CN107954218A - Coal grinding and pulverized coal conveying system - Google Patents
Coal grinding and pulverized coal conveying system Download PDFInfo
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- CN107954218A CN107954218A CN201711326334.8A CN201711326334A CN107954218A CN 107954218 A CN107954218 A CN 107954218A CN 201711326334 A CN201711326334 A CN 201711326334A CN 107954218 A CN107954218 A CN 107954218A
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- 239000003245 coal Substances 0.000 title claims abstract description 422
- 238000000227 grinding Methods 0.000 title claims abstract description 66
- 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
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 49
- 239000000843 powder Substances 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 3
- 230000035611 feeding Effects 0.000 claims 20
- 239000000835 fiber Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 238000002309 gasification Methods 0.000 abstract description 23
- 241000273930 Brevoortia tyrannus Species 0.000 description 47
- 239000002817 coal dust Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 10
- 239000002245 particle Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 206010013786 Dry skin Diseases 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 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
- 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
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 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
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 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
- 238000004064 recycling Methods 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/16—Gas pressure systems operating with fluidisation of the materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
- B65G2201/045—Sand, soil and mineral ore
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention provides a coal grinding and pulverized coal conveying system, which belongs to the technical field of pulverized coal pressure gasification and is used for solving the problem that a coal grinding drying unit, a pulverized coal pressure conveying unit and a gasification unit in the conventional pulverized coal pressure gasification system must be in one-to-one correspondence; the pulverized coal conveying unit comprises a pulverized coal buffer bin, a gate valve, a first rotary discharge valve, a pneumatic conveying pump, a nitrogen system and a plurality of powder conveying pipelines; the discharge port of the coal grinding drying unit is sequentially connected with the pulverized coal buffer bin, the gate valve, the first rotary discharge valve and the pneumatic conveying pump, and the discharge port of the pneumatic conveying pump is connected to a downstream pulverized coal storage tank through a powder conveying pipeline; the nitrogen system is connected with the pneumatic conveying pump and is used for providing low-pressure nitrogen for the pneumatic conveying pump; the coal grinding drying unit and the pulverized coal conveying unit are arranged in the coal grinding island frame. The invention can reduce investment and has high stability and reliability.
Description
Technical field
The present invention relates to powdered coal pressuring gasified technical field, more particularly to a kind of energy saving coal-grinding and fine coal transport system.
Background technology
Powdered coal pressuring gasified technology is a kind of cleaning, all kinds of solid coals efficiently is changed into gaseous hydrogen and an oxygen
Change the advanced technology of carbon mixed gas, its 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 maximization of coal pulverizer, the opposing party
Face is also unfavorable for the maximization 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 same frame, add the height of whole frame, correspondingly increase investment and system
Overhaul difficulty.
The content of the invention
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 can not realize the problems such as coal pulverizer and gasification furnace are unfavorable for maximization caused by non-one-to-one corresponding, and the present invention provides a kind of mill
Coal and fine coal transport system.
