CN110131997A - Coal slime dries the exhaust heat stepped recycling system of lack of gas - Google Patents
Coal slime dries the exhaust heat stepped recycling system of lack of gas Download PDFInfo
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- CN110131997A CN110131997A CN201910514008.2A CN201910514008A CN110131997A CN 110131997 A CN110131997 A CN 110131997A CN 201910514008 A CN201910514008 A CN 201910514008A CN 110131997 A CN110131997 A CN 110131997A
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- China
- Prior art keywords
- gas
- heat exchanger
- lack
- air
- air duct
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F3/00—Cooling or drying of air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D10/00—District heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
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- 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
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/001—Heating arrangements using waste heat
- F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
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- 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
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/007—Dust filtering; Exhaust dust filters
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/17—District heating
-
- 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
Abstract
The present invention provides a kind of coal slimes to dry the exhaust heat stepped recycling system of lack of gas, is related to the technical field of waste heat recycling, including coal slurry drying-machine, lack of gas air duct, heat-exchange system and fresh air duct；Successively pass through multilevel heat exchanger by the high temperature lack of gas exported through coal slurry drying-machine to exchange heat, realizes step and recycle coal slime drying lack of gas waste heat, maximum high efficiente callback waste heat；It alleviates coal slurry drying-machine thermal energy existing in the prior art and wastes serious technical problem, realize system comprehensive energy efficiency height, saved mass energy, integrated operation expense is low, it is environmentally friendly, the pollution to environment can be effectively reduced, the economic benefit and social benefit after popularization and use are prominent.
Description
Technical field
The present invention relates to heat recovery technology fields, dry the exhaust heat stepped recycling of lack of gas more particularly, to a kind of coal slime
System.
Background technique
In order to solve the problems, such as coal slime drying, coal mine generally uses steam-type coal slurry drying-machine to dry coal slime.
In the prior art, coal slurry drying-machine needs to consume a large amount of steam thermal energy, is that 50t/h is with separate unit drying capacity
Example needs to dry coal slime by the steam of 0.5~0.6MPa, and specified separate unit consumption quantity of steam is up to 7.5t/h；Coal slime
The air of water vapour and sucking in the drying course of dryer in drying oven is typically directly emptied by air-introduced machine, coal slime drying
Remaining the big portion's emptying in addition to coal slime carries a small part of the steam heat of process consumption, 90 DEG C of exhausted temperature or so of emptying, phase
To humidity 40% or so, thermal energy waste is very serious.
Summary of the invention
The purpose of the present invention is to provide coal slimes to dry the exhaust heat stepped recycling system of lack of gas, to alleviate in the prior art
Existing coal slurry drying-machine thermal energy wastes serious technical problem.
A kind of coal slime provided by the invention dries the exhaust heat stepped recycling system of lack of gas, comprising: coal slurry drying-machine, lack of gas
Air duct and heat-exchange system；
The heat-exchange system includes multilevel heat exchanger, and the multistage heat exchange equipment is set in turn in the lack of gas air duct
Inside, the coal slurry drying-machine are connected to the lack of gas air duct, so that the high temperature lack of gas exported through the coal slurry drying-machine are successively
It exchanges heat by the multistage heat exchange equipment, the multistage heat exchange equipment with external action end for being connected to respectively；
The wherein level-one heat exchange equipment of the multistage heat exchange equipment is connected by the fresh air duct and the coal slurry drying-machine
It is logical, for the fresh air after heating to be delivered in the coal slurry drying-machine；
In preferred embodiments of the present invention, the heat-exchange system includes that first order air-water heat exchanger, second level gas gas change
Hot device and third level air-water heat exchanger；
The first order air-water heat exchanger, second level gas-gas heat exchanger and third level air-water heat exchanger are all set in described weary
In gas air duct, and the first order air-water heat exchanger, second level gas-gas heat exchanger and third level air-water heat exchanger are along described weary
Gas air duct is set gradually close to one end of the coal slurry drying-machine to the other end, the high temperature lack of gas of coal slurry drying-machine output according to
It is secondary to exchange heat by first order air-water heat exchanger, second level gas-gas heat exchanger and third level air-water heat exchanger；
The air inlet that the gas outlet of the second level gas-gas heat exchanger passes through the fresh air duct and the coal slurry drying-machine
Connection, and fresh-air fan is provided in the fresh air duct.
It further include ground heating equipment in preferred embodiments of the present invention；
The ground heating equipment is connect with the first order air-water heat exchanger, and the first order air-water heat exchanger is used for will
Thermal energy is supplied to the ground heating equipment；And it is provided between the first order air-water heat exchanger and the ground heating equipment
First valve group.
