CN206408078U - A kind of vacuum dehydration drying equipment - Google Patents

Abstract

The utility model discloses a kind of vacuum dehydration drying equipment, including Minton dryer shell (1), front end-plate (12) and front axle are sealed seal apparatus (13), front support bearing (14), end plate (23) and rear shaft seal sealing device (24), rear support bearing (26), evaporate chamber enclosure zone of heating (20), turn round heated mandrel (2) and heating pusher paddle scraper plate (4), feed pre-heating steam spout (10), condenser casing (6) and vacuum condenser device, vacuumize set of pumps (17), sealed feed arrangement (11) and drawing mechanism (21), drive device (16), condensate pump (18), cooling water system.Vacuum dryer device is the mode of heating of direct Hybrid Heating and indirect conduction heating.

Description

A kind of vacuum dehydration drying equipment

Technical field

The present invention relates to a kind of dehydrogenation drying equipment and technique under vacuum conditions.

Background technology

Some liquids and semi-fluid needs carry out dehydrating technique, product is obtained relatively low moisture content.Such as weave print Dye moisture percentage in sewage sludge has close relation with the utilization of resources, and the moisture percentage in sewage sludge after sewage treatment plant's concentration is up to 90-96%, In pulpous state or viscous fluid state, pipeline can be used by plunger pump.High water content sludge, bulky, property are complicated, Its available solid content is seldom., can be into paste mud after the pulpous state sludge of moisture content 90% is further dehydrated by mechanism filter-pressing Cake, moisture content is 80% or so, and weight will reduce half, and the sludge mechanical property of 80% moisture content is very poor, easily hardened and divide Dissipate difficulty.When by the pulpous state drying sludge of moisture content 90% to 60%, sludge calorific value 800 kilocalories/kilogram or so, weight subtracts It is few to arrive original 25%；When continuing to be dried to moisture content 45%, sludge is resilient fine granularity, and calorific value, which rises, reaches that 1400 is big Card/kilogram, quality only has original 18% or so, and burning comprehensive utilization can be mixed with a small amount of coal；Contain when sludge is continued to be dried to During water rate 10-20%, sludge will turn into brittle particle thing, calorific value may be up to 3000 kilocalories/kilogram or so, weight is also only original 1/8-1/10 point, can individually burn and use as generative fuel recycling.

It can be seen that, comprehensive Utilization Ways and the reduction moisture content of sludge have close relationship, and moisture percentage in sewage sludge is less than 45% Semi-dry sludge afterwards has just shown utilization of resources value.Effectively reduction moisture percentage in sewage sludge be solve sludge outlet it is main because Element, it is effective key for solving comprehensive utilization of mud to obtain quick and efficient sludge dewatering drying equipment and technology.

The general paste sludge that can only obtain moisture content 75-80% of mechanism filter-pressing dehydration of water-containing sludge, therefore heating is dry Drying process be it is presently most used dehydrate means, its technological principle is：It is normal that heating medium transmission heating is provided by outside By dry wet mud under state, saturation vapourizing temperature (100 degree or so), the water of Sludge Surface are reached when wet mud is heated temperature Part will first be vaporized under heat power driving and be taken away along carrier gas, after Sludge Surface moisture is evaporated, surface of material Humidity will be less than humidity inside material, now, under the promotion of outside heating-up temperature, the internal temperature of sludge continues to carry Rise, driving internal moisture vaporization is transferred to surface and taken out of by carrier gas, so constantly carry out heat exchange to complete the company of sludge Air-introduced machine is needed to divulge information carrier gas so as to by the gas of the saturation shape steam of generation and heated volatilization in continuous drying and dehydrating, drying process Together extract out.Sludge in heat drying process, carrier gas can carry secretly a small amount of ammonia given off in sludge, methane, normal heptane and The pernicious gases such as ethene, ammonia belongs to foul gas.Therefore, sludge is during dehydrating, to prevent secondary pollution, needs collection Middle suction mix waste gas (vapour), prevents that gas (vapour) is let out in vitro at drying equipment feed inlet and outlet, and not coagulating to mix waste gas (vapour) Gas uses the harmless treatment such as high temperature incineration or deodorization adsorption tower, meanwhile, it is useless in mixing to drying the entrainment with steam produced In (vapour), it is necessary to by gaseous mixture (vapour) body by condensing plant reduction be condensed into waste liquid, due to waste liquid can be entrained with volatile matter and A small amount of sludge composition, and COD, BOD5, ammonia nitrogen, suspension and heavy metal isoconcentration are high in waste liquid, thus these waste liquids be connected to it is useless Water collecting pit simultaneously send sewage treatment plant to handle.