A kind of coal-grinding provided by the invention and fine coal transport system, including mill coal drying unit and fine coal supply unit；Institute
Stating fine coal supply unit includes fine coal surge bunker, gate valve, the first rotary discharge valve, Pneumatic conveying pump, nitrogen system and some
Powder feeding pipeline；The discharge port of the mill coal drying unit is connected with the feeding mouth of the fine coal surge bunker, the fine coal surge bunker
Bottom discharge mouth the feeding mouth of first rotary discharge valve, the discharging of first rotary discharge valve are connected by gate valve
Mouth is connected with the feeding mouth of the Pneumatic conveying pump, and the discharge port of the Pneumatic conveying pump is connected to downstream by powder feeding pipeline
Fine coal storage tank；The nitrogen system connects the Pneumatic conveying pump, for providing low-pressure nitrogen for the Pneumatic conveying pump；Its
In, 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, coal-grinding and the fine coal transport system includes M set mill coal drying units and n set powder
Coal supply unit；Often cover the fine coal supply unit include a first rotary discharge valves of 1 fine coal surge bunker, k gate valve, 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 n-1 in the M sets mill coal drying unit and cover spare mill coal drying unit,
Often cover the discharge port of the normally opened mill coal drying unit of feeding mouth connection m sets of the fine coal surge bunker of fine coal supply unit and 1 set 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 provided 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
The discharge port for having k-2 Pneumatic conveying pump is respectively connected with the first triple valve, and 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, coal-grinding and the fine coal transport system further includes multiple storehouse overhead-valves, the coal-grinding
And fine coal transport system includes N set mill coal drying units and N set fine coal supply units, often covering fine coal supply unit includes connecting successively
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 cover the uniquely corresponding connection of mill coal drying unit
A set of fine coal supply unit, the discharge port for often covering fine coal supply unit being connected with the normally opened mill coal drying unit pass through powder feeding
Pipeline is uniquely correspondingly connected to 1 fine coal storage tank in downstream, each fine coal conveying being connected 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 storehouse 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 connected 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 connection institute of the feed coal bunker
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, which further includes, is 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, the discharge port connection institute of second rotary discharge valve
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 for revolving 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 3rd 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
3rd air intake vent of device.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
The present invention provides a kind of energy saving coal-grinding and fine coal transport system, by mill coal drying unit, fine coal supply unit
It is arranged in the frame of coal-grinding island, can effectively reduces gasification frame and coal-grinding island frame height, so that investment is reduced, in addition, logical
The structure design of fine coal supply unit is crossed, can realize the non-of mill coal drying unit and fine coal pressurized delivered unit and gasification unit
Correspond, there is provided the mutual Preparation Method of fine coal supply unit, improves the stability and reliability of system.
Brief description of the drawings
Fig. 1 is a kind of coal-grinding provided by the invention and the structure diagram of fine coal transport system；
Fig. 2 is coal-grinding provided by the invention and the structure diagram of fine coal transport system embodiment one；
Fig. 3 is coal-grinding provided by the invention and the structure diagram of fine coal transport system embodiment two；
Fig. 4 is coal-grinding provided by the invention and the structure diagram of fine coal transport system embodiment three；
Fig. 5 is coal-grinding provided by the invention and the structure diagram of fine coal transport system example IV.
[description of reference numerals]
1st, mill coal drying unit, 2, fine coal supply unit,
11st, feed coal bunker, 12, Gravimetric Coal Feeders, 13, coal pulverizer,
14th, the first fine coal filter, 15, inert gas generator, 16, air blower,
17th, seal fan, 18, circulating fan, 21, fine coal surge bunker,
22nd, gate valve, the 23, first rotary discharge valve, 24, Pneumatic conveying pump,
25th, nitrogen system, the 26, first triple valve, the 27, second triple valve,
28th, storehouse overhead-valve, 251, nitrogen buffer tank, the 252, second fine coal filter.
Embodiment
To make the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Fig. 1 is a kind of coal-grinding provided by the invention and the structure diagram of fine coal transport system, and as shown in fig. 1, this is
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, gate valve
22nd, the first rotary discharge valve 23, Pneumatic conveying pump 24, nitrogen system 25 and some powder feeding pipelines；The discharging of mill coal drying unit 1
Mouth is connected with the feeding mouth of fine coal surge bunker 21, and the bottom discharge mouth of fine coal surge bunker 21 passes through first rotation of the connection of gate valve 22
The feeding mouth of discharge valve 23, the discharge port of the first rotary discharge valve 23 are connected with the feeding mouth of Pneumatic conveying pump 24, Geldart-D particle
The discharge port of pump 24 is connected to the fine coal storage tank in downstream by powder feeding pipeline；Nitrogen system 25 connects Pneumatic conveying pump 24, is used for
Low-pressure nitrogen is provided for Pneumatic conveying pump 24；Wherein, mill coal drying unit 1, fine coal supply unit 2 are arranged in coal-grinding island frame
It is interior.
