CN105423731A - Coal slurry dewatering and drying device and method - Google Patents

Coal slurry dewatering and drying device and method Download PDF

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Publication number
CN105423731A
CN105423731A CN201510852864.0A CN201510852864A CN105423731A CN 105423731 A CN105423731 A CN 105423731A CN 201510852864 A CN201510852864 A CN 201510852864A CN 105423731 A CN105423731 A CN 105423731A
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China
Prior art keywords
coal slime
conveyer belt
baking room
coal
heat
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CN201510852864.0A
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Chinese (zh)
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CN105423731B (en
Inventor
蒋冠珞
李湧
黄胜龙
黄云菲
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Wuhan Han Yuan New Forms Of Energy Environmental Protection Technology Co Ltd
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Wuhan Han Yuan New Forms Of Energy Environmental Protection Technology Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/02Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
    • F26B17/04Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces the belts being all horizontal or slightly inclined
    • 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
    • F26B21/004Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001Handling, e.g. loading or unloading arrangements
    • F26B25/002Handling, e.g. loading or unloading arrangements for bulk goods
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/22Controlling the drying process in dependence on liquid content of solid materials or objects
    • 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
    • F26B2200/08Granular materials

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

The invention discloses a coal slurry dewatering and drying device and method. The device comprises a drying room and a coal slurry conveying device, a warm air machine and a negative pressure fan which are arranged inside the drying room. The coal slurry conveying device comprises a plurality of conveying belts arranged in a zigzag manner from top to bottom. A vibration feeder is arranged above the coal slurry inlet end of the uppermost conveying belt of the coal slurry conveying device. A feeding sealing door is formed in the top of the drying room. A discharging hopper is arranged below the coal slurry outlet end of the bottommost conveying belt of the coal slurry conveying device. A discharging sealing door is formed in the bottom of the drying room. The negative pressure fan and a warm air to atmosphere gate are arranged at the upper portion of the drying room. The hot air machine, a hot water inlet and outlet and the like are arranged at the lower portion of the drying room. The warm air to atmosphere gate is formed in the side wall of the upper portion of the drying room. The invention further discloses the coal slurry dewatering and drying method applied to the device. The device and method have the beneficial effects of saving energy and being environment-friendly, efficient, low in drying temperature, high in speed and efficiency, simple in structure and small in occupied area.

Description

Coal slime dewatering drying plant and method
Technical field
The present invention relates to coal slime drying field, specifically a kind of coal slime dewatering drying plant and method.
Background technology
At present, on production line through the coal slime water content of press filtration be approximately 22%; It is blow over coal slime with the hot blast of 800 degree to make it to dewater that traditional coal slime is dried, and this high-temperature hot-air coal slime drying technology Problems existing having continued to use decades is that dust and pernicious gas are difficult to reach environmental protection standard.
According to the law of thermodynamics, the heat of vaporization of water reduces with the rising of temperature.Specific heat of water holds more much bigger than solid, carrys out vaporize water lose more than gain so reduce heat of vaporization by raising water temperature.
Such as: the heat of vaporization of water is respectively 2366.4KJ/kg, 2295.2KJ/kg and 2258.4KJ/kg when 55 degree, 85 degree and 100 degree, and during this three temperature, the heat of vaporization difference of water is 71.2KJ and 36.8KJ/kg; But it is 126KJ and 63KJ that 1kg water is elevated to 85 and 100 degree of heat differences needed by 55 degree.Visible raising vapourizing temperature reduction reduces heat of vaporization is lost more than gain, and therefore, low-temperature vaporization is more energy-conservation.The particularly important is: dry coal slime, our object is partial dehydration (such as dewater 7-8%) instead of dries completely, therefore raising temperature wastes very large heat beyond doubt and goes to heat all moisture coal slime, and this is obviously wrong!
Consider from the angle of environmental protection, low-temperature vaporization is irreplaceable for the environmental benefit that the material containing harmful components brings.
