CN207698789U - A kind of coal-grinding and fine coal transport system - Google Patents
A kind of coal-grinding and fine coal transport system Download PDFInfo
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- CN207698789U CN207698789U CN201721730304.9U CN201721730304U CN207698789U CN 207698789 U CN207698789 U CN 207698789U CN 201721730304 U CN201721730304 U CN 201721730304U CN 207698789 U CN207698789 U CN 207698789U
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- 239000003245 coal Substances 0.000 title claims abstract description 419
- 238000000227 grinding Methods 0.000 title claims abstract description 67
- 238000001035 drying Methods 0.000 claims abstract description 99
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 98
- 239000000843 powder Substances 0.000 claims abstract description 50
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 49
- 238000003860 storage Methods 0.000 claims abstract description 30
- 239000011261 inert gas Substances 0.000 claims description 24
- 239000007789 gas Substances 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 8
- 239000002737 fuel gas Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000035611 feeding Effects 0.000 claims 20
- 230000003139 buffering effect Effects 0.000 claims 1
- 239000000835 fiber Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 238000002309 gasification Methods 0.000 abstract description 21
- 241000273930 Brevoortia tyrannus Species 0.000 description 48
- 239000002817 coal dust Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
A kind of coal-grinding of the utility model offer and fine coal transport system, belong to powdered coal pressuring gasified technical field, for solving the problems, such as that mill coal drying unit must be corresponded with fine coal pressurized delivered unit and gasification unit in existing powdered coal pressuring gasified system, the coal-grinding and fine coal transport system include mill coal drying unit and fine coal supply unit；The fine coal supply unit includes fine coal surge bunker, gate valve, the first rotary discharge valve, Pneumatic conveying pump, nitrogen system and several powder feeding pipelines；The discharge port of the mill coal drying unit is sequentially connected the fine coal surge bunker, gate valve, the first rotary discharge valve, Pneumatic conveying pump, and the discharge port of the Pneumatic conveying pump is connected to the fine coal storage tank in downstream by powder feeding pipeline；The nitrogen system connects the Pneumatic conveying pump, for providing low-pressure nitrogen for the Pneumatic conveying pump；Wherein, the mill coal drying unit, fine coal supply unit are arranged in the frame of coal-grinding island.The utility model can reduce investment, and stability and reliability are high.
Description
Technical field
The utility model is related to powdered coal pressuring gasified technical field more particularly to a kind of energy-efficient coal-grinding and fine coal delivery systems
System.
Background technology
Powdered coal pressuring gasified technology be it is a kind of it is clean, all kinds of solid coals are efficiently converted to gaseous hydrogen and an oxygen
Change the advanced technology of carbon mixed gas, basic principle is that coal is milled into dry coal dust, is continuously introduced into inert gas
Gasification furnace with water-cooling wall reacts under high-temperature and high-pressure conditions, generates the technique mistake of the raw gas of the gas containing co hydrogenation
Journey.
Mill coal drying unit is the consumption most unit of electric energy, traditional mill coal drying unit in powdered coal pressuring gasified system
It is one-to-one relationship with fine coal pressurized delivered unit and gasification unit, is on the one hand unfavorable for the enlargement of coal pulverizer, another party
Face is also unfavorable for the enlargement of gasification furnace, limits the upgrading of technology；And mill coal drying unit and fine coal pressurized delivered
Unit and gasification unit are arranged in the same frame, increase the height of entire frame, correspondingly increase investment and system
Overhaul difficulty.
Utility model content
It is single in order to solve mill coal drying unit and fine coal pressurized delivered unit and gasification in existing powdered coal pressuring gasified system
Member cannot achieve the problems such as coal pulverizer and gasification furnace are unfavorable for enlargement caused by non-one-to-one correspondence, and the utility model provides one
Kind coal-grinding and fine coal transport system.
A kind of coal-grinding provided by the utility model and fine coal transport system, including mill coal drying unit and fine coal conveying list
Member；The fine coal supply unit include fine coal surge bunker, gate valve, the first rotary discharge valve, Pneumatic conveying pump, nitrogen system and
Several powder feeding pipelines；The discharge port of the mill coal drying unit is connect with the feeding mouth of the fine coal surge bunker, and the fine coal is slow
The bottom discharge mouth for rushing storehouse connects the feeding mouth of first rotary discharge valve by gate valve, first rotary discharge valve
Discharge port is connect with the feeding mouth of the Pneumatic conveying pump, and the discharge port of the Pneumatic conveying pump is connected to down by powder feeding pipeline
The fine coal storage tank of trip；The nitrogen system connects the Pneumatic conveying pump, for providing low-pressure nitrogen for the Pneumatic conveying pump；
Wherein, the mill coal drying unit, fine coal supply unit are arranged in the frame of coal-grinding island.
