CN106693414A - Heat-mass co-transfer evaporation and crystallization system and working method thereof - Google Patents
Heat-mass co-transfer evaporation and crystallization system and working method thereof Download PDFInfo
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- CN106693414A CN106693414A CN201710009546.7A CN201710009546A CN106693414A CN 106693414 A CN106693414 A CN 106693414A CN 201710009546 A CN201710009546 A CN 201710009546A CN 106693414 A CN106693414 A CN 106693414A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/14—Evaporating with heated gases or vapours or liquids in contact with the liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0018—Evaporation of components of the mixture to be separated
- B01D9/0031—Evaporation of components of the mixture to be separated by heating
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a heat-mass co-transfer evaporation and crystallization system and a working method thereof, and belongs to the field of solution evaporation and crystallization. The heat-mass co-transfer evaporation and crystallization system mainly comprises an air blower, a draught fan, a heat-mass transfer tank, a heater, a crystallization tank, a maturing tank, a compressor, an expansion valve, and the like. The heat-mass co-transfer evaporation and crystallization system is characterized in that air and a solution are in direct contact to transfer heat and mass in the heat-mass transfer tank, and thus the solution is evaporated and crystallized; due to additional arrangement of the maturing tank in the system, the solution can be further crystallized; a low-melting point working medium is evaporated after absorbing heat in the maturing tank, is subjected to compression heating by using the compressor, and is further added into the heater to heat the solution to be evaporated, so that internal energy transfer of the system is achieved. The heat-mass co-transfer evaporation and crystallization system adopts a heat-mass co-transfer method, evaporation and crystallization of the solution can be achieved at normal temperature, the heating temperature is low, the noble metal consumption amount is small, and a remarkable energy conservation effect can be achieved. The system is applicable to evaporation and crystallization processes of solutions of which the solubility is improved along with increase of temperature.
Description
Technical field
The present invention devises a kind of caloic simultaneous interpretation evaporation and crystallization system and its method of work, belongs to solution evaporative crystallization neck
Domain.
Background technology
Evaporative crystallization is to be concentrated by evaporation solution to reach supersaturation, so as to separate out the process of crystal.It is industrial at present conventional
Evaporative crystallization technique mainly have multiple-effect evaporation crystallize and function of mechanical steam recompression（Mechanical Vapor
Recompression,MVR）Evaporative crystallization technique.Both technologies belong to boiling type evaporation technique, it is necessary to by material solution
Fluidized state is heated to, the quantity of solvent vaporized during due to evaporation is larger, and evaporation process needs to consume substantial amounts of heating steam, energy
Consumption is big.Additionally, explosive evaporation technology uses partition-wall heat transfer formula evaporator, it is necessary to consume the precious metal of a large amount of good effect of heat exchange
Material, the cost of manufacture of evaporator is higher.
The energy ezpenditure of evaporation and crystal process how is reduced, the manufacturing cost of equipment is reduced, is urgently to be resolved hurrily at present asking
Topic.
The content of the invention
The present invention is directed to the big shortcoming of existing explosive evaporation technology heating-up temperature high, high energy consumption, precious metal consumption, carries
Go out the caloic simultaneous interpretation evaporation and crystallization system that a kind of heating-up temperature is low, energy consumption is low, precious metal consumption is few.
A kind of caloic simultaneous interpretation evaporation and crystallization system, it is characterised in that：The system includes clear Recycling Mother Solution pump, heater, biography
Hot mass transfer tank, crystallizing tank, maturator, magma pump, densitometer, magma circulating pump, magma tank, centrifuge, crystal tank, mother liquor pump,
Compressor, expansion valve；Wherein heat and mass tank includes being disposed thereon the gas distribution of the spray equipment in portion, the filler at middle part and bottom
Device；Heat and mass tank includes upper air outlet, top solution inlet, lower air inlet and bottom taphole；Crystallization
Tank includes the outlet of solution inlet, the clear mother liquor outlet in top and bottom concentrated solution；Maturator includes that concentrated solution entrance, top magma enter
Mouth, the outlet of bottom magma, cold side input port and cold side outlet port；Densitometer includes magma entrance, the outlet of qualified magma and unqualified crystalline substance
Slurry outlet；Centrifuge includes magma entrance, crystal outlet and mother liquor outlet；Heater includes hot side entrance, hot side outlet, cold side
Entrance and cold side outlet port；Material inlet is connected with heater cold side input port, heater cold side outlet port and heat and mass tank top
Solution inlet is connected, and heat and mass tank bottom taphole is connected with crystallizing tank solution inlet, the clear mother liquor outlet in crystallizing tank top
It is connected with heater cold side input port by clear Recycling Mother Solution pump, crystallizing tank bottom concentrated solution is exported and maturator concentrated solution entrance phase
Even, maturator bottom magma is exported by being connected with densitometer magma entrance after magma pump, and the unqualified magma outlet of densitometer is logical
Cross magma circulating pump to be connected with maturator top magma entrance, the qualified magma outlet of densitometer is connected with magma tank entrance, magma
Tank outlet is connected with centrifuge magma entrance, and the outlet of centrifuge crystal is connected with crystal tank, and centrifuge mother liquor outlet passes through mother liquor
Pump is connected with heater cold side input port；Maturator cold side outlet port is connected by compressor with heater hot side entrance, heater heat
Side outlet is connected by expansion valve with maturator cold side input port.
