CN1827200A - Solution separation and sea water desalination method - Google Patents
Solution separation and sea water desalination method Download PDFInfo
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- CN1827200A CN1827200A CNA2006100018496A CN200610001849A CN1827200A CN 1827200 A CN1827200 A CN 1827200A CN A2006100018496 A CNA2006100018496 A CN A2006100018496A CN 200610001849 A CN200610001849 A CN 200610001849A CN 1827200 A CN1827200 A CN 1827200A
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Abstract
The invention relates to a method for using constant-temperature distillation device to process solution separation and seawater desalination. Said method stacks several constant-temperature distillation units into tower shape to form a multistage vacuum distillation device; and initials said multistage vacuum distillation device to match the constant-temperature distillation method, the transmission of solution and the regeneration of heat cycle solution to separate the solution and recycle some energy to be used repeatedly; and sets the temperature of each stage of vacuum distillation according to the temperature gradient of heat cycle solution to separate the solution into multistage vacuum distillation. Wherein, the temperature and the pressure of vacuum distillation are decreased with the increase of stage, and since the application ranges of temperature and pressure are increased, the stages can be increased to increase the solution separated by unit energy.
Description
This case is to be 2002.12.12 the applying date, and application number is 02156717.4, and name is called dividing an application of " method and the equipment thereof of solution separation and desalinization ".
Technical field
The present invention relates to a kind of constant temperature way of distillation, and use the multilevel vacuum distilling, cooling of this method, icing solution separation and desalinization and equipment thereof, particularly relate to a kind of vacuum environment that vacuum tank provided of utilizing liquid-discharge vacuumizing method to produce, make de gassed solution through liquid gas interface or liquid-solid boundary and with de gassed solution evaporation, cooling, and the multilevel vacuum distilling, cooling, the icing solution that the freeze method of separating and the method and the equipment thereof of desalinization.
Background technology
Conventional solution isolation technics is widely used in concentrating or the fields such as desalination of seawater of general distillation, soup, and this technology belongs to the separation of solution.
When a large amount of soln using heating being separated, will consume suitable energy for achieving the above object, and uneconomical.For example, in the water desalination, directly heating makes the moisture in the solution become steam, extracting steam out with vavuum pump, need like this to consume very big energy, and salinity will constantly improve in the moisture separating process, need continuous energy input moisture could be separated, this kind mode is very uneconomical.
Again, the various salt crystallizations that produced in high-temperature heating process will produce scale problems in processing procedure, cause the efficient of condenser greatly to descend, and cause the isolated moisture of energy limited, do not meet the demand of a large amount of uses.This shows that above-mentioned conventional method still has many defectives, demand urgently being improved.
Summary of the invention
At first, the invention provides a kind of constant temperature way of distillation, it utilizes constant temperature distillation unit to realize, the described constant temperature way of distillation comprises: implement liquid-discharge vacuumizing method with de gassed solution, set the original state of constant temperature distillation unit, conduit, container for evaporation and condenser that de gassed solution, steam and condensation water are flowed through produce vacuum and airtight; Pressure-regulating valve cuts out, in the container for evaporation of vacuum, inject de gassed solution and reach suitable height.Set the temperature of the vacuum distillation of container for evaporation, make de gassed solution carry out explosive evaporation under the temperature of vacuum distillation, described temperature is lower than the temperature of de gassed solution and thermal cycle solution inflow container for evaporation and liquid gas interface; Balance is kept in the thermal cycle that makes evaporation and condense, and reclaims heat of evaporation and condensation water.Wherein, the liquid that de gassed solution can obtain after the degassing for general mixed solution such as lean solution, soup etc., or the liquid that after the degassing, obtains for seawater.
Simultaneously, the invention provides a kind of constant temperature distillation unit of implementing the constant temperature way of distillation, described constant temperature distillation unit is the constant temperature distillation unit of vacuum cooled, and it comprises: a container for evaporation, described container for evaporation is connected with condenser with the conduit that condenses, and the steam of generation is imported in the condenser; A pressure-regulating valve, be located at the appropriate location of the conduit that condenses, when container for evaporation is depressed at the saturated vapor of the temperature of the vacuum distillation of described setting, the discharge rate of the steam of control container for evaporation, and keep condenser of pressure in the container for evaporation, described condenser is to reclaim the thermal cycle solution of heat of evaporation, through conduit and by-pass valve control, in same traffic inflow and outflow condenser, absorb the heat of evaporation of the steam of container for evaporation generation, improving its temperature, and condensed vapor is condensation water, and permanent set liquid enters in the vacuum tank and reclaims; Utilize low level container and annex thereof, under suitable difference in height, vacuum a plurality of conduits of conduit, container for evaporation and the condenser that de gassed solution, steam and condensation water are flowed through and by-pass valve control; Wherein, each flows into certain flow and flows out described container for evaporation the de gassed solution of uniform temperature through conduit and by-pass valve control thereof.
Described constant temperature distillation unit further further comprises a liquid gas interface, described liquid gas interface is located in the container for evaporation, the thermal cycle solution that heat of evaporation is provided is via conduit and by-pass valve control thereof, flow into and the outflow liquid gas interface with same traffic, and the caloic that sees through liquid gas interface is conducted, make the de gassed solution evaporation in the container for evaporation, like this, this constant temperature distillation unit constitutes the constant temperature distillation unit of a vacuum distillation.
The objective of the invention is to solute concentrates.Do not expending the too much energy and using under the principle of lower temperature range, utilize the multilevel vacuum distilling device, implement liquid-discharge vacuumizing method with de-gas liq, make container for evaporation produce vacuum, because of the temperature of vacuum distillation and the scope of application increase of pressure, so the progression of vacuum distillation is increased, cooperate the constant temperature way of distillation, the transmission of solution, and the regeneration of thermal cycle solution, solution is separated and reclaim certain energy and do to use repeatedly, set the temperature of vacuum distillations at different levels according to the thermograde of thermal cycle solution, make the multilevel vacuum distilling that is separated into of de gassed solution, then the solution of unit energy separation is improved, and the concentrated solution of the low temperature of its discharge is made further solute with vacuum freeze-drying method and concentrated.
