CN108344287A - A kind of energy-saving and environment-friendly scale grain heat-drying complexes and furnace drying method - Google Patents

A kind of energy-saving and environment-friendly scale grain heat-drying complexes and furnace drying method Download PDF

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Publication number
CN108344287A
CN108344287A CN201810150309.7A CN201810150309A CN108344287A CN 108344287 A CN108344287 A CN 108344287A CN 201810150309 A CN201810150309 A CN 201810150309A CN 108344287 A CN108344287 A CN 108344287A
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CN
China
Prior art keywords
coal
hot
energy
saving
heat
Prior art date
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Pending
Application number
CN201810150309.7A
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Chinese (zh)
Inventor
杨晓明
白金元
张忠杰
杜军科
韩卫国
姚渠
尹君
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MCC Tiangong Group Tianjin Corp Ltd
Academy of State Administration of Grain
Original Assignee
MCC Tiangong Group Tianjin Corp Ltd
Academy of State Administration of Grain
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Publication date
Application filed by MCC Tiangong Group Tianjin Corp Ltd, Academy of State Administration of Grain filed Critical MCC Tiangong Group Tianjin Corp Ltd
Priority to CN201810150309.7A priority Critical patent/CN108344287A/en
Publication of CN108344287A publication Critical patent/CN108344287A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001Drying-air generating units, e.g. movable, independent of drying enclosure
    • F26B21/002Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K1/00Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N1/00Regulating fuel supply
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00Air heaters
    • F24H3/02Air heaters with forced circulation
    • F24H3/06Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/08Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
    • F24H3/087Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes using fluid fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00Preventing emissions
    • F23J2215/20Sulfur; Compounds thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00Intercepting solids
    • F23J2217/10Intercepting solids by filters
    • F23J2217/101Baghouse type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2201/00Pretreatment of solid fuel
    • F23K2201/10Pulverizing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/06Grains, e.g. cereals, wheat, rice, corn

Abstract

The present invention provides a kind of energy-saving and environment-friendly scale grain heat-drying complexes and furnace drying methods.Energy-saving and environment-friendly scale grain heat-drying complexes include coaling system 100, combustion system 200, heat-exchange system 300 and exhaust gas Solid state fermentation system 400;Raw coal is made broken coal including the use of coaling system 100 and sent into combustion system 200 by energy-saving and environment-friendly scale grain heat-drying method; broken coal is prepared into coal dust and burnt in combustion system 200 and generates coal smoke; coal smoke enters in heat-exchange system 300 to exchange heat with cold wind; cold wind after being heated dries grain; exhaust gas Solid state fermentation system 400 recycles the dust and exhaust gas that are generated in process of coal combustion, harmless treatment and discharge.It is low that the beneficial effects of the invention are as follows operating costs, and work efficiency is high, and personnel labor intensity is low, meets environmental requirement.

Description

A kind of energy-saving and environment-friendly scale grain heat-drying complexes and furnace drying method
Technical field
The invention belongs to grain drying fields, more particularly, to a kind of scale grain drying device and furnace drying method.
Background technology
China is a populous country, with the continuous growth of population, in order to meet the grain demand in China, also Storage need to be dried in a large amount of grain.How the quality of grain reservation is ensured for a long time, and country is in each area all needles Many grain drying devices are established to property, in order to ensure grain can thoroughly dry, less loss amount, grain heat-drying skill The development of art is of crucial importance.
By investigating fuel used in the grain drying device of domestic corn in Northeast China, southern area paddy at present From the point of view of investigation:85% is accounted for by the heat source of fuel of fire coal;7% is accounted for by the heat source of fuel of natural gas;With biological renewable energy 3% is accounted for for the heat source of fuel;Using alcohol-based fuel, alcohol-ether fuel 5% is accounted for as the heat source of fuel.Because using fuel different, scale Grain drying cost is also different, and higher as drying heat source cost using the fuel other than fire coal, enterprise operation is of high cost.Cause This, improves efficiency, reduces the demand of personnel labor intensity in current grain heat-drying field there is operating cost is reduced.
Invention content
The problem to be solved in the present invention is low according to the efficiency of current grain drying device, and temperature control is unstable, from work Skill angle is set out, the coal-fired expense of reduction, guarantee temperature control, reaches the color and luster of grain and unit weight shines with consecutive days and air-dries quite, Improve the grade of grain.For this purpose, a kind of energy-saving and environment-friendly scale grain drying device of present invention offer and furnace drying method, energy Grain heat-drying operating cost is enough reduced, drying efficiency is improved, reduces person works' intensity.
