CN109869983A - A kind of energy saving and environment friendly lignite power generation integrated system - Google Patents
A kind of energy saving and environment friendly lignite power generation integrated system Download PDFInfo
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- CN109869983A CN109869983A CN201910172706.9A CN201910172706A CN109869983A CN 109869983 A CN109869983 A CN 109869983A CN 201910172706 A CN201910172706 A CN 201910172706A CN 109869983 A CN109869983 A CN 109869983A
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- 239000003077 lignite Substances 0.000 title claims abstract description 67
- 238000010248 power generation Methods 0.000 title claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 104
- 239000003546 flue gas Substances 0.000 claims abstract description 49
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims description 124
- 238000009826 distribution Methods 0.000 claims description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 16
- 239000002918 waste heat Substances 0.000 abstract description 9
- 239000003245 coal Substances 0.000 abstract description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 230000005611 electricity Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 238000010977 unit operation Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 11
- 238000009423 ventilation Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000008187 granular material Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 206010013786 Dry skin Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000011899 heat drying method Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001535 kindling effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004058 oil shale Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/02—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
- F26B17/04—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces the belts being all horizontal or slightly inclined
- F26B17/045—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces the belts being all horizontal or slightly inclined the material on the belt being agitated, dispersed or turned over by mechanical means, e.g. by vibrating the belt, by fixed, rotating or oscillating elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
- F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a kind of energy saving and environment friendly lignite power generation integrated systems, including coal-burning boiler and brown coal drying equipment, wherein the high-temperature flue gas discharge line of coal-burning boiler is divided into two-way by two blowers, it is connect respectively with two air inlets of brown coal drying equipment, two air outlets of brown coal drying equipment are sequentially connected deduster and air-introduced machine；The steam-turbine discharge line of coal-burning boiler is connected to the helical axis of brown coal drying equipment；The discharge port of brown coal drying equipment is discharged in the conveying device connecting with coal-burning boiler feed inlet or feed bin through baiting valve.The beneficial effects of the present invention are: this system is to be integrated by drying brown coal equipment with coal-fired electric generation furnace, using power plant's waste heat as the heat source of brown coal drying, improve the economy of power plants generating electricity unit operation, combustion power generation is carried out with the lignite after drying, power supply efficiency can be improved, reduce net coal consumption rate, save power supply cost, increase the income of power plant's operation, to realize the efficient optimization using with process system of power plant's energy.
Description
This case is divisional application, the denomination of invention of original application are as follows: a kind of dry using the lignite of power-plant flue gas and steam waste heat
Drying method and drying equipment, the applying date of original application are as follows: 2016-08-31, original application application No. is: 201610773815.2.
Technical field
The present invention relates to cleaning coal power generation brown coal drying technical field, in particular to a kind of energy saving and environment friendly lignite power generation
Integrated system.
Background technique
Lignite rich reserves, it is cheap, by more and more coal fired power plants in increasingly prominent energy problem
Pay attention to.But contain 20 ~ 50% moisture in lignite, the lignite of high-moisture directly participates in burning, so that combustion exhaust gas heat loss is tight
Weight, generating set low efficiency, performance driving economy is poor, engineering construction is at high cost.The flue gas generated during lignite combustion power generation
It passes through with steam and is discharged frequently as low-quality heat source, cause the waste of the energy.There are many kinds of the technologies of brown coal drying, by drying
The mode that medium is contacted with wet stock can be divided into direct-heating type drying and the dry two major classes of indirect heating type, industrial common
The method of brown coal drying is the direct-heating type comvection dryer using flue gas as dried medium, such as gas flow dryer, rotary drying
Device, rotary pipe type drier and fluidized bed dryer etc..Gas flow dryer structure is simple, treating capacity is big, drying time is short, but is
Resistance of uniting is big；Revolving drier and rotary pipe type drier operating flexibility is big, production capacity is big, but equipment volume is big, disposable
Investment is high；Fluidized bed dryer structure is simple, low cost, easy to maintenance, treating capacity is big, but requires wet stock size distribution equal
It is even.For lignite size distribution for power generation in 0 ~ 50mm, being dried using ordinary fluidized bed dryer will appear bulky grain also
Be not fluidized and little particle to be less easily entrained by out bed outer；Or little particle is fluidized and bulky grain is static not
It is dynamic, there is dead bed or hot air distribution plate sieve pore blockade problem.Brown coal drying process needs to consume the energy to provide heat, and lignite
The flue gas and steam generated during combustion power generation is discharged frequently as low-quality heat source, causes the waste of the energy, institute
It is got growing concern for the utilization of power-plant flue gas waste heat.Patent CN104048479A is heating fluid-bed within disclosing
For the brown coal drying system of drying equipment；Patent CN203907646U discloses a kind of brown using the drying of boiler of power plant fume afterheat
The system of coal；Patent CN102796581A discloses the pre-dried method of lignite；Patent CN204665854U, which is disclosed, utilizes pot
Furnace tail flue gas and extracted steam from turbine (water vapour) are heat source, using water vapour as the lignite of dried medium or bituminous coal drying system；
Patent CN102759118A is disclosed carries out the pre-dried technique of lignite with power-plant flue gas waste heat in roller drier；Patent
CN102353237A discloses the lignite predry drying system using the fluidized bed dryer with internal heater as drying equipment.It is above-mentioned
There are different problems in drying means or equipment, for example there is the local retention area of material in various degree in practical applications, for
The inflammable and explosive material such as lignite and oil shale can have burning and explosion if Local Residence Time is too long in drying equipment
Etc. security risks, and cause dry materials uneven, of poor quality.