In a kind of specific embodiment, the nitrogen system includes nitrogen buffer tank；The entrance of the nitrogen buffer tank
Extraneous low-pressure nitrogen is connect, the outlet of the nitrogen buffer tank connects the air intake of the Pneumatic conveying pump.
In a kind of specific embodiment, the coal-grinding and fine coal transport system include M set mill coal drying units and n set powder
Coal supply unit；Often cover the fine coal supply unit include 1 fine coal surge bunker, k gate valve, a first rotary discharge valves of k,
K Pneumatic conveying pump；The fine coal supply unit further includes multiple first triple valves；
There is m × n to cover normally opened mill coal drying unit and the spare mill coal drying unit of n-1 sets in the M sets mill coal drying unit,
Often set fine coal supply unit fine coal surge bunker feeding mouth connection m cover normally opened mill coal drying unit discharge port and 1 set it is normally opened
The uniquely coupled 1 fine coal surge bunker of mill coal drying unit, the discharge port for often covering spare mill coal drying unit are defeated with 2 sets of fine coal respectively
Send the feeding mouth connection of the fine coal surge bunker of unit and each fine coal uniquely coupled 1 set spare mill coal drying unit of surge bunker；
The bottom discharge mouth of each fine coal surge bunker is equipped with k feed cone, and each feed cone is sequentially connected 1 and inserts
Plate valve, 1 the first rotary discharge valve, 1 Pneumatic conveying pump；In k Pneumatic conveying pump of each fine coal surge bunker bottom connection
There is the discharge port of k-2 Pneumatic conveying pump to be respectively connected with the first triple valve, the other both ends of first triple valve pass through respectively
Powder feeding pipeline is connected to 2 adjacent fine coal storage tanks in downstream, has in k Pneumatic conveying pump of each fine coal surge bunker bottom connection
The discharge port of 2 Pneumatic conveying pumps is directly connected by powder feeding pipeline and 1 fine coal storage tank in downstream, each fine coal storage in downstream
The powder feeding pipeline of tank Pneumatic conveying pump different from coming from two is connected；
Wherein, the M=m × n+n-1, n are the positive integer more than 1, and k is the positive integer more than 2.
In a kind of specific embodiment, the coal-grinding and fine coal transport system further include multiple library overhead-valves, the coal-grinding
And fine coal transport system includes N set mill coal drying units and N set fine coal supply units, it includes connecting successively often to cover fine coal supply unit
1 fine coal surge bunker, 1 gate valve, 1 the first rotary discharge valve, 1 Pneumatic conveying pump connect；The M covers mill coal drying list
There is N-2 to cover normally opened mill coal drying unit and 2 sets of spare mill coal drying units in member；Often set mill coal drying unit is uniquely correspondingly connected with
The discharge port of a set of fine coal supply unit, the often set fine coal supply unit being connect with the normally opened mill coal drying unit passes through powder feeding
Pipeline is uniquely correspondingly connected to 1 fine coal storage tank in downstream, each fine coal conveying being connect with the spare mill coal drying unit
The discharge port of unit is connected to the N-2 fine coal storage tank in downstream by powder feeding pipeline respectively；The fine coal supply unit and downstream
Fine coal storage tank between powder feeding pipeline on be additionally provided with library overhead-valve；Wherein, the N is the positive integer more than 2.
In a kind of specific embodiment, every powder feeding pipeline between the fine coal storage tank in the Pneumatic conveying pump and downstream
On be additionally provided with the second triple valve for being connect with the powder feeding pipeline of other coal-grindings and fine coal transport system.
In a kind of specific embodiment, the mill coal drying unit includes feed coal bunker, Gravimetric Coal Feeders, coal-grinding
Machine, the first fine coal filter, inert gas generator, air blower, seal fan；The discharge port of the feed coal bunker connects institute
The feeding mouth of Gravimetric Coal Feeders is stated, the discharge port of the Gravimetric Coal Feeders connects the feeding mouth of the coal pulverizer, the coal pulverizer
Discharge port connect the input port of the first fine coal filter, the discharge port of the first fine coal filter connects the fine coal
The feeding mouth of surge bunker；The air intake of the inert gas generator connects the air outlet of the air blower, the indifferent gas
The air outlet of body generator connects the first air intake vent of the coal pulverizer, and the second air intake vent of the coal pulverizer connects the sealing
The air outlet of wind turbine；The fuel gas entrance of the inert gas generator connects fuel gas, and the air intake vent of the air blower connects air,
The air intake vent of the seal fan connects air or nitrogen.
In a kind of specific embodiment, the mill coal drying unit further includes being connected to the first fine coal filter
The second rotary discharge valve, fabric filter, screw conveyor between discharge port and the fine coal surge bunker；First fine coal
The discharge port of filter connects the feeding mouth of second rotary discharge valve, and the discharge port of second rotary discharge valve connects institute
The input port of fabric filter is stated, the delivery outlet of the fabric filter connects the feeding mouth of the screw conveyor, the spiral shell
The discharge port of rotation conveyer connects the feeding mouth of the fine coal surge bunker.