At present, domestic and international common sludge drier is dried by revolution drum drier, butterfly drying machine, hollow paddle type Machine, disk drying machine etc..The process that dehydrates of sludge is completed under normality air pressure, under normality air pressure operating mode, moisture content Saturation evaporating temperature is 100 degree, existing equipment and technological equipment, and yield is dried to improve sludge dewatering, can only be changed by increase Heat exchange area makes drying equipment and auxiliary equipment build huge with load volume is improved, in normality drying process, sludge moisture content Evaporation and the temperature difference for heating medium are smaller, and heat exchange utilization ratio is low, and the time dehydrated is longer, improve heating medium temperature again The problem of equipment and materials selection and high equipment cost can be caused, can also cause the potential safety hazards such as dewatered sludge spontaneous combustion, generally assure that steaming The heating medium of vaporization temperature and pressure intensity needed for hair is more than 130 degree, and heating media discharge temperature is more than 100 degree, and waste heat is a large amount of Emptying is wasted, and it is poor to there is utilization efficiency of heat energy, the problem of drying cost is high.

Common sludge drier and technique are as shown in figure 3, heating steam is conducted heat by the heat-transfer surface of sludge drier To sludge, the wet mud being continuously added by drying equipment gyroaxis blade stirring and constantly promote, air-introduced machine passes through carrier gas port Volatilization gas is extracted out in the steam and sludge that air intake evaporates heated sludge, while keeping hothouse tiny structure, prevents from importing and exporting Spill waste gas (vapour) at the imprecision such as material mouth and aperture of door and secondary pollution, gaseous mixture (vapour) body that blower fan is extracted out is through cyclone separator The most of dry particl thing carried out is separated, reduction dry particl is condensed the risk of water felt jam in air channel, mixes Close the moisture condensation after gas (vapour) condensed device in gaseous mixture (vapour) and be discharged into cesspool into waste liquid, substantial amounts of waste gas is then through air-introduced machine It is sent to emission-control equipment (most of to burn, rich part is discharged into air after adsorption tower deodorization).So circulation, successively Completion sludge dehydrate.

Above-mentioned drying process is completed under normal conditions, and the waste gas (vapour) that blower fan is extracted out contains the wet of sludge moisture content vaporization generation Steam and take the load vapour air, the on-condensible gas in sludge and drying machine of these moistures out of and the aperture of door such as import and export and leak out, big Gaseous mixture (vapour) amount produces higher duct velocity, and high wind speed is also easily together taken tiny dewatered sludge particle out of drying and set It is standby, though the cyclone separator of outlet can remove part flying dust, but the flying dust not eliminated is had with gas (vapour) stream condensation Wind pipe is blocked, it is necessary to which user periodically shuts down cleaning, changes and safeguard.Sludge dewatering drying process under normality air pressure, vaporization Dry required evaporating temperature and condensation temperature are higher, dry evaporation and condensation is also required to larger heat exchange (cold) area, because Cost needed for the bulky of this drying equipment and process system, overall cost and energy source and power consumption is high, in addition it is also necessary to larger Workplace could arrange this kind of drying device and system.

The content of the invention

Regarding the issue above, the present invention provides one kind under vacuum conditions can take off aqueous liquid continuous gasifying Equipment and process unit that water is dried.The present invention using under high vacuum state, liquid have relatively low saturation evaporating temperature and its The high thermal conductivity and heat exchange efficiency of phase transformation, make the moisture content in water-containing sludge under the conduction of heating medium temperature, rapidly compared with Explosive evaporation is vapour phase under low vapourizing temperature, and is quickly transferred in the vacuum cavity of resistance very little the low of condenser apparatus Wen Duan, is rapidly conducted to recirculated cooling water by heat and is condensed into liquid rapidly, make aqueous liquid contained by moisture content realize that liquid phase is arrived Vapour phase arrives the rapid phase transition transfer of liquid phase again, realizes that low consumption under vaccum working condition, quick, high-efficiency dehydration are dried.