Summary of the invention
Goal of the invention of the invention be to provide a kind of energy conservation and environmental protection, efficiently, safety using more than power-plant flue gas and steam
The brown coal drying method and drying equipment of heat, this method are the low-quality flue gases and steaming to generate during lignite combustion power generation
Vapour is dried medium, the drying of lignite is carried out in multistage mobile fluidized bed drying equipment, then the lignite after drying is efficiently fired
Power generation is burnt, brown coal drying system is negative pressure, half closed cycle (closing) system, and oxygen content is lower than 12% in equipment, avoids lignite
Lignite after drying is re-used as the efficient burning raw material of power generation by the danger of burning.
In order to achieve the above-mentioned object of the invention, the present invention provides a kind of brown coal dryings using power-plant flue gas and steam waste heat
Method, which is characterized in that the drying means includes being dried twice:
(1) primary drying processing is carried out to moist material first with the high-temperature flue gas that coal-fired boiler in power plant is expelled directly out；It is described
High-temperature flue gas is directly uniformly contacted with moist material, and intermediate material is obtained；
(2) high-temperature flue gas and steam for then coal-fired boiler in power plant being recycled to be expelled directly out simultaneously carry out intermediate material secondary dry
Dry processing；The high-temperature flue gas is directly uniformly contacted with intermediate material, while intermediate material and the heat exchanger tube for being connected with steam
Uniformly contact carries out heat exchange, obtains dried material, realizes redrying processing.
Wherein, the primary drying processing specifically:
Moist material is placed on a level-one dry and ventilated plate, moist material is made to be evenly distributed on the level-one dry and ventilated plate
Above and moist material is enable at the uniform velocity to move forward, it is angularly disposed on the level-one dry and ventilated plate to have ventilation hole, the high temperature
Flue gas is contacted through the ventilation hole with the moist material upwardly by the level-one dry and ventilated plate lower end, the tide
Wet stock uniformly contacts during forward movement with high-temperature flue gas, completes primary drying processing.
The redrying processing specifically:
By primary drying, treated that intermediate material is transported on a secondary drying ventilating board, and intermediate material is made to be evenly distributed on institute
It states on secondary drying ventilating board and the intermediate material is enable at the uniform velocity to move forward, it is oblique on the secondary drying ventilating board to set
It is equipped with ventilation hole, the high-temperature flue gas is by secondary drying ventilating board lower end upwardly through the ventilation hole and the humidity
Material is contacted, meanwhile, the heat exchanger tube for being connected with steam is provided on secondary drying ventilating board, intermediate material is in forward movement
It not only uniformly contacts with high-temperature flue gas, is also contacted with heat exchanger tube in the process, complete redrying processing.
It is dried process twice and passes through a mobile fluidized bed plant completion；The mobile fluidized bed plant is from top to bottom
It is disposed with level-one dry and ventilated plate, intermediate bulkhead and secondary drying ventilating board, is provided with and pushes away above level-one dry and ventilated plate
The mobile device of dynamic moist material, be provided with above secondary drying ventilating board push intermediate material mobile and can be passed through steam with
The device of intermediate material indirect heat exchange；
The drying means specifically:
Moist material is entered by the upper end feed inlet of multistage mobile vulcanization plant, by level-one dry and ventilated plate and secondary drying
Ventilating board is finally discharged by the discharge port of lower end；
High-temperature flue gas is divided into two-way and is passed through in mobile fluidized bed plant, and high-temperature flue gas is respectively by level-one dry and ventilated plate and second level
The ventilation hole of dry and ventilated plate is contacted with moist material and intermediate material respectively, above level-one dry and ventilated plate, intermediate bulkhead with
Air outlet is provided among secondary drying ventilating board, the flue gas that two-way high-temperature flue gas is formed after exchanging heat passes through two dedustings
It is discharged again by two air-introduced machines after device；
Steam is passed through in mobile fluidized bed plant by heat exchanger tube, is contacted with the intermediate material, and what is formed after steam heat-exchanging is cold
Condensate is expelled directly out by heat exchanger tube；
Moist material is handled by high-temperature flue gas primary drying, and high-temperature flue gas and secondary steam are dried, and obtains dried material.