An of the present invention order is to reduce Cost of seawater desalination.Scope of application increase because of temperature and pressure, help to increase the progression of vacuum distillation, and then the quantum of output of increase water, on the other hand, because evaporation of water heat is about 7 times of heat of solidification, so the method for freezing consumes less energy and produces identical finished product water, the ice crystal of icing low temperature concentrated seawater that produces of multi-stage vacuum and thawing can effectively reduce the temperature of the thermal cycle solution of multilevel vacuum distilling afterbody discharge, the progression of vacuum distillation is increased, increase the quantum of output of water, at last, the thermal cycle solution of low temperature reclaims heat of evaporation according to the mode that progression successively decreases, make certain energy do to use repeatedly, the icing required low temperature seawater of multi-stage vacuum is the afterbody from the multi-stage vacuum cooling, and the icing ice crystal that produces of multi-stage vacuum is to be melted by the steam that multilevel vacuum distilling and multi-stage vacuum cooling produce, therefore in conjunction with multilevel vacuum distilling, the multi-stage vacuum cooling, and multi-stage vacuum freezes and can effectively reduce Cost of seawater desalination.
Another object of the present invention is at the soil cost that reduction is founded the factory.Multilevel vacuum distilling, the multi-stage vacuum cooling, and the icing de gassed solution of multi-stage vacuum, steam, the conduit of flowing through with condensation water, container for evaporation, condenser, and the container that freezes is to utilize liquid-discharge vacuumizing method to make it produce vacuum, liquid-discharge vacuumizing method is a vacuum principle of utilizing the pressure support liquid height that drags Li Qieli, therefore the container for evaporation or the icing container of the first order are folded on the second level, fold on the third level second level, be stacked into a tower shape mutually with this, to increase the difference in height of low level container and annex and container for evaporation or icing container, therefore reduce the land area of founding the factory and using, and reduce the required energy of generation vacuum.The multilevel vacuum distilling of tower shape, multi-stage vacuum cool off, reach the icing finished product water that makes thermal cycle solution, solution (seawater) and condense of multi-stage vacuum and all constantly flow, and can reduce the use amount of pump, and reduce fouling and corrosion.
Can reach the multilevel vacuum distilling, cooling of foregoing invention purpose, icing solution separates and the method and the equipment thereof of desalinization, by multilevel vacuum distilling device, multi-stage vacuum cooling device, and the multi-stage vacuum device that freezes formed, the invention provides a kind of multilevel vacuum distilling device of implementing the solution partition method of multilevel vacuum distilling, it comprises:
Pre-process equipment is the heater that de gassed solution and thermal cycle solution distinctly is heated to a design temperature; The constant temperature distillation unit of a plurality of vacuum distillations forms with the mutual storehouse of the mode of tower shape, and the first order is folded on the second level, and fold on the third level second level, with this mutual storehouse, becomes a tower shape, and the inflow of its correspondence and the conduit of outflow interconnect; Rearmounted treatment facility, comprise the vacuum tank that reclaims condensation water and concentrated solution, reduce the temperature of the thermal cycle solution that afterbody flows out heat exchanger, keep reclaiming the constant temperature distillation sheep unit of heat exchanger, a plurality of vacuum distillations of temperature of the vacuum tank of condensation water shared a low level container and annex thereof, so that produce vacuum, reach the circulating pump of thermal cycle solution.
The multilevel vacuum distilling device is being set under the original state, cooperate the constant temperature way of distillation, the transmission of solution, and the regeneration of thermal cycle solution, and solution is separated, set the temperature of vacuum distillations at different levels according to the thermograde of thermal cycle solution, make the multilevel vacuum distilling that is separated into of solution, after the temperature of the thermal cycle solution that reduces the afterbody outflow, the mode of successively decreasing again according to progression, continuously flow into and flow out condenser at different levels, to reclaim heat of evaporation, make its temperature successively decrease with progression and increase progressively, do to use to reclaim certain energy repeatedly, for the progression that makes vacuum distillation increases, and then the solution that unit energy is separated is improved, then increase the scope of application of the temperature of thermal cycle solution, the temperature of the thermal cycle solution of the afterbody of multilevel vacuum distilling outflow just is lower, then the progression of multilevel vacuum distilling the more, therefore the essential temperature that reduces the thermal cycle solution of afterbody outflow with the solution of low temperature more, just can make evaporation and the thermal cycle of condensing keep balance, therefore utilize icing the assisting of multi-stage vacuum cooling and multi-stage vacuum as multilevel vacuum distilling, when multi-stage vacuum cooling device and the multi-stage vacuum device that freezes is being set under the original state, cooperate the constant temperature way of distillation, the transmission of solution and the discharge opeing vacuum method of freezing, and solution is done icing the separation, the multi-stage vacuum cooling is vacuum evaporative cooling effect, the temperature of solution is reduced, with the cryogenic fluid that freezes as multi-stage vacuum, and the cost of saving precooling, the freeze heat of solidification of required melted ice crystal of multi-stage vacuum is the steam that produces from multilevel vacuum distilling and multi-stage vacuum cooling, or the heat energy of condenser discharge, and the ice crystal of low temperature concentrated solution that multi-stage vacuum freeze to produce and thawing can be used to reduce the temperature of the thermal cycle solution that the afterbody of multilevel vacuum distilling flows out, therefore the cooling of multilevel vacuum distilling and multi-stage vacuum can be combined into the method that a solution separates with multi-stage vacuum, with as desalinization and the concentrated method of solute.