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 some 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 distribution 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, so that investment is reduced, in addition,
By the structure design of fine coal supply unit, mill coal drying unit and the non-one-to-one corresponding of gasification unit can be realized.
Below with the specific embodiment embodiment that the present invention will be described in detail.
Embodiment one
The coal-grinding and fine coal transport system provided in the present embodiment includes M set mill coal drying units and n set fine coal conveyings are single
Member；Often covering fine coal supply unit includes 1 fine coal surge bunker, k gate valve, k the first rotary discharge valve, k Geldart-D particle
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 to do 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
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, often cover spare coal-grinding and do
The discharge port of dry unit be connected 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 provided 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
The discharge port for having k-2 Pneumatic conveying pump in a Pneumatic conveying pump is respectively connected with the first triple valve, and 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
The discharge port for having 2 Pneumatic conveying pumps in delivery pump is directly connected by powder feeding pipeline and 1 fine coal storage tank in downstream, 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 cover 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 the structure diagram of coal-grinding provided by the invention and fine coal transport system embodiment one, as shown in Figure 2,
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 fine coal storage in corresponding 5 downstreams
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 coal-grindings
Drying unit is spare.Often cover the capacity of mill coal drying unit for 85 tons/when, every gasification furnace disposal ability for 68 tons/when.
No. 1 and No. 2 mill coal drying units 1 export fine coal to the fine coal surge bunker 21 (i.e. 1 in Fig. 2 of first set fine coal supply unit 2
Number fine coal surge bunker 21)；The fine coal that No. 4 and No. 5 mill coal drying units 1 export fine coal to second set of fine coal supply unit 2 delays
Rush storehouse 21 (i.e. No. 2 fine coal surge bunkers 21 in Fig. 2)；No. 3 mill coal drying units 1 are back-up system, fine coal can be delivered to two
Cover the fine coal surge bunker 21 of fine coal supply unit 2.Each 21 bottom discharge mouth of fine coal surge bunker is provided with 3 feed cones and (bores
Shape feed opening), each feed cone is sequentially connected gate valve 22, the first rotary discharge valve 23 and Pneumatic conveying pump 24 respectively, wherein 1
Number and No. 6 Pneumatic conveying pumps 24 be spare.Fine coal is delivered to by each Pneumatic conveying pump 24 using low-pressure nitrogen by powder feeding pipeline
The coal dust basin in downstream, wherein No. 2, No. 3, No. 4, No. 5 Pneumatic conveying pumps 24 connect powder feeding pipeline and set the first triple valve respectively
26, the fine coal that this Pneumatic conveying pump 24 exports can be delivered to two adjacent coal dust basins, due to each coal dust basin
There are two powder feeding pipelines to be attached thereto, in the case that a powder feeding pipeline system breaks down wherein, another can be passed through
Spare powder feeding pipeline system realizes the supply of fine coal, so as to improve the reliability and regularity of fine coal transport system.It is identical in Fig. 2
The function of the component of drawing reference numeral is identical, and explanation merely for convenience is numbered in figure, each component in nitrogen system 25 and Fig. 2
Connection relation can be referring to Fig. 1, details are not described herein again.
Preferably, as shown in Figure 2, can each Pneumatic conveying pump 21 export wherein on a powder feeding pipeline in addition
One the second triple valve 27 is set, for being connected 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 storehouse overhead-valves, and coal-grinding and fine coal transport system include N
Mill coal drying unit and N set fine coal supply units are covered, often covering fine coal supply unit includes sequentially connected 1 fine coal surge bunker, 1
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 to do
Dry unit and 2 sets of spare mill coal drying units；Often cover that mill coal drying unit is uniquely corresponding to connect a set of fine coal supply unit, it is and normal
The discharge port for often covering fine coal supply unit for opening the connection of mill coal drying unit is uniquely correspondingly connected to the 1 of downstream by powder feeding pipeline
A fine coal storage tank, the discharge port for each fine coal supply unit being connected with spare mill coal drying unit are connected by powder feeding pipeline respectively
It is connected to the N-2 fine coal storage tank in downstream；It is additionally provided with powder feeding pipeline between fine coal supply unit and the fine coal storage tank in downstream
Storehouse overhead-valve；Wherein, N is the positive integer more than 2.