In a kind of specific embodiment, the nitrogen system further includes the second fine coal filter, the fine coal in the downstream
The gas outlet of storage tank connects the input port of the second fine coal filter, and the gas outlet of the second fine coal filter is connected to institute
State the third air intake vent of inert gas generator.
In a kind of specific embodiment, the first fine coal filter and the second fine coal filter are bag filter.
In a kind of specific embodiment, the mill coal drying unit further includes circulating fan, the first fine coal filtering
The gas outlet of device connects the air intake vent of the circulating fan, and the air outlet of the circulating fan is connected to the inert gas and occurs
The third air intake vent of device.
The above-mentioned technical proposal of the utility model has the beneficial effect that：
The utility model provides a kind of energy-efficient coal-grinding and fine coal transport system, and mill coal drying unit, fine coal are conveyed
Unit is arranged in the frame of coal-grinding island, can effectively reduce gasification frame and coal-grinding island frame height, to reduce investment, this
Outside, by the structure design of fine coal supply unit, it can realize that mill coal drying unit and fine coal pressurized delivered unit and gasification are single
The non-one-to-one correspondence of member, provides the mutual Preparation Method of fine coal supply unit, improves the stability and reliability of system.
Description of the drawings
Fig. 1 is a kind of coal-grinding provided by the utility model and the structural schematic diagram of fine coal transport system；
Fig. 2 is coal-grinding provided by the utility model and the structural schematic diagram of fine coal transport system embodiment one；
Fig. 3 is coal-grinding provided by the utility model and the structural schematic diagram of fine coal transport system embodiment two；
Fig. 4 is coal-grinding provided by the utility model and the structural schematic diagram of fine coal transport system embodiment three；
Fig. 5 is coal-grinding provided by the utility model and the structural schematic diagram of fine coal transport system example IV.
[reference sign]
1, mill coal drying unit, 2, fine coal supply unit,
11, feed coal bunker, 12, Gravimetric Coal Feeders, 13, coal pulverizer,
14, the first fine coal filter, 15, inert gas generator, 16, air blower,
17, seal fan, 18, circulating fan, 21, fine coal surge bunker,
22, gate valve, the 23, first rotary discharge valve, 24, Pneumatic conveying pump,
25, nitrogen system, the 26, first triple valve, the 27, second triple valve,
28, library overhead-valve, 251, nitrogen buffer tank, the 252, second fine coal filter.
Specific implementation mode
In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, below in conjunction with attached drawing
And specific embodiment is described in detail.
Fig. 1 is a kind of coal-grinding provided by the utility model and the structural schematic diagram of fine coal transport system, as shown in fig. 1,
The system includes mill coal drying unit 1 and fine coal supply unit 2；Wherein, fine coal supply unit 2 includes fine coal surge bunker 21, inserts
Plate valve 22, the first rotary discharge valve 23, Pneumatic conveying pump 24, nitrogen system 25 and several powder feeding pipelines；Mill coal drying unit 1
Discharge port is connect with the feeding mouth of fine coal surge bunker 21, and the bottom discharge mouth of fine coal surge bunker 21 connects first by gate valve 22
The discharge port of the feeding mouth of rotary discharge valve 23, the first rotary discharge valve 23 is connect with the feeding mouth of Pneumatic conveying pump 24, strength
The discharge port of delivery pump 24 is connected to the fine coal storage tank in downstream by powder feeding pipeline；Nitrogen system 25 connects Pneumatic conveying pump 24,
For providing low-pressure nitrogen for Pneumatic conveying pump 24；Wherein, mill coal drying unit 1, fine coal supply unit 2 are arranged in coal-grinding island frame
In frame.
Preferably, nitrogen system 25 includes nitrogen buffer tank 251；The entrance of nitrogen buffer tank 251 connects extraneous low-pressure nitrogen,
The air intake of the outlet connection Pneumatic conveying pump 24 of nitrogen buffer tank 251.
In the present embodiment, fine coal supply unit is by fine coal surge bunker 21, gate valve 22, the first rotary discharge valve 23, strength
24 nitrogen system 25 of delivery pump and several powder feeding pipelines composition.Pumped (conveying) medium needed for fine coal supply unit uses low-pressure nitrogen.System
System uses pressurized seal mode of movement.Fine coal transport system is store according to upstream pulverized coal preparation system mode and downstream gasification installation fine coal
Storehouse distribution situation designs fine coal feed-line, completes fine coal and distributes task.The system conveys mill coal drying unit, fine coal single
Member is arranged in the frame of coal-grinding island, can effectively reduce gasification frame and coal-grinding island frame height, to reduce investment, in addition,
By the structure design of fine coal supply unit, mill coal drying unit and the non-one-to-one correspondence of gasification unit can be realized.
