CN103303681B - A kind of fine coal pressure-flow system and technique - Google Patents
A kind of fine coal pressure-flow system and technique Download PDFInfo
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- CN103303681B CN103303681B CN201310226053.0A CN201310226053A CN103303681B CN 103303681 B CN103303681 B CN 103303681B CN 201310226053 A CN201310226053 A CN 201310226053A CN 103303681 B CN103303681 B CN 103303681B
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- 239000003245 coal Substances 0.000 title claims abstract description 195
- 238000000034 method Methods 0.000 title claims description 20
- 238000003860 storage Methods 0.000 claims abstract description 27
- 238000009423 ventilation Methods 0.000 claims abstract description 19
- 239000004744 fabric Substances 0.000 claims abstract description 17
- 239000007792 gaseous phase Substances 0.000 claims abstract description 3
- 238000007664 blowing Methods 0.000 claims description 23
- 238000005516 engineering process Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 239000002912 waste gas Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000003546 flue gas Substances 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 238000005243 fluidization Methods 0.000 abstract description 5
- 239000011800 void material Substances 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 238000002309 gasification Methods 0.000 description 13
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 8
- 238000010926 purge Methods 0.000 description 7
- 238000005273 aeration Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000012071 phase Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 101000749837 Bos taurus Leukocyte cell-derived chemotaxin 1 Proteins 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 230000001055 chewing effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000002716 delivery method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
Abstract
The invention provides a kind of fine coal pressure-flow system, comprise cloth envelop collector, fine coal transfer pot, fine coal low-pressure tank, fine coal lock hopper, fine coal pressure storage tank and Rotary feeder, cloth envelop collector is connected successively with fine coal transfer pot, fine coal low-pressure tank, fine coal lock hopper, fine coal pressure storage tank and Rotary feeder, and the gaseous phase outlet of fine coal low-pressure tank, fine coal lock hopper, fine coal pressure storage tank is connected with cloth envelop collector respectively by pipeline; Fine coal transfer pot, fine coal low-pressure tank, fine coal lock hopper, fine coal pressure storage tank and Rotary feeder inside are provided with ventilation big gun, and ventilation big gun is void channels structure.This system employing major part is the ventilation big gun of void channels, completes the fluidisation of fine coal, pressurization and discharging; Adopt the Rotary feeder with blanking guiding device, realize stable conveying and the flow regulating of fine coal.
Description
Technical field
The present invention relates to technical field of chemistry and chemical engineering, be specifically related to a kind of fine coal pressure-flow system and technique.
Background technology
Along with the scarcity day by day of petroleum and natural gas resource, the utilization that cleans of coal is more and more subject to people's attention.Develop the key that large-scale Coal Gasification Technology is clean utilization coal resources.In the middle of large-scale Coal Gasification Technology, air flow bed technology gets most of the attention.Air-flow bed coal-gasification technology mainly contains the air-flow bed coal-gasification technology such as Shell bed pulverized coal gasification technology (SCGP), G.E. coal water slurry gasification technology and GSP, HT-L, CROLIN, two-stage furnace, E-GAS.Air-flow bed coal-gasification technology can be divided into coal water slurry and fine coal charging two type by its feeding manner.Facts have proved: the stability of air flow bed charging directly affects gasification efficiency and security of system.The stability of fine coal charging is particularly important, can directly affect the control of oxygen coal ratio and the safe operation of powder coal gasification furnace.In addition, fine coal pressurization and mode of movement also directly affect equipment investment, construction and operating cost.
The fine coal positive delivery method having realized commercialized running has the fine coal positive delivery technique of the process matchings such as SCGP, HT-L.Such technique typical process is as follows: first the fine coal from coal-grinding and drying section send into low-pressure tank, through lock hopper pressurization, sends into pressure storage tank.In fine coal pressure storage tank, after certain unreactable gas is mixed with fine coal by ventilation cone, through fine coal feeder and fine coal control cock, enter seam, formation concentration is 150 ~ 550kg/m
3coal stream.Such technique relative maturity, but fine coal two-phase transportation is often unstable, and coal burner easily jumps car; Technological process is complicated, adopts the frame arrangement equipment up to 100 meters, equipment and valve more; Have employed complicated sequence control, regulating loop and technique interlocking, instrument control investment is also higher; In addition, the aeration equipment adopting sintering metal to prepare is easy to damage, and expensive.
The technique that current domestic other technology disclosed also has patent CN1376761A to set forth.This patent principal feature is that fine coal pressures partially adopts sintering metal vent board as fluidizing equipment, and fine coal transport portion utilizes rotatory feeder valve to control fine coal discharge quantity, then carries fine coal to gasification furnace by carrier gas.This patent adopts rotatory feeder valve to control blanking, and carrier gas, can not fluidisation fine coal well without aeration equipment, and fine coal two-phase transportation is difficult to stable, and fine coal flow can not accurately control; This technology does not have fine coal driving circulation loop, realizes coal and burns that to chew normal ignition comparatively difficult; In addition, sintering metal vent board is expensive, also not easily changes after breakage.