It further include underground air inlet mechanism and well head heat exchanger in preferred embodiments of the present invention；
The well head heat exchanger is connect with the third level air-water heat exchanger, and the third level air-water heat exchanger can be with institute
Well head heat exchanger is stated to exchange heat；And the second valve is provided between the third level air-water heat exchanger and the well head heat exchanger
Group；
The well head heat exchanger is set in the underground air inlet mechanism, and the well head heat exchanger is used for and enters under mine
Air exchange heat.
It further include refrigeration unit in preferred embodiments of the present invention；
The refrigeration unit is connect with the first order air-water heat exchanger, and the first order air-water heat exchanger is used for thermal energy
It supplies to the refrigeration unit；Third valve is provided between the first order air-water heat exchanger and the refrigeration unit.
In preferred embodiments of the present invention, the well head heat exchanger is connect with the refrigeration unit, the refrigeration unit
The air entered under mine can be cooled down by the well head heat exchanger；And the well head heat exchanger and the refrigeration machine
The 4th valve group is provided between group.
It further include cooling tower and heating device in preferred embodiments of the present invention；
The refrigeration unit is connect by the heating device with the entrance of the cooling tower, the outlet of the cooling tower and
The refrigeration unit connection, is connected to so that the refrigeration unit, the heating device form circulation with the cooling tower；
The 5th valve, the heating device and the cooling tower are provided between the refrigeration unit and the heating device
Between be provided with the 6th valve.
In preferred embodiments of the present invention, the first order air-water heat exchanger and the third level air-water heat exchanger connect
It connects, and is provided with the 7th valve between the first order air-water heat exchanger and the third level air-water heat exchanger；
The third level air-water heat exchanger is connect with the refrigeration unit, for receive the first order air-water heat exchanger with
Flow media after refrigeration unit heat exchange, and the is provided between the third level air-water heat exchanger and the refrigeration unit
Eight valves.
It further include dust-extraction unit and discharge drum in preferred embodiments of the present invention；
The one end of the lack of gas air duct far from the coal slurry drying-machine is connect with the dust-extraction unit, and the dust-extraction unit goes out
Mouth end is connect with the discharge drum, and is provided with excessive fan between the dust-extraction unit and the lack of gas air duct, for that will change
Lack of gas after heat are discharged after the dust-extraction unit through the discharge drum.
In preferred embodiments of the present invention, the lack of gas air duct includes main air duct, the first lack of gas pipeline and the second lack of gas
Pipeline；
The internal diameter of the main air duct be respectively greater than the first lack of gas pipeline internal diameter and the second lack of gas pipeline it is interior
Diameter, the both ends of the main air duct are provided with variable diameter interconnecting piece, the main air duct by the variable diameter interconnecting piece respectively with it is described
First lack of gas pipeline and the second lack of gas piping connection；
The main air duct is connect by the first lack of gas pipeline with the coal slurry drying-machine, and the main air duct passes through described
Second lack of gas pipeline is connect with the dust-extraction unit, and the multistage heat exchange equipment is all set in the main air duct.
Coal slime provided by the invention dries the exhaust heat stepped recycling system of lack of gas, comprising: coal slurry drying-machine, lack of gas wind
Road, heat-exchange system and fresh air duct；It include multilevel heat exchanger by heat-exchange system, multilevel heat exchanger is set in turn in weary
Inside gas air duct, coal slurry drying-machine is connected to lack of gas air duct, so that the high temperature lack of gas exported through coal slurry drying-machine successively pass through excessively
Grade heat exchange equipment exchanges heat, and realizes step and recycles coal slime drying lack of gas waste heat, maximum high efficiente callback waste heat；
It alleviates coal slurry drying-machine thermal energy existing in the prior art and wastes serious technical problem, realize system comprehensive energy efficiency height,
Mass energy has been saved, integrated operation expense is low, and it is environmentally friendly, the pollution to environment can be effectively reduced, after popularization and use
Economic benefit and social benefit are prominent.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the overall structure signal that coal slime provided in an embodiment of the present invention dries the exhaust heat stepped recycling system of lack of gas
Figure；
Fig. 2 is the valve distributed architecture that coal slime provided in an embodiment of the present invention dries the exhaust heat stepped recycling system of lack of gas
Schematic diagram；
Fig. 3 is the partial structurtes signal that coal slime provided in an embodiment of the present invention dries the exhaust heat stepped recycling system of lack of gas
Figure.
