CN108659909A - A kind of efficient upgrading system of lignite and its method for upgrading of sub-prime classification - Google Patents

A kind of efficient upgrading system of lignite and its method for upgrading of sub-prime classification Download PDF

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Publication number
CN108659909A
CN108659909A CN201810299944.1A CN201810299944A CN108659909A CN 108659909 A CN108659909 A CN 108659909A CN 201810299944 A CN201810299944 A CN 201810299944A CN 108659909 A CN108659909 A CN 108659909A
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China
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lignite
sub
upgrading
flue gas
level
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王鹏云
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YUNNAN ZHONGYI DINGDONG ENERGY TECHNOLOGY DEVELOPMENT Co Ltd
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YUNNAN ZHONGYI DINGDONG ENERGY TECHNOLOGY DEVELOPMENT Co Ltd
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Priority to CN201810299944.1A priority Critical patent/CN108659909A/en
Publication of CN108659909A publication Critical patent/CN108659909A/en
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L9/00Treating solid fuels to improve their combustion
    • C10L9/08Treating solid fuels to improve their combustion by heat treatments, e.g. calcining
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/08Drying or removing water

Abstract

The present invention relates to the efficient upgrading systems of lignite and its method for upgrading of a kind of classification of sub-prime.A kind of efficient upgrading system of lignite of sub-prime classification of the present invention, dissolve poly- upgrading system, sub-prime classifying equipoment and air-transport system including pre-processing device, eddy flow, pre-processing device includes loading machine, crusher, conveying equipment, vibrating screen and apparatus for feeding, eddy flow dissolves the hot-blast stove that poly- upgrading system includes drying machine and provides high-temperature flue gas for drying machine, and sub-prime classifying equipoment includes level-one flue gas sorting separator, secondary smoke sorting separator, three-level separator.Advantage is:It in such a way that the brown coal powder after drying and upgrading is discharged with high-temperature flue gas, increases the dehydration rate of lignite and reduces dewatered grain size, the low brown coal powder of uniform particle sizes, moisture can be obtained.The brown coal powder sub-prime after drying is classified by the way that multiple-stage separator is arranged, low-ash electric coal, high-ash high temperature furnace fire coal and the coal dust with economic value added can be obtained.

Description

A kind of efficient upgrading system of lignite and its method for upgrading of sub-prime classification
Technical field
The present invention relates to lignite upgrading field, more particularly to the efficient upgrading system of lignite of a kind of sub-prime classification and its upgrading Method.
Background technology
China is the basic energy with coal, with increasingly prominent, the coal high-efficiency of problem of environmental pollution and shortage of resources problem Using very urgent.China is still in industrialization, historical stage that urbanization is accelerated development.Energy demand total amount still has growth Space, coal accounts for 90% or more of China's fossil energy resource, and within suitable long-term, the main body energy position of coal will not become Change, the ecologically environmental restriction of coal development is increasingly strengthened.Coal Clean Efficient Development utilizes as the primary of energy Transformation Development Task.
Lignite is the relatively low pit coal of degree of coalification, is after peat deposits through being dehydrated, being compacted to be changed into organic-biological rock Initial stage product, gain the name because appearance is brown or crineous.Lignite is a kind of huge colm of reserves, and lignite accounts for about China The 18% of power coal reserves is distributed mainly on the areas such as the Inner Mongol, three provinces in the northeast of China and Yunnan.Lignite has volatile matter height (Vdaf > 37%), moisture it is high (total moisture is about 30%, free moisture mostly more than 19%), calorific value low (about 12.56MJ/kg), The features such as ash fusion point low (about 1150 DEG C), low (the HGI 50-70) of abrasiveness and easy spontaneous combustion.The characteristics of lignite " two high three is low ", determines The use for having determined lignite has technical barrier.
Since lignite moisture content is high, calorific value is low, easy-weathering spontaneous combustion, and the transportation cost of unit energy is high, is unfavorable for defeated over long distances It send and stores.The direct combustion thermal efficiency of lignite is also very low.Lignite is required for handle as raw material during liquefaction, destructive distillation and gasification Moisture content in coal is down to 10% or less.Therefore lignite upgrading processing is known as the key that lignite Efficient Development utilizes.So-called lignite upgrading Refer to lignite durings dehydration, molding and thermal decomposition etc., the Nomenclature Composition and Structure of Complexes of coal changes, and is converted to approximate bituminous coal The upgraded coal of property.
Existing brown coal drying and upgrading system, which is substantially, separates lignite discharge port and high-temperature flue gas with dust, lignite The shortcomings that discharge port is arranged in bottom, and the high-temperature flue gas with dust is discharged by top, such technique is that dehydration rate is low, high temperature cigarette Gas can become flat from the lignite discharge outlet of bottom, cause security risk.
It is well known that lignite complicated component, has available high value ingredient (such as lignite wax and humic acid), still The disadvantage that its moisture is high, ash content is high also appears undoubtedly, and brown coal drying and upgrading system is all that will be directly used as after brown coal drying at present Electric coal, but high-ash brown coal powder reduces the calorific value of lignite, and transportation cost greatly increases, and do not make good use of lignite Valuable components (such as lignite wax and humic acid).
To sum up, a kind of dehydration rate height is provided, operational safety, the lignite that the lignite sub-prime after drying is classified can efficiently be carried Matter system and its method for upgrading are that the wound of the present invention grinds motivation.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of dehydration rate height, operational safety, can will do The efficient upgrading system of lignite and its method for upgrading of lignite sub-prime classification after dry.
A kind of efficient upgrading system of lignite of sub-prime classification provided by the invention, technical solution are:
A kind of efficient upgrading system of lignite of sub-prime classification, including pre-processing device, eddy flow dissolve poly- upgrading system, sub-prime Classifying equipoment and air-transport system, pre-processing device include loading machine, crusher, conveying equipment, vibrating screen and apparatus for feeding, Eddy flow dissolves the hot-blast stove that poly- upgrading system includes drying machine and provides high-temperature flue gas for drying machine, and sub-prime classifying equipoment includes one Grade flue gas sorting separator, secondary smoke sorting separator, three-level separator;Loading machine is that crusher transports lignite, crusher It is connect with conveying equipment, conveying equipment is connect with vibrating screen, and vibrating screen is connect with apparatus for feeding, and apparatus for feeding closes wind by charging Valve is connect with drying machine, and drying machine is connect with hot-blast stove by hot blast pipe, and drying machine connects level-one flue gas by flow-disturbing valve and sorts Separator, the brown coal powder after drying and upgrading enter level-one flue gas with high-temperature flue gas and sort separator, the sorting point of level-one flue gas Secondary smoke is connected by hot blast pipe from device and sorts separator, secondary smoke sorts separator and connects three-level separation by hot blast pipe Device, secondary smoke sorting separator and three-level separator are separately connected air-transport system, and air-transport system connects finished bin.