Existing low temperature drying technology is all adopt source heat pump heat (55-65 degree) dry.The efficiency ratio of heat pump is very high, and generally can reach 360-560% is a kind of novel energy.But it is for coal slime dewatering, only limited by 55 degree of its dewatering efficiencies of hot blast.
Summary of the invention
The object of the invention is the deficiency existed to solve above-mentioned background technology, proposing the coal slime dewatering drying plant that the while that a kind of bake out temperature being low, speed is fast, efficiency is high, structure is simple, floor space is little.
In order to realize above object, a kind of coal slime dewatering drying plant provided by the invention, comprise baking room and be located at the coal slime conveying device in baking room, it is characterized in that: described coal slime conveying device comprises multiple from top to bottom in the conveyer belt arranged in a zigzag, one end of described conveyer belt is coal slurry inlet end, the other end of conveyer belt is the coal slime port of export, the coal slime port of export correspondence of described conveyer belt be arranged on its below adjacent conveyer belt coal slurry inlet end above, and the upright position of the coal slurry inlet end of described conveyer belt is higher than the coal slime port of export of conveyer belt, the overall zigzag coal slime conveying device that formation one is complete on the vertical plane of multiple conveyer belt, vibration charger is provided with above the coal slurry inlet end of the conveyer belt of the described coal slime conveying device the superiors, the position of described baking room top correspondence vibration charger offers feeding seal door, funnel is provided with out below the coal slime port of export of the undermost conveyer belt of described coal slime conveying device, bottom described baking room corresponding go out the position of funnel offer discharging hermatic door, the top of described baking room is provided with negative-pressure air fan, sidewall offers hot blast and leads to large air lock door, and the bottom of baking room is provided with air-heater.
As preferred version of the present invention, described conveyer belt comprises conveyer belt heating part and feed drive part, conveyer belt heating part is the long box of a rectangular tight, the both sides at its both ends are respectively equipped with the import and export passing in and out fluid and are connected with heat-exchanger pump, and the upper surface of long box is that heat-conducting plate conducts heat to coal slime; Feed drive part is provided with unidirectional thrust unit above long box, thrust unit comprises many push rods, many transverse baffles are interval with along its length on long box, transverse baffle is evenly distributed with the pilot hole of the circular hole identical with the number of push rod as push rod, every root push rod evenly arranges pawling of multiple one-directional rotation along its length, and one end of described push rod connects push rod cylinder.
Further, the interior corner of described conveyer belt has been horizontally disposed with wind deflector, and be provided with gap between one end of described wind deflector and the interior turning of conveyer belt, the other end of wind deflector is fixed on the inwall of baking room.
Further, hygrometer and thermometer is respectively equipped with near feeding seal door place and near discharging hermatic door place in described baking room.
Again further, thermometer is provided with in the long box of described conveyer belt.
Be applied to the coal slime dewatering furnace drying method of the said equipment, it is characterized in that, comprise the steps:
Step 1: open feeding seal door, coal slime to be dried is poured into vibration charger from feeding seal door, coal slime is evenly dropped on the conveyer belt of the superiors by vibration charger, coal slime moves from coal slurry inlet end to the coal slime port of export until fall to the adjacent conveyer belt of lower floor, coal slime to be dried closes vibration charger and feeding seal door after being covered with all conveyer belts
Step 2: start air-heater and heat-exchanger pump, open hot blast and lead to large air lock door, air in baking room is heated, conveyer belt is heated simultaneously, hot blast is blown into from the bottom of baking room, led by wind deflector, against conveyer belt in upwards flowing in a zigzag, heating, drying is carried out to the surface of coal slime, high temperature fluid heats it by importing and exporting the long box of injection by heat pump simultaneously, and heat is passed to bottom coal slime by long box, and such coal slime is subject to the evaporation of dual-heated intensification moisture, last hot blast leads to large air lock door loss with malaria from hot blast
Step 3: when baking room temperature or coal slime temperature are close to hot blast temperature, can think that steam in baking room is close to saturation state, at this moment, closedown air-heater and hot blast lead to large air lock door, open negative-pressure air fan and extract damp-heat air in baking room, continue 180-300 second, be 0.4-0.8 atmospheric pressure to baking room internal gas pressure, the water content of coal slime is constantly tested in this process, if coal slime water content still can not reach requirement after 300 seconds, stop negative-pressure air fan immediately and repeat step 2 and step 3 until the water content of coal slime reaches requirement
Step 4: after the water content of coal slime reaches requirement, closes negative-pressure air fan, air-heater and heat-exchanger pump, opens discharging hermatic door, starting conveyer belt, making coal slime from the coal slime port of export landing of undermost conveyer belt to going out in funnel, collects the coal slime of having dried.