Icon: 100- coal slurry drying-machine；200- lack of gas air duct；201- main air duct；202- the first lack of gas pipeline；203- second
Lack of gas pipeline；204- variable diameter interconnecting piece；300- heat-exchange system；301- first order air-water heat exchanger；The second level 302- gas-gas heat exchange
Device；303- third level air-water heat exchanger；400- fresh air duct；500- fresh-air fan；The ground 600- heating equipment；The underground 700- into
Blower structure；800- well head heat exchanger；900- refrigeration unit；110- cooling tower；120- heating device；130- dust-extraction unit；140-
Discharge drum；150- excessive fan；The first valve group of 10-；11- first branch valve；12- second branch valve；13- third bypass valve
Door；The 4th branch road valve of 14-；The second valve group of 20-；The 5th branch road valve of 21-；The 6th branch road valve of 22-；30- third valve；
The 4th valve group of 40-；The 7th branch road valve of 41-；The 8th branch road valve of 42-；The 5th valve of 50-；The 6th valve of 60-；The 7th valve of 70-
Door；The 8th valve of 80-.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
Applying example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Since there is the heating demand of surface structures in coal mining enterprise in winter, there are equipment heating demands (to guarantee in winter
Into 2 DEG C of air themperature or more of well head)；And there is bath hot water demand for heat in whole year, there is the demand of refrigeration cool-down in summer,
The demand that mine has full blast amount to cool down at well head in summer, if moreover the air inlet of coal slurry drying-machine 100 can obtain preheating can also
To save the steam consumption quantity of coal slurry drying-machine 100；According to heat demand, required heat source temperature is also not quite similar, in order to most
The recycling dryer lack of gas energy of limits, improves the comprehensive energy efficiency ratio of system, and it is weary to present embodiments provide a kind of coal slime drying
The exhaust heat stepped recycling system of gas, to realize that the step for coal slime drying lack of gas waste heat recycles.
As shown in Figure 1-Figure 3, a kind of coal slime provided in this embodiment dries the exhaust heat stepped recycling system of lack of gas, packet
Include: coal slurry drying-machine 100, lack of gas air duct 200 and 300 heat-exchange system 300 of heat-exchange system include multilevel heat exchanger, and multistage is changed
Hot equipment is set in turn in inside lack of gas air duct 200, and coal slurry drying-machine 100 is connected to lack of gas air duct 200, so as to dry through coal slime
The high temperature lack of gas that machine 100 exports successively pass through multilevel heat exchanger and exchange heat；Multilevel heat exchanger with outside for making respectively
It is connected to end.
In preferred embodiments of the present invention, the wherein level-one heat exchange equipment of multilevel heat exchanger passes through fresh air duct 400
It is connected to coal slurry drying-machine 100, for the fresh air after heating to be delivered in coal slurry drying-machine 100.
Wherein, the lack of gas of coal slurry drying-machine 100 can be delivered in lack of gas air duct 200, by by multilevel heat exchanger successively
It is set in lack of gas air duct 200, and every level-one heat exchange equipment can be changed with the lack of gas waste heat of coal slurry drying-machine 100
Heat can be realized step by multilevel heat exchanger and recycle coal slime drying lack of gas waste heat, finally after multi-stage heat exchanger
Coal slime drying lack of gas can be emitted into the external world by following discharge drums 140.
In order to guarantee that if the air inlet of coal slurry drying-machine 100 can be preheated, so as to save the steaming of coal slurry drying-machine 100
Steam consumption is connected with fresh air duct 400 by any level-one heat exchange equipment in multilevel heat exchanger, wherein this grade of heat exchange equipment
The fresh air that external environment can be absorbed by the way that the fresh air of absorption is carried out waste heat using lack of gas waste heat, and will add
Fresh air after heat is delivered to the import of coal slurry drying-machine 100 by fresh air duct 400 so that coal slurry drying-machine 100 into
If wind can be preheated, the utilization again of waste heat is realized, saves the steam consumption quantity of coal slurry drying-machine 100.
It further include dust-extraction unit 130 and discharge drum 140 in preferred embodiments of the present invention；Lack of gas air duct 200 is far from coal
One end of mud dryer 100 is connect with dust-extraction unit 130, and 130 outlet end of dust-extraction unit is connect with discharge drum 140, and dedusting fills
It sets and is provided with excessive fan 150 between 130 and lack of gas air duct 200, for the lack of gas after exchanging heat after dust-extraction unit 130
It is discharged through discharge drum 140.
In the present embodiment, the lack of gas of coal slurry drying-machine 100 after the multilevel heat exchanger heat exchange in lack of gas air duct 200,
Waste heat in lack of gas has carried out making full use of for step, and the lack of gas of low temperature are finally first passed around dust-extraction unit 130 and are dusted,
Lack of gas after completing dedusting are finally emitted into the external world by discharge drum 140 under the power drive of excessive fan 150, complete lack of gas
UTILIZATION OF VESIDUAL HEAT IN.
