little, drops into low.
(3) by the collocation of thickness coal dust ratio, improved the deposition efficiency of coal dust, make the distribution that mixes the back coal dust more near the Alfred model, improved the paste-forming properties of low-order coal by " grating ".
(4) coal dust can packedly transport through the dry method grating, realizes stokehold slurrying, has saved cost of transportation.
(5) the water coal slurry stability height after the grating has solved transportation, has deposited the sedimentation problem in the process.
Description of drawings
Fig. 1 is present device system flow block diagram.
Fig. 2 is grating particle-size distribution of coal-water slurry figure not.
Fig. 3 is through grating water-coal-slurry grading curve distribution map.
Among the figure: 1. coal conveyer belt; 2. raw material surge bunker; 3. weighing coal feeder; 4. vertical grinder; 5.1# pulse bag dust arrester installation; 6. minor spiral batcher; 7. king bolt batcher; 8. bucket elevator; 9. meal finished bin; 10. stokehold water-coal-slurry jar; 11.1# screw pump; 12. hot-blast stove; 13. dust arrester; 14. ventilation blower; 15.2# pulse bag dust arrester installation; 16. concentrated phase conveyer; 17. compressed air system; 18.CO
2Fire extinguishing system; 19. fine powder finished bin; 20. surge bunker; 21. one-level grader; 22. secondary grader; 23.4# pulse bag dust arrester installation; 24. air-introduced machine; 25.3# pulse bag dust arrester installation; 26. meal collecting bin; 27. superfine powder collecting bin; The collecting bin 28. bag gathers dust.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, present device comprises pulverized coal preparation system and fine powder piece-rate system, in the pulverized coal preparation system, comprise the coal conveyer belt 1 of carrying raw coal by the storehouse ribbon conveyer, coal conveyer belt 1 is connected to surge bunker 2, and surge bunker 2 connects vertical grinder 4 by weighing coal feeder 3, and vertical grinder 4 is communicated with the Vertical Mill drier, constitute two cover vertical grinder structures by the said equipment, two cover vertical grinder structures can be respectively carry out meal to raw coal and grind with fine powder and grind.Vertical grinder 4 is connected to 1# pulse bag dust arrester installation 5,1# pulse bag dust arrester installation 5 connects king bolt batcher 7 by minor spiral batcher 6 and is connected to bucket elevator 8, bucket elevator 8 is connected to meal finished bin 9 and fine powder finished bin 19 respectively, and meal finished bin 9 and fine powder finished bin 19 are provided with 2# pulse bag dust arrester installation 15; Wherein, the Vertical Mill drier comprises hot-blast stove 12, and hot-blast stove 12 is communicated with stokehold water-coal-slurry jar 10 by 1# screw pump 11 provides the energy for hot-blast stove 12, and hot-blast stove 12 is communicated with vertical grinder 4 by dust arrester 13.1# pulse bag dust arrester installation 5 and 2# pulse bag dust arrester installation 15 are connected with compressed air system 17 by ventilation blower 14.Be provided with CO in 1# pulse bag dust arrester installation 5 and 2# pulse bag dust arrester installation 15 and vertical grinder 4, meal finished bin 9 and the fine powder finished bin 19
2Fire extinguishing system 18.
The fine powder piece-rate system comprises the surge bunker 20 that links to each other with fine powder finished bin 19, and surge bunker 20 is communicated with one-level grader 21 and secondary grader 22 successively, and one-level grader 21 and secondary grader 22 are communicated with meal collecting bin 26 and superfine powder collecting bin 27 respectively; Secondary grader 22 is communicated with 4# pulse bag dust arrester installation 23, and 4# pulse bag dust arrester installation 23 is communicated with marsupial gather dust collecting bin 28 and air-introduced machine 24 respectively; Surge bunker 20 is provided with 3# pulse bag dust arrester installation 25; Meal finished bin 9 is communicated to blended size system by concentrated phase conveyer 16; Superfine powder collecting bin 27 is communicated to blended size system by conveyer belt.
Below by specific embodiment the method that the present invention utilizes the said equipment to carry out pulping is further specified.
