CN103303681A - Pulverized coal pressure transmission system and process - Google Patents
Pulverized coal pressure transmission system and process Download PDFInfo
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- CN103303681A CN103303681A CN2013102260530A CN201310226053A CN103303681A CN 103303681 A CN103303681 A CN 103303681A CN 2013102260530 A CN2013102260530 A CN 2013102260530A CN 201310226053 A CN201310226053 A CN 201310226053A CN 103303681 A CN103303681 A CN 103303681A
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- lock hopper
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- 239000003245 coal Substances 0.000 title claims abstract description 196
- 238000000034 method Methods 0.000 title claims description 24
- 230000005540 biological transmission Effects 0.000 title abstract 6
- 238000003860 storage Methods 0.000 claims abstract description 31
- 238000009423 ventilation Methods 0.000 claims abstract description 20
- 239000004744 fabric Substances 0.000 claims abstract description 17
- 238000007664 blowing Methods 0.000 claims description 23
- 238000005516 engineering process Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 10
- 238000007600 charging Methods 0.000 claims description 6
- 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
- 239000007792 gaseous phase Substances 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 238000005243 fluidization Methods 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract description 3
- 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
- 238000002955 isolation Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 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
- 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
- 239000000843 powder Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000011800 void material 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
- 238000002156 mixing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Abstract
The invention provides a pulverized coal pressure transmission system which comprises a cloth bag filter, a pulverized coal transmission tank, a low-pressure pulverized coal storage tank, a pulverized coal lock hopper, a high-pressure pulverized coal storage tank and a rotary feeder, wherein the cloth bag filter is connected with the pulverized coal transmission tank, the low-pressure pulverized coal storage tank, the pulverized coal lock hopper, the high-pressure pulverized coal storage tank and the rotary feeder in sequence; gas-phase outlets of the low-pressure pulverized coal storage tank, the pulverized coal lock hopper, and the high-pressure pulverized coal storage tank are respectively connected with the cloth bag filter through pipelines; and ventilation guns are respectively arranged in the pulverized coal transmission tank, the low-pressure pulverized coal storage tank, the pulverized coal lock hopper, the high-pressure pulverized coal storage tank and the rotary feeder, and adopt porous pipeline structures. The system adopts the ventilation guns with the porous pipelines as main parts to complete pulverized coal fluidization, pressurization and discharging, and adopts the rotary feeder with a discharging flow-guiding device to achieve the stable transmission and flow adjustment of pulverized 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 day by day scarcity of petroleum and natural gas resource, the utilization that cleans of coal more and more is subject to people's attention.Develop the key that large-scale Coal Gasification Technology is the clean utilization coal resources.In the middle of large-scale Coal Gasification Technology, the air flow bed technology gets most of the attention.The 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 sections stoves, E-GAS.The air-flow bed coal-gasification technology can be divided into two types of coal water slurry and fine coal chargings 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 that has 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: the fine coal from coal-grinding and drying section is at first sent into low-pressure tank, through the lock hopper pressurization, sends into pressure storage tank.In the fine coal pressure storage tank, certain unreactable gas through fine coal feeder and fine coal control cock, enters seam after mixing with fine coal by the ventilation cone, and formation concentration is 150～550kg/m
3Coal stream.Such technique is relatively ripe, but the close mutually conveying of fine coal is often unstable, and the coal burner is easily jumped car; Technological process is complicated, adopts the frame arrangement equipment up to 100 meters, and equipment and valve are more; Adopted complicated sequence control, regulating loop and technique interlocking, instrument control investment is also higher; In addition, adopt the aeration equipment of sintering metal preparation to be easy to damage, and expensive.
Domestic disclosed other technology also has the technique that patent CN1376761A sets forth at present.This patent principal feature is that the fine coal pressures partially adopts the sintering metal vent board as fluidizing equipment, and the fine coal transport portion utilizes rotatory feeder valve control fine coal discharge quantity, then carries fine coal to gasification furnace by carrier gas.This patent adopts rotatory feeder valve control blanking, and aeration equipment is not passed through in carrier gas, fluidisation fine coal well, and fine coal is close to be carried mutually and is difficult to stablely, and the fine coal flow can not accurately be controlled; This technology does not have fine coal driving circulation loop, realizes that the coal burning is chewed normal ignition comparatively difficult; In addition, the sintering metal vent board is expensive, also is difficult for after the breakage changing.
Summary of the invention
The objective of the invention is to solve problems of the prior art, a kind of novel fine coal pressure-flow system and technique are provided.It is the ventilation big gun of void channels that this system adopts major part, finishes fluidisation, pressurization and the discharging of fine coal; Employing realizes stable conveying and the flow regulating of fine coal with the Rotary feeder of blanking guiding device; High-efficiency tissue positive delivery flow process, reduction equipment, construction and over-the-road expense.