Dust-extraction unit 130 is commonly called as deduster, is the device for removing or reducing fly ash content in flue gas, dust-extraction unit 130
Type, which can be divided into biology, to be received film dust-arrest device, cloud and mist dust-arrest device, cloud and mist dust-arrest device, bag-type dust collector 130, whirlwind and removes
Dirt device 130, wet dust separater 130, electrostatic precipitator 130 and desulfation dust-extraction device 130, since dust-extraction unit 130 belongs to
In existing equipment, will not be described in great detail herein.
For coal mine use environment, coal slurry drying-machine 100 uses rotary coal slurry drying-machine 100, due to rotary coal slime
Dryer 100 is existing equipment, be will not be described in great detail herein.
In preferred embodiments of the present invention, lack of gas air duct 200 includes main air duct 201, the first lack of gas pipeline 202 and second
Lack of gas pipeline 203；The internal diameter of main air duct 201 be respectively greater than the first lack of gas pipeline 202 internal diameter and the second lack of gas pipeline 203 it is interior
Diameter, the both ends of main air duct 201 are provided with variable diameter interconnecting piece 204, and main air duct 201 is by variable diameter interconnecting piece 204 respectively with first
Lack of gas pipeline 202 and the connection of the second lack of gas pipeline 203；Main air duct 201 passes through the first lack of gas pipeline 202 and coal slurry drying-machine 100
Connection, main air duct 201 is connect by the second lack of gas pipeline 203 with dust-extraction unit 130, and multilevel heat exchanger is all set in
In main air duct 201.
In order to guarantee that multilevel heat exchanger can be placed in completely in lack of gas air duct 200, by being provided with main air duct 201,
So that multilevel heat exchanger can be set in main air duct 201, in order to enable the biggish main air duct 201 of internal diameter can respectively with
Coal slurry drying-machine 100 and dust-extraction unit 130 connect, by be provided with variable diameter interconnecting piece 204 can respectively with the first lack of gas pipeline
202 and second lack of gas pipeline 203 connect, realize the connection of whole pipeline.
Coal slime provided in this embodiment dries the exhaust heat stepped recycling system of lack of gas, comprising: coal slurry drying-machine 100, weary
Gas air duct 200, heat-exchange system 300 and fresh air duct 400；It include multilevel heat exchanger, multi-stage heat exchanger by heat-exchange system 300
Equipment is set in turn in inside lack of gas air duct 200, and coal slurry drying-machine 100 is connected to lack of gas air duct 200, so that through coal slurry drying-machine
The high temperature lack of gas of 100 outputs successively pass through multilevel heat exchanger and exchange heat, and realize step and recycle coal slime drying lack of gas
Waste heat, maximum high efficiente callback waste heat；Further, any level-one heat exchange equipment is dried by fresh air duct 400 and coal slime
Dry machine 100 is connected to, and for the fresh air after heating to be delivered in coal slurry drying-machine 100, realizes lack of gas energy being used for coal slime
The air inlet of dryer 100 preheats, and alleviates the serious technology of 100 thermal energy of coal slurry drying-machine waste existing in the prior art and asks
Topic, it is high to realize system comprehensive energy efficiency, has saved mass energy, and integrated operation expense is low, environmentally friendly, can effectively reduce pair
The pollution of environment, the economic benefit and social benefit after popularization and use are prominent.
On the basis of the above embodiments, further, in preferred embodiments of the present invention, heat-exchange system 300 includes
First order air-water heat exchanger 301, second level gas-gas heat exchanger 302 and third level air-water heat exchanger 303；First order air-water heat exchanger
301, second level gas-gas heat exchanger 302 and third level air-water heat exchanger 303 are all set in lack of gas air duct 200, and first order gas
Water- to-water heat exchanger 301, second level gas-gas heat exchanger 302 and third level air-water heat exchanger 303 are dried along lack of gas air duct 200 close to coal slime
One end to the other end of dry machine 100 is set gradually, so that the high temperature lack of gas that coal slurry drying-machine 100 exports successively pass through first order gas
Water- to-water heat exchanger 301, second level gas-gas heat exchanger 302 and third level air-water heat exchanger 303 exchange heat；Second level gas-gas heat exchanger
302 gas outlet is connected to by fresh air duct 400 with the air inlet of coal slurry drying-machine 100, and is provided in fresh air duct 400 new
Wind blower 500.
Optionally, first order air-water heat exchanger 301 and third level air-water heat exchanger 303 can be adopted as fin tube type and change
Hot device, second level gas-gas heat exchanger 302 can use cross-counterflow formula, and the material of selection is stainless steel.
