CN207596791U - A kind of fine coal drying oven based on packed bed drying and the drying device based on the drying oven - Google Patents

Abstract

The utility model discloses a kind of fine coal drying oven based on packed bed drying and the drying device based on the drying oven, including drying oven and and dry Flash Gas Compression Skid System；Drying oven includes drying box and roto-clone separator；Drying box upper end is provided with raw material coal bunker, and lower end is provided with drainage conduit, and side is connected with roto-clone separator；Dry Flash Gas Compression Skid System includes water ring vacuum pump, gas-liquid separator, sedimentation basin, water supply pump and cooler；The exhaust outlet of roto-clone separator is connected with Water-ring vacuum pump intake, and the outlet of water ring vacuum pump is connected with the entrance of gas-liquid separator, and the liquid outlet of gas-liquid separator is connected with sedimentation basin, and sedimentation basin is connected after water supply pump and cooler with water ring vacuum pump.The shortcomings that feed coal is big without waste water yield caused by drying during efficiently solving existing pyrolysis of coal, high energy consumption.Preheating and drying, dry gas stream dedusting are in direct contact using gas-solid simultaneously, while recycle dry generation water, technical process is simple, compact, reliable, stable.

Description

A kind of fine coal drying oven based on packed bed drying and the drying based on the drying oven Device

Technical field

The utility model belongs to coal chemical industry (and oil shale) pyrolysis art, and in particular to a kind of powder based on packed bed drying Coal drying oven and the drying device based on the drying oven.

Background technology

Due to rich coal resources in China, distributional region is wide, and utilization is of the remote past, and coal is in the national economic development, energy There is critical role in the safety guarantee of source.For a long time, due to the limitation of technology so that coal utilization becomes the master of atmospheric environment Want pollution sources.And the clean and effective of coal is passed through using being to change single utilization pattern of traditional coal directly as fuel Its raw coal is produced as gaseous state (coal gas), liquid (tar), three big product of solid-state (semicoke) by pyrolysis of coal technology.Hereafter again to coal Gas carries out advanced treating, the cleanings such as chemical products or liquefied natural gas, hydrogen such as production methanol, ethylene glycol, acetic acid, synthesis ammonia The energy；Coal tar is after the fine chemical products such as extraction separation benzene,toluene,xylene therein, phenol, naphthalene, anthracene, to itself plus hydrogen life Produce high-quality clean fuel liquid oil；The cleaning semicoke of nitrogen, sulphur, phosphorus and volatile matter is eliminated, can not only be used for domestic fuel, and available In industrial reduction agent, the high value added products such as activated carbon, carbon black can also be become after finishing；It is final to realize difference in raw coal The recycling high-efficiency cleaning of component utilizes.However the feed coal used during pyrolysis of coal at present, mostly using wet method washing work Skill, higher than 13%, which removes the moisture of cleaned coal after washing without dry, can bring pyrolysis oven into as phenol wastewater, should The biochemical processing method of waste water routine is difficult to up to standard or brings the excessively high quagmire of processing cost using high-level oxidation technology.Due to What is brought into feed coal washing process is free water, these free waters need absorption heat to make its vaporization in pyrolytic process Into in pyrolysis oil gas, absorption cold is needed to be condensed again in oil gas condensation removal process is pyrolyzed, dual energy Consumption, reduces production efficiency, increases waste water yield and intractability.

Patent CN205747854U provides a kind of raw material drying sorting unit, which includes coal charge conveyer, coal Material conveyer is connect with raw coal drying oven, and raw coal drawing mechanism is provided with below raw coal drying oven, is below drawing mechanism originally Sorting mechanism is provided with, collector, transmission device is provided with below sorting mechanism, drop is provided with and communicated on the side of sorting mechanism Dirt device and dust collecting；The device for reducing dust is connected with dust collecting by dust-fall pipe.The utility model is done Dry process carries out step by step with assorting room, and assorting room uses normal temperature air, its dried feed coal is sorted Meanwhile normal temperature air has cooling down effect to dried feed coal, causes energy loss, and it is complicated be not suitable for heat Solve the direct combination of device.

Patent CN206176948U provides brown coal drying and upgrading and dry water recycling system.The system includes drying Device and preheater, the preheater include housing, and the case top sets feed inlet, and bottom sets out material mouth, top set air-vent, Lower part sets air inlet, and epimere is equipped with the upper heating tube bundle of lateral arrangement in the housing, and hypomere is equipped with the lower heating of lateral arrangement Tube bank, the air inlet are connected through lower heating tube bundle, gas-liquid separation chamber, upper heating tube bundle with air-vent；The drier into The discharge port of material mouth and preheater connects, and the moisture outlet of the drier is connected through the air inlet of deduster and preheater, institute The condensation-water drain for stating gas-liquid separation chamber is connect with water treatment system.The utility model is done using the method for indirectly heat Dry, drying efficiency is low, although the dry water complex technical process of recycling.

Utility model content

The utility model solves the problems, such as to be to provide a kind of fine coal drying oven dried based on packed bed and do based on this The drying device of dry stove, feed coal is big without waste water yield caused by drying during efficiently solving existing pyrolysis of coal, energy Consume the shortcomings that high.Preheating and drying, dry gas stream dedusting are in direct contact using gas-solid simultaneously, while recycle dry generation water, technique Process is simple, compact, reliable, stable.