Implement liquid-discharge vacuumizing method with de-gas liq, make de gassed solution, steam, reach the conduit that condensation water is flowed through, container for evaporation, container freezes, and condenser produces vacuum, its pressure for the saturation vapour pressure of the temperature of using this liquid and very small amount of air pressure with, the constant temperature way of distillation of utilizing boiling point of liquid to increase with pressure, the thermograde of gradable use thermal cycle solution, make it become multilevel vacuum distilling, its vapo(u)rizing temperature and pressure increase progressively with progression and successively decrease, therefore increase heat transfer area and condensation water, the thermal cycle solution of uniform temperature, according to the progression incremental manner, continuously flow into and flow out the liquid gas interface of container for evaporation at different levels, provide heat of evaporation to make the de gassed solution evaporation, after the temperature of the thermal cycle solution that reduces its afterbody discharge, according to the progression mode of successively decreasing, continuously flow into and flow out condenser at different levels, to reclaim heat of evaporation, and be liquid with devaporation, its temperature is successively decreased with progression and is increased progressively, make certain energy do to use repeatedly, flow at last in the heater of thermal cycle solution, be heated to the temperature of setting, finish cyclic program one time, because the temperature difference build-up of pressure of container for evaporation of each grade and condenser is poor, the steam that container for evaporation is produced flows toward condenser, continue to be lower than the temperature of container for evaporation when the temperature of condenser, what then condenser continued is liquid with devaporation, its condensation water and steam compile the lower temperature that flows into next stage, the condenser of low pressure continues to do cooling and condense, permanent set liquid is collected with the vacuum tank that keeps low temperature, so evaporation and the thermal cycle of condensing can be kept balance, de gassed solution is according to the progression incremental manner, continuously flow into and flow out container for evaporation at different levels, the concentrated solution that its afterbody is discharged can be utilized vacuum freeze-drying method to make further solute and concentrate.
The multi-stage vacuum cooling is the temperature that vacuum evaporative cooling principle reduces solution, with the cryogenic fluid that freezes as multi-stage vacuum, cooperate the constant temperature way of distillation, the de gassed solution of normal temperature is according to the progression incremental manner, continuously flow into and flow out container for evaporation at different levels, therefore its temperature increases progressively with progression and successively decreases, and the steam that the multi-stage vacuum cooling produces can be used to melt the ice crystal that multi-stage vacuum freezes and produces.Wherein, the liquid that de gassed solution can obtain after the degassing for general mixed solution such as lean solution, soup etc., or the liquid that after the degassing, obtains for seawater.
The icing required cryogenic fluid of multi-stage vacuum is to cool off from multi-stage vacuum, the transmission of conjugate solutions, the discharge opeing vacuum method of freezing, and the heat extraction of condenser, make the container that freezes produce ice crystal, and the concentrated solution of the icing low temperature of being discharged of multi-stage vacuum and the ice crystal of thawing, can be used to reduce the temperature of the thermal cycle solution that the afterbody of multilevel vacuum distilling flows out, and can be used to the stable temperature that reclaims the vacuum tank of condensation water, balance is kept in the thermal cycle that makes evaporation and condense, and the steam that multilevel vacuum distilling and multi-stage vacuum cooling are produced, can import in the icing container that multi-stage vacuum freezes with melted ice crystal, the concentrated solution and the melted ice crystal of its low temperature reclaim with vacuum tank.
In order to improve the output of the thermal efficiency and condensation water, the icing advantage that combines with multilevel vacuum distilling and multi-stage vacuum cooling of multi-stage vacuum is as follows:
1. because the icing low temperature concentrated solution that produces of multi-stage vacuum and the ice crystal of thawing, can be used to reduce the thermal cycle solution that the multilevel vacuum distilling afterbody flows out temperature, and keep reclaiming the temperature of the vacuum tank of condensation water, increase the scope of thermal cycle solution serviceability temperature, so improve the progression of multilevel vacuum distilling, and then improve the output of condensation water;
2. the de gassed solution of the icing required low temperature of multi-stage vacuum is the solution that flows out from multi-stage vacuum cooling afterbody, reduces the cost of precooling;
3. the multi-stage vacuum heat of solidification of required melted ice crystal of freezing is the steam that produces from multilevel vacuum distilling and multi-stage vacuum cooling;
4. multilevel vacuum distilling, multi-stage vacuum cooling, and multi-stage vacuum freeze and can share vacuum low level container and annex thereof;
Therefore the cooling of multilevel vacuum distilling and multi-stage vacuum can be combined into the method that a solution separates with multi-stage vacuum, with as desalinization and the concentrated method of solute.
The invention provides a kind of solution separation of implementing the multi-stage vacuum cooling, freezing and the multi-stage vacuum cooling device of sea water desalination method, described multi-stage vacuum cooling device is to form with the mutual storehouse of the mode of tower shape with the constant temperature of a plurality of vacuum cooled distillation unit, the first order is folded on the second level, fold on the third level second level, be stacked into a tower shape mutually with this, the inflow of its correspondence and the conduit of outflow interconnect, a low level container and annex thereof are shared in the constant temperature distillation unit of a plurality of vacuum cooled, to produce vacuum.
The present invention also provides the icing device of multi-stage vacuum of a kind of solution separation of implementing the multi-stage vacuum cooling, freezing and sea water desalination method, the icing device of described multi-stage vacuum is with the mutual storehouse of the mode of tower shape by a plurality of icing containers, the first order is folded on the second level, fold on the third level second level, is stacked into a tower shape mutually with this; The icing device of described multi-stage vacuum also comprises: transmission is arranged at a liquid-solid boundary in the container that freezes as caloic, with condenser the heat of solidification of solution and heat of evaporation discharge-a plurality of conduits and by-pass valve control thereof are connected with the multilevel vacuum distilling device with the multi-stage vacuum cooling device, the steam of generation is flowed in the icing container of each grade; Cooperate low level container and annex thereof, make de gassed solution, steam, reach conduit, the icing vacuum a plurality of conduits of container and by-pass valve control that condensation water is flowed through; Reclaim the ice crystal of thawing and the vacuum tank of low temperature concentrated solution.