Further, also comprise step 5: spliced mutually by multiple baking room, repeatedly repeat step 1 to step 3 until coal slime water content reaches requirement.
Baking room internal gas pressure is down to a below atmospheric pressure by using negative-pressure air fan by the present invention, greatly accelerates the evaporation rate of moisture under equal temperature.Meanwhile, increase the evaporation surface of coal slime moisture content thus shorten drying time the zigzag arrangement mode of conveyer belt in solid space reduces occupation area of equipment widely, improve drying effect.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the long box structural representation of conveyer belt.
Fig. 3 is for pawling and push rod connection diagram.
Fig. 4 is the stereogram of Fig. 3.
Fig. 5 is that push rod stretches out using state figure.
Fig. 6 is pusher retracted using state figure.
Fig. 7 is wind deflector action principle figure.
In figure: baking room 1, feeding seal door 1.1, discharging hermatic door 1.2, hot blast lead to large air lock door 1.3, conveyer belt 2, long box 2.1, push rod 2.2, transverse baffle 2.3, circular hole 2.4, pawl 2.5, push rod cylinder 2.6, import and export 2.7, clamping plate 2.8 of pawling, turning cylinder 2.9 of pawling, vibration charger 3, go out funnel 4, negative-pressure air fan 5, air-heater 6, wind deflector 7, heat-exchanger pump 8.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment: a kind of coal slime dewatering drying plant as shown in Figure 1, the coal slime conveying device comprising baking room 1 and be located in baking room 1, described coal slime conveying device comprises multiple from top to bottom in the conveyer belt 2 arranged in a zigzag, one end of described conveyer belt 2 is coal slurry inlet end, the other end of conveyer belt 2 is the coal slime port of export, the coal slime port of export correspondence of described conveyer belt 2 be arranged on its below adjacent conveyer belt 2 coal slurry inlet end above, and the upright position of the coal slurry inlet end of described conveyer belt 2 is higher than the coal slime port of export of conveyer belt 2, multiple conveyer belt 2 entirety forms a complete zigzag coal slime conveying device on the vertical plane, vibration charger 3 is provided with above the coal slurry inlet end of the conveyer belt 2 of the described coal slime conveying device the superiors, the position of described baking room 1 top correspondence vibration charger 3 offers feeding seal door 1.1, funnel 4 is provided with out below the coal slime port of export of the undermost conveyer belt 2 of described coal slime conveying device, bottom described baking room 1 corresponding go out the position of funnel 4 offer discharging hermatic door 1.2, the hot blast that the top of described baking room 1 is provided with negative-pressure air fan 5 and sidewall leads to large air lock door 1.3, and the bottom of baking room 1 is provided with air-heater 6 and heat-exchanger pump.The interior corner of described conveyer belt 2 has been horizontally disposed with wind deflector 7, is provided with gap between one end of described wind deflector 7 and the interior turning of conveyer belt 2, and the other end of wind deflector 7 is fixed on the inwall of baking room 1.Hygrometer and thermometer is respectively equipped with near feeding seal door 1.1 place and near discharging hermatic door 1.2 place in described baking room 1.Thermometer is provided with in the long box 2.1 of described conveyer belt 2.