In order to preferably realize foregoing invention purpose, the brown of power-plant flue gas and steam waste heat is utilized the present invention provides a kind of
Coal drying equipment, including rack and the cabinet being sealingly disposed in around the rack, wherein the cabinet include upper box lid, on
Cabinet and lower box are provided with intermediate bulkhead between the upper box and the lower box；The machine in the upper box
Upper layer hot air distribution plate is tiltedly installed on frame, the top box between the intermediate bulkhead and the upper layer hot air distribution plate
It is provided with air inlet on body sidewall, is provided with air outlet on the side wall of the upper box lid；The rack in the lower box
On be tiltedly installed with lower layer's hot air distribution plate, be provided on the nowel body sidewall below lower layer's hot air distribution plate into
Air port is provided with air outlet between lower layer's hot air distribution plate and the intermediate bulkhead；The air inlet and high temperature cigarette
Feed channel connection；
Described upper box one end is provided with feed inlet, is arranged on upper layer hot air distribution plate described in the side opposite with the feed inlet
There is intermediate discharge port, be tiltedly installed with guide plate on the side wall of upper box described in the intermediate discharge port side, is located at institute
It states and is provided with discharge port on lower layer's hot air distribution plate described in feed inlet the same side；
The upper layer hot air distribution plate and lower layer's hot air distribution plate offer inclined channel, and the percent opening of the inclined channel is
2%-25%, preferably 18%, the diameter of the inclined channel are 1-4mm, and preferably 2mm, the inclined channel and horizontal direction are in 10-
20 ° of angles, preferably 15 °.
The upper layer hot air distribution plate is tilted down with material moving direction to be arranged in the rack, the upper layer hot wind
Distribution grid is horizontal by 2-4 ° of angle, preferably 3 °.
The feed inlet is provided with inlet valve, and the intermediate discharge port is provided with the intermediate blanking with intermediate blanking valve
Pipe, the discharge port are provided with outlet valve.
Upper materials delivery device is provided in the rack above the upper layer hot air distribution plate；
The upper materials delivery device includes that turning on the chain drive component is arranged in chain drive component and several groups
Flitch component, the material rotating plate component includes transverse support bar and several are uniformly fixed on the stirring in the transverse support bar
Plate；The both ends of the transverse support bar are fixed on the chain drive component；
The transverse support bar is parallel with the upper layer hot air distribution plate, and the material rotating plate lower end surface and the upper layer hot wind point
The distance between fabric swatch upper surface is 10-50mm, preferably 30mm.
The material rotating plate is trapezoidal plate and is inclined in the transverse support bar that the material rotating plate is laterally propped up with described
Angle between strut axis is 0~45 °, and preferably 30 °, the material rotating plate in the same transverse support bar is in axis
It is symmetrical.
The chain drive component include drive chain wheel shaft, driven chain wheel shaft, two be separately positioned on the drive sprocket
The drive sprocket at axis both ends and two are separately positioned on the driven sprocket at driven chain wheel shaft both ends, described in the same side
Drive sprocket is connected with the driven sprocket by roller chain, and through-hole, institute are provided in the inner links of the roller chain
It states transverse support bar both ends and is welded with the fixed plate with through-hole, the material rotating plate component is by passing through the logical of the roller chain
The bolt of hole and the fixed plate through-hole is fixed on the chain drive component.
The material rotating plate component includes two transverse support bars disposed in parallel, on the material rotating plate there are two settings
Through-hole, the transverse support bar pass through the through-hole and weld with the material rotating plate.
Lower layer's material pushing mechanism is additionally provided in the rack above lower layer's hot air distribution plate；The lower layer
Material pushing mechanism includes helical axis with interior cavity, and described helical axis one end is connected with driving device, and the helical axis is another
End is provided with the rotary joint connecting with heat medium pipeline, and described helical axis one end is additionally provided with the condensation being connected to the cavity
Water discharge pipe, the steam that the end of the rotary joint is provided with condensation-water drain and is connected to the cavity set in the helical axis
Import.
The spiral shaft diameter is 100-500mm, preferably 300mm, and the spire of the helical axis outer surface is several
It is welded to axisymmetric helical blade, the central axis angle of the helical blade and the helical axis is 10-30 °, excellent
It is selected as 20 °.
The air inlet is connect by blower with the high-temperature flue gas pipeline that coal-fired boiler in power plant is discharged；The air outlet passes through
It is connect after one deduster with an air-introduced machine.