The utility model is to be achieved through the following technical solutions：

A kind of fine coal drying oven based on packed bed drying, detaches including raw material coal bunker, drying box, drainage conduit and vortex Device；Raw material top of coal bunker is equipped with the coal dropping port entered for feed coal, and be provided in raw material coal bunker makes its raw material in fill process The inner member of coal particle filling even, feed coal orlop portion are provided with material blanking tube, drying box, drying box are provided with below material blanking tube It is divided into drying box top, drying box middle part, the part of drying box bottom end three, the lower horizontal of the top connection material blanking tube of drying box Hot carrier gas gas distribution manifold is provided with, hot carrier gas gas distribution manifold tops are equipped with hot carrier gas inlet, and hot carrier gas gas distribution manifold runs through drying Case top babinet, the axial direction of hot carrier gas gas distribution manifold are distributed with multigroup bronchus, every group of bronchus including two angles be 90~ 120 degree of hot carrier gas distribution bronchus, the hot carrier gas distribution bronchus that two angles are 90~120 degree are arranged on hot carrier gas gas distribution Below manifold radial sections, bronchus is connected with hot carrier gas gas distribution manifold, and bronchus extends to vertical during drying box inner vertical walls Downwards up to connecting multiple horizontal positioned cloth gas hoods, hot carrier gas gas distribution respectively on drying box bottom end, bronchial vertical section The tube bottom of manifold is provided with multiple gas collecting tubes, and each gas collecting tube other end bending converges to gas gathering manifold, and gas gathering manifold is in drying box Lower ends bent passes through drying box side wall to be provided with multiple gas gathering masks communicated therewith, gas gathering mask on each gas collecting tube to outside it It is correspondingly arranged at cloth gas hood lower part, drying box bottom end is provided with drainage conduit, and discharge pipe outer wall is equipped with vibrator, on gas gathering manifold It is connected with the air inlet of roto-clone separator.

V-arrangement is is inverted in the section of the cloth gas hood, and v-shaped opening is downward, and cloth gas hood includes the cloth gas hood herringbone at top Umbrella and the vertical cloth gas hood wing plate of both sides, the angle of cloth gas hood herringbone umbrella is 60~90 degree, the bottom end of cloth gas hood herringbone umbrella Both sides connect two blocks of cloth gas hood wing plates respectively, and cloth gas hood wing plate is ladder structure of right angle, and the base vertical of right-angled trapezium is placed, cloth Gas hood wing plate makes cloth gas hood form the small structure in the big one end in one end, and the big end of cloth gas hood is connected with bronchus, cloth gas hood it is small End edge extends to the center of drying box, is provided with cloth gas hood end cap on the small end of cloth gas hood, cloth gas hood forms variable along its length The gas channel in section is provided with dovetail v notch v along the inclination bottom end of cloth gas hood wing plate.

V-arrangement is is inverted in the section of the gas gathering mask, and v-shaped opening is downward, and gas gathering mask includes the gas gathering mask herringbone at top Umbrella and the vertical gas gathering mask wing plate of both sides, the folder solution of gas gathering mask herringbone umbrella is 60~90 degree, the bottom end of gas gathering mask herringbone umbrella Both sides connect two blocks of gas gathering mask wing plates respectively, and gas gathering mask wing plate is ladder structure of right angle, and the base vertical of right-angled trapezium is placed, collection Gas hood wing plate makes gas gathering mask form the small structure in the big one end in one end, and the big end of gas gathering mask is connected with gas collecting tube, gas gathering mask it is small End edge extends to the inner wall of drying box, is provided with gas gathering mask end cap on the small end of gas gathering mask, gas gathering mask forms variable along its length The gas channel in section is provided with round charging hole along the inclination bottom end of gas gathering mask wing plate.

The roto-clone separator includes central airway and roto-clone separator housing；In the roto-clone separator housing Central airway is provided with, roto-clone separator housing includes straight pipe, expanding reach, main cylinder and contraction section successively from top to bottom； Acclivitous air inlet is provided on straight pipe, powder cabin is equipped with below contraction section, powder cabin lower end is exported for coal dust, in contraction section Guide cylinder is set, and guide cylinder bottom is provided with conical baffled, and rotating flow guidance blade is provided on the outer wall of central airway upper end, revolves Turn guide vane and be arranged in order three-level, central airway lower end tube wall sets multiple gas ports, and central airway upper end is equipped with rotation The exhaust outlet of whirlpool separator, gas gathering manifold are connected to by the exhaust outlet of its own on the air inlet of roto-clone separator.

The air inlet is tangentially entered between the straight pipe of cylinder and central airway upper end by roto-clone separator cylinder Space in, roto-clone separator inner walls are surface-treated wortex device using Teflon spraying technology, make skin resistance Coefficient is less than 0.1.

The square-tube-shaped guide shell that the inner member is overlapped by multiple coaxial lines forms, and top is successively from inside to outside for guide shell Stairstepping moves down.

Beam material bucket at feed coal orlop portion conical discharge port is set, is provided with below gas gathering mask and is fixed on dry chamber interior wall Supersonic generator.

The drainage conduit connected via drying box bottom end enters the pyrolysis furnace apparatus of bottom or connection discharge machine equipment.

Drying box has steel shell, and insulating layer, drying box middle part inner wall setting spillplate are set outside drying box.

A kind of drying device based on the drying oven, including drying oven and and dry Flash Gas Compression Skid System；Described is dry Dry stove includes raw material coal bunker, drying box, drainage conduit and roto-clone separator；The drying box upper end is provided with raw material coal bunker, under End is provided with drainage conduit, and side is connected with roto-clone separator；The drying Flash Gas Compression Skid System includes water ring vacuum pump, gas-liquid point From device, sedimentation basin, water supply pump and cooler；The exhaust outlet of the roto-clone separator is connected with Water-ring vacuum pump intake, water ring The outlet of vacuum pump is connected with the entrance of gas-liquid separator, and the liquid outlet of gas-liquid separator is connected with sedimentation basin, sedimentation basin warp It is connected after water supply pump and cooler with water ring vacuum pump.

