CN104567335A - System and technological method for drying coal slime by high-temperature flue gas of power station - Google Patents
System and technological method for drying coal slime by high-temperature flue gas of power station Download PDFInfo
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- CN104567335A CN104567335A CN201510039222.9A CN201510039222A CN104567335A CN 104567335 A CN104567335 A CN 104567335A CN 201510039222 A CN201510039222 A CN 201510039222A CN 104567335 A CN104567335 A CN 104567335A
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- 239000003245 coal Substances 0.000 title claims abstract description 91
- 238000001035 drying Methods 0.000 title claims abstract description 73
- 239000003546 flue gas Substances 0.000 title claims abstract description 68
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000428 dust Substances 0.000 claims abstract description 31
- 239000002817 coal dust Substances 0.000 claims description 9
- 230000032258 transport Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 5
- 238000010410 dusting Methods 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 25
- 238000004065 wastewater treatment Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- -1 solid-state castoff Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a system and a technological method for drying coal slime by high-temperature flue gas of a power station and belongs to the technical field of energy conservation and environmental protection. The system for drying the coal slime by the high-temperature flue gas of the power station comprises feeding equipment (1), a dryer (2), a primary dust remover (3), finished product conveying equipment (4), a fan (5), a power plant dust remover (6), a power plant boiler (7) and a presedimentation chamber (8). The system and the technological method overcome the defects of system complexity, low efficiency, high coal consumption, diseconomy in operation and incapability of meeting environmental protection standards of existing coal slime drying methods.
Description
Technical field
The present invention relates to a kind of system and the process that utilize power plant's high temperature flue gas drying coal slime, belong to energy-conserving and environment-protective technical field.
Background technology
Coal slime is the semi-solid thing of the moisture formation of coal dust, it is a kind of byproduct in coal production process, generally still have the calorific value of 10 ~ 20MJ/kg, even exceeding some low heat value thermal coals, is a kind of coal resources of preciousness, but the unfavorable conditions such as coal slime has again that high retentiveness is strong, high-moisture and high viscosity, stack, store and transport all more difficult, be difficult to realize commercial Application, result not only wastes valuable coal resources, and causes serious environmental pollution.
Coal is that China uses maximum energy, expects 2015, and national coal slime output will reach 2.4 hundred million tons, along with the progress of technology, under the encouragement of national related industry policy, in recent years boiler of power plant mix burn coal slime generate electricity, become coal slime utilize Perfected process.
Boiler is entered by being mixed into power plant soot after coal slime drying, it is one of main technique methods of current Boiler Mixed Burning coal slime, conventional coal slime drying system as shown in Figure 1,600 DEG C ~ 800 DEG C high-temperature hot flue gases adopting hot-blast stove to produce directly heat coal slime, moisture evaporation in coal slime is discharged, thus realizes the drying process to coal slime.System chief component has: the elementary deduster 3 of the useless flue gas of process of being responsible for the drying machine 2 of dry coal slime, carrying the feeding device 1 of coal slime to drying machine 2, be responsible for and dust arrester 6a, process dust arrester 6a discharge mortar wastewater treatment equipment 11, finished product conveying equipment 4, blower fan 5, the hot-blast stove 7a of high-temperature hot flue gas is provided for drying machine 2, be the solid-state castoff treating apparatus 10, chimney 12 etc. that hot-blast stove 7a supplies coal-fired defeated device for coal 9, process hot-blast stove 7a discharges slag.
Limit by construction cost, system cannot arrange desulfurization and out of stock device, pollutant emission severe overweight; Process dust-laden gives up the dust arrester of flue gas, cannot meet dust emission standard; Solid waste treatment device and wastewater treatment can not meet environmental protection standard equally; The efficiency of combustion of hot-blast stove is low simultaneously.
Therefore, conventional coal slime drying system exist system complex, hot-blast stove efficiency low and coal consumption is high, runs extremely uneconomical, pollutant, dust, solid-state castoff, waste water etc. discharge cannot meet the shortcomings such as environmental protection standard.
Summary of the invention
In order to overcome existing coal slime drying means exist system complex, efficiency is low, coal consumption is high, run uneconomical, cannot the defects such as environmental protection standard be met, the present invention proposes a kind of system and the process that utilize power plant's high temperature flue gas drying coal slime.