In order to solve the above technical problems, the technical solution adopted by the present invention is:A kind of energy-saving and environment-friendly scale grain baking Dry complexes, it is characterised in that:Including coaling system, combustion system, heat-exchange system and exhaust gas Solid state fermentation system;
The coaling system is arranged for raw coal being prepared into broken coal and is conveyed to combustion system;Including additive bin, Oscillating feeder, raw coal crusher, coal conveyer and coal bunker in inclination, the additive bin top are provided with round steel grid section, Lower part is provided with funnel, with the above arrangement, can prevent coal cinder from directly causing to impact to funnel, extends funnel service life;
The oscillating feeder is arranged on the additive bin, and the lower mouth and the raw coal of the oscillating feeder are broken Machine connects, with the above arrangement, coal cinder can be prevented to be blocked in funnel, improves working efficiency;
The raw coal crusher is arranged for raw coal being prepared into broken coal and be conveyed by coal conveyer in the inclination To the coal bunker, it is provided with iron remover on coal conveyer in the inclination, the outlet of the coal bunker is connected with the conveying mechanism It connects.By the way that iron remover is arranged, the Fe base impurity in broken coal can be removed, the purity of broken coal is improved and then prepares coal dust after improving Purity, to improve efficiency of combustion.
The combustion system, including conveying mechanism, coal-grinding mechanism, coal injection organization, burner and energy-saving pulverized coal hot-blast stove:Institute It states conveying mechanism with the coaling system to be connected, the conveying mechanism includes but not limited to conveyer belt conveying mechanism or spiral transferring Mechanism is sent, preferably, conveying mechanism uses spiral conveying mechanism, simple in structure, good leak tightness.
The coal-grinding mechanism is connected by the conveying mechanism with the coaling system, the coal-grinding mechanism and the spray Coal mechanism connects, and the coal injection organization is connect with the burner, preferably, the coal-grinding mechanism and the coal injection organization are Coal-grinding, coal powder injection all-in-one machine, the coal-grinding, coal powder injection all-in-one machine top are provided with funnel, are arranged inside the coal-grinding, coal powder injection all-in-one machine There are coal-grinding blade and fan blade, the coal-grinding, coal powder injection all-in-one machine to be connected with the burner by coal powder injection connecting tube.It is logical Arrangement above is crossed, equipment volume can be reduced, working space is saved, keeps work system more intensive.
It is provided with auxiliary air duct on the outside of the burner, before coal dust enters burner combustion, burner can be carried out pre- Heat allows combustion process since suitable temperature, keeps burning more abundant.
The energy-saving pulverized coal hot-blast stove is closed, and burner inlet, flue outlet are provided on the energy-saving pulverized coal hot-blast stove And hot-blast stove cleaning door, the energy-saving pulverized coal hot-blast stove are connected by the burner inlet with the burner;Pass through Arrangement above, combustion process are a totally-enclosed processes, and utilization efficiency of heat energy is high, and working environment is improved.
Preferably, further including desulfurizer, the desulfurizer is by being arranged on the energy-saving pulverized coal hot-blast stove Desulfurization hole be connected with the energy-saving pulverized coal hot-blast stove.With the above arrangement, the sulphur content in burning in coal dust can be sloughed, subtract Sulfur dioxide pollution in few tail gas, improves environment protecting.
Preferably, further including denitrification apparatus, the denitrification apparatus is by being arranged on the energy-saving pulverized coal hot-blast stove Denitration nozzle be connected with the energy-saving pulverized coal hot-blast stove.With the above arrangement, can slough nitrogen oxides in flue gas at Point, the nitrogen oxides pollution in tail gas is reduced, environment protecting is improved.
The heat-exchange system includes heat exchanger, hot cigarette entrance, the outlet of hot cigarette and the heat exchange being arranged on the heat exchanger Device cleaning door, cold air duct, hot air chamber, machice to supply fan and drying tower;
The cold air duct is configured to pass sequentially through on the outside of the burner, inside the energy-saving pulverized coal hot-blast stove and Inside heat exchanger, with the above arrangement, can repeatedly be heated to the cold wind in cold air duct, heat exchange efficiency is high.
One end of the cold air duct is provided with cold air inlet, and the other end is connected with the hot air chamber, the air feed wind Machine is arranged for the hot wind in the hot air chamber being delivered in drying tower;With the above arrangement, exchanging heat using with hot coal cigarette The clean gas crossed is heated grain rather than is directly heated using the coal-fired hot gas generated, is avoided to grain Pollution.
Preferably, explosion venting device is provided in the hot cigarette outlet of heat exchanger, with the above arrangement, in system pressure mistake Emergency relief can be carried out when big, keeps whole system safer.
The exhaust gas Solid state fermentation system includes negative-pressure pipeline, bag filter, the ultra-fine bag filters of DMC, dedusting wind Machine and chimney;The negative-pressure pipeline is connected by the hot-blast stove cleaning door with the energy-saving pulverized coal hot-blast stove, described negative Pressure pipeline is connected by the heat exchanger cleaning door with the heat exchanger, and the negative-pressure pipeline is connected with the bag filter It connects;With the above arrangement, avoiding artificial deashing, reduce labor intensity, work efficiency is high.
The ultra-fine bag filters of DMC are connected by the hot cigarette outlet with the heat exchanger, the ultra-fine cloth of DMC The other end of bag dust collector is connected by the dedusting fan with the chimney;With the above arrangement, the exhaust gas of discharge can be made Reach environmental protection standard, reduces dust content in exhaust gas.