The method of work of described caloic simultaneous interpretation evaporation and crystallization system, it is characterised in that including the following course of work：Air
Flowed into from the lower air inlet of heat and mass tank, after there is heat and mass with the low concentration solution for spraying from top to bottom, from biography
The upper air outlet of hot mass transfer tank enters environment；Material flows into system from material inlet, clear with clear Recycling Mother Solution pump discharge
Low concentration solution is formed after the mother liquor mixing of mother liquor and mother liquor pump discharge, low concentration solution flows into the cold side of heater, absorbs it
After hot side low boiling working fluid liberated heat, flowed into from heat and mass tank top solution inlet, and in the effect change of spray equipment
Into fine drop, then there is heat and mass with the air for flowing from bottom to top in filler, moisture reduce after temperature reduction from
The taphole outflow of heat and mass tank bottom, stands into crystallizing tank：The clear mother liquor on crystallizing tank top is by clear Recycling Mother Solution
Pump flows into heater cold side；The concentrated solution of crystallizing tank bottom flows into maturator, is separated out to after the low boiling working fluid heat release of its cold side
Crystal, forms magma, and magma flows to densitometer by magma pump：When magma density is ineligible, magma is followed by magma
Ring pump again flows into maturator；When magma density is eligible, magma flows into magma tank, and the magma in magma tank flows into centrifugation
Machine carries out separation of solid and liquid：The crystal that centrifuge is isolated is stored in crystal tank；The mother liquor that centrifuge is isolated passes through mother liquor pump
Flow into the cold side of heater, so circulation；Low temperature low boiling working fluid is flowed into from maturator cold side input port, is absorbed wherein solution and is released
Heat after become Low Temperature Steam, after Low Temperature Steam is through compressor increasing temperature and pressure, from heater hot side entrance flow into, to its cold side
Low concentration solution goes out heat, then expanded valve expansion, and decrease temperature and pressure becomes initial cryogenic state, so circulates work.
Described caloic simultaneous interpretation evaporation and crystallization system, it is characterised in that：System also includes and heat and mass tank lower air
The connected air blower of entrance, or/and the air-introduced machine being connected with heat and mass tank upper air outlet.Above-mentioned caloic simultaneous interpretation evaporation knot
The method of work of crystallographic system system, it is characterised in that including the following course of work：Air blower and air-introduced machine, air can be set simultaneously
Under the double action of air blower blowing force and air-introduced machine suction, heat and mass tank is flowed through；Can also a setting air blower, without setting
Air-introduced machine is put, air flows through heat and mass tank under the blowing force of air blower；Can also a setting air-introduced machine, and be not provided with air blast
Machine, air flows through heat and mass tank under the suction of air-introduced machine.
Described caloic simultaneous interpretation evaporation and crystallization system, it is characterised in that：Agitator is set in maturator.Mixing speed is controlled
In rational scope, prevent crystal from settling and broken.For being easy to the lolute crystallization process of crystallization, maturator can also
It is not provided with agitator.
The present invention realizes the evaporative crystallization of dissolved liquid, it is not necessary to be heated to solution using the method for caloic simultaneous interpretation
Fluidized state, energy consumption is low, and precious metal consumption is small；System sets up maturator, promotes solution further to tie by the type of cooling
It is brilliant；Low boiling working fluid evaporates after absorbing the heat in maturator, after being heated up through compressor compression, is heated into heater to be evaporated
Solution, realizes the transfer of internal system energy.System has the advantages that consuming little energy, cheap for manufacturing cost, it is adaptable to molten
Xie Du increases and the evaporation and crystal process of increased solution with temperature.
