CN204125400U - The device of normal hexane is refined in mixed vegetable oil - Google Patents
The device of normal hexane is refined in mixed vegetable oil Download PDFInfo
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- CN204125400U CN204125400U CN201420545724.XU CN201420545724U CN204125400U CN 204125400 U CN204125400 U CN 204125400U CN 201420545724 U CN201420545724 U CN 201420545724U CN 204125400 U CN204125400 U CN 204125400U
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Abstract
The device of normal hexane is refined in a kind of mixed vegetable oil, comprise mixed vegetable oil tank (1), vapour compressor (4), first vaporizer (2), second vaporizer (5), first vapour liquid separator (3), second vapour liquid separator (6), the corresponding connection of mixed vegetable oil tank (1) aforesaid device siphunculus, the liquid-phase outlet of described second vapour liquid separator (4) is connected with stripping tower (7) by pipeline, be connected with condensate drum (8) import by pipeline with the chamber exit (22) of first vaporizer (2) of intracavity inter-connection in described first vaporizer (2), be connected with condensate drum (8) import by pipeline with the chamber exit (52) of second vaporizer (5) of intracavity inter-connection in described second vaporizer (5), in condensate drum condensate drum (8), the liquid of condensation is normal hexane liquid.The utility model reasonable in design, greatly reduces equipment operating load and cost, and evaporation technology is stablized, and oil quality ensures, meets the requirement of energy-conserving and environment-protective, has good economic benefit.
Description
Technical field
The utility model relates to the device refining normal hexane in a kind of mixed vegetable oil, namely processes the device that low-consistency plant miscella evaporation refines normal hexane wherein.
Background technology
In oil product use procedure, a large amount of mixed vegetable oil evaporations can be produced, oils meeting contaminated land itself and waters, impurities has larger harm to human health and ecotope, especially lower concentration oil product wherein, due to its volatile and be more prone to enter surrounding environment, and severe contamination is caused to environment.The composition of this kind of mixed vegetable oil evaporation is very complicated, and the difference on purpose according to oil density in collection process is roughly divided into lower concentration, and (density is less than 1.0g/cm
3) and high density (density is greater than 1.0g/cm
3) mixed vegetable oil evaporation.
Existing application number is that 96119130.9 Chinese invention patent applications disclose " technique and device that a kind of waste oil regeneration is neutral oil and bright stock ", its technical process is: first by waste oil, carclazyte, vapour three-phase mixed transferring, in tube furnace circulation refining and distilling tower, be heated to 300 DEG C, flash off moisture, solar oil; Then oil with soil proceeds to second tube furnace circulation refining and distilling tower, and oil, soil, vapour three-phase heat and be refined to 400 DEG C under violent turbulent state; Last heat exchange is filtered after being cooled to 130 DEG C, obtains neutral oil and bright stock.Though the ripe application of this technology, but it is owing to directly processing mixed vegetable oil evaporation, first do not classify, add processing load when using this technique to process when low-consistency plant miscella evaporation component is more, cause running cost to increase.
Summary of the invention
Technical problem to be solved in the utility model is to provide the device refining normal hexane in a kind of mixed vegetable oil, adopts vapour compressor to process low-consistency plant miscella evaporation recovery normal hexane wherein, effectively reduces operating load, reduces running cost.
The utility model solves the problems of the technologies described above adopted technical scheme: the device refining normal hexane in this mixed vegetable oil, comprise vaporizer, it is characterized in that: described device also comprises vapour compressor, vapour liquid separator, described vaporizer is made up of the first vaporizer and the second vaporizer, described vapour liquid separator is made up of the first vapour liquid separator and the second vapour liquid separator, the mixed vegetable oil tank being equipped with mixed vegetable oil is connected with the heat transfer tube import of the first vaporizer by pipeline, the heat transfer tube outlet of described first vaporizer is connected by the import of pipeline with the first vapour liquid separator, the gaseous phase outlet of the first vapour liquid separator is connected with the first inlet mouth of vapour compressor by pipeline, and the liquid-phase outlet of the first vapour liquid separator bottom is connected with the heat transfer tube import of the second vaporizer by pipeline, the heat transfer tube outlet of the second vaporizer is connected by the import of pipeline with the second vapour liquid separator, the gaseous phase outlet of described second vapour liquid separator is connected with the second import of vapour compressor by pipeline, the liquid-phase outlet of described second vapour liquid separator is connected with stripping tower by pipeline, be connected with the first inlet mouth in described vapour compressor first exports the inner chamber import carrying out the first vaporizer of heat exchange by pipeline and the heat transfer tube in the first vaporizer is connected, chamber exit in described first vaporizer is connected with condensate drum import by pipeline, be connected with the second import in described vapour compressor second is exported and can be connected with the inner chamber import that heat transfer tube carries out the second vaporizer of heat exchange with the second vaporizer by pipeline, chamber exit in described second vaporizer is connected with condensate drum import by pipeline, in condensate drum, the liquid of condensation is normal hexane liquid.