Preferably, crusher includes level-one crusher, secondary breaker and tertiary crusher, and vibrating screen includes primary vibration Sieve and secondary vibration sieve, level-one crusher are sieved with primary vibration and are connect by conveying equipment, the thick lignite that primary vibration sieves It is transported to secondary breaker by conveying equipment, the lignite for the setting grain size that primary vibration sieves is transported to by conveying equipment Apparatus for feeding, secondary breaker are connected by conveying equipment and secondary vibration sieve, and the thick lignite that secondary vibration is sieved passes through defeated Equipment is sent to be transported to tertiary crusher, the lignite for the setting grain size that secondary vibration is sieved is transported to charging by conveying equipment and sets Standby, tertiary crusher is connect with apparatus for feeding.
Preferably, level-one crusher is the jaw crusher of 80mm, and secondary breaker is the rod-toothed crusher of 30mm, three-level Crusher is the double-roll crusher of 3mm, and primary vibration sieve and secondary vibration sieve are the vibrating screening machines of 3mm;Conveying equipment is Scrapper conveyor or belt conveyor, apparatus for feeding are charging scrapper conveyors.
Preferably, level-one flue gas sorting separator is cyclone dust collectors, and it is cyclone dust collectors that secondary smoke, which sorts separator, Three-level separator is bag filter.
Preferably, upgrading device further includes finished product caching system, finished product packing system, clean-production system, water system And air supply system;Drying machine includes one chamber of drying machine, two chamber of drying machine and three chambers, and sub-material scrapper conveyor will be crushed and screen Lignite from one chamber of drying machine enter.
Preferably, upgrading system further includes air-introduced machine and outer smoke evacuation chimney, and air-introduced machine connects three-level separator and generates negative pressure, draws Wind turbine connects outer smoke evacuation chimney.
Preferably, upgrading system further include finished product summarizes scraper plate, finished product reprints scraper plate, loading machine, coal-fired charging scrapper conveyor, Coal-fired sub-material scrapper conveyor, electric gate valve, coal-fired surge bunker and the vibrating screen being connect with level-one flue gas sorting separator, vibrating screen are logical It crosses finished product and summarizes scraper plate and finished product and reprint scraper plate and connect with loading machine, loading machine passes through loading machine fire coal charging scrapper conveyor and fire coal Sub-material scrapper conveyor is connect with coal-fired surge bunker, and coal-fired surge bunker is connect with hot-blast stove, coal-fired sub-material scrapper conveyor and coal-fired surge bunker Between be provided with electric gate valve.
Preferably, upgrading system includes combustion fan, mucking machine, slags tap and belt and slag tap and reprint belt, and combustion fan sets It sets on the side of hot-blast stove, the oxygen of burning is provided for hot-blast stove, hot-blast stove is connect with mucking machine, and mucking machine is by going out slag crust Band with slag tap reprint belt connect, transport device will slag tap reprint belt at slag charge be transported to cinder brick field utilization;
Upgrading system includes bypath system, and bypath system includes bypass gate valve, dust collector of water curtain, air-introduced machine and bypass cigarette Chimney, the hot blast pipe bypassed between gate valve and hot-blast stove and drying machine connect, and bypass gate valve is connect with dust collector of water curtain, and water curtain removes Dirt device is connect with air-introduced machine, and the flue gas after dust collector of water curtain dedusting is discharged through chimney bypass.
The present invention also provides a kind of efficient method for upgrading of lignite of sub-prime classification, and lignite raw material is after crusher in crushing It is transported to vibrating screen through scrapper conveyor, Vibration Screen selects the powdery brown coal of setting grain size, and the high-temperature flue gas that hot-blast stove generates is drawing Synchronous with pretreated powdery brown coal under the action of wind negative pressure to enter drying machine, powdery brown coal is in drying machine by high speed depolymerization Disperse simultaneously to be in direct contact with high-temperature flue gas and carry out efficient mass heat transfer, by the lignite after dry depolymerization under the action of negative pressure with High-temperature flue gas is discharged from drying machine, obtains the big three-level product of granularity into level-one flue gas sorting separator, is entrained in air-flow In brown coal powder with air-flow go successively to secondary smoke sort separator, through slow down sedimentation obtain first class product, granularity is smaller Brown coal powder obtains secondary product after the separation of three-level separator, and by sub-prime classification, treated that level-one is produced respectively for air-transport system Product and secondary product are transported to finished bin.
Preferably, lignite raw material is admitted to drying machine, the powdery that Vibration Screen is selected again after multiple stage crushing and screening The grain size of lignite is 3mm or less;Oxygen content in drying machine<3%, negative pressure is the import temperature of -500~-800Pa, high-temperature flue gas Degree is 900-1600 DEG C, the outlet temperature of high-temperature flue gas is 150-180 DEG C.
Explanation of nouns:
Depolymerization:Coal is broken for short grained process by bulky grain.
Mass heat transfer:Mutual heat conduction, the process of mass change will be hot specific to high temperature flue gas of the present invention Amount is transmitted to coal, and coal is made to heat up, simultaneous moisture evaporation, the process that coal is dried.
The implementation of the present invention includes following technique effect:
The efficient upgrading system of lignite of the sub-prime classification of the present invention by crusher and vibrating screen by lignite feedstock processing at The lignite original powder of granularity is set, then the eddy flow that enters synchronous with high-temperature flue gas dissolves poly- upgrading system, by high speed depolymerization in system Disperse and be in direct contact with heat smoke to carry out efficient mass heat transfer, be discharged with high-temperature flue gas after rapid draing.It needs to illustrate Be in such a way that the brown coal powder after drying and upgrading is discharged with high-temperature flue gas, if lignite be not depolymerizated it is certain The brown coal powder of grain size or certain moisture, then the negative pressure set will not be able to take out of in lignite, bulky grain lignite and high-moisture Lignite continuation is depolymerizated and dries in drying chamber, and the dehydration rate for increasing lignite is arranged such and reduces dewatered grain size, energy The low brown coal powder of uniform particle sizes, moisture is accessed, one for the present invention big improves.The present invention is sorted by the way that level-one flue gas is arranged The brown coal powder sub-prime after drying is classified from device, secondary smoke sorting separator and three-level separator, is sorted by hot wind, product Moisture is low, granularity is small, calorific value is high for the first class product (product that secondary smoke sorting separator obtains) that classification sub-prime is selected Fine work is sold to the industry users such as thermoelectricity, steel, cement as high-efficiency pulverized coal;Secondary product (product that bag filter obtains) The product that moisture is low, fine size, lignite wax and humic acid are high be supplied to downstream deep processing;(level-one flue gas sorts three-level product The product that separator obtains) ash content is high, granularity is big, calorific value is low part is as hot-blast stove fuel.The sub-prime point of the present invention The efficient upgrading system of lignite and its method for upgrading of grade, by the high three-level product of ash content, (level-one flue gas sorting separator obtains Product) it is directly used as hot-blast stove fuel, the slag charge after burning can be transported to brick field utilization.Moisture is low, granularity is small, calorific value is high Fine work be sold to the industry users such as thermoelectricity, steel, cement as high-efficiency pulverized coal, reduce transportation cost.Lignite wax and rotten plant The high product of sour high-content is supplied to downstream deep processing enterprise, has been truly realized the utilization in all directions of lignite, has greatly reduced brown The cost of coal upgrading, is particularly suitable for commercial introduction.