Brief description of the drawings
Fig. 1 caloic simultaneous interpretation evaporation and crystallization system figures；
Label title in figure：The clear Recycling Mother Solution pumps of 1-；2- heaters；3- spray equipments；4- fillers；5- heat and mass tanks；6- cloth
Device of air；7- air-introduced machines；8- air blowers；9- crystallizing tanks；10- maturators；11- magma pumps；12- densitometers；13- magmas are circulated
Pump；14- magma tanks；15- centrifuges；16- crystal tanks；17- mother liquor pumps；18- compressors；19- expansion valves；20- agitators；21-
Material inlet.
Specific implementation method
Fig. 1 is caloic simultaneous interpretation evaporation and crystallization system proposed by the present invention, and the course of work of system is illustrated referring to Fig. 1.
Air is flowed into by air blower 8 from the lower air inlet of heat and mass tank 5, with the low concentration for spraying from top to bottom
After solution occurs heat and mass, environment is entered by air-introduced machine 7 from the upper air outlet of heat and mass tank 5；
Initial soln flows into system from material inlet 21, what the clear mother liquor and mother liquor pump 17 exported with clear Recycling Mother Solution pump 1 were exported
Low concentration solution is formed after mother liquor mixing, low concentration solution flows into the cold side of heater 2, absorb the releasing of its hot side low boiling working fluid
Heat after, flowed into from the top of heat and mass tank 5, and effect in spray equipment 3 becomes fine drop, then in filler 4
There is heat and mass with the air for flowing from bottom to top, moisture is reduced after temperature is reduced from the bottom taphole of heat and mass tank 5
Outflow, stands into crystallizing tank 9：The clear mother liquor on the top of crystallizing tank 9 flows into the cold side of heater 2 by clear Recycling Mother Solution pump 1；Knot
Brilliant tank（9）The concentrated solution of bottom flows into maturator 10, to crystal is separated out after the low boiling working fluid heat release of its cold side, forms magma,
Magma flows to densitometer 12 by magma pump 11：When magma density is ineligible, magma passes through magma circulating pump 13 again
Flow into maturator 10；When magma density is eligible, magma flows into magma tank 14, and the magma in magma tank 14 flows into centrifuge
15 carry out separation of solid and liquid：The crystal that centrifuge 15 is isolated is stored in crystal tank 16；The mother liquor that centrifuge 15 is isolated passes through
Mother liquor pump 17 flows into the cold side of heater 2, so circulation.
Low temperature low boiling working fluid is flowed into from the cold side input port of maturator 10, and low temperature is become after absorbing wherein solution liberated heat
Steam, after Low Temperature Steam is through the increasing temperature and pressure of compressor 18, flows into from the hot side entrance of heater 2, goes out to its cold side low concentration solution
Heat, then expanded valve 19 expand, decrease temperature and pressure becomes initial cryogenic state, so circulates work.
Claims (5)
1. a kind of caloic simultaneous interpretation evaporation and crystallization system, it is characterised in that：
The system includes clear Recycling Mother Solution pump（1）, heater（2）, heat and mass tank（5）, crystallizing tank（9）, maturator（10）, it is brilliant
Stock pump（11）, densitometer（12）, magma circulating pump（13）, magma tank（14）, centrifuge（15）, crystal tank（16）, mother liquor pump
（17）, compressor（18）, expansion valve（19）；Wherein heat and mass tank（5）Spray equipment including being disposed thereon portion（3）, in
The filler in portion（4）With the distribution device of bottom（6）；
Heat and mass tank（5）Including upper air outlet, top solution inlet, lower air inlet and bottom taphole；Knot
Brilliant tank（9）Including the outlet of solution inlet, the clear mother liquor outlet in top and bottom concentrated solution；Maturator（10）Including concentrated solution entrance,
Top magma entrance, the outlet of bottom magma, cold side input port and cold side outlet port；Densitometer（12）Including magma entrance, qualified magma
Outlet and the outlet of unqualified magma；Centrifuge（15）Including magma entrance, crystal outlet and mother liquor outlet；Heater（2）Including
Hot side entrance, hot side outlet, cold side input port and cold side outlet port；
Material inlet（21）With heater（2）Cold side input port is connected, heater（2）Cold side outlet port and heat and mass tank（3）Top
Solution inlet be connected, heat and mass tank（5）Bottom taphole and crystallizing tank（9）Solution inlet is connected, crystallizing tank（9）Top
Clear mother liquor outlet is by clear Recycling Mother Solution pump（1）With heater（2）Cold side input port is connected, crystallizing tank（9）Bottom concentrated solution outlet
With maturator（10）Concentrated solution entrance is connected, maturator（10）Bottom magma outlet is by magma pump（11）Afterwards with densitometer（12）
Magma entrance is connected, densitometer（12）Unqualified magma outlet passes through magma circulating pump（13）With maturator（10）Top magma enters
Mouth is connected, densitometer（12）Qualified magma outlet and magma tank（14）Entrance is connected, magma tank（14）Outlet and centrifuge（15）
Magma entrance is connected, centrifuge（15）Crystal is exported and crystal tank（16）It is connected, centrifuge（15）Mother liquor outlet passes through mother liquor pump
（17）With heater（2）Cold side input port is connected；
Maturator（10）Cold side outlet port passes through compressor（18）With heater（2）Hot side entrance is connected, heater（2）Hot side outlet
By expansion valve（19）With maturator（10）Cold side input port is connected.