Under vacuum state, the principle that low consumption, quick, high-efficiency dehydration are dried is:Normality operating mode, a standard atmospheric pressure is (absolutely To pressure about 0.1Mpa) when, the vaporization boiling temperature needed for water is 100 degree, and in absolute pressure 0.004Mpa vacuum state Under, as long as 29 degree or so of water will vaporize boiling, during absolute pressure 0.025Mpa vacuum, water also can be in 65 degree or so vaporization boilings Rise.Therefore, water-bearing media is vaporized to dry phase transformation space sealing, when maintaining vacuum state by air extractor, be can be achieved with Dried object matter institute's water content seethes with excitement under relatively low heating-up temperature to be vaporized and evaporates.Under vacuum environment, phase transition process has heat The characteristics of small, thermal conductivity is high, isothermal is good is hindered, several times of even several vaporization phase velocities for decupling normality operating mode can be obtained, made Hydrous matter quick dewatering drying, and the water vapour that vaporization is produced, under vacuum conditions, the condenser that can be moved quickly into Low-temperature receiver end Fast exothermic and be condensed into water and extracted out by water pump.Vacuum dehydration drying equipment and technique compared with normality drying equipment, The temperature difference between low boiling temperature and heating medium temperature becomes big, and the heat transfer of the big temperature difference faster also makes evaporation rate further carry High heat conduction and isothermal under height, vacuum environment will make outside water-bearing media and internal not vaporific moisture content also can quick vapour Change, therefore the dry products of aridity evenly can be obtained.The vacuum drying process of water-bearing media is also because of moisture content vaporization boiling temperature The reduction of degree and improve the heat utilization rate of heating steam, can reduce heating steam waste heat discharge waste, realize aqueous Jie Efficient, energy-saving and environmental protection that matter is dehydrated.

To achieve these goals, the technology taken and application scheme of the invention are：

A kind of vacuum dehydration drying equipment, including Minton dryer shell 1, front end-plate 12 and front axle are sealed seal apparatus 13rd, front support bearing 14, end plate 23 and rear shaft seal sealing device 24, spring bearing 26, evaporation chamber enclosure zone of heating 20, revolution Heated mandrel 2 and heating pusher paddle scraper plate 4, charging pre-heating steam spout 10, condenser casing 6 and condenser device, take out true Empty set of pumps 17, sealed feed arrangement 11 and drawing mechanism 21, drive device 16, condensate pump 18, cooling water system.Institute The shell 1 for the vacuum dehydration drying device stated is closed with evaporation chamber enclosure zone of heating 20 and being combined into one of condenser casing 6 Sandwich type element structure, the axis hole gap that end plate is stretched out at revolution heated mandrel 2 two end being arranged in housing 1 has front axle to be sealed seal apparatus 13 Sealed with rear shaft seal sealing device 24, make to form hermetically sealed heating evaporation between revolution heated mandrel 2 and integrated closed shell Room 27 and vacuum condensation room 8；Described sealed feeder unit 11 and sealed discharging device 21 is respectively arranged on Minton dryer two The feeding mouth 9 at end and discharging opening 22；Described charging pre-heating steam spout 10 is arranged in charging aperture 9, and steam is direct Spray into water-bearing media and heat, the mode of heating of the vacuum dehydration drying device is that revolution heating arrangements and evaporation chamber enclosure add The indirectly heat and charging pre-heating steam spout (10) direct-fired combined heat mode of thermosphere (20).Described taking out is true The exhaust tube of empty set of pumps 17 is connected with the condenser vacuum condensation chamber 8 of vacuum dehydration drying device.Described vacuum dehydration Drying device includes evaporation chamber enclosure 1 and evaporation chamber enclosure zone of heating 20 with turning round heated mandrel 2 and being welded on revolution heated mandrel 2 On the composition of heating pusher paddle scraper plate 4 heating rotary mechanism between heating in vacuum vaporization chamber 27 and be enclosed in vacuum heating chamber On the shell of heating evaporation room 27 in the vacuum condensation room 8 that the condenser casing 6 of 27 peripheries is constituted, described condenser casing 6 Side opens up open ports, and vaporization chamber 27 is connected with vacuum condensation room 8, makes the gas phase after being vaporized in vaporization chamber 27 can be by evaporation The open ports opened up on the upside of room move quickly into the condensation chamber 8 of the periphery of vaporization chamber 27, and described heating rotary mechanism includes revolution Heated mandrel 2, heating pusher paddle scraper plate 4, bitch 5 and drive device 16, described heating pusher paddle scraper plate 4 are surrounded on revolution On heated mandrel 2 and in heating evaporation room 27, the described end of heating in vacuum vaporization chamber 27 2 is respectively equipped with front end-plate 12 and preceding Axle envelope sealing device 13 and end plate 23 and rear shaft seal sealing device 24, described revolution heated mandrel 2 are hollow tubular structure, two There are fore bearing 14 and the support positioning of rear bearing 26 in end, turns round heated mandrel 2 with the circular hole gap of front and rear end plate respectively by front axle It is sealed seal apparatus 13 and rear shaft seal sealing device 24 is sealed, isolation extraneous air enters heating in vacuum by the gap of axle and end plate Vaporization chamber 27；The described installing pre-heating steam of charging aperture 9 spout 10 makes aqueous Jie that steam direct heating enters charging aperture 9 Matter, accelerates the vaporization phase velocity of moisture content in water-bearing media；One end of the revolution heated mandrel 2 is connected with drive device 16；Institute Two end end fittings preceding steam rotary joint 15 and the rear steam rotary joint 25 of revolution heated mandrel are stated, adds the revolution of hollow Hot axle 2 is connected with outside heating medium pipeline.