Specifically, when in the lower situation of ambient temperature carry out in use, being flowed in first order air-water heat exchanger 301
There is 40 DEG C of heating return water, the temperature for the high temperature lack of gas that coal slurry drying-machine 100 exports is 90 DEG C, by the way that first order air water exchanges heat
40 DEG C of heating return water is flowed in device 301 and 90 DEG C of high temperature lack of gas carry out heat exchange, and it is 65 DEG C or so that heating water temperature, which increases,
Enter to subsequent effect end；Enter second level gas-gas heat exchanger 302 after high temperature exhausted temperature is reduced to 60 DEG C at this time, second
60 DEG C of high temperature lack of gas and outdoor -10 DEG C of fresh air carry out heat exchange in grade gas-gas heat exchanger 302, and fresh air is heated to 55 DEG C of left sides
The right side under the transmitting effect of fresh-air fan 500, enters to coal slurry drying-machine 100 by fresh air duct 400；In second level gas-gas heat exchange
The exhausted temperature that heat is absorbed in device 302 is reduced to 40 DEG C or so, into third level air-water heat exchanger 303, in third level gas
In water- to-water heat exchanger 303,40 DEG C of lack of gas be used for 10 DEG C of equipment return water or so following generation heat exchanges, by equipment
Return water temperature heating is increased to 25 DEG C or so and enters to subsequent effect end；Exhausted temperature after step is substituted most plants reduction
It is discharged to 20-15 DEG C or so by dust-extraction unit 130 and discharge drum 140.
It further include ground heating equipment 600 in preferred embodiments of the present invention；Ground heating equipment 600 and the first order
Air-water heat exchanger 301 connects, and first order air-water heat exchanger 301 is for supplying thermal energy to ground heating equipment 600；And the first order
The first valve group 10 is provided between air-water heat exchanger 301 and ground heating equipment 600.
Wherein, ground heating equipment 600 can for the building with low temperature end heat dissipation equipment and with bath water it is secondary plus
The water tank of hot equipment, and the building with low temperature end heat dissipation equipment uses simultaneously with the water tank with bath water second heating device
The relationship of connection；In addition, when increasing other ground heating equipment 600, it only need to be successively using form in parallel.
In the present embodiment, the first valve group 10 includes first branch valve 11, second branch valve 12, third branch road valve 13
With the 4th branch road valve 14；When heating return water of the first order air-water heat exchanger 301 after heat exchange can pass through first branch valve
11 and second branch valve 12 enter ground heating equipment 600, pass through for ground heating equipment 600 heat after heating return
Water can pass sequentially through third branch road valve 13 and the 4th branch road valve 14 returns to first order air-water heat exchanger 301；Wherein, first
Road valve 11 and third branch road valve 13 are used to control heating return water and enter to the logical of the water tank with bath water second heating device
Road or disconnection, first branch valve 11, second branch valve 12, third branch road valve 13 and the 4th branch road valve 14 are for common
Control heating return water is entered to the building access of low temperature end heat dissipation equipment or disconnection.
It further include underground air inlet mechanism 700 and well head heat exchanger 800 in preferred embodiments of the present invention；Well head heat exchange
Device 800 is connect with third level air-water heat exchanger 303, and third level air-water heat exchanger 303 can be changed with well head heat exchanger 800
Heat；And the second valve group 20 is provided between third level air-water heat exchanger 303 and well head heat exchanger 800；Well head heat exchanger 800 is arranged
In in underground air inlet mechanism 700, well head heat exchanger 800 is used to exchange heat with the air entered under mine.
Since temperature of the mine for the air of entrance has temperature requirements, specifically, into the air temperature range of well head
It is 2 DEG C -18 DEG C；Wherein, when air themperature is higher in external environment, well head heat exchanger 800 can cool down the sky in external environment
Temperature degree, it is cooling after well head air temperature range be in 2 DEG C or more and 18 DEG C hereinafter, to work as air themperature in external environment lower
When, well head heat exchanger 800 understands the air themperature in heat external environment, and well head air temperature range can also be in 2 DEG C after heating
Above and 18 DEG C or less.
Optionally, well head heat exchanger 800 can be surface air cooler or spray-type air cooler.
Underground air inlet mechanism 700 includes heapstead and downcast；Heapstead is connected to downcast, and 800, well head heat exchanger
In in heapstead, so that the air after heating in heapstead enters under mine.
In the present embodiment, when air themperature is lower in external environment, in the meeting heat external environment of well head heat exchanger 800
Air themperature, specifically, in third level air-water heat exchanger 303,40 DEG C of lack of gas be used for following equipment return water 10
DEG C or so occur heat exchange, by equipment return water temperature heating be increased to 25 DEG C or so enter well head heat exchangers 800, well head changes
25 DEG C of recirculated water and -10 DEG C of outdoor fresh air progress heat exchange, are heated to 15 DEG C or so sends outdoor fresh air into hot device 800
In heapstead, the air by being heated to 15 DEG C in heapstead, which is mixed with -10 DEG C of air in part to 2 DEG C or more, enters air inlet
Well.