As improvement, described heat transfer tube can be preferably column heat transfer tube.
As improvement, in described first vaporizer, heat transfer tube outlet is positioned at the first vaporizer top or top.
As improvement, the top of described condensate drum also can be provided with the offgas outlet of non-condensable gas, and this offgas outlet is connected with tail gas recycle portion by pipeline.
As improvement, the bottom of described condensate drum is also connected with normal hexane wet tank by pipeline, and the pipeline between condensate drum and normal hexane wet tank is provided with transferpump.
As improvement, described vapour compressor can be preferably MVR vapour compressor, and MVR vapour compressor is electric drive, and adopts the MVR vapour compressor that can improve the isoentropic compression technology of normal hexane vapor temperature and pressure.
As improvement, described vapour compressor can be preferably centrifugal vapor compressor or Roots type vapour compressor.
As improvement, in described vaporizer, may be selected to be the column interchanger adopting falling film type, rise membrane type, self-circulation type or forced cyclic type structure.
As improvement, the gaseous phase outlet of described first vapour liquid separator can be preferably placed at the case top of the first vapour liquid separator.
As improvement, the gaseous phase outlet of described second vapour liquid separator can be preferably placed at the case top of the second vapour liquid separator.
Compared with prior art, the utility model has the advantage of: by mixed vegetable oil first by vaporizer, vapour liquid separator classification, low-consistency plant mixing oil adopts vapour compressor evaporation recovery normal hexane wherein, is delivered to distillation tower and carries out advanced treatment after high density mixed vegetable oil evaporation mixing; Vapour compressor electric drive, running cost is low, often reclaim ton solvent only power consumption be about 20kw.hr, recycle as miscella evaporation heating source in the housing that the compression normal hexane liquid vapour produced enters vaporizer, make miscella evaporation process need not any open steam or indirect steam, saved a large amount of raw steam needed for miscella evaporation solvent recuperation, direct economic benefit is huge; After adopting Pistonless compressor, decrease steam usage quantity, with after evaporation, normal hexane waste heat is after overdraft, and heat the first vaporizer and the second vaporizer, heat energy is fully utilized, thus reduces production cost; Vaporizer is the well heater of mixing oil solvent evaporation in addition, it is again the condensate drum of the normal hexane steam evaporated, mixing oil solvent absorbs heat evaporation in heat exchanger tube pass, exothermic condensation in secondary normal hexane vapor heat exchanger housing after compression, do not need a large amount of cooling solvent vapo(u)r recirculated water, make cooling water amount decline 20% ~ 40%.The utility model reasonable in design, greatly reduces equipment operating load, reduces electricity, the cost such as water, steam, and evaporation technology is stablized, and oil quality ensures, meets the requirement of energy-conserving and environment-protective, has good economic benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
As shown in Figure 1, the device of normal hexane is refined in the mixed vegetable oil of the present embodiment, comprise vaporizer, described device also comprises vapour compressor 4, vapour liquid separator, described vaporizer is made up of the first vaporizer 2 and the second vaporizer 5, described vapour liquid separator is made up of the first vapour liquid separator 3 and the second vapour liquid separator 6, the mixed vegetable oil tank 1 being equipped with mixed vegetable oil is connected by the heat transfer tube import of pipeline with the first vaporizer 2, the heat transfer tube outlet of described first vaporizer 2 is connected by the import of pipeline with the first vapour liquid separator 3, the gaseous phase outlet 31 of the first vapour liquid separator 3 is connected with the first inlet mouth 41 of vapour compressor 4 by pipeline, and the liquid-phase outlet of the first vapour liquid separator 3 bottom is connected by the heat transfer tube import of pipeline with the second