Described revolution heated mandrel 2 and the mechanism of heating pusher paddle scraper plate 4 is single-shaft configuration or cross-compound arrangement.It is described to add It is that monolithic is fixed on revolution heated mandrel 2 or two angle formulas are weldingly fixed on revolution heated mandrel, institute to pick slurry leaf scraper plate 4 State heating medium passage 29 in the closing inner chamber room formation blade of two compositions of angle formula heating pusher blade scraper plate 4 and be covered in sky Outside the heating medium manhole appendix 28 opened up on core revolution heated mandrel, heating medium passage 29 in blade is set to turn round heated mandrel with hollow The heating medium runner connection of shaft core, angle formula is heated pusher blade scraper plate 4 and hollow heated mandrel turns into heat exchange jointly Part.Described revolution heated mandrel 2 and the outer surface kind of heating pusher paddle scraper plate 4 is implanted with metal catch nail 5, and bitch 5 adds heated Face, the stirring for being dried water-bearing media simultaneously participated in vaporization chamber 27 loosens.Described axle envelope sealing device is filler, elasticity Sealing ring contact seal or steam axle envelope non-contacting seal, described sealed feed arrangement 11 include ram type pump or squeezed Pressure type canned pump, described ram type pump or squeeze pump is connected with the feeding mouth 9 of the front end of heating in vacuum vaporization chamber 27；Described Sealed discharging device 21 includes ram type pump or revolution scraper-type pump, and ram type pump or revolution scraper-type pump evaporate with heating in vacuum The discharging opening 22 of the rear end of room 27 connects.Described evaporation chamber enclosure zone of heating 20 includes heating coil or chuck heating passage, institute Heating coil or chuck the heating passage stated are set around heating evaporation room 27, described heating coil or chuck heating passage with The heating medium runner series connection of heated mandrel 2 or the heating medium different from each connecting are turned round, described heating medium includes low Press steam, hot water, heat carrier conduction oil.The described set of pumps 17 that vacuumizes includes water jet air ejector, stream-jet ejector, Roots Vavuum pump and pipeline, vacuumize set of pumps 17 and are connected by pipeline and vacuum condensation room 8.

Described condenser includes being centered around the shell 6, cold of heating evaporation room 27 and the periphery of evaporation chamber enclosure zone of heating 20 But cooling water inlet and cooling water are connected to before and after water pipe 7, sump 19, condensate pump 18, condenser cooling water pipe 7 Outlet, condensate liquid is pooled to sump 19, and the condensation waste liquid in sump is discharged vacuum condenser by condensate pump 18.