Summary of the invention
The object of the invention is to solve problems of the prior art, a kind of novel fine coal pressure-flow system and technique are provided.This system employing major part is the ventilation big gun of void channels, completes the fluidisation of fine coal, pressurization and discharging; Adopt the Rotary feeder with blanking guiding device, realize stable conveying and the flow regulating of fine coal; High-efficiency tissue positive delivery flow process, reduces equipment, construction and over-the-road expense.
The object of the invention is to be achieved through the following technical solutions:
A kind of fine coal pressure-flow system, comprise cloth envelop collector 1, fine coal transfer pot 2, fine coal low-pressure tank 3, fine coal lock hopper 4, fine coal pressure storage tank 5 and Rotary feeder 6, wherein said cloth envelop collector 1 is connected successively with fine coal transfer pot 2, fine coal low-pressure tank 3, fine coal lock hopper 4, fine coal pressure storage tank 5 and Rotary feeder 6, and the gaseous phase outlet of described fine coal low-pressure tank 3, fine coal lock hopper 4, fine coal pressure storage tank 5 is connected with cloth envelop collector 1 respectively by pipeline.
Described fine coal transfer pot 2, fine coal low-pressure tank 3, fine coal lock hopper 4, fine coal pressure storage tank 5 Rotary feeder 6 outside are provided with inert gas import adapter, and inside is equipped with ventilation big gun, and described ventilation big gun is porous convoluted tube structure.
Described Rotary feeder 6 comprises blanking guiding device, and described blanking guiding device adopts the ventilation big gun structure of porous winding pipeline.
Adopt the technological process of above-mentioned fine coal pressure-flow system to be realized by sequence control, comprise the sequence control of fine coal blowing and the control of fine coal sequence of batching products.
The sequence control of fine coal blowing comprises initialization, low pressure blowing, lock hopper pressurization, high pressure blowing, lock hopper pressure release and waste gas filtering.
1, initialization: each equipment comes into operation fluidized gas; Fine coal low-pressure tank 3 material level is normal; Fine coal lock hopper 4 is in isolated condition; Fine coal pressure storage tank 5 reaches operation pressure, and outlet is cut off, and Rotary feeder 6 is in stop position.
2, low pressure blowing: when fine coal lock hopper 4 and fine coal low-pressure tank 3 pressure reduction are less than permissible value, fine coal lock hopper 4 is communicated with blowing with fine coal low-pressure tank 3;
3, lock hopper pressurization: when fine coal lock hopper 4 shows high charge level, fine coal lock hopper 4 isolates rear pressurising;
4, high pressure blowing: after fine coal lock hopper 4 and the pressure reduction of fine coal pressure storage tank 5 reach permissible value, fine coal lock hopper 4 stops pressurising, is communicated with fine coal pressure storage tank 5, carries out blowing.
5, lock hopper pressure release: when fine coal lock hopper 4 shows low material level, fine coal lock hopper 4 isolates pressure release; After pressure release completes, sequence does not receive halt instruction, will go round and begin again to carry out blowing by said process; Receive halt instruction, sequence stops, and is in init state.
6, waste gas filtering: enter cloth envelop collector 1 from the emptying unreactable gas of fine coal low-pressure tank 3, fine coal lock hopper 4 and fine coal pressure storage tank 5, enter air after filtration, the fine coal collected is by fine coal transfer pot 2, and Geldart-D particle is to fine coal low-pressure tank 3.
Fine coal sequence of batching products controls be divided into initialization, blowing pipeline, coal circulation, burner igniting and stop charging five parts.
1, initialization: come into operation aeration equipment, operation pressure set up by fine coal pressure storage tank 5, and Rotary feeder 6 exports and gasification furnace entrance cuts off.
2, blowing pipeline: purge the driving circulation loop that Rotary feeder 6 is exported to fine coal low-pressure tank 3.
3, set up coal circulation: start Rotary feeder 6, be exported to the driving circulation loop of fine coal low-pressure tank 3 by Rotary feeder 6, set up stable fine coal circulation.
4, burner igniting: coal burns to be chewed after firing command sends, and stop stokehold purging, fine coal is switched to coal burner direction, and fine coal enters coal burner.
5, charging is stopped: receiving coal and burn when chewing cutoff command, fine coal switches to low-pressure tank direction, and stokehold fine coal pipeline purges; Rotary feeder 6 is out of service, and outlet is cut off and purged.