A. the preparation of meal:
1) will open tame loess hills colliery 5
-2(material size＜50mm) the foam coal quantitatively adds vertical grinder 4 by weighing coal feeder 3, feeding control is at 30T/h, after hot blast that hot-blast stove 12 comes out is by dust arrester 13 dedustings, enter in the mill from vertical grinder 4 simultaneously, by adjusting the coal dust that separator rotating speed and ventilation blower air quantity (adjustment negative pressure) preparation desired particle size distributes, Vertical Mill inside is controlled at 71 ℃ the Vertical Mill outlet temperature to dry moisture, enhancing coal dust grindability by hot-blast stove; Feed coal grinds out the fine powder that meso-position radius is 20 μ m (200 order sieving rates〉the following fine powder content 40% of 93%, 15 μ m) respectively at two cover vertical grinders 4, with meso-position radius be the meal (200 order sieving rate 35%) of 80 μ m;
2) by adjusting negative pressure and separator rotating speed in the Vertical Mill, be that the meal of 80 μ m is fallen mill grinding again from the awl bucket with not satisfying meso-position radius; Meso-position radius is that the meal of 80 μ m trips out mill with air-flow one, collects through pulse bag collection device, delivers to meal finished bin 9 by batcher through bucket elevator 8, and is standby;
3) grinding out meso-position radius through vertical grinder 4 is that the fine powder of 20 μ m is collected through pulse bag collection device, delivers in the fine powder finished bin 19 through bucket elevator 8 by batcher;
B. the separation of fine powder and extraction:
1) fine powder in the fine powder finished bin 19 is delivered in the surge bunker 20 of fine powder piece-rate system by the helical feed mode;
2) the one-level grader 21 in the fine powder piece-rate system is that the fine powder of 20 μ m further carries out superfine powder and separates with meso-position radius, wherein one-level grader 21 separates the meal of carrying secretly in the fine powder, be collected in meal collecting bin 26, and turn back to system's meal finished bin 9 from meal collecting bin 26;
3) to carry meso-position radius secretly be that the ultra-fine grain coal dust of 4-6 μ m enters secondary grader 22 and carries out the secondary classification to fine powder, and wherein the superfine powder separated of secondary grader 22 is collected in superfine powder collecting bin 27 respectively and is collected in bag through bag collection device 23 and gathers dust and use for the grating of sizing mixing in the collecting bin 28;
C. the preparation of high-concentration coal-water slurry:
The superfine powder that meal in the meal finished bin 9 and superfine powder collecting bin 27 and bag are gathered dust in the collecting bin 28 is that the ratio of 2:1 is mixed according to mass ratio, be added to the jar of sizing mixing after mixing by agitator, add water the coal slurry mass percent simultaneously in the jar of sizing mixing respectively and be 0.6% the slurries additive agent NDF of dispersant Nanjing University and Nanjing University's sodium cellulose glycolate stabilizing agent of 0.1%; Stir slaking after 3 hours, filter through the pressure filtration sieve, shear finally by crossing shear pump, deliver to the finished product jar; Finished product is delivered to hot-blast stove stokehold jar or boiler stokehold jar.
The size distribution of water-coal-slurry after the concentrate:
Adopt BT-2001 type laser particle size distribution instrument to the water-coal-slurry testing graininess of above-mentioned thickness ratio 2:1 modulation, simultaneously the water-coal-slurry of grating is not tested.Test result is seen Fig. 2, shown in Figure 3.
Fig. 2 is not for passing through the particle-size distribution of coal-water slurry (abscissa is particle size among the figure, and left side ordinate is cumulative amount, and the right ordinate is interval content) of grating, and Fig. 3 is the particle-size distribution of coal-water slurry of above-mentioned thickness ratio 2:1 modulation, presents " bimodal " and distributes.Bimodal distribution can improve the filling rate of coal powder size, improves the coal dust deposition efficiency.By the contrast of table 1 and Alfred model, can further see through the water-coal-slurry granularity cumulative amount after the grating more near the Alfred model, and grating sample and model gap are not bigger, especially 30 μ m and the following fine powder content of 10 μ m.