Compared with prior art, the utility model has technique effect beneficial below：

A kind of fine coal drying oven based on packed bed drying provided by the utility model and the dry dress based on the drying oven It puts, the shortcomings that feed coal is big without waste water yield caused by drying during efficiently solving existing pyrolysis of coal, high energy consumption.Together Shi Caiyong gas-solids are in direct contact preheating and drying, dry gas stream dedusting, at the same recycle it is dry generate water, technical process is simple, it is compact, Reliably, stablize.

The utility model also has the characteristics that：

1st, drying oven uses upper entering and lower leaving, and the hot carrier gas seepage flow heat transfer method of multilayer-misorientation of gas-particle two-phase cocurrent is preheated It is dry, there is the characteristics of initial temperature differences are big, and heat transfer efficiency is high.

2nd, multilayer-misorientation is placed with cloth gas hood and gas gathering mask, cloth gas hood and gas gathering mask edge in the filling bed in drying box Length direction has the gas channel of variable cross section.

3rd, setting supersonic generator in the bed of material of gas gathering mask bottom, the concussion of ultrasonic wave, peptizaiton enhance raw coal powder The air-flow of dirt carries removal efficiency.

4th, gas solid separation is carried out using High Efficiency Vortex separator, removing grain size is less than 1um, efficiency >=98%.

5th, using auxiliary vacuum suction, equal temperature condition improves flue gas with water ability, reduces energy expenditure, recycles drying Water.

6th, dry outlet of still setting vibration degasser, resets solid particle displacement, gap shrinks, through solid particle Obstruction and throttle effect realize the isolation of air-flow.

7th, gas-particle two-phase cocurrent improves the Dual-Phrase Distribution of Gas olid temperature difference, is conducive to surface water to gas evaporation.

8th, smaller raw coal grain size reduces raw material coal particle internal heat transfer resistance, multistage, Multi-channel hot carrier gas seepage flow heat transfer Method carries out preheating and drying, accelerates the moving of particle and seepage flow heat transfer efficiency.

9th, Multi-stage heating is conducive to remain relatively low water vapor concentration in hot carrier gas, while assist vacuum suction, drop Low gaseous pressure, reduces the boiling point of water, improves gas phase saturated concentration.

Supersonic generator, raw material coal particle after feed coal drying terminates are provided with below the gas gathering mask of the utility model Surface viscosity reduces, be attached on originally on large particle surface≤coal dust of below 0.2mm, concussion, dispersion in ultrasonic wave are made Make coal dust under and take away moisture-free coal with hot carrier gas, achieve the purpose that dedusting dedirt.

The drying box of the utility model has steel shell, outside setting insulating layer, drying box middle part inner wall setting gear coal Plate, it is inner insulating layer that its feed coal accumulated along drying oven inner wall is made, which to be trapped at inner wall, former due to non-conductor of the coal for heat Its air-flow seep effect decrease when material coal does not flow, while dry chamber interior wall is protected not worn by coal particle.

Description of the drawings

Fig. 1 is drying device structure diagram.

Fig. 2 is the structure diagram of drying oven.

Fig. 3 is drying oven gas flow schematic diagram.

Fig. 4 is drying oven internal structure schematic diagram.

Fig. 5 is air distribution cover structure schematic diagram.

Fig. 6 is gas gathering mask structure diagram.

Fig. 7 is roto-clone separator structure diagram.

S1 is feed coal wherein in figure, and S2 is hot carrier gas, and S3 is moisture-free coal, and S4 is the hot carrier gas of dust-laden, and S5 is coal dust, S6 For the hot carrier gas of dedirt, S7 is gas-liquid phase mixture, and S8 is separation gas, and S9 is liquid phase water, and S10 is coal slime, and S11 is detaches water, S12 For recycle-water, S13 is working solution.

Wherein in figure, 1 is raw material coal bunker, and 2 be drying box, and 3 be drainage conduit, and 4 be roto-clone separator, and 5 be Water-ring vacuum Pump, 6 be gas-liquid separator, and 7 be sedimentation basin, and 8 be water supply pump, and 9 be cooler, and 11 be coal dropping port, and 12 be inner member, and 13 be beam Hopper, 14 be material blanking tube, and 15 be feed bin housing, and 21 be hot carrier gas inlet, and 22 be hot carrier gas gas distribution manifold, and 23 be bronchus, 24 It is cloth gas hood herringbone umbrella for cloth gas hood, 241,242 be cloth gas hood wing plate, and 243 be dovetail v notch v, and 244 be big end, and 245 are Small end, 246 be end cap, and 25 be gas gathering mask, and 251 be gas gathering mask herringbone umbrella, and 252 be gas gathering mask wing plate, and 253 be round charging Hole, 254 be big end, and 255 be small end, and 256 be end cap, and 26 be gas collecting tube, and 27 be gas gathering manifold, and 28 be exhaust outlet, and 29 be drying Tank shell, 31 be vibrator, and 32 be discharge tube shell, and 33 be discharge gate, and 41 air inlets, 42 export for coal dust, and 43 be exhaust outlet, 44, centered on gas-guide tube, centered on 441 gas-guide tube upper end, and 442 be rotating flow guidance blade, gas-guide tube lower end centered on 443, 444 be gas port, and 45 be roto-clone separator housing, and 451 be straight pipe, and 452 be expanding reach, and 453 be main cylinder, and 454 is shrink Section, 46 be powder cabin, and 47 be guide cylinder, and 48 be conical baffled.