The embodiments of the present invention are described in detail with specific embodiment below.
Embodiment one
The coal-grinding and fine coal transport system provided in the present embodiment includes that M set mill coal drying units and n set fine coal conveyings are single
Member；Often set fine coal supply unit includes 1 fine coal surge bunker, k gate valve, k the first rotary discharge valves, k Geldart-D particles
Pump；Fine coal supply unit further includes multiple first triple valves.Wherein, M, which covers, has the normally opened coal-grinding of m × n sets dry in mill coal drying unit
Dry unit and n-1 cover spare mill coal drying unit, and the feeding mouth connection m sets for often covering the fine coal surge bunker of fine coal supply unit are normally opened
It is dry often to cover spare coal-grinding for the discharge port of mill coal drying unit and 1 set of normally opened uniquely coupled 1 fine coal surge bunker of mill coal drying unit
The discharge port of dry unit connect respectively with the feeding mouth of the fine coal surge bunker of 2 sets of fine coal supply units and each fine coal surge bunker only
One 1 set of spare mill coal drying unit of connection.The bottom discharge mouth of each fine coal surge bunker is equipped with k feed cone, each blanking
Cone is sequentially connected 1 gate valve, 1 the first rotary discharge valve, 1 Pneumatic conveying pump；The k of each fine coal surge bunker bottom connection
There is the discharge port of k-2 Pneumatic conveying pump to be respectively connected with the first triple valve in a Pneumatic conveying pump, other the two of the first triple valve
End is connected to 2 adjacent fine coal storage tanks in downstream, k strength of each fine coal surge bunker bottom connection by powder feeding pipeline respectively
There is the discharge port of 2 Pneumatic conveying pumps directly to be connected by powder feeding pipeline and 1 fine coal storage tank in downstream in delivery pump, downstream
The powder feeding pipeline of each fine coal storage tank Pneumatic conveying pump different from coming from two is connected；Wherein, M=m × n+n-1, n be more than
1 positive integer, k are the positive integer more than 2.
In the present embodiment, often covers fine coal supply unit and normally opened mill coal drying unit and 1 set of spare mill coal drying unit are covered by m
Coal dust is provided, fine coal supply unit is often covered and provides fine coal to the fine coal storage tank in k downstream.
In a specific embodiment, n=2, m=2, i.e. M=5；K=3.
Fig. 2 is coal-grinding provided by the utility model and the structural schematic diagram of fine coal transport system embodiment one, such as institute in Fig. 2
Show, the coal-grinding and fine coal transport system include five sets of mill coal drying units and 2 sets of fine coal supply units, the powder in corresponding 5 downstreams
Coal storage tank, five gasification systems.No. 1 in five sets of mill coal drying units, No. 2, No. 4, No. 5 four sets of mill coal drying units it is normally opened, No. 3
Mill coal drying unit is spare.Often the capacity of set mill coal drying unit be 85 tons/when, every gasification furnace processing capacity is 68
Ton/when.No. 1 and No. 2 mill coal drying units 1 (scheme the fine coal surge bunker 21 that fine coal is exported to first set fine coal supply unit 2
No. 1 fine coal surge bunker 21 in 2)；No. 4 and No. 5 mill coal drying units 1 export fine coal to second set of fine coal supply unit 2
Fine coal surge bunker 21 (i.e. No. 2 fine coal surge bunkers 21 in Fig. 2)；No. 3 mill coal drying units 1 are back-up system, can be defeated by fine coal
It send to the fine coal surge bunker 21 of two sets of fine coal supply units 2.Each 21 bottom discharge mouth of fine coal surge bunker is equipped with 3 feed cones
(i.e. taper feed opening), each feed cone are sequentially connected gate valve 22, the first rotary discharge valve 23 and Pneumatic conveying pump 24 respectively,
Wherein No. 1 and No. 6 Pneumatic conveying pumps 24 are spare.Each Pneumatic conveying pump 24 is defeated by powder feeding pipeline by fine coal using low-pressure nitrogen
Send to the coal dust basin in downstream, wherein No. 2, No. 3, No. 4, No. 5 24 connected powder feeding pipelines of Pneumatic conveying pump be respectively set the one or three
The fine coal that this Pneumatic conveying pump 24 exports can be delivered to two adjacent coal dust basins by port valve 26, since each coal dust is store
Tank has two powder feeding pipelines to be attached thereto, can be by another in the case that a powder feeding pipeline system breaks down wherein
One spare powder feeding pipeline system realizes the supply of fine coal, to improve the reliability and regularity of fine coal transport system.In Fig. 2
The function of the component of identical drawing reference numeral is identical, and explanation merely for convenience is numbered in figure, each in nitrogen system 25 and Fig. 2
The connection relation of component can be referring to Fig. 1, and details are not described herein again.