Preferably, further including air compression system, the air compression system is arranged for removing for the cloth bag Dirt device and the ultra-fine bag filters of the DMC provide compressed air, and the air compression system includes compressor, air accumulator with And sub-cylinder, the compressor are connect by oil water separator with the air accumulator, the air accumulator by pressure reducing valve with it is described Sub-cylinder connects, the sub-cylinder compressed air with the bag filter and the ultra-fine bag filters of the DMC respectively Entrance is connected.By introducing air compression system, keep whole device work system more complete, while also avoiding storage pressure The security risk that contracting air tank may be brought.
Preferably, the burner and/or the energy-saving pulverized coal hot-blast stove and/or the heat exchanger and/or described If being provided with dry temperature sensor on drying tower, the conveying mechanism is configured to the induction number according to the temperature sensor It is worth manual and/or automatic adjusting inlet amount.It can need to adjust the supply amount of coal dust according to temperature by arrangement above, and then adjust The degree of burning is saved to play the effect for adjusting temperature.
Further, in automatic adjustment, conveying speed and the sensor temperature of conveying mechanism are negative-feedback regu- lations, that is, are worked as The conveying speed of conveying mechanism can reduce when sensor temperature increases, with the above arrangement, improving the steady of humidity control system It is qualitative, keep temperature control more accurate.
Using a kind of furnace drying method of energy-saving and environment-friendly scale grain drying device of above-mentioned apparatus, its step are as follows:
S1. raw coal is prepared to broken coal by the coaling system, and is conveyed to the conveying mechanism;By walking above Suddenly, the preliminary crushing of raw coal is completed, and eliminates the Fe base impurity in raw coal, the purity of coal is improved, to improve Efficiency of combustion.
S2. the delivery rate of conveying mechanism is adjusted according to required temperature, broken coal is sent into the coal pulverizer by conveying mechanism Broken coal is prepared into coal dust by structure, the coal-grinding mechanism;By above step, raw coal is further crushed, coal and air are improved Contact area, to improve efficiency of combustion, simultaneously because delivery rate is adjustable, temperature control is more stablized.
S3. burner is preheated, while cold wind enters the cold air duct from the cold air inlet;By setting above It sets, burning is made to start at a suitable temperature, improve efficiency of combustion.
S4. coal dust enters the coal injection organization, is injected into mix with air in the burner and burn, while is cold Wind is located at the pipeline section on the outside of the burner by the cold air duct, assists coal dust firing and cold wind is made to be heated;Pass through Coal dust and air are sufficiently mixed by above step, improve the contact area of coal dust and air, to improve efficiency of combustion, into One step, the cold air duct on the outside of burner acts as the combustion-supporting wind pipeline of burner, while improving efficiency of combustion The heat distributed using burner heats the cold wind in cool air hose, improves the utilization rate of thermal energy.
S5. the coal dust to burn, which enters in the energy-saving pulverized coal hot-blast stove, carries out second-time burning, while cold wind is by described cold Wind pipeline is located at the pipeline section on the inside of the energy-saving pulverized coal hot-blast stove, is heated again, while in the energy-saving pulverized coal hot-blast stove The coal ash of generation is entered by the negative-pressure pipeline in the bag filter through the hot-blast stove cleaning door;By walking above Suddenly, coal dust carries out second-time burning, keeps burning more abundant, to improve efficiency of combustion, is generated in energy-saving pulverized coal hot-blast stove Heat heats the cold wind in cool air hose again, improves the utilization rate of thermal energy, and coal ash is negative since atmospheric pressure effect is inhaled into Pressure pipeline enters in bag filter, eliminates the trouble of artificial ash disposal, reduces labor intensity, while can play coal ash collecting Come, to utilize again.
S6. the hot cigarette that the energy-saving pulverized coal hot-blast stove generates is entered by the hot cigarette entrance carries out heat in the heat exchanger Amount exchanges, while cold wind is located at the pipeline section in the heat exchanger into the cold air duct and carries out heat exchange, while hot cigarette band The coal ash entered in the heat exchanger is entered by the negative-pressure pipeline in the bag filter through the heat exchanger cleaning door;It is logical Above step is crossed, the hot coal cigarette after heating carries out sufficient heat exchange with the cold air in cool air hose, while coal ash is due to air pressure Effect is inhaled into negative-pressure pipeline and enters in bag filter, eliminates the trouble of artificial ash disposal, reduces labor intensity, while can Coal ash collecting is got up, to utilize again.
S7. hot cigarette is passed through by the hot cigarette outlet after carrying out heat exchange into the ultra-fine bag filters of the DMC, then successively Entered in air by the dedusting fan and the smoke stack emission;By above step, smoke content in tail gas is reduced, is met Environmental requirement.
S8. the cold wind heated after heat exchange is stored in the hot air chamber;
S9. the machice to supply fan provides cold wind heated in hot air chamber to progress grain baking in the drying tower It is dry.By above step, complete the drying to grain, due to cold wind heated used in drying grain not with coal dust It was in direct contact, and avoided and grain is polluted.