Wherein, the second valve group 20 includes the 5th branch road valve 21 and the 6th branch road valve 22, for controlling third level air water
The flow media of heat exchanger 303 enters to access or the disconnection of well head heat exchanger 800.
It further include refrigeration unit 900 in preferred embodiments of the present invention；Refrigeration unit 900 and first order air water exchange heat
Device 301 connects, and first order air-water heat exchanger 301 is for supplying thermal energy to refrigeration unit 900, so that refrigeration unit 900 passes through
Thermal energy freezes；Third valve 30 is provided between first order air-water heat exchanger 301 and refrigeration unit 900.
Refrigeration unit 900 includes: evaporator, condenser, generator and absorber, and optionally, refrigeration unit 900 uses bromine
Change lithium-absorbing formula refrigeration machine, specific structure is identical as refrigeration (heat pump) set structure in the prior art, will not be described in great detail herein.
Preferably, refrigeration unit 900 uses lithium-bromide absorption-type refrigerating machine, lithium bromide refrigerator, that is, suction-type lithium bromide system
Cold is working medium with lithium bromide water solution, and wherein water is refrigerant, and lithium bromide is absorbent；Lithium-bromide absorption-type refrigerating machine because
It is refrigerant with water, evaporating temperature can only be used to the cold water of the apparatus of air conditioning and preparation of the production process at 0 DEG C or more, this
Kind refrigeration machine can use the hot water of low pressure water vapor or 75 DEG C or more as heat source；Therefore, refrigeration unit 900 can pass through the first gas
Water- to-water heat exchanger absorbs the heating return water of the first air-water heat exchanger of waste-heat in lack of gas, by the way that heating return water is increased to 85 DEG C of left sides
The right side, and then refrigeration unit 900 can absorb thermal energy and freeze.
Wherein, the heating return water that third valve 30 is used to control 301 internal flow of first order air-water heat exchanger enters to system
The access of cold group 900 or disconnection.
In preferred embodiments of the present invention, well head heat exchanger 800 is connect with refrigeration unit 900, and refrigeration unit 900 can
The air entered under mine by 800 Duis of well head heat exchanger cools down；And between well head heat exchanger 800 and refrigeration unit 900
It is provided with the 4th valve group 40.
In the present embodiment, when air themperature is higher in external environment, well head heat exchanger 800 can be cooled down in external environment
Air themperature, specifically, 7 DEG C of chilled waters that the evaporator of refrigeration unit 900 comes out enter well head heat exchanger 800, change in well head
In hot device 800,7 DEG C of chilled waters and outdoor air carry out heat exchange temperature to increase being 12 DEG C, while by outdoor air from 35 DEG C of left sides
The right side is cooled to 18 DEG C, into heapstead and downcast.
Wherein, the 4th valve group 40 includes the 7th branch road valve 41 and the 8th branch road valve 42, for controlling refrigeration unit 900
Flow media enter to access or the disconnection of well head heat exchanger 800.
It further include cooling tower 110 and heating device 120 in preferred embodiments of the present invention；Refrigeration unit 900 is by adding
Thermal 120 is connect with the entrance of cooling tower 110, and the outlet of cooling tower 110 is connect with refrigeration unit 900, so that refrigeration unit
900, heating device 120 forms circulation with cooling tower 110 and is connected to；The 5th is provided between refrigeration unit 900 and heating device 120
Valve 50 is provided with the 6th valve 60 between heating device 120 and cooling tower 110.
Preferably, heating device 120 is the water tank with bath water second heating device in above-described embodiment, specifically, system
40 DEG C or so of the cooling water that the output flow of the condenser of cold group 900 comes out, by bath water heating in heating device 120
To 38 DEG C or so, into cooling tower 110, it is cooled to 32 DEG C in cooling tower 110 and is back to refrigeration unit 900 again below
The import of absorber.
Wherein, the flow media that the 5th valve 50 is used to control the flowing of refrigeration unit 900 enters to the logical of heating device 120
Road or disconnection；The flow media that 6th valve 60 is used to control by the flowing of refrigeration unit 900 of heating device 120 enters to cold
But the access of tower 110 or disconnection.