Processing step of the present invention is：Feed slurry liquid or paste water-bearing media pass through plunger type or squash type pump group 11 pressurizations, to seal feed-type feeding heating in vacuum vaporization chamber feeding mouth 9；The water-containing materials of feeding mouth are sent into through feeding pre-add The steam direct heating of the ejection of vapours spout 10 simultaneously loosens water-containing materials, and heating medium turns round heated mandrel 2 by hollow and added Pick slurry leaf scraper plate 4 and evaporation chamber enclosure zone of heating 20 again passes to heat energy continuously extruded add by way of indirectly heat Enter and dried water-bearing media, water-bearing media while being heated and moisture content is vaporized phase desiccation by what the steam of spout 10 was directly preheated And volume is reduced, while the heating pusher paddle scraper plate 4 and the heating stirring of bitch 5 on revolution heated mandrel 2 are lasting past under promoting Discharging opening 22 is moved, and vacuumizes set of pumps 17 by vacuum line by condenser condensation chamber 8 and heating in vacuum vaporization chamber 27 Incondensable gas constantly discharge and maintain vacuum, the moisture content in water-bearing media in heating in vacuum vaporization chamber 27 be heated vaporization phase After change, vapour phase stream is moved quickly to the heat release of condenser cooling water pipe 7 in the presence of temperature differential pressure and is condensed into liquid, and condensation is released The heat put then constantly is taken away by the cooling water that the offside of cooling water pipe 7 in condenser flows through, and water-bearing media is taken off by continued vaporization The discharging opening 22 being finally advanced to by dry low-water-content medium up to heating in vacuum vaporization chamber 27 after water, and it is being arranged in discharging Under the ram type pump or revolution scraper-type pump group 21 of the lower section of mouth 22 are acted on, region of no pressure is sent out in the way of sealed discharging, so not The disconnected continuous vacuum vaporization drying that can complete water-bearing media.

It is of the invention compared with existing dry technology, have an advantageous effect in that：

1st, the present invention is using under vacuum state, moisture content phase transformation at a lower temperature and vacuum environment thermal resistance is small, isothermal is good Principle realize the vaporization drying of water-bearing media, can under relatively low vaporization boiling heating-up temperature, with less heat exchange area and Thermal energy consumption, realizes the rapid phase transition transfer of moisture content in water-bearing media, and its rate of drying and efficiency are far above normality dry technology. The contour structures of drying equipment can be made more to minimize, drying equipment material input and production and processing cost is saved；Can also be abundant Using low-quality heat energy (low-pressure steam, hot water, heat carrier conduction oil), the energy consumption cost that reduction water-bearing media is dried.

2nd, heating in vacuum vaporization chamber 2 of the invention is integrated all-sealed structure with condensation chamber 8, is pressed from both sides only in water-bearing media A small amount of incondensable gas of band is extracted, the vacuum for being greatly improved and maintaining vaporization dry, reduces discharge amount of exhaust gas, vacuum Environment can also reduce taking out of for dry particle thing, therefore, can save carrier gas blower fan, heavy in section load that original dry technology needs Gas (vapour) air channel and waste gas (vapour) Cyclonic separating apparatus, save external equipment arrangement space and metal consumption, discharge amount of exhaust gas Reduction also allows for gas sampling and handles and reduce the processing cost of secondary exhaust gas pollution.

3rd, under vacuum environment the phase transformation of water-bearing media evaporating and dewatering isothermal characteristicses, can steam moisture content inside water-bearing media Vapour, which is injected directly into preheat and heat medium and turn round heated mandrel 2 by hollow and evaporate two surveys inside and outside chamber enclosure zone of heating 20, to be added Quickly escaped under heat transfer, the dried water-bearing media aridity of vacuum vaporization and uniform drying is further enhanced.

4th, under vacuum the vaporization of moisture content low-temperature boiling and condensation phase-change characteristic dries required thermal energy consumption by vaporization is reduced And the cooling water inflow needed for condensation, the utilization ratio of the energy and water resource is improved, a large amount of waste heats row of con-ventional drying equipment is reduced Put and cooling-water consumption, energy-conserving and environment-protective are significant.

5th, vacuum vaporization drying process of the present invention can carry out renovation and improving to existing drying equipment.

Brief description of the drawings

Fig. 1 is the structural representation of present device.

Fig. 2 is the angle formula composite heating pusher blade schematic diagram of present device

Fig. 3 is common sludge drier and process schematic representation.

Embodiment

Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated.