In conclusion by using above-mentioned technical proposal, there is following good effect:
(1) temperature control is accurate, improves grain quality
(2) totally-enclosed operation improves working environment
(3) remove artificial deashing, reduce labor intensity
(4) dedusting is collected waste material and can be utilized again
(5) emission compliance, dust emission standard are leading
(6) heat exchange efficiency is improved, avoids blocking
(7) performance indicator reaches environmental emission standard
Description of the drawings
Fig. 1 is the overall structure diagram of one embodiment of the invention
Fig. 2 is the coaling system schematic diagram of one embodiment of the invention
Fig. 3 is the combustion system schematic diagram of one embodiment of the invention
Fig. 4 is the combustion system schematic diagram of another embodiment of the present invention
Fig. 5 is the coal-grinding of one embodiment of the invention, coal powder injection all-in-one machine structure schematic diagram
Fig. 6 is the heat-exchange system schematic diagram of one embodiment of the invention
Fig. 7 is the heat-exchange system operation principle schematic diagram of one embodiment of the invention
Fig. 8 is the exhaust gas Solid state fermentation system schematic of one embodiment of the invention
Fig. 9 is the air compression system schematic diagram of one embodiment of the invention
In figure:
100, coaling system 200, combustion system 300, heat-exchange system
400, exhaust gas Solid state fermentation system 500, air compression system 600, temperature sensor
110, additive bin 120, vibration coal feeder 130, raw coal crusher
140, coal transporter 141, iron remover 150, coal bunker in inclination
210a, spiral conveying mechanism 211a, driving motor 220, coal-grinding mechanism
230, coal injection organization 231, coal powder injection air inlet 232, coal powder injection connecting tube
240, burner 241, fire maker 250, energy-saving pulverized coal hot wind
221, coal-grinding blade 222, fan blade stove
251, burner inlet 252, flue outlet 253, hot-blast stove cleaning door
310, hot cigarette entrance 320, hot cigarette outlet 330, cold air duct
331, cold air inlet 332, burner pipeline section 333, hot-blast stove pipeline section
334, heat exchanger pipeline section 340, heat exchanger cleaning door 350, explosion venting device
311, spray calcium device 360, hot air chamber 370, machice to supply fan
380, drying tower 420, bag filter 430, the ultra-fine cloth bags of DMC
431, contact deduster is swept in unloading valve 432, blowback
440, dedusting fan 450, chimney 510, compressor
520, oil water separator 530, air accumulator 540, pressure reducing valve
550, sub-cylinder 210b, conveyer belt conveyer 211b, driving wheel
111, round steel grid section structure 112, funnel
260, desulfurizer 261, desulfurization hole 270, denitrification apparatus
271, denitration nozzle 410, negative-pressure pipeline
Specific implementation mode
It will illustrate the specific implementation mode of the present invention with a preferred embodiment of the present invention below:
As Fig. 1, one embodiment of the invention overall structure diagram shown in, which includes coaling system 100, burning System 200, heat-exchange system 300, exhaust gas Solid state fermentation system 400, air compression system 500 and temperature sensor 600.
As Fig. 2, one embodiment of the invention coaling system schematic diagram shown in, coaling system 100 is set in the present embodiment For raw coal to be prepared into broken coal and is conveyed to combustion system 200;Including additive bin 110, oscillating feeder 120, raw coal is broken Broken machine 130, coal conveyer 140 and coal bunker 150 in inclination, in the present embodiment, preferably, 110 top of additive bin is set It is equipped with round steel grid section 111, lower part is provided with funnel 112, with the above arrangement, can be first when falling into additive bin 110 with coal cinder It is contacted with round steel grid section 111, can prevent coal cinder from directly causing to impact to funnel 112, extend the service life of funnel 112;
Oscillating feeder 120 is arranged on additive bin 110, and lower mouth and the raw coal crusher 130 of oscillating feeder 120 connect It connects, with the above arrangement, coal cinder can be prevented to be blocked in funnel 112, improves working efficiency;
Raw coal crusher 130 is arranged for raw coal being prepared into broken coal and above coal conveyer 140 is delivered to by inclination The outlet of coal bunker 150, coal bunker 150 is connected with conveying mechanism 210.Coal bunker 150 mainly is arranged for storing a certain amount of broken Coal is provided with iron remover 141, by the way that iron remover is arranged preferably, being tilted in the present embodiment on upper coal conveyer 140 141, the Fe base impurity in broken coal can be removed, the purity of broken coal is improved and then prepares the purity of coal dust after improving, to carry High burning efficiency.
As Fig. 3, one embodiment of the invention combustion system schematic diagram shown in, combustion system 200, including conveying mechanism 210, Coal-grinding mechanism 220, coal injection organization 230, burner 240 and energy-saving pulverized coal hot-blast stove 250:Conveying mechanism 210 and coaling system 100 are connected, and conveying mechanism 210 includes but not limited to conveyer belt conveying mechanism 210b or spiral conveying mechanism 210a, this implementation In example, preferably, conveying mechanism 210 uses spiral conveying mechanism 210a, simple in structure, good leak tightness.