Described conveyer belt 2 comprises conveyer belt 2 heating part and feed drive part, conveyer belt 2 heating part is the long box 2.1 of a rectangular tight, the both sides at its both ends are respectively equipped with the import and export 2.7 passing in and out fluid and are connected with high temperature fluid gas or liquid thermal source, long box 2.1 upper surface is heat-conducting plate, and object is to transfer heat to coal slime.There is transverse baffle 2.3 described heat-conducting plate upper surface both sides, transverse baffle 2.3 evenly offer multiple for fixing circular hole 2.4.Circular hole 2.4 can be used as being fixed on by conveyer belt 2 around, or for fixing feed drive part.Feed drive part is provided with unidirectional thrust unit above long box 2.1, described unidirectional thrust unit comprises many push rods 2.2, what the below of every root push rod 2.2 evenly arranged multiple one-directional rotation along its length pawls 2.5, the described horizontal both sides of push rod 2.2 are vertically provided with 2.5 clamping plate of pawling, below push rod 2.2, pawling between 2.5 clamping plate of both sides is provided with 2.5 turning cylinders of pawling, described pawl 2.5 top and turning cylinder hinged, described pawl 2.5 the side of the corresponding turning cylinder position of end face be cambered surface, described pawl 2.5 the opposite side of the corresponding turning cylinder position of end face be plane, the bottom of described push rod 2.2 with pawl 2.5 end face fit, one end connecting drive device of described push rod 2.2.The course of work of conveyer belt 2 is: as Fig. 5, and push rod 2.2 stretches out, and because to position-limiting action, the horizontal plane of 2.5 end faces of pawling stops that it rotates, therefore pawls and 2.5 to be kept upright state moving with push rod 2.2, promote material and move together.As Fig. 6, after push rod 2.2 1 strokes terminate, will oppositely retract, now due to the stop of material, pawl 2.5 around 2.5 turning cylinder one-directional rotation of pawling, guide effect is played in the bottom of the cambered surface laminating push rod 2.2 of 2.5 end faces of now pawling, and now material keeps motionless and 2.5 one-directional rotation of pawling.The reciprocating motion of push rod 2.2 makes the material coal slime below this group push rod 2.2 to be pawled and 2.5 moves to discharge end from the feed end of long box 2.1.
The course of work of the present invention is:
Step 1: open feeding seal door 1.1, coal slime to be dried is poured into vibration charger 3 from feeding seal door 1.1, coal slime evenly drops on the conveyer belt 2 of the superiors by vibration charger 3, coal slime moves from coal slurry inlet end to the coal slime port of export until fall to the adjacent conveyer belt of lower floor 2, and coal slime to be dried closes vibration charger 3 and feeding seal door 1.1 after being covered with all conveyer belts 2.
Step 2: start air-heater 6 and heat-exchanger pump 8, open hot blast and lead to large air lock door 1.3, air in baking room 1 is heated, conveyer belt 2 is heated simultaneously, hot blast is blown into from the bottom of baking room 1, led by wind deflector 7, against conveyer belt 2 in upwards flowing in a zigzag, heating, drying is carried out to the surface of coal slime, simultaneously high temperature fluid is injected long box 2.1 by import and export 2.7 and heats it by heat pump 8, heat is passed to bottom coal slime by long box 2.1, such coal slime is subject to the evaporation of dual-heated intensification moisture, last hot blast leads to the loss of large air lock door 1.3 with malaria from hot blast.
Step 3: when baking room 1 temperature or coal slime temperature are close to hot blast temperature, can think that steam in baking room 1 is close to saturation state, at this moment, closedown air-heater 6 and hot blast lead to large air lock door 1.3, open negative-pressure air fan 5 and extract damp-heat air in baking room 1, continue 180-300 second, be 0.4-0.8 atmospheric pressure to baking room 1 internal gas pressure, the water content of continuous test coal slime in this process, if coal slime water content still can not reach requirement after 300 seconds, stops negative-pressure air fan 5 immediately and repeats step 2 and step 3 until the water content of coal slime reaches requirement.