D1 is drying box top wherein in figure, and for D2 in the middle part of drying box, D3 is drying box bottom end, and C1 is gas distribution duct, C2 For gas collection duct.

Specific embodiment

The utility model is described in further detail with reference to specific embodiment, described is to the utility model Explanation rather than restriction.

Referring to Fig. 1 to Fig. 7, a kind of fine coal drying oven based on packed bed drying, including raw material coal bunker 1, drying box 2, row Expects pipe 3 and roto-clone separator 4；Raw material top of coal bunker is equipped with the coal dropping port 11 entered for feed coal, is provided in raw material coal bunker Make the inner member 12 of its raw material coal particle filling even in fill process, 1 bottom of raw material coal bunker is provided with material blanking tube 14, blanking 14 lower section of pipe is provided with drying box 2, and drying box 2 divides for tri- D2, drying box bottom end D3 portions in the middle part of drying box top D1, drying box Point, the lower horizontal of the top connection material blanking tube of drying box 2 is provided with hot carrier gas gas distribution manifold 22, and hot carrier gas gas distribution manifold 22 is pushed up End is equipped with hot carrier gas inlet 21, and hot carrier gas gas distribution manifold 22 runs through drying box top babinet, the axial direction of hot carrier gas gas distribution manifold 22 It is distributed with multigroup bronchus, every group of bronchus includes the hot carrier gas that two angles are 90~120 degree and be distributed bronchus 23, two The hot carrier gas distribution bronchus 23 that angle is 90~120 degree is arranged below hot 22 radial sections of carrier gas gas distribution manifold, bronchus It is connected with hot carrier gas gas distribution manifold, vertically downward until drying box bottom end, branch gas when bronchus extends to drying box inner vertical walls Connect multiple horizontal positioned cloth gas hoods 24 in the vertical section of pipe respectively, the tube bottom of hot carrier gas gas distribution manifold 22 is provided with multiple Gas collecting tube 26, each 26 other end of gas collecting tube bending converge to gas gathering manifold 27, and gas gathering manifold passes through dry in drying box lower ends bent Dry case side wall is provided with multiple gas gathering masks 25 communicated therewith, gas gathering mask 25 is correspondingly arranged to outside it on each gas collecting tube 26 In 24 lower part of cloth gas hood, drying box bottom end is provided with drainage conduit 3, and 3 outer wall of drainage conduit is equipped with vibrator, connects on gas gathering manifold 27 The air inlet of roto-clone separator 4 is connected to, 25 lower section of gas gathering mask is provided with the supersonic generator for being fixed on 2 inner wall of drying box.

Wherein, V-arrangement is is inverted in the section of the cloth gas hood 24, and v-shaped opening is downward, and cloth gas hood 24 includes the cloth at top Gas hood herringbone umbrella 241 and the vertical cloth gas hood wing plate 242 of both sides, the angle of cloth gas hood herringbone umbrella is 60~90 degree, gas distribution The bottom end both sides of cover herringbone umbrella connect two blocks of cloth gas hood wing plates 242 respectively, and cloth gas hood wing plate 242 is ladder structure of right angle, directly The trapezoidal base vertical in angle is placed, and cloth gas hood wing plate 242 makes cloth gas hood form the small structure in the big one end in one end, the big end of cloth gas hood 244 are connected with bronchus, and the small end 245 of cloth gas hood is provided with cloth along the center for extending to drying box on the small end 245 of cloth gas hood Gas hood end cap 246, cloth gas hood 24 form the gas channel of variable cross section, are set along the inclination bottom end of cloth gas hood wing plate along its length It is equipped with dovetail v notch v 243.

V-arrangement is is inverted in the section of the gas gathering mask 25, and v-shaped opening is downward, and gas gathering mask 25 includes the gas gathering mask people at top Font umbrella 251 and the vertical gas gathering mask wing plate 252 of both sides, the folder solution of gas gathering mask herringbone umbrella is 60~90 degree, gas gathering mask herringbone The bottom end both sides of shape umbrella connect two blocks of gas gathering mask wing plates respectively, and gas gathering mask wing plate is ladder structure of right angle, the base of right-angled trapezium It is disposed vertically, gas gathering mask wing plate makes gas gathering mask form the small structure in the big one end in one end, and the big end 254 of gas gathering mask is connected with gas collecting tube Logical, the small end 255 of gas gathering mask is provided with gas gathering mask end cap 256 on the small end 255 of gas gathering mask, collects along the inner wall for extending to drying box Gas hood forms the gas channel of variable cross section along its length, and the inclination bottom end of gas gathering mask wing plate is provided with round charging hole 253。

The roto-clone separator 4 includes central airway 44 and roto-clone separator housing 45；The roto-clone separator Central airway 44 is provided in housing 45, roto-clone separator housing 45 includes straight pipe 451, expanding reach successively from top to bottom 452nd, main cylinder 453 and contraction section 454；Acclivitous air inlet 41 is provided on straight pipe 451,454 lower section of contraction section is set There is powder cabin 46,46 lower end of powder cabin exports 42 for coal dust, and guide cylinder 47 is set in contraction section, and 47 bottom of guide cylinder is provided with taper gear Plate 48 is provided with rotating flow guidance blade 442 on 441 outer wall of central airway upper end, and rotating flow guidance blade 442 is arranged in order three Grade, 443 tube wall of central airway lower end set multiple gas ports 444, and central airway upper end is equipped with the exhaust of roto-clone separator Mouth 43, gas gathering manifold 27 is connected to by the exhaust outlet 28 of its own on the air inlet of roto-clone separator 4.