The unreactable gas that technological process adopts is CO
2, N
2, one or more in flue gas.
Apply beneficial effect of the present invention:
(1) aeration equipment that the ventilation big gun adopting void channels to make replaces porous sintered metal to make, facilitate the manufacture of pressure resistant vessel, the equipment of reducing establishes money.
(2) big gun is ventilated relative to ventilation cone (plate), not fragile, be also convenient to maintenance and change, reducing operation expense.
(3) adopt the fine coal that pneumatic conveying mode conveying cloth envelop collector accumulates, cloth envelop collector and fine coal storage tank need not arranged in series, avoid building too high framework.
(4) by the Rotary feeder with blanking guiding device, carry out fluidisation and conveying to fine coal, regulate fine coal flow, avoid using expensive, damageable fine coal control cock, and degree of regulation is higher, fine coal two-phase transportation is comparatively stable.
(5) high-efficiency tissue positive delivery flow process, can reduce equipment and instrument control investment, save and build and over-the-road expense.
Accompanying drawing explanation
Fig. 1 is the flow scheme of fine coal pressure-flow system of the present invention
1-cloth envelop collector 2-fine coal transfer pot 3-fine coal low-pressure tank
4-fine coal lock hopper 5-fine coal pressure storage tank 6-Rotary feeder
Detailed description of the invention
For better the present invention being described, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
As shown in Figure 1, fine coal positive delivery process system comprises cloth envelop collector 1, fine coal transfer pot 2, fine coal low-pressure tank 3, fine coal lock hopper 4, fine coal pressure storage tank 5 and Rotary feeder 6.
Wherein, cloth envelop collector 1 selects ash bucket with the commercially available prod of aeration equipment according to design condition.
Fine coal transfer pot 2 is used for carrying cloth envelop collector 1 to filter the fine coal of gained, is made up of the tank body of an inside with top discharge pipeline; The bottom of top discharge pipeline is made up of big gun of ventilating, and tank body lateral surface has unreactable gas 2 ~ 4 entrance sleeves.
Fine coal low-pressure tank 3 is used for storing fine coal, and connect lower cone by the cylindrical shell of a upper end band end socket and form, lower cone is inverted cone; Lower cone medial surface is provided with ventilation big gun, and lateral surface has low-pressure inert gas 4 ~ 8 entrance sleeves.
Fine coal lock hopper 4 is used for the fine coal that pressurizes, and connect lower cone by the cylindrical shell of a upper end band end socket and form, lower cone is inverted cone; Lower cone medial surface is provided with ventilation big gun, and lateral surface is provided with high-pressure inert gas 2 ~ 4 entrance sleeves.
Fine coal pressure storage tank 5 is used for storing fine coal, and connect lower cone by the cylindrical shell of a upper end band end socket and form, lower cone is inverted round stage; Be provided with ventilation big gun inside inverted round stage, lateral surface has high-pressure inert gas 2 ~ 4 entrance sleeves.
Rotary feeder 6 is used for water conservancy diversion and fluidisation fine coal, and regulate fine coal flow, gabarit is hollow cylindrical form or reversed round bench shaped, and there is the blanking guiding device of particular design inside; Inwall is provided with ventilation big gun, and lateral surface is provided with unreactable gas 1 ~ 2 entrance sleeve.Blanking guiding device with aeration equipment, by stand to or traverse gear driven rotary.
The major part of fine coal transfer pot 2, fine coal low-pressure tank 3, fine coal lock hopper 4, fine coal pressure storage tank 5 and Rotary feeder 6 internal ventilation big gun is porous disc coil road, and the major part of blanking guiding device ventilation big gun is porous winding pipeline.
Fine coal positive delivery process controls to automatically perform by the sequence control of fine coal blowing and sequence of batching products.
With fine coal operational throughput for 200 ~ 500kg/h, be forced into 1.0MPa, and the stable process being transported to powder coal gasification furnace is example (see figure 1).
(1) from the fine coal of coal-grinding and dehumidification system, (temperature is 80 DEG C, liquid water content≤2%; Particle diameter: 5um≤5%, 95um≤5%; Operational throughput: 200 ~ 500kg/h), send into fine coal low-pressure tank (3) by sealed type belt conveyor.
(2), after fine coal blowing sequence control initialization, start the sequence control of fine coal blowing, fine coal low-pressure tank 3 is communicated with blowing with fine coal lock hopper 4; Lock hopper 4 blowing terminates, and isolation is pressurized to 1.0MPa; After fine coal lock hopper 4 and the pressure reduction of fine coal pressure storage tank 5 reach permissible value, fine coal lock hopper 4 is communicated with blowing with pressure storage tank 5; After fine coal lock hopper 4 high pressure blowing terminates, isolation pressure release.Enter cloth envelop collector 1 from the emptying unreactable gas of fine coal low-pressure tank 3, fine coal lock hopper 4 and fine coal pressure storage tank 5, emptying after filtering, the fine coal collected sends into fine coal low-pressure tank 3 by fine coal transfer pot 2.