vaporizer 5, the heat transfer tube outlet of the second vaporizer 5 is connected by the import of pipeline with the second vapour liquid separator 6.Described heat transfer tube is column heat transfer tube.The gaseous phase outlet 61 of described second vapour liquid separator 6 is connected with the second import 43 of vapour compressor 4 by pipeline, the liquid-phase outlet of described second vapour liquid separator 4 is connected with stripping tower 7 by pipeline, be connected with the first inlet mouth 41 in described vapour compressor 4 first exports the 42 inner chamber imports 21 carrying out the first vaporizer 2 of heat exchange by pipeline and the heat transfer tube in the first vaporizer 2 is connected, chamber exit 22 in described first vaporizer 2 is connected with condensate drum 8 import by pipeline, be connected with the second import 43 in described vapour compressor 4 second exports 44 can be connected with the inner chamber import 51 that heat transfer tube carries out the second vaporizer 5 of heat exchange with the second vaporizer 5 by pipeline, chamber exit 52 in described second vaporizer 5 is connected with condensate drum 8 import by pipeline, in condensate drum 8, the liquid of condensation is normal hexane liquid.In described first vaporizer 2, heat transfer tube outlet is positioned at the first vaporizer 2 top or top.The top of described condensate drum 8 is provided with the offgas outlet of non-condensable gas, and this offgas outlet is connected with tail gas recycle portion 9 by pipeline.The bottom of described condensate drum 8 is connected with normal hexane wet tank 81 by pipeline, and the pipeline between condensate drum 8 and normal hexane wet tank 81 is provided with transferpump.Described vapour compressor 4 is MVR vapour compressor, and MVR vapour compressor is electric drive, and adopts the MVR vapour compressor that can improve the isoentropic compression technology of normal hexane vapor temperature and pressure.Described vapour compressor 4 is centrifugal vapor compressor or Roots type vapour compressor.Adopt falling film type in described vaporizer, rise membrane type, the column interchanger of self-circulation type or forced cyclic type structure.The gaseous phase outlet 31 of described first vapour liquid separator 3 is positioned at the case top of the first vapour liquid separator 3.The gaseous phase outlet 61 of described second vapour liquid separator 6 is positioned at the case top of the second vapour liquid separator 6.
Concrete technical process is: the low-consistency plant miscella evaporation in mixing oil storage tank enters tube side the vertical shell and tube heat exchanger 1 placed from top, low-consistency plant miscella evaporation through heating enters vapour liquid separator 2 by the bottom low-consistency plant mixing oil outlet 13 of shell and tube heat exchanger 1, in the flash distillation of two-phase interface place, normal hexane steam after evaporation flashes off from vapour liquid separator 2 top, and enter vapour compressor 3 and carry out mechanically compress and be treated to compression normal hexane liquid vapour, this compression normal hexane liquid vapour enters shell side shell and tube heat exchanger 1 as thermal source from the upper end sidepiece interface of shell and tube heat exchanger 1, condensate drum 4 is entered into from the outlet of normal hexane liquid vapour after having heated tube side fluid, non-condensable gas is extracted out from tank body top and is carried out tail gas recycle portion 10, tank base transferpump 5 is drawn to normal hexane wet tank 6, the high concentration components that low-consistency plant mixing oil evaporates from vapour liquid separator 2 flows out from the mixing oil outlet 22 bottom vapour liquid separator 2, exports 12 high density mixed vegetable oils out evaporate by carrying out advanced treatment to distillation tower 8 after mixing oil pump 6 and mixing with high density mixed vegetable oil bottom shell and tube heat exchanger 1.
Below vapour compression technology is further described;
One, mechanical vapor recompression technology summary
During function of mechanical steam recompression, the vapour compression steamed by vaporizer by mechanically operated compressor is to elevated pressures, and the machine that therefore recompresses also carrys out work as heat pump, increases energy to steam.