The air inlet 41 by roto-clone separator cylinder tangentially into straight pipe and the central airway upper end of cylinder it Between space in, 45 inner wall of roto-clone separator housing is surface-treated wortex device using Teflon spraying technology, makes surface Resistance coefficient is less than 0.1.

The square-tube-shaped guide shell that the inner member is overlapped by multiple coaxial lines forms, and top is successively from inside to outside for guide shell Stairstepping moves down, and beam material bucket is set at feed coal orlop portion conical discharge port, and the drainage conduit via the connection of drying box bottom end enters The pyrolysis furnace apparatus of bottom or connection discharge machine equipment；Drying box has steel shell, and insulating layer is set outside drying box, dry Inner wall setting spillplate in the middle part of case.

Referring to Fig. 1, a kind of drying device based on the drying oven, including drying oven and and dry Flash Gas Compression Skid System； The drying oven includes raw material coal bunker 1, drying box 2, drainage conduit 3 and roto-clone separator 4；2 upper end of the drying box setting There is raw material coal bunker 1, lower end is provided with drainage conduit, and side is connected with roto-clone separator 4；The drying Flash Gas Compression Skid System includes water Ring vacuum pump 5, gas-liquid separator 6, sedimentation basin 7, water supply pump 8 and cooler 9；The exhaust outlet 43 of the roto-clone separator 4 with 5 entrance of water ring vacuum pump is connected, and the outlet of water ring vacuum pump 5 is connected with the entrance of gas-liquid separator 6, the liquid of gas-liquid separator 6 Body outlet is connected with sedimentation basin 7, and sedimentation basin 7 is connected after water supply pump 8 and cooler 9 with water ring vacuum pump 5.

Wherein, 1, drying oven is using upper entering and lower leaving, the hot carrier gas seepage flow of multilayer-misorientation of gas-particle two-phase cocurrent conduct heat method into Row preheating and drying has the characteristics of initial temperature differences are big, and heat transfer efficiency is high.

2nd, multilayer-misorientation is placed with cloth gas hood and gas gathering mask, cloth gas hood and gas gathering mask edge in the filling bed in drying box Length direction has the gas channel of variable cross section.

3rd, setting supersonic generator in the bed of material of gas gathering mask bottom, the concussion of ultrasonic wave, peptizaiton enhance raw coal powder The air-flow of dirt carries removal efficiency.

4th, gas solid separation is carried out using High Efficiency Vortex separator, removing grain size is less than 1um, efficiency >=98%.

5th, using auxiliary vacuum suction, equal temperature condition improves flue gas with water ability, reduces energy expenditure, recycles drying Water.

6th, dry outlet of still setting vibration degasser, resets solid particle displacement, gap shrinks, through solid particle Obstruction and throttle effect realize the isolation of air-flow.

The drying of coal occurs in feed coal solid particle heating process.Normal conditions are sent out in atmospheric pressure It is raw in environment temperature within the temperature range of 106 DEG C or so.The drying of coal is to be related to complicated liquid water, steam in coal solid The migration of grain hole.When hot carrier gas seepage flow to feed coal particulate interspaces, under the circumgranular hot nebulizer gas pressure of feed coal, The temperature of hot carrier gas is equal to or higher than the boiling point of water, then the liquid water on particle surface is intended to saturation temperature.If in feed coal Under circumgranular hot nebulizer gas pressure, the temperature of hot carrier gas is less than the boiling point of water, then the liquid water on particle surface is intended to Wet-bulb temperature.

When drying process starts, liquid water is stored in the internal void of solid particle structure, and liquid water passes through raw material The mechanism such as the capillarity of coal solid particle internal void move to surface, and the surface of solids forms and moistens very much boundary, i.e., former Material coal surface is continuously covered by coating liquid water.Under the circumgranular hot nebulizer gas pressure of feed coal, if temperature of hot carrier gas etc. In or higher than water boiling point, which takes away to circumgranular gas phase, and by hot carrier gas.When drying process persistently carries out When, free water is no longer available in particle surface, and moistening boundary retracts to the inside of particle.At this point, the phase from liquid water to steam Change is happened inside particle, and in order to leave particle, steam has to pass through the drying layer around feed coal granular center, since it is dry The thickness of dry layer increases, and rate of drying gradually reduces.

Quality transfering rate in above-described coal drying process from coal particle surface degree to gas phase is by following three Factor influences：

(1) the liquid gas interface temperature of the temperature of particle, particularly water.

(2) heat transfer rate between gas phase and particle.

(3) water vapor concentration in surrounding gas-bearing formation.

The utility model is directed to above-mentioned influence factor, provides following measure：

(1) gas-particle two-phase cocurrent improves the Dual-Phrase Distribution of Gas olid temperature difference, is conducive to surface water to gas evaporation.

(2) smaller raw coal grain size reduces raw material coal particle internal heat transfer resistance, multistage, Multi-channel hot carrier gas seepage flow heat transfer Method carries out preheating and drying, accelerates the moving of particle and seepage flow heat transfer efficiency.

(3) Multi-stage heating is conducive to remain relatively low water vapor concentration in hot carrier gas, while assist vacuum suction, drop Low gaseous pressure, reduces the boiling point of water, improves gas phase saturated concentration.