In a specific embodiment, N=6.Fig. 3 is coal-grinding provided by the invention and fine coal transport system embodiment two
Structure diagram, as shown in Figure 3, the coal-grinding and fine coal transport system include six sets of mill coal drying units 1 (five sets are normally opened,
It is a set of spare) correspond to four gasification systems.Often cover the capacity of mill coal drying unit 1 for 85 tons/when, every gasification furnace processing
Ability for 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 mill coal dryings
Unit back-up system each other, set of system works in No. 5 and No. 6 mill coal drying units 1 of normal condition, another set of system reserve.
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 and delayed by mill coal drying unit 1
Rush storehouse 21, then after 22 and first rotary discharge valve 23 of gate valve fine coal blanking to Pneumatic conveying pump 24.It is identical attached in Fig. 3
The function of the component of figure grade is identical, and explanation merely for convenience is numbered in figure, in addition, not having in Fig. 3 for convenience of expression
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 storehouse overhead-valve 28；No. 5 and No. 6
Mill coal drying unit 1 is connected by No. 1 of powder feeding pipeline and storehouse overhead-valve 28 and downstream, No. 2, No. 3, No. 4 coal dust basins respectively, coal
It is provided with Weighing module 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 storehouse 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 storehouse 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, so that the fine coal conveying improved
The reliability and regularity of system.
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, can be with for being connected 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 the structure diagram of coal-grinding provided by the invention and fine coal transport system embodiment three, as shown in Figure 4,
On the basis of structure shown in Fig. 1, nitrogen system 25 includes nitrogen buffer tank, mill coal drying list for the coal-grinding and fine coal transport system
Member 1 include 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, Gravimetric Coal Feeders 12
Discharge port connection coal pulverizer 13 feeding mouth, the discharge port of coal pulverizer 13 connects the input port of the first fine coal filter 14, the
The feeding mouth of the discharge port connection fine coal surge bunker 21 of one fine coal filter 14；The air intake connection of inert gas generator 15
The air outlet of air blower 16, the first air intake vent of the air outlet connection coal pulverizer 13 of inert gas generator 15, coal pulverizer 13
Second air intake vent connects the air outlet of seal fan 17；The fuel gas entrance of inert gas generator 15 connects fuel gas, air blower
16 air intake vent 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 to after in 12 city of Gravimetric Coal Feeders in coal pulverizer 13 and wears into powdery, and by high temperature inert airflow drying.Inert gas enters
Temperature is 150~300 DEG C during 13 import of coal pulverizer, and temperature is 100~115 DEG C when leaving coal pulverizer.The grinding of coal is real with drying
Carried out on border in inert environment, thus eliminate 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 separated 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 equipment such as the rotated discharge valve of fine coal, Celloco fractionator Celloco after the separation of the first fine coal filter 14 is sent
To coal dust surge bunker, Pneumatic conveying pump 21 is connect under coal dust surge bunker, fine coal is delivered to by gasification dress by different proportion schemes
Put 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 the structure diagram of coal-grinding provided by the invention and fine coal transport system example IV, as shown in Figure 5,
On the basis of structure shown in Fig. 4, nitrogen system 25 further includes the second fine coal filter 252 for the coal-grinding and fine coal transport system,
The gas outlet of the fine coal storage tank in downstream connects the input port of the second fine coal filter 252, the gas outlet of the second fine coal filter 252
It is connected to the 3rd air intake vent of inert gas generator 15.In the present embodiment, pumped (conveying) medium needed for fine coal supply unit is using low
Nitrogen is pressed, after fine coal is delivered in coal dust basin with low-pressure nitrogen, fine coal is stayed in coal dust basin, and low-pressure nitrogen passes through second
Pressure reduces after fine coal filter 252, becomes normal pressure nitrogen, is recycled to inert gas generator 15 and recycles, so as to save
Investment, 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 air outlet of circulating fan 18 is connected to the 3rd of inert gas generator 15 and enters
Air port.In the present embodiment, the inert gas after filtering contains ＜ 10mg/Nm3 (wet basis) fine coal, and recycling is used for the low of fine coal conveying
Nitrogen is pressed, is recycled through circulating fan into inert gas generator, so as 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
Repeat.