It preferably, as shown in Figure 2, can be on the wherein powder feeding pipeline that each Pneumatic conveying pump 21 exports in addition
One the second triple valve 27 is set, for being connect with the powder feeding pipeline of other coal-grindings and fine coal transport system 2, can be for other
System provides fine coal.
Embodiment two
In the present embodiment, coal-grinding and fine coal transport system further include multiple library overhead-valves, and coal-grinding and fine coal transport system include N
It covers mill coal drying unit and N covers fine coal supply unit, it includes sequentially connected 1 fine coal surge bunker, 1 often to cover fine coal supply unit
A gate valve, 1 the first rotary discharge valve, 1 Pneumatic conveying pump；There is N-2 to cover normally opened coal-grinding in M set mill coal dryings unit 1 dry
Dry unit and 2 sets of spare mill coal drying units；Often set mill coal drying unit is uniquely correspondingly connected with a set of fine coal supply unit, and normal
The discharge port for opening the often set fine coal supply unit of mill coal drying unit connection is uniquely correspondingly connected to the 1 of downstream by powder feeding pipeline
The discharge port of a fine coal storage tank, each fine coal supply unit being connect with spare mill coal drying unit is connected by powder feeding pipeline respectively
It is connected to the N-2 fine coal storage tank in downstream；It is additionally provided on powder feeding pipeline between fine coal supply unit and the fine coal storage tank in downstream
Library overhead-valve；Wherein, N is the positive integer more than 2.
In a specific embodiment, N=6.Fig. 3 is that coal-grinding provided by the utility model and fine coal transport system are implemented
The structural schematic diagram of example two, as shown in Figure 3, the coal-grinding and fine coal transport system include that (five sets often for six sets of mill coal drying units 1
It opens, a set of spare) correspond to four gasification systems.Often the capacity of set mill coal drying unit 1 be 85 tons/when, every gasification furnace
Processing capacity be 106 tons/when.If No. 1 in Fig. 3, No. 2, No. 3, No. 4 mill coal drying units 1 be normally opened system, No. 5 and No. 6 coal-grindings
Drying unit back-up system each other, set of system works in No. 5 and No. 6 mill coal drying units 1 of normal condition, and another set of system is standby
With.In Fig. 3, a set of mill coal drying unit 1 corresponds to a set of coal dust supply unit 2.Fine coal is delivered to fine coal by mill coal drying unit 1
Surge bunker 21, then after gate valve 22 and the first rotary discharge valve 23 fine coal blanking to Pneumatic conveying pump 24.It is identical in Fig. 3
The function of the component of drawing reference numeral is identical, merely for convenience in figure to illustrate to be numbered, in addition, not having for convenience of expression in Fig. 3
Draw nitrogen system 25, the connection relation of each component can be referring to Fig. 1 in nitrogen system 25 and Fig. 3, and details are not described herein again.
The operation principle of system shown in Figure 3 is No. 1, No. 2, No. 3, No. 4 mill coal drying units 1 be normally opened system, utilization is low
Fine coal is delivered to No. 1, No. 2, No. 3, No. 4 fine coal storage tanks by pressure nitrogen respectively by powder feeding pipeline and library overhead-valve 28；No. 5 and No. 6
Mill coal drying unit 1 is connected by No. 1 of powder feeding pipeline and library overhead-valve 28 and downstream, No. 2, No. 3, No. 4 coal dust basins respectively, coal
Weighing module is provided on powder basin, the Weighing module on 4 coal dust basins weigh comparing, and selects the coal dust of weight minimum
Basin is opened the library overhead-valve certain time (10min~60min) of coal dust No. 5 or No. 6 fine coal transport systems of tank top, past
The defeated coal of this coal dust basin, timing finish, and close the library overhead-valve of this coal dust tank top；Then the coal dust of weight minimum is reselected
Basin repeats a upper operation.
In Fig. 3, each coal dust basin has three powder feeding pipelines to be attached thereto, and a powder feeding pipeline system occurs wherein
In the case of failure, the supply of fine coal can be realized by the corresponding system of spare powder feeding pipeline, the fine coal conveying to improve
The reliability and regularity of system.
It preferably, as shown in Figure 3, can be in every powder feeding pipe between the fine coal storage tank in Pneumatic conveying pump 21 and downstream
In addition one the second triple valve 27 is set on line, it, can be with for being connect with the powder feeding pipeline of other coal-grindings and fine coal transport system 2
Fine coal is provided for other systems.