Multilevel vacuum distilling provided by the present invention, cooling, icing solution separate and the method and the equipment thereof of desalinization, with other routine techniques mutually relatively the time, have following advantage:
One, the thermal source of heater used in the present invention can be the useless waste heat or the solar energy of low temperature;
Two, implement liquid-discharge vacuumizing method by de-gas liq, make container for evaporation produce vacuum, its pressure for the saturated vapour pressure that uses this liquid and very small amount of air pressure and, therefore can improve the progression of vacuum distillation;
Three, according to the vacuum principle of liquid-discharge vacuumizing method, therefore first order container for evaporation is folded on the container for evaporation of the second level, and fold on the third level second level, is stacked into a tower shape mutually with this, become the device of a multilevel vacuum distilling or multi-stage vacuum cooling, therefore reduce the area that uses the soil;
Four, a plurality of container for evaporation that are stacked into the tower shape make de gassed solution, thermal cycle solution and the distilled water that condenses all constantly flows, and operating temperature increases progressively according to progression and successively decrease, and can reduce the use amount of pump, and reduce fouling and corrosion;
Five, thermal cycle solution provides the heat of evaporation of de gassed solution and reclaims heat of evaporation, certain energy can be reused;
Six, the multi-stage vacuum cooling device provides the de gassed solution of the employed low temperature of discharge opeing vacuum-junction ice production apparatus, can save the cost of precooling;
Seven, the concentrated solution of the discharge opeing vacuum-junction ice production apparatus low temperature of being discharged and the ice crystal of thawing can reduce the temperature of the thermal cycle solution that the multilevel vacuum distilling afterbody flows out, and improve the progression of multilevel vacuum distilling.
Description of drawings
Consult the detailed description and the accompanying drawing thereof of the following relevant preferred embodiment of the present invention, can further understand technology contents of the present invention and purpose effect thereof; Relevant accompanying drawing is:
Fig. 1 is the schematic diagram that the constant temperature way of distillation is implemented in the constant temperature distillation unit of vacuum distillation of the present invention;
Fig. 2 is that multilevel vacuum distilling device of the present invention is implemented the solution separation of multilevel vacuum distilling and the configuration schematic diagram of sea water desalination method;
Fig. 3 is that the icing device of multi-stage vacuum cooling device of the present invention and multi-stage vacuum is implemented the multi-stage vacuum cooling, icing solution separates and the configuration schematic diagram of sea water desalination method.
The specific embodiment
See also Fig. 1, Fig. 1 is the schematic diagram that the constant temperature way of distillation is implemented in the unit, constant temperature teahouse of vacuum distillation of the present invention, the constant temperature way of distillation is to utilize boiling point of liquid to increase with pressure, and the temperature difference of vacuum causes the principle of the pressure differential of saturated vapor, utilize the constant temperature distillation unit of vacuum distillation, make de gassed solution in the container for evaporation of vacuum, constantly boiling evaporation under a temperature of setting and do not change the pressure of container for evaporation makes evaporation and the method for balance is kept in the thermal cycle of condensing.Wherein, de gassed solution can hold the liquid that liquid, soup etc. obtain as useless for general mixed solution after the degassing, or is the liquid that seawater obtains after the degassing.
As shown in Figure 1, the constant temperature distillation unit of vacuum distillation is by a container for evaporation 21, a flow control valve 22, a condenser 4, a liquid gas interface 211, the conduit a that condenses, and a plurality of conduit b, c, e, f, g, h, i, j, k, l and by- pass valve control 23,24,25,26,27,28,29,30 combine, container for evaporation 21 is connected with condenser 4 with the conduit a that condenses, the steam of its generation is imported in the condenser 4, flow control valve 22 is located at the appropriate location of condensing conduit a, when container for evaporation 21 is depressed at the saturated vapor of the temperature of the vacuum distillation of this setting, the steam that control container for evaporation 21 produces, enter in the condenser 4 via the conduit a that condenses, and keep pressure in the container for evaporation 21; Condenser 4, flows into and outflow condenser 4 with same traffic through conduit g, h to reclaim the thermal cycle solution of heat of evaporation, absorb the heat of evaporation of the steam of container for evaporation 21 generations, improving its temperature, and condensed vapor is condensation water, and permanent set liquid enters in the vacuum tank 8 and reclaims; De gassed solution with uniform temperature, via conduit i, j and by-pass valve control 23 thereof, 24, each flows into certain flow and outflow container for evaporation 21, liquid gas interface 211 is located in the container for evaporation 21, the thermal cycle solution that heat of evaporation is provided is via conduit b, c, flow into and outflow liquid gas interface 211 with same traffic, and the caloic that sees through liquid gas interface 211 is conducted, make the de gassed solution evaporation in the container for evaporation 21, provide the temperature of the thermal cycle solution of heat of evaporation to be higher than the temperature of the thermal cycle solution that reclaims heat of evaporation, therefore the operating temperature of container for evaporation 21 is higher than the operating temperature of condenser 4, its temperature difference causes the pressure differential of saturated vapor, the steam that orders about container for evaporation 21 generations flows toward condenser 4, balance is kept in the thermal cycle that makes evaporation and condense, the constant temperature distillation unit of the vacuum distillation of conduit i and by-pass valve control 23 connection upper levels thereof or the heater of de gassed solution, conduit j and by-pass valve control 24 thereof connect the constant temperature distillation unit or the vacuum tank 9 of the vacuum distillation of next stage, its function is as conduit i and by-pass valve control 23 thereof, make de gassed solution flow into the constant temperature distillation unit of the vacuum distillation of next stage, conduit e and control gate 25 thereof connect the constant temperature distillation unit of the vacuum steaming anchor of upper level, if do not have the constant temperature distillation unit of the vacuum distillation of upper level, then when implementing liquid-discharge vacuumizing method, use as exhaust, conduit f and by-pass valve control 26 thereof connect the constant temperature distillation unit or the vacuum tank 8 of the vacuum distillation of next stage, its function is as conduit e and by-pass valve control 25 thereof, make steam and condensation water flow into the constant temperature distillation unit of next stage vacuum distillation, conduit b, the constant temperature distillation unit of the vacuum distillation of h connection upper level or the heater of thermal cycle solution, conduit c, the constant temperature distillation unit of the vacuum distillation of g connection next stage or heat exchanger are to reduce its temperature, by-pass valve control 27, when the 30 constant temperature distillation unit for the vacuum distillation that prevents other grade produce vacuum, after causing de-gas liq to produce vacuum, closed control valve doorway 27,30 make it airtight.