The efficient upgrading system operating index of lignite of this project sub-prime of the present invention classification is:40 water can averagely be removed Branch, 20 ton hour of single machine production capacity, year accumulative operation 24 hours × 330 days, 150,000 tons/year of production capacity, project aggregated capacity 300,000 Ton/year.The system is after industrialization with verification, and safety, the feature of environmental protection, economy are obtained for long-term verification, the three generations System can remove 40 or more point of moisture, be dehydrated while reducing ash content without losing volatile matter, broken through internationally recognized " external Shipwreck purifies, inherent shipwreck abjection " technical bottleneck, be in the leading level in the world.
The lignite upgrading system of the present invention is sealed by overall process and is conveyed, product sealed storage, and downstream slitless connection, Realize clean manufacturing.
Description of the drawings
Fig. 1 is a kind of efficient upgrading system frame diagram of lignite of sub-prime classification of the present invention.
Fig. 2 is that schematic diagram is arranged in a kind of equipment of the efficient upgrading system of lignite of sub-prime classification of the present invention.
Fig. 3 is that schematic diagram is arranged in the equipment for the efficient upgrading system of lignite that a kind of sub-prime of the embodiment of the present invention 1 is classified.
Fig. 4 is that schematic diagram is arranged in the equipment for the efficient upgrading system of lignite that a kind of sub-prime of the embodiment of the present invention 2 is classified.
Specific implementation mode
The present invention is described in detail below in conjunction with embodiment and attached drawing, it should be pointed out that described reality It applies example and is intended merely to facilitate the understanding of the present invention, and do not play any restriction effect to it.
It should be noted that the term " front/back " being likely to occur in the description of the present invention, " up/down ", " it is left/ The orientation or positional relationship of the instructions such as the right side ", " vertical/horizontal ", " inside/outside " is to be based on the orientation or positional relationship shown in the drawings, Be merely for convenience of description of the present invention and simplification of the description, do not indicate or imply the indicated device or element must have it is specific Orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second ", " third ", " level-one ", " two level ", " three-level " are used for description purposes only, and are not understood to indicate or imply relatively heavy The property wanted.For sake of convenience, hereinafter so-called " left side " " right side " "upper" "lower" and the left and right of attached drawing itself, upper and lower to consistent, But restriction effect is not played to the structure of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected;It can Can also be electrical connection to be mechanical connection;It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.
Shown in Fig. 1 to Fig. 2, a kind of efficient upgrading system of lignite of sub-prime classification provided in this embodiment, including it is pre- Processing equipment, eddy flow dissolve poly- upgrading system, sub-prime classifying equipoment and air-transport system, pre-processing device include loading machine, Crusher, conveying equipment, vibrating screen and apparatus for feeding, eddy flow dissolve poly- upgrading system and include drying machine and provide height for drying machine The hot-blast stove of warm flue gas, sub-prime classifying equipoment include level-one flue gas sorting separator, secondary smoke sorting separator, three-level separation Device;Loading machine is that crusher transports lignite, and crusher connect with conveying equipment, and conveying equipment is connect with vibrating screen, vibrating screen and Apparatus for feeding connects, and apparatus for feeding closes air-valve by charging and connect with drying machine, and drying machine is connect with hot-blast stove by hot blast pipe, Drying machine connects level-one flue gas by flow-disturbing valve and sorts separator, and level-one flue gas sorts separator and connects two level cigarette by hot blast pipe Qi leel selects separator, and secondary smoke sorts separator and connects three-level separator by hot blast pipe, secondary smoke sort separator and Three-level separator is separately connected air-transport system, and air-transport system connects finished bin.In the present embodiment, drying device includes Driving device, rack, casing, lifting tooth and drive shaft;Driving device and casing are arranged in rack, and casing and rack are constituted and done The cavity of dry device, driving device and driving axis connection, are provided with lifting tooth in drive shaft;It is provided with air inlet on casing, enters Material mouth and air outlet.The cavity of drying device is divided into multiple chambers that striker plate by being staggered and wind shield are divided into, and makes It is S-shaped that high-temperature flue gas, which is obtained, with the trend of lignite in the chamber, and mass heat transfer is abundant, and the thermal efficiency improves.Lignite after drying is whole It is taken away with high-temperature flue gas, separator is sorted into level-one flue gas.
Shown in Figure 2, crusher includes level-one crusher, secondary breaker and tertiary crusher, and vibrating screen includes one Grade vibrating screen and secondary vibration sieve, level-one crusher are sieved with primary vibration and are connect by conveying equipment, what primary vibration sieved Thick lignite is transported to secondary breaker by conveying equipment, and the lignite for the setting grain size that primary vibration sieves passes through conveying equipment It is transported to apparatus for feeding, secondary breaker is connected by conveying equipment and secondary vibration sieve, the thick lignite that secondary vibration is sieved It is transported to tertiary crusher by conveying equipment, the lignite for the setting grain size that secondary vibration is sieved is transported to by conveying equipment Apparatus for feeding, tertiary crusher are connect with apparatus for feeding.
Preferably, level-one crusher is the jaw crusher of 80mm, and secondary breaker is the rod-toothed crusher of 30mm, three-level Crusher is the double-roll crusher of 3mm, and primary vibration sieve and secondary vibration sieve are the vibrating screening machines of 3mm;Conveying equipment is Scrapper conveyor or belt conveyor, apparatus for feeding are charging scrapper conveyors.Lignite raw material is first sent into raw material storage and is kept in, then in batches by loading machine Secondary to be transported to feeding port, being uniformly sent into system after three-level is broken and two-stage screening process through oscillating feeder becomes 3mm or less The material of grain size waits for production and processing into pretreatment buffering chamber.It is cyclone dust collectors, two level cigarette that level-one flue gas, which sorts separator, It is cyclone dust collectors that qi leel, which selects separator, and three-level separator is bag filter.