The present invention adopts following technical scheme: a kind of system utilizing power plant's high temperature flue gas drying coal slime, it is characterized in that, comprise feeding device, drying machine, elementary deduster, finished product conveying equipment, blower fan, plant dust catcher, boiler of power plant, pre-expansion chamber, the delivery outlet of described feeding device is connected with the input port of described drying machine, one end of the delivery outlet of described drying machine is connected with the input port of described elementary deduster, the other end of the delivery outlet of described drying machine is connected with described finished product conveying equipment, one end of described elementary deduster delivery outlet is connected with described finished product conveying equipment, the other end of described elementary deduster delivery outlet is connected with described blower fan, described blower fan delivery outlet respectively with the input port of described plant dust catcher, described boiler of power plant is connected, one end of the delivery outlet of described boiler of power plant is connected with the input port of described plant dust catcher, the other end of the delivery outlet of described boiler of power plant is connected with the input port of described pre-expansion chamber, the delivery outlet of described pre-expansion chamber is connected with the input port of described drying machine.
Technical scheme of the present invention also provides a kind of process utilizing power plant's high temperature flue gas drying coal slime, it is characterized in that, comprises the steps:
(1) high-temperature flue gas of boiler of power plant, under the effect of blower fan, first passes through pre-expansion chamber, and separated by swarming ash in the middle part of high-temperature flue gas, the high-temperature flue gas after dedusting enters drying machine;
(2) wet coal slime is delivered into drying machine by feeding device, and wet coal slime directly contacts with the high-temperature flue gas from boiler of power plant in drying machine carries out mass heat transfer;
(3) after coal slime and flue gas complete mass heat transfer substantially, wet coal slime becomes the coal slime product after mummification, and the coal slime after mummification is discharged from the delivery outlet of drying machine and entered finished product conveying equipment, and mummification coal slime transports by finished product conveying equipment;
(4) after coal slime and flue gas complete mass heat transfer substantially, flue gas becomes useless flue gas and discharges in drying machine, useless flue gas is after elementary deduster rough dusting, plant dust catcher entrance is entered by blower fan, after the stove of remittance boiler of power plant after flue gas, enter plant dust catcher and follow-up power plant process flow process thereof;
(5) coal dust of elementary deduster collection, enter finished product conveying equipment, coal dust together transports with mummification coal slime by finished product conveying equipment.
The beneficial effect that the present invention reaches: the efficiency of combustion of (1) boiler of power plant is far above hot-blast stove; (2) directly extract the high-temperature flue gas of 500 ~ 700 DEG C from boiler of power plant as coal slime drying source, coal consumption is low, economize energy; (3) system does not have waste residue, waste water and toxic emission, and environmental protection is good; (4) system architecture hinge structure greatly simplifies, small investment.
Accompanying drawing explanation
Fig. 1 is coal slime drying system schematic diagram of the prior art.
The implication marked in Fig. 1: 1-feeding device, 2-drying machine, the elementary deduster of 3-, 4-finished product conveying equipment, 5-blower fan, 6a-dust arrester, 7a-hot-blast stove, the defeated device for coal of 9-, 10-solid-state castoff treating apparatus, 12-chimney.
Fig. 2 is coal slime drying system structural representation of the present invention.
The implication marked in Fig. 2: 1-feeding device, 2-drying machine, the elementary deduster of 3-, 4-finished product conveying equipment, 5-blower fan, 6-plant dust catcher, 7-boiler of power plant, the pre-expansion chamber of 8-.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
As shown in Figure 1 be coal slime drying system schematic diagram of the prior art, 600 DEG C ~ 800 DEG C high-temperature hot flue gases adopting hot-blast stove to produce directly heat coal slime, the moisture evaporation in coal slime are discharged, thus realize drying process to coal slime.System chief component has: the elementary deduster 3 of the useless flue gas of process of being responsible for the drying machine 2 of dry coal slime, carrying the feeding device 1 of coal slime to drying machine 2, be responsible for and dust arrester 6a, process dust arrester 6a discharge mortar wastewater treatment equipment 11, finished product conveying equipment 4, blower fan 5, the hot-blast stove 7a of high-temperature hot flue gas is provided for drying machine 2, be solid-state castoff treating apparatus 10, the chimney 12 that hot-blast stove 7a supplies coal-fired defeated device for coal 9, process hot-blast stove 7a discharges slag.
Compared to Figure 1, the present invention directly extracts the high-temperature flue gas of 500 ~ 700 DEG C as coal slime drying source from boiler of power plant, be supplied to drying machine 2, cancels in Fig. 1: hot-blast stove 7a, defeated device for coal 9, solid-state castoff treating apparatus 10; Dried useless flue gas is entered plant dust catcher together to process with the useless flue gas of power plant, cancel in Fig. 1: dust arrester 6a, wastewater treatment equipment 11, chimney 12.