Step 4: after the water content of coal slime reaches requirement, close negative-pressure air fan 5, air-heater 6 and heat-exchanger pump 8, open discharging hermatic door 1.2, starting conveyer belt 2, making coal slime from the coal slime port of export landing of undermost conveyer belt 2 to going out in funnel 4, collect the coal slime of having dried, in coal slime drying course, by the oven dry situation of thermometer and hygrometer Simultaneous Monitoring coal slime, flow rate of hot water in adjustment air-heater 6 temperature and long box 2.1, ensures drying effect in good time.
Step 5: by multiple baking room 1 phase splicing, repeatedly repeats step 1 to step 3 until coal slime water content reaches requirement.
Operation principle of the present invention is:
Research shows that coal slime dewatering process meets Page equation, substantially exponentially, because coal slime composition does not relatively simply have complicated chemistry or the relatively simple physical process of biochemical reaction, uses Page equation
MR=exp (-Kt n) (formula 1)
Just can state enough accurately, in formula 1:
MR represents water content
K, N represent the parameter relevant with drying condition
T represents drying time
Usually, MR can also be expressed as:
M R = M - M e M 0 - M e (formula 2)
In formula 2:
M is the water content in any time wet feed
Me is the equilibrium moisture content in wet feed
M 0for initial moisture content in wet feed.
In the ordinary course of things can with the final water content M of product freplace equilibrium moisture content Me as, therefore formula 2 can be write:
M R = M - M f M 0 - M f (formula 3)
M must be the water content detected in real time.
Dry some similar coal slime at grain and mud, someone did a lot of experimental study and developed Computer Simulation the application of mathematical model in production practices, obtained good effect this respect.The conclusion wherein can used for reference is:
1, page equation can describe aqueous particulate dry run preferably, water content and time exponentially relation.
2, dry run roughly can be divided into raising speed dry, constant rate of drying and 3 stages of falling-rate periods of drying; Falling-rate period is the Main Stage of thin layer drying, in typical exponential curve.
3, the not removed Interstitial Water of mechanical dehydration is mainly removed on raising speed rank, can evaporate the 20%-30% of total moisture.
There is obvious defect and certainly will will step down from the stage of history in existing high temperature coal slurry drying-machine, the exponential curve characteristic of simple low temperature dewatering makes its practicality be under suspicion in environmental protection.The present invention utilizes hot-air seasoning technology, after high-efficiency dehydration in the early stage, transfers negative pressure dehydration at once to, makes overall dewatering efficiency can improve 1 ~ 2 order of magnitude than simple hot-air seasoning.There is fairly obvious economic benefit and practical value.
Consider the general character of exponential curve, simple hot-air seasoning mainly surface evaporation effect, the dewatering efficiency in later stage is very low does not have use value, such as: therefore we consider the link adding a negative pressure dehydration.
The rationale of negative pressure dehydration is:
As 290K<T<500K, exist between water saturation vapour pressure and temperature by the relation of Antonic formula:
Ln (P)=9.3876-3826.36/ (T-45.47) (formula 4)
Corresponding data form also can be found, and when temperature is 25 degree, 50 degree, 75 degree 80 degree and 90 degree, water saturation vapour pressure is respectively: 3.1690kpa, 12.344kpa, 38.543kpa, 47.373kpa and 70kpa.
This just points out us, considers the existing appointed condition in market, even negative pressure reaches 47kpa, temperature at least needs to reach the requirement that 80 degree could meet dewatering speed.It is enough for 70kpa if reach 90 degree!
Therefore our focus is: economic negative pressure generator and raising heat pump output temperature.
The problem that " negative pressure " must solve:
So-called " negative pressure " refers to here lower than an atmospheric pressure (0.1MPa), and the problem that it brings is:
1, the compressive resistance of baking room and corresponding structure problem.Theoretically, when negative pressure reaches 10kpa or following, the pressure that baking room outer wall every square metre will bear 10 tons.For wish large-scale industrial application for, equipment investment will be too high.
2, the negative-pressure air fan reaching 10kpa is vavuum pump type substantially, and cost is high, and efficiency is low is also worthless.If employing half-way house, vacuum cavitations at ~ 50kpa, then can be ripe peripheral pump.Under 50kpa condition of negative pressure, the withstand voltage only 5 tons/square meter of baking room surface level more easily solves.