In preferred embodiments of the present invention, first order air-water heat exchanger 301 is connect with third level air-water heat exchanger 303,
And the 7th valve 70 is provided between first order air-water heat exchanger 301 and third level air-water heat exchanger 303；The heat exchange of third level air water
Device 303 is connect with refrigeration unit 900, is situated between for receiving the flowing after first order air-water heat exchanger 301 exchanges heat with refrigeration unit 900
Matter, and the 8th valve 80 is provided between third level air-water heat exchanger 303 and refrigeration unit 900.
Specifically, when air themperature is higher in external environment (by taking summer as an example), in third level air-water heat exchanger 303
In, circulating water temperature heating is increased to 70 DEG C or so, 70 DEG C by 75 DEG C of lack of gas and 55 DEG C or so of recirculated water generation heat exchange
Recirculated water series connection enter first order air-water heat exchanger 301, in first order air-water heat exchanger 301,90 DEG C of lack of gas with 70 DEG C
Recirculated water occur heat exchange, by circulating water temperature heating be increased to 85 DEG C or so, exhausted temperature is reduced to 80 DEG C or so, lack of gas
After entering to the heat exchange of second level gas-gas heat exchanger 302, it can be down to after 75 DEG C and be changed again with third level air-water heat exchanger 303
Heat, third level air-water heat exchanger 303 can be received after first order air-water heat exchanger 301 enters to refrigeration unit 900 and be flowed out at this time
Recirculated water, substantially 55 DEG C of recirculated water at this time repeat above-mentioned heat exchange, complete to circulate.
It should be noted that when external environmental air temperature is lower (such as winter), being opened at this time in the present embodiment
Valve be respectively as follows: first branch valve 11, second branch valve 12, third branch road valve 13, the 4th branch road valve the 14, the 5th
Branch road valve 21 and the 6th branch road valve 22；The valve of closing is respectively as follows: the 7th branch road valve 41, the 8th branch road valve 42,
Three valves 30, the 5th valve 50, the 6th valve 60, the 7th valve 70 and the 8th valve 80.
When external environmental air temperature is higher (such as summer), the valve opened at this time is respectively as follows: the 7th bypass valve
The 41, the 8th branch road valve 42 of door, third valve 30, the 5th valve 50, the 6th valve 60, the 7th valve 70 and the 8th valve 80；
The valve of closing be respectively as follows: first branch valve 11, second branch valve 12, third branch road valve 13, the 4th branch road valve 14,
5th branch road valve 21 and the 6th branch road valve 22.
The coal slime that this programme provides dries the exhaust heat stepped recycling system of lack of gas, realizes 90 DEG C of coal slurry drying-machine
The cascade utilization of 100 lack of gas waste heat energy, winter obtain the heat source of zero cost, meet equipment demand, ground heat supply is set
The demand entered the wind for 600 and self-preheating；While summer meets well head cooling demand using waste heat progress refrigeration cool-down, meet
Simultaneously, in system the link of all energy exchanges is not necessarily to disappear for the demand of bath hot water heating and the demand of itself air inlet preheating
Consuming electric power reduces the consumption of electric energy to greatest extent, and system capacity utilization rate is high, and energy conservation and environmental protection, overall economic efficiency is significant, fits
It closes and promotes the use of.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of coal slime dries the exhaust heat stepped recycling system of lack of gas characterized by comprising coal slurry drying-machine, lack of gas wind
Road, heat-exchange system and fresh air duct；
The heat-exchange system includes multilevel heat exchanger, and the multistage heat exchange equipment is set in turn in the lack of gas air duct
Portion, the coal slurry drying-machine are connected to the lack of gas air duct, so that the high temperature lack of gas exported through the coal slurry drying-machine successively pass through
The multistage heat exchange equipment is crossed to exchange heat；The multistage heat exchange equipment with external action end for being connected to respectively；
The wherein level-one heat exchange equipment of the multistage heat exchange equipment is connected to by the fresh air duct with the coal slurry drying-machine, is used
It is delivered in the coal slurry drying-machine in by the fresh air after heating.
2. coal slime according to claim 1 dries the exhaust heat stepped recycling system of lack of gas, which is characterized in that the heat exchange
System includes first order air-water heat exchanger, second level gas-gas heat exchanger and third level air-water heat exchanger；
The first order air-water heat exchanger, second level gas-gas heat exchanger and third level air-water heat exchanger are all set in the lack of gas wind
In road, and the first order air-water heat exchanger, second level gas-gas heat exchanger and third level air-water heat exchanger are along the lack of gas wind
Road is set gradually close to one end of the coal slurry drying-machine to the other end, and the high temperature lack of gas of the coal slurry drying-machine output successively pass through
First order air-water heat exchanger, second level gas-gas heat exchanger and third level air-water heat exchanger is crossed to exchange heat；
The gas outlet of the second level gas-gas heat exchanger is connected to by the fresh air duct with the air inlet of the coal slurry drying-machine,
And fresh-air fan is provided in the fresh air duct.