The cumulative distribution contrast of table 1. sample under some particle diameters
Soft precipitation did not appear in the maximum slurrying concentration of grating coal dust at 60%, 3 day, and hard precipitation appears in a week.The maximum slurrying concentration of coal dust is 63% after the grating, and viscosity is lower than 1200mPaS, stability＞30 days.
In sum, the present invention has improved the paste-forming properties of low order shenfu coal by pulverized coal particle " grating ", slurrying concentration has been improved at least 3 percentage points, and stability improves greatly.The raising of concentration can improve efficiency of combustion, saving cost of transportation, the raising gasification gas efficient of boiler.This preparation method can realize suitability for industrialized production, can satisfy the market application requirements.
Above content is to further describing that the present invention does in conjunction with concrete preferred embodiment; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by claims of submitting to.
Claims (9)
1. system that improves low-order coal water-coal-slurry paste-forming properties, it is characterized in that, comprise pulverized coal preparation system and fine powder piece-rate system, described pulverized coal preparation system comprises the two cover vertical grinder structures that are communicated with Vertical Mill drier formation by storehouse ribbon conveyer coal conveyer belt (1), surge bunker (2), weighing coal feeder (3) and the vertical grinder (4) of the conveying raw coal that links to each other successively and vertical grinder (4); Described vertical grinder (4) is connected to 1# pulse bag dust arrester installation (5), 1# pulse bag dust arrester installation (5) connects bucket elevator (8) by batcher, bucket elevator (8) is connected to meal finished bin (9) and fine powder finished bin (19) respectively, be respectively arranged with on meal finished bin (9) and the fine powder finished bin (19) the 2# pulse bag gather dust (15) device;
Described fine powder piece-rate system comprises the surge bunker (20) that links to each other with fine powder finished bin (19), surge bunker (20) is communicated with one-level grader (21) and secondary grader (22) successively, and one-level grader (21) and secondary grader (22) are communicated with meal collecting bin (26) and superfine powder collecting bin (27) respectively; Secondary grader (22) is communicated with 4# pulse bag dust arrester installation (23);
Described meal finished bin (9) is communicated to blended size system by concentrated phase conveyer (16); Described superfine powder collecting bin (27) is communicated to blended size system by conveyer belt.
2. a kind of system that improves low-order coal water-coal-slurry paste-forming properties according to claim 1, it is characterized in that, in the described pulverized coal preparation system, the Vertical Mill drier comprises hot-blast stove (12), hot-blast stove (12) is communicated with stokehold water-coal-slurry jar (10) by 1# screw pump (11) provides the energy for hot-blast stove (12), and hot-blast stove (12) is communicated with vertical grinder (4) by dust arrester (13).
3. a kind of system that improves low-order coal water-coal-slurry paste-forming properties according to claim 1, it is characterized in that, in the described pulverized coal preparation system, 1# pulse bag dust arrester installation (5) and 2# pulse bag dust arrester installation (15) are connected with compressed air system (17) by ventilation blower; In the described fine powder piece-rate system, 4# pulse bag dust arrester installation (23) is communicated with marsupial gather dust collecting bin (28) and air-introduced machine (24) respectively.
4. a kind of system that improves low-order coal water-coal-slurry paste-forming properties according to claim 1, it is characterized in that, in the described pulverized coal preparation system, be provided with CO2 fire extinguishing system (18) in 1# pulse bag dust arrester installation (5) and 2# pulse bag dust arrester installation (15) and vertical grinder (4), meal finished bin (9) and the fine powder finished bin (19).
5. a kind of system that improves low-order coal water-coal-slurry paste-forming properties according to claim 1, it is characterized in that, in the described pulverized coal preparation system, batcher comprises minor spiral batcher (6) and king bolt batcher (7), minor spiral batcher (6) is positioned at 1# pulse bag dust arrester installation (5) below, king bolt batcher (7) is positioned at minor spiral batcher (6) below, and king bolt batcher (7) links to each other with minor spiral batcher (6).
6. a kind of system that improves low-order coal water-coal-slurry paste-forming properties according to claim 1 is characterized in that, in the described fine powder piece-rate system, surge bunker (20) is provided with 3# pulse bag dust arrester installation (25).