With contrary with the compressing hot pump of circulation technology fluid (i.e. closed system, refrigeration cycle), because vapour compressor carrys out work as open system, therefore special compressing hot pump can be regarded as.
The contrast of open compressing hot pump and closed compressing hot pump shows: the evaporator surface in open system instead of the function of process fluid expansion valve in closed system substantially.
By using relatively few energy, the mechanical energy of the compressor namely in compressing hot pump situation, energy to be added in technique heating medium and to enter continuous circulation.In the case, do not need primary steam as heating medium.
In multiple-effect thermodynamic steam recompression system, heat of condensation to be released is still very high.In multiple-effect device, if there is n to imitate, heat of condensation is about the 1/n of primary energy input.And steam-jet ejector can only compress the secondary steam of a part, and the energy of power steam must as Decay heat removal to water coolant.But the use of open compressing hot pump principle can significantly reduce the heat even eliminated and discharged by condenser.
For reaching final thermal equilibrium, a small amount of dump energy or the condensation of residue vapor may be needed, therefore allowing constant pressure ratio and stable operational condition (for centrifugal).
Adopt the reason of function of mechanical steam recompression:
■ specific energy consumption is low;
■ makes the evaporation of product gentle because the temperature difference is low;
■ makes the product residence time short due to conventional single-action;
■ technique is simple, practical;
■ sub-load service performance is excellent;
■ running cost is low.
The advantage of MVR evaporation technique:
MVR: the abbreviation being steam mechanical recompression (mechanical vapor recompression).
1) the general facilities project that floor space is little, operator are few, supporting is few;
2) system is without the need to steam raising;
3) without the need to condenser system, without the need to recirculated cooling water;
4) extremely low energy consumption;
5) vaporization temperature can regulating and controlling arbitrarily, is particularly suitable for the concentrated of the material of temperature-sensitive character or crystallization, and without the need to refrigated cooling water under low-temperature evaporation state, intensity of greatly reducing investment outlay.
Two, MVR evaporates recompression Application Areas
1. food and drink industry (evaporation of milk, fruit juice, whey, sugar soln);
2. chemical industry (evaporation of the aqueous solution);
3. sea water desaltination industry;
4. salt industry (evaporation of salts solution);
5. environmental technology (waste water concentrated);
6. and other need the field of evaporation concentration.
Three, process flow diagram (sodium chloride solution evaporative crystallization is example, steam output: 6000kg water/h):
Design summary
According to the data provided, carry out the calculating of being correlated with and design effort, determine the parameter of relevant device and the type of vaporizer.The aim of this programme reaches evaporation separating effect by minimum running cost and best solution, reduces production cost, reduces the object of environmental protection pressure.
Within the scope of vaporization temperature, the little and material boiling point of the change of the solubility with temperature of solute rises higher.Conceptual level rises as theoretical basis using the solution boiling point that normal pressure saturated mode boiling point is the highest.In the program, value is that NaCl28.9% solution boiling point rises about 10 DEG C, terminal.
System evaporator section terminal is for containing 20% crystallization magma therefore selecting MVR-FC continuous crystallizing system, MVR system, coupled FC crystallizer, organism in system can produce in the process of evaporation concentration to be piled up, because pump flow is relatively high, so when viscosity and viscosity change greatly, still can design higher velocity in pipes, with the Reynolds number reduction of offsetting because viscosity causes, fluid turbulent degree be reduced, the impact that K value reduces.Higher flow velocity also can reduce fouling tendency simultaneously, extends the cleaning interval.Larger and suitable flow is also the prerequisite controlling material crystallizing metastable zone, for the crystal growing suitable yardstick creates condition.Separate unit positive-displacement compressor selected by compressor, and fluid, when interchanger admission liquid crystallizer, adopts the mode of central charging.Because supplied materials does not have thermo-sensitivity, optional vaporization temperature is any, and it is 85 DEG C that design is fixed tentatively.The water capacity of material that can make higher centrifuging temperature reduces thus this case and selects high temperature centrifugation, centrifuging temperature 85 DEG C.
1, basic procedure
(1), material flow:
First material reclaims phlegma sensible heat from head tank through preheater, pump circulation device circulation tube is pumped into by feedstock pump, separator evaporation is entered after interchanger heats up, solution is in the flash distillation of two-phase interface place, after evaporation, solution flows downward immediately to be mixed into fresh feed liquid and once circulates under the attraction of forced circulation pump, discharging after discharging to be achieved requires.