Shown in Figure 3, upgrading system further includes air-introduced machine and outer smoke evacuation chimney, and it is negative that air-introduced machine connects the generation of three-level separator Pressure, air-introduced machine connect outer smoke evacuation chimney.Upgrading system further includes that finished product summarizes scraper plate, finished product reprints scraper plate, loading machine, fire coal are fed Scrapper conveyor, coal-fired sub-material scrapper conveyor, electric gate valve, coal-fired surge bunker and the vibrating screen being connect with level-one flue gas sorting separator, Vibrating screen summarizes scraper plate by finished product and finished product is reprinted scraper plate and connect with loading machine, and loading machine feeds scraper plate by loading machine fire coal Machine and coal-fired sub-material scrapper conveyor are connect with coal-fired surge bunker, and coal-fired surge bunker is connect with hot-blast stove, coal-fired sub-material scrapper conveyor and combustion It is provided with electric gate valve between coal surge bunker.
Upgrading system includes combustion fan, mucking machine, belt of slagging tap, slags tap and reprint belt, and combustion fan is arranged in hot wind The side of stove provides the oxygen of burning for hot-blast stove, and hot-blast stove is connect with mucking machine, mucking machine by slag tap belt with slag tap Reprint belt connection, transport device will slag tap reprint belt at slag charge be transported to cinder brick field utilization.Upgrading system includes side Road system, bypath system include bypass gate valve, dust collector of water curtain, air-introduced machine, chimney bypass, bypass gate valve and hot-blast stove and do Hot blast pipe connection between dry machine, bypass gate valve are connect with dust collector of water curtain, and dust collector of water curtain is connect with air-introduced machine, through water Flue gas after curtain dust-extraction unit dedusting is discharged through chimney bypass.
Shown in Figure 2, the present embodiment additionally provides a kind of method of lignite upgrading, lignite raw material through crusher in crushing it It is transported to vibrating screen by scrapper conveyor, Vibration Screen selects the powdery brown coal of setting grain size, and the high-temperature flue gas that hot-blast stove generates exists Synchronous with pretreated powdery brown coal under the action of induced air negative-pressure to enter drying machine, powdery brown coal is solved at a high speed in drying machine Poly- dispersion, which is simultaneously in direct contact with high-temperature flue gas, carries out efficient mass heat transfer, by the lignite after dry depolymerization under the action of negative pressure with It high-temperature flue gas to be discharged from drying machine, obtains the big three-level product of granularity into level-one flue gas sorting separator, be entrained in gas Brown coal powder in stream goes successively to secondary smoke with air-flow and sorts separator, and through slowing down, sedimentation obtains first class product, granularity smaller Brown coal powder obtain secondary product after the separation of three-level separator, air-transport system is respectively by sub-prime classification treated level-one Product and secondary product are transported to finished bin.The principle of flue gas separation system is that proportion is small, water content is low, the small thin lignite of particle Powder is taken away under certain condition of negative pressure by hot wind, and phosphorus content is high, than great, water content is low, particle sinks to the bottom greatly separation.It is preferred that Ground, lignite raw material are admitted to drying machine again after multiple stage crushing and screening, and the grain size for the powdery brown coal that Vibration Screen is selected is 3mm or less.Oxygen content in drying machine<3%, negative pressure is -500~-800Pa, the inlet temperature of high-temperature flue gas is 900-1600 DEG C, the outlet temperature of high-temperature flue gas be 150-180 DEG C.
The low-value fuel (three-level product) sorted through upgrading is mixed in proportion is made coal-fired feeding hot wind with quick lime (desulfurization) Stove coal bunker is temporary, and fire grate is moved back and forth uniformly is routed on fire grate and is sent into hearth combustion by fire coal, by adjusting air blast wind Throttle opening is measured and matched, so that fire coal low oxygen combustion (control NO_x formation) on fire grate is generated high-temperature flue gas afterwards, then through only It is synchronous with pretreated material under the action of induced air negative-pressure that change technical finesse (control flying dust) obtains clean high-temperature flue gas Into drying machine, by high speed depolymerization disperseed and be in direct contact with heat smoke in system to carry out efficient mass heat transfer, hypoxemia (< 3%) it, is exported after rapid draing in the environment of negative pressure (- 500~-800Pa), product is also ensured while ensureing dehydration efficiency Quality.Product after drying is sent into sub-prime hierarchy system.The clinker that Combustion of Hot Air Furnace generates is the good material of environment-friendly building materials, is supplied It should be recycled to downstream building materials enterprise, it is economic and environment-friendly.
Oxygen content, temperature, negative pressure are all made of PID automatic adjustments in system, and quality assurance is balanced, when temperature over-range, is It is safe that emergence programs, the safeguards systems such as bypass emptying, the isolation of flow-disturbing valve, main shaft cooling are shut down and started to system meeting automatic alarm.
The system is after industrialization with verification, and safety, the feature of environmental protection, economy are obtained for long-term verification, this three 40 or more point of moisture can be removed for system, be dehydrated while reducing ash content without losing volatile matter, have been broken through internationally recognized " outer Purify in shipwreck, interior deviate from shipwreck " technical bottleneck, be in the leading level in the world.
In the present embodiment, the design parameter (single machine) that eddy flow dissolves poly- upgrading system is:It is coal-fired:3.2t/h, water separation capability: 40 point of moisture, production capacity:20t/h, 150,000 tons/year.
Sub-prime hierarchy system is to produce the material after drying and upgrading at different brackets according to different ingredient and quality sorting The process of product, by level-one flue gas sorting separator, secondary smoke sorting separator, bag filter, air-introduced machine, water-cooling system, The compositions such as secondary bypass, second-disturbing flow valve, vibrating screening machine, fine work temporary storing bin, coal-fired temporary storing bin, drag conveyor.
Product after drying and upgrading enters sub-prime hierarchy system under the action of induced air negative-pressure, sorts and detaches through level-one flue gas Device detaches, and the product of the above grain sizes of grain size 1mm is discharged from separator bottom;Grain size 1mm products below enter secondary with air-flow Separator is settled through slowing down, and the material of grain size 0.1mm-1mm is discharged from secondary smoke sorting separator;The smaller product of granularity Enter bag filter with air-flow, is discharged from bag filter bottom discharge mouth after Bag filter, sedimentation, through bag filter Filtering, front end are mixed the tail gas up to standard after burning quick lime desulfurization, low oxygen combustion denitrogenation processing and are discharged from chimney.A separator detaches Product be delivered to the apertures 1mm screening machine screening process through scrapper conveyor, lower part of screen is sent to fine work temporary storing bin, the dispensing of sieve top To coal-fired temporary storing bin.The merely illustrative example of effect of data exemplified by the present embodiment, skilled person is according to required material ratio The needs of weight and grain size, can adjust negative pressure value and be screened.
The product that fine work temporary storing bin product is detached with second separator is delivered to finished bin by air-transport system, is made First class product, moisture is low, granularity is small, calorific value is high, and the use of the industries such as thermoelectricity, steel, cement is sold to as high-efficiency pulverized coal Family;
Secondary product is made after being delivered to packaging system packaging by air-transport system in the product that bag filter is collected, Its moisture is low, fine size, lignite wax and humic acid are high, supplies downstream deep processing;
The product of coal-fired temporary storing bin is three-level product, and ash content is high, granularity is big, calorific value is low, mixes and combustion is made with quick lime Expect the burning of heat supply wind furnace.