3. coal slime according to claim 2 dries the exhaust heat stepped recycling system of lack of gas, which is characterized in that further include ground
Face heating equipment；
The ground heating equipment is connect with the first order air-water heat exchanger, and the first order air-water heat exchanger is used for thermal energy
It supplies to the ground heating equipment；And first is provided between the first order air-water heat exchanger and the ground heating equipment
Valve group.
4. coal slime according to claim 2 dries the exhaust heat stepped recycling system of lack of gas, which is characterized in that further include well
Lower air inlet mechanism and well head heat exchanger；
The well head heat exchanger is connect with the third level air-water heat exchanger, and the third level air-water heat exchanger can be with the well
Mouth heat exchanger exchanges heat；And the second valve group is provided between the third level air-water heat exchanger and the well head heat exchanger；
The well head heat exchanger is set in the underground air inlet mechanism, and the well head heat exchanger is used for and the sky under entrance mine
Gas exchanges heat.
5. coal slime according to claim 4 dries the exhaust heat stepped recycling system of lack of gas, which is characterized in that further include system
Cold group；
The refrigeration unit is connect with the first order air-water heat exchanger, and the first order air-water heat exchanger is for supplying thermal energy
To the refrigeration unit；Third valve is provided between the first order air-water heat exchanger and the refrigeration unit.
6. coal slime according to claim 5 dries the exhaust heat stepped recycling system of lack of gas, which is characterized in that the well head
Heat exchanger is connect with the refrigeration unit, and the refrigeration unit can be by the well head heat exchanger to the air entered under mine
It is cooled down；And the 4th valve group is provided between the well head heat exchanger and the refrigeration unit.
7. coal slime according to claim 6 dries the exhaust heat stepped recycling system of lack of gas, which is characterized in that further include cold
But tower and heating device；
The refrigeration unit is connect by the heating device with the entrance of the cooling tower, the outlet of the cooling tower with it is described
Refrigeration unit connection is connected to so that the refrigeration unit, the heating device form circulation with the cooling tower；
The 5th valve is provided between the refrigeration unit and the heating device, between the heating device and the cooling tower
It is provided with the 6th valve.
8. coal slime according to claim 7 dries the exhaust heat stepped recycling system of lack of gas, which is characterized in that described first
Grade air-water heat exchanger is connect with the third level air-water heat exchanger, and the first order air-water heat exchanger and the third level air water
The 7th valve is provided between heat exchanger；
The third level air-water heat exchanger is connect with the refrigeration unit, for receive the first order air-water heat exchanger with it is described
Flow media after refrigeration unit heat exchange, and the 8th valve is provided between the third level air-water heat exchanger and the refrigeration unit
Door.
9. coal slime according to claim 1-8 dries the exhaust heat stepped recycling system of lack of gas, which is characterized in that
It further include dust-extraction unit and discharge drum；
The one end of the lack of gas air duct far from the coal slurry drying-machine is connect with the dust-extraction unit, the dust-extraction unit outlet end
It is connect with the discharge drum, and is provided with excessive fan between the dust-extraction unit and the lack of gas air duct.
10. coal slime according to claim 9 dries the exhaust heat stepped recycling system of lack of gas, which is characterized in that described weary
Gas air duct includes main air duct, the first lack of gas pipeline and the second lack of gas pipeline；
The internal diameter of the main air duct is respectively greater than the internal diameter of the first lack of gas pipeline and the internal diameter of the second lack of gas pipeline, institute
The both ends for stating main air duct are provided with variable diameter interconnecting piece, and the main air duct is weary with described first respectively by the variable diameter interconnecting piece
Air pipe and the second lack of gas piping connection；
The main air duct is connect by the first lack of gas pipeline with the coal slurry drying-machine, and the main air duct passes through described second
Lack of gas pipeline is connect with the dust-extraction unit, and the multistage heat exchange equipment is all set in the main air duct.
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| CN201910514008.2A CN110131997A (en) | 2019-06-13 | 2019-06-13 | Coal slime dries the exhaust heat stepped recycling system of lack of gas |
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| CN201910514008.2A CN110131997A (en) | 2019-06-13 | 2019-06-13 | Coal slime dries the exhaust heat stepped recycling system of lack of gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111380354A (en) * | 2020-04-14 | 2020-07-07 | 磐石自动化系统（深圳）有限公司 | Dryer tail gas circulation system |
| CN111536773A (en) * | 2020-04-17 | 2020-08-14 | 盐城工学院 | Automatic heat preservation device for waste heat recovery of coal slime dryer and use method thereof |
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