Coal-grinding mechanism 220 is connected by conveying mechanism 210 with coaling system 100, coal-grinding mechanism 220 and coal injection organization 230 connections, coal injection organization 230 are connect with burner 240, preferably, in the present embodiment, coal-grinding mechanism 220 and coal powder injection machine Structure 230 is coal-grinding, coal powder injection all-in-one machine, as shown in figure, the coal-grinding of 5 one embodiment of the invention, coal powder injection all-in-one machine structure schematic diagram, mill Coal, coal powder injection all-in-one machine top are provided with funnel, and coal-grinding, coal powder injection all-in-one machine are internally provided with coal-grinding blade 221 and fan blade 222, coal-grinding, coal powder injection all-in-one machine are connected by coal powder injection connecting tube 232 with burner 240, when operating, coal-grinding, coal powder injection one Machine can obtain air from coal powder injection air inlet 231, and coal dust is injected into along coal powder injection connecting tube 232 in burner 240.By with On the setting that is combined into one coal-grinding mechanism 220 and coal injection organization 230, equipment volume can be reduced, working space is saved, make work It is more intensive to make system.
Igniter 241 is provided on burner 240, outside is provided with auxiliary air duct 332, with the above arrangement, can be right Burner 240 is preheated, and allows burning to be proceeded by from suitable temperature, burning can be made more abundant.
Energy-saving pulverized coal hot-blast stove 250 is closed, and burner inlet 251, flue outlet are provided on energy-saving pulverized coal hot-blast stove 250 252 and hot-blast stove cleaning door 253, energy-saving pulverized coal hot-blast stove 250 be connected with burner 240 by burner inlet 251; With the above arrangement, combustion process is a totally-enclosed process, utilization efficiency of heat energy is high, and working environment is improved.
In the present embodiment, preferably, further including desulfurizer 260, desulfurizer 260 is by being arranged in energy-saving coal Desulfurization hole 261 on powder hot-blast stove 250 is connected with energy-saving pulverized coal hot-blast stove 250.With the above arrangement, can slough in burning Sulphur content in coal dust reduces the sulfur dioxide pollution in tail gas, improves environment protecting.
In the present embodiment, preferably, further including denitrification apparatus 270, denitrification apparatus 270 is by being arranged in energy-saving coal 250 denitration nozzle 271 is connected with energy-saving pulverized coal hot-blast stove 250 on powder hot-blast stove.With the above arrangement, flue gas can be sloughed In nitrogen oxides ingredient, reduce tail gas in nitrogen oxides pollution, improve environment protecting.
Such as the heat-exchange system work of Fig. 6, the heat-exchange system schematic diagram of one embodiment of the invention and Fig. 7, one embodiment of the invention Make shown in principle schematic, heat-exchange system 300 includes heat exchanger 300, hot cigarette entrance 310, the hot cigarette being arranged on heat exchanger 300 Outlet 320 and heat exchanger cleaning door 340, cold air duct 330, hot air chamber 360, machice to supply fan 370 and drying tower 380;
Cold air duct 330 is configured to pass sequentially through on the outside of burner 240, inside energy-saving pulverized coal hot-blast stove 250 and changes Inside hot device 300, with the above arrangement, can repeatedly be heated to the cold wind in cold air duct 330, heat exchange efficiency is high;Cold wind Pipeline 330 gathers inside 240 outside of burner, 250 inside of energy-saving pulverized coal hot-blast stove and heat exchanger 300, by setting above It sets, transfer path can be increased, keep heat exchange more abundant.
One end of cold air duct 330 is provided with cold air inlet 331, and the other end is connected with hot air chamber 360, machice to supply fan 370 are arranged for the hot wind in hot air chamber 360 being delivered in drying tower 380;With the above arrangement, using in cold air duct Grain is heated rather than directly heated using the coal-fired hot gas generated by the heated clean gas of hot coal cigarette, is kept away The pollution to grain is exempted from.
In the present embodiment, preferably, being provided with explosion venting device 350 in the hot cigarette outlet 320 of heat exchanger 300, lead to Arrangement above is crossed, emergency relief can be carried out when system pressure is excessive, avoid the generation of explosion or reduces extent of the destruction, is made entire System is safer.
As Fig. 8, one embodiment of the invention exhaust gas Solid state fermentation system schematic shown in, exhaust gas Solid state fermentation system 400 Including negative-pressure pipeline 410, bag filter 420, the ultra-fine bag filters 430 of DMC, dedusting fan 440 and chimney 450;It is negative Pressure pipeline 410 is connected by hot-blast stove cleaning door 253 with energy-saving pulverized coal hot-blast stove 250, and negative-pressure pipeline 410 is clear by heat exchanger Grey mouth 340 is connected with heat exchanger 300, and negative-pressure pipeline 440 is connected with bag filter 420;With the above arrangement, can pass through Underbalance effect collects the coal ash in energy-saving pulverized coal hot-blast stove 250 and heat exchanger 300, is sent into bag filter 420, avoids people Work deashing, reduces labor intensity, and work efficiency is high.Bag filter 420 will be stored in grey library after coal ash collecting, it is convenient with It utilizes again afterwards.