The objective 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 by pipeline respectively.
Described fine coal transfer pot 2, fine coal low-pressure tank 3, fine coal lock hopper 4, fine coal pressure storage tank 5 Rotary feeders 6 outsides are provided with inert gas import and take over, and inside is equipped with the ventilation big gun, and described ventilation big gun is porous disc coil road structure.
Described Rotary feeder 6 comprises the 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 realize by sequence control, comprise the control of the sequence control of fine coal blowing and 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 fluidized gas that comes into operation; Fine coal low-pressure tank 3 material levels are 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: during less than permissible value, fine coal lock hopper 4 is communicated with blowing with fine coal low-pressure tank 3 with fine coal low-pressure tank 3 pressure reduction for fine coal lock hopper 4;
3, lock hopper pressurization: when fine coal lock hopper 4 demonstration high charge levels, pressurising after 4 isolation of fine coal lock hopper;
4, high pressure blowing: after the pressure reduction of fine coal lock hopper 4 and fine coal pressure storage tank 5 reached permissible value, fine coal lock hopper 4 stopped pressurising, is communicated with fine coal pressure storage tank 5, carries out blowing.
5, lock hopper pressure release: hang down material level when fine coal lock hopper 4 shows, the 4 isolation pressure releases of fine coal lock hopper; After pressure release was finished, sequence was not received halt instruction, will go round and begin again and 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 atmosphere after the filtration, the fine coal of collecting is by fine coal transfer pot 2, and pneumatic transporting is delivered to fine coal low-pressure tank 3.
The control of fine coal sequence of batching products is divided into initialization, blowing pipeline, coal circulation, burner igniting and stops five parts of charging.
1, initialization: the aeration equipment that comes into operation, fine coal pressure storage tank 5 is set up operation pressure, and Rotary feeder 6 outlets and gasification furnace entrance cut 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 the 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 stops the stokehold and purges, and fine coal is cut to coal burner direction, and fine coal enters the coal burner.
5, stop charging: receive coal and burn when chewing cutoff command, fine coal switches to the 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, in the flue gas one or more.
Use beneficial effect of the present invention:
(1) aeration equipment that the ventilation big gun that adopts void channels to make replaces porous sintered metal to make has made things convenient for the manufacturing of pressure resistant vessel, has reduced equipment and has established money.
(2) the ventilation big gun is bored (plate) with respect to ventilation, and is not fragile, also is convenient to maintenance and replacing, reduced operation expense.
(3) fine coal that adopts pneumatic conveying mode to carry cloth envelop collector to accumulate, cloth envelop collector and fine coal storage tank needn't be connected and be laid, and avoid building too high framework.
(4) by the Rotary feeder with the blanking guiding device, fine coal is carried out fluidisation and conveying, regulate the fine coal flow, avoid using expensive, damageable fine coal control cock, and degree of regulation is higher, the close mutually conveying of fine coal is comparatively stable.
(5) high-efficiency tissue positive delivery flow process, energy reduction equipment and instrument control investment are saved and are built and over-the-road expense.
Description of drawings
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
The specific embodiment
For the present invention is described better, below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the 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 of the tank body of an inside with the top discharge pipeline; The bottom of top discharge pipeline is made of the ventilation big gun, and the tank body lateral surface has 2～4 entrance sleeves of unreactable gas.
Fine coal low-pressure tank 3 is used for storing fine coal, is made of the lower cone of cylindrical shell connection of a upper end with end socket, and lower cone is inverted cone; Lower cone medial surface is provided with the ventilation big gun, and lateral surface has 4～8 entrance sleeves of low-pressure inert gas.
Fine coal lock hopper 4 is used for the fine coal that pressurizes, and connects lower cone by a upper end with the cylindrical shell of end socket and consists of, and lower cone is inverted cone; Lower cone medial surface is provided with the ventilation big gun, and lateral surface is provided with 2～4 entrance sleeves of high-pressure inert gas.
Fine coal pressure storage tank 5 is used for storing fine coal, is made of the lower cone of cylindrical shell connection of a upper end with end socket, and lower cone is inverted round stage; The inverted round stage inboard is provided with the ventilation big gun, and lateral surface has 2～4 entrance sleeves of high-pressure inert gas.
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 guns is porous disc coil road, and the major part of blanking guiding device ventilation big gun is the porous winding pipeline.
Fine coal positive delivery process automatically performs by the sequence control of fine coal blowing and sequence of batching products control.
Take the fine coal operational throughput as 200～500kg/h, be forced into 1.0MPa, and the stable process that is transported to powder coal gasification furnace is the example (see figure 1).