As shown in figure 1, the heating pusher paddle scraper plate 4 that the present invention includes the revolution heated mandrel 2 of hollow and is fixed on axle The rotatable parts and evaporation chamber enclosure zone of heating 20 and front end-plate 12, front axle of composition are sealed seal apparatus 13, end plate 23, rear shaft seal Sealing device 24 constitutes the charging preheating in the heating and evaporating unit of the housing of vaporization chamber 27, the feeding mouth 9 of the front end of vaporization chamber 27 The direct heater of steam nozzle 10, around vacuum heating chamber 27 outside condensation chamber 8 and the condensing unit of cooling water pipe 7, it is outside Set of pumps 17, sealed feed arrangement 11 and drawing mechanism 21 are vacuumized, described heating in vacuum vaporization chamber 27 is by condenser The upside position of vaporization chamber 27 that shell 6 is surrounded opens up open ports and is connected with condenser vacuum condensation chamber 8, vacuum condensation room 8 and The connection of the vacuum line of set of pumps 17 is vacuumized, the described charging pre-heating steam of feeding mouth 9 spout 10 directly adds external Vapours is mixed into the water-bearing media of feeding feeding mouth and completes the preheating to water-bearing media, and described vacuum heater revolution adds Hot axle 2 is supported on by fore bearing 14 and rear bearing 26 on the outside of the front and rear end plate of heated shell 1, revolution heated mandrel 2 and front end-plate 12 and the axis hole gap of end plate 23 seal apparatus 13 is sealed by front axle and rear shaft seal sealing device 24 is sealed, described feed arrangement 11 and drawing mechanism 22 be respectively arranged on the feeding mouth 9 of Minton dryer and discharging opening 22.

Described vacuum dehydration drying device includes heating evaporation room 27 and revolution heated mandrel 2 and heating pusher paddle scraper plate The slew gear of 4 compositions, described slew gear includes the revolution heated mandrel 2 of hollow, heating pusher paddle scraper plate 4, the and of bitch 5 External driver device, described heating pusher paddle scraper plate 4 is surrounded on revolution heated mandrel 2 and in heating evaporation room 27, Described heating pusher paddle scraper plate 4 includes single layer structure or angle formula as shown in Figure 2 is combined paddle blade structure, described vacuum The end of heating evaporation room 27 2 is respectively equipped with front end-plate 12, front axle and is sealed seal apparatus 13 and end plate 23, rear shaft seal sealing device 24, the described hollow revolution end of heated mandrel 2 two and the gyration aperture of end plate are filled by front shaft seal device 13 and rear shaft seal sealing respectively 24 sealings are put, described axle envelope sealing device includes contact filler, sealing ring or contactless labyrinth type steam packing axle envelope, One end of the revolution heated mandrel 2 is connected with drive device 16；Revolution heated mandrel two side heads be provided with it is rotatable before Flexible joint 15 and rear flexible joint 25, rotatable joint connection heating medium inlet and outlet, heating medium flow through returning for hollow The heating pusher paddle scraper plate 4 and bitch 5 for turning the revolution heated mandrel 2 in the heating evaporation room 27 of heated mandrel 2 and being installed on axle.

Described slew gear is single-axle turning structure or dual-axis rotation structure.Described sealed feed arrangement 11 is wrapped Include ram type pump or squeeze pump, described ram type pump or squeeze pump and the pan feeding being connected on heating in vacuum vaporization chamber 27 Mouth 9 is connected；Described sealed drawing mechanism 21 includes ram type pump or revolution scraper-type pump, described ram type pump or revolution Scraper-type pump connects with the discharging opening 22 being connected on heating in vacuum vaporization chamber 27.Described rotating shaft is hollow core structures, and heating is situated between Mass flow makes air-cored axis 2 transfer thermal energy to water-bearing media, revolution heat transfer from inside to outside by tube wall through hollow heating medium runner Part includes revolution heated mandrel 2 and the heating pusher paddle scraper plate 4 and bitch 5 that are looped around in air-cored axis.Described shell heating 20 device of layer include heating coil or jacket type heated shell, and heating medium, which flows through heating coil or chuck inner flow passage, makes heating shell Body transfers thermal energy to the water-bearing media in heating evaporation room 27, described heating coil or jacket type heated shell from the outside to the core Set around heating in vacuum vaporization chamber 1, described heating coil or jacket type heated shell and the runner of hollow revolution heated mandrel 2 Heating medium is connected by the way of serial or parallel connection, heating includes steam, hot water, heat carrier conduction oil with medium.Described Vacuum pump group 17 includes air extractor, pipeline, and vacuum pump group 17 is connected by pipeline and vacuum condensation room 8.

Described condensing unit includes condenser casing 6, cooling water pipe 7, and the described side of condenser two is connected to cold But water inlet, coolant outlet, condenser are connected with condensate liquid sump 19 and connect the outlet of condensate pump 18；It is described Condenser condensation chamber 8 connected with pump-line.