7. a method that improves low-order coal water-coal-slurry paste-forming properties is characterized in that, this method comprises the steps:
A. the preparation of meal:
1) the foam coal with material size＜50mm quantitatively adds vertical grinder (4) by weighing coal feeder (3), enter in the mill from vertical grinder (4) after hot blast that hot-blast stove (12) comes out is by dust arrester (13) dedusting simultaneously, feed coal overlaps vertical grinders (4) two, and to grind out fine powder and the meso-position radius that meso-position radius is 20 μ m respectively be the meal of 80 μ m;
2) by adjusting negative pressure and separator rotating speed in the Vertical Mill, be that the meal of 80 μ m is fallen mill grinding again from the awl bucket with not satisfying meso-position radius; Meso-position radius is that the meal of 80 μ m trips out mill with air-flow one, collects through pulse bag collection device, delivers to meal finished bin (9) by batcher through bucket elevator (8), and is standby;
3) grinding out meso-position radius through vertical grinder (4) is that the fine powder of 20 μ m is collected through pulse bag collection device, delivers in the fine powder finished bin (19) through bucket elevator (8) by batcher;
B. the separation of fine powder and extraction:
1) fine powder in the fine powder finished bin (19) is delivered in the surge bunker (20) of fine powder piece-rate system by the helical feed mode;
2) the one-level grader (21) in the fine powder piece-rate system is that the fine powder of 20 μ m further carries out superfine powder and separates with meso-position radius, wherein one-level grader (21) separates the meal of carrying secretly in the fine powder, be collected in meal collecting bin (26), and turn back to system's meal finished bin (9) from meal collecting bin (26);
3) to carry meso-position radius secretly be that the ultra-fine grain coal dust of 4-6 μ m enters secondary grader (22) and carries out the secondary classification to fine powder, and wherein the superfine powder separated of secondary grader (22) is collected in superfine powder collecting bin (27) respectively and is collected in bag through bag collection device (23) and gathers dust and use for the grating of sizing mixing in the collecting bin (28);
C. the preparation of high-concentration coal-water slurry:
The superfine powder that meal in the meal finished bin (9) and superfine powder collecting bin (27) and bag are gathered dust in the collecting bin (28) is that the ratio of 2:1 is mixed according to mass ratio, be added to the jar of sizing mixing after mixing by agitator, add quality of pc percentage simultaneously in the jar of sizing mixing respectively and be 0.6% dispersant and 0.1% stabilizing agent; Stir slaking after 3 hours, filter through the pressure filtration sieve, shear finally by crossing shear pump, deliver to the finished product jar; Finished product is delivered to hot-blast stove stokehold jar or boiler stokehold jar.
8. the method for raising low-order coal water-coal-slurry paste-forming properties according to claim 7 is characterized in that, described dispersant is the slurries additive agent NDF of Nanjing University.
9. the method for raising low-order coal water-coal-slurry paste-forming properties according to claim 7 is characterized in that, described stabilizing agent is Nanjing University's sodium cellulose glycolate stabilizing agent.
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| CN103537355A (en) * | 2013-10-11 | 2014-01-29 | 陕煤集团神木张家峁矿业有限公司 | System and method for preparing ultrafine pulverized coal |
| CN107057789A (en) * | 2017-06-14 | 2017-08-18 | 南京大学 | A kind of optimization level matches somebody with somebody the preparation method of low energy consumption high-concentration coal-water slurry |
| CN108393187A (en) * | 2018-02-06 | 2018-08-14 | 湖南三创富泰环保材料股份有限公司 | A kind of grain slag vertical mill system temperature automatic control method |
| CN110643402A (en) * | 2019-10-08 | 2020-01-03 | 煤科院节能技术有限公司 | Method for preparing sludge coal water slurry through sludge viscosity reduction treatment |
| WO2024036669A1 (en) * | 2022-08-18 | 2024-02-22 | 安徽理工大学 | Water coal slurry concentration device |
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| WO2024036669A1 (en) * | 2022-08-18 | 2024-02-22 | 安徽理工大学 | Water coal slurry concentration device |
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