(1) (temperature is 80 ℃, liquid water content≤2% from the fine coal of coal-grinding and dehumidification system; Particle diameter: 5um≤5%, 95um≤5%; Operational throughput: 200～500kg/h), send into fine coal low-pressure tank (3) by the sealed type belt conveyor.
(2) after the 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 blowings finish, and isolation is pressurized to 1.0MPa; After the pressure reduction of fine coal lock hopper 4 and fine coal pressure storage tank 5 reached permissible value, fine coal lock hopper 4 was communicated with blowing with pressure storage tank 5; After fine coal lock hopper 4 high pressure blowings finish, the 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 of collecting is sent into fine coal low-pressure tank 3 by fine coal transfer pot 2.
(3) after the sequence of batching products control initialization, start sequence of batching products control, the fine coal delivery duct at first purges.After purging end, transfer logical Rotary feeder 6 outlet circulation loops, start Rotary feeder 6, set up stable fine coal and circulate.After the stable conveying of fine coal, fine coal switches to the gasification furnace direction, and fine coal enters the coal burner, lights a fire; The circulation seam purges.Receive coal and burn when chewing cutoff command, fine coal is cut 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 that adopts is N
2, pressure 1.6MPa, 100 ℃ of temperature, oxygen content≤0.5%.
The above; only for the better specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation 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 (7)
1. 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) by pipeline respectively.
2. a kind of fine coal pressure-flow system according to claim 1, it is characterized in that, 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 and take over, inside is equipped with the ventilation big gun, and described ventilation big gun is porous disc coil road structure.
3. a kind of fine coal pressure-flow system according to claim 1 is characterized in that, described Rotary feeder (6) comprises the blanking guiding device, and described blanking guiding device adopts the ventilation big gun structure of porous winding pipeline.
4. a kind of fine coal pressure-flow system according to claim 1 is characterized in that, fine coal blowing and delivery technology process all realize by sequence control.
5. a kind of fine coal positive delivery technique according to claim 4 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.
6. a kind of fine coal positive delivery technique according to claim 4 is characterized in that, described fine coal sequence of batching products control comprises initialization, blowing pipeline, coal circulation, burner igniting and stops charging.
7. a kind of fine coal positive delivery technique according to claim 4 is characterized in that, the unreactable gas of employing is CO
2, N
2, in the flue gas one or more.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310226053.0A CN103303681B (en) | 2013-06-07 | 2013-06-07 | A kind of fine coal pressure-flow system and technique |
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| CN201310226053.0A CN103303681B (en) | 2013-06-07 | 2013-06-07 | A kind of fine coal pressure-flow system and technique |
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| CN103303681A true CN103303681A (en) | 2013-09-18 |
| CN103303681B CN103303681B (en) | 2015-12-23 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104194839A (en) * | 2014-09-01 | 2014-12-10 | 中科合成油工程有限公司 | Method for delivering powdered coal to pressurized gasification furnace in pressurized manner |
| CN105398824A (en) * | 2015-11-24 | 2016-03-16 | 山东润银生物化工股份有限公司 | Pulverized coal alternative transformation automatic conveying device and 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 |
| CN107539788A (en) * | 2017-08-21 | 2018-01-05 | 新奥科技发展有限公司 | A kind of material-transporting 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 |
| CN109161407A (en) * | 2018-10-16 | 2019-01-08 | 合肥德博生物能源科技有限公司 | A kind of devices and methods therefor of biomass high-adaptability, efficient positive pressure gasification coupling coal-burning boiler |
| CN109161407B (en) * | 2018-10-16 | 2024-04-30 | 合肥德博生物能源科技有限公司 | Device and method for biomass high-adaptability and high-efficiency positive pressure gasification coupling coal-fired boiler |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104194839A (en) * | 2014-09-01 | 2014-12-10 | 中科合成油工程有限公司 | Method for delivering powdered coal to pressurized gasification furnace in pressurized manner |
| CN105398824A (en) * | 2015-11-24 | 2016-03-16 | 山东润银生物化工股份有限公司 | Pulverized coal alternative transformation automatic conveying device and 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 |
| CN107539788A (en) * | 2017-08-21 | 2018-01-05 | 新奥科技发展有限公司 | A kind of material-transporting system and 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 |
| CN109161407A (en) * | 2018-10-16 | 2019-01-08 | 合肥德博生物能源科技有限公司 | A kind of devices and methods therefor of biomass high-adaptability, efficient positive pressure gasification coupling coal-burning boiler |
| CN109161407B (en) * | 2018-10-16 | 2024-04-30 | 合肥德博生物能源科技有限公司 | Device and method for biomass high-adaptability and high-efficiency positive pressure gasification coupling coal-fired boiler |
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|---|---|
| CN103303681B (en) | 2015-12-23 |
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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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