Embodiment 1
It is shown in Figure 3, the efficient upgrading system of lignite of sub-prime classification provided in this embodiment, including pre-processing device, Eddy flow dissolves poly- upgrading system, sub-prime classifying equipoment and air-transport system.
Pre-processing device is the equipment that lignite raw coal is processed into the material that can be directly entered the processing of drying and upgrading system. Pre-processing device includes loading machine, 1# batchers, level-one crusher (jaw crusher 80mm), 1# scrapper conveyors, 1#, 2# vibration Sieve;1# belt feeders, 2# belt feeders, secondary breaker (rod-toothed crusher 30mm), 3# scrapper conveyors, 3# vibrating screens, 4# scrapper conveyors, 5# scrapper conveyors, three crushers (double-roll crusher 3mm), 6# scrapper conveyors, 1# lignite surge bunker, 2# lignite surge bunker, 8# scraper plates Machine, 1# chargings scrapper conveyor, 1# feeding air-locked valves;2# scrapper conveyors, 3# lignite surge bunker, 7# scrapper conveyors, sub-material scrapper conveyor, 2# chargings Scrapper conveyor, 2# feeding air-locked valves;Lignite raw material is transported to 1# batchers (preferably oscillating feeder) feeding port by loading machine, warp 1# batchers are connect with level-one crusher, and the lignite after level-one crusher in crushing is transported to 1#, 2# vibrating screen by 1# scrapper conveyors, The thin brown coal powder that 1#, 2# Vibration Screen are selected is transported to 3# lignite surge bunkers through 2# scrapper conveyors, the outlet of 3# lignite surge bunkers with 7# scrapper conveyors connect.The thick lignite that 1#, 2# Vibration Screen are selected is transmitted to secondary breaker by 1# belt feeders and 2# belt feeders, The broken lignite of secondary breaker is transported to 3# vibrating screens by 3# scrapper conveyors, and the thick lignite that 3# Vibration Screens are selected passes through 5# Scrapper conveyor, which is transported to tertiary crusher, to be continued to be crushed, by the thin brown coal powder that 3# Vibration Screens are selected after 4# scrapper conveyors with three The outlet connection of grade crusher, the broken thin brown coal powder of thin brown coal powder and tertiary crusher that 3# Vibration Screens are selected converge It is transported to 1# lignite surge bunker and 2# lignite surge bunkers, the outlet of 1# lignite surge bunkers and going out for 7# scrapper conveyors by 6# scrapper conveyors Mouth connection, the input through sub-material scrapper conveyor after the thin brown coal powder of 1# lignite surge bunkers converges with the thin brown coal powder of 3# lignite surge bunkers Scrapper conveyor is fed into 2#, 2# charging scrapper conveyors are connect with 2# feeding air-locked valves, and 2# feeding air-locked valves are connect with 2# drying machines. Brown coal powder in 2# lignite surge bunkers delivers into 1# charging scrapper conveyors through 8# scrapper conveyors, and 1# feeds scrapper conveyor and fed with 1# Wind stopping device connects, and 1# feeding air-locked valves are connect with 1# drying machines.Sub-material scrapper conveyor is connect with 1# charging scrapper conveyors, sub-material scrapper conveyor Setting so that thin brown coal powder can reasonable distribution, provide brown coal powder for two drying machines.
It is the process for processing pretreated material upgrading that eddy flow, which dissolves poly- upgrading system, by hot-blast stove and drying machine two Big host equipment composition, is also equipped with bypath system.
It includes 1# drying machines, 1# flow-disturbings valve, 1#1 grades of cyclone dust collectors, 1# vibrating screens, finished product that eddy flow, which dissolves poly- upgrading system, Summarize scraper plate, finished product reprints scraper plate, loading machine, coal-fired charging scrapper conveyor, coal-fired sub-material scrapper conveyor, 1# electric gate valves, 1# fire coals Surge bunker, 1# hot-blast stoves;Sub-prime classifying equipoment includes 1#2 grades of cyclone dust collectors, 1# bag filters, air-transport system, 1# Air-introduced machine, 1# outer smoke evacuation chimney, finished bin;1# combustion fans, 1# mucking machines, 1# slag tap belt, slag tap reprint belt, clinker brick Factory;It is connected using hot blast pipe between 1# hot-blast stoves and 1# drying machines, 1# combustion fans are arranged on the side of 1# hot-blast stoves, are 1# heat Wind furnace provides the oxygen of burning, and 1# hot-blast stoves connect with 1# mucking machines, and 1# mucking machines are slagged tap belt and reprinting of slagging tap by 1# Belt connect, transport device will slag tap reprint belt at slag charge be transported to cinder brick field utilization.1# drying machines pass through 1# flow-disturbings Valve is connect with 1#1 grades of cyclone dust collectors, and the lignite after depolymerization is dried in 1# drying machines under the action of negative pressure with high temperature Flue gas is discharged from drying machine, by entering 1#1 grades of cyclone dust collectors after 1# flow-disturbing valves, after 1#1 grades of cyclone dust collectors detach The big first class product of granularity is obtained, the brown coal powder carried secretly in the gas flow goes successively to 1#2 grades of cyclone dust collectors with air-flow, through slowing down Sedimentation obtains secondary product, and the smaller brown coal powder of granularity obtains three-level product, Geldart-D particle system after the separation of 1# bag filters Sub-prime classification treated secondary product and three-level product are transported to finished bin by system.1# bag filters connect with 1# air-introduced machines It connects, finally the gas after dedusting is discharged through smoke evacuation chimney outside 1#.1#1 grades of cyclone dust collectors are connect with 1# vibrating screens, 1# vibrating screens Summarize scraper plate by finished product and finished product is reprinted scraper plate and connect with loading machine, loading machine feeds scrapper conveyor and combustion by loading machine fire coal Coal sub-material scrapper conveyor is connect with 1# fire coal surge bunkers, and 1# fire coals surge bunker is connect with 1# hot-blast stoves, coal-fired sub-material scrapper conveyor and 1# 1# electric gate valves are provided between coal-fired surge bunker.The first class product obtained after 1#1 grades of cyclone dust collectors separation is vibrated by 1# The coal dust of the screening of sieve, small particle is transported to finished bin by air-transport system;Large-sized coal dust summarizes by finished product to be scraped What plate and finished product reprinted scraper plate is conveyed into loading machine, is then transmitted after fire coal charging scrapper conveyor and coal-fired sub-material scrapper conveyor To 1# fire coal surge bunkers, as hot-blast stove fuel.