(2), steam flow:
Secondary steam in pump circulation separator moves upward and enters Roots type vapour compressor, and compressor returns pump circulation heat exchanger shell pass release latent heat after secondary steam is compressed to technological design temperature, water of condensation enters lime set holding tank.
(3), crystallizer:
Enter crystallizer evaporation after feed liquid heater via heat temperature raising, evaporative process is carried out continuously under fully-closed state, and in equipment, temperature, pressure and feed concentration all can remain on the state being most appropriate to evaporate.Crystallizer inside is provided with efficient mist eliminator, can improve vapor-liquid separation efficiency, reduces entrainment.
Crystallizer inside is provided with spray equipment, and it has two effects, and one is washing mist eliminator, and two is avoid material wall built-up.
Crystallization material selection 316L.
(4), well heater:
Adopt shell and tube heat exchanger.Due to the effect of MVR, be material heater, be also the condenser of secondary steam simultaneously.The features such as have heat transfer efficiency high, floor space is little, and equipment price is low.
In the process of evaporation, partial organic substances can stick in decline heat transfer tube inwall causing convective heat-transfer coefficient in pipe gradually, K value is caused to decline to a great extent, interchanger moved to both sides below crystallizer for ease of this design of the cleaning in operational process from now on to use and be flexible coupling, be convenient to maintenance from now on.
Well heater selects material to be heating tube Ta2, housing 316L.
(5), vapour compressor:
Adopting is all steel Roots type vapour compressor that vapour compression designs specially, has noise little, shakes little, high reliability.
Compressor material: 316L.
(6), vacuum system:
Vacuum system selects water-ring vacuum pump, has the features such as air-breathing is even, stable working is reliable, simple to operate, easy to maintenance.
Because vacuum pump itself causes the known water having part of the principle of vacuum to discharge with vacuum pump air outlet, in this design, vacuum pump cooling water circulation is used, not only ensured the usage quantity improving but also reduce to greatest extent water of system vacuum.
2, flow-interpret
Treating material is stored in regulating tank, squeezes into vapo(u)rization system by pump.Solution squeezes into plate-type heat exchanger by fresh feed pump, and in plate-type heat exchanger, in feeding liquid and vaporizer, steam condensate carries out heat exchange, after feeding liquid preheating, enters vaporizer and evaporates.
From crystallizer secondary steam out, enter MVR compression system.After secondary steam is compressed, temperature can be elevated to about 91 DEG C, and the steam after compression enters heater heats material again.In the process of heated material, this part vapor condensation becomes water and is discharged by distilled water pump, and its temperature is about 91 DEG C, and now interchanger is not only as the well heater of material but also the water cooler as steam after pressure.
After material after preheating enters vaporizer, and the secondary steam after compression after temperature rise carries out heat exchange, and whole system reaches thermal equilibrium, does not now need outside fresh steam to heat, only needs compressor to maintain the thermal equilibrium of whole system.
When the organic content in system reaches higher concentration, open MVR system and determine waste discharge material.
3, the chain control of vapour compressor
For find to occur in compressor operating abnormal conditions, equipment loss early warning is provided and prevents the physical abuse of equipment, need monitoring equipment safety.
Fan blade rotating speed
Rotating speed carrys out continuously measured by a velocity gauge.Compressor needs overspeed protection, especially under the operating mode of frequency transformer operation.Warning is provided in short period of time before reaching maximum permissible speed.When reaching maximum permissible speed, motor automatic stop.
Vibration monitoring
The kinetic characteristic of vibration monitor system monitoring swivel arrangement.Close to bearing place, sensor is being installed for this reason.The amplitude of vibration is determined by many factors, such as:
The rotating speed that ■ is relevant;
The state of ■ bearing;
The state (incrustation/fouling) of ■ impeller;
The load that ■ needs by technique and frequently changes.
When reaching maximum allowable vibration alarm; System emergency can be caused when exceeding the maximum to stop.
Oil tank liquid level
Oil level in lubrication box is examined.Warning is sent when oil level is down to minimum level.