The present invention provides a kind of energy saving coal-grinding and fine coal transport system, by mill coal drying unit, fine coal supply unit
It is arranged in the frame of coal-grinding island, can effectively reduces gasification frame and coal-grinding island frame height (is reduced to 45 meters of left sides from 90 meters
It is right), so as to reduce investment.It can not realize and non-ask correspondingly this invention also solves mill coal drying unit and gasification unit
Topic, can realize the maximization of coal pulverizer and be conducive to the maximization of gasification furnace, reduce the configuration of mill coal drying unit；So as to save
Investment-saving, reduces energy consumption.And the mutual Preparation Method of fine coal transport system is provided, improve the stability and reliability of system.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of coal-grinding and fine coal transport system, it is characterised 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 some powder feedings
Pipeline；The discharge port of the mill coal drying unit is connected 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 connection of the Pneumatic conveying pump, the discharge port of the Pneumatic conveying pump are 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 claimed in claim 1 and fine coal transport system, it is characterised in that the nitrogen system is buffered including nitrogen
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, it is characterised in that coal-grinding and fine coal the transport system bag
Include M set mill coal drying units and n set fine coal supply units；Often covering the fine coal supply unit includes 1 fine coal surge bunker, k
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 n-1 in the M sets mill coal drying unit and cover spare mill coal drying unit, often cover
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 provided 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, it is characterised in that coal-grinding and the fine coal transport system is also
Including multiple storehouse overhead-valves, coal-grinding and the fine coal transport system includes N set mill coal drying units and N set fine coal supply units, often
Covering fine coal supply unit includes sequentially connected 1 fine coal surge bunker, 1 gate valve, 1 the first rotary discharge valve, 1 strength
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 corresponding to connect a set of fine coal supply unit, the often set fine coal being connected 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, is done 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；Storehouse overhead-valve is additionally provided with 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 and fine coal transport system as described in claim 3 or 4, it is characterised 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, it is characterised 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
Expect that the discharge port of coal bunker connects the feeding mouth of the Gravimetric Coal Feeders, 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 machine, the air outlet of the inert gas generator connect 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, it is characterised in that the mill coal drying unit further includes company
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
The discharge ports 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, it is characterised 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 3rd air intake vent of the inert gas generator.
9. coal-grinding as claimed in claim 8 and fine coal transport system, it is characterised 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, it is characterised in that the mill coal drying unit further includes
Circulating fan, the gas outlet of the first fine coal filter connect the air intake vent of the circulating fan, and the circulating fan goes out
Air port is connected to the 3rd air intake vent of the inert gas generator.
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| CN201711326334.8A CN107954218A (en) | 2017-12-13 | 2017-12-13 | Coal grinding and pulverized coal conveying system |
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| CN201711326334.8A CN107954218A (en) | 2017-12-13 | 2017-12-13 | Coal grinding and pulverized coal conveying system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404650A (en) * | 2019-07-04 | 2019-11-05 | 国能绿色能源股份有限公司 | A kind of safe and efficient coal mill system and its method for preparing lignite |
| CN115215101A (en) * | 2022-06-15 | 2022-10-21 | 四川新威凌金属新材料有限公司 | Zinc powder remote pneumatic conveying system adopting nitrogen protection |
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