Bypath system includes 1# bypasses gate valve, 1# dust collector of water curtain, 1# air-introduced machines, 1# chimney bypass, and 1# bypasses gate valve Hot blast pipe between 1# hot-blast stoves and 1# drying machines is connect, and 1# bypass gate valves are connect with 1# dust collector of water curtain, and 1# water curtains remove Dirt device is connect with 1# air-introduced machines, and the flue gas after 1# dust collector of water curtain dedustings is discharged through 1# chimney bypass.
It further includes 2# drying machines that eddy flow, which dissolves poly- upgrading system, is participated in shown in Fig. 3, and the equipment connection in 2# drying machines downstream is same On, it repeats no more.
The product that fine work temporary storing bin product is detached with second separator is delivered to finished bin by air-transport system, is made First class product, moisture is low, granularity is small, calorific value is high, and the use of the industries such as thermoelectricity, steel, cement is sold to as high-efficiency pulverized coal Family;
Secondary product is made after being delivered to packaging system packaging by air-transport system in the product that bag filter is collected, Its moisture is low, fine size, lignite wax and humic acid are high, supplies downstream deep processing;
The product of coal-fired temporary storing bin is three-level product, and ash content is high, granularity is big, calorific value is low, mixes and combustion is made with quick lime Expect the burning of heat supply wind furnace.
The three-level product that the equipment of the present embodiment obtains, the parameter after chemical examination are:
First class product (product that secondary smoke sorting separator obtains):Moisture low (4-10%), the small (0.1- of granularity 1mm), calorific value is high (4400-4800kcal/kg);
Secondary product (product that bag filter obtains):Moisture low (8-12%), fine size (<0.1mm), organic matter, Humic acid content is high;
Three-level product (product that level-one flue gas sorting separator obtains):Moisture height (17-20%), granularity it is big (>1mm)、 Calorific value is low (3200-3500kcal/kg).
The design parameter of air-transport system is:Conveying capacity:72t/h, air source:4.5bar compressed airs, 80m3/ Min, material-gas ratio:70%, Condensed transportation.
Air-transport system is by sub-prime classification treated process that material is transported to finished bin, by compressed air gas Source, conveyance conduit, helps and blows the compositions such as valve storehouse pump, and storehouse pump includes the pump housing, inlet valve, air bleeding valve, intake valve, fluidizing valve, discharging The components such as valve, pressure detecting, material-level measure.By 20 8 groups of storehouse pumps point respectively by fine work temporary storing bin, secondary smoke sorting separation Device, bag filter product be delivered to finished bin.Transmission process is controlled by PLC program, and a transport cycle is:Storehouse pump charging Valve and exhaust valve opening loaded material, when material reaches high charge level or charging timing arrival, inlet valve and air bleeding valve into the pump that puts in storage It closes, opens intake valve, outlet valve and help and blow valve conveying material.With the raising of storehouse pump gas pressure, material and compressed air press one Certainty ratio mixing is blown from along conveyance conduit to finished bin.As storehouse pump material has been sent, air pressure can be gradually reduced, and work as pressure Less than the empty setting value of material, then start blowpipe, timing, which reaches to return to, expects that one transport cycle of dummy status terminates, and automatically begins to next A transport cycle.
Multigroup storehouse pump takes timesharing to avoid the peak hour mode of movement, ensures that gas consumption is balanced, automatic monitoring bin-level, material It is all automatically stopped conveying cycle after conveying, avoids wasting, achieve the purpose that energy-saving.
Upgrading device further includes caching product in case transporting or the finished product caching system of packaging, finished product packing system, clear Clean production system, water system, air supply system.
Finished product caching system be by product cache in case transport or packaging process, by finished bin, bulk machine, bag-type dust The parts such as device, moisture-eliminating blower, explosion proof door, temperature detection, nitrogen injection protection system, spraying system of fire fighting form.Geldart-D particle into Entering the gas material mixture of finished bin, natural subsidence, extra air and vapor are filtered by bag filter under the effect of gravity Outside through moisture-eliminating blower discharge storehouse, product is avoided to get damp again, while ensureing the environment in hypoxemia, negative pressure in storehouse, prevents Fire explosion. The multiple temperature detecting points of system configuration monitor product temperature in storehouse in real time, if temperature over-range, are automatically injected nitrogen protection, if There is nature or open fire, starts fire-fighting spraying automatically.Bin bottom discharge port installs bulk machine, the directly tank car with transport product Slitless connection is simultaneously dusted, and prevents from causing dust pollution in entrucking and transportational process.
Finished product packing system is the process that the secondary product transported for long-distance will be needed to carry out packing storage with jumbo bag, by finished product The part such as storehouse star-shaped feeding machine, spiral cooling conveyer, comminutor, ton chartered plane forms.100m3The product of finished bin storage is through going out Star-shaped feeding machine even feeding is expected to level Four spiral cooling conveyer, and after outer wall cooling water cools being delivered to comminutor stirs Enter packing machine surge bunker after mixing, packing machine is weighed after dress wraps and is transported into transfer point, then with fork truck by cart transport automatically Product library is temporary to wait for concentrated loading.It is packed using jumbo bag, prevents the airborne dust in transportational process and oxidation nature scene, ensure Environmental protection and safety, jumbo bag recycling are economic and environment-friendly.
Clean-production system is used to collect each process procedure in processing workshop and runs the flue gas emitted, airborne dust dust, entrainment dust Vapor, keep clean manufacturing.The system is by screen collector, bag filter, air-introduced machine, water system, air hose, wind The compositions such as valve, wind pressure detection.In production process, hot-blast stove, drying machine have heat smoke race and emit, and are fed again into after system is collected Combustion of Hot Air Furnace reduces thermal loss, energy saving;Each equipment transfer point, loading station have airborne dust, and bag-type dust is arranged in system Device gathers dust on the spot, and airborne dust is avoided to pollute workshop condition;Cooling of furnace slag and pipe cooling generate the water of a large amount of entrainment dust Steam carries out vapor recycling and dust-filtering using water curtain dedusting, water resource is recycled, energy conservation and environmental protection.
Water system be to each process point cooling water supply of production line, recirculated water, fire water, and by return water carry out it is cooling, The process of filtration treatment.It is divided into two parts of recirculated cooling water and concentrating and precipitating water.Recirculating cooling water system is by blower cooling water Case, back pool, cooling bay, send pond, pipeline pump 2, submerged pump 10, fire pump 2, constant pressure water supply system are a set of, supply 7 groups of water lines, 2 groups of water return pipeline, the compositions such as pond cooling tower one, cooling water pump 3 and water-level gauge, thermometer.Concentration Precipitation water system by return water sedimentation basin, concentration basin, filter wall, send pond, dredge pump hole, water supply pump 4, dredge pump one, confession The compositions such as 2 groups of water lines, 1 group of blowoff line, 1 group of water return pipeline and water-level gauge, thermometer.