Specifically, the drying device of the utility model includes drying oven and dry Flash Gas Compression Skid System two large divisions, wherein dry Dry stove is made of raw material coal bunker, drying box, drainage conduit, four part of roto-clone separator；Dry Flash Gas Compression Skid System includes：Water-ring vacuum The compositions such as pump, gas-liquid separator, sedimentation basin, water supply pump and cooler.Especially the drying oven device structure of the utility model is done It is described in detail.

Raw material coal bunker is arranged on the top of drying box, and raw material top of coal bunker has the coal dropping port entered for feed coal, feed coal Be provided in storehouse makes the inner member of its raw material coal particle filling even in fill process, which is overlapped by multiple coaxial lines Square-tube-shaped guide shell composition, stairstepping moves down guide shell successively on top from inside to outside.The feed coal entered by blanking port is led Guide shell loads to the periphery successively by center for flow cartridge constraint.Guide shell constraint can prevent shape in feed coal dropping process Size raw material coal particle is isolated into large size cone heap.After feed coal stops in raw material coal bunker into row buffering, through raw material The material blanking tube of coal bunker bottom setting enters drying box.

Feed coal in raw material coal bunker enters drying box via the material blanking tube of bottom, and drying box is divided into top, middle part, bottom end Three parts.The lower horizontal of the top connection material blanking tube of drying box is provided with hot carrier gas gas distribution manifold, hot carrier gas gas distribution manifold Through drying box top babinet, the heat supply that two angles of setting are 90~120 degree below hot carrier gas gas distribution manifold radial sections carries The bronchus of qi leel cloth, bronchus are connected with hot carrier gas gas distribution manifold, when bronchus extends to drying box inner vertical walls vertically to Down until drying box bottom end.Multigroup bronchus is distributed along the axial direction of hot carrier gas gas distribution manifold, one group i.e. two angle is 90~120 The bronchus of degree.Multiple horizontal positioned cloth gas hoods are connected in bronchial vertical section respectively, V is is inverted in the cloth gas hood section Shape, v-shaped opening are downward.V-arrangement cloth gas hood by the cloth gas hood herringbone umbrella at top with both sides vertical cloth gas hood groups of vanes into gas distribution The folder solution of cover herringbone umbrella is 60~90 degree, and the bottom end both sides of cloth gas hood herringbone umbrella connect two blocks of cloth gas hood wing plates, cloth respectively Gas hood wing plate is ladder structure of right angle, and the base vertical of right-angled trapezium is placed, its inverted V-arrangement cloth gas hood is made to form one end big by one Hold small, the big end of cloth gas hood is connected with bronchus, and small end is along the center for extending to drying box.Cloth gas hood shape along its length simultaneously Into the gas channel of variable cross section, have and optimize hot carrier gas stream even into reinforcing moves down disturbance and the seepage flow of particle layers Heat transfer.At the same time, dovetail v notch v is set along the inclination bottom end of cloth gas hood wing plate, makes raw material coal particle along cloth gas hood wing plate table When face moves down, in V-arrangement cloth gas hood inner chamber body, the feed particles ditch ridge of a lot of transverse direction cloth gas hood axial direction, lateral ditch are formed The hot carrier gas that ridge not only flows through produces disturbance, while also increases surface area of the feed particles in cloth gas hood；Form ditch Continuous supplement forms new ditch ridge again while the raw material coal particle on ridge moves down, and increases its surface particles mobility, With one and the hot carrier gas rapid fusion that flows down, better gas dispersion strengthens seepage flow heat-transfer effect.

Due to being connected to multiple horizontal positioned cloth gas hoods along bronchial vertical section, the drying process point of case is made it dry It is carried out at the same time into multistage.Seepage flow passes through the hot carrier gas in raw material coal seam, and the gas gathering mask being correspondingly arranged via cloth gas hood lower part collects.Collection For gas hood structural section to be inverted V-arrangement, v-shaped opening is downward.V-arrangement cloth gas hood by top cloth gas hood herringbone umbrella and both sides it is vertical Cloth gas hood groups of vanes is into the folder solution of cloth gas hood herringbone umbrella is 60~90 degree, and the bottom end both sides of cloth gas hood herringbone umbrella connect respectively Two blocks of cloth gas hood wing plates are connect, cloth gas hood wing plate is ladder structure of right angle, and the base vertical of right-angled trapezium is placed, cloth gas hood wing plate Structure form inverted V-arrangement cloth gas hood the big one end in one end is small, and the big end of gas gathering mask is connected with gas collecting tube, the small end of gas gathering mask Along the inner wall for extending to drying box.Gas gathering mask forms the gas channel of variable cross section along its length simultaneously, has and optimizes hot carrier gas Air-flow is uniformly discharged, and strengthens the disturbance for moving down particle layers and seepage flow heat transfer.At the same time, along the inclination bottom end of gas gathering mask wing plate The round charging hole of setting, make raw material coal particle and hot carrier gas along gas gathering mask wing plate surface move down when, enter collection through round charging hole In gas hood inner chamber body, gas solid separation occurs in gas gathering mask cavity, hot carrier gas collects along internal cavity small end to big end, and by each Gas gathering mask enters gas collecting tube, and each gas collecting tube one end is connected with the tube bottom of hot carrier gas gas distribution manifold, and other end bending converges to collection Gas manifold.Gas gathering manifold passes through dry tank wall to outside it in drying box lower ends bent.