Embodiment three
Fig. 4 is coal-grinding provided by the utility model and the structural schematic diagram of fine coal transport system embodiment three, such as institute in Fig. 4
Show, on the basis of the coal-grinding and fine coal transport system structure shown in Fig. 1, nitrogen system 25 includes nitrogen buffer tank, and coal-grinding is dry
Dry unit 1 includes feed coal bunker 11, Gravimetric Coal Feeders 12, coal pulverizer 13, the first fine coal filter 14, inert gas generator
15, air blower 16, seal fan 17；The feeding mouth of the discharge port connection Gravimetric Coal Feeders 12 of feed coal bunker 11, weighs to coal
The feeding mouth of the discharge port connection coal pulverizer 13 of machine 12, the discharge port of coal pulverizer 13 connect the input of the first fine coal filter 14
Mouthful, the feeding mouth of the discharge port connection fine coal surge bunker 21 of the first fine coal filter 14；The air of inert gas generator 15 enters
The air outlet of mouth connection air blower 16, the first air intake vent of the air outlet connection coal pulverizer 13 of inert gas generator 15, coal-grinding
The air outlet of the second air intake vent connection seal fan 17 of machine 13；The fuel gas entrance of inert gas generator 15 connects fuel gas,
The air intake vent of air blower 16 connects air, and the air intake vent of seal fan 17 connects air or nitrogen.
The main working process of mill coal drying unit 1 is in system shown in Figure 4：Broken coal from feed coal bunker 11 passes through
It is added in coal pulverizer 13 after in 12 city of Gravimetric Coal Feeders and wears into powdery, and by high temperature inert airflow drying.Inert gas enters
Temperature is 150~300 DEG C when 13 import of coal pulverizer, and temperature is 100~115 DEG C when leaving coal pulverizer.The grinding of coal is real with drying
It is carried out in inert environment on border, thus eliminates the potential danger of spontaneous combustion and dust explosion.
Wherein, the particle size distribution specification of fine coal and the moisture of fine coal meet claimed below：
1) particle size≤90 μm account for 90% (weight)；
2) particle size≤5 μm account for 10% (weight)；
3) (weight, the fine coal flow calibration stage before gasification installation driving, (coal dust followed moisture representative value≤2%
Ring), can be finely adjusted according to actual coal situation and delivery situation).
Then, by inert gas convey drying fine coal detached into the first fine coal filter 14 after, fine coal send to
The fine coal surge bunker 21 of fine coal supply unit 2.
In a kind of specific embodiment, mill coal drying unit 1 further includes the discharge port for being connected to the first fine coal filter
The second rotary discharge valve, fabric filter, screw conveyor between fine coal surge bunker 21；First fine coal filter 14 goes out
Material mouth connects the feeding mouth of the second rotary discharge valve, and the discharge port of the second rotary discharge valve connects the input port of fabric filter,
The feeding mouth of the delivery outlet connection screw conveyor of fabric filter, the discharge port connection fine coal surge bunker 21 of screw conveyor
Feeding mouth.In the present embodiment, the fine coal after the separation of the first fine coal filter 14 is sent through equipment such as rotary discharge valve, Celloco fractionator Cellocos
To coal dust surge bunker, Pneumatic conveying pump 21 is connect under coal dust surge bunker, and fine coal is delivered to by gasification dress by different proportion schemes
Set coal pressurization and the fine coal bunker into coal unit.Obviously, the concrete structure of mill coal drying unit shown in Fig. 4 can also be used for Fig. 2 and
Embodiment illustrated in fig. 3, details are not described herein again.
Example IV
Fig. 5 is coal-grinding provided by the utility model and the structural schematic diagram of fine coal transport system example IV, such as institute in Fig. 5
Show, on the basis of the coal-grinding and fine coal transport system structure shown in Fig. 4, nitrogen system 25 further includes the second fine coal filter
252, the gas outlet of the fine coal storage tank in downstream connects the input port of the second fine coal filter 252, and the second fine coal filter 252 goes out
Gas port is connected to the third air intake vent of inert gas generator 15.In the present embodiment, pumped (conveying) medium is adopted needed for fine coal supply unit
With low-pressure nitrogen, after fine coal is delivered in coal dust basin with low-pressure nitrogen, fine coal stays in coal dust basin, and low-pressure nitrogen passes through
Pressure reduction after second fine coal filter 252, becomes normal pressure nitrogen, is recycled to the recycling of inert gas generator 15, to
It reduces investment outlay, reduces energy consumption.
Preferably, the first fine coal filter 14 and the second fine coal filter 252 are bag filter.
Preferably, as shown in Figure 5, mill coal drying unit 1 may also include circulating fan 18, the first fine coal filter 14
Gas outlet connects the air intake vent of circulating fan 18, and the third that the air outlet of circulating fan 18 is connected to inert gas generator 15 enters
Air port.In the present embodiment, filtered inert gas contains ＜ 10mg/Nm3 (wet basis) fine coal, and recycling is low for fine coal conveying
Nitrogen is pressed, entering inert gas generator through circulating fan recycles, and to reduce investment outlay, reduces energy consumption.