The ultra-fine bag filters 430 of DMC are connected by hot cigarette outlet 320 with heat exchanger 300, the ultra-fine bag-type dusts of DMC The other end of device 430 is connected by dedusting fan 440 with chimney 450;Contain with the above arrangement, dust in exhaust gas can be reduced Amount, makes the exhaust gas of discharge reach environmental protection standard.
As Fig. 9, one embodiment of the invention air compression system schematic diagram shown in, in the present embodiment, preferably, Further include air compression system 500, air compression system 500 is arranged for as bag filter 420 and the ultra-fine cloth bags of DMC Deduster 430 provides compressed air, simultaneously can be used for providing stable air-flow for coal injection device 230 and cold air duct 330.It is empty Air pressure compression system 500 includes compressor 510, air accumulator 530 and sub-cylinder 550, and compressor 510 passes through oil water separator 520 It is connect with air accumulator 530, air accumulator 530 is connect by pressure reducing valve 540 with sub-cylinder 550, and sub-cylinder 550 is removed with cloth bag respectively Compressed air inlet on dirt device 420 and the ultra-fine bag filters of DMC 430 is connected.By the way that air compression system is arranged 500, keep whole device work system more complete, while also avoiding storing the safety that excessive compressed air cylinder may be brought hidden Suffer from.
In the present embodiment, it is all provided on burner 240 and energy-saving pulverized coal hot-blast stove 250 and heat exchanger 300 and drying tower 380 If being equipped with dry temperature sensor 600, conveying mechanism 210 be configured to according to the induction numerical value of temperature sensor 600 manually and Automatically adjust inlet amount.Conveying mechanism 210a driving parts, the rotating speed of direct current variable frequency motor 210b are shown as in the present embodiment It can change according to the reading of temperature sensor 600;When direct current variable frequency motor 210b rotating speeds increase, the supply of coal dust increases, Combustion heat release is more, temperature rise;When direct current variable frequency motor 210b rotating speeds reduce, the supply of coal dust is reduced, combustion heat release It reduces, temperature declines.It can need to adjust the supply amount of coal dust according to temperature by arrangement above, and then adjust the rule of burning Mould, to play the effect for adjusting temperature.
Further, preferably, in automatic adjustment, conveying speed and 600 temperature of sensor of conveying mechanism 210 It is negative-feedback regu- lation, i.e., when 600 temperature of sensor increases, the conveying speed of conveying mechanism 210 can reduce, the supply of coal dust It reduces, combustion heat release is reduced, and temperature declines;When 600 temperature of sensor increases, the conveying speed of conveying mechanism 210 will increase, The supply of coal dust increases, and combustion heat release increases, warm temperature rise;To make temperature be always maintained in a certain range, pass through Arrangement above improves the stability of humidity control system, keeps temperature control more accurate.
Next illustrate a kind of energy-saving and environment-friendly scale grain provided by the invention in conjunction with a preferred embodiment of the present invention Furnace drying method:
S1. raw coal is prepared to broken coal by coaling system 100, and is conveyed to conveying mechanism 210;By above step, The preliminary crushing of raw coal is completed using raw coal crusher 130, and removes iron on tilting upper coal conveyer 140 using being arranged Device 141 eliminates the Fe base impurity in raw coal, the purity of coal is improved, to improve efficiency of combustion.
S2. the delivery rate of conveying mechanism 210 is adjusted according to required temperature, broken coal is sent into coal-grinding by conveying mechanism 210 Broken coal is prepared into coal dust by mechanism 220, coal-grinding mechanism 210;By above step, raw coal is further crushed, improve coal with The contact area of air, to improve efficiency of combustion, simultaneously because delivery rate is adjustable, temperature control is more stablized.
S3. igniter 241 preheats burner 240, while cold wind enters cold air duct 330 from cold air inlet 331; With the above arrangement, burning is made to start at a suitable temperature, efficiency of combustion is improved.
S4. coal dust enters coal injection organization 230, is injected into mix with air in burner 240 and burn, while cold wind It is located at the pipeline section 332 in 240 outside of burner by cold air duct 330, assist coal dust firing and cold wind is made to be heated;By with Upper step, coal dust and air are sufficiently mixed, and improve the contact area of coal dust and air, to improve efficiency of combustion, into one Step, the cold air duct 332 positioned at 240 outside of burner acts as the combustion-supporting wind pipeline of burner 240, improves efficiency of combustion While the heat that is distributed using burner 240 cold wind in cool air hose 330 is heated, improve the utilization rate of thermal energy.