The present invention adopts the width of baking room 1 to be 8 meters, is highly 4 meters, and thickness is 1.4 meters.The present invention adopts maximum 50kpa negative pressure, and baking room is designed to flat structure, with the welding of 1.5mm general steel plate, large face increases the corresponding maximum 5T/M of support bar 2pressure, outer wall has wrapped up the polyurethane of 4cm.Add the space compact arrangement of upper conveyor belt 2, under 50Kp condition, every square metre of pressure born is 5T/M 2.Most negative-pressure air fan can reach this index, on the thickness direction of baking room, is equipped with and is of a size of 1400mm*40mm*5mm supporting square tube.
" hot blast " adds " negative pressure " dewatering process:
Low temperature heated-air drying is at present very ripe technique, especially in grain, timber, Chinese medicine and vegetables and fruits are fresh-keeping etc.On analyze theoretically, it is dry that simple hot blast is used for coal slime, and the exponential curve characteristic due to drying exists an efficiency (namely economically feasible sex chromosome mosaicism) and is difficult to be accepted by production scene.
Present invention achieves on the basis of heated-air drying, in time increase negative pressure dewatering means, greatly improve the drying efficiency of coal slime.
Compared with prior art, Advantages found of the present invention exists:
1, coal slime is dried under negative pressure cryogenic conditions, and negative pressure reduces the temperature of moisture evaporation, and therefore air-heater is too high without the need to heating, and greatly reduces oven dry cost.
2, dry coal slime under low temperature (about 100 degree) condition, produce dusty gas and Dust Capacity few, environmental protection more.
3, conveyer belt 2 is from top to bottom in arrangement in a zigzag in solid space, under greatly reducing the floor space of equipment on an equal basis, highly shortened the oven dry Distance geometry time increasing coal slime, promotes drying efficiency.
4, dried by hot water heating bottom coal slime, the top of coal slime is dried by Hot-blast Heating, and effect simultaneously promotes drying efficiency.
5, baking room 1 integral sealing, add by means of only feeding seal door 1.1 and discharging hermatic door 1.2 and collect coal slime, overall tightness is good, at utmost reduces the loss of heat, more energy-conservation.
The above is only preferred embodiment of the present invention, not does any pro forma restriction to structure of the present invention.Every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of technical scheme of the present invention.

Claims (7)

1. a coal slime dewatering drying plant, the coal slime conveying device comprising baking room (1) and be located in baking room (1), it is characterized in that: described coal slime conveying device comprises multiple from top to bottom in the conveyer belt (2) arranged in a zigzag, one end of described conveyer belt (2) is coal slurry inlet end, the other end of conveyer belt (2) is the coal slime port of export, the coal slime port of export correspondence of described conveyer belt (2) be arranged on its below adjacent conveyer belt (2) coal slurry inlet end above, and the upright position of the coal slurry inlet end of described conveyer belt (2) is higher than the coal slime port of export of conveyer belt (2), the overall zigzag coal slime conveying device that formation one is complete on the vertical plane of multiple conveyer belt (2), vibration charger (3) is provided with above the coal slurry inlet end of the conveyer belt (2) of the described coal slime conveying device the superiors, the position at described baking room (1) top correspondence vibration charger (3) offers feeding seal door (1.1), funnel (4) is provided with out below the coal slime port of export of the undermost conveyer belt of described coal slime conveying device (2), the position that described baking room (1) bottom correspondence goes out funnel (4) offers discharging hermatic door (1.2), the top of described baking room (1) is provided with negative-pressure air fan (5), sidewall offers hot blast and leads to large air lock door (1.3), and the bottom of baking room (1) is provided with air-heater (6).