For feed coal in drying box after drying step by step, the drainage conduit connected via drying box bottom end enters the pyrolysis of bottom Furnace apparatus or connection discharge machine equipment.In the process, discharge pipe outer wall is equipped with vibrator, and vibrator high-frequency excitation power is transmitted Drying coal particle inside to drainage conduit makes its drying coal particle moved down that particle position rearrangement, fine grained occur The gap that orderly filling is formed to bulky grain, while the gas extrusion carried secretly in particulate interspaces is discharged upwards, the accumulation of particle Density increases, and has effectively separated the connection between the dry pyrolysis gas of pyrolysis oven connected with hot carrier gas and bottom or and environment The connection of air.

Gas gathering manifold is connected to roto-clone separator entrance after tilting after drying box bottom end side wall is stretched out outside drying box, the rotation Whirlpool separator is provided with acclivitous air inlet, while the air inlet is tangentially entered the straight tube of cylinder by roto-clone separator cylinder In space between section and central airway upper end, rotating flow guidance blade is provided on the outer wall of central airway upper end, the blade Three-level is arranged in order, enables the gas entered in the space that the static energy of its own is converted into speed, gas is in itself spiral It is moved downward while turning, into the expanding reach of cylinder.At this point, flow rotation radius becomes larger, its swirling eddy is carried secretly Particle generate the centrifugal force of bigger, make Coal Dust that it centrifuges out tightly attach on main cylinder inner wall spiral to Under be moved into contraction section.Setting guide cylinder in contraction section, guide cylinder by the Coal Dust moved down along main cylinder inner wall with The air-flow of rotation is separated, and Coal Dust enters bottom along the gap between the contraction section inner wall of main cylinder and guiding drum outer wall Powder cabin in.The air-flow of rotation continues rotation and moves down, and flow rotation radius becomes smaller, and speed reduces, and attaches in guide cylinder The dust particles of wall are threaded into the powder cabin of lower part connection, and air-flow is moved upwards by conical baffled effect.

Central airway lower end tube wall sets multiple gas ports, due to roto-clone separator centre line zone air velocity most It is low, when by gas-guide tube radial direction outlet, the air-flow in vortex pipe can be made uniformly to export, while avoid conventional gas-guide tube bottom end export It is easy to cause air flow shortcircuit unstability and influences efficiency of dust collection reduction.It is moved upwards into the air-flow in gas-guide tube, through top vent Mouth discharge.Simultaneously in order to drop the frictional resistance between bottom particle air-flow and cylinder, the inner wall contacted with Coal Dust uses Teflon Imperial spraying technology is surface-treated roto-clone separator, and skin resistance coefficient is made to be less than 0.1, and roughness is low, greasy property increases By force.

Supersonic generator, raw material coal particle after feed coal drying terminates are provided with below the gas gathering mask of the utility model Surface viscosity reduces, be attached on originally on large particle surface≤coal dust of below 0.2mm, concussion, dispersion in ultrasonic wave are made Make coal dust under and take away moisture-free coal with hot carrier gas, achieve the purpose that dedusting dedirt.

The drying box of the utility model has steel shell, outside setting insulating layer, drying box middle part inner wall setting gear coal Plate, it is inner insulating layer that its feed coal accumulated along drying oven inner wall is made, which to be trapped at inner wall, former due to non-conductor of the coal for heat Its air-flow seep effect decrease when material coal does not flow, while dry chamber interior wall is protected not worn by coal particle.

The drying oven of the utility model applies also for the drying process of the inadherent particulate matter such as Cereals, peanut, jujube.

The basic principle of the utility model and main feature and the advantages of the utility model has been shown and described above.One's own profession The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description Only illustrate the principle of the utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model is also Various changes and modifications are had, these various changes and improvements fall within the scope of the claimed invention.The utility model Claimed range is defined by the appending claims and its equivalent thereof.

Claims (10)

1. a kind of fine coal drying oven based on packed bed drying, which is characterized in that including raw material coal bunker (1), drying box (2), row Expects pipe (3) and roto-clone separator (4)；Raw material top of coal bunker is equipped with the coal dropping port (11) entered for feed coal, is set in raw material coal bunker Put makes the inner member (12) of its raw material coal particle filling even in fill process, and raw material coal bunker (1) bottom is provided with blanking It manages (14), drying box (2) is provided with below material blanking tube (14), drying box (2) is divided into drying box top (D1), drying box middle part (D2), drying box bottom end (D3) three parts, the lower horizontal of the top connection material blanking tube of drying box (2) are provided with hot carrier gas cloth Gas manifold (22), hot carrier gas gas distribution manifold (22) top are equipped with hot carrier gas inlet (21), and hot carrier gas gas distribution manifold (22) is through dry Multigroup bronchus is distributed in dry case top babinet, the axial direction of hot carrier gas gas distribution manifold (22), and every group of bronchus includes two angles Bronchus (23) is distributed for 90~120 degree of hot carrier gas, the hot carrier gas distribution bronchus (23) that two angles are 90~120 degree is set It puts below hot carrier gas gas distribution manifold (22) radial section, bronchus is connected with hot carrier gas gas distribution manifold, and bronchus extends to dry It is multiple horizontal positioned up to being connected respectively on drying box bottom end, bronchial vertical section vertically downward during dry case inner vertical walls Cloth gas hood (24), the tube bottom of hot carrier gas gas distribution manifold (22) are provided with multiple gas collecting tubes (26), and each gas collecting tube (26) other end is curved Song converges to gas gathering manifold (27), and gas gathering manifold passes through drying box side wall to outside it in drying box lower ends bent, each gas collection Multiple gas gathering masks (25) communicated therewith are provided on pipe (26), gas gathering mask (25) is correspondingly arranged at cloth gas hood (24) lower part, does Dry bottom end is provided with drainage conduit (3), and drainage conduit (3) outer wall is equipped with vibrator, and vortex point is connected on gas gathering manifold (27) Air inlet from device (4).