As shown in Figure 1, the original state of the constant temperature distillation unit of vacuum distillation is to implement liquid-discharge vacuumizing method with de-gas liq (to please refer to No. the 02106683.3rd, China, the patent that is entitled as " having vacuum drying method of multipurpose closed type cleaning and device thereof " is applied for deeply), make de gassed solution, steam, the conduit a that flows through with condensation water, e, f, i, j, container for evaporation 21, condenser 4 produces vacuum, low level container 3 and annex thereof are with conduit k, l and by-pass valve control 27 thereof, 28,29,30 each and conduit j, f links to each other, under suitable difference in height, implement liquid-discharge vacuumizing method and produce vacuum, when by- pass valve control 24,26 close after, de-gas liq is filled with container for evaporation 21, condenser 4, and conduit a, e, f, i, j, k, l, closing control valve 23,25, adjust the pressure in the low level container 3, come into effect liquid-discharge vacuumizing method, at last, flow control valve 22 cuts out, by- pass valve control 27,30 close, and the injection de gassed solution reaches suitable height in the container for evaporation 21 of vacuum, and the temperature of the vacuum distillation of setting container for evaporation 21, its temperature is lower than de gassed solution and thermal cycle solution flows into the temperature of evaporating appearance 2521 and liquid gas interface 211, if de gassed solution is identical solution with de-gas liq, when then implementing liquid-discharge vacuumizing method, the part volume generation vacuum of container for evaporation 21 is got final product.
The constant temperature way of distillation is under the condition of suitable liquid gas interface 211, its evaporation capacity is according to the flow of de gassed solution and thermal cycle solution, and inflow is decided with the temperature difference that flows out, as shown in the figure, when de gassed solution and the lasting inflow of thermal cycle solution and outflow container for evaporation 21 and liquid gas interface 211 thereof, container for evaporation 21 continues to produce steam, and when reaching the saturated vapour pressure of temperature of vacuum distillation of this setting, beating up-flow adjustable valve 22 enters in the condenser 4 steam of container for evaporation 21 generations, what continue when condenser 4 is liquid with devaporation, flow control valve 22 must be kept the stable of container for evaporation 21 internal pressures, the temperature that flows out according to de gassed solution or thermal cycle solution is adjusted flow control valve 22 simultaneously, be lower than the temperature of vacuum distillation when the temperature that flows out, adjust Flow-rate adjustment and read 22, reduce the discharge rate of steam, when the temperature that flows out is higher than the temperature of vacuum distillation, adjust flow control valve 22, increase the discharge of steam.
If liquid gas interface 211 and conduit b, the c of the thermal cycle solution that heat of evaporation is provided are removed in the constant temperature of vacuum distillation distillation unit, then become the constant temperature distillation unit of vacuum cooled; As thermal source, when de gassed solution evaporated, the temperature of de gassed solution reduced its de gassed solution, formed the vacuum cooled effect with self temperature, and the original state of the constant temperature distillation unit of vacuum cooled is as the original state of the constant temperature distillation unit of vacuum distillation.
In the process of vacuum distillation or vacuum cooled, the air that remains in de gassed solution can continue to be accumulated in conduit a, e that de gassed solution, steam and condensation water flow through, f, i, j, container for evaporation 21, the condenser 4, if during the temperature of the vacuum distillation of its pressure influence de gassed solution, should implement the original state of the constant temperature distillation unit of vacuum distillation or vacuum cooled once more with de gassed solution, make it recover vacuum, so the solution more completely that outgases, can reduce the number of times of implementing original state.
See also Fig. 2, Fig. 2 is that multilevel vacuum distilling device of the present invention is implemented the solution separation of multilevel vacuum distilling and the configuration schematic diagram of sea water desalination method, and as shown in Figure 2, multilevel vacuum distilling device 1 of the present invention comprises:
One pre-process equipment, be the solution that will remove the impurity and the degassing, and thermal cycle solution be heated to the heater 12,13 of a design temperature respectively;
The constant temperature distillation unit 2 of a plurality of vacuum distillations, the constant temperature distillation unit 2 of described a plurality of vacuum distillations is stacked into a multilevel vacuum distilling device 1 mutually in the mode of tower shape, the first order is folded on the second level, fold on the third level second level, be stacked into a tower shape mutually with this, the conduit c of the inflow of its correspondence and outflow interconnects, and a low level container 3 and annex thereof are shared in the constant temperature distillation unit 2 of a plurality of vacuum distillations, to produce vacuum;
One rearmounted treatment facility, comprise the vacuum tank 8,9 that reclaims condensation water and concentrated solution, reduce the temperature of the thermal cycle solution that afterbody discharges heat exchanger 51, keep reclaiming a low level container 3 and an annex thereof of being shared the constant temperature distillation unit 2 of heat exchanger 52, a plurality of vacuum distillations of temperature of the vacuum tank 8 of condensation water, the circulating pump 53 that reaches thermal cycle solution.