2. caloic simultaneous interpretation evaporation and crystallization system according to claim 1, it is characterised in that：
System also includes and heat and mass tank（5）The connected air blower of lower air inlet（8）, or/and with heat and mass tank（5）
The connected air-introduced machine of upper air outlet（7）.
3. caloic simultaneous interpretation evaporation and crystallization system according to claim 1, it is characterised in that：Maturator（10）It is middle that stirring is set
Device（20）.
4. the method for work of a kind of caloic simultaneous interpretation evaporation and crystallization system according to claim 1, it is characterised in that including with
The lower course of work：
Air is from heat and mass tank（5）Lower air inlet flow into, conducted heat with the low concentration solution for spraying from top to bottom
After mass transfer, from heat and mass tank（5）Upper air outlet enter environment；
Material is from material inlet（21）Inflow system, with clear Recycling Mother Solution pump（1）The clear mother liquor and mother liquor pump of outlet（17）Outlet
Mother liquor mixing after form low concentration solution, low concentration solution flows into heater（2）Cold side, absorb its hot side low boiling working fluid
After liberated heat, from heat and mass tank（5）Top solution inlet is flowed into, and in spray equipment（3）Effect become tiny liquid
Drop, then in filler（4）In there is heat and mass with the air that flows from bottom to top, moisture is passed after reducing temperature reduction from heat transfer
Matter tank（5）Bottom taphole outflow, into crystallizing tank（9）Middle standing：Crystallizing tank（9）The clear mother liquor on top is followed by clear mother liquor
Ring pump（1）Flow into heater（2）Cold side；Crystallizing tank（9）The concentrated solution of bottom flows into maturator（10）, to the low boiling of its cold side
Crystal is separated out after working medium heat release, magma is formed, magma passes through magma pump（11）Flow to densitometer（12）：When magma density does not meet
During condition, magma passes through magma circulating pump（13）Again flow into maturator（10）；When magma density is eligible, magma is flowed into
Magma tank（14）, magma tank（14）In magma flow into centrifuge（15）Carry out separation of solid and liquid：Centrifuge（15）The crystalline substance isolated
Body is stored in crystal tank（16）In；Centrifuge（15）The mother liquor isolated passes through mother liquor pump（17）Flow into heater（2）Cold side,
So circulation；
Low temperature low boiling working fluid is from maturator（10）Cold side input port is flowed into, and low temperature steaming is become after absorbing wherein solution liberated heat
Vapour, Low Temperature Steam is through compressor（18）After increasing temperature and pressure, from heater（2）Hot side entrance is flowed into, to its cold side low concentration solution
Go out heat, then expanded valve（19）Expansion, decrease temperature and pressure becomes initial cryogenic state, so circulates work.
5. the method for work of caloic simultaneous interpretation evaporation and crystallization system according to claim 4, it is characterised in that also including following
The course of work：System also includes and heat and mass tank（5）The connected air blower of lower air inlet（8）, and with heat and mass tank
（5）The connected air-introduced machine of upper air outlet（7）；Air is in air blower（8）Blowing force and air-introduced machine（7）The double action of suction
Under, flow through heat and mass tank.
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| CN201710009546.7A CN106693414B (en) | 2017-01-06 | 2017-01-06 | Caloic simultaneous interpretation evaporation and crystallization system and its working method |
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| CN201710009546.7A CN106693414B (en) | 2017-01-06 | 2017-01-06 | Caloic simultaneous interpretation evaporation and crystallization system and its working method |
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Cited By (3)
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| CN107961555A (en) * | 2017-12-11 | 2018-04-27 | 石媛瑗 | A kind of liquid vaporising unit and method of evaporating |
| CN108467051A (en) * | 2018-05-24 | 2018-08-31 | 南京紫晶藤节能科技有限公司 | Crystal separator and method in potassium chloride magma |
| CN109966766A (en) * | 2019-03-15 | 2019-07-05 | 南京航空航天大学 | In conjunction with heat pump energy-conserving high-efficiency evaporating and crystallizing and air dehumidification system and method |
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| Publication number | Publication date |
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| CN106693414B (en) | 2018-12-07 |
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