Oil pump
The running of oil pump is monitored.The fault of pump will cause stopping in emergency of compressor.When normal compressor stops, oil pump works on and at least will arrive swivel arrangement and stop completely after 5min.For security consideration, except direct-connected main oil pump, be also equipped with an auxiliary oil pump.
Oil cooler
The circulation line of oil is installed the cooling that an interchanger is used for oil, and water coolant supply interchanger is as heat-eliminating medium.Keep oil temperature constant with a temperature control loop.
Purolator pressure reduction
The pressure reduction of purolator to be detected and at the alarm that transfinites.Stopping in emergency of compressor can be triggered when the force value in oil system is reduced to below minimum pressure.The flow of oil is monitored oil pressure.
Bearing temperature
Compressor shaft operates on bearing.The temperature of new bearing is more much lower than maximum permissible value.When reaching a high temperature, first can report to the police.When reaching maximum allowable temperature, for avoiding causing damage to axle and fan blade, system is shut down rapidly.
Motor coil temperature
Drivingmotor needs overheating protection.For this reason, drivingmotor is equipped with temperature sensor, in different positions measuring coil temperature.The too high meeting of temperature causes motor failure.
Motor bearing temperature
For larger power of motor, such as, be greater than 100kW, measure and monitoring motor bearings temperature.
Compression case temperature
Due to compression work, compressor housing also can transported medium heating.Case temperature may be caused in situations too high:
■ suction pressure is too high, so the density of delivery medium is also too high;
■ compressor operates when not having delivery medium;
■ compressor is with circulation pattern running (by-pass valve of compressor is opened).
The temperature of housing is recorded and monitors.First too high case temperature causes reporting to the police, and then stops in emergency.Inject water of condensation at impeller of blower inlet/outlet place, steam is reached capacity state, this reduces too high case temperature.
The axial position indicator of axle
For preventing the wearing and tearing gradually of bearing from causing larger damage, sometimes to monitor the axial displacement of axle.If reached capacity, compressor can auto stop.
4, processing parameter and energy consumption
| Title | Parameter |
| Solute | NaCl |
| Content (m%) | 20％ |
| Boiling point liter (DEG C) | 10 |
| Steam output (kg/h) | 6000 |
| Compressor power consumption (kW) | 300 |
| Feed temperature (DEG C) | 85 |
| Secondary steam temperature (DEG C) | 75 |
| Temperature (DEG C) after secondary steam pressure | 91 |
| Heat interchanging area (m2) | 600 |
Compressor parameter:
| Project | Unit | Parameter |
| Compressor form | ? | Positive displacement |
| Compressor model | ? | LC110-110 |
| Rotating speed | rpm | 980 |
| Compressor normal flow | m3/hr | 39600 |
| Media name | ? | Water vapor |
| Medium molecule amount | ? | 18 |
| Mass of medium flow | kg/hr | 6000 |
| Suction port of compressor flow | m3/hr | 31005 |
| Compressor inlet temperature | ℃ | 75 |
| Compressor inlet pressure | kPa | 38.5 |
| Compressor outlet temperature of saturation | ℃ | 91 |
| Compressor delivery pressure | kPa | 72.8 |
| Compressor internal drag | kPa | 5 |
| Compression ratio | Doubly | 2.02 |
| Rated output | kw | 300 |
| Power of motor | kw | 360 |
Four, Energy Consumption Economy calculates
Be 7500kg/h according to inlet amount per hour, steam output is 6000kg/h, and going out salt amount is 1500kg/h.
1.MVR system and traditional triple effect working cost contrast.
In this design, traditional triple effect steam evaporator working cost of MVR system total evaporation load and equal evaporation load contrasts.
Due to the latent heat of the secondary steam that MVR system does not make full use of, and no longer need cooling circulating water, as can be seen from triple-effect evaporator economic comparison, process cost 313.6 ten thousand yuan can be saved every year after using MVR system, and the price of compressor is 2,000,000 yuan, meaning the investment of 8 months i.e. recoverable compressors that come into operation.
2. use the social benefit of MVR system
Use MVR system to replace traditional multi-effect evaporation system, not only have significant economic benefit, and also have huge social benefit.