Inner sidewall, the inner sidewall are provided on the side wall of lower box described in lower layer's material pushing mechanism two sides
Room is heated in the side for forming sealing with the side wall of the lower box, and the both ends of side heating room are respectively arranged with steam inlet and steaming
Vapor outlet；Side heating interior is connected with the high-temperature steam of flowing, carries out for the material to lower layer's material pushing mechanism indirect
Heating.
The present invention also provides it is a kind of include brown coal drying such as the described in any item brown coal drying equipment of claim 1-9
With the integrated system of power generation, which is characterized in that the integrated system includes coal-burning boiler and the brown coal drying equipment, the combustion
The high-temperature flue gas discharge line of coal burning boiler is divided into two-way by two blowers, connects respectively with the air inlet of the brown coal drying equipment
It connects, two air outlets of the brown coal drying equipment are sequentially connected deduster and air-introduced machine；The coal-burning boiler steam turbine
Steam vent tube is connected to the helical axis of brown coal drying equipment；The discharge port of brown coal drying equipment is discharged to through the baiting valve
In the conveying device or feed bin being connect with the coal-burning boiler feed inlet.
The beneficial effects of the present invention are: drying means of the invention has the advantage that (1) is dry by lignite of power plant's waste heat
Dry heat source improves the economy of power plants generating electricity unit operation；(2) combustion power generation is carried out with the lignite after drying, can be improved
Power supply efficiency reduces net coal consumption rate, saves power supply cost, increases the income of power plant's operation；(3) system and lignite of drying brown coal
Electricity generation system is integrated, realizes the efficient optimization using with process system of power plant's energy, is the multi-production process of power plant；(4)
Drying system is negative pressure, and oxygen content avoids lignite kindling less than 12% in system；(5) the lignite water content after drying is uniform,
The operational efficiency for improving boiler is conducive to the normal operation of boiler, improves service life.Wherein, drying equipment of the invention
Structure is simple, and occupied area is small, and flexible operation, residence time of material is short, solves material prolonged stay and arranges in drying equipment
The problem of not coming out, effectively prevents the susceptible to plugging situation of material sieve pore, material moisture is uniform, realizes wide size distribution
Uniform granular material fluidize or move, keep safe operation process convenient.
Detailed description of the invention
Fig. 1 is the method flow diagram of the embodiment of the present invention 1.
Fig. 2 is the structural schematic diagram of the embodiment of the present invention 2.
Fig. 3 is the structural schematic diagram (left view that visual angle is Fig. 1) of material rotating plate in the embodiment of the present invention 2.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is the structural schematic diagram of lower layer's material pushing mechanism in the embodiment of the present invention 2.
Fig. 6 is the structural schematic diagram that room is heated in side in the embodiment of the present invention 2.
Wherein, appended drawing reference are as follows: 1.1 coal-burning boilers；1.2 steam turbine；1.3 inlet valve；1.4 turns of material valves；1.5 outlet valve；
1.6 material rotating plate Component driver motors；1.7 helical axis driving motors；1.8 deduster；1.9 deduster；1.10 air-introduced machine；1.11 drawing
Blower；1.12 secondary drying ventilating board；1.13 level-one dry and ventilated plates；1.14 mobile fluidized bed plant；1.15 intermediate bulkhead；
1, outlet valve；2, lower box；3, air inlet；4, lower layer's material pushing mechanism；5, lower layer's hot air distribution plate；6, middle interval
Plate；7, air outlet；8, air inlet；9, upper layer hot air distribution plate；10, drive sprocket；11, inlet valve；12, upper box lid；13, outlet air
Mouthful；14, roller chain；15, material rotating plate component；16, driven sprocket；17, guide plate；18, upper box；19, intermediate blanking pipe；
20, intermediate blanking valve；21, support frame；22, driving device；23, fixed plate；24, material rotating plate；25, transverse support bar；26, spiral
Axis；27, helical blade；28, rotary joint；29, condensed water discharge pipe；30, condensation-water drain；31, steam inlet；32, side adds
Hot cell.
Specific embodiment
In order to clarify the technical characteristics of the invention, being illustrated below by specific embodiment to this programme.
Embodiment 1
The present invention provides a kind of brown coal drying method using power-plant flue gas and steam waste heat, drying means includes drying twice
It handles (referring to Fig. 1):
(1) primary drying processing is carried out to moist material first with the high-temperature flue gas that coal-fired boiler in power plant 1.1 is expelled directly out；It is high
Warm flue gas is directly uniformly contacted with moist material, and intermediate material is obtained；
(2) high-temperature flue gas and steam for then coal-fired boiler in power plant 1.1 being recycled to be expelled directly out carry out two to intermediate material simultaneously
Secondary drying process；High-temperature flue gas is directly uniformly contacted with intermediate material, while intermediate material and the heat exchanger tube for being connected with steam
Uniformly contact carries out heat exchange, obtains dried material, realizes redrying processing.