Processing step of the present invention is：Feed for slurry or paste dried water-bearing media by plunger type or Squash type pump group 11 is pressurizeed, to seal feed-type feeding Minton dryer feeding mouth 9；Continuously extruded addition heating in vacuum is steamed The steam direct heating that the water-bearing media of hair room feeding mouth 9 is sprayed by charging pre-heating steam spout 10, aqueous Jie after heating Matter by the heating again of revolution heated mandrel 2 and the housing of chuck zone of heating 20 while made moisture content fast vaporizing phase desiccation and reduced Volume, while in the Repeat-heating stirring and propulsion of the bitch 5 and heating pusher paddle scraper plate 4 being arranged on revolution heated mandrel 2 It is lower to continue to move toward discharging opening 22, set of pumps 17 is vacuumized by vacuum line by condensation chamber 8 and heating evaporation room 27 Incondensable gas is constantly discharged and maintains vacuum, and the moisture content in water-bearing media is heated in heating evaporation room 27 after vaporization phase transformation, Cold end heat release that vapour phase stream is moved quickly in the presence of temperature differential pressure in condenser condensation chamber 8 is simultaneously condensed into liquid, condenses Water, which is pooled to after sump 19, to be condensed water pump 18 and discharges, and is condensed discharged heat and is then constantly disposed in condensation chamber 8 The cooling water of the offside of cooling water pipe 7 is taken away, and the low water-bearing media after evaporating and dewatering is finally advanced to up to heating in vacuum vaporization chamber 27 Discharging opening 22, and send out vacuum in the case where the ram type pump that is arranged in below discharging opening 22 or revolution scraper-type pump group 21 are acted on Area, the vacuum dehydration that so can constantly complete water-bearing media is dried.

From said process, what the present invention was solved be water-bearing media during continuous feed and discharging, keep aqueous Medium vaporizes the necessary vacuum operating mode of dry place, and heating in vacuum vaporization chamber and condenser casing total interface and hole are both needed to Reliable seal approach is taken, outside air is leak into vacuum evaporation room 27 and the region of condensation chamber 8.Carried in water-bearing media Escaping gas and incondensable gas are discharged in time by vacuum lead by vacuumizing pump group 17, to maintain heating in vacuum to evaporate Moisture content phase transformation vaporization and the vacuum needed for condensation chamber adiabatic condensation temperature in room 27.

The vacuum dehydration drying equipment of the present invention uses auger type, oar blade type, disc type, rotating disc type heat drying mode； Heating in vacuum evaporation room housing is all-sealed structure, all suction interfaces opened up, feed inlet and outlet and spies on inspection door on housing Hole all should be tightly connected with external equipment pipeline, and the circular gap of gyroaxis and housing end plate need to install contact filler, sealing Circle or contactless labyrinth type steam packing axle envelope, make extraneous air can not leak into heating in vacuum vaporization chamber and condensation chamber；Revolution The two ends connection heating medium fluid for heating air-cored axis and shell zone of heating chuck or coil pipe is imported and exported.

Utilized for the convenient conveying for drying low water-bearing media, the ram type pump or revolution scraper plate being arranged in below discharging opening Formula pump group discharging opening can complete low water-bearing media using sending out with installation mold by the remaining wet steam and discharge pressure of dried medium Molding, granulating.The vacuum dehydration that so can constantly complete water-bearing media is dried.

Claims (8)

1. a kind of vacuum dehydration drying equipment, including vacuum dehydration drying device shell (1), end plate and axle envelope sealing device, branch Support bearing, evaporation chamber enclosure zone of heating (20), revolution heated mandrel (2) and heating pusher paddle scraper plate (4), heating stirring bitch (5) pre-heating steam spout (10), condenser casing (6) and condenser device, are fed, set of pumps (17), sealing is vacuumized Formula feed arrangement (11) and drawing mechanism (21), drive device (16), condensate pump (18), cooling water system, described vacuum The vaporization chamber of shell (1) and shell zone of heating (20) composition of dewatering drying device is with being enclosed in the condenser of vaporization chamber (27) outside The totally-enclosed shell structure of being combined into one of condensation chamber 8 of shell (6) composition.