Obviously, the concrete structure of mill coal drying unit shown in Fig. 5 can also be used for Fig. 2 and embodiment illustrated in fig. 3, herein no longer
It repeats.
The utility model provides a kind of energy-efficient coal-grinding and fine coal transport system, and mill coal drying unit, fine coal are conveyed
Unit is arranged in the frame of coal-grinding island, can effectively reduce gasification frame and coal-grinding island frame height (is reduced to 45 meters from 90 meters
Left and right), to reduce investment.The utility model also solves mill coal drying unit and cannot achieve non-one-to-one correspondence with gasification unit
The problem of, it can realize the enlargement of coal pulverizer and be conducive to the enlargement of gasification furnace, reduce the configuration of mill coal drying unit；From
And reduce investment outlay, reduce energy consumption.And the mutual Preparation Method of fine coal transport system is provided, improve the stability of system and reliable
Property.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, under the premise of not departing from principle described in the utility model, several improvements and modifications can also be made, these improvement
The scope of protection of the utility model is also should be regarded as with retouching.
Claims (10)
1. a kind of coal-grinding and fine coal transport system, which is characterized in that including mill coal drying unit and fine coal supply unit；The powder
Coal supply unit includes fine coal surge bunker, gate valve, the first rotary discharge valve, Pneumatic conveying pump, nitrogen system and several powder feedings
Pipeline；The discharge port of the mill coal drying unit is connect with the feeding mouth of the fine coal surge bunker, the bottom of the fine coal surge bunker
Portion's discharge port connects the feeding mouth of first rotary discharge valve by gate valve, the discharge port of first rotary discharge valve with
The feeding mouth of the Pneumatic conveying pump connects, and the discharge port of the Pneumatic conveying pump is connected to the fine coal in downstream by powder feeding pipeline
Storage tank；The nitrogen system connects the Pneumatic conveying pump, for providing low-pressure nitrogen for the Pneumatic conveying pump；Wherein, institute
State mill coal drying unit, fine coal supply unit is arranged in the frame of coal-grinding island.
2. coal-grinding as described in claim 1 and fine coal transport system, which is characterized in that the nitrogen system includes nitrogen buffering
Tank；The entrance of the nitrogen buffer tank connects extraneous low-pressure nitrogen, and the outlet of the nitrogen buffer tank connects the Pneumatic conveying pump
Air intake.
3. coal-grinding as claimed in claim 2 and fine coal transport system, which is characterized in that the coal-grinding and fine coal transport system packet
Include M set mill coal drying units and n set fine coal supply units；It is a including 1 fine coal surge bunker, k often to cover the fine coal supply unit
Gate valve, k the first rotary discharge valves, k Pneumatic conveying pumps；The fine coal supply unit further includes multiple first triple valves；
There is m × n to cover normally opened mill coal drying unit and the spare mill coal drying unit of n-1 sets in the M sets mill coal drying unit, often covers
The feeding mouth connection m of the fine coal surge bunker of fine coal supply unit covers the discharge port and 1 set of normally opened coal-grinding of normally opened mill coal drying unit
The uniquely coupled 1 fine coal surge bunker of drying unit, the discharge port for often covering spare mill coal drying unit are single with 2 sets of fine coal conveyings respectively
The feeding mouth connection of the fine coal surge bunker of member and each fine coal uniquely coupled 1 set spare mill coal drying unit of surge bunker；
The bottom discharge mouth of each fine coal surge bunker is equipped with k feed cone, and each feed cone is sequentially connected 1 plate
Valve, 1 the first rotary discharge valve, 1 Pneumatic conveying pump；Have in k Pneumatic conveying pump of each fine coal surge bunker bottom connection
The discharge port of k-2 Pneumatic conveying pump is respectively connected with the first triple valve, and the other both ends of first triple valve are respectively by sending
Tube cell line is connected to 2 adjacent fine coal storage tanks in downstream, has 2 in k Pneumatic conveying pump of each fine coal surge bunker bottom connection
The discharge port of a Pneumatic conveying pump is directly connected by powder feeding pipeline and 1 fine coal storage tank in downstream, each fine coal storage in downstream
The powder feeding pipeline of tank Pneumatic conveying pump different from coming from two is connected；
Wherein, the M=m × n+n-1, n are the positive integer more than 1, and k is the positive integer more than 2.