Wherein, primary drying is handled specifically:
Moist material is placed on a level-one dry and ventilated plate 1.13, moist material is made to be evenly distributed on level-one dry and ventilated plate
On 1.13 and moist material is enable at the uniform velocity to move forward, it is angularly disposed on level-one dry and ventilated plate 1.13 to have ventilation hole, high temperature
Flue gas penetrates ventilation hole upwardly by 1.13 lower end of level-one dry and ventilated plate and is contacted with moist material, and moist material is forward
It is uniformly contacted in mobile process with high-temperature flue gas, completes primary drying processing.
Redrying processing specifically:
By primary drying, treated that intermediate material is transported on a secondary drying ventilating board 1.12, is uniformly distributed intermediate material
On secondary drying ventilating board 1.12 and intermediate material is enable at the uniform velocity to move forward, it is oblique on secondary drying ventilating board 1.12 to set
It is equipped with ventilation hole, high-temperature flue gas penetrates ventilation hole upwardly by 1.12 lower end of secondary drying ventilating board and connect with moist material
Touching, meanwhile, the heat exchanger tube for being connected with steam is provided on secondary drying ventilating board 1.12, intermediate material is during forward movement
It not only uniformly contacts with high-temperature flue gas, is also contacted with heat exchanger tube, complete redrying processing.
It is dried process twice and passes through a mobile completion of fluidized bed plant 1.14；Mobile fluidized bed plant 1.14 is by upper
Level-one dry and ventilated plate 1.13, intermediate bulkhead 1.15 and secondary drying ventilating board 1.12 are disposed under, level-one is dry logical
It is provided with the device for pushing moist material mobile above aerofoil 1.13, it is intermediate that promotion is provided with above secondary drying ventilating board 1.12
Material is mobile and can be passed through the device of steam Yu intermediate material indirect heat exchange；
Drying means specifically:
Moist material is entered by the inlet valve 1.3 of the upper end feed inlet of multistage mobile vulcanization plant, by level-one dry and ventilated
The material valve 1.4 that turns of the feeder pipe of plate 1.13 is fallen on secondary drying ventilating board 1.12, finally by lower end discharge outlet discharging
Valve 1.5 is discharged；
High-temperature flue gas is divided into two-way by pipeline and is passed through in mobile fluidized bed plant 1.14, and high-temperature flue gas is dried by level-one respectively
The ventilation hole of ventilating board 1.13 and secondary drying ventilating board 1.12 is contacted with moist material and intermediate material respectively, and level-one is dry logical
Air outlet, two-way high-temperature flue gas are provided among 1.13 top of aerofoil, intermediate bulkhead 1.15 and secondary drying ventilating board 1.12
The flue gas formed after exchanging heat by after deduster 1.8 and deduster 1.9 again respectively by air-introduced machine 1.10 and air-introduced machine 1.11
Discharge；
Steam is discharged in the heat exchanger tube for entering mobile fluidized bed plant 1.14 through steam turbine 1.2, contacts with intermediate material, steam
The condensed water formed after heat exchange is expelled directly out by heat exchanger tube；
Moist material is handled by high-temperature flue gas primary drying, and high-temperature flue gas and secondary steam are dried, and obtains dried material.
Embodiment 2
Referring to fig. 2, the present invention is a kind of brown coal drying equipment using power-plant flue gas and steam waste heat, including rack and sealing are set
Set the cabinet around rack, wherein cabinet includes upper box lid 12, upper box 18 and lower box 2, upper box 18 and lower box 2
Between be provided with intermediate bulkhead 6；It is tiltedly installed with upper layer hot air distribution plate 9 on 18 interior framework of upper box, is located at middle interval
It is provided with air inlet 8 on 18 side wall of upper box between plate 6 and upper layer hot air distribution plate 9, is arranged on the side wall of upper box lid 12
There is air outlet 13；It is tiltedly installed with lower layer's hot air distribution plate 5 on 2 interior framework of lower box, is located under lower layer's hot air distribution plate 5
It is provided with air inlet 3 on square 2 side wall of lower box, air outlet 7 is provided between lower layer's hot air distribution plate 5 and intermediate bulkhead 6；
Air inlet 8 and air inlet 3 are connect with high-temperature flue gas pipeline；
18 upper surface side of upper box is provided with feed inlet, is provided on the side upper layer hot air distribution plate 9 opposite with feed inlet
Intermediate discharge port is tiltedly installed with guide plate 17, guide plate on the side wall of upper box described in the intermediate discharge port side
17 are located at 9 lower end of upper layer hot air distribution plate, and guide plate 17 can be avoided material accumulation, enter intermediate blanking mouth to material and play and lead
To effect；Discharge port is provided on feed inlet the same side lower layer hot air distribution plate 5；
Upper layer hot air distribution plate 9 and lower layer's hot air distribution plate 5 offer inclined channel, and the percent opening of inclined channel is 2%-25%, excellent
18 ° are selected as, the diameter of inclined channel is 1-4mm, and preferably 2mm, inclined channel and horizontal direction are in 10-20 ° of angle；Inclined channel can
Feed blocking is avoided well, it is unobstructed to ensure that hot wind enters.