2. vacuum dehydration drying equipment according to claim 1, is arranged in the revolution heated mandrel in evaporation chamber enclosure (1) (2) two ends stretch out vaporization chamber end plate axis hole gap have axle envelope sealing device sealing, revolution heated mandrel (2) with it is integrated totally-enclosed Hermetically sealed heating evaporation room (27) and vacuum condensation room (8) is formed between housing, described axle envelope sealing device includes filler, bullet Property sealing ring contact seal or steam axle envelope non-contacting seal, described sealed feeder unit (11) and sealed discharging device (21) feeding mouth (9) and discharging opening (22), described charging pre-heating steam at the end of vacuum dehydration drying device two are respectively arranged on Spout (10) is arranged in charging aperture (9), and steam is injected directly into by steam nozzle (10) and is dried preheating in water-bearing media, The described exhaust tube for vacuumizing set of pumps (17) is connected with the condenser vacuum condensation chamber (8) of vacuum dehydration drying device.

3. vacuum dehydration drying equipment according to claim 1, it is characterised in that described vacuum dehydration drying device bag Include the vaporization chamber and revolution heating axis mechanism of shell (1) and evaporation chamber enclosure zone of heating (20) composition, described revolution heated mandrel Mechanism includes hollow revolution heated mandrel (2), heating pusher paddle scraper plate (4), heating stirring bitch (5) and drive device (16), Described heating pusher paddle scraper plate (4) is surrounded on revolution heated mandrel (2) and in vaporization chamber (27), and described heating is stirred Mix bitch (5) stagger arrangement and be weldingly fixed on revolution heated mandrel (2) and heating pusher paddle scraper plate (4) surface, the revolution heated mandrel (2) two side ends are provided with rotatable joint and are connected with external heating medium pipeline, and arrangement is pre- in described charging aperture (9) Steam nozzle (10) is heated, the steam that spout (10) nozzle sprays, which can be directly mixed in and heat, is sent into being dried for feeding mouth (9) Water-bearing media, the mode of heating of the vacuum dehydration drying device is revolution heating arrangements and evaporation chamber enclosure zone of heating (20) Indirectly heat and charging pre-heating steam spout (10) direct-fired combined heat.

4. vacuum dehydration drying equipment according to claim 1, it is characterised in that the vacuum dehydration drying device shell (1) and evaporation chamber enclosure zone of heating (20) composition vaporization chamber and the vacuum around outdoor condenser casing (6) composition of evaporation The integrated totally-enclosed shell structure of condensation chamber (8), circular vaporization chamber (27) shell (1) top of condenser casing (6) is opened up Open ports, make vaporization chamber (27) be connected with condensation chamber (8).

5. vacuum dehydration drying equipment according to claim 1, it is characterised in that described revolution heated mandrel (2) mechanism is Heating pusher paddle scraper plate on revolution heated mandrel (2) described in single-axle turning heating arrangement or dual-axis rotation heating arrangement (4) it is single chip architecture or two angle composite constructions, the interior heating medium runner formed of two angle composite constructions blade It is connected with turning round the heating medium manhole appendix (28) opened up in heating air-cored axis, revolution is heated air-cored axis and is combined with angle and add Pick slurry leaf scraper plate (4) and be fixed on the bitch (5) on its surface and be combined into heat transfer slew gear.

6. vacuum dehydration drying equipment according to claim 1, it is characterised in that described sealed feed arrangement (11) Including ram type pump or squeeze pump, the feeding mouth that described ram type pump or squeeze pump is connected with heating in vacuum vaporization chamber (9) connect；Described sealed drawing mechanism (21) includes ram type pump or revolution scraper-type pump, described ram type pump or returns Turn the discharging opening (22) that scraper-type pump communicates with heating in vacuum vaporization chamber to connect.

7. vacuum dehydration drying equipment according to claim 1, it is characterised in that described evaporation chamber enclosure zone of heating (20) heating coil or jacket type zone of heating are included, described heating coil or jacket type zone of heating are around heating in vacuum vaporization chamber (27) set, medium runner one kind heating medium of described heating coil or jacket type zone of heating and revolution heated mandrel (2) Connection in series-parallel or two kinds of different heating media are individually connected, described heating medium include steam, hot water, heat carrier conduction oil, Electrical heating elements.

8. vacuum dehydration drying equipment according to claim 1, it is characterised in that described vacuumizes set of pumps (17) Including water jet air ejector, stream-jet ejector, Roots vacuum machine, pipeline, after air-extractor serial or parallel connection by vacuum pipe with Vacuum condensation room (8) is connected.