As shown in Figure 2 be coal slime drying system structural representation of the present invention, the present invention proposes a kind of system utilizing power plant's high temperature flue gas drying coal slime, comprise feeding device 1, drying machine 2, elementary deduster 3, finished product conveying equipment 4, blower fan 5, plant dust catcher 6, boiler of power plant 7, pre-expansion chamber 8, the delivery outlet of described feeding device 1 is connected with the input port of described drying machine 2, one end of the delivery outlet of described drying machine 2 is connected with the input port of described elementary deduster 3, the other end of the delivery outlet of described drying machine 2 is connected with described finished product conveying equipment 4, one end of described elementary deduster 3 delivery outlet is connected with described finished product conveying equipment 4, the other end of described elementary deduster 3 delivery outlet is connected with described blower fan 5, described blower fan 5 delivery outlet respectively with the input port of described plant dust catcher 6, described boiler of power plant 7 is connected, one end of the delivery outlet of described boiler of power plant 7 is connected with the input port of described plant dust catcher 6, the other end of the delivery outlet of described boiler of power plant 7 is connected with the input port of described pre-expansion chamber 8, the delivery outlet of described pre-expansion chamber 8 is connected with the input port of described drying machine 2.
Technical scheme of the present invention also provides a kind of process utilizing power plant's high temperature flue gas drying coal slime, it is characterized in that, comprises the steps:
(1) high-temperature flue gas of boiler of power plant 7, under the effect of blower fan 5, first pass through pre-expansion chamber 8, separated by swarming ash in the middle part of high-temperature flue gas, the high-temperature flue gas after dedusting enters drying machine 2;
(2) wet coal slime is delivered into drying machine 2 by feeding device 1, and wet coal slime directly contacts with the high-temperature flue gas from boiler of power plant 7 in drying machine 2 carries out mass heat transfer;
(3) after coal slime and flue gas complete mass heat transfer substantially, wet coal slime becomes the coal slime product after mummification, and the coal slime after mummification is discharged from the delivery outlet of drying machine 2 and entered finished product conveying equipment 4, and mummification coal slime transports by finished product conveying equipment 4;
(4) after coal slime and flue gas complete mass heat transfer substantially, flue gas becomes useless flue gas and discharges in drying machine 2, useless flue gas is after elementary deduster 3 rough dusting, plant dust catcher 6 entrance is entered by blower fan 5, after the stove of remittance boiler of power plant 7 after flue gas, enter plant dust catcher 6 and follow-up power plant process flow process thereof;
(5) coal dust of elementary deduster 3 collection, enter finished product conveying equipment 4, coal dust together transports with mummification coal slime by finished product conveying equipment 4.
Operation principle of the present invention: wet coal slime is delivered into drying machine 2 by feeding device 1, wet coal slime directly contacts with the high-temperature flue gas from boiler of power plant 7 in drying machine 2, under the effect of high-temperature flue gas, the stickiness of water reduces, penetrating power strengthens, the outside diffusion velocity of moisture of coal slime inside increases, wet coal slime and high-temperature flue gas constantly carry out mass heat transfer, moisture is constantly evaporated, along with the development of dry process, the water content of coal slime reduces gradually, after coal slime and flue gas complete mass heat transfer substantially, wet coal slime becomes product after mummification, coal slime after mummification is discharged from the afterbody of drying machine 2 and is entered finished product conveying equipment 4, mummification coal slime transports by finished product conveying equipment 4, the high-temperature flue gas of boiler of power plant 7, under the effect of blower fan 5, first pass through pre-expansion chamber 8, swarming ash in the middle part of high-temperature flue gas is separated, high-temperature flue gas after dedusting enters drying machine 2, high-temperature flue gas constantly carries out mass heat transfer with wet coal slime in drying machine 2, along with the development of dry process, flue-gas temperature reduces gradually, after coal slime and flue gas complete mass heat transfer substantially, flue gas becomes useless flue gas and discharges in drying machine 2, useless flue gas is after elementary deduster 3 rough dusting, plant dust catcher 6 entrance is entered by blower fan 5, after the stove of remittance boiler of power plant 7 after flue gas, enter plant dust catcher 6 and follow-up power plant process flow process thereof, the coal dust that elementary deduster 3 is collected, enter finished product conveying equipment 4, coal dust together transports with mummification coal slime by finished product conveying equipment 4, the flying dust that pre-expansion chamber 8 is collected, the related system being incorporated to power plant together processes.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (2)