Upper layer hot air distribution plate 9 is tilted down with material moving direction and is arranged on the rack, upper layer hot air distribution plate 9 and water
Plane be in 2-4 ° of angle, preferably 3 °.
Feed inlet is provided with inlet valve 11, and intermediate discharge port is provided with the intermediate blanking pipe 19 with intermediate blanking valve 20,
Discharge port is provided with outlet valve 1.
Upper materials delivery device is provided on methods, rack on upper layer hot air distribution plate 9；
Referring to Fig. 3 and Fig. 4, upper materials delivery device includes that chain drive component and several groups are arranged on chain drive component
Material rotating plate component 15, material rotating plate component 15 include transverse support bar 25 and several be uniformly fixed in transverse support bar 25
Material rotating plate 24；The both ends of transverse support bar 25 are fixed on chain drive component；Wherein, material rotating plate 24 is trapezoidal plate, and is tilted
It is arranged in transverse support bar 25, the angle between 25 axis of material rotating plate 24 and transverse support bar is 0~45 °, preferably 30 °,
Material rotating plate 24 in same transverse support bar 25 is axisymmetricly distributed, and is moved to lower section convenient for material rotating plate component 15 and is smoothly dialled
Material.
Transverse support bar 25 is parallel with upper layer hot air distribution plate 9, and on 24 lower end surface of material rotating plate and upper layer hot air distribution plate 9
The distance between end face is 10-50mm, preferably 30mm.
Chain drive component include drive chain wheel shaft, driven chain wheel shaft, two be separately positioned on drive chain wheel shaft both ends
Drive sprocket 10 and two are separately positioned on the driven sprocket 16 at driven chain wheel shaft both ends, 10 He of drive sprocket positioned at the same side
Driven sprocket 16 is connected by roller chain 14, is provided with through-hole in the inner links of roller chain 14, and 25 liang of transverse support bar
End is welded with the fixed plate 23 with through-hole, and material rotating plate component 15 passes through 23 through-hole of through-hole and fixed plate across roller chain 14
Bolt be fixed on chain drive component.Wherein, driving device is connected on drive chain wheel shaft (not show, can refer in Fig. 2
The position of the material rotating plate Component driver motor 1.6 showed in Fig. 1 and mechanism), this driving device includes that motor and motor export
The driving wheel of axis connection, the driven wheel connected by belt or chain, driven wheel are fixed on drive chain wheel shaft, wherein for driving
The driving device for moving the drive chain wheel shaft is the prior art, and in this not go into detail.
Material rotating plate component includes two transverse support bars 25 disposed in parallel, and there are two through-holes for setting on material rotating plate 24, horizontal
Through-hole is passed through to support rod 25 and is welded with material rotating plate 24.
Lower layer's material pushing mechanism 4 is additionally provided on methods, rack on lower layer's hot air distribution plate 5；Referring to Fig. 5, lower layer's object
Expect that delivery device 4 includes helical axis 26 with interior cavity, helical axis one end is connected in driving device 22(Fig. 2 to show, can join
Examine the position of helical axis driving motor 1.7 and mechanism in Fig. 1), it (is preferably steaming that 26 other end of helical axis, which is provided with thermal medium,
Vapour) piping connection rotary joint 28,26 one end of helical axis is additionally provided with the condensed water discharge pipe being connected to 26 cavity of rotary shaft
29, the steam inlet 31 that 28 end of rotary joint is provided with condensation-water drain 30 and is connected to the cavity set in helical axis 26.
The ontology diameter of helical axis 26 be 100-500mm, preferably 300, the spire of helical axis outer surface is several right
Axisymmetric helical blade 27 is welded, and the central axis angle of helical blade 27 and 26 ontology of helical axis is 10-30 °, excellent
It is selected as 20 °.
Referring to Fig. 6, be provided with inner sidewall on the side wall of lower layer's material pushing mechanism two sides lower box 2, inner sidewall with
Room 32 is heated in the side that the side wall of lower box 2 forms sealing, and the both ends of side heating room 32 are respectively arranged with steam inlet and steam goes out
Mouthful；Side heating interior is connected with the high-temperature steam of flowing, carries out indirect heating for the material to lower layer's hot air distribution plate.