Blower cooling water is used to produce the bearing block cooling of air-introduced machine and environmental dust removal air-introduced machine;Recirculated cooling water is for giving birth to The cooling of producing line second separator and front and back air hose, dry motor spindle, main shaft, packaging system spiral;Fire water is for full factory Fire-fighting guarantee;Concentrating and precipitating water supplies water for workshop dedusting, bypass water curtain dedusting.
All water supply pumps of system are all made of the using and the reserved, the control model that failure is hauled oneself willingly into, according to water level in water pool and temperature, from Dynamic start and stop cooling tower water pump and water supply valve, ensure that the coolant-temperature gage, flow, pressure confessed are constant.Water system and water system Interlocked control, when stopping water, the automatic frequency reducing of water system or stopping avoid wasting.
Air supply system is to each process point of production line supply compressed air, the process of nitrogen, and system is divided into compressed air system System and nitrogen system two parts.Compressed air system is by air compressor machine, cooling driers, filter, air accumulator, supply air line and decompression The part such as valve, pressure detecting is constituted;Nitrogen system is by compressed air gas source, nitrogen making machine, gas exhaust piping and muffler, storage nitrogen The part such as tank, supply air line and pressure reducing valve, pressure detecting is constituted.
The compressed air that air compressor machine generates is sent into air accumulator storage after cooling driers drying and dehydrating, in case Geldart-D particle system The gas equipments such as system, packing machine and operated pneumatic valve, air bubble and nitrogen making machine use.Nitrogen making machine uses compressed air for raw material, By nitrogen and oxygen separation, for oxygen by being arranged outside gas exhaust piping, nitrogen is sent into air accumulator storage in case bag filter blowback, finished product Storehouse and deduster note nitrogen protection use.
Air compressor machine is automatically adjusted using dual-purpose one standby configuration using PID, ensures that supply gas pressure is constant and energy-saving. Air supply system is controlled with gas system interlock, and when stopping gas, the automatic frequency reducing of air compressor machine or stopping, avoiding wasting.
Embodiment 2
It is shown in Figure 4, present embodiments provide the efficient upgrading system of lignite of another sub-prime classification, the present embodiment it is brown Coal upgrading upgrading system includes pre-processing device, the poly- upgrading system of eddy flow neutralizing, sub-prime classifying equipoment and air-transport system.This The difference of embodiment and embodiment 1 is pre-processing device, and other parts are same as Example 1, portion same as Example 1 Point, this embodiment is not repeated.
Shown in Figure 4, pre-processing device includes 1# processing lines and 2# processing lines, and 2# processing lines include loading machine, feed Machine, level-one crusher, 1# scrapper conveyors, 2# vibrating screens, 1# vibrating screens, 9# scrapper conveyors, plain-barreled roll crusher, 10# scrapper conveyors, 2# scraper plates Machine, 2# electric gate valves, 3# lignite surge bunker, 7# scrapper conveyors, sub-material scrapper conveyor, hand door, 2# chargings scrapper conveyor, 2# chargings are closed Wind device, granularity 0-500mm, moisture are that the lignite raw material of 50%-53% is conveyed to batcher, granularity 0- by elevating conveyor The lignite of 3mm enters directly into 1# scrapper conveyors, the lignite that the lignite of big granularity passes through and crusher in crushing is 0-100mm, 1# Scrapper conveyor is connect with 1# vibrating screens and 2# vibrating screens respectively, is provided with out between 1# scrapper conveyors and 1# vibrating screens and 2# vibrating screens It closes, 1# vibrating screens by 9# scrapper conveyors and plain-barreled roll crusher, select the lignite that granularity is 3-100mm and be transported to by 1# Vibration Screens 9# scrapper conveyors, plain-barreled roll crusher are connect by 10# scrapper conveyors with 2# scrapper conveyors, 1# vibrating screens and 2# vibrating screens respectively with 2# scraper plates Machine connects, and for the lignite of the 0-3mm after screening to be transported to 2# scrapper conveyors, 2# scrapper conveyors are connect with 3# lignite surge bunkers, 2# 2# electric gate valves are provided between scrapper conveyor and 3# lignite surge bunkers, 3# lignite surge bunker passes through 7# scrapper conveyors and sub-material scraper plate Machine connects, and sub-material scrapper conveyor and 2# charging scrapper conveyor connects, sub-material scrapper conveyor and 2# feed scrapper conveyor and 1# feed scrapper conveyor it Between be provided with hand door, manual switch is fed for controlling, and 2# charging scrapper conveyors are connect with 2# feeding air-locked valves.
1# processing line include 1# belt feeders, 2# belt feeders, secondary breaker, 3# scrapper conveyors, 3# vibrating screens, 4# scrapper conveyors, 5# scrapper conveyors, tertiary crusher, 6# scrapper conveyors, 6# scrapper conveyors, 3# electric gate valves, 2# lignite surge bunker, 1# lignite surge bunker, 8# Scrapper conveyor, 1# chargings scrapper conveyor, 1# feeding air-locked valves, the granularity that 2# Vibration Screens are selected are that the lignite of 3-100mm passes through 1# skins Band machine and 2# belt feeders are transmitted to secondary breaker, and secondary breaker is connect by 3# scrapper conveyors with 3# vibrating screens, 3# vibrating screens It being connect with 6# scrapper conveyors, the lignite for transmitting granularity 0-3mm, 3# vibrating screens are connect by 5# scrapper conveyors with tertiary crusher, Lignite for transmitting granularity 0-30mm, tertiary crusher are connect with 6# scrapper conveyors, 6# scrapper conveyors respectively with 2# lignite surge bunkers It is connected with 1# lignite surge bunkers, 2# lignite surge bunker is connect with sub-material scrapper conveyor, is set between 6# scrapper conveyors and 2# lignite surge bunkers Be equipped with switch, be provided with switch between 6# scrapper conveyors and 1# lignite surge bunkers, 1# lignite surge bunker by 8# scrapper conveyors and 1# into Expect that scrapper conveyor connection, 1# feed scrapper conveyor and connect 1# feeding air-locked valves.
2# electric gate valves are connect by 11# scrapper conveyors with 4# surge bunkers, and 4# surge bunkers are connect with electric feeder, electronic to give Material machine is connected to 6# scrapper conveyors.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected The limitation of range is protected, although being explained in detail to the present invention with reference to preferred embodiment, those skilled in the art answer Work as understanding, technical scheme of the present invention can be modified or replaced equivalently, without departing from the reality of technical solution of the present invention Matter and range.