(3), after sequence of batching products controls initialization, start sequence of batching products and control, first fine coal delivery duct purges.After purging terminates, adjust logical Rotary feeder 6 to export circulation loop, start Rotary feeder 6, set up stable fine coal circulation.After the stable conveying of fine coal, fine coal switches to gasification furnace direction, and fine coal enters coal burner, lights a fire; Circulation seam purges.Receive coal to burn when chewing cutoff command, fine coal is switched to circulation loop, and stokehold fine coal pipeline purges; Rotary feeder 6 is out of service, and outlet is cut off and purged.
(4) unreactable gas adopted is N
2, pressure 1.6MPa, temperature 100 DEG C, oxygen content≤0.5%.
The above; be only the present invention's preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (6)
1. a fine coal pressure-flow system, it is characterized in that, comprise cloth envelop collector (1), fine coal transfer pot (2), fine coal low-pressure tank (3), fine coal lock hopper (4), fine coal pressure storage tank (5) and Rotary feeder (6), wherein said cloth envelop collector (1) and fine coal transfer pot (2), fine coal low-pressure tank (3), fine coal lock hopper (4), fine coal pressure storage tank (5) and Rotary feeder (6) connect successively, described fine coal low-pressure tank (3), fine coal lock hopper (4), the gaseous phase outlet of fine coal pressure storage tank (5) is connected with cloth envelop collector (1) respectively by pipeline, described fine coal transfer pot (2), fine coal low-pressure tank (3), fine coal lock hopper (4), fine coal pressure storage tank (5) and Rotary feeder (6) outside are provided with inert gas import adapter, inside is equipped with ventilation big gun, described ventilation big gun is porous convoluted tube structure.
2. fine coal pressure-flow system according to claim 1, is characterized in that, described Rotary feeder (6) comprises blanking guiding device, and described blanking guiding device adopts the ventilation big gun structure of porous winding pipeline.
3. fine coal pressure-flow system according to claim 1, is characterized in that, fine coal blowing and delivery technology process are all realized by sequence control.
4. fine coal pressure-flow system according to claim 3, is characterized in that, the sequence control of described fine coal blowing comprises initialization, low pressure blowing, lock hopper pressurization, high pressure blowing, lock hopper pressure release and waste gas filtering.
5. fine coal pressure-flow system according to claim 3, is characterized in that, described fine coal sequence of batching products controls comprise initialization, blowing pipeline, coal circulation, burner igniting and stop charging.
6. fine coal pressure-flow system according to claim 3, is characterized in that, the unreactable gas of employing is CO
2, N
2, one or more in flue gas.
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| CN104194839B (en) * | 2014-09-01 | 2016-08-24 | 中科合成油工程股份有限公司 | Fine coal pressurized delivered is to the method for pressurized-gasification furnace |
| CN105398824B (en) * | 2015-11-24 | 2017-10-13 | 山东润银生物化工股份有限公司 | Fine coal replaces transformation automatic conveying device and carrying method |
| CN106395385A (en) * | 2016-11-11 | 2017-02-15 | 航天长征化学工程股份有限公司 | Diaphragm type pulverized coal pressurized conveying system and conveying method |
| CN107539788B (en) * | 2017-08-21 | 2023-10-10 | 新奥科技发展有限公司 | Material conveying system and method |
| CN107954218A (en) * | 2017-12-13 | 2018-04-24 | 航天长征化学工程股份有限公司 | Coal grinding and pulverized coal conveying system |
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| CA1208258A (en) * | 1982-06-23 | 1986-07-22 | Bernardus H. Mink | Process for conveying a particulate solid fuel |
| JP4006798B2 (en) * | 1997-11-21 | 2007-11-14 | バブコック日立株式会社 | Coal feeder for gas-bed gasifier |
| CN1164716C (en) * | 2002-03-29 | 2004-09-01 | 华东理工大学 | Method and equipment for charging dried coal powder in its pressurized gasification |
| CN203332973U (en) * | 2013-06-07 | 2013-12-11 | 北京神雾环境能源科技集团股份有限公司 | Pulverized coal pressurization conveying system |
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Denomination of invention: Pulverized coal pressure transmission system and process Effective date of registration: 20180307 Granted publication date: 20151223 Pledgee: Bank of Nanjing, Limited by Share Ltd, Beijing branch Pledgor: Shenwu science and technology group Limited by Share Ltd Registration number: 2018990000177 |
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