Can learn from " MVR system and triple-effect evaporator economic comparison ", to this evaporation demand, former triple-effect evaporator needs steam 3t/h, recirculated water 90m3/h, MVR system needs electric energy 275kw.h.
By National Standard of the People's Republic of China GBT50441-2007 " petrochemical complex design energy consumption calculation standard ", the energy reduced value of steam is that 103kg marks coal/ton, and recirculated water is that 0.143kg marks coal/ton, and electricity is 0.371kg mark coal/kw.h, then:
Triple-effect evaporator energy reduced value=3 × 103+90 × 0.143=318.9kg marks coal/h;
Energy reduced value=300 × the 0.371=111.3kg of MVR system marks coal/h;
MVR system marks coal/h than triple-effect evaporator saving mark coal=318.9-111.3=207.6kg;
That is, MVR system can save mark coal 207.6/318.9=65.1% than triple-effect evaporator;
Run 7920 hours per year to calculate;
Mark coal=207.6 × 7920=1644.2 ton can be saved every year;
Every year can reducing emission of carbon dioxide=1644.2 × 2.62=1651.6 ton;
Every year can reducing emission of sulfur dioxide=1644.2 × 8.5=13974.7kg;
Oxynitride=1644.2 × 7.4=12167.1kg can be reduced discharging every year;
Long (m) × wide (m) × height (m)=10 × 10 × 18 of installation space scope.
The key point of device of the present utility model is:
1, use MVR vapour compression machine technology, isoentropic compression, improve the temperature and pressure of secondary solvent steam, recycle as miscella evaporation heating source.
2, tube still heater (falling film type, rise membrane type, self-circulation type and forced cyclic type etc.) is the well heater of mixing oil solvent evaporation, is again the condenser of the solvent vapo(u)r evaporated, does not need traditional solvent condenser.
3, solvent condenser heat interchanging area is original 10%.
4, mixing oil solvent absorbs heat evaporation in well heater tube side, and secondary solvent steam heater shell side exothermic condensation after compression, does not need a large amount of cooling solvent vapo(u)r recirculated water.Cooling water amount declines 80% ~ 85%.
5, MVR vapour compressor electric drive, running cost is low, often reclaims 1 ton of solvent only power consumption about 10 ~ 15kw.hr.
6, miscella evaporation process need not any direct raw steam or steam of delivering a child.Saved a large amount of raw steam needed for miscella evaporation solvent recuperation, direct economic benefit is huge.
7, miscella evaporation temperature can set, and lower than former technique vaporization temperature, oil quality is high.
8, adopt falling film evaporator, heat-transfer effect is good, and in equipment, the residence time is short, and mixing oil shortens heat-up time.
9, miscella evaporation heating has a narrow range of temperature (Δ T=7 ~ 20 DEG C), and evaporative process is gentle, ensures oil quality.
10, MVR vapour compressor adopts centrifugal vapor compressor, Roots type vapour compressor and other vapour compressors.
11, miscella evaporation process is negative pressure evaporation process, without air in system, avoids the oxidative deformation of grease.
12, secondary solvent steam is compressed by MVR vapour compressor, compared with utilizing number of times, obtains unlimited repetition time and utilizes with triple effect or multiple-effect evaporator.
13, the technique of traditional plant oil manufacturing enterprise oil extraction system miscella evaporation solvent recuperation has been overturned.
14, saved a large amount of raw steam needed for miscella evaporation solvent recuperation, direct economic benefit is huge.
15, the industry policy of country is met, energy-saving and environmental protection.