Wherein, the lower end surface of upper layer hot air distribution plate and lower layer's hot air distribution plate is provided with support frame 21, support frame 21
It is fixed on the rack.
Air inlet is connect by blower with the high-temperature flue gas pipeline that coal-fired boiler in power plant is discharged；Air outlet passes through a deduster
It is connect afterwards with an air-introduced machine.
In use, wet stock is added on the hot air distribution plate of upper layer through feed inlet, fine grained is subjected to fluidised form by hot wind
Change drying, and coarse granule rises under the drive of upper materials delivery device and dries while mobile, removal surface water, material (including
Fine grained and coarse granule) it is sent into lower dry chamber, that is, lower box 2 by intermediate blanking pipe 19 by intermediate blanking valve 20；Material into
After entering lower layer's hot air distribution plate, by hot wind to the direct convective drying of material further progress, meanwhile, by lower layer's material pusher
The conduction heat transfer of saturated vapor and metal wall surface in structure 4 carries out indirect heating drying to material, and material is in hot wind and lower layer's object
Expect to enter baiting valve discharge under the action of delivery device 4, condensed water is discharged from central tube；Exhaust gas after heat exchange is arranged by air outlet
Out.
Embodiment 3
Referring to Fig. 1, the embodiment of the invention provides the integrated systems of a kind of brown coal drying and power generation, including 1.1 He of coal-burning boiler
Brown coal drying equipment (i.e. mobile fluidized bed plant 1.14 in embodiment 1 namely the brown coal drying equipment in embodiment 2), combustion
The high-temperature flue gas discharge line of coal burning boiler 1.1 is divided into two-way by pipeline and connect with mobile fluidized bed plant 1.14, and level-one is dry
It is provided with air outlet among 1.13 top of ventilating board, intermediate bulkhead 1.15 and secondary drying ventilating board 1.12, air outlet is successively
Connect deduster and air-introduced machine；The steam vent tube of the steam turbine 1.2 of coal-burning boiler 1.1 and the helical axis of brown coal drying equipment
Connection；The discharge port of brown coal drying equipment is connect by baiting valve 1.7 with the feed inlet of coal-burning boiler 1.1.Wherein, the present embodiment
In brown coal drying equipment using the brown coal drying equipment in embodiment 2.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of energy saving and environment friendly lignite power generation integrated system, which is characterized in that the integrated system includes coal-burning boiler and brown
Coal drying equipment, the brown coal drying equipment include rack and the cabinet that is sealingly disposed in around the rack, the cabinet packet
Upper box lid, upper box and lower box are included, is provided with intermediate bulkhead between the upper box and the lower box；Positioned at the top box
Be tiltedly installed with upper layer hot air distribution plate in the internal rack, be located at the intermediate bulkhead and the upper layer hot air distribution plate it
Between be provided with air inlet on the top box body sidewall, be arranged on the top box body sidewall above the upper layer hot air distribution plate
There is air outlet；It is tiltedly installed with lower layer's hot air distribution plate in the rack in the lower box, is located at lower layer's hot wind
Be provided with air inlet on the nowel body sidewall below distribution grid, be located at lower layer's hot air distribution plate and the intermediate bulkhead it
Between be provided with air outlet；The air inlet is connect with high-temperature flue gas pipeline；
Described upper box one end is provided with feed inlet, is arranged on upper layer hot air distribution plate described in the side opposite with the feed inlet
There is intermediate discharge port, is provided with discharge port on lower layer's hot air distribution plate described in described feed inlet the same side；
The high-temperature flue gas discharge line of the coal-burning boiler is divided into two-way by two blowers, respectively with the brown coal drying equipment
The connection of two air inlets, two air outlets of the brown coal drying equipment are sequentially connected deduster and air-introduced machine；Institute
The steam-turbine discharge line for stating coal-burning boiler is connected to the helical axis of brown coal drying equipment；The brown coal drying equipment goes out
Material mouth is discharged in the conveying device connecting with the coal-burning boiler feed inlet or feed bin through the baiting valve.
2. integrated system according to claim 1, which is characterized in that the upper layer hot air distribution plate and lower layer's hot wind
Distribution grid offers inclined channel, and the percent opening of the inclined channel is 2%-25%, and the diameter of the inclined channel is 1-4mm, described
Inclined channel and horizontal direction are in 10-20 ° of angle.
3. integrated system according to claim 1, which is characterized in that the upper layer hot air distribution plate is with material moving direction
It tilts down and is arranged in the rack, the upper layer hot air distribution plate is horizontal by 2-4 ° of angle.