S5. the coal dust to burn, which enters, carries out second-time burning in energy-saving pulverized coal hot-blast stove 250, while cold wind passes through cold air duct 330 are located at the pipeline section 333 of 250 inside of energy-saving pulverized coal hot-blast stove, are heated again, while production in energy-saving pulverized coal hot-blast stove 250 Raw coal ash is entered by negative-pressure pipeline 410 in bag filter 420 through hot-blast stove cleaning door 253;Pass through above step, coal Powder carries out second-time burning, keeps burning more abundant, to improve efficiency of combustion, the heat generated in energy-saving pulverized coal hot-blast stove 250 Amount heats the cold wind in cool air hose 330 again, improves the utilization rate of thermal energy, coal ash is inhaled into due to atmospheric pressure effect Negative-pressure pipeline 410 enters in bag filter 420, eliminates the trouble of artificial ash disposal, reduces labor intensity, while can be by coal Ash collects, to utilize again.
S6. the hot cigarette that energy-saving pulverized coal hot-blast stove 250 generates, which is entered by hot cigarette entrance 310 in heat exchanger 300, carries out heat It exchanges, while cold wind enters the pipeline section 334 that cold air duct 330 is located in heat exchanger 300 and carries out heat exchange, while hot cigarette band The coal ash entered in heat exchanger 300 is entered by negative-pressure pipeline 410 in bag filter 420 through heat exchanger cleaning door 340;By with Upper step, the hot coal cigarette after heating carries out sufficient heat exchange with the cold air in cool air hose 330, while coal ash is due to air pressure effect Negative-pressure pipeline 410 should be inhaled into enter in bag filter 420, the trouble of artificial ash disposal is eliminated, reduce labor intensity, together When coal ash collecting can be got up, to utilize again.
S7. hot cigarette is passed through by hot cigarette outlet 320 after carrying out heat exchange into the ultra-fine bag filters 430 of DMC, then is led to successively It crosses dedusting fan 440 and chimney 450 drains into air;By above step, smoke content in tail gas is reduced, meets environmental protection It is required that.
S8. the cold wind heated after heat exchange is stored in hot air chamber 360;
S9. machice to supply fan 370 provides cold wind heated in hot air chamber 360 to progress grain baking in drying tower 380 It is dry.By above step, complete the drying to grain, due to cold wind heated used in drying grain not with coal dust It was in direct contact, and avoided and grain is polluted.
Several preferred embodiments of the present invention have shown and described in above description, but as previously described, it should be understood that the present invention Be not limited to form disclosed herein, be not to be taken as excluding other embodiments, and can be used for various other combinations, Modification and environment, and the above teachings or related fields of technology or knowledge can be passed through in the scope of the invention is set forth herein It is modified.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be in this hair In the protection domain of bright appended claims.

Claims (15)

1. a kind of energy-saving and environment-friendly scale grain heat-drying complexes, it is characterised in that:Including coaling system, combustion system, Heat-exchange system and exhaust gas Solid state fermentation system;
The coaling system is arranged for raw coal being prepared into broken coal and is conveyed to combustion system;
The combustion system, including conveying mechanism, coal-grinding mechanism, coal injection organization, burner and energy-saving pulverized coal hot-blast stove:The mill Coal mechanism is connected by the conveying mechanism with the coaling system, and the coal-grinding mechanism is connect with the coal injection organization, institute It states coal injection organization to connect with the burner, the energy-saving pulverized coal hot-blast stove is closed, is provided on the energy-saving pulverized coal hot-blast stove Burner inlet, flue outlet and hot-blast stove cleaning door, the energy-saving pulverized coal hot-blast stove pass through the burner inlet and institute Burner is stated to be connected;
The heat-exchange system includes heat exchanger, and hot cigarette entrance, the outlet of hot cigarette and the heat exchanger being arranged on the heat exchanger are clear Grey mouth is configured to pass sequentially through on the outside of the burner, cold inside the energy-saving pulverized coal hot-blast stove and inside heat exchanger Wind pipeline, hot air chamber, machice to supply fan and drying tower;One end of the cold air duct is provided with cold air inlet, the other end and institute It states hot air chamber to be connected, the machice to supply fan is arranged for the hot wind in the hot air chamber being delivered in drying tower;
The exhaust gas Solid state fermentation system includes negative-pressure pipeline, bag filter, the ultra-fine bag filters of DMC, dedusting fan with And chimney;The negative-pressure pipeline is connected by the hot-blast stove cleaning door with the energy-saving pulverized coal hot-blast stove, the negative tube Road is connected by the heat exchanger cleaning door with the heat exchanger, and the negative-pressure pipeline is connected with the bag filter; The ultra-fine bag filters of DMC are connected by the hot cigarette outlet with the heat exchanger, the ultra-fine bag filters of DMC The other end be connected with the chimney by the dedusting fan;
If being provided on the burner and/or the energy-saving pulverized coal hot-blast stove and/or the heat exchanger and/or the drying tower Dry temperature sensor, the conveying mechanism are configured to manual and/or automatic according to the induction numerical value of the temperature sensor Adjust inlet amount.
2. a kind of energy-saving and environment-friendly scale grain heat-drying complexes according to claim 1, it is characterised in that:Also wrap Desulfurizer is included, the desulfurizer passes through the desulfurization hole being arranged on the energy-saving pulverized coal hot-blast stove and energy-saving pulverized coal heat Wind furnace is connected.