As shown in Figure 2, the original state of multilevel vacuum distilling device 1 is the mode of successively decreasing according to progression, implement the original state of the constant temperature distillation unit 2 of vacuum distillation step by step, the liquid gas profile of equilibrium according to the tax gasoloid, set the thermograde of thermal cycle solution,, set the temperature of each grade vacuum distillation again according to the thermograde of thermal cycle solution, its temperature increases progressively with progression and successively decreases, so the saturated vapour pressure of the temperature of vacuum distillation is passed and will be successively decreased with progression.Wherein, the liquid that de gassed solution can obtain after the degassing for general mixed solution such as lean solution, soup etc., or the liquid that after the degassing, obtains for seawater.
As shown in Figure 2, the transmission of its solution is to be heated to the de gassed solution of design temperature, the mode that increases progressively according to progression, each is with certain flow, continuously flow into and flow out container for evaporation at different levels 21, evaporation along with de gassed solution, its concentration increases progressively with progression and increases, or separate out crystallization, the concentrated solution that afterbody is discharged, reclaim with vacuum tank 9, its concentrated solution can be utilized vacuum freeze-drying method to make further solute and concentrate, when if container for evaporation 21 has crystallization to separate out, then before the container for evaporation 21 that flows into next stage, leach crystal earlier, its crystal reclaims with vacuum tank, and the residual air that is dissolved in de gassed solution can continue to be accumulated in the constant temperature distillation unit 2 of vacuum distillation, and when influencing the temperature of vacuum distillation of de gassed solution, especially first, the constant temperature distillation unit 2 of the vacuum distillation of secondary, should implement the original state of the constant temperature distillation unit 2 of vacuum distillation once more with de gassed solution, make it recover vacuum, therefore near the solution that outgases fully, can reduce the constant temperature of implementing vacuum distillation steam pin unit 2 from original state, make it recover vacuum, therefore near the solution that outgases fully, the constant temperature that can reduce the vacuum distillation of enforcement steams the number of times of the original state of pin unit 2.
As shown in Figure 2, the regeneration of thermal cycle solution is to be heated to the thermal cycle solution of design temperature ' mode that increases progressively according to progression, with same traffic, continuously flow into and flow out liquid gas interface 2l1 at different levels, the heat of evaporation of de gassed solution is provided, its temperature increases progressively with progression and successively decreases, the thermal cycle solution that afterbody is discharged reduces its temperature with heat exchanger 51, again with circulating pump 53 actings, the mode of successively decreasing according to progression, it is continuously flowed into and flowing out condenser at different levels 4, absorbing heat of evaporation, and is condensation water with devaporation, its temperature is successively decreased with progression and is increased progressively, and passes back at last in the heater 13 of thermal cycle solution; In order to reclaim certain energy, do to use repeatedly, so the endless form of thermal cycle solution is: A. is heated to a design temperature; B., heat of evaporation is provided, and its temperature increases progressively according to progression and successively decreases; C. reduce temperature; D. reclaim heat of evaporation, its temperature is successively decreased according to progression and is increased progressively; If the temperature that afterbody flows out is lower than normal temperature, multilevel vacuum distilling can cool off with multi-stage vacuum, combine, and thermal cycle solution reduces its temperature with the concentrated solution of the low temperature of multi-stage vacuum cooling, the generation of freezing and the ice crystal of thawing; If the temperature that afterbody flows out is higher than normal temperature, then reduce the temperature of thermal cycle solution with normal temperature liquid.
Provide the thermograde of the thermal cycle solution of heat of evaporation to set according to the liquid gas profile of equilibrium of de gassed solution, set the temperature that each grade vacuum distillation is used according to this, because of the temperature range of using not overlapping, the formed temperature curve of each grade vacuum distillation is the ladder type curve so thermal cycle solution is flowed through, the thermograde of Here it is thermal cycle solution.
See also Fig. 3, Fig. 3 is that the icing device of multi-stage vacuum cooling device of the present invention and multi-stage vacuum is implemented, the multi-stage vacuum cooling, the solution separation of freezing and the configuration schematic diagram of sea water desalination method, described multi-stage vacuum cooling, the solution partition method of freezing, be to utilize the method for freezing and melting, produce condensation water, and can be used to auxiliary multilevel vacuum distilling, make it increase the scope of application of the temperature of thermal cycle solution, and then increase progression, and the output and the thermal efficiency of increase condensation water, make whole condensation water output more simultaneously, the cryogenic fluid that the afterbody of multi-stage vacuum cooling device flows out imports in the icing device of elementary multi-stage vacuum, can save the energy of precooling, the transmission of conjugate solutions, the constant temperature way of distillation, the discharge opeing vacuum method of freezing makes de gassed solution produce ice crystal, the progression that the concentration of its de gassed solution is frozen with vacuum increases progressively and increases progressively, so its temperature increases progressively with progression and successively decreases.Wherein, the liquid that de gassed solution can obtain after the degassing for general mixed solution such as lean solution, soup etc., or the liquid that after the degassing, obtains for seawater.
As shown in Figure 3, multi-stage vacuum cooling device 6, be to form a multistage vacuum cooling unit 6 with the mutual storehouse of the mode of tower shape by the constant temperature of a plurality of vacuum cooled distillation unit 61, the inflow of its correspondence and the conduit of outflow interconnect, do the evaporative cooling of vacuum with the temperature of de gassed solution self, the mode that the de gassed solution of normal temperature increases progressively according to progression, continuously flow into and flow out container for evaporation 611 at different levels, cooperate the constant temperature way of distillation, the temperature of de gassed solution increases progressively with progression and successively decreases, but its concentration does not significantly change, the temperature of the de gassed solution that afterbody flows out is near the temperature of freezing, a low level container 3a and annex thereof are shared in the constant temperature distillation unit 61 of a plurality of vacuum cooled, after icing container 71 produces ice crystal, its temperature is lower than the temperature of container for evaporation 611, so the steam that container for evaporation 611 produces can import in the container 71 that freezes smoothly, and melted ice crystal.