Claims (10)

1. a kind of efficient upgrading system of lignite of sub-prime classification, including pre-processing device, eddy flow dissolve poly- upgrading system, sub-prime point Grade equipment and air-transport system, it is characterised in that:The pre-processing device includes loading machine, crusher, conveying equipment, vibration Sieve and apparatus for feeding, the eddy flow dissolve the hot-blast stove that poly- upgrading system includes drying machine and provides high-temperature flue gas for drying machine, The sub-prime classifying equipoment includes level-one flue gas sorting separator, secondary smoke sorting separator, three-level separator;The loading Machine is that the crusher transports lignite, and the crusher is connect with the conveying equipment, the conveying equipment and the vibrating screen Connection, the vibrating screen are connect with the apparatus for feeding, and the apparatus for feeding closes air-valve by charging and connect with the drying machine, The drying machine is connect with the hot-blast stove by hot blast pipe, and the drying machine connects the sorting separation of level-one flue gas by flow-disturbing valve Device, the brown coal powder after drying and upgrading enter level-one flue gas with high-temperature flue gas and sort separator, the level-one flue gas sorting point Secondary smoke is connected by hot blast pipe from device and sorts separator, the secondary smoke sorting separator connects three-level by hot blast pipe Separator, the secondary smoke sorting separator and the three-level separator are separately connected air-transport system, Geldart-D particle system System connection finished bin.
2. a kind of efficient upgrading system of lignite of sub-prime classification according to claim 1, it is characterised in that:The crusher Including level-one crusher, secondary breaker and tertiary crusher, the vibrating screen includes that primary vibration sieve and secondary vibration are sieved, and one Grade crusher is sieved with primary vibration and is connect by conveying equipment, and the thick lignite that primary vibration sieves is transported to by conveying equipment The lignite of secondary breaker, the setting grain size that the primary vibration sieves is transported to apparatus for feeding by conveying equipment, described Secondary breaker is connected by conveying equipment and secondary vibration sieve, and the thick lignite that secondary vibration is sieved is conveyed by conveying equipment The lignite of the setting grain size sieved to tertiary crusher, the secondary vibration is transported to apparatus for feeding by conveying equipment, institute Tertiary crusher is stated to connect with the apparatus for feeding.
3. a kind of efficient upgrading system of lignite of sub-prime classification according to claim 2, it is characterised in that:The level-one is broken Broken machine is the jaw crusher of 80mm, and the secondary breaker is the rod-toothed crusher of 30mm, and the tertiary crusher is 3mm Double-roll crusher, the primary vibration sieve and secondary vibration sieve are the vibrating screening machines of 3mm;The conveying equipment is scrapper conveyor Or belt conveyor, the apparatus for feeding are charging scrapper conveyors.
4. according to a kind of efficient upgrading system of lignite of any sub-prime classifications of claim 1-3, it is characterised in that:It is described It is cyclone dust collectors that level-one flue gas, which sorts separator, and the secondary smoke sorting separator is cyclone dust collectors, three fraction It is bag filter from device.
5. a kind of efficient upgrading system of lignite of sub-prime classification according to claim 1, it is characterised in that:The upgrading is set Standby further includes finished product caching system, finished product packing system, clean-production system, water system and air supply system;The drying machine Including the first drying machine and the second drying machine, lignite that is broken and screening is assigned to the first drying machine and second by sub-material scrapper conveyor Drying machine.
6. a kind of efficient upgrading system of lignite of sub-prime classification according to claim 1, it is characterised in that:The upgrading system System further includes air-introduced machine and outer smoke evacuation chimney, and the air-introduced machine connection three-level separator generates negative pressure, the outer row of air-introduced machine connection Chimney.
7. a kind of efficient upgrading system of lignite of sub-prime classification according to claim 1, it is characterised in that:The upgrading system System further includes that finished product summarizes scraper plate, finished product reprints scraper plate, loading machine, coal-fired charging scrapper conveyor, coal-fired sub-material scrapper conveyor, electric brake Door, coal-fired surge bunker and the vibrating screen being connect with level-one flue gas sorting separator, the vibrating screen is summarized by the finished product to be scraped Plate and the finished product are reprinted scraper plate and connects with the loading machine, the loading machine by loading machine fire coal charging scrapper conveyor with The fire coal sub-material scrapper conveyor is connect with the coal-fired surge bunker, and the fire coal surge bunker is connect with the hot-blast stove, the combustion It is provided with electric gate valve between coal sub-material scrapper conveyor and the coal-fired surge bunker.
8. according to a kind of efficient upgrading system of lignite of any sub-prime classifications of claim 1-7, it is characterised in that:It is described Upgrading system includes combustion fan, mucking machine, slags tap and belt and slags tap and reprint belt, and the combustion fan is arranged in the hot wind The side of stove provides the oxygen of burning for hot-blast stove, and the hot-blast stove is connect with the mucking machine, and the mucking machine passes through institute It states belt of slagging tap to connect with the reprinting belt of slagging tap, the slag charge reprinted at belt of slagging tap is transported to cinder by transport device Brick field utilizes;
The upgrading system includes bypath system, and bypath system includes bypass gate valve, dust collector of water curtain, air-introduced machine and bypass cigarette Chimney, the hot blast pipe between the bypass gate valve and the hot-blast stove and the drying machine connect, the bypass gate valve and the water Curtain dust-extraction unit connection, the dust collector of water curtain are connect with the air-introduced machine, the flue gas warp after dust collector of water curtain dedusting Chimney bypass is discharged.
9. a kind of efficient method for upgrading of lignite of sub-prime classification, it is characterised in that:Lignite raw material is after crusher in crushing through institute It states scrapper conveyor and is transported to vibrating screen, Vibration Screen selects the powdery brown coal of setting grain size, and the high-temperature flue gas that hot-blast stove generates is drawing Synchronous with pretreated powdery brown coal under the action of wind negative pressure to enter drying machine, powdery brown coal is in drying machine by high speed depolymerization Disperse simultaneously to be in direct contact with high-temperature flue gas and carry out efficient mass heat transfer, by the lignite after dry depolymerization under the action of negative pressure with High-temperature flue gas is discharged from drying machine, obtains the big three-level product of granularity into level-one flue gas sorting separator, is entrained in air-flow In brown coal powder with air-flow go successively to secondary smoke sort separator, through slow down sedimentation obtain first class product, granularity is smaller Brown coal powder obtains secondary product after the separation of three-level separator, and by sub-prime classification, treated that level-one is produced respectively for air-transport system Product and secondary product are transported to finished bin.
10. a kind of efficient method for upgrading of lignite of sub-prime classification according to claim 9, it is characterised in that:Lignite raw material It is admitted to drying machine again after multiple stage crushing and screening, the grain size for the powdery brown coal that Vibration Screen is selected is 3mm or less;It is dry Oxygen content in machine<3%, negative pressure is -500~-800Pa, the inlet temperature of high-temperature flue gas is 900-1600 DEG C, high-temperature flue gas Outlet temperature is 150-180 DEG C.
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Application publication date: 20181016