4. coal-grinding as claimed in claim 2 and fine coal transport system, which is characterized in that the coal-grinding and fine coal transport system are also
Including multiple library overhead-valves, the coal-grinding and fine coal transport system include that N set mill coal drying units and N cover fine coal supply unit, often
It includes sequentially connected 1 fine coal surge bunker, 1 gate valve, 1 the first rotary discharge valve, 1 strength to cover fine coal supply unit
Delivery pump；There is N-2 to cover normally opened mill coal drying unit and 2 sets of spare mill coal drying units in the M sets mill coal drying unit；Often cover
Mill coal drying unit is uniquely correspondingly connected with a set of fine coal supply unit, the often set fine coal being connect with the normally opened mill coal drying unit
The discharge port of supply unit is uniquely correspondingly connected to 1 fine coal storage tank in downstream by powder feeding pipeline, dry with the spare coal-grinding
The N-2 fine coal that the discharge port of each fine coal supply unit of dry unit connection is connected to downstream by powder feeding pipeline respectively stores up
Tank；It is additionally provided with library overhead-valve on powder feeding pipeline between the fine coal supply unit and the fine coal storage tank in downstream；Wherein, the N
For the positive integer more than 2.
5. coal-grinding as described in claim 3 or 4 and fine coal transport system, which is characterized in that the Pneumatic conveying pump and downstream
Fine coal storage tank between every powder feeding pipeline on be additionally provided with for the powder feeding pipeline with other coal-grindings and fine coal transport system
Second triple valve of connection.
6. coal-grinding as claimed in claim 5 and fine coal transport system, which is characterized in that the mill coal drying unit includes raw material
Coal bunker, Gravimetric Coal Feeders, coal pulverizer, the first fine coal filter, inert gas generator, air blower, seal fan；The original
The discharge port of material coal bunker connects the feeding mouth of the Gravimetric Coal Feeders, and the discharge port of the Gravimetric Coal Feeders connects the coal-grinding
The feeding mouth of machine, the discharge port of the coal pulverizer connect the input port of the first fine coal filter, the first fine coal filtering
The discharge port of device connects the feeding mouth of the fine coal surge bunker；The air intake of the inert gas generator connects the air blast
The air outlet of the air outlet of machine, the inert gas generator connects the first air intake vent of the coal pulverizer, the coal pulverizer
Second air intake vent connects the air outlet of the seal fan；The fuel gas entrance of the inert gas generator connects fuel gas, institute
The air intake vent for stating air blower connects air, and the air intake vent of the seal fan connects air or nitrogen.
7. coal-grinding as claimed in claim 6 and fine coal transport system, which is characterized in that the mill coal drying unit further includes connecting
The second rotary discharge valve, the fiber filter being connected between the discharge port of the first fine coal filter and the fine coal surge bunker
Device, screw conveyor；The discharge port of the first fine coal filter connects the feeding mouth of second rotary discharge valve, and described
The discharge port of two rotary discharge valves connects the input port of the fabric filter, described in the delivery outlet connection of the fabric filter
The feeding mouth of screw conveyor, the discharge port of the screw conveyor connect the feeding mouth of the fine coal surge bunker.
8. coal-grinding as claimed in claim 6 and fine coal transport system, which is characterized in that the nitrogen system further includes the second powder
Coal filter, the gas outlet of the fine coal storage tank in the downstream connect the input port of the second fine coal filter, second powder
The gas outlet of coal filter is connected to the third air intake vent of the inert gas generator.
9. coal-grinding as claimed in claim 8 and fine coal transport system, which is characterized in that the first fine coal filter and second
Fine coal filter is bag filter.
10. coal-grinding as claimed in claim 6 and fine coal transport system, which is characterized in that the mill coal drying unit further includes
The gas outlet of circulating fan, the first fine coal filter connects the air intake vent of the circulating fan, and the circulating fan goes out
Air port is connected to the third air intake vent of the inert gas generator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721730304.9U CN207698789U (en) | 2017-12-13 | 2017-12-13 | A kind of coal-grinding and fine coal transport system |
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| CN201721730304.9U CN207698789U (en) | 2017-12-13 | 2017-12-13 | A kind of coal-grinding and fine coal transport system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113375183A (en) * | 2021-06-09 | 2021-09-10 | 山东聚能生物质能源有限公司 | Stokehold buffer bin and powder grinding system for biomass power generation system coupled with coal burner unit |
-
2017
- 2017-12-13 CN CN201721730304.9U patent/CN207698789U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113375183A (en) * | 2021-06-09 | 2021-09-10 | 山东聚能生物质能源有限公司 | Stokehold buffer bin and powder grinding system for biomass power generation system coupled with coal burner unit |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| IP01 | Partial invalidation of patent right |
Commission number: 5W119694 Conclusion of examination: Maintain the validity of the patent right on the basis of claims 3-10. Decision date of declaring invalidation: 20201026 Decision number of declaring invalidation: 46515 Denomination of utility model: A coal grinding and pulverized coal conveying system Granted publication date: 20180807 Patentee: Changzheng Engineering Co.,Ltd. |
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| IP01 | Partial invalidation of patent right |