As shown in Figure 3, the multi-stage vacuum device 7 that freezes, be to form with the mutual storehouse of the mode of tower shape by a plurality of icing containers 71, establish a liquid-solid boundary 711 in the icing container 71, utilize condenser 72 to see through the caloic transmission of liquid-solid boundary 711, the heat of solidification of de gassed solution is discharged, utilizing conduit 5 and multi-stage vacuum to steam the scholar device is connected, the steam that the cooling of multilevel vacuum distilling and multi-stage vacuum is produced flows into respectively in the icing container 71 of each grade, share a low level with multi-stage vacuum cooling device 6 and hold different 3a and annex thereof, make de gassed solution, steam, and the conduit and the container 71 that freezes that condensation water flows produce vacuum, the ice crystal of the thawing that the discharge opeing vacuum method of freezing produces and the concentrated solution of low temperature are with vacuum tank 10,11 reclaim, and can be used to reduce the temperature of the thermal cycle solution that the multilevel vacuum distilling afterbody discharges, and keep its reclaim condensation water temperature.
As shown in Figure 3, the original state of the icing device 7 of multi-stage vacuum is the modes of successively decreasing according to progression, implement liquid-discharge vacuumizing method with de-gas liq step by step, make de gassed solution, steam, reach the conduit that condensation water is flowed through, and the container 71 that freezes produces vacuum, and avoid de-gas liq to reflux, the original state of multi-stage vacuum cooling device 6 is the modes of successively decreasing according to progression, implement the original state of the constant temperature distillation unit 61 of vacuum cooled step by step, set the vapo(u)rizing temperature of each grade vacuum cooled then, its temperature increases progressively with progression and successively decreases, so the distillation pressure of vacuum cooled increases progressively with progression and successively decreases.
The discharge opeing vacuum method of freezing is that the icing mode with the falling liquid film of condenser 72 heat extractions and discharge opeing vacuum makes de gassed solution form in liquid-solid boundary 711 to form ice crystal uniformly, as shown in Figure 3, it is the icing container 71 that the de gassed solution of the low temperature that flows out with multi-stage vacuum cooling afterbody is filled with the vacuum of the first order, provide liquid-solid boundary 711 to form in the icing container 71 for ice crystal, utilize the caloic transmission of condenser 72 and liquid-solid boundary 711, heat of solidification in the container 71 that freezes and heat of evaporation are discharged, and gradually de gassed solution is discharged with liquid-discharge vacuumizing method, its de gassed solution flows into the second level, the second level flows into the third level, then the de gassed solution of afterbody flows into vacuum tank 11, the liquid level of icing container 71 reduces gradually with the discharge of de gassed solution, therefore the vacuum volume of its generation increases gradually, because the heat extraction of condenser 72, make the de gassed solution of liquid phase form composition ice crystal uniformly in liquid-solid boundary 711 as the falling liquid film mode of freezing, the container 71 interior vacuum volumes that freeze simultaneously increase gradually, because the heat extraction that condenser 72 continues, make the pressure ratio equilibrium vapor pressure ratio equilibrium vapour pressure of volume of vacuum low, then the de gassed solution surface can rise the beginning evaporation, because the result of evaporation heat absorption can cause remaining mother liquor to turn cold, will reduce temperature because of transpiration-cooled effect, its steam (equilibrium vapor pressure) is adsorbed by the surface of liquid-solid boundary 711, condenser 72 is taken away the heat of steam, make steam transfer the ice crystal of solid phase to, impel de gassed solution to continue evaporation, to keep the balance of its vapour pressure, and produce more Ice, after the mother liquor that thickens gradually is discharged from lentamente, the volume of vacuum increases gradually, impelling more, the steam of multimass produces, quicken the generation of ice crystal, more and more dense mother liquor is discharged, and has only ice crystal at last in icing container 71.
As shown in Figure 3, the mode that the transmission of solution increases progressively according to progression, each icing container 71 of flowing through, when the container 71 that freezes will not condense after the de gassed solution of ice crystal enters the icing container 71 of time one-level fully, the icing container 71 of inferior one-level just rises the icing method of beginning enforcement discharge opeing vacuum, and the steam that multilevel vacuum distilling and multi-stage vacuum cooling produce just rises in the icing container 71 of beginning importing, ice crystal is melted, permanent set liquid reclaims with vacuum tank 10, therefore the ice crystal that freezes of multi-stage vacuum to condense with melting be discontinuous, when container 71 has crystallization to separate out if freeze, then de gassed solution is before the icing container 71 that flows into next stage, leach crystal earlier, its crystal is dissolved in de gassed solution with the vacuum tank recovery residual air can continue to be accumulated in the constant temperature distillation unit of vacuum cooled, and when influencing the temperature of vacuum distillation of de gassed solution, especially first, the constant temperature distillation unit of the vacuum cooled of secondary, the original state of should be once more implementing the constant temperature distillation unit 61 of vacuum cooled with de gassed solution makes it recover vacuum, therefore near the solution that outgases fully, can reduce the number of times of the original state of the constant temperature distillation unit of implementing vacuum cooled.
Claims (7)
1. one kind is utilized the constant temperature distilling apparatus to carry out that solution separates and the method for desalinization, and this method comprises:
A plurality of constant temperature distillations unit is become the multilevel vacuum distilling device with the mutual storehouse of the mode of tower shape;
Set the multilevel vacuum distilling device for original state;
Cooperate transmission, and the regeneration of thermal cycle solution of the constant temperature way of distillation, solution, solution is separated and reclaim certain energy and do to use repeatedly;
Set the temperature of vacuum distillations at different levels according to the thermograde of thermal cycle solution, make the multilevel vacuum distilling that is separated into of solution;
Wherein, the temperature of vacuum distillation and pressure increase progressively with progression and successively decrease, and because of the temperature of vacuum distillation and the scope of application of pressure increase, so progression is increased, then the solution that separates of unit energy is improved.