2. coal slime dewatering drying plant according to claim 1, it is characterized in that: described conveyer belt (2) comprises conveyer belt heating part and feed drive part, conveyer belt heating part is the long box (2.1) of a rectangular tight, the both sides at its both ends are respectively equipped with the import and export (2.7) passing in and out fluid and are connected with heat-exchanger pump (8), and the upper surface of long box (2.1) is that heat-conducting plate conducts heat to coal slime, feed drive part is provided with unidirectional thrust unit in long box (2.1) top, thrust unit comprises many push rods (2.2), many transverse baffles (2.3) are interval with along its length on long box (2.1), transverse baffle (2.3) is evenly distributed with the pilot hole of the circular hole (2.4) identical with the number of push rod (2.2) as push rod (2.2), every root push rod (2.2) is evenly arranged along its length pawl (2.5) of multiple one-directional rotation, one end of described push rod (2.2) connects push rod cylinder (2.6).
3. coal slime dewatering drying plant according to claim 1, it is characterized in that: the interior corner of described conveyer belt (2) has been horizontally disposed with wind deflector (7), be provided with gap between one end of described wind deflector (7) and the interior turning of conveyer belt (2), the other end of wind deflector (7) is fixed on the inwall of baking room (1).
4. coal slime dewatering drying plant according to claim 1, is characterized in that: be respectively equipped with hygrometer and thermometer near feeding seal door (1.1) place and near discharging hermatic door (1.2) place in described baking room (1).
5. coal slime dewatering drying plant according to claim 2, is characterized in that: be provided with thermometer in the long box (2.1) of described conveyer belt (2).
6. be applied to a coal slime dewatering furnace drying method for equipment described in claim 1, it is characterized in that, comprise the steps:
Step 1: open feeding seal door (1.1), coal slime to be dried is poured into vibration charger (3) from feeding seal door (1.1), coal slime evenly drops on the conveyer belt (2) of the superiors by vibration charger (3), coal slime moves from coal slurry inlet end to the coal slime port of export until fall to the adjacent conveyer belt of lower floor, coal slime to be dried is covered with all conveyer belts (2) and closes vibration charger (3) and feeding seal door (1.1) afterwards
Step 2: start air-heater (6) and heat-exchanger pump (8), open hot blast and lead to large air lock door (1.3), baking room (1) interior air is heated, conveyer belt (2) is heated simultaneously, hot blast is blown into from the bottom of baking room (1), led by wind deflector (7), against conveyer belt (2) in upwards flowing in a zigzag, heating, drying is carried out to the surface of coal slime, simultaneously high temperature fluid is injected long box (2.1) heat it by importing and exporting (2.7) by heat pump (8), heat is passed to bottom coal slime by long box (2.1), such coal slime is subject to the evaporation of dual-heated intensification moisture, last hot blast leads to large air lock door (1.3) loss with malaria from hot blast,
Step 3: when baking room (1) temperature or coal slime temperature are close to hot blast temperature, can think that steam in baking room (1) is close to saturation state, at this moment, closedown air-heater (6) and hot blast lead to large air lock door (1.3), open negative-pressure air fan (5) and extract baking room (1) interior damp-heat air, continue 180-300 second, be 0.4-0.8 atmospheric pressure to baking room (1) internal gas pressure, the water content of coal slime is constantly tested in this process, if coal slime water content still can not reach requirement after 300 seconds, stop negative-pressure air fan (5) immediately and repeat step 2 and step 3 until the water content of coal slime reaches requirement,
Step 4: after the water content of coal slime reaches requirement, close negative-pressure air fan (5), air-heater (6) and heat-exchanger pump (8), open discharging hermatic door (1.2), start conveyer belt (2), making coal slime from the coal slime port of export landing of undermost conveyer belt (2) to going out in funnel (4), collecting the coal slime of having dried.
7. coal slime dewatering furnace drying method according to claim 6, is characterized in that, also comprise step 5: spliced mutually by multiple baking room (1), repeatedly repeats step 1 to step 3 until coal slime water content reaches requirement.
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CN107449229A (en) * 2017-08-18 2017-12-08 江俊华 A kind of sludge treatment device of hydraulic engineering environmental protection
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CN107449229A (en) * 2017-08-18 2017-12-08 江俊华 A kind of sludge treatment device of hydraulic engineering environmental protection

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