3. a kind of energy-saving and environment-friendly scale grain heat-drying complexes according to claim 1, it is characterised in that:Also wrap Denitrification apparatus is included, the denitrification apparatus passes through the denitration nozzle being arranged on the energy-saving pulverized coal hot-blast stove and the energy-saving pulverized coal Hot-blast stove is connected.
4. a kind of energy-saving and environment-friendly scale grain heat-drying complexes according to claim 1, it is characterised in that:It is described Coaling system includes additive bin, oscillating feeder, raw coal crusher, coal conveyer and coal bunker in inclination, the feeding leakage Bucket top is provided with round steel grid section, and lower part is provided with funnel, and the oscillating feeder is arranged on the additive bin, described to shake The lower mouth of dynamic batcher is connect with the raw coal crusher, and the raw coal crusher is arranged for raw coal being prepared into broken coal simultaneously It is delivered to the coal bunker by coal conveyer in the inclination, iron remover, the coal are provided on coal conveyer in the inclination The outlet in storehouse is connected with the conveying mechanism.
5. a kind of energy-saving and environment-friendly scale grain heat-drying complexes according to claim 1, it is characterised in that:Also wrap Air compression system is included, the air compression system is arranged for as the bag filter and the ultra-fine cloth bags of the DMC Deduster provides compressed air, and the air compression system includes compressor, air accumulator and sub-cylinder, and the compressor passes through Oil water separator is connect with the air accumulator, and the air accumulator is connect by pressure reducing valve with the sub-cylinder, the sub-cylinder point It is not connected with the compressed air inlet of the bag filter and the ultra-fine bag filters of the DMC.
6. a kind of energy-saving and environment-friendly scale grain heat-drying complexes as claimed in any of claims 1 to 5, It is characterized in that:The conveying mechanism includes but not limited to spiral conveying mechanism or conveyer belt conveying mechanism.
7. a kind of energy-saving and environment-friendly scale grain heat-drying complexes as claimed in any of claims 1 to 5, It is characterized in that:The coal-grinding mechanism and the coal injection organization are coal-grinding, coal powder injection all-in-one machine, the coal-grinding, coal powder injection all-in-one machine top It is provided with funnel, the coal-grinding, coal powder injection all-in-one machine are internally provided with coal-grinding blade and fan blade, the coal-grinding, coal powder injection one Body machine is connected by coal powder injection connecting tube with the burner.
8. a kind of energy-saving and environment-friendly scale grain heat-drying complexes as claimed in any of claims 1 to 5, It is characterized in that:It is provided with explosion venting device in the hot cigarette outlet of the heat exchanger.
9. a kind of energy-saving and environment-friendly scale grain heat-drying method, including:
S1. raw coal is prepared to broken coal by coaling system, and is conveyed to conveying mechanism;
S2. broken coal is sent into coal-grinding mechanism by the conveying mechanism, and broken coal is prepared into coal dust by the coal-grinding mechanism;
S3. burner is preheated, while cold wind enters cold air duct from cold air inlet;
S4. coal dust enters coal injection organization, is injected into mix with air in the burner and burn, while cold wind passes through institute The pipeline section that cold air duct is located on the outside of the burner is stated, coal dust firing is assisted and cold wind is made to be heated;
S5. the coal dust to burn, which enters, carries out second-time burning in energy-saving pulverized coal hot-blast stove, while cold wind passes through the cold air duct position Pipeline section on the inside of the energy-saving pulverized coal hot-blast stove, is heated again, while the coal generated in the energy-saving pulverized coal hot-blast stove Ash is entered by negative-pressure pipeline in bag filter through hot-blast stove cleaning door;
S6. the hot cigarette that the energy-saving pulverized coal hot-blast stove generates is entered by the hot cigarette entrance carries out heat exchange in heat exchanger, Cold wind is located at the progress heat exchange of the pipeline section in the heat exchanger into the cold air duct simultaneously, while hot cigarette brings described change into Coal ash in hot device is entered by the negative-pressure pipeline in the bag filter through heat exchanger cleaning door;
S7. hot cigarette is passed through by the outlet of hot cigarette after carrying out heat exchange into the ultra-fine bag filters of DMC, then passes sequentially through dedusting fan Enter in air with smoke stack emission;
S8. the cold wind heated after heat exchange is stored in hot air chamber;
S9. cold wind heated in hot air chamber is provided and carries out grain heat-drying in drying tower by machice to supply fan.
CN201810150309.7A 2018-02-13 2018-02-13 A kind of energy-saving and environment-friendly scale grain heat-drying complexes and furnace drying method Pending CN108344287A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112414074A (en) * 2020-12-13 2021-02-26 王江波 Drying device is used in weaving cloth processing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112414074A (en) * 2020-12-13 2021-02-26 王江波 Drying device is used in weaving cloth processing
CN112414074B (en) * 2020-12-13 2021-07-09 威海毛纺织集团有限公司 Drying device is used in weaving cloth processing

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