Claims (10)
1. in a mixed vegetable oil, refine the device of normal hexane, comprise vaporizer, it is characterized in that: described device also comprises vapour compressor (4), vapour liquid separator, described vaporizer is made up of the first vaporizer (2) and the second vaporizer (5), described vapour liquid separator is made up of the first vapour liquid separator (3) and the second vapour liquid separator (6), the mixed vegetable oil tank (1) being equipped with mixed vegetable oil is connected by the heat transfer tube import of pipeline with the first vaporizer (2), the heat transfer tube outlet of described first vaporizer (2) is connected by the import of pipeline with the first vapour liquid separator (3), the gaseous phase outlet (31) of the first vapour liquid separator (3) is connected with first inlet mouth (41) of vapour compressor (4) by pipeline, and the liquid-phase outlet of the first vapour liquid separator (3) bottom is connected by the heat transfer tube import of pipeline with the second vaporizer (5), the heat transfer tube outlet of the second vaporizer (5) is connected by the import of pipeline with the second vapour liquid separator (6), the gaseous phase outlet (61) of described second vapour liquid separator (6) is connected with second import (43) of vapour compressor (4) by pipeline, the liquid-phase outlet of described second vapour liquid separator (4) is connected with stripping tower (7) by pipeline, be connected with the first inlet mouth (41) in described vapour compressor (4) first exports the inner chamber import (21) (42) being carried out first vaporizer (2) of heat exchange by pipeline and the heat transfer tube in the first vaporizer (2) is connected, chamber exit (22) in described first vaporizer (2) is connected with condensate drum (8) import by pipeline, be connected with the second import (43) in described vapour compressor (4) second exports (44) can be connected with the inner chamber import (51) that heat transfer tube carries out second vaporizer (5) of heat exchange with the second vaporizer (5) by pipeline, chamber exit (52) in described second vaporizer (5) is connected with condensate drum (8) import by pipeline, in condensate drum (8), the liquid of condensation is normal hexane liquid.
2. device according to claim 1, is characterized in that: described heat transfer tube is column heat transfer tube.
3. device according to claim 1, is characterized in that: in described first vaporizer (2), heat transfer tube outlet is positioned at the first vaporizer (2) top or top.
4. device according to claim 1, is characterized in that: the top of described condensate drum (8) is provided with the offgas outlet of non-condensable gas, and this offgas outlet is connected with tail gas recycle portion (9) by pipeline.
5. device according to claim 4, it is characterized in that: the bottom of described condensate drum (8) is connected with normal hexane wet tank (81) by pipeline, and the pipeline between condensate drum (8) and normal hexane wet tank (81) is provided with transferpump.
6. according to described device arbitrary in claim 1 to 5, it is characterized in that: described vapour compressor (4) is MVR vapour compressor, MVR vapour compressor is electric drive, and adopts the MVR vapour compressor that can improve the isoentropic compression technology of normal hexane vapor temperature and pressure.
7., according to described device arbitrary in claim 1 to 5, it is characterized in that: described vapour compressor (4) is centrifugal vapor compressor or Roots type vapour compressor.
8. according to described device arbitrary in claim to 1 to 5, it is characterized in that: adopt falling film type in described vaporizer, rise membrane type, the column interchanger of self-circulation type or forced cyclic type structure.
9., according to described device arbitrary in claim 1 to 5, it is characterized in that: the gaseous phase outlet (31) of described first vapour liquid separator (3) is positioned at the case top of the first vapour liquid separator (3).
10., according to described device arbitrary in claim 1 to 5, it is characterized in that: the gaseous phase outlet (61) of described second vapour liquid separator (6) is positioned at the case top of the second vapour liquid separator (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420545724.XU CN204125400U (en) | 2014-08-14 | 2014-09-15 | The device of normal hexane is refined in mixed vegetable oil |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420475957.7 | 2014-08-14 | ||
| CN201420475957 | 2014-08-14 | ||
| CN201420545724.XU CN204125400U (en) | 2014-08-14 | 2014-09-15 | The device of normal hexane is refined in mixed vegetable oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204125400U true CN204125400U (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420545724.XU Withdrawn - After Issue CN204125400U (en) | 2014-08-14 | 2014-09-15 | The device of normal hexane is refined in mixed vegetable oil |
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| Country | Link |
|---|---|
| CN (1) | CN204125400U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104211552A (en) * | 2014-08-14 | 2014-12-17 | 蔡扬 | Device for extracting n-hexane from plant mixed oil |
-
2014
- 2014-09-15 CN CN201420545724.XU patent/CN204125400U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104211552A (en) * | 2014-08-14 | 2014-12-17 | 蔡扬 | Device for extracting n-hexane from plant mixed oil |
| CN104211552B (en) * | 2014-08-14 | 2015-12-23 | 蔡扬 | The device of normal hexane is refined in mixed vegetable oil |
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