1. one kind utilizes the system of power plant's high temperature flue gas drying coal slime, it is characterized in that, comprise feeding device (1), drying machine (2), elementary deduster (3), finished product conveying equipment (4), blower fan (5), plant dust catcher (6), boiler of power plant (7), pre-expansion chamber (8), the delivery outlet of described feeding device (1) is connected with the input port of described drying machine (2), one end of the delivery outlet of described drying machine (2) is connected with the input port of described elementary deduster (3), the other end of the delivery outlet of described drying machine (2) is connected with described finished product conveying equipment (4), one end of described elementary deduster (3) delivery outlet is connected with described finished product conveying equipment (4), the other end of described elementary deduster (3) delivery outlet is connected with described blower fan (5), described blower fan (5) delivery outlet respectively with the input port of described plant dust catcher (6), described boiler of power plant (7) is connected, one end of the delivery outlet of described boiler of power plant (7) is connected with the input port of described plant dust catcher (6), the other end of the delivery outlet of described boiler of power plant (7) is connected with the input port of described pre-expansion chamber (8), the delivery outlet of described pre-expansion chamber (8) is connected with the input port of described drying machine (2).
2. adopt a kind of process utilizing power plant's high temperature flue gas drying coal slime utilizing the system of power plant's high temperature flue gas drying coal slime according to claim 1, it is characterized in that, comprise the steps:
(1) high-temperature flue gas of boiler of power plant (7), under the effect of blower fan (5), first pass through pre-expansion chamber (8), separated by swarming ash in the middle part of high-temperature flue gas, the high-temperature flue gas after dedusting enters drying machine (2);
(2) wet coal slime is delivered into drying machine (2) by feeding device (1), and wet coal slime directly contacts with the high-temperature flue gas from boiler of power plant (7) in drying machine (2) carries out mass heat transfer;
(3) after coal slime and flue gas complete mass heat transfer substantially, wet coal slime becomes the coal slime product after mummification, and the coal slime after mummification is discharged from the delivery outlet of drying machine (2) and entered finished product conveying equipment (4), and mummification coal slime transports by finished product conveying equipment (4);
(4) after coal slime and flue gas complete mass heat transfer substantially, flue gas becomes useless flue gas and discharges in drying machine (2), useless flue gas is after elementary deduster (3) rough dusting, plant dust catcher (6) entrance is entered by blower fan (5), after the stove of remittance boiler of power plant (7) after flue gas, enter plant dust catcher (6) and follow-up power plant process flow process thereof;
(5) coal dust collected of elementary deduster (3), enter finished product conveying equipment (4), coal dust together transports with mummification coal slime by finished product conveying equipment (4).
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| CN201510039222.9A CN104567335A (en) | 2015-01-27 | 2015-01-27 | System and technological method for drying coal slime by high-temperature flue gas of power station |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170257A (en) * | 2015-08-14 | 2015-12-23 | 中国能源建设集团安徽省电力设计院有限公司 | Coal slime drying and screening crushing device utilizing smoke waste heat of power station boiler |
| CN114076323A (en) * | 2020-08-20 | 2022-02-22 | 光大清洁技术股份有限公司 | Process and system for treating coal slime by using waste heat of boiler |
| CN115535546A (en) * | 2022-05-31 | 2022-12-30 | 青岛松灵电力环保设备有限公司 | Drying and conveying system for refining coal from gasification furnace slag and conveying method thereof |
| CN117146290A (en) * | 2023-08-25 | 2023-12-01 | 华能伊敏煤电有限责任公司 | A flue gas treatment method and a device for drying coal slurry with power plant boiler flue gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114076323A (en) * | 2020-08-20 | 2022-02-22 | 光大清洁技术股份有限公司 | Process and system for treating coal slime by using waste heat of boiler |
| CN115535546A (en) * | 2022-05-31 | 2022-12-30 | 青岛松灵电力环保设备有限公司 | Drying and conveying system for refining coal from gasification furnace slag and conveying method thereof |
| CN117146290A (en) * | 2023-08-25 | 2023-12-01 | 华能伊敏煤电有限责任公司 | A flue gas treatment method and a device for drying coal slurry with power plant boiler flue gas |
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Application publication date: 20150429 |