2. the fine coal drying oven according to claim 1 based on packed bed drying, which is characterized in that the cloth gas hood (24) V-arrangement is is inverted in section, and v-shaped opening is downward, cloth gas hood herringbone umbrella (241) and both sides of the cloth gas hood (24) including top Vertical cloth gas hood wing plate (242), the angle of cloth gas hood herringbone umbrella is 60~90 degree, the bottom end both sides of cloth gas hood herringbone umbrella Respectively connect two pieces of cloth gas hood wing plates (242), cloth gas hood wing plate (242) be ladder structure of right angle, the base vertical of right-angled trapezium It places, cloth gas hood wing plate (242) makes cloth gas hood form the small structure in the big one end in one end, and the big end of cloth gas hood is connected with bronchus Logical, the small end edge of cloth gas hood extends to the center of drying box, and cloth gas hood end cap, cloth gas hood (24) edge are provided on the small end of cloth gas hood Length direction forms the gas channel of variable cross section, and the inclination bottom end of cloth gas hood wing plate is provided with dovetail v notch v (243).

3. the fine coal drying oven according to claim 1 or 2 based on packed bed drying, which is characterized in that the gas collection The section of (25) is covered to be inverted V-arrangement, and v-shaped opening is downward, gas gathering mask herringbone umbrella (251) and two of the gas gathering mask (25) including top The vertical gas gathering mask wing plate (252) of side, the folder solution of gas gathering mask herringbone umbrella is 60~90 degree, the bottom end two of gas gathering mask herringbone umbrella Side connects two blocks of gas gathering mask wing plates respectively, and gas gathering mask wing plate is ladder structure of right angle, and the base vertical of right-angled trapezium is placed, gas collection Cover wing plate makes gas gathering mask form the small structure in the big one end in one end, and the big end of gas gathering mask is connected with gas collecting tube, the small end of gas gathering mask Along the inner wall for extending to drying box, gas gathering mask end cap is provided on the small end of gas gathering mask, gas gathering mask forms variable section along its length The gas channel in face is provided with round charging hole (253) along the inclination bottom end of gas gathering mask wing plate.

4. the fine coal drying oven according to claim 1 based on packed bed drying, which is characterized in that the vortex separation Device (4) includes central airway (44) and roto-clone separator housing (45)；It is provided in the roto-clone separator housing (45) Central airway (44), roto-clone separator housing (45) include straight pipe (451), expanding reach (452), main cylinder successively from top to bottom Body (453) and contraction section (454)；Acclivitous air inlet (41), contraction section (454) lower section are provided on straight pipe (451) Equipped with powder cabin (46), powder cabin (46) lower end exports (42) for coal dust, setting guide cylinder (47), guide cylinder (47) bottom in contraction section It is provided with conical baffled (48), rotating flow guidance blade (442), rotating flow guidance is provided on central airway upper end (441) outer wall Blade (442) is arranged in order three-level, and central airway lower end (443) tube wall sets multiple gas ports (444), in central airway Exhaust outlet of the end equipped with roto-clone separator, gas gathering manifold (27) are connected to roto-clone separator (4) by the exhaust outlet of its own On air inlet.

5. the fine coal drying oven according to claim 4 based on packed bed drying, which is characterized in that the air inlet (41) tangentially entered in the space between the straight pipe of cylinder and central airway upper end by roto-clone separator cylinder, vortex separation Device housing (45) inner wall is surface-treated wortex device using Teflon spraying technology, and skin resistance coefficient is made to be less than 0.1.

6. it is according to claim 1 based on packed bed drying fine coal drying oven, which is characterized in that the inner member by The square-tube-shaped guide shell composition that multiple coaxial lines overlap, stairstepping moves down guide shell successively on top from inside to outside.

7. the fine coal drying oven according to claim 1 based on packed bed drying, which is characterized in that the raw material coal bunker Bottom pyramidal discharge outlet sets beam material bucket, and the ultrasonic wave hair for being fixed on drying box (2) inner wall is provided with below gas gathering mask (25) Raw device.

8. the fine coal drying oven according to claim 1 based on packed bed drying, which is characterized in that described via drying The drainage conduit of bottom end connection enters the pyrolysis furnace apparatus of bottom or connection discharge machine equipment.

9. the fine coal drying oven according to claim 1 based on packed bed drying, which is characterized in that the drying box tool There is steel shell, insulating layer, drying box middle part inner wall setting spillplate are set outside drying box.

10. a kind of drying device based on claim 1-2 and 4-9 any one of them drying oven, which is characterized in that including dry Dry stove and and dry Flash Gas Compression Skid System；The drying oven includes raw material coal bunker (1), drying box (2), drainage conduit (3) and vortex Separator (4)；Described drying box (2) upper end is provided with raw material coal bunker (1), and lower end is provided with drainage conduit, and side is connected with rotation Whirlpool separator (4)；The drying Flash Gas Compression Skid System includes water ring vacuum pump (5), gas-liquid separator (6), sedimentation basin (7), supplies Water pump (8) and cooler (9)；The exhaust outlet (43) of the roto-clone separator (4) is connected with water ring vacuum pump (5) entrance, water The outlet of ring vacuum pump (5) is connected with the entrance of gas-liquid separator (6), liquid outlet and the sedimentation basin (7) of gas-liquid separator (6) It is connected, sedimentation basin (7) is connected after water supply pump (8) and cooler (9) with water ring vacuum pump (5).