4. integrated system according to claim 1-3, which is characterized in that be located on the upper layer hot air distribution plate
Upper materials delivery device is provided in Fang Suoshu rack；
The upper materials delivery device includes that turning on the chain drive component is arranged in chain drive component and several groups
Flitch component, the material rotating plate component includes transverse support bar and several are uniformly fixed on the stirring in the transverse support bar
Plate；The both ends of the transverse support bar are fixed on the chain drive component.
5. integrated system according to claim 4, which is characterized in that the transverse support bar and the upper layer hot wind are distributed
Plate is parallel, and the distance between the material rotating plate lower end surface and upper layer hot air distribution plate upper surface are 10-50mm.
6. integrated system according to claim 4, which is characterized in that the material rotating plate is trapezoidal plate and is inclined at institute
It states in transverse support bar, the angle between the material rotating plate and the cross-brace rod axis is 0~45 °, is located at same described
The material rotating plate in transverse support bar is axisymmetricly distributed.
7. according to the described in any item integrated systems of claim 3-6, which is characterized in that the chain drive component includes driving
Sprocket shaft, driven chain wheel shaft, two drive sprockets for being separately positioned on drive chain wheel shaft both ends and two are separately positioned on
The driven sprocket at driven chain wheel shaft both ends passes through roller chain positioned at the drive sprocket of the same side and the driven sprocket
Item connects, and is provided with through-hole in the inner links of the roller chain, the transverse support bar both ends are welded with through-hole
Fixed plate, the material rotating plate component are fixed on institute by the bolt of the through-hole and the fixed plate through-hole that pass through the roller chain
It states on chain drive component.
8. integrated system according to claim 1-7, which is characterized in that be located on lower layer's hot air distribution plate
Lower layer's material pushing mechanism is additionally provided in Fang Suoshu rack；Lower layer's material pushing mechanism includes spiral with interior cavity
Axis, described helical axis one end are connected with driving device, and the helical axis other end is provided with the rotation connecting with heat medium pipeline
Connector, described helical axis one end are additionally provided with condensed water discharge pipe.
9. brown coal drying equipment according to claim 8, which is characterized in that the spiral shaft diameter is 100-500mm, institute
State helical axis outer surface spire be it is several be welded to axisymmetric helical blade, the helical blade and the spiral
The central axis angle of axis is 10-30 °.
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| CN201910172706.9A CN109869983A (en) | 2016-08-31 | 2016-08-31 | A kind of energy saving and environment friendly lignite power generation integrated system |
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| CN201910172706.9A CN109869983A (en) | 2016-08-31 | 2016-08-31 | A kind of energy saving and environment friendly lignite power generation integrated system |
| CN201610773815.2A CN106382790B (en) | 2016-08-31 | 2016-08-31 | A kind of brown coal drying method and drying equipment using power-plant flue gas and steam waste heat |
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| CN201610773815.2A Active CN106382790B (en) | 2016-08-31 | 2016-08-31 | A kind of brown coal drying method and drying equipment using power-plant flue gas and steam waste heat |
| CN201910172728.5A Pending CN109869984A (en) | 2016-08-31 | 2016-08-31 | A kind of brown coal drying equipment using power-plant flue gas and steam waste heat |
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| CN201910172728.5A Pending CN109869984A (en) | 2016-08-31 | 2016-08-31 | A kind of brown coal drying equipment using power-plant flue gas and steam waste heat |
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| CN107477980A (en) * | 2017-08-23 | 2017-12-15 | 江苏羚羊水泥工程技术有限公司 | A kind of brown coal drying fluid unit and system |
| CN107576178A (en) * | 2017-08-31 | 2018-01-12 | 北京环清环境科技有限公司 | A kind of material drying system and operation method |
| CN109028902A (en) * | 2018-08-28 | 2018-12-18 | 河南省德耀节能科技股份有限公司 | One kind is wet, glues class drying materials system and its drying equipment |
| CN109013671B (en) * | 2018-10-05 | 2020-12-11 | 绍兴迪艾仕机械设计有限公司 | Environment-friendly industrial solid waste recycling and extruding device |
| CN110030795B (en) * | 2019-04-25 | 2023-10-20 | 中冶赛迪技术研究中心有限公司 | Coke drying system and process |
| CN113532084B (en) * | 2021-06-22 | 2023-02-07 | 新疆宝明矿业有限公司 | Oil shale drying equipment |
| CN113514239B (en) * | 2021-06-24 | 2023-03-24 | 国家能源集团新疆能源有限责任公司 | Air distribution plate online detection method and system and storage medium |
| CN113847617A (en) * | 2021-10-27 | 2021-12-28 | 西安热工研究院有限公司 | Coal feeding device with predrying function |
| CN115854694B (en) * | 2022-11-30 | 2023-06-06 | 乳山市东方硅胶有限公司 | Silica gel drying agent production, processing and drying equipment and drying method |
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| CN106382790B (en) | 2019-04-09 |
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