2. the method for solution separation as claimed in claim 1 and desalinization, the original state of wherein said multilevel vacuum distilling device, be the mode of successively decreasing according to progression, implement the original state of the constant temperature distillation unit of vacuum distillation step by step, thermograde according to thermal cycle solution, set the temperature of the vacuum distillation of each grade, its temperature increases progressively with progression and successively decreases, so the saturated vapor pressure of the temperature of vacuum distillation increases progressively with progression and successively decreases.
3. the method for solution separation as claimed in claim 1 and desalinization, wherein the transmission of solution is to be heated to the de gassed solution of proper temperature, according to the progression incremental manner, each is with certain flow, continuously flow into and flow out container for evaporation at different levels, evaporation along with de gassed solution, its concentration increases progressively with progression and increases, or separates out crystallization, and what afterbody was discharged is concentrated solution, reclaim with vacuum tank, its concentrated solution can be utilized vacuum freeze-drying method to make further solute and concentrate, and when having crystallization to separate out as if container for evaporation, then de gassed solution is before the container for evaporation that flows into next stage, leach crystal earlier, its crystal reclaims with vacuum tank.
4. the method for solution separation as claimed in claim 1 and desalinization, wherein the regeneration of thermal cycle solution is to be heated to the thermal cycle solution of design temperature, according to the progression incremental manner, with same traffic, continuously flow into and flow out liquid gas interface at different levels, the heat of evaporation of de gassed solution is provided, and its temperature increases progressively with progression and successively decreases, the thermal cycle solution that afterbody is discharged, reduce its temperature with heat exchanger, again with circulating pump acting,, continuously flow into and flow out condenser at different levels according to the mode that progression successively decreases, to absorb heat of evaporation, and steam is condensed into condensation water, its temperature is successively decreased with progression and is increased progressively, and passes back at last in the heater of thermal cycle solution.
5. the method for solution separation as claimed in claim 1 and desalinization, wherein the thermograde of thermal cycle solution is set according to the liquid gas profile of equilibrium of de gassed solution, set the temperature that each grade vacuum distillation is used according to the thermograde of thermal cycle solution again, because of the temperature range of using not overlapping, the formed temperature curve of each grade vacuum distillation is the ladder type curve so thermal cycle solution is flowed through, and is the thermograde of thermal cycle solution.
6. as the method for each described solution separation and desalinization in the claim 1 to 5, wherein said de gassed solution is general mixed solution.
7. the method for solution separation as claimed in claim 6 and desalinization, wherein said mixed solution is the liquid that lean solution, soup etc. obtain after the degassing, or is the liquid that seawater obtains after the degassing.
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| CNB021567174A CN1297491C (en) | 2002-12-12 | 2002-12-12 | Method and apparatus for separating solution and desalting sea water |
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| CNA2006100018481A Pending CN1935676A (en) | 2002-12-12 | 2002-12-12 | Solution separating and sea water desalting method and its equipment |
| CNB021567174A Expired - Fee Related CN1297491C (en) | 2002-12-12 | 2002-12-12 | Method and apparatus for separating solution and desalting sea water |
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| CNA2006100018481A Pending CN1935676A (en) | 2002-12-12 | 2002-12-12 | Solution separating and sea water desalting method and its equipment |
| CNB021567174A Expired - Fee Related CN1297491C (en) | 2002-12-12 | 2002-12-12 | Method and apparatus for separating solution and desalting sea water |
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| CN1778693B (en) * | 2005-01-27 | 2012-05-02 | 蔡梅初 | Through-flow vacuum seawater desalination plant and method thereof |
| CN101671058B (en) * | 2009-10-06 | 2011-01-26 | 冯静 | Semi-automatic production method and equipment for preparing ice and desalinating seawater by natural energy resources |
| CN101671059B (en) * | 2009-10-06 | 2011-03-30 | 冯静 | Method and device structure for preparing ice and desalinating seawater by vehicles and natural energy resources |
| MY168219A (en) * | 2010-02-23 | 2018-10-15 | Aquamill Five Star Pty Ltd | A device for heating a liquid comprising a solvent and solute, and separating the solvent and solution |
| CN109489133A (en) * | 2018-09-29 | 2019-03-19 | 东南大学 | A kind of solar energy solution regeneration system based on passive vacuum |
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| US4880504A (en) * | 1987-02-24 | 1989-11-14 | Cellini John V | Vacumm distillation system with spiralled cold coil |
| WO1995006504A1 (en) * | 1993-08-30 | 1995-03-09 | Kabushiki Kaisha Toshiba | Method of and apparatus for distillation under reduced pressure |
| US5853549A (en) * | 1995-03-14 | 1998-12-29 | Sephton; Hugo H. | Desalination of seawater by evaporation in a multi-stack array of vertical tube bundles, with waste heat. |
| CN1205647A (en) * | 1996-09-20 | 1999-01-20 | 美国技术集团有限公司 | Small compact vacuum distillation appts. |
| EP1049650A1 (en) * | 1997-12-25 | 2000-11-08 | Ebara Corporation | Desalination method and desalination apparatus |
| CN2399372Y (en) * | 1999-09-20 | 2000-10-04 | 丁成玉 | Low pressure distillation and evaporation seawater desalting appts. |
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| CN1297491C (en) | 2007-01-31 |
| CN100371044C (en) | 2008-02-27 |
| CN1506314A (en) | 2004-06-23 |
| CN1935676A (en) | 2007-03-28 |
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